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Shield-tunnel lining segment T-shaped seam two-sealing-pad waterproof test device and method

A technology for gasket waterproofing and lining segments, which is applied in fluid tightness testing, measuring devices, and testing of machine/structural components, etc. It can solve problems such as the inability to scientifically simulate the waterproof effect of waterproof gaskets, and achieve high model accuracy Effect

Inactive Publication Date: 2017-08-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This device mainly has the following defects: under actual working conditions, the expansion and compression of the two elastic gaskets at the joint of the shield tunnel are determined by the stress state of the joint, regardless of whether the joint bears positive or negative bending moment, The waterproof gasket on the pressure side must be tightly fitted, and the waterproof gasket on the tension side must have a certain amount of opening. In the existing two-layer waterproof gasket test device, the two gaskets maintain simultaneous compression. Quantity changes, its stress state is essentially the same
Therefore, it is impossible to scientifically simulate the waterproof effect of the two waterproof gaskets under the stress state of the actual segment joint

Method used

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  • Shield-tunnel lining segment T-shaped seam two-sealing-pad waterproof test device and method
  • Shield-tunnel lining segment T-shaped seam two-sealing-pad waterproof test device and method
  • Shield-tunnel lining segment T-shaped seam two-sealing-pad waterproof test device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In this embodiment, a shield tunnel lining segment T-shaped seam waterproof test device with two gaskets, such as figure 1 As shown, by setting the inner and outer grooves of the lower trial mold and the upper right trial mold to different height differences, after installing two elastic gaskets, pressing the three trial molds tightly, the lower part of the T-shaped seam can be created The two waterproof sealing strips of the "一" seam and the upper "∣" seam respectively have a working condition where one opening is 0 and the other side has a certain opening, and then the water is injected and drained through two sets of water injection and drainage channels. 1. The air in the second sealing chamber is discharged, and finally passes through the water injection channel of the first sealing chamber, injecting water from the center, simulating the situation where high-pressure water breaks through two T-shaped elastic gaskets in turn, so as to achieve accurate measurement of...

Embodiment 2

[0073] In the shield tunnel lining segment T-joint waterproof test device for two seals in this embodiment, the inner ring of the upper left outer groove and the inner ring of the upper right outer groove on the T-shaped horizontal side are provided with rectangular grooves. , the inner ring of the lower outer groove is a plane; the inner ring of the upper left outer groove located on the vertical side of the T shape is provided with a rectangular groove, and the inner ring of the upper right outer groove located on the vertical side of the T shape is a plane. Other parts of the device are the same as in Example 1.

[0074]Using the test method of the shield tunnel lining segment T-shaped seam waterproof test device with two sealing pads in this embodiment, the method step 1) is:

[0075] Firstly, determine the opening value of the tension side of the two sealing pads in the lower "one" seam and the upper "∣" seam that need to be measured in the test, preferably, the lower "on...

Embodiment 3

[0078] In the shield tunnel lining segment T-joint waterproof test device for two seals in this embodiment, the inner ring of the upper left outer groove and the inner ring of the upper right outer groove on the T-shaped horizontal side are provided with rectangular grooves. , the inner ring of the lower outer groove is provided with a groove; the inner ring of the upper left outer groove located on the T-shaped vertical side is provided with a rectangular groove, and the inner ring of the upper right outer groove located on the T-shaped vertical side is provided with a groove. Has a rectangular groove. Other parts of the device are the same as in Example 1.

[0079] Using the test method of the shield tunnel lining segment T-shaped seam waterproof test device for two seals in this embodiment, the method step 1) is

[0080] Firstly, determine the opening value of the tension side of the two sealing pads in the lower "one" seam and the upper "∣" seam that need to be measured i...

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Abstract

The invention relates to a shield-tunnel lining segment T-shaped seam two-sealing-pad waterproof test device and method, and the device is wholly shaped like T, and comprises a lower test die, an upper left test die, and an upper right test die. The lower test die, the upper left test die and the upper right test die are respectively sequentially provided with an internal trench and an external trench from the inside to the outside on the corresponding contact surface. The interior of each internal trench and the interior of each external trench are respectively provided with an elastic sealing pad. The inner ring of the upper left external trench is a plane, or is provided with a rectangular groove or a rectangular boss. The inner ring of the upper right external trench is a plane or is provided with a rectangular groove or a rectangular boss. The lower external trench is a plane or is provided with a rectangular groove or a rectangular boss. Compared with the prior art, the device is advantageous in that the device can truly simulate the waterproof test of two sealing pads of a T-shaped seam under different stress conditions, is high in model precision, and truly simulates the waterproof capability test under different misplaced conditions.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a waterproof test device and method for two sealing pads in a T-shaped seam of a shield tunnel lining segment. Background technique [0002] As an important part of shield tunneling construction technology, the staggered joint assembly technology of lining segments has always been the focus of engineering circles. The superiority of the staggered joint segment tunnel in terms of deformation and waterproof control, as well as the broad prospects for the development of shield automatic construction technology. [0003] Under the staggered seam assembly method, only three seams meet at the intersection of the longitudinal and circular seams, forming a T-shaped seam. Compared with the cross seam under the through-seam assembly, the waterproof condition of the seam is easier to handle; and the T-shaped seam under the staggered seam assembly The seam deformation is small, whi...

Claims

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Application Information

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IPC IPC(8): G01M3/28
CPCG01M3/2807
Inventor 张子新孙杰黄昕刘威朱叶艇王帅峰
Owner TONGJI UNIV
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