Construction method of connection point of socket-type open and concealed excavation structure door interface

Abstract

The invention provides a construction method for the connection point of the portal interface of a socket-type open and concealed excavation structure, which includes the following steps: Step 1, reserve the portal interface: before the construction of the end wall of the open and concealed excavation station, according to the design drawings, the excavation is carried out in advance The size of the portal interface is measured and set out. The reserved size of the portal interface is the outer contour size of the initial support of the underground excavation; Step 2, setting up the concrete shear groove and the steel bar connector: reserve the concrete shear groove inside the portal interface, At the same time, reserve vertical steel bar connectors; Step 3, pre-buried mid-buried rubber waterstop; Step 4, breaking piles and excavating into the hole and construction initial support and second lining; Step 5, reserving the interface structure of the portal construction. The present invention can simply and economically solve the problems of complex construction procedure, difficult waterproof construction, poor waterproof effect and poor integrity of the underground excavation structure existing in the traditional construction method. Play a better role in the construction process.

Description

technical field [0001] The invention belongs to the technical field of underground construction engineering, and in particular relates to a construction method for a connection point of a portal interface 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 base 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 must be left at the interface between the main structure of the open and concealed excavation of the station and the section, and the interface between the entrance and exit excavation structures. ...

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Problems solved by technology

[0005] In view of this, the present invention aims to propose a construction method for the connection point of the interface of the 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 problem of 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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