华唐立交下穿道设计方案有限元分析

华唐立交工程是重庆市江北区城市道路的重要工程.该工程用下穿地通道穿越建新南路.下穿地通道为明挖法施工,部分区段位于已建成轨道三号线华新街一观音桥区间隧道上方.地通道路面与隧道洞顶最近距离仅1.5m.为了确保下穿道施工不影响轨道三号线区问隧道的安全,本文用三雏弹塑性有限元方法,对华唐立交下穿道的施工进行有限元仿真模拟,预...

Finite Element Analysis of the Designing of the Underpass Road of the Huatang Overpass

With the underpass road crossing Jianxin South Road,Huatang Overpass Project is an important project in the urban road construction in Jiangbei District,Chongqing.The underpass road of this project will be constructed with the open-cut method,part of which is over the tunnel of No.3 Railway Line from Huaxin Street to Guanyin Qiao that has already been completed,and the closet distance between the road and the tunnel roof is only 1.5m.In order to make sure that the construction of the underpass road will not threat the safety of the tunnel of No.3 railway Line,this paper makes FEM simulation of the construction of the underpass road of Huatang Overpass and predicts the deformation and the changes of internal forces of the tunnel during the construction by using the Three-dimensional elastoplastic finite element method.Based on the results of calculation,the major influence on the No.3 Railway Line tunnel is vertical variability which will produce additional internal forces,which the present design of the tunnel structure can resist and obsorb.After the construction of Huatang Overpass,the internal forces will meet the demands of capacity and crack.This conclusion provides evidence for the smooth construction of the project.