双排抗滑桩抗震性能振动台试验研究及数值分析

发布时间：2018-05-30 00:29

本文选题：双排抗滑桩 + 振动台模型试验　；参考：《中南大学学报(自然科学版)》2015年11期

【摘要】：为探讨双排抗滑桩支护下边坡的地震响应及破坏机理,进行振动台模型试验及数值分析。研究结果表明:由于边坡上部缺乏必要支护,裂缝首先在靠近坡顶的坡面与滑面相交处产生;随着地震作用的增大,裂缝沿着滑面向下发展,由于抗滑桩的支挡作用而改变下滑方向,最终发生越顶破坏;监测点加速度响应能够反映边坡的物理特性,当坡体产生裂缝或临近最终破坏时,加速度响应规律将发生突变;桩身动土应力分布形式受地震波峰值影响很大,在高烈度下边坡接近破坏时,滑坡推力主要由靠近滑体的桩体上部承担,因此,在抗震设计时桩体上部同样需要加强。
[Abstract]:In order to study the earthquake response and failure mechanism of slope supported by double-row anti-slide pile, shaking table model test and numerical analysis were carried out. The results show that, due to the lack of necessary support in the upper part of the slope, the cracks first occur at the intersection of the slope surface and the slip surface near the top of the slope, and with the increase of the earthquake action, the cracks develop along the sliding face. The acceleration response of the monitoring point can reflect the physical characteristics of the slope, and the law of acceleration response will be abrupt when the slope body has cracks or near the final failure, because of the change of the sliding direction due to the supporting action of the anti-slide pile, and the acceleration response of the monitoring point can reflect the physical characteristics of the slope. The stress distribution of dynamic soil of pile body is greatly affected by the peak of seismic wave. When the slope is close to failure under high intensity, the landslide thrust is mainly borne by the top of pile body near the sliding body, so the upper part of pile body also needs to be strengthened in seismic design.
【作者单位】：后勤工程学院军事土木工程系;重庆市地质灾害防治工程技术研究中心;重庆交通大学土木工程学院;中铁二院工程集团有限责任公司;香港科技大学土木工程系;
【基金】：国家重点研究发展规划(973计划)项目(2011CB013600) 国家自然科学基金资助项目(51378496) 重庆自然科学基金资助项目(CSTC2013jcyjys0002) 重庆市研究生科研创新项目(CYB15108)~~
【分类号】：TU435;TU473.1

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