Application of comprehensive geophysical prospecting method in the research on the location of typical obstacles under urban roads
In the reconstruction and expansion project of an urban trunk road,in order to accurately determine the spatial position of the underground raw water tank culvert and its auxiliary concealed bridge,which protecting the pipe,and ensure the accurate design and smooth construction of Viaduct Pile Foundation,several joint engineering geophysical exploration methods such as high-density electrical method,seismic surface wave method,ground penetrating radar method,and GEM-2 multi-fre-quency electromagnetic method are adopted which in order to compare the effectiveness,and summarize the technical points,and in order to accumulate technical data and engineering experience for the positioning research of typical obstacles in the urban roads.The underground raw water tank culvert and protection bridge are reinforced concrete,with a special engineering struc-ture which has obvious physical properties different from the stratum.The results show that the plane boundary of the pipe-protecting bridge is clearly detected by GEM-2 multi-frequency electromagnetic method;and the spatial positions of the pipe-protecting bridge and the raw water tank culvert are delineated effectively by high-density electrical method and seismic surface wave method;and the ground penetrating radar(GPR)has detected the boundary of the pipe-protecting bridge,and delineated the spatial relationship between the raw water tank culvert and the pipe-protecting bridge.These results provide a practical ba-sis and solution for the Geophysics Investigation of similar urban road engineering problems.
main trunk roadpipe-protection bridgeraw water tank culvertmulti-frequency electromagnetic methodhigh density electrical methodseismic surface wave methodground penetrating radar
国家科技期刊平台
NSTL
万方数据
维普
