多道瞬态瑞雷面波法在城市工程地下障碍物探测中的应用  

Application of Multi-channel Transient Rayleigh Surface Wave Method in Detection of Underground Obstacles in Urban Engineering

作　　者：郑晓雯 ZHENG Xiaowen(Shanghai Key Laboratory of Engineering Structure Safety,SRIBS,Shanghai 200032,China)

机构地区：[1]上海市建筑科学研究院有限公司上海市工程结构安全重点实验室,上海200032

出　　处：《城市勘测》2024年第1期195-199,共5页Urban Geotechnical Investigation & Surveying

基　　金：2020年上海市科委优秀技术带头人计划项目(20XD1432400);上海建科集团科研创新项目(KY10000038.20210052)。

摘　　要：在城市工程施工中常常由于遇到地下障碍物而产生不良后果,因此在工程设计与施工前会对施工场地地下障碍物进行探测。与常规的地震反射波法或折射波法相比,多道瞬态瑞雷面波法因瑞雷波在垂向激震产生的波组中能量最强而易于识别、对场地的要求不高、有一定的穿透能力且浅层分辨率高等优势,在解决浅层工程地质问题方面具有重要的作用。本文结合工程实例,阐述了多道瞬态瑞雷面波法的探测原理以及在城市工程地下障碍物探测中的应用。结果表明瑞雷面波法可以对工程场地地下存在的含混凝土块、抛石等不良地质体的杂填土层的分布和埋深进行了准确探测,在城市工程地下障碍物探测中有良好的效果及前景。In urban engineering construction,adverse consequences often arise due to encountering underground obstacles,so underground obstacles in the construction site will be detected before engineering design and construction.Compared with conventional seismic reflection or refraction methods,multi-channel transient Rayleigh wave method is easy to identify due to the strongest energy of Rayleigh waves in the wave group generated by vertical excitation,low requirements for the site,certain penetration ability,and high shallow resolution.It plays an important role in solving shallow engineering geological problems.Combining with engineering examples,this paper expounds the detection principle of multi-channel transient Rayleigh surface wave method and its application in the detection of underground obstacles in urban engineering.The results show that the Rayleigh surface wave method can accurately detect the distribution and buried depth of miscellaneous soil layers containing unfavorable geological bodies such as concrete blocks and riprap existing underground in the engineering site,and has good effects and prospects in the detection of underground obstacles in urban engineering.

关 键 词：多道瞬态瑞雷面波法 地下障碍物 混凝土块 抛石 频散曲线 相速度 

分 类 号：P631.4[天文地球—地质矿产勘探]