Waterproof method for entrance of shield tunnel

A technology for shield tunneling and tunnel entry, which is applied to tunnels, tunnel linings, and earth-moving drilling and mining, etc., can solve the problems of limited sampling points, difficult homogeneity, and large soil reinforcement range, and achieve good water tightness and improve safety. coefficient, the effect of avoiding mud and water leakage

Inactive Publication Date: 2009-10-21
SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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AI Technical Summary

Problems solved by technology

The disadvantage is that the soil reinforcement range is large, and it is difficult to ensure the homogeneity of reinforcement. Although samples can be sampled and tested on site, the sampling points are limited, and it is impossible to ensure that the entire soil meets the design requirements.

Method used

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  • Waterproof method for entrance of shield tunnel
  • Waterproof method for entrance of shield tunnel

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Embodiment Construction

[0015] The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:

[0016] like Figure 1-2 As shown, the labels 1-21 respectively represent: cap nut 1, tee joint 2, well ring 3, washer 4, bolt 5, pressure block 6, air bag 7, cord rubber plate 8, spring steel plate 9, arc-shaped spring steel plate 10 , the outer wall of the lining segment 11, the air-filled pipe 12, the well ring steel plate 13, the cap nut 14, the arc-shaped end 15 of the arc-shaped spring steel plate 10, the shield driving direction 16, the reinforced soil 17, and the enclosure structure 18. Lining 19, embedded steel ring 20, annular reinforced concrete protection ring 21.

[0017] The tunnel entry waterproofing method of the shield tunnel involved in this embodiment includes the well ring 3, the outer wall of the lining segment...

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Abstract

The present invention relates to waterproofing methods, in particular to a hole-entry waterproofing method for shield tunnels in underground structures. The waterproofing method is characterized in that: before pouring concrete in the well circle of the tunnel, an inflatable pipe is pre-buried, and the mouth of the pipe is connected to an air bag. and the external air source; before the shield enters the hole, install the cord rubber plate, spring steel plate and air bag; when the shield enters the hole, the air bag is inflated to push the spring steel plate to compress the rubber plate. When the machine enters the hole, the air bag is inflated, and the rubber sheet is tightly wrapped on the outer surface of the shield or the lining, so that the gap between the shield and the well circle has good water tightness, avoiding possible muddy water leakage, and changing the In the past, shield tunneling only relied on a single measure of soil reinforcement, which improved the safety factor of shield tunneling.

Description

technical field [0001] The invention relates to waterproof methods, in particular to a hole-entry waterproof method for shield tunnels with underground structures. Background technique [0002] The entrance waterproofing of existing shield tunnels is carried out through soil reinforcement. Generally, mixing piles, rotary jetting piles or freezing methods are used in the surrounding area of ​​the entrance to construct the soil. The main construction principle of the pile is to form a continuous water-stop curtain in the soil within a certain range of the entrance of the tunnel, combined with the method of combined precipitation to ensure the safety of the excavation surface of the shield tunnel; the main construction principle of the freezing method is to use freezing equipment at the entrance of the tunnel , so that the soil within a certain range is frozen and hardened, ensuring the safety of the excavation surface of the shield tunnel. The disadvantage is that the soil re...

Claims

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Application Information

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IPC IPC(8): E21D11/38
Inventor 陆明朱祖熹邵臻乔宗昭
Owner SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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