修正增量法对PBA地铁车站计算模型分析及研究
Analysis and Research on the Calculation Model of PBA Subway Station by Modified Incremental Method
李哲 1刘飞 1靳天睿 1李月阳 2陈滔2
作者信息
- 1. 北京建筑大学 土木与交通工程学院,北京 102612
- 2. 北京市轨道交通设计研究院有限公司,北京 102300
- 折叠
摘要
通过对洞桩法地铁车站建造过程进行梳理,对传统增量法计算模型进行了理论分析.传统增量法计算模型(荷载结构模型)线性叠加时各施工阶段内力的思路不能完全反映实际车站结构体系的非线性特征.因此,借鉴地层结构模型的应力历史概念,提出了修正增量法计算模型,通过内力继承和重新迭代平衡来反映车站结构体系的内力调整及重分布.通过工程案例的定量计算和对比分析研究,结果表明修正增量法计算模型能够解决传统增量法计算模型的问题.建议在洞桩法地铁车站工程中同时使用修正增量法模型和传统增量法模型进行结构设计计算,并综合对比结果确定最终的合理设计指标.
Abstract
The construction process of PBA(Pile-hole method)subway station is sorted out,and the traditional incremental calculation model is analyzed theoretically.The idea of calculating the internal force of each construction stage cannot fully reflect the nonlinear characteristics of the actual station structure system when the traditional incremental method(load structure model)is linearly superimposed.Therefore,Drawing on the concept of stress history of the stratum structure model,a modified incremental method calculation model is proposed to reflect the internal force adjustment and redistribution of the station structure system through internal force inheritance and re-iterative balance.Through the quantitative calculation and comparative analysis of engineering cases,the research results show that the modified incremental method calculation model can solve the problem of traditional incremental method calculation model.It is suggested that the modified incremental method model and the traditional incremental method model should be used simultaneously for structural design calculation in the subway station project of the hole pile method,and the final reasonable design index should be determined by comprehensively comparing the results.
关键词
洞桩法/地铁车站/荷载结构模型/增量法/修正增量法Key words
pile-hole method/subway station/load structure model/incremental method/modified incremental method引用本文复制引用
基金项目
北京市教委科技项目(KM201810016005)
出版年
2024
国家科技期刊平台
NSTL
万方数据