The first part of the construction technology and construction method

The subgrade earthwork quantity of this contract (KA0+000-KA9+700): 57649.0m3 of earthwork excavation, 2 1090.4m3 of earthwork excavation, 265243.4m3 of earthwork filling and 22,924.4m3 of earthwork filling. ..

A, the construction scheme

Time limit for a project: April 20, 2065438 +00 ~ August 30, 2065438+00, time limit for a project 130 days.

See attached table 1 for personnel and equipment.

Second, the preparation of subgrade construction

1, organize technicians to read the design drawings and technical data carefully and get familiar with the contract documents and technical specifications.

2. Organize relevant personnel to conduct a comprehensive investigation and check on the route direction, location of borrow yard and spoil yard, topography, road traffic, culvert location, geological and hydrological conditions, leveling points and control piles.

3. Do a good job in site layout and construction, maintenance and construction of temporary facilities.

4. Restore the road centerline and sideline, including subgrade top, toe, side ditch, red line, spoil ground, borrow ground, culvert position and piling, and report to the supervision engineer for inspection.

5. Send the soil sample used as subgrade filler to the central laboratory for standard compaction test according to the specification requirements, calculate the optimal water content and maximum dry density, and carry out tests such as liquid plastic limit, plasticity index, organic matter content, CBR value and particle analysis, prepare the commencement application report and submit it to the supervision engineer for approval.

6. Clean up the ground in subgrade area and borrow yard, and remove topsoil, weeds, roots, silt and obstacles. After the site is cleared, it shall be fully rolled with a roller before filling, so that its compactness can meet the requirements of the regulations and technical specifications, and it shall be reported to the engineer for approval.

7. Excavate temporary drainage ditches along the red lines on both sides of the borrow yard, spoil yard and subgrade, build temporary drainage facilities, keep the construction site in a good drainage state, and prevent the project or nearby farmland from being washed and silted.

Third, temporary drainage measures

For the construction method, please refer to the construction scheme, methods and measures of key and difficult projects in the fourth part.

Four, special subgrade treatment

1, construction scheme

There are 8 soft foundations in this contract section, which are distributed in gully paddy fields and low-lying areas between mountains with large catchment area. It is soft plastic loam, and the red clay below the pavement structure layer of subgrade excavation section is excavated and filled with 80cm gravel.

2, soft foundation treatment construction methods and measures

See the construction scheme, methods and measures of key and difficult projects in the fourth part for details.

Verb (abbreviation of verb) construction of test road section

1, 28 days before the start of the test section, test the filling materials of the test section. Including soil liquid, plastic limit, plastic index, particle analysis, CBR value, heavy compaction test and optimal water content test.

2. Submit the test results of the laboratory, the construction scheme of the test dike, the construction site, equipment and personnel organization, and the format of various record forms to the supervision engineer for approval.

3. With the consent of the supervision engineer, fill the test section at K0+500-K 1+500 in the selected section, with the length of 1000m (full width), and record all kinds of original data of the test section to provide data for the final data collation of the test section.

Field tests shall be conducted until the material can effectively reach the specified compactness. During the test, it should be recorded: the type of compaction equipment and reasonable mechanical equipment; Compaction times and compaction speed, as well as the combination form of each process; The loose laying thickness of materials, the best water content in the construction site, etc. , will be compiled into written materials and submitted to the supervision engineer for approval, as the basis for comprehensive construction of this kind of packing in the future.

5 Each material used for filling shall be subjected to field compaction test.

Six, ordinary road construction methods

Ordinary road section refers to the road section with filling height and excavation depth not exceeding 8m.

(a), earthwork excavation construction

1, excavation method of soil cutting

1), single-layer lateral excavation method

According to the full width of the section, excavate from one end or both ends of the excavated cutting to the design elevation at one time, and gradually dig deep. When the excavation depth is less than 4m, this excavation method is adopted.

2), multi-layer horizontal excavation method

According to the cross section, the excavation shall be started from one end or both ends of the excavated cutting to the design elevation in layers, and the excavation shall be deepened gradually. When the excavation depth exceeds 4m, this excavation method is adopted.

