松香基相似材料抗剪强度指标试验研究

发布时间：2018-03-19 02:16

本文选题：相似材料　切入点：松香　出处：《地下空间与工程学报》2016年06期 　论文类型：期刊论文

【摘要】：采用松香作为胶结剂的相似材料是地质力学模型试验中常用的一种相似材料。为研究松香基相似材料骨料组成、松香用量、石蜡用量等影响因素对其抗剪强度指标的影响,设计了三因素四水平的正交试验。制作了16组不同配比的试样,通过直剪试验测得其黏聚力和内摩擦角,并对试验结果进行了极差分析。结果表明,松香基相似材料的黏聚力受松香用量的影响最大,随着松香用量的增加,黏聚力有大幅增长;内摩擦角受骨料组成影响最大,粗骨料比例越高,内摩擦角越大。通过调节配比,可使黏聚力在68 k Pa~270 k Pa之间波动,内摩擦角在29°~58°之间波动。该研究成果可为地质力学模型试验中相似材料的制备提供参考。
[Abstract]:The similar material with rosin as binder is a kind of similar material commonly used in geomechanical model test. In order to study the influence factors such as aggregate composition, amount of rosin and paraffin on the shear strength index of rosin base similar material, etc. The orthogonal test of three factors and four levels was designed. Sixteen groups of specimens with different proportions were made. The cohesion and internal friction angle were measured by direct shear test, and the results were analyzed. The cohesion of rosin based similar materials is most affected by the amount of rosin. With the increase of rosin content, the cohesion of rosin is increased greatly, the internal friction angle is most affected by aggregate composition, the higher the ratio of coarse aggregate is, the greater the internal friction angle is. The cohesive force fluctuates between 68k Pa~270 KPA and the angle of internal friction fluctuates between 29 掳and 58 掳. The results can provide a reference for the preparation of similar materials in geomechanical model tests.
【作者单位】：解放军理工大学爆炸冲击防灾减灾国家重点实验室;中国人民解放军65527部队;中国地震局工程力学研究所;
【基金】：十二五国家科技支撑计划重点项目(2015BAK17B01) 国家重大科研仪器研制项目(51527810) 国家自然科学青年基金(51304219)
【分类号】：TU45

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