摘要
为明确天津碱渣土的力学性质和基本参数,通过固结、直剪(慢剪、固结快剪以及快剪)、颗粒级配分析、液塑限联合测定等室内土工试验,对碱渣土试样压缩性、比重、强度参数、密度、渗透系数、颗粒级配、液塑限等进行测定。试验结果表明,碱渣土的孔隙比为4.44、含水率达198.1%、压缩模量为1.59 MPa、渗透系数为1.40×10^-5 cm/s以及较高的液、塑限。相比具有相近孔隙比、含水率等物理力学指标的黏性土和淤泥土,碱渣土的抗剪强度高、压缩性低且渗透性好。通过室内土工试验测得的碱渣土参数准确,可为数值仿真和现场试验等提供数据支持。
In order to clarify the mechanical properties and basic parameters of Tianjin soda residue soil,through consolidation,direct shear(slow shear,consolidated fast shear and fast shear),particle size distribution analysis,liquid-plastic limit combined method and other indoor geotechnical tests,soil sample compressibility,specific gravity,strength parameters,density,permeability coefficient,particle size distribution,liquid-plastic limit,etc.were measured.The test results show that the soda residue soil has a void ratio of 4.44,a moisture content of 198.1%,a compression modulus of 1.59 MPa,a permeability coefficient of 1.40×10^-5 cm/s,and high liquid and plastic limits.Compared with cohesive soil and silt soil with similar physical and mechanical indexes such as void ratio and moisture content,soda residue soil has higher shear strength,lower compressibility and better permeability.The parameters of soda residue soil measured through indoor geotechnical tests are accurate,which can provide data support for numerical simulation and field tests.
作者
王龙
吴宜鹏
范庆来
王冠妍
焉振
WANG Long;WU Yi-peng;FAN Qing-lai;WANG Guan-yan;YAN Zhen(SIF Department, Tianjin Port (Group) CO. LTD., Tianjin 300456, China;School of Civil Engineering, Ludong University, Yantai 264000, China;Tianjin Dongfang Tairui Technology Co. LTD., Tianjin 300456, China;Tianjin Research Institute for Water Transport Engineering,National Engineering Laboratory for Port Hydraulic Construction Technology, Tianjin 300456, China)
出处
《水道港口》
2020年第4期476-482,共7页
Journal of Waterway and Harbor
基金
国家重点研发计划(2016YFC0802204)
中央级公益性科研院所基本科研业务费(TKS170108)
国家自然科学基金青年项目(51809132)。
关键词
碱渣土
室内土工试验
物理力学指标
soda residue soil
indoor geotechnical test
physical and mechanical indicators
