【作者】 师颖；

【导师】 陆培毅；

【作者基本信息】 天津大学 ， 结构工程， 2004， 硕士

【摘要】 基于三维非稳定渗流的基本方程,应用伽辽金法对其进行了离散,得到了有限元控制方程。应用Seep3D对三维非稳定渗流进行模拟。通过对基坑降水的分析,总结各方面因素,提出了基坑降水特征值的概念。此特征值可以较全面地概括基坑降水的效果,为基坑降水的量化分析提供了依据。通过调整基坑降水的参量,对基坑降水进行了大量的计算,得到了各参变量对降水特征值的影响,并对其进行了系统地分析,提供了合理的确定这些参量的依据,得到的结论可为实际基坑降水工程所参考。更多还原

【Abstract】 A FEM(Finite Element Method) governing equation for 3-D unsteady seepage problems, based on basic seepage equation, is presented by applying the Galerkin method and can be applied in simulating 3-D seepage problems. In solving the transint seepage problems, the software Seep3D is used.The conception—dewatering eigenvalue,which can externalize the effects of seepage on fondation excavation and provide a criterion for quantity analysis, is put forward by analyzing excavation processes and generalizing all effective factors.Through change the values of varies of parameters, The effects of the parameters on the dewatering eigenvalues are obtained by a large mount of calculations on seepage on fundation pit excavation. By systematical analysis, the criterion on determining the parameters rationally is obtained and can be refered in pratical fundation pit engineerings.更多还原