荆志东, 王春雷, . 2010: 基于应力影响系数法的高边坡临界滑动面研究. 工程地质学报, 18(1): 109.
    引用本文: 荆志东, 王春雷, . 2010: 基于应力影响系数法的高边坡临界滑动面研究. 工程地质学报, 18(1): 109.
    JING Zhidong, WANG Chunlei, XIE Qiang. 2010: DETERMINATION OF CRITICAL SLIP SURFACE OF HIGHSTEEP SLOPE BASED ON THEORY OF THE STRESS EFFECT COEFFICIENT. JOURNAL OF ENGINEERING GEOLOGY, 18(1): 109.
    Citation: JING Zhidong, WANG Chunlei, XIE Qiang. 2010: DETERMINATION OF CRITICAL SLIP SURFACE OF HIGHSTEEP SLOPE BASED ON THEORY OF THE STRESS EFFECT COEFFICIENT. JOURNAL OF ENGINEERING GEOLOGY, 18(1): 109.

    基于应力影响系数法的高边坡临界滑动面研究

    DETERMINATION OF CRITICAL SLIP SURFACE OF HIGHSTEEP SLOPE BASED ON THEORY OF THE STRESS EFFECT COEFFICIENT

    • 摘要: 临界滑动面一方面是与岩体结构面和坡面的组合关系有关,另一方面与荷载大小及位置有关。三维条件下,均质岩高边坡的破坏机理比较复杂,临界滑动面的判定较为繁琐。本文基于应力影响系数法对荷载作用下对均质岩高边坡三维临界滑动面形态及位置进行初步判别,研究各因素变化对临界滑动面分布形态的影响,结果表明:荷载作用下均质岩高边坡空间临界滑动面主要发生在基础前侧区域,约为一不规则楔体,楔体尺寸与桥基尺寸、坡度及桥基距离有关,其中桥基距离影响最大,荷载强度对滑动面形态无影响。桥基荷载作用下均质岩高边坡临界滑动线范围随桥基尺寸、桥基距离增加而增大,随坡度增加,临界滑动线长度减小,深度增大。本文提出桥基荷载作用下均质岩高边坡临界滑动面范围确定公式,即:均质岩高边坡破坏长度Pw=08444L-05098+05759S+693716,破坏深度Ph=01148L+0171B+11725+00733S-5719。

       

      Abstract: The critical slip surface is controlled by two aspects,one is the combination relation with rock mass discontinuity and slope,another aspect is the size and the lie of the load. The failure mechanism of highsteep slope intact rock is very complex,the search for critical slip surface is tedious. The shape and position of 3D critical slip surface of highsteep slope intact rock under load are analyzed based on the stress effect coefficient. The effects of influence factors on the shape and position of 3D critical slip surface are analyzed. Results show that the shape of critical slip surface of highsteep slope intact rock under load should be an irregular wedge body and mainly in front region of the foundation,and the side of wedge is related to the size of bridge foundation,slope and the distance of bridge foundation. The load strength has no effect on the shape of critical slip surface,and the distance of bridge foundation has an important effect on it. The range of critical slip line of highsteep slope intact rock under load increases with the size or distance of bridge foundation,and with the slope increased,the length of critical slip line decreases,the depth increases. The range of 3D critical slip surface on highsteep slope intact rock is determined as follow:  Pw=08444L-05098+05759S+693716,Ph=01148L+0171B+11725+00733S-5719.

       

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