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High-water-pressure-resistant shield segment bolt hole composite sealing structure

A technology of shield segment and sealing structure, which is applied in the direction of wellbore lining, tunnel lining, underground chamber, etc., and can solve the problem of space limitation for bolt holes

Pending Publication Date: 2021-08-24
CHINA RAILWAY TUNNEL SURVEY & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the above-mentioned waterproof system of shield tunnel joints and bolt holes, the number of waterproofing channels and the size and shape of rubber pads can be considered for segment joints to achieve the purpose of resisting ultra-high water pressure, but the bolt holes are limited by the implementation space , there is currently no solution for high water pressure environments

Method used

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  • High-water-pressure-resistant shield segment bolt hole composite sealing structure
  • High-water-pressure-resistant shield segment bolt hole composite sealing structure
  • High-water-pressure-resistant shield segment bolt hole composite sealing structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: as Figures 1 to 7 As shown, a high water pressure resistant shield segment bolt hole composite sealing structure, including sealing element 4, step anchor bolt 6, bolt anchor end segment structure 1 and bolt non-anchor end segment structure 2; wherein:

[0038] The sealing element 4 includes a cylindrical compacting section 15, and an annular gasket 14 is provided at the bottom of the cylindrical compacting section 15; , large head free section 11 and fasteners; the bolt anchoring end segment structure 1 is provided with an anchoring end groove 7 matching the small head anchoring segment 9; the bolt non-anchor end segment structure 2 is provided with There is a T-shaped groove 3 matching the sealing element 4 and a through groove 8 matching the big head free section 11; the sealing element 4 is set in the T-shaped groove 3, and the stepped anchor bolts 6 are inserted in sequence The segment structure 1 at the bolt anchoring end and the segment structure ...

Embodiment 2

[0041] Embodiment 2: as Figures 1 to 10 As shown, in order to further improve the waterproof and sealing performance of the shield tunnel segment joints, on the basis of the high water pressure resistant shield segment bolt hole composite sealing structure described in Example 1, the following improvements are continued:

[0042] Such as image 3 As shown, since the local corner of the T-shaped groove 3 is usually the weakest point of force, one end of the T-shaped groove 3 is provided with a 45° slope 5 connected to the through groove 8, and the other end is provided with the The tapered groove 21 matched with the ring gasket 14, the slope of the tapered groove 21 is set to 45°; the above settings can effectively increase the bearing capacity of the structure.

[0043] In this embodiment 2, if figure 1 , 2 , 3, 4, and 5, the cylindrical compaction section 15 is glued into the T-shaped groove 3, when the step anchor bolt 6 connects the two shield segment structures, the sm...

Embodiment 3

[0044] Embodiment 3: as Figures 1 to 10 As shown, a high water pressure resistant shield segment bolt hole composite sealing structure differs from Embodiments 1 and 2 in that the fastener consists of a bolt washer 12, a nut 13 and a high resilience rubber ring 20 Composition, the high resilience rubber ring 20 is arranged at the end of the through groove 8 of the segment structure 2 at the non-anchor end of the bolt.

[0045] Such as Figure 8 , 9 , 10, in the present embodiment 3, the outer diameter of the high-resilience rubber ring 20 is 52mm, the inner diameter is 40mm, and the thickness is 6mm, which is in the shape of a truncated cone; The tapered groove matching the elastic rubber ring 20, when the high-resilience rubber ring 20 is fixed with the segment structure 2 at the non-anchor end of the bolt, it plays an active waterproof role through mutual extrusion force. Wherein, the sectional view of the high resilience rubber ring 20 is as Figure 9 As shown, the top...

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PUM

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Abstract

The invention relates to a high-water-pressure-resistant shield segment bolt hole composite sealing structure. The high-water-pressure-resistant shield segment bolt hole composite sealing structure comprises a sealing element, a step anchoring bolt, a bolt anchoring end segment structure and a bolt non-anchoring end segment structure, wherein the sealing element comprises a cylindrical compaction section and an annular gasket; the step anchoring bolt comprises a small-head anchoring section, a small-head free section, a large-head free section and a fastener; and an anchoring end groove which is matched with the small-head anchoring section is formed in the bolt anchoring end segment structure, and a T-shaped groove which is matched with the sealing element and a through groove which is matched with the large-head free section are formed in the bolt non-anchoring end segment structure. The high-water-pressure-resistant shield segment bolt hole composite sealing structure is suitable for the waterproof design of a shield segment bolt hole in the high-water-pressure environment, the active and passive composite waterproof purpose is achieved under the mutual extrusion action of the sealing element and the free section of the step anchoring bolt and under the assistance of a water swelling type material layer, the process is simple, the feasibility is high, and the anti-corrosion capability and durability of a shield tunnel in the high-water-pressure environment can be increased.

Description

technical field [0001] The invention relates to the field of shield tunnel construction, in particular to a high water pressure resistant shield segment bolt hole composite sealing structure with good waterproof effect, simple process and strong implementability. Background technique [0002] With the rapid development of urban infrastructure construction, there are more and more cross-river and sea-crossing tunnel projects in my country, and the design and construction technology of tunnels is gradually exploring in the direction of larger diameter, deeper soil cover, and ultra-high water pressure. Among them, the shield tunnel is usually assembled by several segments, and the segments are connected by bolts. Therefore, there are inevitably many joints between the segments. However, once water leakage occurs at the segment joints, it will pose a great threat to the operational safety of the shield tunnel in the later stage. [0003] The shield tunnel segment joint waterpro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/08E21D11/38
CPCE21D11/083E21D11/386
Inventor 于勇李腾飞刘文骏贺维国邢永辉费曼利宋超业吕洋
Owner CHINA RAILWAY TUNNEL SURVEY & DESIGN INST
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