摘要
城市轨道交通由于其自身的结构特点及重要性,对其保护区范围内的外部作业均有严格的变形控制要求。尤其是在保护区内的深基坑开挖作业,由于其对轨道交通结构的影响较大,需采取专门的保护措施。本文通过紧邻金华金义线城际轻轨的深基坑支护设计实践,在以岩石地基为主的深基坑支护中采用单排桩结合微型锚杆的支护形式,通过理论计算及施工实践,最终总变形量满足了轨道交通结构安全保护规程的变形控制要求,取得了较好的技术、经济效果,可为后续类似工程的设计和施工提供借鉴。
Due to its structural characteristics and significance,urban rail transit imposes strict deformation control requirements on external operations within its protected areas.Significant protection measures must be implemented,particularly during the deep excavation of foundation pits within the protected area due to their substantial impact on the rail transit structure.This paper explores the design approach for supporting deep foundation pits in the intercity light rail project near the Jinhua-Yiwu Line.The support system utilizes a combination of single-row piles and micro anchor rods,with an emphasis on rock foundation as the primary structural element.Theoretical calculations and construction practice were conducted to ensure that the final total displacement meets the deformation control requirements outlined in the safety protection regulations for rail transit structures.These findings provide valuable references for future design and construction of similar projects,showcasing positive technical and economic outcomes.
作者
姚炳祥
YAO Bing-xiang(Hangzhou Geotechnical Engineering and Surveying Research Institute with Limited Liability,Hangzhou 310012,Zhejiang,China)
出处
《地基处理》
2023年第S01期1-5,81,共6页
Journal of Ground Improvement
关键词
轨道交通结构
结构安全保护
变形控制
深基坑
单排桩
微型锚杆
rail transit structure
structural safety protection
deformation control
deep foundation pit
single-row pile
micro anchor rod
