广州大坦沙岩溶塌陷区域覆盖层特征研究  

Study on the Characteristics of Overburden in Karst Collapse Area of Datansha in Guangzhou

作　　者：黄剑宇[1] 黄佳铭[1] Huang Jianyu;Huang Jiaming(Guangzhou Urban Planning and Design Survey Research Institute Guangzhou 510060,China)

机构地区：[1]广州市城市规划勘测设计研究院,广州510060

出　　处：《广东土木与建筑》2020年第9期20-23,共4页Guangdong Architecture Civil Engineering

基　　金：广州市政府计划项目:广州市多要素城市地质调查子项目-广州市地面沉降及岩溶地面塌陷调查评价及规划应对策略。

摘　　要：广州大坦沙地区为典型的岩溶塌陷区,由于高强度的地下开发,近年连续发生地面塌陷。基于已有的钻孔资料及塌陷区的分布位置,着重对塌陷区覆盖层结构、厚度及底层土层特性进行分析。发现覆盖层的结构主要以下黏上砂多元结构为主,厚度大约为20~30 m,底层土层主要为黏性土。The Datansha area of Guangzhou is a typical karst subsidence area.Due to the high intensity of underground development,subsidence has occurred continuously in recent years.Based on the existing borehole data and the distribution of the subsidence area,this paper focuses on the analysis of the structure,thickness and characteristics of the subsoil characteristic of the subsidence area.It is found that the structure of the overburden is mainly composed of clay and sand,with a thickness of about 20~30 m,the subsoil is mainly clay.

关 键 词：岩溶塌陷 覆盖层结构 覆盖层厚度 底层土层特性 

分 类 号：TU411.7[建筑科学—岩土工程]