A method for testing the force of bolts connecting shield tunnel segments

A technology for shield tunnel segments and connecting bolts, which is applied to the mechanical state test of shield tunnel segment connecting bolts and the field of force testing of shield tunnel segment connecting bolts. Guarantee the survival of the strain gauge and the failure of the sensor element to achieve the effect of ensuring the waterproof effect

Inactive Publication Date: 2011-12-14
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is especially true for the oblique bolts that are widely used at present, because the screw and nut of the oblique bolt are installed as a whole, and when t

Method used

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  • A method for testing the force of bolts connecting shield tunnel segments
  • A method for testing the force of bolts connecting shield tunnel segments
  • A method for testing the force of bolts connecting shield tunnel segments

Examples

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Embodiment

[0035] Embodiment: This embodiment relates to a method for testing the force of bolts connecting a shield tunnel segment, including the following steps:

[0036] 1) Groove 6 in the axial direction on the bolt 3; if it is a single-headed oblique bolt, it is also necessary to open a wire lead-out hole 7 on the position corresponding to the groove 6 on the bolt head cap 8, see image 3 ; If it is a double-ended straight bolt or a double-ended curved bolt, it is necessary to slot 6 along the axial direction on the stud bolt, and the slot 6 is connected to any end of the stud bolt, see Figure 4 .

[0037] 2) Pre-embed the strain sensor element 4 and the wire 5 for connecting the strain sensor element in the groove 6, and encapsulate it with a sealant 10.

[0038] 3) Lead the wire 5 out of the groove of the bolt; if it is a single-headed inclined bolt, the wire 5 needs to be led out from the wire lead-out hole 7 of the bolt head cap 8, see image 3 ;If it is a stud straight bolt ...

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Abstract

The invention relates to a method for testing the force of bolts connecting a shield tunnel segment, comprising the following steps: 1) slotting (6) axially on the bolt (3); 2) pre-embedding a strain sensor in the slot (6) Components (4) and wires (5) connecting the strain sensor elements (4); 3) sealing the strain sensor elements (4) and wires (5) in the groove (6) with a sealant (10), and placing the wires ( 5) lead out from the head of the bolt facing outward; 4) install the bolt (3) between two adjacent segments of the shield tunnel, and fasten the connection, and connect the wire (5) to the testing instrument. This method realizes the stress test of the bolt by drawing grooves on the bolt to encapsulate the wire and the sensor. The components are not affected by the fastening of the bolts, the survival rate of the components is high, and the test effect is good. technical problems.

Description

technical field [0001] The present invention relates to a bolt force test method, in particular to a shield tunnel segment connection bolt force test method, which is suitable for the mechanical state test of the shield tunnel segment connection bolts, Background technique [0002] In recent years, domestic shield tunnels have developed rapidly, including subways, highways, municipalities, railways, water transmission, gas transmission and other industries. The domestic industry has also invested a lot of money in the test and theoretical research of shield tunnels, and carried out a large number of scientific research projects, such as in the mechanical testing and monitoring of shield tunnels, and has also achieved remarkable results. But at present, in terms of state monitoring of shield tunnels, it is only limited to the stress of steel and concrete and the test of tunnel convergence displacement. For the bolts that play a key role in the structural system of shield tunn...

Claims

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Application Information

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IPC IPC(8): E21D11/08G01L1/24
Inventor 肖明清韩向阳石太伟薛光桥刘浩裴利华宁茂权
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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