Compared with the traditional concrete inner bracing and steel bracing, the steel bracing of Shanghai strong foundation pit greatly improves the overall steel degree and stability of the supporting system, combined with the remote real-time monitoring system Thus, the foundation pit displacement can be effectively and precisely controlled, and the deformation of the foundation pit can be greatly reduced. The following is the construction process scheme of steel support for foundation pit of a project:

Fully cooperate with the construction according to the earthwork excavation progress of the main contractor. Follow the "Vertical layering,Longitudinal section,The general principle of "slotting support, first support and then digging, stratified excavation, no overdigging". The first tool steel support shall be made immediately after the earthwork is excavated to the elevation, and the prestress shall be applied.

1The construction sequence of foundation pit steel support is as follows:

Construction preparation→Earthwork excavation→Measurement positioning/Elevation control/review→Slotted construction leg, bracket, support beam→The first tool support installation construction→Application of prestress→Earthworks and support works are cycled until the foundation pit bottom→Pour concrete cushion, bottom plate and side wall→The structural strength of basement reaches the design strength→Layer by layer recovery tool support→The project is complete.

2For the installation of the tool-type combination inner supporting steel members in this project, firstly check the inner edge line and the clear space of the underground enclosure structure, and adopt the method of lifting in parts to lift the enclosing purlin, corner brace and fish belly beam, combined with the site excavation plan, according to the north-In the east-south-After the corrected bolt is tightened, jack installation and prestress application, steel strand installation and prestress are carried out successively, and then auxiliary fixation is carried out.

3, tool type combination of internal support construction sequence: 

Car crane and crawler crane are used for hoisting, and excavators are used for on-site installation and construction in the pit.

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