Fabricated type concrete-filled steel tube supporting system and construction method thereof

Abstract

The invention belongs to the technical field of underground foundation pit engineering, and particularly relates to a fabricated type concrete-filled steel tube supporting system and a construction method thereof. The system comprises an enclosure structure and a fabricated type concrete-filled steel tube support; a top beam is arranged at the top of the enclosure structure; the fabricated type concrete-filled steel tube support is supported between two opposite sides of the top beam; the fabricated type concrete-filled steel tube support is formed by splicing a plurality of concrete-filled steel tube support prefabricated parts; supporting assemblies are arranged in the top beam; and the two ends of the fabricated type concrete-filled steel tube support are connected with the supporting assemblies on two sides through extensible connecting pieces respectively. The fabricated type concrete-filled steel tube support adopted in the supporting system is formed by splicing the multiple concrete-filled steel tube support prefabricated parts, the fabricated type concrete-filled steel tube support is detachably connected with the supporting assemblies in the top beam through the extensible connecting pieces, assembling and disassembling are convenient, and recycling of components is convenient; and the length of the end joint can be adjusted by the extensible connecting pieces.

Description

technical field [0001] The invention belongs to the technical field of underground foundation pit engineering, and in particular relates to an assembled steel pipe concrete support system and a construction method thereof. Background technique [0002] Traditional cast-in-place concrete supports are widely used in underground projects due to their advantages of high rigidity, good integrity, safety and reliability, but there are also prominent problems and shortcomings: (1) Expensive and high investment: concrete supports are temporary projects, The main body of the station structure is completed, that is, the external transport is broken, and the investment in temporary abandoned projects is high. Generally, underground stations amount to millions, and complex stations amount to tens of millions; (2) Time-consuming and long construction period: concrete support formwork, binding steel bars, pouring vibration Pounding, maintenance, and later demolition, the whole process las...

AI Technical Summary

Problems solved by technology

[0002] Traditional cast-in-place concrete supports are widely used in underground projects due to their advantages of high rigidity, good integrity, safety and reliability, but there are also prominent problems and shortcomings: (1) Expensive and high investment: concrete supports are temporary projects, The main body of the station structure is completed, that is, the external transport is broken, and the investment in temporary abandoned projects is high. Generally, underground stations amount to millions, and complex stations amount to tens of millions; (2) Time-consuming and long construction period: concrete support formwork, binding steel bars, pouring vibration Pounding, maintenance, and later demolition, the whole process lasts for several months, which seriously restricts the progress of on-site construction; (3) Laborious and difficult: the concrete support construction is difficult, and the demolition construction after use will consume a lot of manpower and material resources; (4) ) is not environmentally friendly, and concrete destroys waste residues to pollute the environment, which is not in line with the development direction of green construction, environmental protection and energy saving

[0003] Although the traditional steel pipe support can be recycled and the construction is more convenient, it can only bear the pressure between it and the support structure of the foundation pit, the integrity is poor, and the deformation resistance is poor, which has become a weak link in the safety of the foundation pit; For the standard length, there are always errors in the construction process

Images