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土质边坡中部与顶部抗滑桩动力响应和边坡变形比较
  • 期刊名称:山地学报,2010,第2期,135-140
  • 时间:0
  • 分类:P642[天文地球—工程地质学;天文地球—地质矿产勘探;天文地球—地质学] TU435[建筑科学—岩土工程;建筑科学—土工工程]
  • 作者机构:[1]西安理工大学岩土工程研究所,陕西西安710048, [2]清华大学水沙科学与水利水电工程国家重点实验室,北京100084
  • 相关基金:清华大学重点实验室项目(610103002),国家自然科学基金重点项目(50639060).
  • 相关项目:高土石坝变形分析与安全控制
中文摘要:

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。

英文摘要:

The difference of response of stabilizing piles in differently alized in aseismic design for the reinforced slope. In this paper, the installed position in slope should be properly redynami position and the deformation of slope were compared. Based on the seismic c response of piles in differently response, the investigation and installed 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.

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