Construction method for changing monolithic track bed to floating slab track bed in subway operation line tunnel

A construction method and technology of integral ballast bed, applied in the direction of road, track, ballast layer, etc., can solve the problem of no design and construction precedent, etc., and achieve the effect of ensuring the construction process and low noise

Active Publication Date: 2015-05-20
CHINA TIESIJU CIVIL ENG GRP CO LTD
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Problems solved by technology

[0002] In the bustling area of ​​the urban area, close to residential areas and commercial areas, in order to reduce the interference of trains in the process of driving, it is necessary to destroy the overall track bed in the existing tunnel and transform it into a floating slab track bed. This type of construction is popular at home and abroad. It is the first time, and there are no design and construction precedents to learn from

Method used

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  • Construction method for changing monolithic track bed to floating slab track bed in subway operation line tunnel

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Embodiment Construction

[0020] Refer to the attached image for the construction method of changing the integral ballast bed into a floating slab ballast bed in the tunnel of the railway operating line. The construction of key points is blocked in the tunnel of the subway operating line. The construction time of the blockade is 4 hours. The specific construction steps are as follows:

[0021] 1) Concrete demolition in the first stage: Use a high-frequency, low-noise wall saw to cut the concrete of the gutters on both sides longitudinally along the ballast bed on the outside of the sleepers, divide them into small pieces with a hand-held saw, chisel them out with electric picks and hydraulic picks, install The bag is transported outside, and the cutting depth is determined by using a special 4.3m long aluminum alloy ruler. According to the tunnel radius and tunnel convergence value, the vertical distance from the cutting surface to the ruler and the horizontal distance from the tunnel center are collecte...

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Abstract

The invention discloses a construction method for changing a monolithic track bed to a floating slab track bed in a subway operation line tunnel. The construction method comprises the following steps that 1, first-stage concrete breaking and removing is conducted; 2, second-stage concrete breaking and removing is conducted, a temporary steel sleeper transition line is installed, and passage is recovered; 3, third-stage concrete breaking and removing is conducted; 4, foundation concrete construction is conducted; 5, steel bars are tied, and new foundation rapid hardening concrete is poured; 6, floating slabs are laid. A laid track bed is cut through low-noise rope saws and wall saws, cut laid slabs are lifted and conveyed through researched cantilever cranes in a subway tunnel, the new floating slabs are laid, and then the laid monolithic track bed is changed. By the adoption of the construction method, noise is low, the operation line does not stop during construction, safety and reliability are achieved, and the requirements for urban civil construction, operation line transportation, operation line safety and construction efficiency are met.

Description

technical field [0001] The invention relates to the field of construction of a floating slab ballast bed transformed from an integral ballast bed, in particular to a construction method for replacing an integral ballast bed with a floating slab ballast bed in tunnels of subway operating lines. Background technique [0002] In the bustling area of ​​the urban area, close to residential areas and commercial areas, in order to reduce the interference of trains in the process of driving, it is necessary to destroy the overall track bed in the existing tunnel and transform it into a floating slab track bed. This type of construction is popular at home and abroad. It is the first time, and there are no design and construction precedents to learn from. For construction under non-stop conditions, there are targeted selections of equipment and methods in the selection of cutting machinery and equipment, research and development of lifting equipment, and transitional measures for temp...

Claims

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Application Information

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IPC IPC(8): E01B1/00E01B29/00
CPCE01B1/00E01B19/003
Inventor 殷业锁贾炳义周登辉段启楠王薇施海风朱炎新
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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