Parallel construction method for shield arrival tunnel portal ring beam and shield crossing station

Abstract

The invention relates to the field of tunnel shield construction, in particular to a parallel construction method for a shield arrival tunnel portal ring beam and a shield crossing station. According to the parallel construction method for the shield arrival tunnel portal ring beam and the shield crossing station, the problems of long construction period and high cost because tunnel portal ring beam construction is carried out after the shield tunnel of the traditional station is finished are solved. The parallel construction method for the shield arrival tunnel portal ring beam and the shield crossing station comprises the following steps of: reserving a pump pipe on a middle plate and a top plate of the station; during shield arrival, carrying out secondary after-grouting to the back of a pipe piece by polyurethane; cancelling zero ring pipe piece splicing; after a shield tail leaves the tunnel portal ring beam, overlaying I steel on tunnel portal ring steel; welding a steel plate on the I steel; erecting a groined type rack platform on the tunnel portal steel ring; binding the tunnel portal ring beam reinforcing steel bar; installing an annular template and an end tip template; and directly pouring tunnel portal ring beam concrete by a station embedded pump pipe. Tunnel portal ring beam and shield tunneling can be synchronously carried out, and the influence on the shield tunneling by the tunnel portal ring beam construction is avoided. The parallel construction method for the shield arrival tunnel portal ring beam and the shield crossing station has the advantages of simple technology, advanced technology, flexible working procedure regulation, no construction interference and favorable economic benefit and social benefit.

Description

technical field [0001] The invention relates to the technical field of tunnel shield construction, in particular to a parallel construction method of a ring beam of a shield receiving portal and a shield passing station. Background technique [0002] With education and household registration management causing more and more urban residents, and the traffic congestion caused by people traveling by car, most developed second-tier cities are now starting to build subways. However, due to the particularity of shield tunneling construction, it is necessary to install a portal ring beam at the end of the shield tunnel at the station, which requires a temporary hoisting opening to be reserved for the station construction to remove the shield receiving zero ring. After the station, a track was laid at the bottom of the steel ring of the portal for battery vehicles to transport construction materials such as segments, synchronous grouting slurry, grease, etc., and to transport shiel...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of long construction period, high cost and uncontrollable quality in the construction of the door ring beam after the completion of the existing station shield tunnel, the present invention provides a parallel construction method for the shield receiving door ring beam and the shield passing through the station

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