3), channel longitudinal excavation method

First, a tunnel is dug along the longitudinal direction of the cutting, and then the tunnel is used to widen both sides and enlarge the working face, which is the way out for earth-moving route and field drainage. When the first-floor passage is widened to the cutting slope, the lower-floor passage shall be excavated to the subgrade design elevation. This method is suitable for long and deep cutting excavation.

2, stone cutting excavation method

Rock excavation adopts mechanical operation method of loosening soil;

For the severely weathered soft rock, the mechanical operation mode is adopted, and the high-power bulldozer with single tooth scarifier is selected to break and hook the soft rock. After loosening the soil on the surface, it will be transported and stacked by bulldozers, and then transported by excavators or loaders with dump trucks, forming a mechanical circulation operation of loosening the soil → piling → transportation. When choosing a scarifier, we should first analyze and judge the rock properties, and judge the wall opening performance of various types of scarifiers according to the indoor tests (compressive strength and tensile strength) of rocks. When loosening the soil, the loosening direction is along the downhill direction of the rock, and the spacing is1.0 ~1.5m. ..

3. Zero-fill and zero-dig subgrade

Compaction degree should be detected at 80cm below the top surface of subgrade bed, and should not be less than 96%. If it does not meet the requirements, it should dig 80cm again and fill it in layers according to the filling requirements. If it is determined as bad soil or unsuitable material, it must be replaced or mixed with ash.

4. Matters needing attention in earthwork excavation

1), when cutting excavation, the slope ratio and slope stability should be strictly controlled. When excavation, regardless of the excavation amount and depth, it should be carried out from top to bottom, and it is not allowed to dig indiscriminately and overbreak, especially not to dig fairy soil. On the one hand, we should pay attention to the construction method when excavating, such as uncontrolled blasting method, which will easily lead to the instability and collapse of cutting slope. Blasting construction that does not affect slope stability should also be approved. On the other hand, attention should be paid to the construction sequence to prevent slope instability and collapse caused by improper excavation.

2) Water is the main cause of various diseases in cutting, and intercepting ditch should be done well before cutting excavation. During the construction period, temporary drainage facilities should be built.

3) For single-stage cutting slopes, slope protection works shall be carried out immediately after cutting excavation is in place, and for multi-stage cutting, slope protection works shall be carried out immediately after first-stage excavation is in place.

4) After the cutting excavation is basically in place, the blind ditch will be built immediately to reduce the underground water level of the cutting.

5) After the cutting is excavated to the design elevation, the compactness within the range of 0-80 cm below the top surface of subgrade shall be tested. If the compaction degree is less than 96%, it should be further compacted by special compaction machinery until it meets the requirements; Or dig 80cm, and then fill in layers by subgrade filling, and meet the compaction requirements at the same time. If it is found that the subgrade is an unsuitable material or a section with poor soil quality, measures such as replacement or improvement of soil quality should be taken after appraisal by the supervision engineer and approval by the owner.

(2), earthwork filling construction

1, construction method of filling embankment

Subgrade filling shall be carried out in accordance with the requirements of "accuracy, fineness, cleanness, completeness, uniformity, leveling, pressure and inspection", that is, the construction lofting shall be accurate; Detailed construction plan; Dredging is clean; Full-face construction; Balanced construction rhythm; The filling surface is flat; Sufficient and scientific compaction machines and tools; Check the quality.

