对淮河中游上更新统粉质粘土层地基承载力的探讨  

Discussion on Foundation Bearing Capacity of Uplifting Silty Clay Layer in the Middle Reaches of Huaihe River

作　　者：罗阳生 Luo Yangsheng

机构地区：[1]上海勘测设计研究院有限公司,中国上海200434

出　　处：《吉林水利》2019年第2期1-3,6,共4页Jilin Water Resources

摘　　要：用固结快剪试验、物理性质试验、标贯试验和静力触探试验四种不同方法来获得淮河中游地区上更新统粉质粘土层的地基承载力。结果发现,用固结快剪试验获得的地基承载力偏小许多,用物理性质试验获得的地基承载力稍微偏小,用标贯试验获得的地基承载力偏高许多。经分析,固结快剪试验中人为剔除试样中的钙结核和碎块且用原土封补是导致剪切参数偏小许多的原因,标贯试验中遇到钙结核和碎块使标贯击数显著增高是该方法获得的地基承载力偏高许多的原因。因此,建议对淮河中游地区上更新统粉质粘土层的地基承载力应主要通过静力触探方法来确定。Foundation bearing capacity of uplifting silty clay stratum in the middle reaches of Huaihe River is obtained by four different methods:consolidated quick direct shear test,physical property test,standard penetration test and static cone penetration test.It is found that the bearing capacity of the foundation obtained by the consolidated quick direct shear test is much smaller,the bearing capacity of the foundation obtained by the physical property test is slightly smaller,and the bearing capacity obtained by the standard penetration test is much higher.After analysis,calcium tuberculosis and fragments in the sample were removed and sealed with the original soil in consolidated quick shear test,which caused the shear parameters to be much smaller;The occurrence of Ca-nodules and fragments in the standard test results in a significant increase in the number of strikes,which is the reason why this method has a much higher bearing capacity.Therefore,it is suggested that the foundation bearing capacity of uplifting silty clay layer in the middle reaches of Huaihe River should be determined mainly by static cone penetration test method.

关 键 词：固结快剪试验 物理性质试验 标贯试验 静力触探试验 地基承载力 

分 类 号：TU470[建筑科学—结构工程]