Foundation pit groove steel sheet pile profile steel supporting system and construction method

Abstract

The invention discloses a foundation pit groove steel sheet pile profile steel supporting system and a construction method. The supporting system comprises enclosure structures laid along the inner side wall of a foundation pit groove, an upper supporting structure arranged at the two ends of the opening of the foundation pit groove in a crossing mode and fixed to the side walls of the upper ends of the enclosure structures, and a plurality of lower supporting structures arranged below the opening and above the bottom of the foundation pit groove, and the two ends of the lower supporting structure are connected with the enclosure structures arranged on the two sides in the foundation pit groove; and the lower supporting structure comprises lower steel enclosing purlins and lower profile steel supporting beams, the multiple layers of lower steel enclosing purlins are arranged on the enclosure structures, the lower steel enclosing purlins are connected to the surfaces of the enclosure structures through bolts in the surrounding direction of the inner side wall of the foundation pit groove, and the multiple lower profile steel supporting beams which are parallel to one another are arranged in the width direction of the foundation pit groove. By means of the construction method, prestress can be effectively applied to the supporting system when the excavation depth of the foundation pit groove is large, deformation of the foundation pit groove can be better prevented, and it is guaranteed that the whole supporting system is evenly stressed.

Description

technical field [0001] The invention relates to the technical field of foundation pit construction, in particular to a foundation pit groove steel sheet pile steel support system and a construction method. Background technique [0002] With the rapid development of social economy and the shortage of urban land resources, deep foundation pit (trough) engineering has become a development trend of modern architecture. The stability of foundation pit (trough) itself and the safety of the surrounding environment have naturally become the concerns of all parties. focus. In the case of increasingly tense land resources, increasingly complex engineering geological conditions, and increasingly prominent environmental protection issues, traditional foundation pit (trough) support forms, such as grading excavation, bored piles, retaining walls + steel bars Concrete internal support, etc., can no longer meet market requirements. At present, in the construction process of deep foundati...

AI Technical Summary

Problems solved by technology

The purlins and horizontal supports of the support system used in the early days were connected by welding, the prestress could not be applied, and the deformation of the foundation pit (trough) could not be better controlled, and the welding was the main method, which resulted in large material loss, low turnover rate and poor construction quality. High, which will affect the construction progress and quality

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