循环荷载下考虑径-竖向渗流的竖井地基固结  

Consolidation of Shaft Foundation Considering Radial-Vertical Flow under Cyclic Loading

作　　者：严思 苗永红 殷杰[2] YAN Si;MIAO Yonghong;YIN Jie(China Railway 20th Bureau Group First Engineering Co.,Ltd.,Suzhou,Jiangsu 215000,China;Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]中铁二十局集团第一工程有限公司,江苏苏州215000 [2]江苏大学土木工程与力学学院,江苏镇江212013

出　　处：《昆明理工大学学报（自然科学版）》2023年第5期168-178,共11页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金面上项目(51978315)。

摘　　要：基于土体压缩性和渗透性的非线性关系,结合土体中的径-竖向渗流以及径向渗透系数的变化,建立了竖井地基在循环荷载作用下的固结控制方程,采用分离变量法求得解析解.通过将本文的退化解与已有解答进行比较,验证了本文解答的正确性.基于本文解答分析了不同参数对地基固结性状的影响.通过实际工程与本文解答进行对比,表明所提解答能够有效预测储罐在使用期间的沉降.分析表明:不同径向渗透模式和竖井渗透系数的变化对平均固结度达到稳定状态的时间有较大影响;间歇期参数β和加载参数α对平均固结度的稳定值有较大影响,β和α越小,在相同时间内荷载产生的能量越多,从而导致平均固结度的增加.Based on the nonlinear relationship between soil compressibility and permeability,as well as considering the effects of radial and vertical seepage and changes in radial permeability coefficient,this study establishes a consolidation control equation for shaft foundations under cyclic loading,which is solved analytically.The correctness of the proposed solution is verified by comparing it with existing solutions.Using this solution,the influence of various parameters on foundation consolidation properties is analyzed.Comparison between the proposed solution and actual engineering results shows that the proposed solution can effectively predict the settlement of storage tanks during use.The analysis demonstrates that different radial permeability modes and shaft permeability coefficients greatly affect the time for the average degree of consolidation to reach a steady state.The interval parameter β and the loading parameter α significantly influence the stable value of the average degree of consolidation;smaller β and α generate more energy during loading over the same period,resulting in an increased average degree of consolidation.

关 键 词：竖井地基 径-竖向渗流 井阻 解析解 循环荷载 

分 类 号：TU472[建筑科学—结构工程]