Embankment filling adopts horizontal layered filling method. The construction technology is as follows:

The treated original ground shall be buried in layers, and the loose laying thickness shall be determined according to the loose laying thickness of the test section, and each layer shall not be more than 30cm. Earthwork should not contain humus, tree roots, grass clippings or other harmful substances. When filling, the elevation of filling soil must be controlled by layers according to the longitudinal slope of subgrade, and paving in parallel by layers to ensure the compactness of subgrade. The grader is used for leveling. During leveling, attention should be paid to keep the two-way transverse slope of subgrade not less than 1.5%, and the width of filled soil exceeds the design width by 50cm on each side. After the construction, each side should be brushed off by 30cm to ensure that the edge of the embankment behind the trimmed slope has sufficient compactness. After the fill is leveled and qualified, the subgrade shall be rolled. The vibratory roller is used for rolling, and its rolling principle is "edge first, middle first, inner first, outer first, static first and then vibrating". Adjacent tracks must overlap 30-50 cm, and the shoulder should be rolled again. When rolling, the driving speed and compaction times should be strictly controlled according to the requirements of the test road. In the process of construction, attention should be paid to the water content of soil before compaction to ensure that it is within the optimal water content range. If it exceeds this range, it should be watered or aired, and then crushed. The top surface of each layer of fill must be made into a transverse slope greater than 1.5% to facilitate the transverse drainage of subgrade.

See the table below for subgrade compactness and packing requirements.

Subgrade compactness and packaging requirements

Filling and mining types

Depth under road trench (cm)

Subgrade compactness

(%)

Minimum strength of filler (CBR%)

Maximum diameter of filler (cm)

Shangshangchuang

0~30

≥96

eight

10

Subgrade subgrade

30~80

≥96

five

10

Shangdudi

80~ 150

≥95

four

15

Low embankment

/kloc-below 0/50

≥93

three

15

Zero fill and zero excavation subgrade

0~80

≥96

eight

10

2. Matters needing attention in embankment filling construction

(1), when the embankment base is cultivated land or loose soil, it should be dredged and cleaned, backfilled and rolled by layers to the degree of compaction required by the specification, and it can be filled only after being reported to the supervision engineer for acceptance.

(2) When the ground transverse slope or longitudinal slope after site cleaning is not steeper than 1:5, subgrade can be directly filled on it. When the transverse slope or longitudinal slope of the ground is steeper than 1:5, the original ground should be excavated with a width of not less than 2m, and the top surface of the steps should be made into an inward slope of 2%, and compacted with a small machine. For sandy soil, do not dig steps, but below the original ground.

(3) When the embankment passes through paddy fields, ponds or low-lying places, the drainage ditch should be dug first, the drainage works should be completed as far as possible, the silt and rotten soil should be removed, the wet soil should be dried, and the soil should be loosened to a depth of 30cm, or compacted after being treated according to the design requirements.

(4) When the height of embankment fill is less than 0.8m, the surface of soil base after original ground cleaning and excavation shall be loosened to a depth of 30cm, and then leveled and compacted, and the degree of compaction shall be ≥96%. When the height of embankment fill is more than 0.8m, the embankment base should be leveled and rolled before filling, and the degree of compaction should not be less than 95%.

(5) The service road or approach road built within the embankment shall not be used as a part of embankment filling, and a new embankment that meets the specified requirements shall be dug out and rebuilt.

(6) Embankment fillers must meet the requirements of specifications, and it is forbidden to use silt, organic soil, soil containing turf, domestic garbage, tree roots and soil with humus characteristics; Soil with liquid limit greater than 50 and plasticity index greater than 26, and soil with water content exceeding the specified value shall not be directly used as embankment filler. When necessary, it can only be used after being mixed with ash.

(7) Any large hard material that cannot be crushed by compaction equipment should be removed or crushed. The maximum size of crushed hard materials shall not exceed 2/3 of the thickness, and the particle size shall be evenly distributed to achieve the required degree of compaction.

(8) When the filled embankment is divided into several operation sections, if the joint is not filled at the same time, the first filling section shall be filled by layers and steps according to the gradient of 1: 1. If two stages are constructed at the same time, each layer should overlap each other, and the overlapping length should not be less than 2m.

(9) The water content of soil should be well controlled during compaction, and the water content of the whole soil should be adjusted when necessary. Before compaction, the filled soil layer should be leveled, and special attention should be paid to uniformity when rolling.

(10), when filling subgrade, test and detection shall be carried out at the same time. Compaction test shall be carried out on each layer of fill in 1000m2, and 4 samples shall be taken. When it is less than 200m2, at least two samples shall be taken for compaction test, and shall be subject to sampling inspection by the supervision engineer at any time.

