武汉典型黏土物理力学特性试验研究  

Experimental study on the physical and mechanical properties of Wuhan clays

作　　者：李忠超 刘慕淳 贾琪 冯恒 陈曈 Li Zhongchao;Liu Muchun;Jia Qi;Feng Heng;Chen Tong(Wuhan Municipal Construction Group Co.,Ltd.,Wuhan 430023,China;College of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]武汉市市政建设集团有限公司,武汉430023 [2]湖南大学土木工程学院,长沙410082

出　　处：《工程勘察》2023年第9期8-13,47,共7页Geotechnical Investigation & Surveying

基　　金：湖南省自然科学基金面上项目(2021JJ30119);武汉市市政建设集团有限公司隧道工程公司科研课题。

摘　　要：针对武汉地区典型黏土,开展了基本物性试验和标准一维固结试验,获得了其含水量、孔隙比、压缩模量、先期固结压力及固结系数等物理力学指标,揭示了武汉黏土与上海和宁波等地区软黏土物理力学性质的差异。此外,通过采用Casagrande法和Becker法分别计算各土层先期固结压力,结果发现,由于一维压缩e-lgp曲线平整光滑、没有明显拐点,Becker法求解其先期固结压力更为准确。以上研究可为武汉地区岩土工程设计参数的选取提供参考。Laboratory tests on physical properties and one-dimensional consolidation tests are conducted to obtain the physical and mechanical parameters of Wuhan clays,such as the water content,the void ratio,compression modulus,pre-consolidation pressure and consolidation coefficient.The differences between the properties of Wuhan clays and soft clays in Shanghai and Ningbo are compared.In addition,the preconsolidation pressure of soils is calculated by Casagrande′s method and Becker′s method respectively.It is found that Becker′s method is more accurate to determine the pre-consolidation pressure for smooth e-lgp curves without obvious inflection points.The research can provide reference for the selection of geotechnical parameters for the geotechnical engineering design in Wuhan.

关 键 词：武汉黏土 固结试验 物理力学特性 先期固结压力 

分 类 号：TU41[建筑科学—岩土工程]