%0 Journal Article
%T 衡重式挡土墙外倾对山区公路拓宽路基沉降的影响
%A 蒋鑫
%A 
%A 陈滔
%A 吴玉
%A 朱奇炯
%A 耿建宇
%A 邱延峻
%J 湖南大学学报(自然科学版)
%D 2016
%X 山区公路路基单侧拼接式拓宽改建多下设包括衡重式挡土墙在内的支挡建筑物于新路基外侧.运用Phase2有限元软件，引入Joint单元，构建可精细描述土-墙相互作用的数值模型，采用两步走、墙面施加非零位移约束方式模拟挡土墙平动加绕墙趾转动(RBT)主动外倾变位，分析挡土墙不同主动外倾变位量对新旧路基顶面差异沉降的影响，并与土工离心模型试验结果进行验证比较.结果表明：下设的刚性挡土墙与新老路基相互作用，共同依存.数值模拟反映当主动外倾量与墙高之比为1%~3%时，由挡土墙主动外倾变位产生的附加差异沉降占总差异沉降的51%~67%，此值明显低于土工离心模型试验结果.</br>The retaining structures including the balance weight retaining wall were set up outside the new embankment unilaterally in mountain region highway embankment widening reconstruction. The finite element software phase2 was used to build a detailed numerical model for describing the interaction between soil and wall, which introduced the joint element. Based on two-step approach, the nonzero displacement constraints were imposed on metope to simulate translational and rotational (RBT) active extraversion deflection of the retaining wall. The effect of the different deformation amount of active extraversion deflection in the retaining wall on the embankment differential settlement was analyzed. The results were verified and compared with the test results of geotechnical centrifuge model. It shows that the rigid retaining wall is interacted and interdependent well with the new and old embankment. Additional differential settlement, which is caused by the active extraversion deflection of retaining wall, is 51% to 67 % of total differential settlement when the ratio of the extraversion value to wall height is 1% to 3 %.
%K 山区公路 路基拓宽改建 挡土墙主动外倾变位 附加差异沉降 有限单元法&lt
%K /br&gt
%K mountain region highway embankment widening reconstruction retaining wall active extraversion deflection additional differential settlement FEM
%U http://hdxbzkb.cnjournals.net/ch/reader/view_abstract.aspx?file_no=20160918&flag=1