1. 同济大学 地下建筑与工程系， 上海 200092； 2. 珠海大横琴股份有限公司， 广东 珠海 519031;3. 上海隧道工程有限公司， 上海 200032
出版日期:2019-06-28发布日期:2019-07-23作者简介:张子新(1966-)，男，河北省承德市人，教授，博士生导师，主要从事隧道工程和地下结构工程设计.E-mail：zxzhang@tongji.edu.cn.基金资助:珠海大横琴股份有限公司和上海隧道工程有限公司联合项目 (SG25-2014-173B1)，国家自然科学基金项目(41372276)Field Test and Numerical Analysis of a New Water-Proof System for a Shield Tunnel
ZHANG Zixin1,XIAO Shihui2,LIU Tongwei1,HUANG Xin1,HE Ren31. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Zhuhai Da Heng Qin Co., Ltd., Zhuhai 519031, Guangdong, China;3. Shanghai Tunnel Engineering Co., Ltd., Shanghai 200032, China
Online:2019-06-28Published:2019-07-23摘要/Abstract
摘要： 以珠海横琴新区马骝洲交通隧道工程为背景，通过设计和现场试验，研究了盾构隧道明挖段反应性丁基橡胶钢板止水带与诱导缝相结合的新型防水体系的实际应用效果；结合工程实例进行数值模拟，运用扩展有限单元法分析新型防水体系对于裂缝扩展的控制效果，并分析新型反应性丁基橡胶钢板止水带的作用效果，以优化实际工程应用.结果表明，与传统的混凝土自防水体系相比，新型防水体系对于裂缝扩展及渗漏水的控制效果显著，从而验证了新型防水体系设计的合理性和可行性，且其工程现场试验结果与数值模拟结果相符.同时，通过分析不同诱导缝布置间距下的裂缝扩展结果发现，诱导缝的最优布置间距为4～5 m.此外，在设计过程中应重点考虑温度和收缩作用等影响因素.
关键词: 盾构隧道； 诱导缝； 裂缝； 工程试验； 扩展有限单元法
Abstract: The practical application effect of the new waterproof system is investigated by the design and field test in Maliuzhou traffic tunnel project in Hengqin New District, Zhuhai. Extend finite element method (XFEM) is used to analyze the effect of the inducing joint waterproofing system on the crack development, and the effect of the new reactive butyl rubber plate water stop in different spacing layouts is calculated by using the numerical simulation and is used to optimize the applications in projects. The test results show that the new waterproof system is effective in controlling the crack development and leakage of water, compared with the traditional method of self-waterproofing concrete, the new system proves the rationality and feasibility of the new waterproof system design. Besides, the numerical simulation results are in good agreement with the field test results. By means of the analysis of the crack development results under different spacing of induced joints, it is determined that the optimal arrangement space is 4—5 m. In addition, the design process should focus on the role of temperature and shrinkage of concrete that may cause cracks.
Key words: shield tunnel; inducing joint; crack; engineering test; extend finite element method (XFEM)
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