【摘要】：論文以國家自然科學基金項目為依托,以錨固巖質邊坡大型振動臺試驗為背景,開展模型相似材料配比研究。主要針對水泥砂漿及巖石進行了相似材料的配比試驗研究。試驗選用的相似原材料有重晶石、鐵精粉、石英砂、細砂、石膏、水泥、甘油等。試驗以相似理論為依據,利用正交設計法安排試驗方案,采用澆筑灌漿的方法制備試樣。通過室內試驗獲得相似材料的主要物理力學參數,包括密度、抗壓強度、彈性模量、抗拉強度、內摩擦角、黏聚力等。采用極差分析法和直觀曲線圖對相似材料的正交試驗結果進行處理和分析。從試驗結果中選擇合適的配比,制備錨固體模型,進行拉拔試驗。本次試驗得了可靠的試驗數據,對模型相似材料配比試驗的研究具有一定的參考價值。主要研究工作如下:1、利用正交表設計了9組水泥砂漿相似材料配比方案,以及16組巖石相似材料配比方案,進行試驗研究。2、通過敏感性分析,判斷砂漿及巖石的相似材料正交試驗中,各個物理力學參數的主要影響因素和次要影響因素,并結合直觀曲線圖,分析各種原材料對混合材料物理力學性質影響的規(guī)律。3、通過多元線性回歸分析,得出試驗指標與各因素之間的近似函數關系方程。4、通過錨固體模型拉拔試驗,初步得到錨固體模型兩個界面上受力情況,以及錨桿錨固長度對抗拔力的影響規(guī)律,驗證了應變片測量兩個界面上剪應力的可行性。
[Abstract]:Based on the project of the National Natural Science Foundation and the large shaking table test of Anchorage rock slope, this paper carries out the research on the matching ratio of the model similar materials. The ratio of similar materials to cement mortar and rock was studied. Similar raw materials are barite, iron powder, quartz sand, fine sand, gypsum, cement, glycerin and so on. Based on the similarity theory, the test scheme was arranged by orthogonal design method, and the sample was prepared by pouring grouting method. The main physical and mechanical parameters of the similar materials are obtained through laboratory tests, including density, compressive strength, modulus of elasticity, tensile strength, angle of internal friction, cohesion and so on. The orthogonal test results of similar materials were processed and analyzed by means of range analysis and visual graph. The Anchorage model was made by selecting the appropriate proportion from the test results and the drawing test was carried out. Reliable experimental data are obtained in this experiment, which has certain reference value for the study of model similar material ratio test. The main research work is as follows: 1. By using orthogonal table, 9 groups of cement mortar similar material proportioning schemes and 16 groups of rock similar material proportioning schemes are designed. 2, through sensitivity analysis, In the orthogonal test of similar materials for judging mortar and rock, the main and secondary influencing factors of each physical and mechanical parameter are analyzed, and the law of the influence of various raw materials on the physical and mechanical properties of mixed materials is analyzed in combination with intuitionistic curves. Through multivariate linear regression analysis, the approximate functional equation between the test index and various factors is obtained. 4. Through the pull out test of the anchor body model, the stress on the two interfaces of the anchor body model is preliminarily obtained. The effect of anchoring length on pull-out force is also discussed, and the feasibility of measuring shear stress at two interfaces by strain gauge is verified.
【學位授予單位】：蘭州大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU45

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