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隧道建设(中英文) ›› 2023, Vol. 43 ›› Issue (S2): 169-177.DOI: 10.3973/j.issn.2096-4498.2023.S2.019

• 研究与探索 • 上一篇    下一篇

排水深隧盾构下穿既有隧道沉降变形与施工控制研究

张小妹1, 鲁飞1, 陈建航2, 牛宏荣1, 苏栋2 3 4, *   

  1. 1. 深圳市前海建设投资控股集团有限公司, 广东 深圳 518066;2. 深圳大学土木与交通工程学院, 广东 深圳 518060;3. 滨海城市韧性基础设施教育部重点实验室(深圳大学), 广东 深圳 518060; 4. 深圳市地下车站绿色高效智能建造重点实验室, 广东 深圳 518060)

  • 出版日期:2023-12-30 发布日期:2024-03-27
  • 作者简介:张小妹(1978—),女,广东湛江人,2003年毕业于清华大学,水资源专业,硕士,高级工程师,主要从事排水深隧工程方面的研究工作。Email: 40096337@qq.com。*通信作者: 苏栋, Email: sudong@szu.edu.cn。

Settlement Deformation and Construction Control of Existing Tunnel Induced By Underneath Crossing of Deep Drainage Shield Tunnel

ZHANG Xiaomei1, LU Fei1, CHEN Jianhang2, NIU Hongrong1, SU Dong2, 3, 4, *   

  1. (1. Qianhai Investment Holding, Shenzhen 518066, Guangdong, China; 2. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China; 3. Key Laboratory of Coastal Urban Resilient Infrastructures(MOE), Shenzhen University, Shenzhen 518060, Guangdong, China; 4. Shenzhen Key Laboratory of Green, Efficient and Intelligent Construction of Underground Metro Station, Shenzhen 518060, Guangdong, China)

  • Online:2023-12-30 Published:2024-03-27

摘要: 为研究既有隧道结构在新建隧道盾构下穿过程中沉降变化规律及与施工控制方法之间的关系,依托深圳前海—南山排水隧道盾构下穿既有11号线工程开展既有结构变形监测,结合现场监测数据及工程实际情况,进行对重要施工因素的相关性分析,分析得到既有结构在下穿过程中沉降变化规律及与下穿施工控制方法间的关系。研究表明: 1)排水深隧穿越过程中既有11号线隧道竖向变形规律与相应施工阶段、施工措施间存在明显对应关系; 2)既有11号线隧道结构的沉降特点表现为在横向上不同部位沉降存在差异,但道床处未发生明显不均匀沉降,纵向上由于施工原因沉降曲线可表现为“V”形或“W”形; 3)通过选取合理的土舱压力、注浆压力以及采取二次注浆、多次补注浆增强注浆效果的施工措施对控制结构沉降具有重要作用。

关键词: 盾构隧道, 下穿, 既有结构, 沉降, 监测数据, 施工控制

Abstract: To explore the settlement patterns of the existing tunnel structure inducted by underneath crossing of deep drainage shield tunnel and its relationship with construction control methods, a case study is conducted on the Shenzhen Qianhai-Nanshan drainage tunnel crossing underneath the existing Line 11. The essential construction factors affecting the settlement of the existing tunnel are analyzed based on field monitoring data and site conditions. The results reveal the following: (1) The settlement and deformation of the existing Line 11 tunnel is prominently correlated to construction stages and methods. (2) The unenven settlement occurs on the horizontal direction of the existing tunnel, whereas it cannot be found on roadbed. The settlement curve on the longitudinal direction presents a V shape or W shape. (3) Selecting rational soil chamber and grouting pressures and using secondary grouting and frequent supplementary grouting is conductive to settlement control of the existing structure.

Key words: shield tunnel, underneath crossing, existing tunnel, settlement, monitoring data, construction control