Method for excavating subway station through middle steel pipe vertical columns

Abstract

The invention relates to the technical field of construction engineering, and discloses a method for excavating a subway station through middle steel pipe vertical columns. The method comprises the steps that after an upper step 1 and an upper step 2 are excavated, upper core soil is removed, reinforced concrete is poured on a foundation, bolts are pre-buried, steel supports are erected, the steel supports are connected with the foundation, movable heads are arranged, a square timber is erected above the movable heads, the steel supports are connected through angle iron, and after deformation is stable, the temporary steel supports are removed. The influence of perturbation on surrounding rock during blasting excavation is reduced, stress of the surrounding rock is released advantageously, construction processes are more optimized, deformation of the surrounding rock is better controlled, the defects that by adopting a traditional method, in rock column removing, the high-altitude operation safety risk exists, the construction difficulty is large, and the technology is complex are overcome, meanwhile, an upper step excavating process operation platform is fully utilized, thus the construction difficulty is lowered, construction operation is facilitated, segmented timely support is achieved, the operation circulation time is shortened, the tunnel excavating speed is effectively increased while safety is ensured, and the construction processes are reduced.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a method for excavating a steel pipe column in the middle of a subway station. Background technique [0002] With the progress of society and the continuous development of science and technology, the above-ground space resources are increasingly insufficient. Especially in large and medium-sized cities, due to the excessive occupation of ground space resources, the traffic, environment, and commerce of the city have been greatly affected. The vigorous development of urban subways has effectively relieved the pressure on ground traffic and facilitated people's travel. [0003] As the main component of subway traffic, the subway station has the characteristics of shallow buried depth, large span, and poor geological conditions. Under the condition that open-cut construction is not available, the construction method of double-side pilot pit and concealed excavation...

AI Technical Summary

Problems solved by technology

However, during the construction process, the construction of double-side pilot pits has the characteristics of safety risks of high-altitude operations during the removal of large-section station rock pillars, many excavation steps, and difficult organization.

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