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Whole-process monitoring of sinkhole collapse based on distributed optical fiber strain-vibration joint system and its case study in railway subgrade

机译：基于分布式光纤应变 - 振动接头系统的污水塌陷全程监测及铁路路基案例研究

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摘要

Sinkhole is a unique geological disaster, which has the characteristics of concealment in space, accumulation in the development process and sudden collapse caused by roof instability, and the whole development process contains deformation and vibration information. This paper presents a distributed optical fiber strain-vibration joint system based on distributed optical fiber strain and vibration sensing techniques for collapse monitoring. Firstly, a multi-parameter distributed fiber optical sensor is developed and its strain-vibration sensing characteristics are studied. And then, one model test and a case study related to collapse monitoring are carried out, the multi-parameter distributed optical fiber sensors are used to monitor the development of the sinkholes. In comparison of the strain and the vibration data, the strain can be used to evaluate the subsidence, and the vibration signal can be used to monitor the sudden collapse, which proves it is a promising solution for wholeprocess monitoring of sinkhole collapse.
机译：下沉是一个独特的地质灾害，具有隐藏在太空中的特点，在屋顶不稳定引起的开发过程中积累和突然崩溃，整个开发过程包含变形和振动信息。本文介绍了基于分布式光纤应变的分布式光纤应变 - 振动接头和用于塌陷监测的振动传感技术。首先，开发了多参数分布式光纤光学传感器，研究了其应变振动感测特性。然后，进行一个模型测试和与崩解监测相关的案例研究，使用多参数分布式光纤传感器来监测下沉孔的开发。在菌株和振动数据的比较中，应使用应变来评估沉降，并且振动信号可用于监测突然崩溃，这证明了这是一种有希望的污水监测污水监测的沉降崩溃。

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