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(1 廣東省建筑科學(xué)研究院，廣州 510500；2 長(zhǎng)沙市軌道交通集團(tuán)有限公司，長(zhǎng)沙 410007）

[摘要]  運(yùn)用有限差分軟件FLAC^3D對(duì)邊坡進(jìn)行穩(wěn)定性分析，獲取邊坡潛在滑動(dòng)面后，根據(jù)極限平衡原理，獲取邊坡剩余下滑推力，為邊坡穩(wěn)定性問(wèn)題提供一種新的綜合性分析方法。運(yùn)用該方法對(duì)廣州市南沙區(qū)鹿頸小學(xué)后山邊坡進(jìn)行穩(wěn)定性分析，并與基于極限平衡法的瑞典條分法、簡(jiǎn)化Bishop法和Janbu法分析結(jié)果進(jìn)行對(duì)比。結(jié)果表明：采用結(jié)合極限平衡的邊坡有限差分穩(wěn)定性分析法對(duì)邊坡進(jìn)行穩(wěn)定性分析，獲得的邊坡潛在滑動(dòng)面能更真實(shí)反映邊坡的實(shí)際情況，求得的邊坡安全系數(shù)與剩余下滑推力更符合工程實(shí)際。利用該方法對(duì)邊坡進(jìn)行穩(wěn)定性分析能為邊坡支護(hù)設(shè)計(jì)提供合理的設(shè)計(jì)依據(jù)。

[關(guān)鍵詞]  邊坡；有限差分法；極限平衡法；穩(wěn)定性分析

中圖分類(lèi)號(hào)：TU459          文獻(xiàn)標(biāo)識(shí)碼：A          文章編號(hào)：

Slope stability analysis method based on finite difference combined with limit equilibrium

Liu Lian¹，Xiao Xinxin²，Lv Wenlong¹

 (1 Guangdong Province Academy of Building Research, Guangzhou 510500,China；2 Changsha Metro Group Co.,Ltd., Changsha 410007,China )

Abstract：By analyzing the slope stability with FLAC3D based on finite difference method, the potential slip surface can be found. And then the slope residual downslide thrust was obtained according to limit equilibrium method. This new method provided synthetic analysis on the slope stability. By implementing this method on the slope stability on Nansha Lujing elementary school in Guangzhou and comparing the result with limit equilibrium method, such as Swedish slip-circle method, simplified Bishop method and Janbu method, it is proved that the slope stability analysis method based on finite difference combined with limit equilibrium is feasible. The potential slip surface obtained by this method highly matches the actual situation of slope, the safety coefficient and residual downslide thrust deduced by this method also well fit actual situation. Analyzing the slope stability by this method can provide reasonable theoretical foundation for slope reinforce design.

Keywords：slope; finite difference method; limit equilibrium method; stability analysis

參   考   文   獻(xiàn)

[1] 張超,楊春和.有限差分強(qiáng)度折減法求解邊坡穩(wěn)定性[J].土木工程與管理學(xué)報(bào),2011,28(2):17~21.

[2] 陳祖煜.土質(zhì)邊坡穩(wěn)定性分析:原理·方法·程序[M].北京:中國(guó)水利水電出版社,2003.

[3] 劉戀.邊坡微型抗滑樁加固技術(shù)研究[D].長(zhǎng)沙:中南大學(xué),2012.

[4] 王文星.巖體力學(xué)[M].長(zhǎng)沙:中南大學(xué)出版社,2004.

[5] 謝和平.巖石、混凝土損失力學(xué)[M].徐州:中國(guó)礦業(yè)大學(xué)出版社，1990.

[6] ZIENKIEWICZ O C, HUMPHESON C, LEWIS R W. Associated and non-associated visco-plasticity and plasticity

in soil mechanics[J]. Geotechnique, 1975,25(4):671~689.

[7] GRIFFITHS D V, LAN P A. Slope stability analysis by finite element[J].Geotechnique ,1999,49(3):387~403.

[8] DAWSON E M , ROTH W H ,DRESCHER A .Slope

stability analysis by strength reduction [J].Geotechnique,1999,49(6):835~840.

[9] 宋二祥.土工結(jié)構(gòu)安全系數(shù)的有限元計(jì)算[J].巖土工程學(xué)報(bào),1997,19(2):1~7.

[10] 鄭穎人,趙尚毅.有限元強(qiáng)度折減法在土坡與巖坡中的應(yīng)用[J].巖石力學(xué)與工程學(xué)報(bào),2004,23(19):3381~3388.