岩土工程学报2016，Vol.38Issue(11)：1933-1940,8.DOI:10.11779/CJGE201611001
无砟轨道X形桩-筏复合地基动土压力分布规律试验研究
Model tests on distribution law of dynamical soil pressure of ballastless track XCC pile-raft composite foundation
摘要
Abstract
Based on 1:5 scale track-subgrade-pile-raft composite foundation model, the dynamic response of ballastless track X-section cast-in-situ concrete (XCC) pile-raft composite foundation embedded in sand under sine wave loads (which can approximately simulate a train axle load) with different frequencies is investigated. This involves the measurement and analysis of response in velocity and dynamic soil pressure under different load frequencies. It is shown that, in the direction of cross-section of embankment, the velocity response mainly focuses on track-subgrade. The dynamic soil pressure of roadbed is"W"-shaped distribution and the dynamic soil pressure of subsoil surface is "U"-shaped distribution in the direction of cross-section of embankment. The dynamic load magnification factor of roadbed increases with the increasing load frequency. The research results may provide an insight into the theoretical analysis and calculation of ballastless track XCC pile-raft composite foundation, and validating its dynamic load magnification factor.关键词
无砟轨道/桩-筏复合地基/X形桩/动土压力/模型试验Key words
ballastless track/pile-raft composite foundation/XCC pile/dynamic soil pressure/model test分类
建筑与水利引用本文复制引用
刘汉龙,孙广超,孔纲强,李辉..无砟轨道X形桩-筏复合地基动土压力分布规律试验研究[J].岩土工程学报,2016,38(11):1933-1940,8.基金项目
国家自然科学基金项目（U1134207，51278170，51479060）；国家自然科学基金重点国际（地区）合作研究项目 （）
