摘要
该文通过某重点桥梁建设工程的超长大直径试桩试验,对比分析了钻孔灌注桩在桩端后压浆前后承载力、沉降的试验数据,认为后压浆对于提高钻孔灌注桩承载力,减少沉降具有明显作用。因而将桩端后压浆技术应用到该桥梁的群桩基础建设中。通过分析该桥梁基础的长期观测数据,发现桩端后压浆对于提高群桩基础的整体性,减少沉降,增加安全储备具有明显的作用。
In this paper, the test data of bearing capacity and settlement of cast - in - place pile in the pile end post grouting are compared and analyzed by the super long and large diameter pile test of a certain important bridge construction project. The post grouting has obvious effect on improving the bearing capacity of cast - in - place pile and reducing the settlement. So the post grouting technology of pile end is applied to the construction of the pile group foundation of the bridge. Through analyzing the long-term observation data of the bridge foundation, it is found that the post grouting of the pile can improve the integrity of the pile foundation, reduce the settlement and increase the safety reserve obviously.
作者
林明惠
陈志坚
Lin Minghui Chen Zhijian(School of Earth Science and Engineering, Hohai Universit)
出处
《勘察科学技术》
2016年第5期25-29,共5页
Site Investigation Science and Technology
基金
江苏省政策引导类计划(BY2015002-05)
关键词
钻孔灌注桩
桩端后压浆
桩基承载力
桩基沉降
群桩基础
cast-in-place pile
post grouting of pile end
bearing capacity of pile foundation
pile foundation settlement
group pile foundation
