本文選題：邊坡工程 + 抗剪強(qiáng)度參數(shù)��； 參考：《中南大學(xué)》2014年碩士論文

【摘要】：滑坡災(zāi)害給社會(huì)的可持續(xù)發(fā)展和人們的生命財(cái)產(chǎn)帶來嚴(yán)重的威脅�；聻�(zāi)害的頻繁發(fā)生以及加固處治資金的大量投入,使得滑坡災(zāi)害的研究成為熱點(diǎn)和難點(diǎn)問題。而巖土體的抗剪強(qiáng)度參數(shù)c和φ值是邊坡穩(wěn)定性分析評(píng)價(jià)和滑坡處置設(shè)計(jì)的基礎(chǔ),抗剪強(qiáng)度參數(shù)的取值成為影響邊坡穩(wěn)定性分析結(jié)果可靠度的關(guān)鍵。因此,研究c和φ值的確定方法對(duì)邊坡工程的分析與設(shè)計(jì)具有重要的實(shí)際意義。 反演分析采用的邊坡穩(wěn)定性分析模型不同,反算得到的強(qiáng)度參數(shù)值也會(huì)有所差異。目前國(guó)內(nèi)外邊坡穩(wěn)定性分析最常用的方法為極限平衡條分法,其中傳遞系數(shù)法在折線形滑面邊坡的應(yīng)用最為廣泛。本文以垂直分條折線形滑面邊坡作為計(jì)算模型,考慮孔隙水壓力的影響,運(yùn)用傳遞系數(shù)法反算滑面強(qiáng)度參數(shù)c、φ值。鑒于極限分析上限定理考慮了巖土體材料的應(yīng)力——應(yīng)變關(guān)系,又較之傳遞系數(shù)法具有嚴(yán)格的理論基礎(chǔ),本文提出了基于極限分析上限法的強(qiáng)度參數(shù)反演分析新方法。 由于自然界發(fā)生的滑坡絕大多數(shù)呈三維形態(tài),而且部分滑坡體的三維效應(yīng)極為明顯。而二維分析只是對(duì)滑坡體行為的逼近模擬,忽略了滑坡體的側(cè)向約束作用,不能反映滑坡體的實(shí)際形態(tài),故本文將二維邊坡極限分析擴(kuò)展為三維極限分析,并將二、三維反演結(jié)果進(jìn)行對(duì)比分析。 傳統(tǒng)的確定性邊坡穩(wěn)定性分析方法未能考慮巖土參數(shù)的隨機(jī)性和不確定性對(duì)邊坡穩(wěn)定性的影響,因此本文將概率可靠度理論和反分析方法相結(jié)合,提出了一種簡(jiǎn)單實(shí)用的滑坡強(qiáng)度參數(shù)反演新方法。 通過湘西朱雀洞滑坡工程實(shí)例反演結(jié)果的對(duì)比分析表明,基于二維、三維邊坡極限分析方法、概率可靠度理論方法和傳統(tǒng)的傳遞系數(shù)法的邊坡滑面強(qiáng)度參數(shù)反演結(jié)果具有較好的一致性,并與現(xiàn)場(chǎng)勘測(cè)試驗(yàn)值吻合良好,驗(yàn)證了本文提出的滑坡強(qiáng)度參數(shù)反演新方法的有效性。三維極限分析上限法反演的強(qiáng)度參數(shù)比二維極限分析方法的反演結(jié)果小,體現(xiàn)了滑坡體的側(cè)向約束作用,反演結(jié)果更能反映滑坡的真實(shí)情況。
[Abstract]:Landslide disaster brings serious threat to the sustainable development of society and people's life and property. The frequent occurrence of landslide disasters and the investment of funds for strengthening and treating make the research of landslide disasters become a hot and difficult problem. The shear strength parameters c and 蠁 of rock and soil are the basis of slope stability analysis and design, and the value of shear strength is the key to the reliability of slope stability analysis. Therefore, it is of great practical significance to study the determination method of c and 蠁 values for the analysis and design of slope engineering. Different slope stability analysis models are used in inverse analysis, and the values of strength parameters obtained by inverse calculation will also be different. At present, the most commonly used method of slope stability analysis at home and abroad is the limit equilibrium strip method, among which the transfer coefficient method is the most widely used in the slope of the zigzag slip surface. In this paper, the vertical zigzag slope is used as the calculation model, considering the influence of pore water pressure, the strength parameters c, 蠁 of the slip surface are calculated by transfer coefficient method. Since the upper limit theorem of limit analysis takes into account the stress-strain relationship of rock and soil materials and has a strict theoretical basis compared with the transfer coefficient method, a new method for inverse analysis of strength parameters based on the upper limit method of limit analysis is proposed in this paper. Most of the landslides occurring in nature show three-dimensional shape, and the three-dimensional effects of some landslide bodies are very obvious. The two-dimensional analysis is only the approximation simulation of the landslide behavior, neglecting the lateral constraint of the landslide, and can not reflect the actual form of the landslide, so this paper extends the two-dimensional slope limit analysis to three-dimensional limit analysis. The results of three-dimensional inversion are compared and analyzed. The traditional deterministic slope stability analysis method fails to consider the influence of randomness and uncertainty of rock and soil parameters on slope stability, so the probability reliability theory and the inverse analysis method are combined in this paper. A simple and practical method for inversion of landslide strength parameters is presented. The comparison and analysis of the inversion results of Vermilion Bird cave landslide engineering in western Hunan show that, based on two-dimensional and three-dimensional slope limit analysis method, The inversion results of slope slip surface strength parameters obtained by probabilistic reliability theory method and traditional transfer coefficient method are in good agreement with the field survey results. The validity of the new inversion method of landslide strength parameters proposed in this paper is verified. The inverse strength parameters of the upper limit method of 3D limit analysis are smaller than that of the two dimensional limit analysis method, which reflects the lateral constraint of landslide body, and the inversion result can reflect the real situation of landslide.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU43;P642.22

