未打穿竖向排水井地基固结分析  

Consolidation Analysis of Ground with Partially Penetrated Vertical Drains

作　　者：刘加才[1] 高鸿[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009

出　　处：《中国公路学报》2009年第2期12-17,共6页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50608038/E0806)

摘　　要：为了对现有未打穿竖向排水井地基固结理论进行改进,使其解更趋于合理,对现有未打穿竖向排水井地基固结理论渗透面连续条件的不合理性进行了研究,提出渗透面上的连续条件改进方法,并给出了改进后的固结解。通过算例分析了现有解与所提出的改进解的差异,并采用基于Biot固结理论的轴对称有限元数值分析方法,对一算例进行了分析。结果表明:改进解可以反映渗透面上的径向水力梯度,孔压沿深度方向分布也更为合理,且改进解也更加精确。Aimed at the problem that vertical drains partially penetrated into the soft ground have to be installed in order to improve the existing consolidation theory of soft ground with partially penetrated vertical drains so that the solution of it can be more coincident with the actual fact. The irrationality of the continuity condition at the plane of penetration in the existing consolidation theory of soft ground with partially penetrated vertical drains was studied. More reasonable continuity conditions were used in place of the old ones and the improved solution of consolidation of ground with partially penetrated vertical drains was offered. The difference of existing solution and the improved solution presented in the paper was analyzed by case. Finally, finite element method based on Biot consolidation theory was used to analyze the same case. The results show that the improved solution which is more rational and accurate can reflect the radial hydraulic gradient on the plane of penetration and the pore water pressure along depth is more coincident with the actual fact.

关 键 词：道路工程 软土地基 有限元方法 竖向排水井 固结 

分 类 号：U416.1[交通运输工程—道路与铁道工程]