杭州市平原地区的工程地质分区

Engineering Geological Zoning of the Plain Area of Hangzhou

杭州是典型的软土地区,桩基在工程建设中应用广泛。首先对杭州市平原地区的大量岩土工程勘察资料进行分析,总结了各工程地质层的主要物理力学参数及空间分布规律。然后,在对各工程地质层的特征进行评价的基础上,以可供选择的桩基持力层的类型为原则,将杭州市平原地区划分为3个工程地质区:硬土层+基岩区、砂砾石层+基岩区和硬土层+砂砾石层+基岩区。研究成果对于指导杭州市的岩土工程实践具有实用价值。

Hangzhou is a typical soft soil area,and piles are widely used in engineering construction.Firstly,through analysing a large number of geotechnical investigation data obtained in the plain area of Hangzhou,we summarize main physical and mechanical parameters of the soil and rock layers,and reveal the law of spatial distribution of each engineering geological layer. Secondly,on the basis of evaluating the characteristics of the main engineering geological layers,a principle of the types of available pile bearing layers is proposed to divide the plain area of Hangzhou into 3 engineering geological zones,i.e.,stiff clay layer + bedrock zone,sand-gravel layer + bedrock zone,and stiff clay layer +sand-gravel layer + bedrock zone. The research results have practical value for guiding the geotechnical engineering practice in Hangzhou.