XX small (2) reservoir reinforcement project completion report is 1. According to the comprehensive description, XX Reservoir was built in 1970, and the hub project was completed in 1976. It has been running for 3 1 year, and passed the appraisal of XX dam safety appraisal expert group in June 2006. The appraisal conclusion is that the inner slope of the dam is seriously eroded by wind and waves, the flood control standard is not enough, and the height and width of the dam top are not enough, so it is classified as a third-class dam. The reservoir is located in XX Village, XX Township, XX City, and the XX River is a tributary of the XX River. XX is a small (II) reservoir, mainly for irrigation and aquaculture. The rainwater collection area of the reservoir is 0.9 square kilometers, and the total storage capacity10.96 million cubic meters, of which the effective storage capacity10.402 million cubic meters. The dam is an earth-rock dam with clay core wall, with a height of 2 1.0m, a crest elevation of 546.5438+0m, a crest width of 3.0m and a crest length of 2 15m. The spillway is located on the right side of the dam and consists of overflow weir, steep trough and stilling basin. Total length of spillway107m. The steep trough is directly connected with the river bed, and the erosion is serious. XX reservoir hub belongs to ⅴ and other projects, and the main building level of the hub is Grade 5. The flood control standard is designed according to the 20-year return flood and checked according to the 200-year return flood. 1. 1 Project Overview XX Reservoir is a small-scale (II) water conservancy project with irrigation as its main function and both aquaculture and flood control. The reservoir is located in XX Bay, XX Village, XX Township, at the northeast of XX City 105km, belonging to the tributary of XX River. The rainwater harvesting area above the dam site is 0.9km2, the maximum dam height of the reservoir is 2 1m, the total storage capacity is196,000 m 3, the effective storage capacity is140,200 m3, and the dead storage capacity is 880,000 m3. The existing main canal is 4.0 kilometers long and the irrigation area is 800 mu. The reservoir hub consists of three parts: dam, spillway and drainage facilities. 1. 1. 1 dam XX reservoir dam is a mixed dam with clay core wall, with the maximum dam height of 2 1.0m, the crest height of 546. 1m, the crest width of 3.0m, the crest length of 2 15m, and the upstream. The dam has a drainage prism with a top width of 3.6m and a bottom width of 34.6m, with an inner slope of 1: 1.25 and an outer slope of 1: 1.8. The internal and external slopes of the dam are uneven and partially deformed, and the internal slopes of the dam are seriously eroded by wind and waves. 1982 has local internal landslide, and the internal slope needs to be rectified. 1. 1.2 spillway spillway is located on the left side of the dam, with an open wide-topped weir overflowing, and the elevation of the dam crest is 544.6438+0m. Spillway consists of control section and steep groove, with total length of 107.2m and width of 3m. There is no stilling basin, and the first section of the steep trough is unlined. The steep groove is only marked with a line of 55m, with a width of 3m and a slope of i=0.833. Moreover, the maximum allowable discharge of spillway is 14.65m3/s, and the maximum discharge is 4.5m3/s, so the standard of spillway is not enough. 1985, a rockfall occurred in the first section of the spillway, with a length of 40m and a height of 10m, blocking the spillway. In the same year, the spillway was cleaned, and the side wall was not laid except for the collapsed objects. In the steep groove section of spillway, the thickness of the stone lining on the bottom plate of the side wall is 0.3m At present, the side wall of spillway is seriously deformed, and many side walls are broken, with the maximum joint width of 5cm. The slats on the spillway floor and side walls are severely weathered, and the scouring phenomenon is obvious. There are many broken floors and side walls. The downstream of the spillway is connected with the riverbed, and the riverbed is seriously eroded. 1. 1.3 drainage facilities The drainage facilities of this reservoir adopt the structure of bank culvert and horizontal pipe, which consists of culvert pipe, horizontal pipe and stilling basin. The drainage elevation is between 540.00 and 544.00 meters, and there is a drainage hole with a diameter of 0.2 meters. The height difference of the drainage hole is 1 meter, and the maximum drainage flow is 0. 