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Construction method of tunnel portal water stopping structure for shield excavation and shield arrival

A construction method and receiving hole technology, applied in earthwork drilling, shaft lining, tunnel lining, etc., can solve problems such as poor water-stop effect and single water-stop barrier, achieve enhanced water-stop effect, simple construction, and convenient implementation Effect

Active Publication Date: 2018-12-07
CHINA RAILWAY FIRST GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a single water-stopping barrier, and the rubber cord is easily damaged, resulting in poor water-stopping effect

Method used

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  • Construction method of tunnel portal water stopping structure for shield excavation and shield arrival
  • Construction method of tunnel portal water stopping structure for shield excavation and shield arrival
  • Construction method of tunnel portal water stopping structure for shield excavation and shield arrival

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Embodiment Construction

[0065] Such as figure 1 A construction method for the opening and receiving of the shield tunnel water-stop structure shown includes the following steps:

[0066] Step 1. Installation of water-stop steel brush at the door: before the shield tunneling construction of the shield tunnel 1 under construction, install a ring of water-stop on the inside of the starting portal 2 and the receiving portal of the shield tunnel 1 under construction. Steel brush 11, see figure 2 with image 3 ;

[0067] Both the originating portal 2 and the receiving portal are provided with a portal steel ring 10, and each circle of the water-stop steel brush 11 includes a plurality of water-stop steel brushes arranged on the inner wall of the portal steel ring 10 along the circumferential direction. Brush 11, a plurality of said water-stop steel brushes 11 are arranged on the same cross-section of the door steel ring 1 with the same structure and size, and each circle of said water-stop steel brushe...

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Abstract

The invention discloses a construction method of a tunnel portal water stopping structure for shield excavation and shield arrival. The construction method includes the steps that firstly, water stopping steel brushes are installed, specifically, before shield tunneling construction, two circles of water stopping steel brushes are installed in the excavation tunnel portal and arrival tunnel portalcorrespondingly, each circle of water stopping steel brushes includes a plurality of water stopping steel brushes arranged on the inner walls of portal steel rings in the circumferential direction and forms inner side water stopping rings; secondly, tunnel portal outer side water stopping structures are installed, specifically, the portal outer side water stopping structures are installed on theouter sides of the tunnel portal steel rings, and each tunnel portal outer side water stopping structure comprises a rubber curtain cloth and a folding pressing plate; thirdly, sealing grease is filled, specifically, each water stopping steel brush is filled with the sealing grease; and fourthly, shield excavation is carried out. According to the construction method of the tunnel portal water stopping structure for the shield excavation and the shield arrival, the design is reasonable, and the use effect is good, inner side water stopping rings on the portal steel rings are combined with the tunnel portal outer side water stopping structures to stop water, the construction is simple, damage is avoided, the problem of water stopping of the excavation tunnel portal and the arrival tunnel portal in the construction of shield tunneling method can be effectively solved, and the effect of the portal water stopping is good.

Description

technical field [0001] The invention belongs to the technical field of tunnel shield construction, and in particular relates to a construction method for a portal water-stop structure used for shield tunnel initiation and reception. Background technique [0002] With the rapid growth of my country's economy and the rapid expansion of urban population, the number of motor vehicles has increased exponentially. The original municipal roads are difficult to meet the needs of traffic. In order to alleviate the pressure of urban traffic and create a good living and investment environment, domestic All major cities choose to build subway tunnels to enhance their city image and investment environment. Due to the advantages of wide ground adaptability and high construction safety factor, the shield tunneling method has become the main construction method for urban subway tunnel construction. [0003] The process of the shield machine entering and exiting the construction stratum thro...

Claims

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Application Information

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IPC IPC(8): E21D11/38E21D9/06
CPCE21D9/06E21D11/38
Inventor 严淦季明杨永强黄磊倪贺侯双辉郝洪波
Owner CHINA RAILWAY FIRST GRP CO LTD
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