(1 1), information such as compactness, width, compaction thickness, pile-by-pile elevation, etc. should be reported after the completion of embankment foundation and each layer filling construction, and the construction of subsoil can only be started after the supervision engineer has checked and accepted it.

Seven, half fill and half dig, fill and dig junction, new and old subgrade junction and steep slope section treatment scheme.

See the construction scheme, methods and measures of key and difficult projects in the fourth part for details.

Eight, abutment backfill treatment scheme

In order to reduce the uneven settlement of bridge and culvert abutment backfill and ensure the driving comfort, all bridge and culvert abutment backfill are rolled by layers with good water permeability. The treatment scope of abutment back is: the top is the end of wing wall not less than the height of abutment plus 2m, the bottom is not less than 2m from the inner edge of foundation, the backfill length of culvert is not less than twice the length of aperture on each side, and other parts are filled with earthwork at the same time. See the construction scheme, methods and measures of key and difficult projects in the fourth part for details.

Part II Quality Assurance System and Quality Assurance Measures

In order to ensure that the construction management and engineering quality of the earthwork project in this bid section reach the excellent project, our department will establish a perfect quality assurance system and formulate complete quality assurance measures.

I. Quality objectives

Quality objective of this project: strictly according to the technical requirements, the first pass rate of the project is 1 0,000%, and the excellent rate is over 95%.

Second, the basis of quality assurance

The quality plan of this project is mainly based on the technical specifications in Technical Specifications for Construction of Highway Bridges and Culverts and Model Domestic Bidding Documents for Highway Engineering of the Ministry of Communications.

Third, the quality assurance system

Our company implements refined management of process links, establishes a strict quality management system and improves the quality reward and punishment system. Strictly control the construction quality to meet the requirements of the owner. Take effective safety and environmental protection measures to ensure the smooth progress of construction.

1, quality inspection agency:

1), set up a total quality management leading group with the project manager as the team leader and the chief engineer and technical director of the project management department as the deputy team leader to form a virtuous circle of administrative support and technical control, and be responsible for the overall demand control of the project.

2), by the head of the construction group, technical director and equipped with corresponding technical personnel and inspectors, set up a quality self-inspection team, form a level of self-inspection system.

3) In the process of construction, the quality inspector has the right to intervene in advance, check in the process, accept afterwards and veto the quality. The quality inspection department of the project department is directly responsible to the project management department and is not interfered by anyone or anything.

4) The distribution and relationship of quality inspection functions in the internal quality management system of this project are shown in the attached Quality System Assurance Diagram.

2, process quality inspection procedures:

After each working procedure is completed, the quality inspection team of each class (group) shall conduct self-inspection according to the requirements of design drawings and technical specifications, and report to the project management department for re-inspection after passing the inspection.

Fourth, quality assurance measures

Project quality is one of the main indicators to test the investment benefit, and also reflects the management level and team quality of the construction unit. Therefore, we must emphasize the policy of "quality first", carry out total quality management activities, establish a secondary quality assurance system, strictly control the quality in the construction process, follow the rules and regulations, and implement the chief engineer responsibility system and one-vote veto system to ensure the project quality. Quality management first carries out quality control in advance, and the project intends to set up a laboratory and various professional construction teams.

Pay attention to the quality of the project, strictly enforce the word, and the full-time staff will strictly check everywhere, and implement the "one-vote veto system". The reworked ones must be reworked until they are qualified. Who is responsible for the quality of each process, so that the quality of engineering construction can be effectively controlled.

1, set up a quality inspection agency.

2, set up a quality inspection team, the project manager as the first quality director, the quality inspection team is only responsible for the project manager, responsible for the quality inspection of the whole project, to check the quality does not meet the requirements have the right to stop work, have the right to order rework. The technical director of each construction team (group) is responsible for quality work and carries out quality excellence activities.

