Sectional steel brace-Prestressed fish-belly foundation pit steel support technology is based on the principle of prestress, through a large number of engineering research and practical application, aiming at the shortage of traditional concrete inner support and steel support, a new deep foundation pit support structure system is developed, based on the fish-belly beam, H Section steel as the force beam, Angle support, column, horizontal Beam, tie rod, triangular contact, prepressing jacking device and other standard components are combined to apply prestress, forming a plane prestressed support system and a three-dimensional structure system. Compared with the traditional concrete, the overall steel degree and stability of the support system are greatly improved. Combined with the remote real-time monitoring system, the displacement of the foundation pit is effectively and accurately controlled, and the deformation of the foundation pit is greatly reduced.
Compared with the brittle failure of traditional support system, the failure mode of prestressed fish-belly beam combination is ductile failure, which improves the safety of foundation pit support structure. In the process of foundation pit excavation,The construction SUPPORT structure of prestressed fish belly beam can ensure the safety of the supporting structure, control the deformation of the surrounding soil, and effectively protect the safety of the buildings (structures), municipal roads and pipelines around the foundation pit. In order to REALIZE THE effective monitoring of soil and water pressure ON the side wall of the foundation pit and the deformation of the enclosure structure, a multifunctional monitoring and alarm system is adopted to avoid the possibility of the damage of the supporting structure of the foundation pit.
The prestressed fish-belly foundation pit steel support system should be assembled in the order of prestressed fish-belly beam first, then support and Angle support. Construction technology:1.Measurement and positioning;2 . Column construction;3.Installation bracket, tow seat, joists;4 . Install waist beam, fish belly beam;5.Installation of support, Angle support;6 . Install force transmission parts;7.Installation quality inspection;8 .Apply prestress;9.Earthwork excavation, deformation, axial force monitoring, plus steel support prestressing; 10 .The prestress of steel support is released after the completion of brace change and force transfer;11.Remove and recycle steel supports.
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
