Dismounting and replacing construction method for inverted arch of floor heave section of high-speed rail tunnel.

Abstract

The invention relates to the technical field of high-speed rail tunnel construction, and particularly relates to a dismounting and replacing construction method for an inverted arch of a floor heave section of a high-speed rail tunnel. The method comprises the following steps that S1, a track is dismantled, fasteners are collected and picked up, and equipment protection of a dismounting and replacing section is conducted; S2, a ballast bed is cut by a disc saw; S3, the ballast bed is hoisted to a slag yard, specifically, the whole cut ballast bed is hoisted to a flat plate transport vehicle through an excavator and is cleared and transported to a waste slag yard outside the tunnel; S4, a trestle is erected, and specifically, the trestle is erected on the excavation section in a suspended mode; S5, the side wall is reinforced with an anchor rod; S6, drainage ditches on the two sides and an inverted arch filling layer at the end are cut; S7, side wall joint cutting is conducted, and an arch frame is installed; S8, the inverted arch, the ditches and the filling layer are chiseled away and excavated; S9, base concrete spraying construction is conducted; S10, a waterproof layer is installed, reinforcing steel bars are installed in a bound mode, and concrete is poured; S11, ditch cable troughs on the two sides and a ballastless track bed plate are recovered; and S12, the next inverted arch replacement section is constructed. According to the method, the inverted arch dismounting and replacing efficiency is high, and the working intensity is relieved. The method is mainly applied to dismounting and replacing of the inverted arch of the tunnel floor heave section.

Description

Technical field [0001] The present invention relates to the field of high-speed rail tunnel construction technology, and more particularly, it is related to the construction method for reaching the tunnel section of the high-speed rail tunnel. Background technique [0002] With the continuous development of China's high-speed rail, the continuous defects and diseases of tunnels have caused great threat to the normal operation of high-speed rail lines. Tunnel bottom drum disease is one of the tunnel diseases, usually takes an old chasting of the original damage to the deformation, re-laid the new concrete cant arch structure. The tensile difference of the torch removal section caused a certain deformation of the two liner, and the re-arch removal section will lead to limited construction site, the mechanical operation is small, the intensity of artificial operation is large, and the pressure during construction is huge. [0003] Analysis of the problems encountered by the existing...

AI Technical Summary

Problems solved by technology

If the demolition section of the inverted arch is too long, it will cause certain deformation effects on the secondary lining structure. If the demolition section of the inverted arch is too short, the construction site will be limited.

[0003] The problems encountered in the renovation and replacement of the inverted arch in the existing tunnel floor drum are analyzed and summarized, which are mainly manifested in the following aspects: the construction period of the disease treatment is short, there are many operating procedures, there is great interference between each other, the construction time is too long, and the on-site construction period is difficult. meet the requirements

The space in the tunnel is limited, the operation of mechanical equipment is inconvenient, and the construction efficiency is greatly reduced

The labor intensity of personnel work is high, the construction efficiency is low, the cost is high, and the working environment is poor

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