岩土工程学报2026，Vol.48Issue(1)：65-77,13.DOI:10.11779/CJGE20240660
高速列车荷载作用下桩网复合地基土工格栅变形特性研究
Deformation characteristics of geogrid in piled embankments under high-speed train load
摘要
Abstract
Geogrid is one of the main factors affecting the load distribution of pile and soil in piled embankments,but the related research is not in-depth enough,especially under dynamic train load.For this reason,a piled embankment model with a similar ratio of 1:5 is established,the dynamic deformation characteristics of the geogrids are studied by using M-shaped wave of the actuator outputting to simulate the dynamic load of the train,and the interaction mechanism among the dynamic load of the train,geogrids,gravel,and piles is revealed.The results show that the geogrid dynamic strain time history curves under the middle and the shoulder of the embankment present a"positive M"shape,and the geogrid dynamic strain time history curves at the slope show an"inverted M"shape.The geogrid-gravel cushion behaves as a"semi rigid platform"in the initial stage of vibration,and acts as a"tensioned membrane"after a period of vibration.When the train runs at high speed,the cumulative strain under the middle and the shoulder of the embankment increases monotonically with the increase of the loading amplitude.At the foot of the side slope,the cumulative strain of the geogrid gradually decreases with the increase of the loading amplitude.关键词
桩网复合地基/高速列车荷载/土工格栅/动应变/累积应变Key words
piled embankment/high-speed train load/geogrid/dynamic strain/cumulative strain分类
建筑与水利引用本文复制引用
NIU Tingting,HUO Mingying,SUN Xin,ZHANG Zhichao..高速列车荷载作用下桩网复合地基土工格栅变形特性研究[J].岩土工程学报,2026,48(1):65-77,13.基金项目
安徽高校自然科学研究项目(2022AH050844) （2022AH050844）
福建省杰出青年科学基金项目(2023J06039) （2023J06039）
国家自然科学基金项目(41977259) （41977259）
福建省自然资源科技创新资助项目(KY-090000-04-2022-019)This work was supported by Natural Science Research Project of Anhui Educational Committee(Grant No.2022AH050844),Fujian Province Outstanding Young Scientist Fund Project(Grant No.2023J06039),National Natural Science Foundation of China(Grant No.41977259),and Fujian Province Natural Resources Science and Technology Innovation Funding Project(Grant No.KY-090000-04-2022-019). （KY-090000-04-2022-019）
