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Large-included-angle oblique starting sealing device and method for shield tunneling machine

A technology of sealing device and shield machine, which is applied in earth drilling, hydroelectric power generation, mining equipment, etc. It can solve the problems of poor sealing effect and unable to start sealing at a large included angle of shield machine, so as to shorten the construction period, Effects of reduced impact and easy operation

Pending Publication Date: 2022-05-31
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a shield machine with a large included angle oblique starting sealing device and method to solve the technical problem that the existing sealing device has poor sealing effect and cannot carry out the shield machine's large included angle oblique starting sealing

Method used

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  • Large-included-angle oblique starting sealing device and method for shield tunneling machine
  • Large-included-angle oblique starting sealing device and method for shield tunneling machine
  • Large-included-angle oblique starting sealing device and method for shield tunneling machine

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: A shield machine with a large included angle oblique starting sealing device, see Figure 1 to Figure 3 , including the concrete main structure of the foundation pit, a steel ring matrix is ​​arranged inside the main concrete structure of the foundation pit, the steel ring matrix is ​​connected to the front end of the extended steel ring, the extended steel ring is arranged in an inclined shape, and is connected with the shield machine The axis is parallel to the posture of the shield machine, so as to play a sealing role; and the rear end of the extended steel ring is fixedly connected with a sealing rubber plate through high-strength bolts, and the sealing rubber plate wraps the shield The casing of the TBM is used to prevent the influx of groundwater. The sealing rubber plate is connected with an anti-turnover pressure plate through a circular connecting plate. During the starting process of the shield machine, since the sealing rubber The shield machin...

Embodiment 2

[0029] Embodiment 2: A method of sealing the shield machine with a large angle obliquely starting, using the method of sealing the shield machine with a large angle obliquely starting in the above embodiment 1, taking the Pearl River Delta intercity Pazhou branch line project as an example For example, due to the limitation of the structural form, the axis of the shield machine’s starting working shaft is not parallel to the axis of the shield tunnel, and there is an included angle of 6°; the starting of the shield machine must be constructed according to the tunnel axis, resulting in The wall also forms an included angle of 6°. If the conventional "bucket type" portal sealing device is used, the advancement of the shield machine will cause damage to the portal sealing device, and the safety of the shield tunneling cannot be guaranteed.

[0030] It mainly includes the following steps:

[0031] (1) According to the fact that the shield machine and the wall of the working well ...

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Abstract

The invention discloses a large-included-angle oblique starting sealing device and method for a shield tunneling machine. The technical problems that an existing sealing device is poor in sealing effect and cannot conduct large-included-angle oblique starting sealing on the shield tunneling machine are solved. The sealing device mainly comprises a foundation pit concrete main body structure, a steel ring base body is arranged in the foundation pit concrete main body structure, the steel ring base body is connected with the front end of an extension steel ring, and the extension steel ring is in an inclined shape and is parallel to the axis of the shield tunneling machine. And a sealing structure is arranged at the rear end part of the extension steel ring. The inclined extension steel ring is arranged and is parallel to the axis of the shield tunneling machine, so that the posture of the extension steel ring is kept consistent with that of the shield tunneling machine, the inclined launching condition of the shield tunneling machine is met, structural concrete of the included angle part does not need to be chiseled away, and the construction cost is reduced. The construction method has the advantages that the risk on the structural stability after the structural concrete is chiseled away is eliminated, the construction cost is reduced, the construction period is shortened, and the influence caused by intersection of construction organizations is reduced.

Description

technical field [0001] The invention relates to the technical field of starting sealing of a shield machine, in particular to a large-angle oblique starting sealing device and method of a shield machine. Background technique [0002] With the increase of China's population, ground transportation cannot fully meet people's daily travel needs, and the process of subway construction is accelerating. In the process of urban subway construction, shield machines are generally used for excavation. During the initial construction of shield tunnels, in order to ensure For the safety of the end, it is necessary to seal the starting portal, especially in the shield excavation section with high groundwater level and abundant groundwater resources, which requires extremely high sealing performance of the portal. [0003] In the construction of mud-water shield, the starting hole of shield tunneling is one of the major risk sources of shield tunneling method construction, especially in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/06
CPCE21D9/06E21D9/0635Y02E10/20
Inventor 李彦青张卫卫李吉昌屈海彭跃松沈世洲党彪兰俊涛
Owner CHINA RAILWAY TUNNEL GROUP CO LTD