基于FLAC~(3D)数值模拟的沙虎山滑坡稳定性研究
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摘要
以徐州沙虎山滑坡为例,在野外工程地质测绘、钻探、室内试验基础上,论文运用三维有限差分软件FLAC~(3D)结合极限平衡理论,分析了不同工况下该滑坡的稳定性,对滑坡的发展趋势进行了预测。结果显示:该滑坡在天然状态下处于稳定状态;暴雨状态下处于不稳定状态。该研究成果,对滑坡在不确定因素下发生的状况进行了预测,对一般边坡的稳定性预防和治理提供了一定的借鉴意义,滑坡在治理过程中对其变形部位应重点控制,采取截排水措施,在雨季重点做好对滑坡的变形监测。
The purpose of this paper is to understand the formation mechanism of the stability of the Shahushan slope. Taking the Shahushan landslide in Xuzhou as an example, based on the field engineering geological mapping, drilling and laboratory tests, this paper uses the three-dimensional finite difference software FLAC~(3D) combined with the limit equilibrium theory to analyze the stability of the landslide under different working conditions and the development of the landslide. The results show that the landslide is in a stable state in the natural state; it is in an unstable state in the rainstorm state. The research results predict the occurrence of landslide under uncertain factors, and provide some reference for the stability prevention and treatment of general slopes. The landslide should be controlled by its deformation part during the treatment process. Drainage measures should be taken and focus on the deformation monitoring of landslides during the rainy season.
The purpose of this paper is to understand the formation mechanism of the stability of the Shahushan slope. Taking the Shahushan landslide in Xuzhou as an example, based on the field engineering geological mapping, drilling and laboratory tests, this paper uses the three-dimensional finite difference software FLAC~(3D) combined with the limit equilibrium theory to analyze the stability of the landslide under different working conditions and the development of the landslide. The results show that the landslide is in a stable state in the natural state; it is in an unstable state in the rainstorm state. The research results predict the occurrence of landslide under uncertain factors, and provide some reference for the stability prevention and treatment of general slopes. The landslide should be controlled by its deformation part during the treatment process. Drainage measures should be taken and focus on the deformation monitoring of landslides during the rainy season.
引文
[1]吴泊人,游昆骏,潘国林,等.皖南山区阳台古滑坡形成机制研究[J].工程地质学报, 2013, 21(2):304-310.
[2]张利洁,黄正加,雷菁. FLAC3D在边坡岩体稳定性分析中的应用[J].岩土力学, 2005(S2):61-64.
[3]张雪东,陈剑平,黄润秋,等.呷爬滑坡稳定性的FLAC3D数值模拟分析[J].岩土力学, 2003(S1):113-116.
[4] GRIFFITHS D V, LANE P A. Slope stability analysis by finite elements[J]. Geotechnique, 1999, 49(3):387-403.
[5]宋二祥.土工结构安全系数的有限元计算[J].岩土工程学报, 1997,19(2):1-7.
[6]赵尚毅,郑颖人,张玉芳.极限分析有限元法讲座—Ⅱ有限元强度折减法中边坡失稳的判据探讨[J].岩土力学, 2005,26(2):332-336.
[7]连镇营,韩国城,孔宪京.强度折减有限元法研究开挖边坡的稳定性[J].岩土工程学报, 2001, 23(4):407-411.
[8]栾茂田,武亚军,年廷凯.强度折减有限元法中边坡失稳的塑性区判据及其应用[J].防灾减灾工程学报, 2003, 23(3):1-8.
[9]季聪,佴磊,马宏,等. FLAC3D强度折减理论在边坡稳定分析中的应用[J].世界地质, 2013, 32(1):158-164.
[2]张利洁,黄正加,雷菁. FLAC3D在边坡岩体稳定性分析中的应用[J].岩土力学, 2005(S2):61-64.
[3]张雪东,陈剑平,黄润秋,等.呷爬滑坡稳定性的FLAC3D数值模拟分析[J].岩土力学, 2003(S1):113-116.
[4] GRIFFITHS D V, LANE P A. Slope stability analysis by finite elements[J]. Geotechnique, 1999, 49(3):387-403.
[5]宋二祥.土工结构安全系数的有限元计算[J].岩土工程学报, 1997,19(2):1-7.
[6]赵尚毅,郑颖人,张玉芳.极限分析有限元法讲座—Ⅱ有限元强度折减法中边坡失稳的判据探讨[J].岩土力学, 2005,26(2):332-336.
[7]连镇营,韩国城,孔宪京.强度折减有限元法研究开挖边坡的稳定性[J].岩土工程学报, 2001, 23(4):407-411.
[8]栾茂田,武亚军,年廷凯.强度折减有限元法中边坡失稳的塑性区判据及其应用[J].防灾减灾工程学报, 2003, 23(3):1-8.
[9]季聪,佴磊,马宏,等. FLAC3D强度折减理论在边坡稳定分析中的应用[J].世界地质, 2013, 32(1):158-164.