Shield vertical shaft assembling type concrete-filled steel tube inner support system and construction method thereof

Abstract

The invention relates to a shield vertical shaft assembling type concrete-filled steel tube inner support system and a construction method thereof and belongs to the technical field of shield vertical shaft inner support. The system comprises multiple layers of concrete-filled steel tube inner support frames. Each concrete-filled steel tube inner support frame is spliced by four kinds of rectangular concrete-filled steel tube components including standard rectangular concrete-filled steel tube straight supports, rectangular concrete-filled steel tube straight corners, rectangular concrete-filled steel tube tee joints and rectangular concrete-filled steel tube short connection straight supports. Fast component connection is completed by high-strength bolts. Each component is formed by filling micro-expansion concrete into steel tubes with rectangular sections. Assembling construction of the inner support system is achieved, the problems that steel support is poor in overall stability and small in rigidity and has internal rust are solved, the problems that concrete support is complex in construction and high in manufacturing cost are solved, and the concrete-filled steel tube inner support system is good in integrity and reusable, and capable of strictly controlling structural deformation.

Description

technical field [0001] The invention relates to a shield shaft assembled concrete-filled steel tube inner support system and a construction method thereof, in particular to a reusable steel tube concrete inner support system with good integrity, which can strictly control structural deformation, and belongs to the shield shaft inner support support technology. Background technique [0002] At present, the development of underground space has become an indispensable part of urban construction. There are more and more applications of shield tunneling. Steel support and concrete support are widely used in the construction of shield shaft engineering. The main problems in the application process of steel support are: the connection between the steel support and the waist (crown) beam is not reliable, and the overall stability is poor; the steel support has a small rigidity, and when the foundation pit span is large, the steel support will be unstable due to excessive deflection ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the existing shield shaft engineering support technology, the present invention provides a shield shaft assembly type concrete filled steel pipe inner support system and its construction method

It can effectively solve the problems of poor overall stability, low rigidity and internal corrosion of steel supports, and can also effectively solve the problems of complex construction and high cost of concrete supports

Images