摘要
结合作者工作经验,从规范要求和工程实践角度,论证了对城市轨道交通工程中暗挖初支结构进行理论计算的必要性。通过对常用的竖向土压力理论进行分析对比,指出了其优缺点及适用性。对与可靠性相关的暗挖初支结构设计方法进行了比较。分析了压弯构件轴力、弯矩和安全系数的关系,给出了利用M-N曲线进行安全性判别的简便方法。
Combined with the author’s working experience,this paper demonstrates the necessity of theoretical calculation of concealed excavation initial support structure in urban rail transit engineering from the perspective of specification requirements and engineering practice.The advantages,disadvantages,and applicability of commonly used vertical earth pressure theories are pointed out through analysis and comparison.The reliability related design methods of underground excavation and initial support structures are compared.The relationship between axial force,bending moment,and safety factor of compression and bending members is analyzed,and a simple method for safety evaluation using M-N curves is presented.
作者
闫立鹏
Yan Lipeng(China Railway Fifth Survey and Design Institute Group Co.,Ltd.,Beijing 100068,China)
出处
《山西建筑》
2023年第12期166-169,共4页
Shanxi Architecture
基金
西安市轨道交通集团有限公司科技研究开发计划项目(D15-YJ-152021007)
中铁第五勘察设计院集团有限公司科技研究开发计划项目(T5Y2021-B03)。
关键词
城市轨道交通
暗挖
初支结构
urban rail transit
underground excavation
initial support
