Test system and test method for water tightness test of tunnel deformation joint waterstop

A test system, deformation joint technology, used in highway and bridge engineering, construction engineering, port engineering, and can solve problems such as damage to waterstops and leakage of bolt holes.

Inactive Publication Date: 2011-09-07
CCCC FOURTH HARBOR ENG INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The early fastening devices consisted of bolts and pressure plates, and the bolts had to penetrate the OMEGA waterstop, which would easily cause the waterstop to be damaged due to stress concentration, and the bolt holes penetrating through the waterstop would easily cause water leakage

Method used

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  • Test system and test method for water tightness test of tunnel deformation joint waterstop
  • Test system and test method for water tightness test of tunnel deformation joint waterstop
  • Test system and test method for water tightness test of tunnel deformation joint waterstop

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The whole system of the present invention mainly includes steel boxes 1 and 2, a steel structure test bench, a pneumatic test bench, a hydraulic test bench, an air compressor, and a set of long-distance automatic observation and reading equipment and a safety protection device. Such as figure 1 , figure 2 As shown, the steel structure test bench is the load-bearing and operating platform of the steel box. The steel boxes 1 and 2 are placed on the base 5 and 6 respectively, and the base 5 is installed on the horizontal guide rail 3, which can be moved along the horizontal guide rail in the X direction. To move, the base 6 is installed on the longitudinal guide rail 4 and can move in the Y direction along the longitudinal guide rail. The jack 7 is used to drive the steel box 1 and its base 5 to move along the X direction, and the jack 8 is used to drive the steel box 2 and its base 6 to move along the Y direction. Positioning pull bar 9,10 is used for demarcating the d...

Embodiment 2

[0048] As in the installation steps of Example 1, the expandable waterstop is fixed between the steel boxes of the test system through the fastening device. Such as Figure 6 As shown, start the test of the expandable waterstop, first install the waterstop to be tested, and then check the test bench; adjust the displacement of the steel box to make the opening amount reach the preset value; pressurize the air compressor; give the expandable waterstop Add air to the hose bladder; inject water into the steel box; check the water pressure equipment; pressurize the air compressor; add the first water pressure; stabilize the pressure, maintain the pressure and read data; add the next level of water pressure; end test, or enter the next water pressure cycle test, and then end the test of the opening amount.

Embodiment 3

[0050] This example is an application example, which is a watertight model test of the deformation joint of the Hong Kong-Zhuhai-Macao Bridge pipe joint.

[0051] This invention has been successfully applied in the "Watertightness Model Test of the Pipe Joint Deformation Joints of the Hong Kong-Zhuhai-Macao Bridge". The maximum working water pressure is 0.48MPa, the safety factor is 2.5, and the maximum water pressure applied during the test is 1.2MPa.

[0052] The test implementation steps are as follows: adjust the steel box model according to the preset deformation combination and fix it, apply the preset water pressure to the steel box-waterstop cavity by using the pressurization equipment, keep the pressure for 2 hours, observe the pressure drop, If the pressure drop is not greater than 5%, the waterstop under the combination of the amount of deformation and the applied water pressure passes the watertightness test.

[0053] The appearance qualification standard of the w...

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PUM

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Abstract

The invention discloses a test system for the water tightness test of a tunnel deformation joint waterstop, which comprises two steel tanks mounted, in a sealed manner, at two sides of a waterstop to be tested, a steel structured test bench, an atmospheric pressure test bench, a hydraulic pressure test bench, an air compressor, a remote-distance full-automatic observing and reading apparatus and a safety protection device. The test device of the invention can be used for the water tightness test of a plurality of waterstops, realize random opening displacement and shear displacement accurately, and simulate the stress condition of deformation joint waterstop structure under different working conditions by applying atmospheric pressure in balloon to a tested object through the atmospheric pressure test bench and applying hydraulic pressure to the steel tanks through the hydraulic pressure test bench to simulate seawater pressure. The system and the method are suitable for the test of OMEGA and GINA waterstops as well as expandable waterstop.

Description

technical field [0001] The invention relates to the fields of construction engineering, port engineering, highway and bridge engineering, etc., and in particular relates to a test device, a test method and a supporting fastening device used in the watertightness test of the deformation joint waterstop of the immersed tube tunnel. Background technique [0002] The immersed tube tunnel is formed by connecting a number of pipe sections, which are divided into flexible pipe sections and rigid pipe sections, and the flexible pipe sections are connected by several pipe sections. In order to ensure the watertightness of the tunnel, a It is connected with adjacent pipe sections by deformation joint waterstops. At present, waterstops commonly used in tunnel construction are GINA waterstops, OMEGA waterstops, groutable steel edge waterstops and expandable waterstops. ; During the operation period of the immersed tube tunnel, due to the influence of uneven settlement of the foundation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/28
Inventor 吕黄苏林王戴宇文康澜张志显陈颂潮
Owner CCCC FOURTH HARBOR ENG INST
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