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A monitoring device for subsidence and deformation of railway subgrade foundation in karst area and goaf area

A technology of railway subgrade and monitoring device, which is applied in the field of foundation soil survey, material magnetic variables, infrastructure engineering and other directions, can solve problems such as difficulty in manual measurement, achieve the effect of easy measurement quality and avoid mutual interference

Active Publication Date: 2017-09-12
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention proposes a monitoring device for subsidence and deformation of railway subgrades in karst areas and goaf areas. Accuracy and safe operation of trains without compromising structural integrity

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  • A monitoring device for subsidence and deformation of railway subgrade foundation in karst area and goaf area
  • A monitoring device for subsidence and deformation of railway subgrade foundation in karst area and goaf area
  • A monitoring device for subsidence and deformation of railway subgrade foundation in karst area and goaf area

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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0023] refer to Figure 1 ~ Figure 3 , a monitoring device for subsidence and deformation of railway subgrades in karst areas and goaf areas, comprising an inductive strain gauge 1 and an inductive sensor tester, the inductive strain gauge 1 comprising an upper testing device 1.1, a middle connecting rod 1.2, the lower fixing device 1.3 and the flange 1.4, wherein,

[0024] The lower fixing de...

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Abstract

The invention discloses a monitoring device for collapse deformation of a railroad bed and a foundation of a karst area and a goaf. The monitoring device comprises an inductance type stainometer and an inductance type sensor tester. The inductance type stainometer comprises an upper testing device, a middle connection rod, a lower fixing device and a flange plate. When a karst cave top plate or a goaf cave top plate subsides, an induction coil can be driven to subside synchronously. When the railroad bed subsides, a magnet can be driven to subside synchronously. When sedimentation of the railroad bed and sedimentation of the karst cave top plate or the goaf cave top plate are different, the magnet and the induction coil are mutually cut to generate current, and the sedimentation differential value between the karst cave top plate or the goaf cave top plate and the railroad bed is obtained through the induction type sensor tester. The device is located between the bottom of the railroad bed and the foundation and does not need to penetrate through the railroad bed, thereby avoiding mutual interference with filling of the railroad bed in the construction process and not affecting integrality of the railroad bed and tracks or safe operation of a train.

Description

technical field [0001] The invention belongs to the technical field of foundation deformation monitoring, and more specifically relates to the monitoring of subsidence deformation of railway subgrades in karst areas and goaf areas. Background technique [0002] my country has a vast territory and complex and diverse geological conditions. The construction of railway subgrades inevitably passes through karst areas and goafs that are prone to collapse. Although certain foundation reinforcement measures are taken, there is still the possibility of subsidence due to the development of karst and the irregular distribution of small mining goafs. When the foundation collapses, the upper railway embankment loses its support and collapses, resulting in uneven settlement of the railway embankment, affecting the smoothness of the railway, and in severe cases, affecting the safe operation of the train. Therefore, it is necessary to observe the subsidence of the subgrade of the railway ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/72E02D1/08
CPCE02D1/08
Inventor 郭建湖李小和赵新益姚洪锡李巍王勇刚杨辉建
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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