流-固耦合模型试验用的新型相似材料研制及应用

发布时间：2018-01-03 21:37

本文关键词：流-固耦合模型试验用的新型相似材料研制及应用　出处：《岩土力学》2016年09期 　论文类型：期刊论文

【摘要】：为研究隧道突水、突泥过程中断层及围岩各物理场变化规律,根据地质力学模型试验相似原理,通过大量多组别配比试验,研制出适用于流-固耦合模型试验的新型断层及围岩相似材料。其中,断层相似材料以砂为粗骨料,滑石粉为细骨料,石膏、膨润土作为胶结剂,液态石蜡作为调节剂;围岩相似材料以砂为粗骨料,重晶石粉、滑石粉为细骨料,白水泥及乳胶作为胶结剂。通过大量室内试验,对比分析原岩及相似材料变形特征及强度破坏特性,重点对单轴抗压强度、渗透系数、重度、泊松比、弹性模量等重要变形及水理特性参量进行调控,系统研究不同配比对材料参数的影响规律。试验结果表明:该材料力学参数变化范围广、性能稳定、操作工艺简单,可用来模拟不同渗透系数的低、中等强度岩体材料。将该相似材料应用于吉莲高速公路永莲隧道断层突水、突泥三维地质力学模型试验中,力学性能及水理特性均达到试验要求,能够有效地模拟突水、突泥的发展演变过程,真实反映断层灾变过程中各物理场响应规律。
[Abstract]:In order to study the variation law of each physical field of fault and surrounding rock in the process of tunnel water inrush and mud outburst, according to the similarity principle of geomechanical model test, a large number of multi-group proportioning tests were carried out. A new fault and surrounding rock similar material suitable for fluid-solid coupling model test was developed, in which sand was used as coarse aggregate, talc powder as fine aggregate, gypsum and bentonite as cementing agent. Liquid paraffin as regulator; The similar materials of surrounding rock are sand as coarse aggregate, barite powder and talc powder as fine aggregate, and white cement and latex as cementing agent. Through a large number of laboratory tests, the deformation characteristics and strength failure characteristics of original rock and similar materials are compared and analyzed. The uniaxial compressive strength, permeability coefficient, weight, Poisson's ratio, modulus of elasticity and other important deformation and hydrological parameters are mainly regulated. The experimental results show that the mechanical parameters of the material vary widely, its properties are stable, the operation process is simple, and it can be used to simulate the low permeability coefficient. Medium strength rock mass material. The similar material has been applied to the 3D geomechanical model test of Yonglian tunnel fault of Jilian Expressway. The mechanical properties and hydrological properties have reached the requirements of the test. It can simulate the development and evolution of water inrush and gouge effectively and reflect the response law of each physical field in the process of fault disaster.
【作者单位】：山东大学岩土与工程结构研究中心;
【基金】：国家重点基础研究发展规划(973)项目(No.2013CB036000) 教育部项目高等学校博士学科点专项科研基金(No.20130131110032) 国家自然科学基金面上基金(No.51479106)~~
【分类号】：U451.5;U457.2
【正文快照】： This work was supported by the National Program on Key Basic Research Project of China(973 Program)(2013CB036000);Specialized Research Fund for theDoctoral Program of Higher Education(20130131110032)and the General Program of the National Natural Science

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