淮安市区黄泛冲积粉土工程特性探讨  

Discussion on engineering characteristics of alluvial silt by the Yellow River in Huai'an

作　　者：汪名鹏 

机构地区：[1]江苏省水文地质工程地质勘察院,江苏淮安223005

出　　处：《工程勘察》2012年第2期16-20,共5页Geotechnical Investigation & Surveying

摘　　要：基于大量的勘探资料、土工试验和原位测试数据,本文对淮安市区浅层黄泛冲积粉土的分布特征和工程特性进行了探讨。采用数理统计方法,对区内黄泛冲积粉土的物理力学指标进行了统计,发现粉土不同物理力学指标的变异系数差别较大,室内指标不能完全反映粉土的实际特性。进而对淮安市区黄泛冲积粉土静力触探试验锥尖阻力qc、标准贯入试验击数N值与载荷试验实测得到的地基承载力特征值fak进行统计分析,并分别对qc、N与fak进行相关性分析,拟合了相应的经验公式。最后对饱和粉土液化特性进行了探讨,并提出了相应的工程防治措施。Based on the large amount of data from geological explorations, geotechnical tests and field survey, the distribution of the shallow silt and the engineering characteristics of alluvial silt by the Yellow River in Huai＇ an are discussed. By means of the mathematical statistical methods, the physical and mechanical indices are statistically analyzed. It is found that the variation coefficients of the parameters of alluvial silt are different, and the indoor indices can not fully reflect the actual engineering characteristics of alluvial silt. The N-values （standard penetration tests） and qc （c^ne penetration tests） for alluvial silt by the Yellow River in Huai＇ an are compared with the fak from load tests. Through the correlation analysis between the N-value and fak, and between qc and fak, the empirical formula is obtained where there is high correlation between them. Finally, the liquefaction characteristics of saturated silt are studied, and some engineering prevention measures are put forward.

关 键 词：冲积粉土 工程特性 承载力 回归分析 淮安市 

分 类 号：TU442[建筑科学—岩土工程]