1, design basis
1. 1 XXX project feasibility study report.
1.2 "Provisions on the Depth of Design Documents for Municipal Public Works" (Ministry of Construction, March 2004).
2. Design data and description.
2. 1 design data
2.1.1xx1:500 strip topographic map;
2. 1.2 The seismic fortification intensity is 7 degrees, and the design ground motion peak acceleration is 0. 10S.
2.2 Adoption of specifications
2.2. 1 Code for Design of Outdoor Drainage (GB500 14-2006)
2.2.2 Code for Construction and Acceptance of Water Supply and Drainage Pipelines (GB50268-2008) 2.2.3 Code for Structural Design of Water Supply and Drainage Pipelines (GB 50332-2002). 2.2.4 concrete and reinforced concrete drainage pipes (GB/T11836-1999).
3. Project overview
The project construction site is located on both sides of xxx highway, * * * * * * *, and new drainage trunk and branch pipes are built on both sides of xxx highway.
The drainage pipeline starts from K0+000 in the east and is laid from east to south. The water in the main pipeline is discharged into the river downstream of the highway, and the branch pipes are discharged into the channel. The total length of the main drainage pipe is 738. 7m, the length of drainage branch pipe is 463.56m, the length of connecting pipe is 97.7m, and the whole pipeline is slotted.
This project is designed according to gravel cushion and no groundwater.
4. Design parameters:
The displacement is calculated as 80% of the water supply of 5 1.6m 3/d, and the total displacement is 41.28m3/d.5. Description of the construction drawing:
5. 1 unit: elevation and distance are in meters, and the rest are in millimeters.
5.2 Pipes and joints: reinforced concrete pipes are used as pipe materials, and rubber ring joints are used as pipe joints. See details.
5.3 inspection wells:
Φ1000 round brick convergent drainage manhole is used for inspection wells. See details. 5.4 Pipeline foundation: 90 concrete foundation is adopted for slotting construction. See details.
5.5 manhole cover: the Ф1000 mm circular drainage manhole adopts cast-in-place cover cover. See Qing 02S3 for details.
5.6 Rain mouth: The rain mouth adopts brick flat grate double grate rain mouth. See details.
The depth of the rain outlet is H ≤1.0m. The connecting pipes are all d300mm, and the slope of I is greater than or equal to 0.0 1. The rainwater connecting pipe adopts 90 concrete foundation. See details. The inner wall of Yushuikou well is plastered with 1:2.5 cement mortar, 5% waterproof agent and 20 mm thick.
5.7 around the inspection well and the rain mouth, backfill with 3:7 lime soil, with a range of 50cm (ring), and backfill to the road structure layer, with a compactness of ≥95%.
5.8 During the construction process, except for the starting well, inflection point well and inspection well marked with coordinates at the intersection, the remaining wells are constructed according to the principle of not cutting off the pipeline and can be moved appropriately according to the actual situation.
5.9 Before construction, the existing pipeline elevation shall be re-measured, and the design shall be informed in time if there is any error. Underground pipelines along the project must be further investigated to avoid unnecessary losses during construction. If there is any contradiction with the design pipeline, please inform the designer in time.
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5. In case of groundwater during the construction of10, dewatering measures should be taken.
5. 1 1 The selected standard drawing shall be constructed according to its general description, drawing description and construction drawing design description. The construction quality and acceptance criteria should be strictly in accordance with the national standard Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering (GB50268-2008) and refer to the pipeline installation work instructions formulated by pipeline manufacturers.
5. 12 drainage outlet: As the drainage pipeline on the left side of Huang Gui Highway in this project discharges into the river, the drainage outlet is brick-shaped, and the blue 02S3 brick-shaped drainage outlet is selected. 6, construction safety precautions
6. 1 Before construction, the project should do a good job in construction organization design, strictly abide by the current relevant national safety technical regulations and documents, and formulate special safety protection management systems and measures according to the characteristics of this project to eliminate potential accidents.
6.2 The construction site shall be fully enclosed, and the site shall be fenced to prevent the entry of idle personnel. Areas belonging to dangerous operations should be clearly marked and watched by special personnel when necessary.
6.3 When multiple units cooperate in the construction at the same site, the general contractor and relevant units shall jointly agree on the safety work system and abide by it.
6.4 Fences or protective baffles should be set up in dangerous parts such as ditches, pits, pools, wells and various reserved holes in the site, and danger signs should be set up and closed as much as possible.
6.5 All scaffolding or scaffolding, protective facilities, safety signs and warning signs, etc. After erection, it shall not be dismantled without authorization. If it needs to be dismantled, it must be approved by the person in charge of on-site construction.
6.6 Don't walk on the dismantled formwork to prevent nail damage and formwork from falling and hurting people. 6.7 When excavating pipe trench, safety support shall be provided. 7, construction environmental protection matters needing attention
7. 1 Strictly abide by the national environmental protection laws and regulations, try to keep the original state of green plants and trees in the ecological environment outside the construction area according to the contract, and try to protect the trees and vegetation in the construction area.
7.2 Formulate environmental protection management regulations to protect and improve the living environment and ecological environment of the construction site. The general principles and requirements of civilized construction of engineering projects are: everyone is responsible for civilized construction; Responsible for the division of labor, step by step supervision; The site is neat and orderly; Create a safe, clean and orderly construction environment and conditions to meet the needs of modern management.
7.3 Road construction should be cleaned and watered regularly to reduce dust flying. Cement, lime, fly ash and other fine-grained materials that are easy to fly in the open air should be covered with mats to prevent flying and loss of pollution.
7.4 A fence with uniform style should be set around the road construction scope, and standardized site construction should be fully implemented.
7.5 Take effective control measures for the construction machinery that produces noise and vibration to reduce noise nuisance. During construction, except for emergency repair, equipment with high noise and vibration shall not be arranged for construction at night (from 22: 00 to 6: 00 the next day). 8, the main drainage engineering quantity table
List of main engineering quantities
No. Name Specification Standard Drawing Quantity Unit Remarks 1 Drainage Supervisor dn300 738.7
Drainage branch dn300 463.6 m 3
Circular brick drainage inspection well φ 1000
25 4 brick flat grate double grate rain mouth 50 5
Brick splayed drain
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