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Study of the seismic performance of hybrid A-frame micropile/MSE (mechanically stabilized earth) wall
  • ISSN号:1671-3664
  • 期刊名称:《地震工程与工程振动:英文版》
  • 时间:0
  • 分类:P[天文地球]
  • 作者机构:[1]College of Civil & Transportation Engineering, Hohai University, Nanjing 210098, China, [2]Key Laboratory of Geohazard Prevention of Hilly Mountains, Ministry of Land and Resources of China, Fuzhou 350002, China, [3]Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China
  • 相关基金:National-Natural Science Foundation of China under Grant No. 51609040, Natural Science Foundation of Fujian Province under Grant No. 2016J05112, Natural Science Fotmdation of Fujian Province under Grant No. 2015J01158
中文摘要:

混合金字塔形建筑物 Micropile/MSE (机械地稳定的陆地) 对山脉车道合适的墙在这研究被提出:一双垂直、使道路表面倾向的 micropiles 从通过一面高速公路 MSE 墙的装填区域并且然后被抛锚进基础。堆积帽子和等级横梁被放在堆积顶上,然后一个道路障碍被连接片连接到等级横梁。MSE 围全球稳定性,本地稳定性和影响道路障碍的抵抗能被这个图案同时提高。为了验证混合金字塔形建筑物 micropile/MSE 墙的有用性和数字方法,规模模型测试和相应数字模拟的可靠性,被进行。然后,在有 micropiles 的加强前后的 MSE 墙的地震表演通过数字方法比较地被学习。结果显示混合金字塔形建筑物 micropile/MSE 墙罐头有效地控制导致地震的变丑,在道路表面的微分解决,借助于 micropiles 和 MSE 的僵硬软的联合的底部和加速上的适用的压力。在有 0.10.5 g 的振幅的地震下面的积累的排水量被 36.3%46.5% 减少,并且墙的顶上的加速扩大因素被 13.4% , 15.7% 和 19.3% 基于分别地装载的 0.1, 0.3 和 0.5 g 输入地震减少。另外,在陡峭的地面的 MSE 墙的导致地震的失败模式是沿着 backslope 滑动 MSE 区域,当时 micropiles 有效地控制滑动趋势。把时刻弄弯的最大的导致地震的堆积在在 MSE 和斜坡基础之间的接口,因此在接口加强堆积身体的加强是必要的。因此,混合金字塔形建筑物 micropile/MSE 墙系统有好地震性能,这被证明。

英文摘要:

The Hybrid A-Frame Micropile/MSE (mechanically stabilized earth) Wall suitable for mountain roadways is put forward in this study: a pair of vertical and inclined micropiles goes through the backfill region of a highway MSE Wall from the road surface and are then anchored into the foundation. The pile cap and grade beam are placed on the pile tops, and then a road barrier is connected to the grade beam by connecting pieces. The MSE wall's global stability, local stability and impact resistance of the road barrier can be enhanced simultaneously by this design. In order to validate the serviceability of the hybrid A-frame micropile/MSE wall and the reliability of the numerical method, scale model tests and a corresponding numerical simulation were conducted. Then, the seismic performance of the MSE walls before and after reinforcement with micropiles was studied comparatively through numerical methods. The results indicate that the hybrid A-frame micropile/ MSE wall can effectively control earthquake-induced deformation, differential settlement at the road surface, bearing pressure on the bottom and acceleration by means of a rigid-soft combination of micropiles and MSE. The accumulated displacement under earthquakes with amplitude of 0.1-0.5 g is reduced by 36.3%-46.5%, and the acceleration amplification factor on the top of the wall is reduced by 13.4%, 15.7% and 19.3% based on 0.1, 0.3 and 0.5 g input earthquake loading, respectively, In addition, the earthquake-induced failure mode of the MSE wall in steep terrain is the sliding of the MSE region along the backslope, while the micropiles effectively control the sliding trend. The maximum earthquake-induced pile bending moment is in the interface between MSE and slope foundation, so it is necessary to strengthen the reinforcement of the pile body in the interface. Hence, it is proven that the hybrid A-frame micropile/MSE wall system has good seismic performance.

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期刊信息
  • 《地震工程与工程振动:英文版》
  • 主管单位:中国地震局
  • 主办单位:中国地震局工程力学研究所
  • 主编:齐霄斋
  • 地址:哈尔滨学府路9号
  • 邮编:150080
  • 邮箱:
  • 电话:0451-86652649
  • 国际标准刊号:ISSN:1671-3664
  • 国内统一刊号:ISSN:23-1496/P
  • 邮发代号:14-247
  • 获奖情况:
  • 国内外数据库收录:
  • 美国工程索引,美国剑桥科学文摘,美国科学引文索引(扩展库),英国科学文摘数据库
  • 被引量:232