1.2 cubic meters/second ... The horizontal pipe is 4.64 meters long, and the specific gradient i=0.26, which is a box structure. The whole drainage facilities are mortar masonry, and the culvert leaks. 1.2 reinforcement scheme 1, dam reconstruction: internal slope protection: removing debris on the slope surface of the dam, using 150 concrete slab for slope protection, with a thickness of 0.06 m, sand as the cushion under the slab, with an average thickness of 0.65438+30cm, stones at the toe of the slope as gravity piers, and stones at both ends of the dam as kerbs to the dam height. Outer slope: the foot of the outer slope is 60m long, and the slope ratio of the outer foot of the gentle slope reaches 1:2. Steel bars are used as gravity piers to reinforce the dam, and steel bars are used to build standard external slopes. 2. Spillway: the side wall of the spillway is made of M7.5 mortar masonry, and the bottom plate is made of 0.2m C20 concrete ... 3. Drainage facilities: remove the horizontal pipe of the leaking drainage culvert and reuse the masonry. 4. Channel: The newly-built channel is 70 meters long, C20 concrete is poured, and the mouth is made of stones. 5. Termite control: Comprehensive termite control was carried out in XX Reservoir, and experts from Hubei Termite Control Institute were invited for on-site treatment. 1.3 implementation completed 1.3. 1 dam reconstruction completed 1 130m2 internal and external slope debris removal, slope specifications reached the set slope; Complete the reinforcement masonry of the inner slope of the 63m gravity pier, the slope protection of 580m2, and the edge pressing of the dam crest stone; By strengthening the outer slope, the masonry of gravity pier for dam protection was completed, the slope of dam foot was slowed down, and the whole outer slope was paved with stones. The termite damage of the dam was completely prevented, the ant nest was cleared, and the dam body and its surrounding area were comprehensively treated. 1.3.2 spillway reconstruction: spillway reconstruction and expansion are completed: diversion section, steep trough section and energy dissipation facilities are expanded, and lining treatment is carried out in an all-round way. All the original cracked side walls are removed and re-lined. 1.3.3 The horizontal pipe of the collapsed leaking drainage culvert was removed for seepage control and rebuilt with battens. 1.3.4 The stone excavation and lining of170m channel have been completed. 2. Project construction scheme 2. 1 Basic information: the dam is 65m long, the dam crest is 3m wide, the toe of the outer dam is 60m long, there are drainage prisms, the outer dam slope is 7m high, the average ratio of the outer dam slope is 1: 1.3, and the average ratio of the inner slope is1:/kloc. The spillway entrance is 4m wide, the overflow section is 9m, the steep trough section is 16m, and the return channel is 30m. 2.2 improvement scheme 1, internal slope protection: C 15 concrete slab slope protection, with a thickness of 0. 1m, and the cushion under the slab is sand, with an average thickness of 0. 15m ... The toe of the slope is made of stones as gravity piers for dam protection, which are made of 40 ×40 cm stones and are about 50m long. At both ends of the dam, 30×30 cm stones are used to reach the dam top. The top surface of the inner slope dam is paved with laths, which are 30cm high and 40cm wide. During masonry, the dam slope ratio should reach 1: 2, and the slope surface should be smooth and free of sundries. 2. Outer slope: the foot of the outer slope is 60m long, and the slope ratio of the gentle slope reaches 1:2. Backfill with block stones, and reinforce the toe of the slope with strip stones, which are used as gravity piers for dam protection, with a height of 2m, a bottom width of 1.5m and a top width of 0.8m..3. Spillway: the overflow section is 55m long, and the first section is 4m wide after masonry. M7.5 mortar slats are used for masonry, with a masonry thickness of 0.6m and a height of 2.5m. The bottom plate is poured with C20 concrete of 0.2m.. After masonry, the clear width and depth of the steep slope trough are 2.5m and 1m respectively, and the clear width and depth of the backwater channel after masonry are 1m and 1m respectively. M7.5 mortar is used for masonry, and the masonry side wall is 0.6m thick, with a height of 1m and a bottom plate of 0.2m. C20 concrete is poured. 