3. Strict process quality management

Full-time quality inspectors strengthen the inspection of the construction site, timely check the quality in the construction process, and supervise the construction personnel to strengthen quality control. When the construction technology, method and operation are not up to the requirements, they have the right to make a decision to stop work or rework, and issue a written notice to rectify within a time limit. After the completion of the working procedure, the construction class (group) must organize the quality self-inspection, which shall be approved by the on-site quality inspector and reported to the quality inspection engineer for re-inspection. Take cover engineering, main parts, presided over by the chief engineer, after the quality inspection, fill in the quality inspection sheet, submitted to the site supervision inspection, after signing the opinion, before the next working procedure construction. Resolutely rework the unqualified self-inspection, supervision and owner inspection, and the construction of the next working procedure can only be carried out after the inspection is qualified. When a quality accident occurs, the chief engineer or quality inspection engineer shall organize relevant personnel to analyze the cause of the accident, put forward a defect repair plan and quality rectification measures, and report them to the supervision engineer for approval before implementation. The person responsible for the accident will be financially punished, informed criticism, until he is ordered to leave the construction site, so as to prevent similar accidents from happening again.

3. Strengthen quality awareness and implement quality management system.

(1) Implement the quality assessment system: hold regular quality meetings every month, organize comprehensive quality inspection and assessment, summarize the quality situation, propose quality improvement measures, conduct technical discussions, determine construction countermeasures, and assess the quality management of construction in various disciplines.

First, check the implementation of construction technology and methods

B, the main material quality;

C, measuring the lofting accuracy;

D, construction operation method and operation quality;

E. process self-inspection and inspection;

F, the original records of construction;

G, ZuoYeDui (group) process handover;

H, construction equipment operation specification;

First, the process construction results;

J, post maintenance.

② Implement learning and training system: adopt various ways to improve the technical quality of construction personnel.

(3) Implement the technical disclosure system: the chief engineer is responsible for technical disclosure, and the professional engineers are responsible for decentralized implementation, so that everyone can know fairly well before taking up their posts.

4, pay special attention to the quality management of materials

All materials, finished products and semi-finished products must be inspected before purchasing and approved by quality inspection and supervision. Materials, finished products and semi-finished products entering the site shall be randomly sampled for inspection, and shall not enter the process construction without inspection. Those who fail to pass the inspection shall be cleaned up in time and reported to the project manager and chief engineer. Qualified materials entering the site shall be kept by special personnel and stacked as required to avoid quality degradation. The storage of cement and lime shall not exceed the shelf life.

Verb (abbreviation for verb) quality assurance plan

1, organizational structure and responsibilities See the attached table for the organization chart and main personnel list of the project department.

2. Control of documents and materials

(1) The librarians are responsible for controlling documents and materials, classifying, numbering, keeping, registering and processing them, and establishing a list of valid versions of documents; Ensure that all the places that affect the quality use valid versions of documents and materials; The documents and materials that have been invalidated but still have retained value shall be sealed with "invalid" and stored in isolation.

(2) Control scope of documents and materials:

A variety of technical standards, specifications and atlas; Construction drawings; Construction organization design scheme; Work instructions, technical disclosure, meeting minutes, design changes and supervision notices, etc.

B, after the completion of the project, the project intends to librarians in accordance with the provisions and requirements will be handed over to the owner and relevant departments.

3. Product identification and traceability

(1) The main raw materials, semi-finished products and engineering equipment used in this project shall be marked to distinguish products of different types, specifications and grades, prevent misuse, mixing or use of expired products, and realize traceability.

(2) Product identification principle: Product identification is based on the principle of "who purchases, who produces, who tests and who identifies".

A raw materials of the project department shall be identified by the materials department of the project department, and waste products shall be stored in isolation and identified.

B, warehousing materials should be identified, accounts, materials and cards should be consistent.

C the equipment used in the project shall be identified by the equipment department.

D, all kinds of process results are identified by quality records, including all kinds of inspection and evaluation forms of division, disciplines and unit projects, and acceptance records of concealed works, etc. As the original basis for identification.