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 桂勁松,康海貴;結(jié)構(gòu)可靠度計(jì)算的最優(yōu)化方法及其Matlab實(shí)現(xiàn)[J];四川建筑科學(xué)研究;2004年02期

2 姚愛軍,易武,王尚慶;楊家?guī)X1~#滑坡穩(wěn)定性影響因素及敏感性分析[J];工程地質(zhì)學(xué)報(bào);2004年04期

3 朱彥鵬;劉星;;電子表格法在巖土工程可靠度分析中的應(yīng)用[J];甘肅科學(xué)學(xué)報(bào);2005年04期

4 曾鈴;蔣中明;付宏淵;;邊坡潛在滑動(dòng)面抗剪強(qiáng)度參數(shù)反演研究[J];中外公路;2011年02期

5 光耀華;巖質(zhì)高邊坡穩(wěn)定分析中的抗剪強(qiáng)度參數(shù)的概率統(tǒng)計(jì)方法[J];廣西科學(xué);1995年01期

6 高德軍;徐衛(wèi)亞;郭其達(dá);;長(zhǎng)江三峽大石板滑坡計(jì)算參數(shù)反分析[J];河海大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年01期

7 牛連超;高永濤;高斌;;某露天礦邊坡巖體力學(xué)參數(shù)反演及穩(wěn)定性分析[J];金屬礦山;2011年03期

8 郭兵兵;孫光中;孫強(qiáng);陳國(guó)祥;;邊坡巖土參數(shù)優(yōu)化確定方法研究[J];煤炭工程;2011年02期

9 V.R.Greco ,金培杰;失穩(wěn)斜坡的反演分析方法[J];路基工程;1996年03期

10 范明橋;粘性填筑土強(qiáng)度指標(biāo)φ,c的概率特性[J];水利水運(yùn)科學(xué)研究;2000年01期

相關(guān)博士學(xué)位論文 前1條

1 謝桂華;巖土參數(shù)隨機(jī)性分析與邊坡穩(wěn)定可靠度研究[D];中南大學(xué);2009年

，

本文編號(hào)：2103498