基于相似理论的力学模型试验材料研究
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摘要
目前,中国对于岩质边坡模型试验相似材料的研究已经非常深入,但对于土质边坡,特别是黄土边坡模型试验相似材料的研究却非常浅薄,因此研究出一种适用于黄土边坡模型试验的相似材料具有非常重要的研究价值。通过大量的相似材料配比试验,研制出一种新型的黄土相似材料来模拟诠释兰州报恩寺滑坡的破坏过程,借以兰州报恩寺滑坡为模型,通过常规三轴试验,确定材料的基本力学参数,通过兰州报恩寺滑坡的室内物理模拟底摩擦试验来验证试验相似材料配比ω_(黄土)∶ω_(河沙)∶ω_(石蜡油)∶ω_水=4∶1∶0.7∶0.627的可靠性。并且通过对该材料的试验可得出,该相似材料有使黄土易于保持水分、配置的特点,且价格便宜,方便购买,可模拟按相似比缩小后的大型黄土体,是一种比较理想的模拟黄土的相似材料。
At present, the research on similar materials for rock slope model tests in China has been very deep, but the research on similar materials for soil slopes, especially loess slope models, was very less. Therefore, it is important to study a similar material suitable for loess slope model test. In this paper, a new type of loess similar material has been developed through a large number of similar material matching tests to simulate and interpret the destruction process of the Landslide of Baoen Temple in Lanzhou. The reliability of loess∶river sand∶paraffin oil∶water = 4∶1∶0.7∶0.627 was verified by means of the indoor physical simulation bottom friction test of landslide Baoen Temple in Lanzhou. And through the test of the material, it can be concluded that the similar material has the characteristics of making the loess easy to maintain moisture and configuration.And it is cheap,convenient to purchase, and can simulate a large loess body reduced by a similar ratio. It is an ideal similar material for loess.
At present, the research on similar materials for rock slope model tests in China has been very deep, but the research on similar materials for soil slopes, especially loess slope models, was very less. Therefore, it is important to study a similar material suitable for loess slope model test. In this paper, a new type of loess similar material has been developed through a large number of similar material matching tests to simulate and interpret the destruction process of the Landslide of Baoen Temple in Lanzhou. The reliability of loess∶river sand∶paraffin oil∶water = 4∶1∶0.7∶0.627 was verified by means of the indoor physical simulation bottom friction test of landslide Baoen Temple in Lanzhou. And through the test of the material, it can be concluded that the similar material has the characteristics of making the loess easy to maintain moisture and configuration.And it is cheap,convenient to purchase, and can simulate a large loess body reduced by a similar ratio. It is an ideal similar material for loess.
引文
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[2]王汉鹏,李术才,张强勇,等.新型地质力学模型试验相似材料的研制[J].岩石力学与工程学报,2006,25(9):1843-1847.
[3] 韩伯鲤,陈霞龄,宋一乐,等.岩体相似材料的研究[J].武汉水利电力大学学报,1997,30(2):6-9.
[4] 马芳平,李仲奎,罗光福.NIOS 相似材料及其在地质力学相似模型试验中的应用[J].水力发电学报,2004,23(1):48-51.
[5] 张延杰,王旭,梁庆国,等.湿陷性黄土模型试验相似材料的研制[J].岩石力学与工程学报,2013,32(S2):4019-4024.
[6]袁文忠.相似理论与静力学模型试验[M].西安:西安交通大学出版社,1998.
[7]安伟刚.岩性相似材料模拟研究[D].长沙:中南大学,2011.
[8]尤凤翔,吕福合.丹东师专学报 [J].相似理论在工程实际中的应用,1999,21(1):55-57.
[9]申明平.宁夏清水河防洪工程裁弯动床物理模型试验研究[J].人民珠江,2017,38(5) :47-52.
[10]肖旦期,胡华,董云.边坡变形破坏机制的底摩擦试验模拟[J].交通科学与经济,2004(1):16-18.
[11] 陈春利.延安地区人工开挖黄土边坡的变形破坏机理研究[D].西安:长安大学,2012.