基于Hansbo渗流的平面应变固结分析  

Analysis of plane-strain consolidation based on Hansbo′s flow

作　　者：马跃 刘忠玉[2] 刘朝凡 MA Yue;LIU Zhongyu;LIU Chaofan(Xinzheng Hengtai Urban Construction Company Limited,Zhengzhou,Henan 451150,China;School of Civil Engineering,Zhengzhou University,Zhengzhou,Henan 450001,China)

机构地区：[1]新郑市恒泰城建有限公司,河南郑州451150 [2]郑州大学土木工程学院,河南郑州450001

出　　处：《河北工业科技》2024年第5期345-350,共6页Hebei Journal of Industrial Science and Technology

基　　金：国家自然科学基金(51578511)。

摘　　要：为了考察非Darcy渗流对二维地基固结过程的影响,引入Hansbo渗流方程描述饱和黏性土中的渗流规律,修正了Terzaghi-Rendulic平面应变固结方程,并给出了有限体积法数值求解格式;采用不同的Hansbo渗流参数,分析了条形荷载作用下有限深度地基的固结特性。结果表明:Hansbo渗流延缓了平面应变固结的过程,并且随着Hansbo渗流参数的增大,超静孔压的消散变得更为缓慢,因此,按Darcy渗流对二维地基进行的常规固结分析将会高估其固结速率;与Biot固结理论相比,在Terzaghi固结理论框架内,条形荷载下固结初期地基中局部的孔压增大现象并不明显。研究成果可为探寻更为准确的饱和黏性土地基沉降预测方法提供理论基础。In order to investigate the influence of non-Darcian flow on the consolidation process of two-dimensional soil layer,Hansbo′s flow equation was introduced to describe the flow law in saturated cohesive soil,the Terzaghi-Rendulic plane strain consolidation equation was modified,and the finite volume method numerical solution scheme was given.The consolidation characteristics of finite depth foundation under strip load were analyzed by using different Hansbo′s flow parameters.The results show that Hansbo′s flow retards the plane strain consolidation process,and the excess pore pressure dissipates more slowly with the increase of Hansbo′s flow parameters.Therefore,the conventional consolidation analysis of two-dimensional soil layer based on Darcian flow will overestimate the consolidation rate.In addition,compared with Biot′s consolidation theory,the local pore pressure increase in the initial stage of consolidation under strip load is not obvious in the Terzaghi consolidation theory framework.The research results can provide a theoretical basis for exploring a more accurate settlement prediction method for saturated cohesive soil layer.

关 键 词：地基基础工程 平面应变固结 饱和黏性土 Hansbo渗流 有限体积法 

分 类 号：TU432[建筑科学—岩土工程]