Post-doing construction method for tunnel connection section structure of subway station

Abstract

The invention belongs to a subway station tunnel connecting section structure post-constructed-type construction method which comprises the steps of level measurement, primary-support inverted arch section grille arching mounting, primary-support inverted arch concrete construction and waterproof laying, secondary-lining inverted arch construction, arch wall steel bar binding, additional groove section formwork erecting, additional groove section concrete pouring, additional groove connecting section waterproof construction and concrete backfill construction. The bottom of a great ascent opencut foundation pit serves as a material field, meanwhile construction of a station and a subway running tunnel communicating with the station is conducted, then post-constructed-type construction of asubway station tunnel connecting section structure is conducted, the tunnel construction progress is accelerated, the difficult problems of cross construction and mutual interference of the station and the tunnel are avoided, discharging openings are prevented from being reserved in the station, and the integrality and anti-seismic safety of the station are improved; and the subway station tunnelconnecting section structure post-constructed-type construction method can solve the difficult problem of narrow space construction effectively, and has the advantages of being safe, reliable, low incost, convenient to operate, low in construction risk, capable of shortening the construction period and good in using effect.

Description

technical field [0001] The invention belongs to a post-doing construction method for the tunnel connection section structure of a subway station. Background technique [0002] At present, the construction of urban rail transit is in the ascendant, and the construction technology of subway stations and tunnels has also been greatly developed. Urban rail transit is constructed in a complex environment, such as building an urban subway station in a downtown area, the surrounding environment is complex, the available construction land space is small, and it is difficult for large machinery to operate on the ground. In particular, the construction stage from the subway running tunnel formed by the tunnel shield machine to the subway station is carried out in the downtown area of ​​the city. The existing construction method of this construction stage is to first carry out the construction of the station tunnel connecting section from the running tunnel to the subway station, Then...

AI Technical Summary

Problems solved by technology

The construction of urban rail transit is in a complex environment, such as building an urban subway station in a downtown area, the surrounding environment is complex, the available construction land space is small, and it is difficult for large machinery to operate on the ground

In particular, the construction stage from the subway running tunnel formed by the tunnel shield machine to the subway station is carried out in the downtown area of ​​the city. The existing construction method of this construction stage is to first carry out the construction of the station tunnel connecting section from the running tunnel to the subway station, Then carry out the construction of the subway station; that is, the construction method of the structure of the station tunnel connection section first. This traditional method has the following two problems: (1) the station and the station tunnel connection section tunnel cannot be constructed at the same time, and can only be carried out sequentially. For projects with a tight construction period, the planned construction period cannot be met, resulting in large losses; (2) The construction process is complicated, the quality control is difficult, and the construction quality is difficult to meet the standards; (3) The equipment and raw materials required for construction have no place to store, and the construction cost is high

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