双线有轨电车浅埋路基板地基临界载荷计算分析
CALCULATION ANALYSIS OF CRITICAL LOAD FOR TWO-LINE SHALLOW TRACK BEDS FOR TRAMS
方文恒 1王浩然 2董竞允 1俞剑 1黄茂松1
作者信息
- 1. 同济大学土木工程学院,上海 200092;同济大学岩土及地下工程教育部重点实验室,上海 200092
- 2. 上海市城市建设设计研究总院(集团)有限公司,上海 200125
- 折叠
摘要
通过推导双线近邻路基板塑性区深度开展至 1/4板宽的临界载荷,调查基础之间距离、埋深、土体重度、内摩擦角和黏聚力对临界载荷的影响.将临界载荷与有限元得到的极限承载力对比,说明国内外路基板地基承载力容许设计值的差异.对某西部城市有轨电车工程的路基板开展设计分析,结果表明,采用单线浅基础临界载荷会高估地基容许设计值,致使设计偏于危险.
Abstract
The influences of the relative distance,burial depth,soil weight,internal friction angle and cohesion on the critical load are investigated by deriving the critical load of the plastic zone depth of the two-line immediately adjacent track beds developed to 1/4 of the plate width.The critical loads are compared with the ultimate bearing capacity obtained from finite elements to illustrate the differences in the allowable design values for the bearing capacity of road substrate foundations at home and abroad.The design analysis is carried out for the track bed of a western city tram project.The results show that the use of single line shallow foundation critical load would overestimate the allowable design value,resulting in a dangerous design.
关键词
双线浅埋路基板/临界载荷/极限承载力/安全系数Key words
two shallow foundations/critical load/ultimate bearing capacity/safety factor引用本文复制引用
基金项目
上海市青年科技启明星计划项目(20QB1404600)
上海市科委自然科学基金面上项目(23ZR1468500)
出版年
2024
NETL
NSTL
万方数据