In recent years, with the continuous improvement of material living conditions, people's requirements for quality of life are also constantly improving. More and more people realize that beautifying the environment is of great benefit to cultivating beautiful sentiments and benefiting physical and mental health. Real estate developers have put up signs of green ecological garden-style residential areas to attract customers to buy; At present, the state has also formulated the strategic goal of establishing a forestry ecological province in many provinces, and vigorously advocated expanding urban green space and improving forest coverage. The greening of the whole people needs a group of professional greening supervisors who understand design, construction and management to supervise and manage greening projects such as courtyards, roads and parks. At present, there is not a complete set of normative documents for greening supervision in China, but only the relevant documents of civil engineering are copied. As a professional project, greening project also has its own professional characteristics in construction and management. I have been engaged in the supervision of greening projects for many years, and summarized some key points of how to strengthen the management of greening projects from the aspects of construction quality and safety, construction progress and investment, engineering data arrangement and project acceptance, and discussed with my colleagues here.

First, establish a perfect and strict greening supervision institution.

To do a good job in the supervision of greening projects, we must first have a lean, efficient and professional organization to ensure coordination. According to the relevant engineering supervision regulations, the greening supervision project is also established under the premise of accepting the entrustment of the owner and signing the supervision contract. The agent should be determined according to the service content, service period scale, engineering category, technical complex procedures, engineering environment and other factors agreed in the entrusted supervision contract. Generally, it includes the chief supervision engineer, the representative of the chief supervision engineer, the professional supervision engineers and supervisors of greening, gardening, water and electricity, etc. According to the work system of director responsibility system, the chief supervision engineer is responsible for the overall work, organizes supervisors of various disciplines to write supervision plans, attends design disclosure meetings, signs meeting minutes, and appoints division of labor personnel of various disciplines. At the same time, the greening supervision organization must also abide by the rules and regulations formulated by the supervision company. Supervisors should obey the work arrangement of professional supervision projects, professional supervision engineers should obey the division arrangement of chief supervision engineer, and the chief supervision engineer should obey the division arrangement, so as to carry out supervision work in an orderly manner with clear responsibilities.

Two, strengthen the supervision and management of greening engineering construction quality and safety.

(A) greening project construction quality management

1. Do a good job in quality control of soil and base fertilizer.

According to the broad-spectrum characteristics of plants, when the PH value of soil is between 6.5 and 7.5, it is more suitable for the growth of most plants, and the most suitable planting soil for plant growth should be vegetable garden soil or paddy soil. At present, because many infrastructure projects need a lot of backfill soil to break ground, and many other landscaping projects also need vegetable garden soil and paddy soil as planting soil, there is a general shortage of vegetable garden soil and paddy soil in large and medium-sized cities. The solution is to improve the soil, mix the dried pond mud and red soil in the volume ratio of 7: 3 or 6: 4, and spread it on the grass roots as planting soil.

2. seedling size and planting technology control.

The construction of greening project should meet the design requirements, and the survival rate of seedlings should be ensured during planting and maintenance, so when selecting seedlings, the corresponding varieties should be selected according to the provisions of design drawings first; Secondly, it is necessary to control the selection of strong seedlings at the entrance of seedlings, that is, to control the specifications of seedlings entering the site from six aspects: DBH, tree height, branch height, crown width, crown height and soil ball according to the design specifications. The control of seedling planting technology is also very important. Different tree species adopt different technical measures to ensure the success of planting. This is an example of the sea printing dates. When the ground diameter of Hai Yin jujube is ≥50cm and the dry height is ≥3m, it belongs to large Hai Yin jujube. Because of its high price, it is very important to ensure its survival rate. Pay attention to the following three links when planting: first, dig a planting hole with a diameter larger than the soil ball 10 ~ 20 cm; Second, after loosening the soil, spread ceramsite with a thickness of about 5cm. Strict control of seedling quality and planting technology is the premise to ensure the quality of greening construction.

