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A coaxial cable composite grouting body suitable for tdr signal slope monitoring

A technology of coaxial cable and composite grouting, which is applied in the field of geotechnical engineering and geotechnical engineering slope monitoring, can solve problems that need to be further studied, achieve high reflection coefficient amplitude changes, large shear displacement, and improve sensitivity sexual effect

Active Publication Date: 2016-03-09
福建省交通规划设计院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the key technical issues of TDR technology in slope monitoring, such as the selection of the coaxial cable and the determination of the strength of the grouting body, etc., still need to be further studied

Method used

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  • A coaxial cable composite grouting body suitable for tdr signal slope monitoring
  • A coaxial cable composite grouting body suitable for tdr signal slope monitoring
  • A coaxial cable composite grouting body suitable for tdr signal slope monitoring

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Embodiment Construction

[0015] The technical solutions in the present invention will be clearly and completely described below in conjunction with specific experimental data. Apparently, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] First select the appropriate coaxial cable by experimenting: In order to cooperate with the test, a shearing device is specially designed to simulate and analyze the influence of local shear deformation of different types of coaxial cables on the TDR waveform. The test steps are as follows:

[0017] Design and make cutout modules

[0018] Prepare cables: choose different types of cables, and connect the ends with BNC adapters that can be connected with the TDR100 tester.

[0019] Connecting equipme...

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Abstract

The invention discloses a coaxial cable composite grouting body suitable for TDR signal slope monitoring. The outer diameter of the sheath is 10.80mm, the outer diameter of the sheath is 12.50mm, and the characteristic impedance is 75Ω. It adopts a 4-layer shielding structure, and the shielding material is braided with aluminum foil and tinned copper wire; the attenuation constant is less than or equal to 1.0dB / 100m at 5MHz; the return loss is less than When it is equal to 300MHz, it is greater than or equal to 22dB, and the shielding attenuation is greater than or equal to 85dB at 5MHz; the protective leather sheath of the coaxial cable is stripped off before the on-site drilling and buried, and the coaxial cable stripped of the protective leather sheath is fixed in the center of the drilling hole; the drilling hole is filled with water Mud mortar, the mix ratio of cement:sand in cement mortar is 1:1~2; the strength of cement mortar is 1 to 3 times of the strength of slope soil.

Description

technical field [0001] The invention relates to the field of geotechnical engineering side slope monitoring, in particular to the field of geotechnical engineering suitable for TDR signal side slope monitoring. Background technique [0002] The most effective way to prevent and control slope disasters is to effectively monitor the health of the slope, and to provide early warning signals in time according to the monitoring results to ensure the safety of the slope. The commonly used inclinometer method requires manual observation, and it cannot be monitored in real time during the dangerous time of the slope during the typhoon storm season. TDR (TimeDomain Reflectometry) is a remote testing technology consisting of TDR coaxial cable, cable tester, data recorder, remote communication equipment and data analysis software. The complete TDR system can automatically stabilize slopes. Continuous and real-time monitoring of the status is a safer and more economical monitoring meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/32
CPCG01B21/32G01B2210/66
Inventor 郑也平曾庆有刘毓氚卢才金左广洲
Owner 福建省交通规划设计院有限公司
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