摘要
为提高既有桥梁桩基础承载能力,采用桩底注浆技术进行加固。加固后采用静载试验对桩基础承载能力进行检测,得出加固后桥梁桩基础沉降量较小,卸载后相对沉降变形很小,说明桩基处于弹性变形状态。结合软件计算结果,得出桩底注浆加固后桩端反力明显提升,桩顶沉降得到了有效控制,达到了预期的加固效果。
In order to improve the bearing capacity of the existing bridge pile foundation,the pile bottom grouting technology is used for reinforcement.After reinforcement,the static load test was used to test the bearing capacity of the pile foundation,and it was concluded that the settlement of the bridge pile foundation after reinforcement was small,and the relative settlement deformation after unloading was small,indicating that the pile foundation was in an elastic deformation state.Combined with the calculation results of the software,it is concluded that the reaction force at the end of the pile is significantly increased after the grouting reinforcement at the bottom of the pile,and the settlement of the pile top is effectively controlled,the expected reinforcement effect is achieved.
作者
刘华峰
LIU Huafeng(Shanxi Chenrun Transportation Technology Co.,Ltd.,Shanxi Jinzhong 030600 China)
关键词
既有桥梁
桩基础
注浆加固
静载试验
existing bridge
pile foundation
grouting reinforcement
static load test
