A kind of excavation and reverse construction method for pipe curtain cover used in subway station construction

Abstract

The invention discloses a pipe screen cover excavation and reverse construction method for construction of a subway station. First, the right line or the left line of the subway station is excavated by using the cover excavation method; the right line or the left line of the subway station is covered and dug to a predetermined position Finally, the pipe curtain is jacked from the excavation line to the unexcavated line to form the shed structure; the soil under the shed structure is excavated to provide a working surface for the construction roof; after that, the construction method of cover and excavation is used to construct each floor of the station in sequence Slab girder; the present invention utilizes the supporting function of the horizontal pipe curtain structure to realize the bearing of the dead load of the soft soil of the water-rich sand layer above the horizontal pipe curtain structure and the live load of traffic and pedestrians, and at the same time, it can realize the complex underground in the overlying soil The effective avoidance of pipelines avoids the inconvenience caused by excessive occupation of the ground to pedestrian traffic.

Description

technical field [0001] The invention belongs to the technical field of engineering, and in particular relates to an excavation and reverse construction method for a pipe curtain cover used in the construction of a subway station. Background technique [0002] At present, in the construction of subway stations, the common methods include open-cut method, cover-excavation method, mine method and reverse method. There are many constraints in the construction of urban subway stations. For example, if there are important buildings on the ground, the ground settlement caused by construction must be strictly controlled. There are many existing underground pipelines that cannot be damaged, and the ground traffic is too heavy to be excessively fenced. Therefore, when choosing a construction method for the construction of a subway station, there will be many problems. For example, using the open-cut method will cause traffic congestion and affect the surrounding environment. Simply us...

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Problems solved by technology

[0003] Aiming at the technical problems existing in the prior art, the present invention provides a construction method for pipe curtain cover digging and reverse construction for the construction of subway stations, so as to solve the traffic congestion caused by the open cut method in the prior art and the influence on the surrounding environment. Simply adopting the reverse method is low in construction efficiency and cannot avoid important pipelines, and the technical problems of using the pipe curtain method and the pipe jacking method require a large working space

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