Construction method for connecting point of sleeve-connected tunnel connector of open and underground excavated structure

Abstract

The invention provides a construction method for a connecting point of a sleeve-connected tunnel connector of an open and underground excavated structure. The construction method comprises the following steps of S1, reserving the tunnel connector: carrying out staking out in survey on the connector dimension of an open and underground excavated tunnel in advance according to a designed drawing before end wall construction of an open excavated station, wherein the reserved dimension of the tunnel connector is an outer contour line dimension of an underground excavated initial support; S2, arranging a concrete shear groove and a reinforcing steel bar connector: reserving the concrete shear groove in the inner side of the tunnel connector and meanwhile, reserving a vertical reinforcing steelbar connector; S3, pre-burying a middle buried rubber waterstop; S4, breaking a pile and excavating the tunnel and constructing the initial support and a second liner; and S5, carrying out construction in a reserved tunnel connector structure. The construction method can solve the problems that a conventional construction method is complex in construction step, hard in waterproof construction, relatively poor in waterproof effect and poor in integrity of the underground excavated structure simply and economically. The construction method is simple to operate and easy to implement in construction, and is expected to play a relatively good role in a future metro construction process.

Description

technical field [0001] The invention belongs to the technical field of underground construction engineering, and in particular relates to a method for constructing a joint connection point of a socket-type open and concealed excavation structure. Background technique [0002] In recent years, my country's urban subway construction has developed rapidly, and the number of cities in operation has continued to increase. Since the design reference period of the underground structure of the subway is 100 years, the requirements for its structural durability and use safety are very high. In the construction process of the subway project, due to the influence of the construction steps of the envelope structure and the open and concealed excavation structure, construction joints should be left at the interface between the main structure of the open and concealed excavation of the station and the section, and the interface of the entrance and exit excavation structure. The most criti...

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Problems solved by technology

[0005] In view of this, the present invention aims to propose a construction method for the interface connection point of the socket-type open and concealed excavation structure, which can simply and economically solve the problems of complex construction procedures, difficult waterproof construction and poor waterproof effect in traditional construction methods. As well as the poor integrity of the underground excavation structure, this construction method is simple to operate and easy to implement during construction, and is expected to play a better role in the future subway construction process

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