(2) Safety supervision and management of greening construction

1. Safety control of horizontal operation in greening project

Parks, courtyards and roads in landscaping projects all belong to the scope of horizontal greening projects. Construction safety is mainly aimed at transplanting large areas of trees. Safety control of excavation, transportation, follow-up, planting and maintenance of trees in construction is the key to ensure the safety of construction level. Specifically, when digging seedlings, we should try to avoid splitting big roots and leave more fibrous roots. In the process of loading and unloading seedlings, attention should be paid to the operation safety of lifting machinery. The construction unit shall inspect the machinery entering the site in strict accordance with the safety regulations, and the operators shall hold relevant certificates to ensure that no safety accidents occur. When transporting trees, the soil balls should be tied tightly, and the roots should be covered tightly with tarpaulins to prevent the roots from losing water. Be careful not to collide with soil balls when unloading seedlings to ensure the survival of trees.

2. Safety control of vertical operation of greening project

In the process of greening construction, I often encounter vertical operations. For example, in the supervision of the greening project of Nansha quarry, scaffolding needs to be erected for the greening of stone walls, and corresponding safety measures need to be taken. First of all, scaffolding must comply with safety regulations and be laid firmly according to the terrain. Secondly, give workers safety education and take certain protective measures during operation. It is absolutely forbidden to climb scaffolding in rainy days, but the operation rhythm should be adjusted reasonably to prevent safety accidents.

Three, strengthen the greening project construction schedule control and investment management.

(A) strictly control the construction progress

1. Make preparations before construction.

Before the greening project construction, it is necessary to check the qualification of the construction unit and the position of management personnel, attend the first site meeting organized by the owner, fill in the application form for project commencement in time when the construction unit has the conditions to start construction, and organize the construction unit to start construction on time.

2. At the first site meeting organized by the main construction unit, fill in the project commencement application form in time when the construction unit has the conditions to start construction, and organize the construction unit to start construction on time.

To control the construction progress of chemical engineering, we must first examine whether the construction progress plan submitted by the construction unit is reasonable; Secondly, check and urge the construction unit to implement the progress plan in the construction process. When it is found that there is a big deviation between the actual progress and the planned progress, it shall assist the construction unit to analyze the reasons, such as objective reasons such as Party A's failure to hand over the working face or the influence of climate factors, or subjective reasons such as the slowdown of the construction unit's own workers, improper mechanical operation or the replacement of unqualified seedlings when they enter the site, and then take effective measures to adjust the plan. If it is caused by the construction unit, require the construction unit to rectify; If it is caused by Party A's reasons or unforeseen factors, it is necessary to negotiate with Party A or adjust the construction period accordingly, so as to make the progress conform to the actual situation of project implementation, try to meet the requirements of the total construction period stipulated in the contract and not delay the construction period.

(2) Strictly control the project investment.

In addition to schedule and quality control, another important task of supervision engineer is investment control. First of all, we should be familiar with the construction drawings and design requirements, and review the application for project payment submitted by the construction unit according to the actual progress of the project stipulated in the contract. Secondly, we should strictly control unreasonable items and close the signature. Thirdly, analyze the technical and economic rationality of the engineering design changes that affect the investment, carefully examine the increase and decrease of the resulting engineering cost and seek the owner's consent, especially the greening change projects that exceed the contract price, carefully examine the engineering quantity and unit price, and strictly control the engineering investment.

Four, strengthen the greening project completion acceptance control.

Greening plants are alive. After planting, they need at least one year of rooting, seedling extension, germination and branch growth to survive. Therefore, the acceptance of greening projects can only be carried out after a certain growth period to ensure the survival of plants. After the completion of the greening project, whether it meets the acceptance criteria can be handed over to the construction unit, mainly from the following aspects:

1. The survival rate of trees is over 95%;

2. The survival rate of trees in strong acid, strong alkali and arid areas is over 85%;

3. The survival rate of flowers and plants is over 95%, the lawn is free of weeds, and the coverage rate is over 95%;

4. Plastic trimming meets the design requirements;

There are many control points in greening project supervision, such as timely processing of engineering data, coordination and communication with all parties during construction, and control of ancillary facilities. I won't go into details here. In a word, as long as we master the construction characteristics of greening projects in practice and control them in strict accordance with the supervision procedures, we can do a good job in greening supervision.

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