泥水盾构开挖面稳定性研究  

Research on Excavation Face Stability of Slurry Shield Tunneling

作　　者：袁大军[1,2,3] 沈翔[1,2,3] 刘学彦 吴俊[1,2,3] 

机构地区：[1]北京交通大学城市地下工程教育部重点实验室,北京100044 [2]北京交通大学隧道与地下工程教育部工程研究中心,北京100044 [3]北京交通大学土木建筑工程学院,北京100044 [4]北京林业大学水土保持学院,北京100083

出　　处：《中国公路学报》2017年第8期24-37,共14页China Journal of Highway and Transport

基　　金：国家重点基础研究发展计划("九七三"计划)项目(2015CB057802);国家自然科学基金项目(51378054);中央高校基本科研业务费专项资金项目(2015JBZ008)

摘　　要：针对不断推进越江海大断面隧道建设的现状,分析了盾构开挖面稳定性对盾构安全掘进的重要性,同时对泥水盾构开挖面稳定的研究方法、研究理论以及拟解决的主要问题等方面进行分析。通过综述国内外泥水盾构隧道开挖面稳定性的研究发展历程及近期新的发展趋势,讨论了已有的泥水盾构开挖面失稳经典理论及模型试验的局限性,介绍了泥水劈裂失稳的判定标准和模型试验等相关研究,同时分析了泥膜及刀盘对开挖面稳定的作用,最后展望了水下隧道,特别是高水压越江海大直径泥水盾构开挖面稳定性问题未来的研究及发展方向。研究主要从经典理论、泥水劈裂和泥膜等方面讨论盾构开挖面稳定等问题,也涉及合理覆土厚度等工程问题。研究结果表明:由于泥水盾构本身的复杂性以及地层的多样性,使盾构与土相互作用下的开挖面稳定问题的研究更为困难;尚没有更具普遍意义的泥水动态成膜评价标准以及刀盘对开挖面的支护作用的研究成果,特别是高水压、复杂地层等条件下的开挖面稳定问题属交叉领域颇多,更需深入研究,方可为工程所用。Aiming at the current situation of continuously promoting the construction of crossriver（sea）tunnel,the importance of the excavation face stability to shield tunneling was analyzed.Whilst the analysis on excavation face stability of shield tunnel was carried out from methods,relevant theories and problems for solution.Through the review of the development of excavation face stability of slurry shield tunneling at home and abroad,the limitation of classical theory and model test of the excavation face instability was discussed.The relevant researches on the criterion and model test of slurry fracturing instability was introduced.Whilst the effect of filter cake and cutter disc on the stability of the excavation face was analyzed.Finally,theoutlook of the development direction of the excavation face stability was provided,especially for the slurry shield tunneling with high water pressure and large diameters.The research mainly discussed the excavation face stability of slurry shield from the classical theory,slurry fracturing,filter cake,involving other problems,such as rational depth of earth cover.The results show that it is difficult to investigate the excavation face stability under the interaction between shield and soil,on account of the complexity of the slurry shield and the diversity of the strata.There have been no universal evaluation criteria of dynamic film formation of slurry and few researches on supporting effect of cutter disc on excavation face.Especially under the high water pressure and complex strata,the problem of excavation face stability referring to crossing fields needs indepth investigation.Only in this way can it apply to the associated works.

关 键 词：盾构隧道 开挖面稳定 综述 泥水劈裂 泥膜 高水压 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]