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A new method for sealing the gap between subway shield excavation portals

A technology for shield tunnels and portals, which is applied in earthwork drilling, underground chambers, shaft equipment, etc. It can solve problems such as blockage and damage of synchronous grouting system, inability to fill grout, and occupy a certain amount of time, so as to achieve low environmental pollution on site , Occupying less manpower and less material waste

Active Publication Date: 2022-04-19
CHINA RAILWAY NO 3 GRP CO LTD +1
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Problems solved by technology

However, this method also has certain defects: because the double-fluid slurry coagulates too fast, it is easy to cause blockage and damage to the synchronous grouting system, and the shield-tail synchronous grouting system cannot be used to fill the segment wall with grout. Grouting equipment for grouting, equipment access and debugging, connection of water and electricity lines, and on-site mixing of materials all take a certain amount of time, the process is complicated, time-consuming and laborious; the double slurry will seep out of the door seal, resulting in increased waste of grouting materials cost; at the same time, the short coagulation time of the double liquid slurry will cause unnecessary damage to the shield machine due to improper operation

Method used

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  • A new method for sealing the gap between subway shield excavation portals
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  • A new method for sealing the gap between subway shield excavation portals

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than All the embodiments; based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the protection scope of the present invention.

[0026] A new type of gap sealing method for the shield tunnel door. The concrete of the shield tunnel tunnel door is provided with a cord rubber plate 2, and the outer side of the cord rubber plate 2 is provided with a fan-shaped pressure plate 5 to be pressed against the shield body. Remove 2-3 pieces of the fan-shaped pressure plate 5 in the direction of 12 o’clock directly above the door, open the corres...

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Abstract

The invention belongs to the technical field of shield tunneling, and in particular relates to a novel method for sealing a gap between a tunnel door of a shield tunnel. The present invention provides a new method for blocking the tunnel door of shield tunneling, comprising the following steps: S100~installation of the tunnel door sealing device; S200~destruction of the tunnel door; S300~calculation of concrete volume for the tunnel sealing tunnel; S400~installation Pour the pump pipe; S500~concrete pouring; S600~After the concrete has finally set, remove the door seal. The invention has the advantages of simple operation procedure and high plugging efficiency. Less labor, less consumption, significant economic benefits, and better sealing compactness.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling, and in particular relates to a novel method for sealing the gap between tunnels of shield tunnels when tunnels pass through intervals. Background technique [0002] During the construction of the shield section of the subway, when the shield machine enters and exits the tunnel, the door blocking is often the key part of quality control. After the shield machine starts or receives, a large number of building gaps are caused when the tunnel door is broken, and it needs to be repaired in a short time. Fill the gap between the segment and the door to avoid water gushing, mud gushing and landslides. In order to reduce the risk of shield tunneling, the grouting method is usually used to seal the gap in time after the shield tunnel is drilled and several ring segments are assembled. The sealing material of conventional shield tunnel door is 1:1 cement and water glass double liquid slurry. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/14E21D11/10
CPCE21D9/14E21D11/105
Inventor 李学飞刘贤良刘振亚宁轲康见星张泽锋谭旭冷建朋李学龙韩淼张文胜高伍
Owner CHINA RAILWAY NO 3 GRP CO LTD
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