综合物探方法在城市道路典型障碍物定位研究中的应用  

Application of comprehensive geophysical prospecting method in the research on the location of typical obstacles under urban roads

作　　者：杨超 YANG Chao(Shanghai Yuanyi Investgation&Desgin Co,.LTD,Shanghai,201203,China)

机构地区：[1]上海元易勘测设计有限公司,上海201203

出　　处：《物探化探计算技术》2024年第2期215-223,共9页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：在城市主干道路改扩建工程中,为准确测定地下原水箱涵及其附属隐伏护管桥的空间位置,保障高架桥梁桩基的准确设计及顺利施工,采用高密度电法、地震面波法、探地雷达法、GEM-2多频电磁法等几种常用工程物探方法,旨在对比方法有效性,总结技术要点,为城市道路典型障碍物定位研究积累技术资料及工程经验。地下原水箱涵道及其附属隐伏护管桥为钢筋混凝土,具有特殊的工程结构,与地层具有明显的物性差异,这里利用GEM-2多频电磁法清晰地准确地探测到了护管桥的平面边界,高密度电法、地震面波法较为有效地圈定了护管桥及原水箱涵的空间位置,探地雷达法清晰地探测到了护管桥区域,并且精细地刻画了原水箱涵及护管桥的空间关系,这些成果为类似城市道路工程问题的地球物理勘察提供了实践依据及解决方案。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-frequency 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 structure 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 basis and solution for the Geophysics Investigation of similar urban road engineering problems.

关 键 词：城市主干道路 护管桥 原水箱涵 多频电磁法 高密度电法 地震面波 探地雷达 

分 类 号：P631.3[天文地球—地质矿产勘探]