Steel bar grating connecting structure for multi-arch underground excavation pipe gallery primary support structure and construction method

Abstract

The invention discloses a steel bar grating connecting structure for a multi-arch underground excavation pipe gallery primary support structure and a construction method. A steel plate is arranged onthe outer side of a steel bar grating of a first excavation bin at the connecting position of steel bar gratings of support structures of two adjacent bin primary to serve as an embedded connecting piece; the steel plate is welded with a steel bar grating main rib, and the plane of the steel plate is perpendicular to the connecting direction; anchor bars are arranged on the back of the steel plate, preformed holes and high-strength bolts are symmetrically arranged on the steel plate, the ends of one sides of the bolts are flush with the inner side of the steel plate, and the other sides of thebolts extend outwards to be reserved for being connected with steel bar grating connecting plates of adjacent bins; and two pieces of angle steel are arranged at a co-constructed connecting end partof a corresponding steel bar grating of a subsequent excavation bin, bolt holes are preserved in the angle steel at the positions corresponding to connection with the high-strength bolts, and the angle steel are rapidly and firmly connected with the steel plate as the preserved connecting piece. Compared with an existing construction method, according to the method, the construction progress can be effectively improved, the adjacent bins and an overall co-construction primary support are quickly closed to form a ring, the influence of excavation on a soil body is reduced, and the method has wide development and application prospects in multi-arch underground excavation construction.

Description

Technical field [0001] The present invention relates to a connection structure for the reinforcing grating of the dark privilege gheriff, and more particularly to a primary structure reinforcing structure for the joint form of the dark form, which is easy to might The chamber is connected to the reinforcing grid at the shared initial part. Background technique [0002] The integrated gallery is generally designed as a hydrocontrol, electric warehouse, gas bin and other multicolored form according to the use function. The corresponding hidden rejection segment is generally in the form of the initial joint arch structure, and when the adjacent bin room is interlaced. Taking the form of triple arch structure as an example, it is generally used to use the middle cave method. That is, the middle hole is opened and supported. It is then symmetrically digging the support of both sides of the edge, and the hole of the hole is always opposite the middle hole. That is a certain distance. T...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a connection plate design for the initial support structure of the underground excavation pipe gallery that facilitates the co-construction of the steel bar grid in the two adjacent warehouses, so as to solve the problem of the co-construction of the steel bar grid in the two warehouses proposed in the above-mentioned background technology. Difficult problems in the construction of the connection position

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