岩土与地下工程 2026年 第卷 第02期

DOI: 10.7672 / sgjs2026020111

敏感地层双模盾构切桩下穿既有隧道变形控制

康安帅¹,余俊²’³’⁴,刘翼豪¹,沈侃¹

作者简介：

康安帅，工程师，E-mail: 1490241324@ qq. com

作者单位：

1.中交（广州）建设有限公司，广东广州 511458; 2.中交第二航务工程局有限公司，湖北武汉 430040; 3.交通运输行业交通基础设施智能制造技术研发中心，湖北武汉 430040; 4.长大桥梁建设施工技术交通行业重点实验室，湖北武汉 430040

基金项目：

∗中交第二航务工程局有限公司立项课题（JSKF-20220331-001）

摘要：

针对敏感地层中盾构切桩下穿施工易引起既有隧道变形开裂问题，提出了局部隔墙+桩基加固保护隧道后盾构直接切桩通过的施工方案。采用规范法验证了方案的可行性，并建立三维桩-土-隧道有限元模型分析了不同施工工况下隧道结构的应力和变形响应。根据土压-泥水双模盾构设备特点及地层特性提出了针对性的施工控制要点，最终将隧道最大变形控制在 5.9mm、稳定变形控制在 4.5mm.
桩；隧道；盾构；敏感地层；切削；变形；数值模拟

English：

To address the issue of deformation and cracking in existing road box culverts and tunnelscaused by shield tunneling through piles in sensitive strata, a construction scheme of the shield directlycutting through the piles involving partial partition walls and pile foundation reinforcement for tunnelprotection was proposed. The feasibility of this scheme was verified by the standard method, and a three-dimensional pile-soil-tunnel finite element model was established to analyze the stress and deformationresponses of the tunnel structure under different construction conditions. Based on the characteristics ofthe earth pressure-balance slurry shield machine and the properties of the strata, targeted constructioncontrol points were proposed. Ultimately, the maximum tunnel deformation was controlled at 5.9mm, andthe stable deformation was controlled at 4.5mm.