Rock-soil body deformation distribution type sensing measuring cable of parallel spiral transmission line structure
A transmission line structure, parallel helix technology, applied in electric/magnetic solid deformation measurement, extensible conductor cable, tension measurement, etc. measurement, etc.
Active Publication Date: 2012-06-27
CHINA JILIANG UNIV
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Problems solved by technology
Since coaxial cables and parallel straight lines have limited elongation and are easy to break, they are not suitable for distributed measurement of large deformation of rock and soil. Therefore, it is necessary to invent a rock and soil deformation sensing measurement cable with relatively large elongation.
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[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0017] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, in the present invention, a layer of two mutually insulated cables 2 is tightly wound around a round-section silicone rubber strip 1, and the two cables form a helix, and the two cables form a helix and are wrapped with a silicone rubber sheath. The tube 3, constituting the sensor measuring cable 7. One end of the two cables is connected with matching impedance Z L , the other ends of the two cables are connected to the time domain reflectometry instrument 4 .
[0018] The insulation sheaths of the parallel straight wires are joined together so that the distance between the wires remains constant. Initially, the wire is tightly wound on the surface of the round-section silicone strip. The construction described above is characterized by a comparatively large elongation of the me...
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The invention discloses a rock-soil body deformation distribution type sensing measuring cable of a parallel spiral transmission line structure. Two mutually insulated cable wires in a layer are tightly wound outside a silicon rubber strip with a circular section; the two cable wires form a spiral line; a silicon rubber pipe is wrapped outside the spiral line formed by two cable wires; one end of each of two cable wires is connected with a matched impedance ZL; and the other end of each of two cable wires is connected with a time domain reflection measuring instrument. According to the rock-soil body deformation distribution type sensing measuring cable of the parallel spiral transmission line structure, disclosed by the invention, the distribution measurement of rock-soil body deformation and the location of a deformation position are realized, the troubles of unchanged measurement position and unmeasured deformation position in a process of measuring the rock-soil body deformation in precursor of geological disasters such as current landslip, ground depression and the like are solved, and a non-missing measurement tool and means are provided for greatly reducing injury of the geological disasters on human beings.
Description
technical field [0001] The invention relates to a distributed sensing and measuring cable for rock and soil deformation, in particular to a distributed sensing and measuring cable for rock and soil deformation with a parallel spiral transmission line structure. Background technique [0002] my country is a country with frequent geological disasters, and frequent geological disasters have brought huge losses and threats to people's lives and property. In order to reduce the losses caused by geological disasters, various disaster prevention and monitoring methods and technologies are widely used in various fields and have achieved remarkable disaster avoidance and prevention effects. Local rock and soil deformation caused by geological movements such as landslides and land subsidence is an important precursory phenomenon that needs to be monitored. If the location and magnitude of deformation of rock and soil mass can be accurately located in the early stage of disaster, the ...
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IPC IPC(8): H01B7/06G01B7/16
CPCH01B5/04G01L5/10G01L5/101G01V3/082G01V1/01G01V3/00
Inventor 童仁园李青李明李雄施阁
Owner CHINA JILIANG UNIV