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Detection system for grouting depth of tunnel

A detection system and depth technology, applied in the field of tunnel grouting depth detection system, can solve the problems of small difference in dielectric constant, inability to apply grouting depth detection, and inability to accurately judge the grouting depth, etc., to achieve fast detection speed and low work intensity , the effect of high detection accuracy

Pending Publication Date: 2019-12-24
CHINA MCC5 GROUP CORP
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Geological radar identifies the formation through the difference in the dielectric constant of the medium interface. However, due to the small difference in the dielectric constant between the grouted rock mass and the ungrouted rock mass, the grouting depth cannot be accurately judged, so it cannot be applied to the detection of the grouting depth. Improved Design

Method used

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  • Detection system for grouting depth of tunnel
  • Detection system for grouting depth of tunnel

Examples

Experimental program
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Effect test

Embodiment 1

[0016] like figure 1 As shown, in this embodiment, a detection system for the grouting depth of a tunnel includes several grouting holes arranged in the tunnel, a computer 6, a radar host 5 electrically connected to the computer 6, and a transceiver antenna 4 electrically connected to the radar host , the bottom of the grouting hole is provided with a signal reflection device 7 .

[0017] When constructing the tunnel, after the construction of the primary lining 1 and the secondary lining 2 is completed, grout is injected into the surrounding rock 3 outside the primary lining 1 through the grouting hole to fill the gaps in the surrounding rock 3 to avoid water leakage and increase the surrounding rock 3 strength and carrying capacity. The grouting range needs to meet a certain depth requirement, and the signal reflection device is set at the bottom of the grouting hole. The transmitting and receiving antenna 4 emits electromagnetic waves in the range of the surrounding rock ...

Embodiment 2

[0020] like figure 2 As shown, on the basis of the above-mentioned embodiments, in this embodiment, the signal reflection device 7 adopts metal pillars.

[0021] The use of a metal post with a certain length facilitates nailing the signal reflector 7 into the surrounding rock 3, and helps to keep it fixed, preventing the signal reflector 7 from loosening or falling off and affecting the position accuracy, thereby avoiding the signal reception being affected.

[0022] In this embodiment, the nailed end of the metal post is conical or wedge-shaped. In this way, the signal reflection device 7 can be easily nailed into the surrounding rock 3, and the conical or wedge-shaped end structure can make the signal reflection device 7 and the surrounding rock 3 squeeze each other, thereby increasing the number of signal reflection devices. 7 and the connection strength between the surrounding rock 3, so as to prevent the signal reflection device 7 from loosening or falling off.

[0023...

Embodiment 3

[0025] On the basis of the above embodiments, in this embodiment, the grouting holes are arranged along the same straight line, which facilitates the uniform distribution of the grout during grouting and the formation of a grouting area with uniform thickness. During detection, the monitoring system detects along the connection line of adjacent grouting holes, and arranging the grouting holes along the same straight line is also convenient for later detection of the grouting area. The grouting holes are generally arranged in a ring of two meters along the length of the tunnel, and each ring is provided with eight holes, so that the grouting holes in each ring are distributed in the same position. Along the length of the tunnel, the grouting holes at the same height can aligned along the same straight line.

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Abstract

The invention discloses a detection system for grouting depth of a tunnel, and the detection system comprises a plurality of grouting holes formed in the tunnel, a computer, a radar host electricallyconnected with the computer and a transmitting and receiving antenna electrically connected with the radar host, wherein signal reflection devices are arranged at the bottoms of the grouting holes. According to the invention, the detection system has the following beneficial effect: the scheme is convenient for detecting the grouting depth by using the detection principle of the radar through thecooperative use of the signal reflection devices and the radar host, the detection of a whole tunnel line can be realized through moving the radar host, the detection system has the advantages of fastdetection speed, high detection accuracy and low working intensity with destroying the structure that has been poured and the original grouting holes. If the test fails, the grouting can be continuously performed on the original basis to meet the construction requirements.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a detection system for tunnel grouting depth. Background technique [0002] The detection of tunnel grouting depth is carried out for the grouting surrounding rock behind the tunnel lining. The traditional method is to judge whether the grouting depth meets the design standard by checking the depth of the grouting hole. The inspection of the grouting holes is simple and intuitive, but due to the large number of grouting holes, if there are fewer inspection holes, it cannot reflect whether the overall grouting depth reaches the design standard depth, but if all the holes are inspected, the workload will be too large It is difficult to complete, and the traditional hole inspection method has the problems of low measurement accuracy and the inability to use calculations for digital recording. With the development of science and technology, geological radar technology ha...

Claims

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Application Information

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IPC IPC(8): E21F17/18G01S13/88
CPCE21F17/18G01S13/88
Inventor 李岩松罗利罗建勋
Owner CHINA MCC5 GROUP CORP
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