盾构下穿既有桥桩施工控制技术  

CONSTRUCTION CONTROL TECHNOLOGY OF SHIELD TUNNEL ACROSS THE EXISTING BRIDGE PILE

作　　者：蔡之科 CAI Zhike(Xuzhou Construction Group Co.,Ltd.,Xuzhou 221000,Jiangsu,China)

机构地区：[1]徐州建设集团有限公司,江苏徐州221000

出　　处：《资源信息与工程》2025年第2期85-90,共6页Resource Information and Engineering

摘　　要：随着城市交通系统的不断延扩发展,盾构隧道下穿既有桥梁的情况越发频繁,复杂的工况对施工控制技术提出了更高的要求。以土压平衡盾构下穿既有桥桩桩基为研究对象,通过理论分析与现场监测相结合,提出了桩基托换与精细化施工控制相结合的综合解决方案。研究表明,桩基托换技术能确保桥梁结构安全,并减少地面交通影响;通过优化盾构施工参数,盾构切桩过程中的扰动效应得到有效控制,桥梁沉降量控制在10 mm以内,满足规范要求;现场监测数据与理论计算结果基本吻合,验证了所提出方法的可行性与可靠性。研究成果为类似盾构下穿既有桥梁桩基工程提供了重要的理论依据和实践参考。With the continuous expansion and development of the urban transportation systems,the situation of shield tunnels across the existing bridges has become increasingly frequent,and the complex working conditions have raised higher requirements for construction control technology.Taking the soil-pressure balance shield tunnel across existing bridge pile foundations as the research object,a comprehensive solution combining pile foundation underpinning and refined construction control is proposed through the combination of theoretical analysis and on-site monitoring.The research results indicate that the pile foundation underpinning technology can ensure the safety of the upper bridge structure and reduce the impact on ground traffic.By optimizing the shield construction parameters,the disturbance effects during the shield pile cutting process are effectively controlled,with the bridge settlement kept within 10 mm,which meets the specification requirements.The on-site monitoring data largely matched the theoretical calculation results,verifying the feasibility and reliability of the proposed method.The research results provide a important theoretical basis and practical reference for similar shield tunnel across existing bridge pile foundation projects.

关 键 词：土压平衡盾构 桩基托换 桥梁沉降 施工控制 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]