The foundation pit supporting construction unit needs to pay attention to the problem in the construction, the foundation pit supporting project is temporary is the most challenging difficulty in the construction project, but also the key to reduce the project cost and ensure the quality of the project. The foundation pit supporting construction unit should pay attention to the following matters in the construction process:
In general,Foundation pit supporting The project is temporary, the safety reserve of the supporting structure is relatively small, and the risk is large. At the same time, because of the complex construction technology of foundation pit supporting engineering, involving a wide range, changing factors, and frequent accidents, it is the most challenging difficulty in the construction engineering, but also the key to reduce the project cost and ensure the quality of the project. The foundation pit supporting construction unit should pay attention to the following matters in the construction process:
1, Excavation of foundation pit in soft soil, high groundwater level and other complex site conditions is easy to produce soil slippage, foundation pit instability, pile displacement, pit bottom heave, retaining structure serious water leakage, soil flow resulting in damage and other diseases, which poses a great threat to the safety of surrounding buildings, underground structures and pipelines.
2, To do a good job in foundation pit supporting engineering, it is necessary to do a good job in the whole process of excavation and supporting, including investigation, design, construction and monitoring work.
3, Foundation pit support engineering includes soil retaining support, waterproof, precipitation, excavation and many other closely related links, the failure of any link may lead to the failure of the whole project.At the same timeFoundation pit construction of adjacent sites, such as pile driving, precipitation, excavation and other construction links will have mutual influence and restriction, increase the accident inducing factors, so we should pay attention to The construction of the Every detail.
4, The construction cycle of foundation pit supporting engineering is long, from excavation to completion of all the projects below the ground, random factors affecting safetyA number ofThe occurrence of accidents is often sudden, emergency plans should be made .
5, The excavation and support of the foundation pit should be carried out according to the sequence and parameters specified in the design, and the excavation should be stratified, segmented, time-limited and balanced.
6, Foundation pit supporting The structure should be in the concrete to meet the design requirements of strength, and in the anchor rod (cable), steel support according to the design requirements of prestressed, can be excavated the lower earthwork, it is strictly prohibited to advance excavation and overdigging.
7, During the construction process, it is forbidden for equipment or heavy objects to collide with support, waist beam, anchor rod and other supporting structures of the foundation pit. It is also forbidden to place or hang heavy objects on the supporting structure of the foundation pit.
8, When removing the supporting structure.The foundation pit should be removed layer by layer in the order of backfilling from bottom to top, and the reinforcement measures should be taken when necessary.
9, When internal support is used in foundation pit support, it should be constructed in the order of first support, then digging, first support, then removal. The order of removal and replacement of support should meet the requirements of design working conditions, and should be combined with the monitoring results of internal force and deformation of the site support structure.
10, The inner support shall be removed symmetrically after the concrete of the beam, plate, column structure and the replacement structure in the pit reaches the strength required by the design.
11, After the foundation pit excavation and support is completed, the underground structure and installation should be carried out in timetheThe construction. During the construction, the stability of the pit wall should be checked at any time. The foundation pit bottom should be full of matting layer, close to the enclosure structure.
Shanghai strong foundation foundation Guangzhou Metro Control Center foundation pit project
Shanghai Qiangqiang Foundation Engineering Co., LTD. 's business covers foundation pit engineering, pile foundation engineering, land and waterFoundation treatment, slope treatment and other engineering fields. around"Excellent technology, reliable process, fast construction" technical requirements, is to provide customers with land, water foundation engineering technical consultation, construction services and other comprehensive solutions of the entity enterprise. Contact Number:400-1002850