摘要
Abstract
In order to ensure the construction quality of high-speed railway bridge pile foundation in deep soft soil area,taking Henan to Bei-jing section of Beijing-Shanghai high-speed railway as an example,a settlement deformation monitoring network was established to analyze the settlement time-history response of high-speed railway bridge pile foundation by using automatic monitoring technology.The results show that with the increase of excavation progress,the compression of soil layer at the base of pier pile decreases rapidly at first and then slowly.With the increase of pile bottom depth,the thickness of pile bottom compression becomes larger and larger.The larger the area of the outer edge of the pile,the smaller the thickness of the compressed layer.Among them,the compression distance between the base of the bridge pile founda-tion at DK124 working point and DK240 is 9.5 mm and 12.5 mm respectively,and the compression amount per meter of the corresponding ad-jacent measuring point is 0.09 mm and 0.08 mm respectively,which meets the requirements of the specification.关键词
软土地区/桥梁桩基础/监测技术/沉降量Key words
Soft soil area/Bridge pile foundation/Monitoring technology/Settling capacity分类
交通工程
