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Wire sealing device and layout method for concrete shield/TBM segment embedding monitoring instrument

A monitoring instrument and wire sealing technology, which is used in measuring devices, instruments, earth-moving drilling and mining, etc., can solve the problems affecting the force of the segment and the shaking of the wires, and achieves the improvement of the connection rate, the close monitoring results, and the convenience of positioning and searching. Effect

Inactive Publication Date: 2019-11-29
STATE KEY LAB OF SHIELD & TUNNELING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes the monitoring instrument to cause the wires to shake when the segment is poured, causing the segment to form a wire channel, which affects the force of the segment

Method used

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  • Wire sealing device and layout method for concrete shield/TBM segment embedding monitoring instrument
  • Wire sealing device and layout method for concrete shield/TBM segment embedding monitoring instrument
  • Wire sealing device and layout method for concrete shield/TBM segment embedding monitoring instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: A wire sealing device of a concrete shield / TBM segment embedded monitoring instrument, see figure 1 , figure 2 , Including a sealed cavity 5, the sealed cavity 5 is a hollow inside, open at both ends of the cylindrical structure, at one end of the sealed cavity 5 is installed with a screw-tight seal end 4, on the end surface of the sealed end 4 drilled with a wire insert Hole 12.

[0039] A sealing cover 6 is installed at the other end of the sealing cavity 5. The sealing cover 6 includes a cover body, an elastic positioning block 8 arranged at the bottom end of the cover body, and a plug-in connecting with the elastic positioning block 8 arranged inside the cover body. The plug-in type sealing block 9 is inserted and installed at the open end of the sealed cavity 5.

[0040] The wire end of the embedded monitoring instrument passes through the wire socket 12, the free length of the wire is enclosed in the sealed cavity 5, and the wire and the sealed end 4 are re...

Embodiment 2

[0043] Embodiment 2: A wire sealing device of a concrete shield / TBM segment embedded monitoring instrument. The difference from Embodiment 1 is that a positioning magnet block is provided at the end of the elastic positioning block. It is suitable for the use of a magnet block for more accurate positioning when the tube sheet making template is a steel mold.

Embodiment 3

[0044] Example 3: A method for laying out monitoring instruments for embedded concrete shields / TBM segments, see Figure 3-Figure 7 , Including the following steps:

[0045] (1) There are multiple groups of monitoring instruments, which are respectively embedded in the positions to be monitored on the TBM segments. Each group of monitoring instruments includes a steel bar strain gauge 2, a concrete strain gauge 1 and an earth pressure gauge 3; each group of monitoring instruments is equipped with a wire sealing device .

[0046] (2) The steel bar strain gauge 2 is welded in parallel to the area where the stress position of the segment steel bar 15 is the largest; the high-strength steel wire 14 is used for spatial suspension positioning to fix the concrete strain gauge 1 inside the steel frame through wire binding; A steel-reinforced welded skeleton is used to fix the earth pressure gauge 3 on the skeleton of the segment reinforcement 15 and make one side of the earth pressure gau...

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Abstract

The invention discloses a wire sealing device and a layout method for a concrete shield / TBM segment embedding monitoring instrument. The wire sealing device comprises a sealing cavity, wherein a screw-tight sealing end is installed at one end of the sealing cavity, and a wire jack is drilled on the end surface of the sealing end; a sealing cover is installed at the other end of the sealing cavity,and the sealing cover comprises a cover body, an elastic positioning block provided at the bottom end inside the cover body, and a plug-in sealing block provided inside the cover body and connected together with the elastic positioning block; the wire end of the embedded monitoring instrument passes through the wire jack, and the free-length wire is encapsulated in the sealing cavity. The wire sealing device and layout method for the concrete shield / TBM segment embedding monitoring instrument provided by the invention can bring together the wires of the monitoring instruments embedded in theTBM segments to facilitate positioning and searching, and can also ensure that the sensors installed on the segments respond to the stress and strain of the segments to the maximum to improve the connection rate of the monitoring instruments and the accuracy of the monitoring results.

Description

Technical field [0001] The invention relates to the technical field of shield / TBM construction, in particular to a wire sealing device of a concrete shield / TBM segment pre-embedded monitoring instrument and an arrangement method. Background technique [0002] The force of the shield / TBM segment has not been accurately measured. The most important reason is the embedment and sealing of the monitoring equipment. When burying the monitoring instrument, the previous method is to hang the sensor directly on the steel bar. As the concrete is poured and vibrated, the spatial orientation of the sensor changes, and even the sensor monitoring position changes, resulting in the monitoring results of similar segments. There are huge differences. Earth pressure gauges often use embedded monitoring, that is, there is 1~2cm of concrete outside of the earth pressure gauge during monitoring, which causes large errors in the monitoring results. The sealing method of the embedded concrete monitor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/00G01B21/32E21D11/08
CPCG01L1/00G01B21/32E21D11/08
Inventor 陈馈周建军孙振川翟乾智张兵韩伟锋李宏波王利明赵海雷潘东江陈桥王发民杨振兴
Owner STATE KEY LAB OF SHIELD & TUNNELING TECH
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