含軟弱結(jié)構(gòu)面順層巖質(zhì)邊坡破壞機理模型試驗研究
發(fā)布時間：2018-10-31 15:47
【摘要】：近些年隨著我國經(jīng)濟的持續(xù)增長,許多基礎(chǔ)設(shè)施建設(shè)工程從平原區(qū)轉(zhuǎn)入山嶺區(qū),特別是高鐵與高速公路的建設(shè),加快了各省市之間的交流和經(jīng)濟的增長。在山嶺區(qū)大興土木,進行大量的挖方和填方等工程,必然會造成了高陡路基和高陡邊坡。我國層狀結(jié)構(gòu)的沉積巖占我國陸地面積的大部分,因此對山嶺區(qū)大開挖必然造成滑坡規(guī)模大、破壞力強的順層巖質(zhì)邊坡。順層巖質(zhì)邊坡中存在軟弱結(jié)構(gòu)面時,高陡邊坡的滑動會更易發(fā)生,規(guī)模也會相對增大。本文使用模型試驗方法對含軟弱結(jié)構(gòu)面順層巖質(zhì)邊坡破壞過程、破壞機理及其破壞的影響因素進行研究,該研究為此類邊坡的穩(wěn)定性分析評價和治理提供參考,將具有非常重要意義。具體內(nèi)容如下:(1)對含軟弱結(jié)構(gòu)面順層巖質(zhì)邊坡穩(wěn)定性的影響因素和順層巖質(zhì)邊坡破壞機理分別進行分析研究。(2)基于相似理論,對應力相似原理進行解釋,選取合理的相似常數(shù)及相似材料,配制出含軟弱結(jié)構(gòu)面順層巖質(zhì)邊坡巖體相似材料。(3)對絹云母層和黃土材料分別進行室內(nèi)物理力學試驗,證實黃土材料和絹云母層有一定的相似性,可以模擬順層巖質(zhì)邊坡中的軟弱層,因此選取黃土做為軟弱結(jié)構(gòu)面模擬順層巖質(zhì)邊坡中的絹云母層。(4)對含單層軟弱結(jié)構(gòu)面順層巖質(zhì)邊坡和含雙層軟弱結(jié)構(gòu)面順層巖質(zhì)邊坡進行建模及模型試驗研究。再現(xiàn)順層巖質(zhì)邊坡的破壞過程,分析含軟弱結(jié)構(gòu)面順層巖質(zhì)邊坡的破壞機理。
[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.
【學位授予單位】：中國地質(zhì)大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U416.14
，
本文編號：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.
【學位授予單位】：中國地質(zhì)大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U416.14
，
本文編號：2302747
本文鏈接：http://sikaile.net/kejilunwen/daoluqiaoliang/2302747.html
