铁道科学与工程学报2018，Vol.15Issue(4)：911-918,8.
斜向旋喷桩加固重载铁路路基效果研究
Research on reinforcement effect of Shuo-Huang heavy-haul railway subgrade by inclined jet grouting piles
摘要
Abstract
Based on the subgrade of Shuo-Huang heavy-haul railway reinforced by Inclined Jet Grouting Piles (IJGP), a three-dimensional finite element model of reinforced subgrade was established by using ABAQUS software. The change regularity of additional stress distribution in subgrade and settlements of subgrade surface under uniformly distributed load before and after reinforced subgrade by IJGP were analyzed. The results show that stress concentration occurred in pile soil contact areas after reinforced subgrade by IJGP, and this phenomenon was most obvious in the pile bottom. After reinforcing subgrade by IJGP, the additional stresses at different locations along the transverse direction decreases and the distribution of additional stresses becomes more uniform, therefore IJGP has obvious function of supporting and reinforcement. The settlements at different locations of subgrade surface decreases significantly after reinforcing subgrade by IJGP, hence IJGP has positive effect on reducing settlements of subgrade surface. The research results provide reference for further revealing reinforcement effect of IJGP and capacity enlargement of Shuo-Huang heavy-haul railway.关键词
重载铁路/加固效果/数值计算/斜向旋喷桩/路基/附加应力Key words
Heavy-haul railway/reinforcement effect/numerical calculation/inclined jet grouting piles/subgrade/additional stress分类
交通工程引用本文复制引用
谢小山,陈彦恒,赵春彦,梅慧浩,伍晓伟..斜向旋喷桩加固重载铁路路基效果研究[J].铁道科学与工程学报,2018,15(4):911-918,8.基金项目
国家自然科学基金资助项目(51408613) （51408613）
