沿海地区深厚软土工程力学特性分析  

Analysis on Engineering Mechanical Characteristics of Deep Soft Soil at Coastal Area

作　　者：刘彬 徐苏静 张四俊 惠海鹏 居俊[3] LIU Bin;XU Su-jing;ZHANG Si-jun;HUI Hai-peng;JU Jun(NO.Eight Engineering Co.,Ltd.of CCCC First Highway Engineering Co.,Ltd,Tianjin 300171 China;CCCC Tunnel Engineering Bureau Co.,Ltd,Suzhou Jiangsu 215000 China;Changshu Institute of Technology,Suzhou Jiangsu 215500 China)

机构地区：[1]中交一公局第八工程有限公司,天津301701 [2]中交隧道工程局有限公司,江苏苏州215000 [3]常熟理工学院,江苏苏州215500

出　　处：《江苏建筑》2022年第3期101-104,共4页Jiangsu Construction

基　　金：国家自然科学基金项目(52078317);江苏省自然科学基金项目(优秀青年基金)(BK20211597);江苏省自然科学基金(BK20210720);江苏省高等学校自然科学研究面上项目(19KJ11580018);江苏省地质矿产勘查局科技项目(2021KY06);苏州市建设系统科研项目(2021-25,2021ZD02,2021ZD30);中交隧道工程局有限公司科技项目(8gs-2021-04);中交一公局有限公司科技项目(KJYF-2021-B-19);中铁四局科研开发计划项目(2021-19)。

摘　　要：基于我国沿海某地区深厚软土地基上工程建设难题,对此类软土工程性质进行了系统研究,采用室内土工试验测定富水软土物理性质指标。通过固结试验测定固结系数,分析其压缩特性;通过直剪实验研究其土体抗剪强度,分析此类软土力学性能。结果表明,该场地主要不良土层为淤泥层,其含水率高达50%以上,孔隙比超过1.5;天然密度分布较离散,平均值约1.65 g/cm^(3);压缩系数超过1.3,属于高压缩性软土,综合分析表明该地区淤泥层工程性质较差。Based on engineering construction problems of water-rich soft soil foundation in a coastal area of China,the engineering properties of this kind of soft soil are systematically studied.And the physical property indexes of water-rich soft soil are determined by indoor geotechnical test.The coefficient of consolidation is measured by consolidation test.And its compression characteristics are analyzed.The shear strength of soil is examined by direct shear test.And the mechanical properties of this kind of soft soil are analyzed.The results show that the main unfavorable soil layer of the site is silt layer with water content of more than 50%and pore ratio of more than 1.5.The natural density distribution is relatively discrete with an average value of about 1.65 g/cm3.The compressibility coefficient is more than 1.3 which belongs to high-pressure compressible soft soil.Comprehensive analysis shows that the engineering properties of the silt layer in this area are poor.

关 键 词：深厚软土 物理指标 力学性能 固结特性 淤泥 

分 类 号：TU411.3[建筑科学—岩土工程]