Municipal Engineering of North Passage in Shenzhen Big Industrial Zone
Supervision report of soil and water conservation project
I. Overview of major projects
The north passage of the big industrial zone is located in the north of the big industrial zone and south of Kengzi Street. The design starts from Danzi Avenue and ends at Shenshan Expressway. The total length of the road is about 2.7km, which is roughly north-south. The road grade is urban expressway. The main body is a two-way six-car road, and the ramp is a one-way two-lane road. The construction area of the project is 47.96hm2 and the responsibility area is 57.96hm2.
Second, the overall layout of soil and water conservation measures
According to Shenzhen Water Conservancy Planning and Design Institute's "Water and Soil Conservation Plan of Northern Passage Municipal Engineering", the comprehensive measures of combining engineering measures with biology are adopted for the prevention and control of water and soil loss in this project. The engineering measures are combined with the main engineering structure, mainly using tracer rods to strengthen the slope soil, using explosion-proof nets to prevent falling rocks and soil erosion, and using building materials to build retaining walls, flood drainage ditches, intercepting ditches and drainage ditches (temporary drainage ditches are set around each site during construction). , to prevent soil erosion directly on the bare land, causing soil erosion. Due to the large site, temporary drainage ditch was set up during the construction period, which greatly reduced the soil erosion during the construction period. Biological measures mainly adopt planting forest and grass to protect the exposed soil surface, and good ecological and landscape effects will be formed after the project area is completed. Specifically, it includes the following contents:
1. Slope engineering: the soil structure of the slope is fixed by tracer rods and reinforced concrete skeleton beams, the slope is afforested by explosion-proof nets and greening hanging nets, and intercepting ditches are set at the top of the slope, and drainage ditches are set on each platform of the slope to prevent the slope from being washed by water. Considering that a single grass species can easily lead to excessive loss of some nutrients, resulting in poor vegetation survival, this project chooses a variety of shrubs and grass species mixed planting to ensure soil nutrient balance, which is conducive to long-term ecological balance.
2. Earthwork: Because this project mainly carries out earthwork balance in the site and the project area is large, soil and water conservation during the construction period is the key supervision object of this project. In the process of earthwork excavation and filling, ensure the temporary drainage setting in the park. After each plot is leveled, orderly drainage will be carried out in the surrounding brick temporary drainage ditch, and finally it will be collected in the sedimentation tank and discharged into the municipal drainage box culvert after sedimentation.
3. Greening project: This project has a high greening coverage and a wide greening area. Temporary drainage ditch shall be set during the leveling construction of green earthwork, and the temporary drainage ditch shall be filled with soil for greening after the greening construction is basically completed.
Three, the basic situation of soil and water conservation project supervision
(1) Supervision basis
1. Policies, regulations, norms and standards of the state and the Ministry of Water Resources related to engineering construction: Soil and Water Conservation Law of People's Republic of China (PRC), Regulations on the Implementation of Soil and Water Conservation of People's Republic of China (PRC), and Code for Acceptance of Comprehensive Management of Soil and Water Conservation (GB/T 15773- 1995).
2, supervision contract and other supervision documents.
3, design drawings, design documents, design requirements and documents, etc.
4. Bidding documents and construction contracts.
(2) Supervisory bodies
Chief supervision engineer, supervision engineer and supervision personnel
(III) Contents of supervision work
Control the investment, duration and quality of engineering construction, manage engineering construction contracts, and coordinate the working relationship between relevant units.
(IV) Work flow of supervision
1, sign a written construction supervision contract with the project legal person;
2, the preparation of engineering construction supervision scheme;
3, according to the project construction schedule to develop project supervision rules;
4, undertake the supervision of the project construction stage, supervision institutions stationed in the construction site;
5. Carry out construction supervision according to the detailed rules of construction supervision;
6. Participate in the pre-acceptance of project completion and sign the opinions of construction supervision.
(V) Methods and measures of supervision work
1. When the project enters the construction stage, our company will set up an engineering supervision organization according to the specific conditions of the project, and send experienced supervisors to carry out supervision work.
2. Supervisors should keep close contact with the owner and the construction unit, pay attention to whether the project construction is normal, and ask each construction unit to designate a contact person to be responsible.
3, supervision personnel to do a good job of on-site supervision, supervision diary and on-site records.
4. Hold regular engineering meetings and regular meetings, coordinate and solve problems in the construction process, timely check the implementation of quality, progress and investment in the project implementation process, and coordinate the relationship between relevant parties to ensure the smooth progress of the project.
5. In case of engineering changes and visa problems, actively communicate with the owner and the designer, take flexible emergency measures, and make original visa records.
6. Manage, file and send and receive the project supervision documents for handover after completion.
7, according to the relevant provisions of the government for project completion settlement.
Four. Completion and effect of soil and water conservation measures
(1) The completion quantity of soil and water conservation engineering measures of the municipal engineering of the North Passage is:
1. Slope soil is reinforced by slope anchor and structural beam skeleton, with the size of 3m*3m and the depth of 6~ 12m. C25 concrete is poured. The section of reinforced concrete structural beam is 250× 300m, and C25 concrete is adopted.
2. The mortar drainage ditch is 1240m, and the specification is 500×500㎜.
3. Mud intercepting ditch 1400m, with specifications of 500×500㎜.
4. The mortar drip tank is 456 meters, and the specification is 400×600㎜.
5. Six temporary sedimentation tanks with specifications of 1000×2000× 1000㎜.
6. Mortar retaining wall is 254m3, with a top width of 300 and a bottom width of 500 ~ 2000m2.
(2) The quantity of biological measures for soil and water conservation in the municipal works of the North Passage is:
Arbor 1 1250, shrub 52666, vine 96 1, spraying area 0.48hm2, turf1.48 hm2, net spraying 2. 17hm2.
The water and soil conservation measures of the municipal engineering of the North Passage are strictly implemented in accordance with the construction drawings, and the specifications and standards also meet the design requirements. It has successfully passed many rainstorm tests, and has not caused obvious soil erosion. The effect of preventing soil erosion is excellent, and the prevention standard reaches the target value required by the design of soil and water conservation scheme. The excavated slope is stable, the drainage system works well and the greening effect is good. In plant measures, the survival rate of trees and shrubs is above 98%, and the preservation rate reaches 98%. Now all the vegetation is growing well.
Five, supervision experience and experience
1, assist the owner to deal with the relationship with the construction unit. Assist the owner to choose the construction unit with good quality and strong strength as far as possible, and formulate some specific measures for on-site management, such as "five-member" attendance system, written notice system and punishment regulations. , comprehensively strengthen the management of the construction site.
2. Deeply understand the design intent. Not only should we be familiar with the construction drawings and carry out the construction according to the drawings, but we should also understand and master some parts of the design field that are difficult to deepen according to the engineering situation. According to the design intent, urge the construction unit to formulate detailed construction plans for specific parts and adopt practical and effective solutions to achieve the best results.
During the construction supervision of the soil and water conservation project in the North Passage of Shenzhen Industrial Zone, all supervisors followed the working principle of "strict supervision, enthusiastic service, fairness and meticulous", closely cooperated with the supervisor, owner, design and construction unit, and strived to fulfill the supervision contract. Our company is grateful for the leadership and concern of competent departments at all levels, as well as the support and cooperation of relevant units.
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