摘要
疏浚淤泥经水力吹填形成的流态吹填土属于宾汉体,无初始结构与强度,表现出明显的流体特性,与结构性天然沉积土明显不同。因此,无法采用固态土体相关理论进行流态吹填土加固中的变形分析。为了准确预测流态吹填土变形,通过流变试验确定流态吹填土含水率范围,根据加固前后土体状态及物理性质变化提出计算流态吹填土变形的物理指标法,并通过案例分析验证了物理指标法的合理性与可靠性。结果显示,结合流变试验成果,采用物理指标法计算所得流态吹填土沉降与实测值吻合度高。最后,根据文中研究成果,对物理指标法在工程中的应用提出了一定的建议。
Fluidized slurry,made of dredged mud and formed by means of hydraulic reclamation,belongs to Bingham fluid without apparent initial structure or strength and shows obvious characteristics of fluid,which is quite different from structural natural deposits.Therefore,it is unreasonable to analyze the deformation of the fluidized slurry during reinforcement with the theories intended for solid soil.To accurately predict the deformation of the fluidized slurry,the range of water content for the fluidized slurry is defined with the help of rheology tests,physical factor method is put forward to calculate the deformation of the slurry with respect to the changes of soil state and properties during reinforcement,and a case study is performed to verify the reasonability and reliability of the physical factor method.The research results suggest a satisfied agreement between the measured data and the calculation result obtained by the physical factor method with the result of rheology test.What's more,advice is also given to the application of the physical factor method in the engineering practice according to the research results.
作者
林澍
闫澍旺
闫玥
付登锋
LIN Shu;YAN Shu-wang;YAN Yue;FU Deng-feng(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China;College of Civil Engineering and Architecture,Hainan University,Haikou,Hainan 570228,China)
出处
《中国港湾建设》
2019年第10期1-5,共5页
China Harbour Engineering
基金
国家自然科学基金项目(51709198,41877214)
天津市自然科学基金(16JCQNJC07900)
关键词
流态吹填土
流变试验
沉降计算
真空预压
fluidized slurry
rheology test
settlement calculation
vacuum preloading
