摘要
对于盾构隧道侧穿桥梁桩基的情况,采取三种加固方案并和不加固开挖进行对比,运用三维数值模拟的方法对比分析在穿越过程中不同加固方案对于限制隧道和桥梁变形的效果,比选得出最理想的方案用于工程,根据结果得出:对于该工程,采用注浆加固隧道周围土体相比于对其他区域土体进行加固更为有效;在侧穿的隧道施工中,隧道开挖带来的土体扰动会使桥梁产生变形,产生负摩擦阻力,而通过在施工前进行加固可以有效的限制开挖对桩体的影响。
In this paper,three reinforcement schemes are adopted for the two cases of the shield tunnel side piercing and the middle of the bridge pile foundation,and the most ideal scheme is obtained by comparison with the unreinforced excavation. According to the results,the results are as follows: for the project,it is the most effective and economical reinforcement scheme to reinforce the tunnel with grouting to reinforce the tunnel,whether side or medium. During the tunnel construction,the soil disturbance caused by the tunnel excavation will cause the deformation of the bridge and produce the negative friction resistance,and the effect of the excavation on the pile can be effectively restricted by the reinforcement before construction.
作者
邓敦毅
侯建林
李鹏
李书成
陈道政
Deng Dunyi;Hou Jianlin;Li Peng;Li Shucheng;Chen Daozheng(China Railway Beijing Engineering Group Co., Ltd., Heifei 230046, China;School of Civil Engineering, Hefei University of Technology, Hefei 230009, China)
出处
《山西建筑》
2019年第6期155-157,共3页
Shanxi Architecture
关键词
盾构隧道
加固
桥梁桩基
shield tunneling
reinforcement
bridge pile foundation
