Foundation pit supportingStructure of slope excavation, retaining type support structure, gravity type support structure, combined support structure. How to select the appropriate type of foundation pit supporting structure? The principle of foundation pit support is safety, economy and convenience for construction. On this basis, the following conditions should be comprehensively considered according to site geological conditions, foundation pit depth and function, construction conditions, environmental factors and regional engineering experience.

1Foundation pit depth;

2, soil characteristics and underground conditions;

3, foundation pit surrounding environment;

4, the main underground structure and foundation form and its construction method, the plane size and shape of the foundation pit;

5, the feasibility of construction technology of support structure;

6, construction site conditions and construction season;

7, economic indicators, environmental performance and construction period.

In addition to the above points, the selection of foundation pit supporting structure should also consider the treatment of groundwater, especially in sandy soil and silt soil, where the water buried shallow, rich water, sometimes in the lower aquifer also buried confined water layer, become an important factor affecting the stability of foundation pit.

Dewatering is needed during excavation of foundation pit in areas with high groundwater, and pumping groundwater for a long time will cause subsidence of the surrounding land. Therefore, when environmental conditions do not allow dewatering, water stop curtains should be set around the foundation pit to cut off the connection between the aquifer inside and outside the pit, so as to avoid the impact on the environment caused by dewatering in the foundation pit. Water stop curtain can choose underground diaphragm wall, cement soil mixing pile curtain wall or rotary jet grouting pile water stop curtain and other methods.

Foundation pit supportingDuring the design, the seepage stability of foundation pit should be checked, which is also an important content of groundwater control. It is necessary to prevent the influence of flowing sand, flowing soil, piping and confined water layer on the foundation pit bottom.

Shanghai strong Shantou Wanda 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. Focusing on the technical requirements of "excellent technology, reliable technology and fast construction", it is a solid enterprise providing comprehensive solutions such as land and water foundation engineering technical consultation and construction services for customers.Contact Number:400-1002850