地震作用下土钉支护边坡稳定性分析

董建华;朱彦鹏

振动与冲击 ›› 2009, Vol. 28 ›› Issue (3) : 119-124.

PDF(1979 KB)
PDF(1979 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (3) : 119-124.
论文

地震作用下土钉支护边坡稳定性分析

  • 董建华, 朱彦鹏
作者信息 +

STABILITY ANALYSIS OF SLOPE PROTECTED BY SOIL NAILING RETAINING WALL UNDER EARTHQUAKE

  • DONG Jian-hua, ZHU Yan-peng
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摘要

考虑土钉对土质边坡稳定性影响的情况下,根据土体边坡滑动面的破坏模式,拟静力法,建立了地震作用下土钉支护边坡稳定性模型,推导了边坡滑移面圆心位置与稳定系数之间的函数关系。在水平地震作用下,竖向条分在计算地震惯性力和抗滑力矩时存在计算上的不合理,从而使地震惯性力与实际值有误差,抗滑力矩偏小,因此采用竖向条分和水平条分结合的方法对土钉支护边坡地震稳定性分析方法进行了改进。利用遗传算法对最危险滑移面的圆心进行动态搜索,并且避免了在圆弧搜索中陷入局部最小值的缺点。采用面向对象程序设计语言VC++编制了程序,实现了上钉支护边坡稳定最小安全系数的自动寻优。最后结合具体工程实例进行了验算,结果表明这种计算方法对土质较均匀的黄土地区是适用的。

Abstract

Under the situation of considering the soil nailing effects on stability of soil side-slope,according to the damage model of the slip surface, the limit equilibrium theory and pseudo static approach,the seismic stability model and search model of the most dangerous slip surface are set up. The function relationship between stability coefficient and the center of circular slip surface is derived. Errors should be induced in calculating horizontal seismic inertial force and anti-sliding moment according to vertical slice. The seismic stability analysis method of slope protected by soil sailing is improved by using horizontal and vertical slice method. Calculation of the stability of slip surface is carried out by using the genetic algorithms. It can avoid getting in local minimum in optimal design. Using object-oriented programming language VC++, a computing program is implemented to make the optimization course reality. Finally,the method is applied to a case record. The results show the proposal method is credible.

关键词

土钉 / 边坡 / 地震稳定性 / 水平条分法 / 拟静力法

Key words

soil nailing / slope / seismic stability / horizontal slice method / pseudo static method

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导出引用
董建华;朱彦鹏. 地震作用下土钉支护边坡稳定性分析[J]. 振动与冲击, 2009, 28(3): 119-124
DONG Jian-hua;ZHU Yan-peng. STABILITY ANALYSIS OF SLOPE PROTECTED BY SOIL NAILING RETAINING WALL UNDER EARTHQUAKE[J]. Journal of Vibration and Shock, 2009, 28(3): 119-124

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