Tunnel portal sealing device and method for shield launching
A technology of sealing device and tunnel door, which is used in earth-moving drilling, mining equipment, tunnels, etc. to increase pressure, reduce valgus or breakage, and achieve good sealing effect.
Active Publication Date: 2020-11-10
CHINA RAILWAY 11TH BUREAU GRP +1
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Problems solved by technology
[0006] Aiming at the problems existing in the prior art, the present invention provides a portal sealing device and sealing method for shield tunneling in the starting section of the water-rich complex stratum. The sealing device uses magnetic steel plates and improved hinged plates, The combination of curtains and flexible and rigid sealing components are used to seal multiple times to ensure the sealing effect, which can solve the sealing problem of shield tunneling under complex geological conditions with too much water and sand gushing, and improve the safety of shield tunneling
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[0051] The present invention will be further described below in conjunction with drawings and embodiments. attached Figure 1 to Figure 15 The drawings for the embodiments are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the present invention. The following technical solutions shown in the drawings are specific solutions of the embodiments of the present invention, and are not intended to limit the scope of the claimed invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0052] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right" etc. are based on those shown in the accompanying drawings. Orientation...
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The invention provides a tunnel portal sealing device and method for shield launching. The tunnel portal sealing device comprises an embedded tunnel portal ring, an annular rubber cord fabric sealingcomponent and a magnetic sealing component. Each folding pressing plate of the annular rubber cord fabric sealing component comprises an annular fixing plate, a folding plate and a reverse pressing plate, and the magnetic sealing component comprises two annular elastic telescopic plugging steel plates, a tightening device and magnetic steel sheets arranged on inner rings of the elastic telescopicplugging steel plates. In the shield segment assembling process, the two annular elastic telescopic plugging steel plates and a shield tunneling machine shell are attracted to form a rigid sealing structure, the plugging steel plates are made to contract outwards in the annular direction to be separated from the shield tunneling machine shell through the tightening device before shield tunneling,and after shield launching is completed, the plugging steel plates and a launching segment are attracted to form a permanent sealing structure. The device is good in sealing effect, and the problems of water gushing and sand gushing in the shield launching process of a water-rich complex stratum are solved.
Description
technical field [0001] The invention belongs to the field of shield tunneling, and mainly relates to a portal sealing device and a sealing method for shield tunneling, which are designed for the tunneling section of the shield tunneling machine in the water-rich complex stratum. Background technique [0002] With the rapid development of modern urban construction, it will be an inevitable trend to exploit large areas of underground space to relieve urban volume and traffic pressure. The shield tunneling method has the advantages of fast construction and little impact on the ground, and is evaluated by the industry as the most The best underground space construction method. In the shield tunneling method subway construction, since the tunneling of the cutter head of the shield tunneling machine is involved in the shield tunneling, it is one of the more accident-prone procedures, and most of the accidents during the shield tunneling construction process are caused by the soil ...
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IPC IPC(8): E21D9/06
CPCE21D9/0635
Inventor 龙华东张昆峰杜殿逵杨玉刘振东陈焕志练才园
Owner CHINA RAILWAY 11TH BUREAU GRP