Lining supporting system for tunnel framing reconstruction tunnel bottom structure and construction method thereof

Abstract

The invention discloses a lining supporting system for a tunnel framing reconstruction tunnel bottom structure and a construction method thereof. The supporting system comprises an inverted arch lining, a primary support, steel flower tube lock feet, a blocking isolation wall and a pre-reinforcing pile, wherein the inverted arch lining and the primary support are arranged at the tunnel bottom, thesteel flower tube lock feet are driven into surrounding rock from side walls on the two sides, and the blocking isolation wall and the pre-reinforcing pile are positioned above and below a central ditch correspondingly; the inverted arch lining comprises two half-range inverted arch linings which are symmetrically arranged in the transverse direction of a tunnel; the primary support comprises twohalf-range primary supports which are symmetrically arranged in the transverse direction of the tunnel; and the pre-reinforcing pile is fixedly connected with the two half-range inverted arch liningsand the two half-range primary supports. According to the lining supporting system for the tunnel framing reconstruction tunnel bottom structure and the construction method thereof, the risk of framing reconstruction of the tunnel bottom structure in the operating state of the tunnel is reduced in the form of framing excavation and framing support, the operation time of reconstruction of the tunnel bottom structure can be not limited, the overhead reinforcing procedure of a steel cushion beam is omitted, interference to a track structure is reduced, and the construction progress in the operating state can be greatly improved on the premise of ensuring safety.

Description

technical field [0001] The invention relates to the technical field of reconfigured structures of operational tunnel engineering, in particular to a lining support system and a construction method for reconfigured tunnel bottom structures of tunnels by framing. Background technique [0002] The subrail structure of the tunnel is the most important part of the tunnel support system and operation system, and it is also the most serious part of the tunnel disease. According to research, before or after a period of operation in some existing railway tunnels, the sub-rail structures (including track slabs and inverted arch filling) have cracks and damages to varying degrees, which directly manifest as the uplift of the inverted arch, resulting in track irregularities. Smooth, very harmful, especially for tunnels using ballastless ballast bed, due to the extremely limited space for adjusting the track, the track heaving disease directly endangers driving safety. At present, the c...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a framing reconstructed tunnel for the problems existing in the prior art that the existing tunnel bottom structure is completely dismantled and reconstructed, the construction efficiency is low, and the track structure and line operation are greatly disturbed. Lining support system of bottom structure and its construction method

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