本文關鍵詞：流-固耦合模型試驗用的新型相似材料研制及應用　出處：《巖土力學》2016年09期 　論文類型：期刊論文

  更多相關文章： 地質力學模型試驗 流-固耦合 相似材料 膠結劑 巖石力學

【摘要】：為研究隧道突水、突泥過程中斷層及圍巖各物理場變化規(guī)律,根據地質力學模型試驗相似原理,通過大量多組別配比試驗,研制出適用于流-固耦合模型試驗的新型斷層及圍巖相似材料。其中,斷層相似材料以砂為粗骨料,滑石粉為細骨料,石膏、膨潤土作為膠結劑,液態(tài)石蠟作為調節(jié)劑;圍巖相似材料以砂為粗骨料,重晶石粉、滑石粉為細骨料,白水泥及乳膠作為膠結劑。通過大量室內試驗,對比分析原巖及相似材料變形特征及強度破壞特性,重點對單軸抗壓強度、滲透系數、重度、泊松比、彈性模量等重要變形及水理特性參量進行調控,系統(tǒng)研究不同配比對材料參數的影響規(guī)律。試驗結果表明:該材料力學參數變化范圍廣、性能穩(wěn)定、操作工藝簡單,可用來模擬不同滲透系數的低、中等強度巖體材料。將該相似材料應用于吉蓮高速公路永蓮隧道斷層突水、突泥三維地質力學模型試驗中,力學性能及水理特性均達到試驗要求,能夠有效地模擬突水、突泥的發(fā)展演變過程,真實反映斷層災變過程中各物理場響應規(guī)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.
【作者單位】： 山東大學巖土與工程結構研究中心;
【基金】：國家重點基礎研究發(fā)展規(guī)劃(973)項目(No.2013CB036000) 教育部項目高等學校博士學科點專項科研基金(No.20130131110032) 國家自然科學基金面上基金(No.51479106)~~
【分類號】：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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