Tunnel lining device for preventing lining trolley roof crack and construction method
A lining and tunneling technology is applied in the field of devices for preventing tunnel lining trolley roof from cracking and tunnel vaulting, which can solve problems such as worker mistakes, tunnel operation hazards, and inconsistency of front and rear radians.
Pending Publication Date: 2018-03-23
中铁隧道集团一处有限公司
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Problems solved by technology
[0002] When the tunnel lining trolley is positioned in the tunnel, due to the inconsistency of the front and rear radians of the trolley formwork at both ends and the operator's misoperation, the phenomenon of cracking the concrete at the previous set of overlapping joints may occur during the lifting process of the trolley formwork. "Island" cracks are formed at the vault, which poses a great hazard to the operation of the tunnel
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[0014] Below by embodiment and in conjunction with accompanying drawing, the present invention will be further described:
[0015] Such as figure 1 As shown, a device for preventing the roof of the lining trolley from cracking the tunnel lining is composed of a small transformer, three detection and alarm units connected in parallel, a general alarm unit and a control unit for the main oil pump motor of the lining trolley. The output voltage of the small transformer is preferably 24V safe voltage.
[0016] Each detection and alarm unit is composed of a normally closed manual switch, a limit switch and an audible and visual alarm connected in series. Each acousto-optic alarm is connected in parallel with the coil of a relay, the normally open switches of the three relays are connected in parallel and then connected in series with another acousto-optic alarm and the coil of a normally closed relay to form a total alarm unit, and the normally closed contacts of the normally clos...
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The invention relates to a tunnel lining device for preventing lining trolley roof crack. The tunnel lining device for preventing the lining trolley roof crack comprises a miniature transformer, detection alarm units and a main alarm unit. Each detection alarm unit comprises a normal close hand switch, a limiting switch and an audible and visual alarm. Each audible and visual alarm is parallelly connected with a coil of a relay, the normally open contacts of three relays are parallelly connected, and are serially connected with the other audible and visual alarm and the coil of one normal close relay to form the main alarm unit. Three limiting switches are installed at a top model, a left model and a right model of a model board trolley. The distance between the contacts of the limiting switches and an arc line of the model board trolley at the corresponding position is 3-8 mm. The invention further provides a construction method for the tunnel lining device for preventing the lining trolley roof crack. While the trolley model board is jacked to the suitable position, the pre-alarm is sent, and a lining trolley oil pump motor is stopped, the concrete roof crack at the previous group of the overlap position is prevented in the jacking process of the trolley model board, the lining trolley is ensured to be positioned at the optimal location in a tunnel, and a roof crack phenomenon is not produced in the tunnel.
Description
technical field [0001] The invention belongs to the technical field of engineering construction, and in particular relates to a device for preventing the top of a tunnel lining trolley from cracking a tunnel vault and a construction method using the device. Background technique [0002] When the tunnel lining trolley is positioned in the tunnel, due to the inconsistency of the front and rear radians of the trolley formwork at both ends and the operator's misoperation, the phenomenon of cracking the concrete at the previous set of overlapping joints may occur during the lifting process of the trolley formwork. "Island" type cracks are formed at the vault, which poses a great hazard to the operation of the tunnel. Contents of the invention [0003] In order to avoid such quality defects, the present invention intends to provide a device based on a tunnel lining trolley to prevent the trolley from cracking the tunnel vault. [0004] For this reason, the technical solution ad...
Claims
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IPC IPC(8): E21D11/10E21F17/18
CPCE21D11/10E21F17/18
Inventor 刘汉红余备军张万营刘龙卫王卓朱文民曾东李杨孙伟王军庆邹雄飞曾志龙刘旺韩文平王刚白江江吴建忠史秋功耿斌
Owner 中铁隧道集团一处有限公司