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Shield launching construction tunnel portal sealing device and method

A technology of sealing device and construction hole, which is applied to shaft equipment, earthwork drilling, wellbore lining, etc., can solve problems such as difficulty in initial construction pressure, soil loss at the end, leakage of the hole door, etc., so as to avoid hidden dangers of soil safety. , High connection strength, good compressive performance

Pending Publication Date: 2022-04-22
CHINA RAILWAY TUNNEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention relates to a sealing device and method for a portal of a shield tunnel starting construction. Based on the conventional sealing method, a sealing device and a method for a portal of a shield tunnel tunnel starting construction are designed, which can effectively solve the problem of unsealed curved plate ends in the background technology. The shield body often squeezes and seals through the shield body, resulting in seal damage. Under high water pressure, the door is prone to leakage, which makes it difficult to build pressure at the beginning. Long-term leakage may also lead to water and soil loss at the end, and even damage to the pipeline. , terminal collapse and other serious consequences

Method used

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  • Shield launching construction tunnel portal sealing device and method
  • Shield launching construction tunnel portal sealing device and method
  • Shield launching construction tunnel portal sealing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] refer to Figure 1 to Figure 6 , the sealing device for the opening door of the shield machine, including the embedded steel ring 1 of the opening door, the extended steel ring 2, and the arc-shaped sealing steel plate 4, the embedded steel ring 1 of the opening door is connected with the ground connection wall 300, and the embedded steel ring The ring 1 is fixed in the structural side wall 200, the extended steel ring is connected with the pre-embedded steel ring 1 of the door, the peripheral side of the arc-shaped sealing steel plate 4 is sealed and connected with the extended steel ring 2, and the inner peripheral side of the arc-shaped sealing steel plate 4 Sealed connection with negative ring segment 3, grouting hole 41 reserved on arc-shaped sealing steel plate 4, ground connection wall 300, pre-embedded steel ring 1 for the hole door, extension steel ring, arc-shaped sealing steel plate 4, and negative ring pipe A sealed cavity is enclosed between the sheets 3 . ...

Embodiment 2

[0084] The difference between this embodiment and embodiment 1 is:

[0085] The opening door sealing device for shield tunneling, including the door embedded steel ring 1, the extended steel ring 2, and the arc-shaped sealing steel plate 4, the door embedded steel ring 1 is connected to the ground connection wall 300, and the door embedded steel ring 1 is fixed in the structural side wall 200, the extended steel ring is connected with the pre-embedded steel ring 1 of the door, the peripheral side of the arc-shaped sealing steel plate 4 is indirectly connected with the extended steel ring 2, and the inner circumference of the arc-shaped sealing steel plate 4 is The side is sealed and connected with the negative ring segment 3, the arc-shaped sealing steel plate 4 is provided with a reserved grouting hole 41, the ground connection wall 300, the pre-embedded steel ring 1 of the hole, the extension steel ring, the arc-shaped sealing steel plate 4, and the negative ring A sealed ca...

Embodiment 3

[0093] The difference between this embodiment and embodiment 1 is:

[0094] The sealing bodies 7 are in one group, and the first group is arranged between the first extended steel ring 21 and the second extended steel ring 22 . Sealing body 7 is stage clip sealing rod, and stage clip sealing rod comprises depression bar, and the head of stage clip sealing bar is provided with rubber sealing ring, and stage clip stage stage is set between depression bar and rubber sealing ring.

[0095] The peripheral side of the arc-shaped sealing steel plate 4 is sealed and connected with the extension steel ring 2 through the sealing body 7,

[0096] A group of door seal brushes are arranged in the sealed chamber, the upper end of the door seal brushes is fixed on the inner wall of the extension steel ring 2, and the lower end of the door seal brushes is in contact with the negative ring segment 3. The extended steel ring 2 includes a first extended steel ring 21 , and the door seal brush i...

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Abstract

The invention discloses a shield launching construction tunnel portal sealing device and method.The shield launching construction tunnel portal sealing device comprises a tunnel portal pre-buried steel ring (1), an extending steel ring (2) and an arc-shaped sealing steel plate (4), the tunnel portal pre-buried steel ring (1) is connected with an underground diaphragm wall (300) and fixed in a structural side wall (200), the extending steel ring is connected with the tunnel portal pre-buried steel ring (1), and the arc-shaped sealing steel plate (4) is fixed in the tunnel portal pre-buried steel ring (1). One side of the periphery of the arc-shaped sealing steel plate (4) is directly or indirectly connected with the extending steel ring in a sealed mode, one side of the inner periphery of the arc-shaped sealing steel plate (4) is connected with the negative ring duct piece (3) in a sealed mode, and a reserved grouting hole (41) is formed in the arc-shaped sealing steel plate (4). The tunnel portal sealing device for shield launching construction is simple and ingenious in structure, good in sealing performance, high in reliability and capable of rapidly building pressure and guaranteeing shield launching safety.

Description

technical field [0001] The invention belongs to the technical field of tunnel door sealing construction, and in particular relates to a tunnel door sealing device and method for shield tunneling initiation construction. Background technique [0002] During the initial construction of the shield, in order to ensure the safety of the end, it is necessary to prevent water and soil loss at the end and establish the position pressure of the cutterhead as soon as possible to stabilize the stratum at the end. The arc-shaped plate end is not sealed. There are gaps between the segments. Generally, the method of installing curtain rubber plates and folding pressing plates on the embedded steel ring of the tunnel door is used. When the shield machine is moving forward, the curtain wraps the water and soil against the shield body and segments to achieve The purpose of sealing the door; however, the shield body often squeezes and seals through the shield body, resulting in damage to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21D9/087E21D11/00E21D11/08E21D11/10
CPCE21D9/14E21D9/087E21D11/003E21D11/08E21D11/10
Inventor 李亚超刘江袁逢逢李东泰唐均利夏站辉张赛赵康汪跃辉
Owner CHINA RAILWAY TUNNEL