铁道标准设计2025，Vol.69Issue(10)：95-102,8.DOI:10.13238/j.issn.1004-2954.202505260006
深大圆形竖井支护结构研究与应用
Research and Application of Support Structures for Deep and Large Circular Shafts
摘要
Abstract
With the progressive development and utilization of urban underground space,addressing the technical problems of constructing deep and large shafts safely and rapidly in existing urban built-up areas has become essential.This study investigates a circular shaft support structure system,aiming to achieve green and low-carbon engineering constructions.Taking the intercity railway project in the Guangdong-Hong Kong-Macao Greater Bay Area as the research object,the mechanical properties and influencing factors of diaphragm wall support structures for ultra-deep circular shafts were analyzed using theoretical calculations,numerical simulations,and comparative analyses.Theoretical results were further validated against on-site monitoring data,statistical analysis,and field surveys.The research concluded that:(1)The stress characteristics of circular shaft support structures were mainly circumferential compression,with a clear spatial arching effect.This allowed full utilization of the compressive properties of concrete,enabling better control of load on support structures and saving both engineering materials and costs.(2)Excavation advance length and diaphragm wall verticality were the main factors affecting the mechanical properties of the support structures.Excavation advance length affected structural stability during the excavation process,while diaphragm wall verticality determined the overall stiffness and safety of the support structures.Compared to traditional rectangular foundation pits,circular shaft support structures improve shaft construction efficiency and enhance the overall stability and safety of the foundation pit.Moreover,the structures provide better control of foundation pit deformation and reduce impacts on the surrounding environment.关键词
铁路隧道/圆形竖井/支护结构/力学特性/拱效应/开挖进尺Key words
railway tunnel/circular shaft/support structure/mechanical behavior/arching effect/excavation advance length分类
交通工程引用本文复制引用
唐伟,李孟,李爱东,唐鹏,柴文勇..深大圆形竖井支护结构研究与应用[J].铁道标准设计,2025,69(10):95-102,8.基金项目
中国铁路设计集团有限公司科技开发课题(2021A250301) （2021A250301）
