Lining construction seam anti-cracking lap joint structure and construction method

Abstract

The invention provides a lining construction seam anti-cracking lap joint structure and a construction method and belongs to the construction field of railway tunnels, especially high-speed railway tunnels. The structure includes a lining trolley main framework, a supporting table is fixed to the tail part of the lining trolley main framework, the upper end face of the supporting table is parallelto the upper end face of the lining trolley main framework, and the upper end face of the supporting table is lower than the upper end face of the lining trolley main framework. Rubber strips are laid on the upper end face of the supporting table, and the thickness of each rubber strip is greater than the height difference between the supporting table and the upper end face of the lining trolleymain framework. The structure aims at solving the problems that during existing rigid lap joint of tunnel lining construction seams, cracks are easily generated on the construction seams, the trafficsafety is seriously threatened after a tunnel is put into use, main frameworks of the upper ends of trolleys are in rigid lap joint with poured concrete, the lap joint parts are not compact, leakage of slurry easily happens, the rigid lap joint can cause deformation of the main frameworks of the upper ends of the trolleys, and correspondingly faulting of slab ends on the lap joint parts are caused.

Description

technical field [0001] The invention relates to a lining construction joint anti-crack lapping structure and a lining construction joint lapping construction method, belonging to the field of railway tunnel construction, especially high-speed railway tunnel construction. Background technique [0002] Today, with the vigorous development of national economic construction, high-speed railway has become an important driving force for economic development, and high-speed railway transportation has also become an important mode of transportation for national travel. Tunnel engineering is an indispensable part of high-speed railways. In recent years, many linings have fallen off, which has brought extremely high risks to the safe operation of high-speed railways. [0003] At present, the secondary lining of the tunnel is poured by hydraulic lining trolley, and the following conditions exist during the construction process: [0004] 1. The longitudinal and transverse construction ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide an anti-crack lap joint structure and construction method for lining construction joints, so as to solve the problem that the hard lap joints of existing tunnel lining construction joints easily lead to cracks at construction joints, which seriously threatens driving safety after being put into use. , the main formwork at the upper end of the trolley is hard-lapped with the poured concrete, the lap joints are not dense, and grout leakage is easy to occur, and the hard lap joints will cause deformation of the main formwork at the upper end of the trolley, resulting in problems such as misplacement at the lap joints

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