Method for shield expanding construction of subway station

Abstract

The invention provides a method for shield expanding construction of a subway station. Working pipes are constructed at the two sides of a shield tunnel by means of the pipe jacking technology, and soil deformation is reduced in the construction process; shield segments are connected with the working pipes to serve as a top supporting pipeline by means of the curved pipe jacking method in a tunnel, a subway station top supporting structure can be formed through one-time excavation, and the construction process is simpler; finally, concrete is injected into the top supporting pipeline, the working pipes and vertical supporting pipes to form a supporting structure for the whole station, and then the shield segments are detached and a second lining of the station and an accessory structure are constructed. The method has the advantages that construction efficiency is high, the process is simple, the influence of station excavation on city environment is reduced greatly, shield subway construction efficiency is improved, construction cost is reduced, the method is adaptable to the shallowly-buried and complicated geological condition of a city, the subway station constructed with the method is high in structural strength, and supporting is safe and reliable.

Description

technical field [0001] The invention relates to a method for expanding a shield construction subway station, and belongs to the technical field of trenchless underground engineering. Background technique [0002] With the development of our country's economy and the improvement of urbanization level, the traffic problem has become a key problem restricting the development of cities and needs to be solved urgently. As an important part of the urban public transportation network, the shield tunneling subway plays a huge role in alleviating traffic congestion, increasing the speed of urban development, and improving the modernization level of the city. However, due to the short distance between shield tunneling intervals and the large number of stations, shield tunneling often has to wait for the station to be completed before transferring, resulting in excessive excavation time and low utilization of shield tunneling equipment, resulting in delays in the construction period an...

AI Technical Summary

Problems solved by technology

There are many construction joints in the cover-excavation slab wall and column, which need to be waterproofed, which is inconvenient to excavate, low in work efficiency, and slow in construction speed

The construction period of the underground excavation method is long, the subsidence of the ground has a great impact on the safety of adjacent buildings, the construction risk is high, and the project cost is also high

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