堆石坝内部二维变形一体化分布式监测技术试验研究  

Experimental research on integrated distributed monitoring technology of twodimensional deformation in rockfifi ll dam

作　　者：吴哲辉 何宁[1,2] 姜彦彬 孔洋 槐伟 WU Zhehui;HE Ning;JIANG Yanbin;KONG Yang;HUAI Wei(Nanjing Hydraulic Research Institute,Nanjing 210024,China;Key Laboratory of Reservoir and Dam Safety,Ministry of Water Resources,Nanjing 210024,China;School of Architectural Engineering,Jinling Institute of Technology,Nanjing 211169,China)

机构地区：[1]南京水利科学研究院,江苏南京210024 [2]水利部水库大坝安全重点实验室,江苏南京210024 [3]金陵科技学院建筑工程学院,江苏南京211169

出　　处：《水利信息化》2025年第2期56-63,共8页Water Resources Informatization

基　　金：国家重点研发计划项目(2022YFC3005502);水利部水库大坝安全重点实验室开放基金项目(YK323008);南京水利科学研究院研究生学位论文基金项目(Yy324004)。

摘　　要：随着中国筑坝技术的迅猛发展,传统测量手段难以满足高堆石坝内部变形监测的技术要求,亟须改进坝体内部变形监测技术。采用二维变形一体化分布式监测技术,将相邻测点间的水平位移和沉降变形转化为监测单元内部的光纤应变,在不同条件下开展多种二维变形调节状态的室内测试,对比V型和X型2种光纤布设工艺的监测效果,2种布纤方式下47组试验测得的监测单元水平位移和沉降值绝对误差均为毫米级,且X型布纤测试结果水平位移和沉降值中误差更小。分析实际堆石坝工程案例的内部变形观测资料,开展室内断面连续监测模拟试验,2种布纤方式下的室内二维变形一体化监测试验结果与现场实测堆石坝内部变形数据的曲线形式均有较高吻合度。研究结果可提高二维变形一体化分布式监测技术的精度,验证光纤保护结构的可行性,为该技术应用于堆石坝内部变形监测提供参考。With the rapid development of dam construction technology in China,traditional measurement methods are no longer able to meet the technical requirements for internal deformation monitoring of high rockfill dams.Therefore,it is urgent to improve the monitoring technology for internal deformation of rockfill dams.The two-dimensional integrated distributed monitoring technology was used to convert the horizontal displacement and settlement deformation between adjacent measurement points into optical fiber strain within the monitoring unit.Various indoor tests under different conditions were conducted to adjust the two-dimensional displacement conditions of the sensingfiber.The monitoring effects of V-type and X-typefiber layout methods were compared.The absolute errors of horizontal displacement and settlement values in 47 test monitoring units under bothfiber layout methods were at the millimeter level,with the root mean square errors of horizontal displacement and settlement values being smaller in the X-typefiber layout.The actual internal deformation observation data from rockfill dam engineering cases were analyzed,and continuous indoor section monitoring simulation tests were carried out.The indoor two-dimensional deformation integrated monitoring test results under bothfiber layout methods showed high consistency with the curve forms of the internal deformation data of the rockfill dam measured on-site.The research results improve the accuracy of the distributed opticalfiber two-dimensional deformation monitoring technology,verify the feasibility of the opticalfiber protection structure,and provide a reference for applying this technology to internal deformation monitoring of rockfill dams.

关 键 词：二维变形监测 一体化 分布式光纤传感技术 布里渊光时域分析技术 室内试验 误差分析 堆石坝 

分 类 号：TV641.4[水利工程—水利水电工程] TU413[建筑科学—岩土工程]