哈尔滨商业大学学报（自然科学版）2023，Vol.39Issue(6)：702-708,7.
基于高空间分辨率BOTDA的土体沉降监测研究
Study on soil settlement monitoring based on high spatial resolution BOTDA
摘要
Abstract
Land subsidence has been one of the most harmful geological disasters because of its imperceptible and serious consequences.In order to effectively prevent the land subsidence disaster,the displacement monitoring of soil will become particularly important when the land subsidence occurs.Distributed optical fiber sensing technology has become one of the means to obtain soil settlement and displacement information because it can be used for high-sensitivity distributed monitoring.On the basis of fully considering the settlement coordination between the directly buried strain sensing optical fiber and the surrounding soil,the high spatial resolution Brillouin optical time domain analysis(BOTDA)technology was used to measure the strain distribution of the optical fiber under test when the soil settlement occurs,and the measured strain was converted into displacement by the"strain-displacement"calculation model,thus the measured displacement was achieved and compared with the actual settlement displacement of the soil.The experimental results show that the measured settlement displacement was in good agreement with the actual settlement displacement of the soil at the stage of good coupling between the optical fiber and the soil,and laying ground anchors on the optical fiber can improve the coupling performance between them,so as to obtain better settlement monitoring effect.The criterion of coupling deformation degree between the fiber and soil obtained from the experiment can be used to quantitatively evaluate the coupling degree between fiber and soil during the process of settlement.关键词
分布式光纤传感/高空间分辨率BOTDA/土体沉降监测/应变-位移计算模型/耦合性能Key words
distributed optical fiber sensing/high spatial resolution BOTDA/soil settlement monitoring/strain-displacement calculation model/coupling performance分类
数理科学引用本文复制引用
李林海,郭文娟,丁强,王光辉,高金良,关鹏,隋景林,张洪英,刁美玲..基于高空间分辨率BOTDA的土体沉降监测研究[J].哈尔滨商业大学学报（自然科学版）,2023,39(6):702-708,7.基金项目
黑龙江省自然科学基金(LH2020F036) （LH2020F036）