E the main materials used in key processes and special processes, such as cement, steel bars and concrete, should be traceable, and the original state of the product can be traced through the recorded marks to complete the secondary verification of the product.

5, process control:

(1), the engineering department of the project intends to control the construction process.

(2), the engineering department is responsible for organizing the preparation and implementation of the design scheme, submitted to the chief engineer for examination and approval, and submitted to the chief supervision representative for approval.

(3), the contract department is responsible for the preparation of the monthly progress plan, the project intends to make careful arrangements for the construction, so that each operation group can flow in line and cooperate in an orderly way.

(6) Technical disclosure:

Technical disclosure in construction preparation stage

A, the project manager, deputy manager, chief engineer, technical director and quality inspection director shall communicate with the designer, Party A and the supervisor before the project construction, and make records.

B, the project intends to contract department, quality inspection department should grasp the design drawings and construction dynamic situation at any time, and timely communicate with on-site technicians.

Technical disclosure in the construction process

A, the project intends to documenter is responsible for the technical data transmission, sending and receiving.

B, by the design representative to the project intends to technical disclosure. The person in charge of technical department of the project intends to make technical disclosure to the person in charge of on-site technology. Before the construction of each working procedure, technicians should make technical disclosure to the construction team to ensure that the disclosure reaches every operator.

C all technical disclosure shall be recorded in formal form.

(7) Measurement control

A, in order to prevent the control points from being offset and destroyed and facilitate the construction lofting, our project department plans to increase the control points on the basis of the original control network. The survey supervision engineer can only use it after the second interview is completely qualified. In addition, the captain of the survey team of the project department should also regularly organize personnel to retest the control network to grasp the changes.

B, the project intends to each construction team surveyor is responsible for the measurement and positioning of this project, the project department quality inspection department survey group is responsible for the retest, and will be reported to the supervision engineer for approval after the retest is correct.

C, according to the actual situation of this project, determine the measurement results of the following items.

I. Elevation view

B, midline

C. The survey control network of the whole line shall be re-surveyed regularly.

(8) Construction equipment control

A, by the maintenance department, head of the site construction machinery and equipment to implement dynamic and static control. Strengthen the management, repair and maintenance of mechanical equipment to ensure its rational use and safe operation.

B establish the technical training system, post responsibility system and safe operation system for the operators of mechanical equipment in this project.

C, the project intends to establish mechanical equipment account, as shown in the project department "mechanical approach list" schedule, and keep a valid copy.

D, the main mechanical equipment comes into play, by the project department equipment department for verification, and be identified.

E, mechanical equipment maintenance and repair must implement the policy of "paying equal attention to maintenance and repair, giving priority to prevention".

F, put into construction machinery and equipment should be in good condition. Mechanical equipment operators should keep equipment operation records.

G, mechanical equipment operators must undergo technical training, must abide by the operating rules, large equipment and special equipment must be fixed machine, a person, a post.

6, inspection and test

Ensure that the laboratory qualification, instruments and equipment can meet the needs of the detection ability of this project. See attached table of test equipment list.

(1) incoming inspection and testing

A, warehouse personnel to the site into each batch of materials (products) specifications, quantity, appearance and certificate of approval and other documents for verification, after verification, fill in the material (products) arrival receipt, notify the central laboratory, and report to the supervision engineer, together to the inventory site in accordance with the relevant requirements of the "test procedures" to sample and mark the samples, send them to the relevant laboratory for testing, and fill in the material list.

B. After receiving the material (product) arrival form of the material keeper, the quality inspector shall notify the central laboratory, report to the supervisor, take samples at the inventory site together according to the relevant requirements of the inspection regulations, mark the samples, and then send them to the relevant laboratories for inspection or testing, and fill in the material (product) arrival form.

C. The test items required in the material (product) inspection sheet of the central laboratory shall be tested or tested according to the test method specified in the test, and the material (product) inspection test report shall be filled in duplicate and submitted to the test supervision engineer for examination and approval, and one copy shall be returned to the central laboratory, which shall be handed over to ministry of materials and equipment, and ministry of materials and equipment shall submit it to the pavement supervision engineer for examination and approval together with the quality inspection department. The pavement supervision engineer will feed back the results to the material department, which will report the results to the relevant departments in writing.

