摘要
以某工程排洪渠开挖为背景,运用非线性有限差分数值分析结合强度折减法,对排洪渠开挖的全过程进行数值模拟,分析了开挖过程中的排洪渠边坡的抗滑稳定性,及开挖过程对临近高速公路桥梁桩基变形的影响。结果表明:排洪渠开挖到底部时,边坡安全系数为1.3,满足规范对二级边坡的安全系数要求,但临近桥梁桩顶水平位移超过了其控制值,需要对设计方案进行进一步的论证,或在排洪渠开挖施工过程中采取相应的安全措施控制桩顶水平位移。
The analysis in this paper is according to an engineering project. With nonlinear finite difference numerical simulation method and strength reduction, the anti-sliding stability of the slope of flood discharge channel in the excavation process and the influence of excavation process on the deformation of pile foundation of bridge beam adjacent to expressway are analyzed. The results show that the safety factor of the side slope is 1.3 when the flood discharge channel is excavated to the bottom, which meets the safety factor requirements of secondary side slope. But the horizontal displacement of pile top exceeds the horizontal limit value, so it is necessary to further demonstrate the design scheme, or take corresponding safety measures to control the horizontal displacement of the pile top during the excavation and construction of the flood discharge channel.
作者
邹佳成
翟祥军
陈旭东
方天祥
ZOU Jia-cheng;ZHAI Xiang-jun;CHEN Xu-dong;FANG Tian-xiang(Power China Kunming Engineering Corporation Limited,Kunming 650051)
出处
《云南水力发电》
2019年第5期48-53,共6页
Yunnan Water Power
关键词
强度折减
数值模拟
桥梁桩基
弯矩
变形
strength reduction
numerical simulation
pile foundation
moment
deformation
