黑龙江科技大学学报2024，Vol.34Issue(2)：255-262,8.DOI:10.3969/j.issn.2095-7262.2024.02.014
桩网结构路基动静承载性状分析
Bearing characteristics of geogrid reinforced pile supported embankment under static and dynamic load
摘要
Abstract
This paper aims to study the bearing characteristics of geogrid reinforced pile supported embankment under static and dynamic loading.The study consists of conducting the numerical calculation analysis of the bearing characteristics,the load transfer mechanism,soil arch formation and development law of geogrid reinforced pile supported embankment under static and dynamic loading by finite element analysis;and comparing with the test result by analyzing the pile-soil stress,the distribution of soil pres-sure around the pile,pile-soil stress ratio and soil arching effect under both static and dynamic loading.The results show that the axial stress of foundation pile under static load is about 400 kPa,and the maxi-mum of soil pressure appears in the middle of roadbed and decreases outward gradually along the road-bed;the dynamic stress of piles arranged transversely along the embankment first increases and then de-creases in the buried depth direction under dynamic load,and the maximum vertical stress is about 160%larger than that under static load.The soil arching effect in embankment under static load is greatly weak-ened compared with that under static load,and the weakest effect appears at the center of four piles with the pile-soil stress ratio by 29.3% of the static load.关键词
桩网结构路基/承载特性/动荷载/桩土应力比/土拱效应Key words
geogrid reinforced pile supported embankment/bearing capacity/dynamic loads/pile-soil stress ratio/soil arching effect分类
建筑与水利引用本文复制引用
邓友生,李龙,张克钦,李文杰,肇慧玲..桩网结构路基动静承载性状分析[J].黑龙江科技大学学报,2024,34(2):255-262,8.基金项目
国家自然科学基金项目(51878554) （51878554）
陕西省自然科学基础研究计划重点项目(2018JZ5012) （2018JZ5012）
