综合物探方法和检测技术在大坝渗漏检测中的应用

Application of Comprehensive Geophysical Exploration Method and Detection Technology in Dam Seepage Detection

伪随机流场法在大坝渗漏检测中应用广泛,也取得了极为突出的效果,但单一使用该方法往往无法精准找到大坝渗漏点和渗漏通道。本文在使用伪随机流场法的基础上,结合水下机器人、钻孔全景图像、地震波CT等多种物探方法和检测技术,以实现对大坝渗漏点和渗漏通道的全面、精准检测。首先,使用伪随机流场法,圈定大坝渗漏的隐患区;其次,对已检测得的大坝水下渗漏区,使用水下机器人搭载设备进行摄影拍照、二维声纳成像、喷墨示踪剂追踪检测,确定水下大坝渗漏点;最后,在地面钻孔开展地震波CT成像和钻孔全景图像,找出大坝发育的结构面、渗漏点。本文方法应用在川西某大坝渗漏检测中,精准找到了大坝渗漏点,确定了大坝存在的多条渗漏通道,在实际应用中取得了良好的效果。该应用成果对同类大坝渗漏检测具有借鉴意义。

Although pseudo-random flow field method has been widely used in dam leakage detection and has achieved outstanding results,the sole use of this method often fails to accurately identify the dam leakage point and leakage channel.This paper,based on the pseudo-random flow field method,integrates the underwater robot,borehole panoramic image,seismic wave CT and other geophysical exploration methods and detection techniques to achieve a comprehensive and accurate detection of dam leakage points and leakage channels.Firstly,the pseudo-random flow field method is used to delineate the latent area of dam leakage.Secondly,for the detected underwater leakage area of the dam,the underwater robot is used to carry out photography,two-dimensional sonar imaging,and inkjet tracer tracking and detection to determine the seepage point of the underwater dam.Finally,the seismic wave CT imaging and borehole panoramic images are carried out to identify the structural plane and leakage point of the dam.The method presented in this paper has been applied to the seepage detection of a dam in western Sichuan,and has accurately detected the seepage point of the dam and identified several seepage channels existing in the dam,and achieved good results in practical application.The application results can be used for reference to the of similar leakage detection.