含软弱结构面顺层岩质边坡破坏机理模型试验研究
发布时间：2018-10-31 15:47
【摘要】：近些年随着我国经济的持续增长,许多基础设施建设工程从平原区转入山岭区,特别是高铁与高速公路的建设,加快了各省市之间的交流和经济的增长。在山岭区大兴土木,进行大量的挖方和填方等工程,必然会造成了高陡路基和高陡边坡。我国层状结构的沉积岩占我国陆地面积的大部分,因此对山岭区大开挖必然造成滑坡规模大、破坏力强的顺层岩质边坡。顺层岩质边坡中存在软弱结构面时,高陡边坡的滑动会更易发生,规模也会相对增大。本文使用模型试验方法对含软弱结构面顺层岩质边坡破坏过程、破坏机理及其破坏的影响因素进行研究,该研究为此类边坡的稳定性分析评价和治理提供参考,将具有非常重要意义。具体内容如下:(1)对含软弱结构面顺层岩质边坡稳定性的影响因素和顺层岩质边坡破坏机理分别进行分析研究。(2)基于相似理论,对应力相似原理进行解释,选取合理的相似常数及相似材料,配制出含软弱结构面顺层岩质边坡岩体相似材料。(3)对绢云母层和黄土材料分别进行室内物理力学试验,证实黄土材料和绢云母层有一定的相似性,可以模拟顺层岩质边坡中的软弱层,因此选取黄土做为软弱结构面模拟顺层岩质边坡中的绢云母层。(4)对含单层软弱结构面顺层岩质边坡和含双层软弱结构面顺层岩质边坡进行建模及模型试验研究。再现顺层岩质边坡的破坏过程,分析含软弱结构面顺层岩质边坡的破坏机理。
[Abstract]:In recent years, with the continuous growth of China's economy, many infrastructure construction projects from the plain to mountain areas, especially the high-speed rail and highway construction, accelerated the exchange between provinces and cities and economic growth. A large number of excavations and landfills will inevitably result in high steep subgrade and high steep slope. The sedimentary rock of layered structure in China accounts for most of the land area of our country, so the large excavation of mountain area will inevitably result in the landslide with large scale and strong destructive rock slope. When there is a weak structural surface in the bedding rock slope, the sliding of the high and steep slope will be easier and the scale will increase. In this paper, the failure process, failure mechanism and influencing factors of bedding rock slope with weak structural plane are studied by using model test method. The research provides a reference for the stability analysis and treatment of this kind of slope. Will be of great significance. The main contents are as follows: (1) the factors affecting the stability of bedding rock slope with weak structural plane and the failure mechanism of bedding rock slope are analyzed respectively. (2) based on the similarity theory, the principle of stress similarity is explained. Selecting reasonable similarity constants and similar materials, similar rock mass materials of bedding rock slope with weak structural plane are prepared. (3) the laboratory physical and mechanical tests of sericite and loess are carried out respectively. It is proved that there is some similarity between loess material and sericite layer, which can be used to simulate the weak layer in the bedding rock slope. Therefore, loess is selected to simulate sericite layer in bedding rock slope. (4) Modeling and model test of bedding rock slope with single layer weak structure plane and bedding rock slope with double layer weak structure plane are carried out. The failure process of bedding rock slope is reappeared and the failure mechanism of bedding rock slope with weak structure is analyzed.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.14
，
本文编号：2302747
[Abstract]:In recent years, with the continuous growth of China's economy, many infrastructure construction projects from the plain to mountain areas, especially the high-speed rail and highway construction, accelerated the exchange between provinces and cities and economic growth. A large number of excavations and landfills will inevitably result in high steep subgrade and high steep slope. The sedimentary rock of layered structure in China accounts for most of the land area of our country, so the large excavation of mountain area will inevitably result in the landslide with large scale and strong destructive rock slope. When there is a weak structural surface in the bedding rock slope, the sliding of the high and steep slope will be easier and the scale will increase. In this paper, the failure process, failure mechanism and influencing factors of bedding rock slope with weak structural plane are studied by using model test method. The research provides a reference for the stability analysis and treatment of this kind of slope. Will be of great significance. The main contents are as follows: (1) the factors affecting the stability of bedding rock slope with weak structural plane and the failure mechanism of bedding rock slope are analyzed respectively. (2) based on the similarity theory, the principle of stress similarity is explained. Selecting reasonable similarity constants and similar materials, similar rock mass materials of bedding rock slope with weak structural plane are prepared. (3) the laboratory physical and mechanical tests of sericite and loess are carried out respectively. It is proved that there is some similarity between loess material and sericite layer, which can be used to simulate the weak layer in the bedding rock slope. Therefore, loess is selected to simulate sericite layer in bedding rock slope. (4) Modeling and model test of bedding rock slope with single layer weak structure plane and bedding rock slope with double layer weak structure plane are carried out. The failure process of bedding rock slope is reappeared and the failure mechanism of bedding rock slope with weak structure is analyzed.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.14
，
本文编号：2302747
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