Half-cover excavation construction structure and method suitable for urban rail transit underground station

Abstract

The invention discloses a half-cover excavation construction structure and method suitable for an urban rail transit underground station. The structure structurally comprises a fence used for protecting a station base pit construction area and arranged on the surrounding area of a to-be-built underground station base pit, a dewatering well and a fence column vertically dug into stratum from the ground along the periphery of the underground station base pit in the range of the fence, the dewatering well is arranged at the construction area away from the base pit, the fence column is arranged atthe construction area close to the base pit, and a water draining ditch in the ground is arranged between the dewatering well and the fence column. According to the structure, the construction process and difficulty of the underground station are reduced, the risk of station construction is reduced, the relocation of an existing underground pipe in the influencing range of the station construction is further facilitated, laying and protecting of new-built urban underground pipe are facilitated, and the structure has the advantages of being simple in station structure, less in pipe relocationprocess, low in construction difficulty, relatively lower in manufacturing cost and wide in use range and the like.

Description

technical field [0001] The invention relates to the technical field of urban rail transit underground station construction, in particular to a half-cover excavation construction structure and method suitable for urban rail transit underground stations. Background technique [0002] At present, major cities at home and abroad are planning and building urban rail transit represented by subways and light rails in order to alleviate the growing pressure of urban public transport passenger flow. When building a rail transit underground station in an urban public transportation area with a large passenger flow and dense ground buildings, the station location selection is often affected by the existing buildings and traffic flow on the ground. Especially in the construction of urban rail transit underground stations such as subways and light rails in urban areas where the ground traffic flow is large and the ground resources cannot be occupied for a long time, the cover-excavation ...

AI Technical Summary

Problems solved by technology

However, setting up temporary columns or temporary vertical support systems in the foundation pit of the station to support the temporary pavement or cover plate not only increases the difficulty of underground station construction, but also increases the construction process of the station, resulting in the construction difficulty of the underground station and The risk is extremely high; in addition, according to the load transfer characteristics of the station, after the columns in the main structure of the station are poured, the temporary columns or temporary vertical supports previously set in the foundation pit are often removed and discarded, which will undoubtedly cause construction materials. waste and increased personnel costs, resulting in low construction efficiency and high cost of underground stations

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