利用示踪试验分析基坑降水对周边建筑物影响  

Using Tracer Test to Analyze the Influence of Foundation Pit Precipitation on Surrounding Buildings

作　　者：郑新嵛 钱鑫 Zheng Xinyu;Qian Xin(Jianke Architectural Design Institute of Guangdong Province Co.,Ltd. Guangzhou 510010,China;Guangdong Provincial Academy of Building Research Group Co.,Ltd. Guangzhou 510500,China)

机构地区：[1]广东省建科建筑设计院有限公司,广州510010 [2]广东省建筑科学研究院集团股份有限公司,广州510500

出　　处：《广东土木与建筑》2019年第8期51-53,共3页Guangdong Architecture Civil Engineering

摘　　要：基坑降水引发周边建(构)筑物变形破坏及地面沉降是基坑工程施工过程中的常见问题,在研究区地面沉降地质调查过程中,为了直观反映区域地下水流场特征,采用示踪试验方法定性分析基坑降水对周边建筑物影响。示踪试验成果分析表明,区域地下水的流场方向由投源点(建筑群变形破坏中心位置)分别指向佛山新城CBD、东平广场西南侧与CBD结合部,证明基坑降水打破了区域地下水的均衡状态,引起了地下水的联动变化。Deformation and failure of surrounding structures or ground subsidence caused by foundation pit dewatering is a common problem in the construction process of foundation pits. In the geological survey process of land subsidence in the study area,in order to visually reflect the characteristics of regional groundwater flow field,tracer test method was used to qualitatively analyze the impact on surrounding buildings caused by foundation pit precipitation. The results of the tracer test show that the flow direction in the regional groundwater is directed by the point of origin (location of the building group deformation and destruction center) to the CBD foundation pit,the southwest side of Dongping Square and the CBD junction. It proves that the foundation pit precipitation breaks the equilibrium state of the groundwater in the area and causes the linkage change of groundwater.

关 键 词：示踪试验 基坑降水 建(构)筑物变形破坏 地面沉降 地下水 

分 类 号：TU42[建筑科学—岩土工程]