4. Drainage facilities: the collapsed 80-meter-long horizontal drainage pipe and 5×3×3-meter-long stilling basin are removed and rebuilt with battens. 5. Channel: The channel is 70 meters long with a rectangular section of 40×50 cm. Poured with C20 concrete of 0. 1 m, sealed with stones, with a thickness of 0.2m and a width of 0.3m.. 6. Termite control: Comprehensive termite control was carried out in XX Reservoir, and experts from Hubei Termite Control Institute were invited for on-site treatment. 2.3 Construction method: concrete slab is prefabricated on site, poured manually and laid. Manually remove impurities from the inner slope, and use pile line to correct and level the slope. Spillway cleaning and excavation, manual excavation to the masonry section. The construction period is 4 months, and the building materials are purchased locally and nearby. 2.4 The engineering quantity is 1, the dam: 150 concrete slab is 57.9 cubic meters, the mortar rubble 150 cubic meters, the sand cushion is 56 cubic meters, the slope cleaning and shaping is 579 square meters, the excavation 144 cubic meters and the backfill 185 cubic meters. 2. Outer slope: 80 cubic meters of earthwork excavation, 85 cubic meters of stone excavation, 258 cubic meters of dry masonry, 345 cubic meters of block stone, and backfill gravel 190 cubic meters. 3. Spillway: 80 cubic meters of stone excavation, 50 cubic meters of earthwork excavation, 90 cubic meters of masonry, 30 cubic meters of earth filling and 48.8 cubic meters of floor concrete. 4. Drainage facilities: earthwork excavation of 325m3, rubble removal of 95m3, mortar rubble 155m3, backfill soil 190m3. 5. Channels: 3 m3 for rock excavation, 2 1 m3 for earth excavation, 0/0 m3 for masonry, 0/0 m3 for earth filling, 0/5 m3 for concrete. 2.5 Investment 2.5. 1 Source and use of funds According to the design scheme of the reinforcement project of XX Reservoir, it shall be submitted to the superior business department for review. The total investment of the project is 738 1 10,000 yuan, the state subsidizes 350,000 yuan, and the beneficiary farmers raise 388 1 10,000 yuan. The main project construction uses state subsidies, carries out bidding and comparison, and is undertaken by qualified construction companies. Beneficiary farmers' self-raised funds are used for supporting project construction and compensation for young crops, trees and land occupation. Reimbursement of state funds and self-raised funds shall be arranged and used by local project management units or villagers' committees according to the content of project construction. 2.5. 1 main project investment The main project investment uses state funds, with a total investment of 344,559 yuan. The investment of the construction project is 3 1.4559 million yuan, of which: C 1.5 concrete is 57.9 cubic meters, and the unit price of 700 yuan (including masonry) is 40,530 yuan; M7.5 360 mortar masonry, with a unit price of 86,400 yuan in 240 yuan; Sand cushion 100 m3, unit price 150 yuan (including leveling), namely 15000 yuan; C20 concrete is 48.8 cubic meters, and the unit price of 680 yuan (including pouring and curing) is 33 1.84 million yuan; Rock excavation168m3, 50 yuan (including 50m transportation) unit price is 8400 yuan; Excavate 620 cubic meters of earthwork, with a unit price of 15 yuan (including 50 meters of transportation or leveling), totaling 9300 yuan; Slope cleaning and shaping 1.200 m2, and the unit price of 2.5 yuan (including impurity removal) is 3,000 yuan; The earthwork volume is 6 10 m3, and the unit price in 25 yuan is10.525 million yuan; Remove 95 cubic meters of slats, and the unit price of 88 yuan (including 50 meters of transportation) is 8.36 million yuan; 258 cubic meters of dry masonry, unit price 150 yuan, totaling 40,800 yuan; Unit price of 345 cubic meters of stone 143 yuan, that is, 49,335 yuan; Termite control is estimated at 5,000 yuan. Other engineering expenses are 20,000 yuan, and the engineering construction management expenses are 654.38+0,000 yuan. 3. The reinforcement project of 3.XX reservoir construction is organized by the Municipal Water Conservancy Bureau, and three companies with water conservancy construction qualifications participate in the election. The engineering section (including XX Reservoir, XX Reservoir, XX Reservoir and XX Reservoir) is selected by XX Construction Company, and the company sends construction technicians to organize the construction on site according to the design scheme and the requirements of the water conservancy bureau. The reinforcement project of XX Reservoir started construction in March 2008 and was fully completed in June 2008. In June 2008, it passed the acceptance test and was put into operation. 