基于地震波跨孔CT岩溶塌陷灾害调查应用研究  被引量:1

Application of Cross-hole Seismic Tomography Method in Sinkhole Hazard Investigations in Karst Terrain

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作  者:王智强 郭磊 WANG Zhiqiang;GUO Lei(Shenzhen Real Estate Assessment Center,Shenzhen Geo-Environmental Monitoring Center,Shenzhen 518040;Shenzhen Urban Public Safety and Technology Institute Co.Ltd.,Shenzhen 518046)

机构地区:[1]深圳市自然资源和不动产评估发展研究中心(深圳市地质环境监测中心),广东深圳518040 [2]深圳市城市公共安全技术研究院有限公司,广东深圳518046

出  处:《土工基础》2022年第6期941-945,共5页Soil Engineering and Foundation

摘  要:随着城市地下空间开发利用程度逐渐增大,因人类工程活动引发的岩溶塌陷灾害日趋频发。土洞和溶洞均发育在地下且发育规律复杂,常规方法难以探明其发育规律及发育程度。为降低岩溶塌陷灾害对人类生命财产的威胁,以深圳市某岩溶强发育区为例,采用跨孔CT法,获取了岩溶探测成果的二维剖面,直观地展示了溶洞、土洞的空间位置及形态,提升了解释成果的可读性。试验探明了片区内溶洞及土洞的分布范围及发育规律,并与钻探成果进行了验证。根据现场调查成果结合区域地质资料分析了片区岩溶强发育的原因,提出了应急治理措施建议。研究成果可为城市岩溶塌陷防治工作提供基础数据。With the increasing utilization of the urban underground space,the karst sinkhole hazards caused by the human activities including engineering activities are becoming more and more frequent.Both soil and rock cavities in the karst terrain are developed underground and their evolution mechanisms are complicated,so it is difficult to detect their evolution mechanisms and degree of development by conventional methods.To reduce the threat of karstic collapse hazards to human life and property loss,a well-developed karst terrain in Shenzhen City was used as an example.A two-dimensional section of karst exploration results was obtained by the cross-hole seismic tomography method,which is visually demonstrated the spatial location and morphology of soil and rock cavities.The tomography results also improved the visualization of interpreted results.The test results identified the distribution range and development pattern of soil and rock cavities and rock pinnacles in the area,and these results were validated with the test boring drilling results.Based on the results of the field investigation combined with the regional geological data,the causes of strong karst development in the area are analyzed and emergency management measures are proposed in the paper.The results also provide background data for the minimization and control of the karst collapse in the city.

关 键 词:层析成像 岩溶 地面塌陷 城市地质灾害 

分 类 号:P642[天文地球—工程地质学]

 

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