摘要
为掌握弃土场对临近桥梁的影响,以实际工程为依托,通过三维数值模拟,对弃土场附近不同距离条件下的桥墩进行分析,获取弃土场对桥梁下部结构的影响规律。计算结果表明,桥墩的应力和变形随着弃土场斜坡距离的增大而减小,并且位于弃土场外桥墩的应力和变形小于弃土场内的应力和变形。因此在对桥墩的选址上应尽量避开弃土场,若无法避开,要对弃土场进行加固处理,完善弃土场的排水系统或进行植草绿化,减少斜坡土体的流动和挤压对桥梁造成破坏。
In order to grasp the influence of spoil ground on adjacent bridges,based on actual engineering,the piers in different distances near the waste dump are analyzed by three-dimensional numerical simulation to obtain the influence law of spoil ground on the lower structure of bridge.The calculation results show that the stress and deformation of pier decrease with the increase of slope distance of abandonment site,and the stress and deformation of pier located outside the abandonment site is less than that in abandonment site.Therefore,in the selection of pier location,the abandonment site should be avoided as far as possible.If it can’t be avoided,the abandonment site should be strengthened,drainage system of the abandoned site should be improved or grass planting should be afforested,so as to reduce the flow and squeezing of slope soil mass to cause damage to the bridge.
作者
刘浩
周宇
樊多震
LIU Hao;ZHOU Yu;FAN Duo-zhen(SINOHYDRO BUREAU 14 CO.,LTD.,Kunming 650041,China)
出处
《云南水力发电》
2021年第4期15-19,共5页
Yunnan Water Power
关键词
弃土场
桥梁下部结构
三维数值模拟
应力和变形
spoil ground
bridge substructure
three-dimensional numerical simulation
stress and deformation