3. 1 Construction Organization In order to ensure the smooth construction of the project and meet the quality standards required by the specifications, the construction company implements the project manager responsibility system, and the project manager sets up the on-site construction team of Wang Jiagou Reservoir to carry out the reinforcement project of Wang Jiagou Reservoir. During the construction, a geotechnical and concrete construction team was set up in strict accordance with the technical characteristics of the construction project. The construction team leader was a person with professional skills in geotechnical and concrete construction, and the construction personnel were a geotechnical worker. 3.2 Construction Procedures and Methods Strict construction procedures are an important guarantee for building quality. The construction company has formulated construction procedures and masonry and concrete slab masonry methods, which are used to reinforce and protect the inner slope, reinforce and slow down the outer slope, adjust spillway, adjust drainage facilities and build channels respectively. 3.2. 1, building materials 1, materials and stones: organize masons to mine in a quarry 50m away from the dam, * * * mine 670 cubic meters of strip stones and 345 cubic meters of block stones, and transport them to the construction site manually. 2. Concrete material: organize to purchase 30 tons of cement in Langzhong material market, 200 cubic meters of river sand (including cushion material) and 90 cubic meters of 5-20 fine pebbles from Wencheng. 3.2.2 Construction method: 1, C 15 precast concrete slope protection boards, concrete: 200m2 site is rented in Zhan Feng Township, and concrete pouring technicians are organized to form and prefabricate, and the precast thickness is 0. 1cm. Due to the small volume of concrete, it is tamped by manual pouring and electric vibrator, and transported to the construction site after the curing period expires. C20 concrete shall be delivered to the site, poured and maintained. 2. Stone: After transported from the quarry to the construction site, the molding surface will be processed by the stone technician for installation. 3.2.3 Construction procedure 1, slope protection of inner slope: remove weeds and humus layer on the slope and level the slope to 1: 2; M7.5 stone gravity pier is laid at the foot of slope; The artificial compaction thickness of sand cushion is10cm; Laying C 15 concrete slope protection board and jointing; The piers on the dam body and bank slope are made of M7.5 stones, the size of which reaches 40×40cm. 2. Dam crest: remove weeds and trees from the dam crest, manually level and tamp the dam crest, standardize the edge line of the inner slope dam crest, and use M7.5 mortar to build and strengthen the slope protection concrete slab, with the masonry height reaching 0.4m of the wave wall. Outer slope: remove miscellaneous trees and weeds, reinforce the toe of the masonry dam with processed stone to reach the design size, and reinforce the outer slope of the masonry dam with block stones to reach the design slope. 4. Spillway: remove the collapsed earth and stone of the spillway, excavate and reshape the irregular overflow section to reach the design section size of the discharge; M7.5 mortar is used to build stone side walls. After the side wall is completed, C20 concrete floor will be poured on site, and it will be tamped and maintained manually. 5. Drainage facilities: remove the culvert and horizontal pipe in the leaking section, and build with processed stone and M 10 mortar. 6. Channels: remove the weeds and trees on the slope, manually dig stones to form channels, build side walls with M7.5 mortar, cast C20 concrete floor on site, and tamp and maintain manually. 