A construction method for building underground structures with large-diameter pipe jacking combined with hole piles

Abstract

The invention discloses a new construction method for large-diameter pipe jacking combined with tunnel piles to build underground structures. An open-cut foundation pit is used to excavate a guide hole. The steel pipe is jacked up and the soil above the steel pipe is injected at the grouting hole reserved for the steel pipe. slurry; welding of the internal lateral support of the steel pipe, construction of the bottom plate, steel pipe columns and roof, side guide tunnels, manual digging of piles and pouring of crown beams; adjacent steel pipes are longitudinally slotted at a distance and steel plates are welded to form transverse penetrations; reinforced concrete Beams or steel beams form initial support; excavate the first floor, cut excess steel pipes and weld steel plates to connect adjacent steel pipes; excavate to the middle plate and pour the middle plate and side walls; excavate the second floor and carry out the bottom plate and side wall construction; finally the gap in the guide tunnel is filled with plain concrete. This construction method is used for underground structure construction. Steel pipes, beams and manually dug piles are used to support the soil, enabling large-section excavation, reducing the impact of underground structure construction on surrounding buildings and the environment, and at the same time saving costs and reducing work.

Description

technical field [0001] The invention relates to the field of underground engineering construction, in particular to a construction method for constructing an underground structure by combining large-diameter pipe jacking with hole piles. Background technique [0002] The pipe curtain construction method was first used in Japan to build a passageway project across the railway. The first use of the pipe curtain construction method in China was in the construction of an underground passage in a city in Hong Kong. After many years of domestic research and successful implementation in engineering, the pipe curtain construction method has matured. However, due to the small diameter of the traditional pipe curtain structure, the construction inside the pipe is difficult, and the transverse rigidity between the pipes is relatively weak, which makes it impossible to excavate a large section. Stability, resulting in slower construction progress. Most of the transverse sections are a...

AI Technical Summary

Problems solved by technology

However, due to the small diameter of the traditional pipe curtain structure, the construction inside the pipe is difficult, and the transverse rigidity between the pipes is relatively weak, which makes it impossible to excavate a large section. Stability, resulting in slower construction progress

Most of the transverse sections are arch structures, and the space utilization rate is low

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