摘要
以杭黄铁路某典型工点陡坡路基为研究对象,基于桩板墙及h型抗滑桩计算理论,采用理论分析、数值仿真相结合的方法,分析了h型桩板墙的桩基、横梁与承载板的内力与变形、桩-土与板-土相互作用的规律。结果表明:设置了承载板后,h型桩整体的结构力学性能得到了提升。边界条件相同时,背靠式结构的力学性能优于内置式结构的力学性能。随着桩体横向间距的增大,副桩最大负弯矩、最大剪力及横梁最大轴力与桩间距负相关,主桩、副桩及横梁的其他力学指标均与桩间距正相关。对于实际工程,设置承载板的h型桩板墙的横向桩间距大于不设置承载板的横向桩间距。
The steep subgrade at a typical site of Hangzhou—Huangshan railway was taken as the study object herein.Depending on the calculation theory for sheet-pile wall and h-type anti-slide piles,the internal force and deformation of the pile foundation,transverse beam and bearing plate,as well as the law of pile-soil and sheet-soil interaction,were studied by means of theoretical analysis and numerical simulation.The result shows that,when the bearing plate is set,the whole structural mechanical properties of h-type piles are improved,and in case of the same boundary conditions,the mechanical properties of back-to-back structure are superior to those of built-in structure;as the transverse spacing of piles increases,the maximum negative bending moment,the maximum shearing force of the auxiliary pile and the maximum axial force of the transverse beam negatively relate to the pile spacing,while the other mechanical index of the main and auxiliary piles and the transverse beam positively relate.In the actual engineering,h-type sheet-pile wall with bearing plate has the lateral pile spacing greater than that without bearing plate.
作者
吕俊磊
LYU Junlei(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)
出处
《路基工程》
2020年第3期140-145,共6页
Subgrade Engineering
关键词
杭黄铁路
陡坡路基
h型桩板墙
受力机理
内力计算
Hangzhou-Huangshan railway
steep subgrade
h-type sheet-pile wall
mechanical mechanism
calculation of internal force
