岩溶地下工程地质环境影响区范围划定初步研究——以深圳市龙岗区基坑降水为例  

Study on the delimitation of affected zone of geological environment for karst underground engineering:taking Longgang district,Shenzhen City as an example

作　　者：吴晟堂 蒋小珍[1] 马骁 汤振 WU Shengtang;JIANG Xiaozhen;MA Xiao;TANG Zhen(Institute of Karst Geology,CAGS/Key Laboratory of Karst Collapse Prevention,CGS,Guilin,Guangxi 541004,China;China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国地质科学院岩溶地质研究所/中国地质调查局岩溶塌陷防治重点实验室,广西桂林541004 [2]中国地质大学(北京),北京100083

出　　处：《中国岩溶》2022年第5期825-837,共13页Carsologica Sinica

基　　金：国家自然科学基金(42077273);中国地质调查局项目(DD20190266)。

摘　　要：在大量建设城市地下轨道交通及城市更新工程的背景之下,我国城市岩溶地质灾害日趋严重。文章以深圳市3个岩溶地面塌陷事件为例,开展岩溶地下工程地质环境影响区的划定研究。首先运用高频岩溶地下水气压力监测技术对工程影响实际范围进行监测分析,然后结合工程施工参数、岩溶塌陷主要影响因素与水文地质试验参数,采用定性分析和量化计算的综合研究方法,推导出岩溶地下工程地质环境影响范围理论计算经验公式。结果表明:岩溶地下工程影响范围主要与渗透系数、工程深度成正比,与土层厚度成反比,推导的半定量理论公式适用于岩溶承压水条件下,可快速为缺乏地下水监测资料的岩溶地区地下工程安全建设及城市防灾减灾工作提供依据。The construction of a large number of urban underground rail transit and urban renewal projects has intensified the urban karst geological disasters in our country. As one of the first demonstration areas of national urban construction, Shenzhen has developed rapidly in terms of underground rail transit and urban renewal projects over the years, hence leading to frequent karst collapse disasters due to its location in the karst area. Therefore, the summary of the experience and lessons from the development of karst underground space is of great significance for the engineering construction in karst areas. In this thesis, a preliminary study on the delimitation of the affected zone of geological environment for karst underground engineering is conducted based on three events of karst ground collapse in Shenzhen.The affected zone of geological environment for karst underground engineering refers to the area where disasters are likely to happen due to the disturbance and damage of the rock and soil around the construction site during the construction process. The delimitation of the affected zone is not only conducive to the safe and smooth engineering construction, but also to the clear division of responsibility. The monitoring range of underground engineering construction in karst area usually reaches only tens of meters at the current stage. But when a disaster happens, the actual range influenced by engineering will often exceed hundreds of meters. Therefore, the current construction specification about the affected zone of geological environment for karst underground engineering is unreasonable and uncertain in some degree, and the relevant provisions are greatly challenged. For instance, it is stipulated that the engineering monitoring should be conducted within the plane range that is only 3 times as deep as the foundation pit during construction, and the description of the expansion of the monitoring range in the karst development area is not detailed. Therefore, the further research on the affected zone of

关 键 词：岩溶地下工程 岩溶地下水气压力监测 工程影响区 抽水试验 经验公式 

分 类 号：P642[天文地球—工程地质学]