深厚软土地区高速铁路桥梁桩基础沉降监测分析  

Monitoring Analysis of Settlement of Pile Foundation of High Speed Railway Bridge in Deep Soft Soil Area

作　　者：聂旸 Nie Yang(China Building Materials(Henan)Survey and Design Co.Ltd.,Xinyang,Henan 464000)

机构地区：[1]中建材(河南)勘测设计有限公司,河南信阳464000

出　　处：《江西建材》2024年第9期197-199,共3页

摘　　要：为了保证深厚软土地区高速铁路桥梁桩基础的施工质量,文中以京沪高铁河南至北京段为例,建立沉降变形监测网,利用自动监测技术分析高速铁路桥梁桩基础的沉降时程响应。结果表明,随着开挖进度的增加,墩桩底土层压缩量先快速降低后缓慢降低;随着桩底深度的增加,桩底压缩量厚度越来越大;桩外缘面积越大,压缩层厚度越小。其中,DK124工点及DK240处桥梁桩基础基层压缩距桩底位置分别为9.5、12.5 mm,对应的相邻测点每延米压缩量分别为0.09、0.08 mm,满足规范要求。In order to ensure the construction quality of high-speed railway bridge pile foundation in deep soft soil area, taking Henan to Beijing 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 foundation at DK124 working point and DK240 is 9.5 mm and 12.5 mm respectively, and the compression amount per meter of the corresponding adjacent 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 

分 类 号：U238[交通运输工程—道路与铁道工程]