地震作用下尾矿库溃坝过程模型试验及加固方案

发布时间：2018-09-17 09:57

【摘要】：为研究地震作用下一般尾矿库的动力特性及破坏规律,探寻坝体加固方法,开展尾矿库概化模型振动台试验。由振动台提供水平动力,利用加速度传感器、激光位移传感器、动态数据采集系统及高速相机等设备获取坝顶加速度、位移及变形数据,分析尾矿库溃坝原因,提出坝体加固方案。试验结果表明,受地震荷载作用的尾矿坝,在坝体坡面2/3处出现"抛掷"现象;加速度放大系数随坝体高程变化不明显,随峰值加速度增加而递减;当峰值加速度达到0.4 g时,尾矿库经历液化、滑移、开裂,最终导致溃坝;溃坝后的泥浆沿下游不断演进直至停滞,堆积形态呈三角形;在坝底打抗滑桩加固能提高坝体的稳定性。
[Abstract]:In order to study the dynamic characteristics and failure law of general tailing reservoir under earthquake, the reinforcement method of dam body was explored, and the shaking table test of the general model of tailing reservoir was carried out. Using the acceleration sensor, laser displacement sensor, dynamic data acquisition system and high speed camera to obtain the acceleration, displacement and deformation data of the dam top, and to analyze the reason of the tailing dam break, the horizontal power is provided by the vibration table, the acceleration sensor, the laser displacement sensor, the dynamic data acquisition system and the high-speed camera, etc. The reinforcement scheme of dam body is put forward. The test results show that the tailings dam subjected to earthquake load appears the phenomenon of "throwing" at 2 / 3 of the slope of the dam, the acceleration magnification coefficient does not change obviously with the height of the dam, but decreases with the increase of the peak acceleration, and when the peak acceleration reaches 0.4 g, The tailings reservoir experienced liquefaction, slippage, cracking, resulting in dam break; the mud after dam break evolves continuously along the downstream until the stagnation, and the shape of accumulation is triangular; the stability of dam body can be improved by anti-slide pile reinforcement at the bottom of dam.
【作者单位】：辽宁工程技术大学土木与交通学院;辽宁工程技术大学力学与工程学院;辽宁工程技术大学矿业学院;内蒙古自治区安全生产监督管理局;
【基金】：国家自然科学基金青年基金资助(51504123) 辽宁省教育厅一般项目(L2015211)
【分类号】：TD926.4

【相似文献】