3.3 Project completion: 1. Dam: gravity pier masonry, used to reinforce inner slope, gentle slope and filling; Dam: slope protection: 584m2, masonry and reinforcement at the junction of dam slope and bank slope; Complete the mortar masonry reinforcement at the foot of the outer slope and the mortar masonry backfill at the gentle slope; The shaping of the dam crest and the masonry of the upstream face stone pressure wave wall were completed. The termite damage of the dam was completely prevented, the ant nest was cleared, and the dam body and its surrounding area were comprehensively treated. 2. Spillway: Spillway has been cleared and expanded, and side wall masonry and bottom concrete pouring have been completed. 3. Drainage facilities: The anti-seepage construction of drainage culvert has been completed. 4. Channel: newly-built170m seepage-proof channel. 3.4 project acceptance 1. Building materials: After all kinds of building materials enter the site, Party A or local township representatives shall conduct on-site verification. Building materials can be used in all kinds of masonry only after they are considered to meet the requirements of specifications. 2. Stage acceptance: After each working procedure is completed, the company will send quality supervisors to conduct on-site inspection. If it does not meet the requirements of the design specification, it will be reworked to meet the quality requirements of the specification, and Party A shall be invited to the site for acceptance before proceeding to the next working procedure. 3. Completion acceptance: After the project is completed, the company conducts self-inspection and finds that all the contents stipulated in the agreement have been completed and the quality meets the specification requirements. June 65438+February 65438+March 2008, the company applied to Party A for acceptance. After receiving the application acceptance report, the Municipal Water Conservancy Bureau organized an acceptance team composed of relevant technicians and township government leaders to conduct on-site acceptance on June 5438+February 65438+August 2008. The acceptance team believes that the construction content stipulated in the agreement has been completed and the quality meets the specification requirements, and the acceptance is passed. 4 Project Investment The preliminary design of Wang Jiagou Reservoir reinforcement project has passed the examination of the expert group organized by Nanchong Water Conservancy Bureau. The total investment is 7,386,543.8 million yuan, including 600,000 yuan for construction projects, 654,380 million yuan for other projects and 386,543.8 million yuan for other expenses. The national subsidy for the project construction is 350,000 yuan, and the local beneficiary farmers raise 388,654.38 yuan+0,000 yuan. 4. 1 Bid-winning investment price According to the requirements of the comparison and selection documents, only the part invested by the state for the main project construction is subject to bidding and comparison. Shunda Company won the bid of 349,800 yuan. 4.2 Project completion investment is 4.2. 1 completed engineering quantity * * completed earthwork volume is 2,639.8 cubic meters, including: 58.4 cubic meters of C 15 concrete, 347 cubic meters of 7.5 M mortar rubble, 90 cubic meters of sand cushion, 48.8 cubic meters of C20 concrete, stone excavation 185 cubic meters, and earthwork excavation. Remove 95 cubic meters of flaky, 1 130 square meters of plastic debris on the inner and outer slopes, complete the removal of termite nests in the dam, and comprehensively control the dam body and its surrounding areas. 4.2. 1 The total investment is 354.242 million yuan, of which the construction project investment is 320.242 million yuan and the construction management fee is 1 10,000 yuan. See the following table: XX Reservoir Completion Investment Settlement FormNo.112345678 9123438+0 2 Project cost name Building engineering slope shaping and impurity removal m3 earthwork excavation earthwork filling and earthwork stripping C 15 concrete slab slope protection sand cushion mortar masonry. Management fee for prevention and control of termites in Shi Gan stone block for C20 concrete dry paving of spillway floor. The total management fee of the company is M3M3M3M3M3m3130 630185176 95 58.490 347 48.8158 373. 3.50 25.00 68.00 35.00 88.00 693.50167.00 280.00 680.00193.00153.00 unit quantity unit price (yuan) combined price (ten thousand yuan)