光纤传感技术在岩溶塌陷监测中的应用研究  

Application of optical fiber sensing techniques to karst collapse

作　　者：郝文杰[1,2] 杨卓静[1,2] 张青[1,2] 吕中虎[1,2] 

机构地区：[1]中国地质调查局水文地质环境地质调查中心,河北保定071051 [2]国土资源部地质环境监测技术重点实验室,河北保定071051

出　　处：《水文地质工程地质》2014年第1期134-137,共4页Hydrogeology & Engineering Geology

基　　金："十二.五"国家科技支撑计划课题(2012BAK10B05);国土资源部公益性行业科研专项(200911036);国土资源大调查项目(1212011140020;1212011120085)

摘　　要：通过对比分析岩溶塌陷监测技术的优缺点,结合前人工作经验,将BOTDR和FBG联合监测的方案应用于岩溶塌陷区岩土体变形监测中。通过对唐山陡河东岸岩溶塌陷点地质条件的分析,选取试验用纤、制定铺设方案,并对试验过程进行了详细的描述,探索了野外应用中温度补偿的方法。经过多次数据采集及处理分析得出,光纤传感技术可实现岩土体变形的多点定位,可捕获岩土体变形趋势和实现对塌陷变形边界的描述。通过FBG和BOTDR联合监测应用,可以克服两种监测手段的缺陷,从而获得塌陷体的全部信息,具有非常好的应用前景。In this paper, the advantages and disadvantages of karst collapse monitoring technology are compared. Based on the previous experience, a notion combining BOTDR with FBG to monitor soil deformation of karst collapse is put forward. The optical fiber and test project are given by analyzing geologic conditions. The whole procedure of the test is described. Based on former researches, temperature compensation methods for cables are proposed. Data collection and processing show that optical fiber sensing techniques have enormous potential in multilateration of soil deformation. They can used to describe the trend and development of the deposition layer. BOTDR combines with FBG can catch up comprehensive source of information in monitoring karst collapse.

关 键 词：岩溶塌陷 光纤传感 唐山陡河 

分 类 号：P642.26[天文地球—工程地质学]