水利水电科技进展2025，Vol.45Issue(2)：31-37,7.DOI:10.3880/j.issn.1006-7647.2025.02.005
基于土工膜透声特性的膜下垫层渗透变形声波特征试验研究
Experimental study on acoustic characteristics of seepage deformation of geomembrane cushion based on sound transmission characteristics of geomembrane
摘要
Abstract
To address the issues of local damage and leakage in geomembranes,which can lead to seepage deformation in the geomembrane cushion,a study on acoustic monitoring of seepage deformation of geomembrane cushion is proposed to be carried out based on the excellent sound transmission properties of geomembranes.A laboratory experimental study on the sound transmission properties of geomembranes and the acoustic characteristics of seepage deformation of geomembrane cushion was conducted using a self-designed testing apparatus.The results show that both PVC and PE geomembranes exhibit a certain degree of sound transmission,with better sound transmission effect for low-frequency sound waves than that for high-frequency sound waves.The acoustic energy of the seepage deformation of geomembrane cushion is mainly concentrated in three frequency bands:low(below 250 Hz),medium(500 to 750 Hz),and high(1000 to 1250 Hz),with the highest energy in the low-frequency band.The maximum instantaneous sound wave intensity during the seepage deformation of the geomembrane cushion is 119.29 dB,while the stable sound wave intensity can still be maintained at around 90 dB,both of which are greater than the observation results of the underwater background noise in relevant water areas under undisturbed conditions.关键词
土工膜/局部破损/垫层/渗透变形/声学监测Key words
geomembrane/local defects/cushion/seepage deformation/acoustic monitoring分类
水利科学引用本文复制引用
田晓丹,姜晓桢,殷友超,石泽译..基于土工膜透声特性的膜下垫层渗透变形声波特征试验研究[J].水利水电科技进展,2025,45(2):31-37,7.基金项目
国家自然科学基金项目(51509165,51709114) （51509165,51709114）
国家重点研发计划项目(2021YFC3000103) （2021YFC3000103）
马鞍山市水工程健康诊断与修复技术研究中心建设项目(2023msgc001) （2023msgc001）
