【摘要】 地震作用及其诱发的变形或滑坡常会使抗滑桩受力发生显著变化,为此,研究了地震作用下不同加固位置的抗滑桩的动力响应和边坡变形情况。试验分析表明:中桩位边坡坡顶变形比高桩位边坡坡顶变形大,但中桩位边坡坡脚堆积变形比高桩位边坡坡脚变形较小;在同样条件下中桩位抗滑桩的静力、动力弯矩小于高桩位抗滑桩相应位置的弯矩;地震结束后由于坡体震动残余变形较大,抗滑桩最终承担着震后残余弯矩,但高桩位抗滑桩的承载能力在震后仍然发挥较大。研究结果表明:高桩位加固位置可以有效发挥抗滑桩的抗弯承载能力,但中桩位可以有效抑制坡底坡脚变形。更多还原

【Abstract】 The difference of response of stabilizing piles in differently installed position in slope should be properly realized in aseismic design for the reinforced slope.In this paper,the dynamic response of piles in differently installed position and the deformation of slope were compared.Based on the seismic response,the investigation and analyses evaluated the soil arching effect and effectively reinforced effect. According to the observed deformation of crest and bottom in slope,the settlement of slope’s peak with piles reinforced near crest of slope is less than that of piles in the middle of slope,and vice versa about the deformation of slope’s toe. Further more,the different behavior of the bending moment distribution of piles were discussed in different piles’ position in slope. The excess dynamic moments of piles near the crest are more than those of piles in the middle of slope. After the earthquake the residual moments of piles near the crest still are more than the values of piles in the middle of slope.更多还原