D, engineering materials that have passed the acceptance and signed by the supervision engineer shall be identified by the quality inspector in conjunction with the material engineer and stored in the designated area.

E unqualified products are divided into unqualified materials and unqualified process results.

F important materials such as structural steel that have not been inspected and tested shall not be put into use, and shall not be released urgently.

(2) Process inspection and test

A, the construction personnel and surveyors of each construction team shall conduct self-inspection for each working procedure and various concealed works, disciplines, divisions and disciplines in the construction process according to the requirements of Construction Process Control Procedure and the relevant provisions of Technical Specifications for Highway Engineering Construction.

B, after the technical indicators of self-inspection are qualified, the builder of each construction group shall fill in the Engineering Quality Inspection Record Form and the Sub-project Application Form as required, which will be audited by the quality inspector of the quality inspection department of the project management department on site, signed and submitted to the supervision engineer for inspection or acceptance. Only after passing the inspection or acceptance and being signed by the supervision engineer can we enter the next working procedure.

C, the construction process after inspection or acceptance, without the signature of the supervision engineer, shall not enter the next working procedure.

(3) Final inspection and testing

A. After the project construction is completed according to the contract and design drawings, and the concealed works, subdivisional works, divisional works and unit works are all qualified, the chief engineer of the project management department shall organize engineers and technicians to sort out the required information according to the Measures for Completion Acceptance of Highway Engineering and the Standard for Quality Inspection and Evaluation of Highway Engineering, conduct internal acceptance of the projects stipulated in the contract, and prepare an internal acceptance report, which shall be submitted to the head office for technical review and approval.

B, after the internal acceptance and completion data are fully prepared, report to the owner or his representative for appointment acceptance, and go through the prescribed acceptance procedures, and both parties shall sign and seal the acceptance form.

C. Non-conformities found in internal acceptance and owner's acceptance shall be handled according to the Company's procedure document "Control Procedure for Qualified Products".

(4) Inspection and test records

A, inspection and test records should be filled in by authorized inspection and test personnel, and signed by the head of the inspection and test department, and the technical director of the construction project stipulated in the contract should also sign for confirmation.

B original documents of inspection and test records shall be kept by the laboratory.

7. Control of inspection and test equipment

(1), the laboratory director is responsible for the control and management of the inspection and test equipment of this project, and the measurement team leader is responsible for the control and management of measuring instruments. According to the inspection, measurement and test, establish the account.

(2) The inspection, measuring and test equipment of the sample shall be uniformly identified by the responsible person, and the identification shall be based on the qualified use certificate issued by a qualified verification unit. Signs should be placed in conspicuous places, and at the same time, they should be prevented from being polluted and falling off.

(3) All users should strictly observe and strictly abide by the operating procedures during use, so as to prevent the calibration of the equipment from failing due to improper use and adjustment.

(4), stop using the equipment should be clear sign, scrapped equipment should be evacuated from the scene.

8. Control of inspection and test status

(1), and the inspection and test status includes: pending inspection, qualified, unqualified and test results to be determined.

(2) The inspection and test status shall be marked to ensure that the specified inspection and test items are not missed or delayed; Ensure that raw materials that fail the inspection are not used, and the processes that fail the inspection are not transferred.

(3) The quality inspector of the project intends to identify the inspection and test status of raw materials, and the status identification is reflected on the identification board and identified with the products.

(4) The inspection and test status of the process results are controlled by the on-site builder of the project management department and the personnel of the quality inspection department of the project department. After passing the inspection, it shall be reported to the supervision engineer for visa approval before entering the next working procedure, otherwise it shall not enter the next working procedure.

(5) When the status changes according to the situation, the logo should be replaced in time to ensure the accuracy and clarity of the logo. If the identification is unclear or altered, relevant records shall be found and identified in time.