本文關(guān)鍵詞：邊坡形態(tài)與巖層產(chǎn)狀對反傾向邊坡穩(wěn)定性影響的數(shù)值分析　出處：《長安大學》2015年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 反傾向巖質(zhì)邊坡 強度折減 數(shù)值分析 安全系數(shù) 邊坡穩(wěn)定性分析

【摘要】：反傾向巖質(zhì)邊坡是指邊坡的走向與巖層的走向近于平行、傾向相反的邊坡。反傾向巖質(zhì)邊坡的結(jié)構(gòu)形態(tài)決定其相對穩(wěn)定,與順傾向邊坡相比,有關(guān)其穩(wěn)定性的研究相對較少。隨著山區(qū)公路工程建設(shè)項目的增多,反傾向巖質(zhì)邊坡的變形失穩(wěn)導致的工程病害甚至災難性事件亦屢見不鮮。因此,本文針對邊坡形態(tài)及巖層產(chǎn)狀對邊坡穩(wěn)定問題開展研究是有實際工程意義的。論文首先論述了影響反傾向巖質(zhì)邊坡穩(wěn)定性的自然要素,著重論證了邊坡形態(tài)與巖層產(chǎn)狀對其穩(wěn)定性的影響。其次,依據(jù)單因子變量原理,制定出巖層傾角、邊坡坡度、坡高對反傾向巖質(zhì)邊坡穩(wěn)定性影響的分析方案。采用有限元數(shù)值分析法,以基于強度折減理論的Phase2有限元分析軟件為計算平臺,對多個數(shù)值模型進行計算;最后,通過對數(shù)值模擬計算成果中的強度儲備安全系數(shù)、最大剪應變、水平位移等圖的分析,總結(jié)出其強度儲備安全系數(shù)隨巖層傾角、邊坡坡度、邊坡高度等要素的變化規(guī)律如下:(1)巖層傾角與強度儲備安全系數(shù)近似為4次函數(shù)曲線關(guān)系,曲線可分為4個階段:強度儲備安全系數(shù)平緩段、下降段、最低段、上升段。(2)強度儲備安全系數(shù)隨邊坡坡度的增大而降低,二者呈線性負向相關(guān)。(3)強度儲備安全系數(shù)隨坡高的增加而降低,坡高50m,坡高變化對強度儲備安全系數(shù)影響顯著,坡高50m,坡高變化對強度儲備安全系數(shù)影響較小。(4)綜合分析巖層傾角、邊坡坡度、坡高的變化對強度儲備安全系數(shù)敏感性的影響:巖層傾角在(0°,25°)(65°,85°),坡高的變化對強度儲備安全系數(shù)影響較大,其次分別為坡度、巖層傾角;巖層傾角(35°,55°),坡度的變化對強度儲備安全系數(shù)影響較大,其次分別為坡高、巖層傾角。
[Abstract]:ANTIDIP slope refers to the slope direction of rock and the nearly parallel, toward the opposite slope. Morphology of ANTIDIP rock slope is determined by its relatively stable, compared with the consequent slope, research on its stability is relatively small. With the increase of mountain highway construction project, the anti deformation tendency of rock slope the loss of stability of Engineering diseases and even lead to catastrophic events also It is often seen.. Therefore, according to the shape of the slope and rock occurrence on the slope stability research is of practical engineering significance. The paper first discusses the influence of anti-dumping to the natural elements of rock slope stability, focuses on the effect of slope shape and terrane of its stability. Secondly, on the basis of the single factor variable principle, formulate the dip angle, slope gradient, slope height on inclined rock slope stability analysis of the influence of the finite program. Numerical analysis method, with strength reduction finite element analysis software Phase2 theory for computing platform based on a numerical model is calculated; finally, based on the numerical simulation of strength safety coefficient results in the maximum shear strain analysis, horizontal displacement diagram, summed up the strength reserve safety coefficient of rock angle, slope gradient, slope height variation and other factors are as follows: (1) the dip angle and strength reserve safety coefficient is approximately 4 times function curve, the curve can be divided into 4 stages: the safety coefficient of strength reserve gently, descending, the lowest segment, ascending segment. (2) and the strength reserve safety coefficient decreased with the increasing of slope, a linear negative correlation between the two. (3) with high strength reserve safety coefficient of slope decreases with the increase of the height of the slope, 50m, influence of slope height change on the strength reserve safety coefficient significantly, high slope 50m, slope height change on strong The degree of reserve smaller safety factor. (4) a comprehensive analysis of the dip angle, slope gradient, slope height influence on the strength reserve safety coefficient sensitivity: in the dip angle (0 degrees, 25 degrees (65 degrees), 85 degrees), change of slope height has great influence on the strength reserve safety coefficient, respectively slope obliquity; dip angle (35 degrees, 55 degrees), the change in slope has great influence on the strength reserve safety coefficient, followed by slope high dip angle.

【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U416.14

【參考文獻】

相關(guān)期刊論文 前1條

1 汪小剛，賈志欣，，陳祖煜，張建紅;巖質(zhì)邊坡傾倒破壞的穩(wěn)定分析方法[J];水利學報;1996年03期

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