紧邻高架桥桩深基坑支护结构研究  

RESEARCH ON SUPPORTING STRUCTURES OF DEEP FOUNDATION PIT ADJACENT TO VIADUCT PILES

作　　者：王飞 WANG Fei(Anhui Wanjiang Intercity Liuqing Railway Co..Ld,Hefei 230000 China)

机构地区：[1]安徽省皖江城际六庆铁路股份有限公司,合肥230000

出　　处：《低温建筑技术》2022年第6期83-86,95,共5页Low Temperature Architecture Technology

摘　　要：基坑开挖引起的卸载效应对周边环境的影响越来越受到重视,随着城市基础建设高速发展,基础设施愈发密集,建筑空间拥挤和交通错杂问题日益突出,实际工程中隧道近距离下穿高架桥桩的情况也越来越多。由于地下工程地质和水文条件复杂,若设计与施工方案不合理,极易引发隧道基坑开挖导致桥桩侧移、桥梁上部结构坍塌等风险。文中结合苏州某隧道工程实例为背景,综合考虑了桩土相互作用,深入研究了紧邻高架桥桩深基坑合理的支护结构形式,并借助理正结构计算软件和ABAQUS有限元软件,分别建立计算模型,分析对比了隧道基坑开挖对桥桩的影响,为以后类似工程的设计和施工提供借鉴。The impact of the unloading effect caused by the excavation of the foundation pit on the surrounding environment has been paid more and more attention. With the rapid development of urban infrastructures, crowded building space and complicated traffic have become increasingly prominent. There are more and more tunnels passing through viaduct piles at short distance in practical projects. Due to the complex geological and hydrological conditions of underground engineering, it is easy to cause risks such as lateral displacement of bridge piles and collapse of bridge superstructure due to tunnel foundation pit excavation. Based on a tunnel project in Suzhou, this paper comprehensively considers the pile-soil interaction, and deeply studies the reasonable supporting structure form of the deep foundation pit adjacent to the viaduct. The models are established by using the assistant normal structure calculation software and ABAQUS finite element software, and the influence of tunnel foundation pit excavation on bridge piles is analyzed, providing reference for the design and construction of similar projects in the future.

关 键 词：深基坑 桥桩 位移 结构计算 数值模拟 

分 类 号：TU473.2[建筑科学—结构工程]