物探与化探2025，Vol.49Issue(2)：520-528,9.DOI:10.11720/wtyht.2025.1146
微动探测技术在盾构隧道穿越城区岩溶地层中的应用
Application of microtremor survey technology in shield tunnels passing through urban karst formations
摘要
Abstract
Due to dense buildings and structures and insufficient drilling surveys,the construction of shield tunnels passing through ur-ban karst formations that host dense buildings faces significant risks of surface fracturing and subsidence caused by karst development.Hence,this study employed the microtremor survey technology with strong anti-interference capability in complex environments to ad-dress this challenge.Based on the technology,it analyzed the structural characteristics of wave velocities in underground rock forma-tions through the inversion of the apparent shear-wave velocity profile.Combined with geological drilling data,it inferred the bedrock interface,highly weathered unconsolidated formations,and karst cave anomaly zones.Key findings are as follows:(1)The apparent shear-wave velocities in the study area gradually increased from the shallow to deep formations.Formations with wave velocities above and below 300 m/s were inferred to be limestone and Quaternary formations,respectively,with the rock-soil interface at depths approx-imately between 10～15 m;(2)Seven low-value anomaly zones of apparent shear-wave velocities ranging from 150～240 m/s were in-terpreted.They were presumed to be unconsolidated formations or karst caves at depths ranging from 8～30 m.Relying on strong anti-interference and high accuracy,the microtremor survey technology can accurately identify the shear-wave velocity structures of under-ground profiles,lithologic interfaces of formations,unconsolidated formations,and karst cave anomalies.Therefore,the technology is effective in the geological exploration of urban dense building areas with karst development.关键词
微动探测/岩溶发育/密集建筑物/溶洞异常Key words
microtremor survey/karst development/dense buildings/karst cave anomaly分类
天文与地球科学引用本文复制引用
张中,冯文成,林杨..微动探测技术在盾构隧道穿越城区岩溶地层中的应用[J].物探与化探,2025,49(2):520-528,9.基金项目
广州市建筑集团有限公司科技计划资助项目(BH20220401510,2022-KJ025,BH20220401513,2022-KJ037) （BH20220401510,2022-KJ025,BH20220401513,2022-KJ037）
