断层破碎带隧道突水突泥模型试验系统研制与应用

发布时间：2018-01-16 02:31

本文关键词：断层破碎带隧道突水突泥模型试验系统研制与应用　出处：《岩土工程学报》2017年03期 　论文类型：期刊论文

【摘要】：为研究吉莲高速永莲隧道扰动作用下突水突泥灾变演化过程及破坏特征,以F2断层破碎带为研究对象,研制大型三维地质模型试验系统,该系统由模型架、地应力加载系统、水压加载系统以及信息监测系统组成,通过材料配比试验及物理力学性能参数测试,研制出适用于流固耦合模型试验的新型断层围岩及正常围岩相似材料。采用该系统进行模型试验,揭示正常围岩开挖过程中及揭露断层后的隧道围岩渗流压力、应力应变、位移以及涌出物等特征参数的变化规律,模型试验结果与实际工程灾变特征具有较好一致性。试验结果表明该系统稳定可靠,可广泛应用于其它地下工程的模型试验研究,其研究方法及结果对类似工程研究具有一定的指导和借鉴意义。
[Abstract]:In order to study the catastrophic evolution process and failure characteristics of water inrush and mud inrush under disturbance of Jilian High-speed Yonglian Tunnel, a large-scale three-dimensional geological model test system was developed with F2 fault fracture zone as the research object, and the system was based on a model frame. The in-situ stress loading system, hydraulic loading system and information monitoring system are made up of the material ratio test and physical and mechanical performance parameters test. A new type of similar material of fault surrounding rock and normal surrounding rock is developed, which is suitable for fluid-solid coupling model test, and the model test is carried out with this system. The variation rules of seepage pressure, stress and strain, displacement and gush of tunnel surrounding rock during excavation of normal surrounding rock and after exposing fault are revealed. The experimental results show that the system is stable and reliable and can be widely used in other underground engineering model tests. Its research methods and results have certain guidance and reference significance for similar engineering research.
【作者单位】：山东大学岩土与结构工程研究中心;
【基金】：国家重点研发计划项目(2016YFC0801600) 国家自然科学基金项目(41272385) 教育部博士点基金项目(20130131110032)
【分类号】：U456
【正文快照】： 突水突泥作为一种复杂的动力灾害现象,已成为隧道穿越断层破碎带时的主要地质灾害。断层带岩体裂隙发育,胶结性差,以富水高压、松散破碎为主,含水体内介质强度极低,隧道围岩在受到开挖扰动后,出现应力释放以及地下水渗流路径改变等现象,在满足灾害启动条件后,隧道就会发生突水

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