Construction method of open cut of subway station

Abstract

The invention provides a construction method of open cut of a subway station. Firstly, jet-grouting piles are adopted to guard construction, and overlapping width between every two jet-grouting piles is one thirds of the diameters of the jet-grouting piles; then earthwork inside the subway station is openly cut; then the construction of subway station base plates, waterproof layers and subway station top plates is carried out; and finally, the earthwork is backfilled. Reinforced concrete grades of major structures of the subway stations are no less than C 30, reinforced concrete is admixed with an accelerating agent, the subway station base plates can be in flat surface structures and can also be in downwards convex structures, the subway station top plates are internally provided with ribbed stiffeners, the subway station waterproof layers are made of swell soil waterproof carpets, and diameters of the jet-grouting piles are no less than 1 meter; the subway stations can be in two-layer structures, the construction of middle floor plate layers can be carried out after the construction of the subway station base plates is carried out, and the construction of the subway station top plates can be carried out. The construction method can greatly increase the construction speed and save building cost and has good waterproof effect during construction and is also beneficial to smoothly carry out the construction.

Description

Technical field [0001] The invention belongs to the field of underground engineering construction, in particular to a construction method of a subway station. Background technique [0002] Underground space is a precious resource of mankind. Large-scale development of underground space is a natural product of human social and economic development to a certain stage. With the rapid development of my country's social economy, the comprehensive national strength has been increasing day by day, laying the economic and technological foundation for the development of underground space. In addition, dozens of large cities and megacities across the country have experienced more and more problems in environmental protection, transportation, land resources, and residential space through the continuous development of more than half a century, which has become a bottleneck for the sustainable development of modern cities. Scientific, orderly, reasonable and efficient underground space develo...

AI Technical Summary

Problems solved by technology

Using the traditional method mentioned above, once the earthwork in the wall is dug to the bottom, a large number of supporting steel pipes are used in the wall when excavating the earthwork, and the equipment consumption is large; the horizontal and vertical surfaces are intersected and interfere with each other; the working conditions are bad, the safety is poor, the work efficiency is low, and the construction period is long.

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