土石坝隐蔽病害跨孔雷达探测实验系统设计  

An Experimental System for Hidden Defects Detection of Earth-rock Dam Based on Crosshole Ground Penetrating Radar

作　　者：唐玉 康飞[1] 宿晓辉[1] 张建涛[1] 姚遥 方天星 TANG Yu;KANG Fei;SU Xiaohui;ZHANG Jiantao;YAO Yao;FANG Tianxing(School of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]大连理工大学建设工程学院,辽宁大连116024

出　　处：《实验室研究与探索》2025年第1期60-63,共4页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(52079022);国家重点研发计划(2022YFB4703404);国家本科教学工程项目(ZL2021260)。

摘　　要：为满足土木水利学科前沿实验教学的需求,并促进学科交叉和科教融合,设计了一种基于跨孔雷达探测土石坝隐蔽病害的实验系统。该系统由大模型箱、病害模型箱以及步进频率雷达系统组成。大模型箱尺寸为2.5 m×1.5 m×1.4 m,内部填充具有一定颗粒级配的石英砂,用以模拟土石混合介质;病害模型箱放置在大模型箱中,包括方形截面和圆形截面2种。其中方形箱的尺寸为250 mm×250 mm×15 mm,用以模拟空洞和不密实工况;圆形模型箱由3个直径分别为110 mm、250 mm、400 mm的同心圆柱组成,其底部连接排水管,用以模拟渗漏工况。步进频率雷达系统由网络分析仪通过同轴电缆连接收发天线进行数据采集,并通过控制主机储存和显示数据。实验教学表明,该系统能够准确探测出土石坝内部隐蔽病害的位置和尺寸,展现出较强的学科前沿性,并有助于培养学生的创新思维和科研能力。For the requirement of the frontier experimental teaching of civil and hydraulic engineering,and to promote interdisciplinary and scientific integration,an experimental system for detecting hidden defects of earth-rock dam is designed based on cross-hole radar.The system consists of an experimental model box,two defect model boxes and a crosshole ground penetrating radar(GPR)detection system.The dimensions of the experimental model box is 2.5 m×1.5 m×1.4 m,being filled with quartz sand with certain particle gradation to simulate the earth-rock dam medium.A square-section box and a round-section box are made for the defects and placed in the experimental model box.The square-section one(250 mm×250 mm×15 mm)is utilized to simulate cavities and non-compacted defects.The round-section one,composed of three concentric cylinders with diameters of 110 mm,250 mm and 400 mm respectively and connected with a drainage pipe at the bottom of the box,is designed to simulate leakage conditions.The data acquisition of the crosshole GPR detection system is carried out by the network analyzer through the cable connection of the transceiver antenna,and the data is stored and displayed by the control host.The experimental teaching shows that the system can accurately detect the location and size of hidden defects inside the dam,and has a strong frontier of the subject,which is helpful to cultivate students’innovative thinking and scientific research ability.

关 键 词：实验系统 土石坝 隐蔽病害 跨孔雷达 

分 类 号：TN9[电子电信—信息与通信工程]