【摘要】：在經(jīng)濟飛速發(fā)展的當下時節(jié),幾乎各個角落都出現(xiàn)了人類為了自我的生存利益而改造自然界的現(xiàn)象。在這個持續(xù)了幾千年的改造過程中,大量邊坡隨著時代出現(xiàn)在人類的生活中,并愈演愈烈,隨之邊坡的穩(wěn)定與否便成為了一個不可逃避的問題,它的安全也時刻決定著人類的安全與否,而滑坡災(zāi)害也成為了最為頻繁的地質(zhì)災(zāi)害之一,其中紅層的滑坡問題也尤為值得關(guān)注。紅層區(qū)在云南分布廣泛,而玉溪--普洱紅層區(qū)分布比例較大,其巖性以泥巖為最主要的,故本文以玉溪--普洱紅層區(qū)泥巖滑坡作為研究對象。在系統(tǒng)的野外勘察與詳細的資料統(tǒng)計與研讀的基礎(chǔ)上,根據(jù)不同的分類方式對研究區(qū)內(nèi)的泥巖滑坡作出統(tǒng)計,之后對典型的滑坡作出定性分析與定量評價,其中用到ansys、 FLAC-3D與理正軟件,并取得了可靠結(jié)論,為滑坡的防治提供理論依據(jù)。研究結(jié)果表明研究區(qū)內(nèi)開挖至全風化層發(fā)生滑坡的幾率較開挖至強風化層發(fā)生滑坡要低,而所有滑坡中滑面位于強-中風化分界線的滑坡最多,滑面位于全-強風化分界線的滑坡較少,二者比例分別為82.58%和15.91%。通過分析可知由于全風化泥巖巖層性質(zhì)接近土質(zhì),松散的結(jié)構(gòu)與較大的縫隙導(dǎo)致了大量的降水水體下滲至強風化巖層,而強風化泥巖與中風化你巖層的性質(zhì)差異較大,中風化泥巖巖層的縫隙很小,水體不能自由下滲,故其主要賦存于強風化泥巖巖層下部,導(dǎo)致滑面最容易發(fā)生于強-中風化分界線,同時致使因開挖至強風化巖層而引發(fā)滑坡的幾率更高。通過評價結(jié)果可知在天然狀態(tài)下,區(qū)內(nèi)滑坡多為穩(wěn)定或欠穩(wěn)定狀態(tài),而在暴雨或地震的因素之下,穩(wěn)定性大大降低,故應(yīng)對滑坡加強防護,并根據(jù)各自特點采取不同的支擋加固、護坡排水等措施。
[Abstract]:In the current period of rapid economic development, almost every corner of the phenomenon of human beings to transform the natural world for their own survival. In the course of this transformation, which lasted for thousands of years, a large number of slopes appeared in human life with the times, and became more and more serious, and the stability of the slopes became an unavoidable problem. Its safety also determines the safety of human beings at all times, and landslide disaster has become one of the most frequent geological disasters, among which the problem of red bed landslide is especially worthy of attention. The red bed area is widely distributed in Yunnan, while the Yuxi-Pu 'er red bed area has a large proportion of distribution, and its lithology is dominated by mudstone. Therefore, this paper takes the mudstone landslide in Yuxi-Pu 'er red bed area as the research object. On the basis of systematic field survey and detailed data statistics and study, according to different classification methods, the mudstone landslide in the study area is counted, and then the qualitative analysis and quantitative evaluation of typical landslide are made. ANSYS, FLAC-3D and Lizheng software are used, and reliable conclusions are obtained, which provide theoretical basis for landslide prevention. The results show that the probability of landslides occurring in the study area from excavation to total weathering is lower than that from excavation to strong weathering, and the landslide with sliding surface located on the boundary line between strong and middle weathering is the most common in all landslides. There are few landslides located on the boundary of total weathering and strong weathering, the ratio of them is 82.58% and 15.91% respectively. Through analysis, it can be seen that because the property of fully weathered mudstone is close to that of soil, the loose structure and large gap cause a large amount of precipitation water body to infiltrate into strongly weathered rock stratum, but the property of strongly weathered mudstone is different from that of middle weathered rock. Because the gap of middle weathered mudstone is very small and the water can't infiltrate freely, it mainly occurs in the lower part of strongly weathered mudstone, which leads to the slip surface occurring most easily on the boundary line between strong and middle weathering. It also increases the risk of landslides caused by excavation of highly weathered rock formations. The evaluation results show that in the natural state, the landslide in the region is mostly stable or unstable, but under the factors of heavy rain or earthquake, the stability is greatly reduced, so it is necessary to strengthen the protection against the landslide. According to their characteristics, different measures are taken, such as retaining reinforcement, slope protection and drainage.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P642.22

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