SPH-based simulation of flow process of a landslide at Hongao landfill in China
SPH-based simulation of flow process of a landslide at Hongao landfill in China
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DOI：
10.1007/s11069-018-3342-8
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发表时间：
2018-05
期刊：
影响因子：
3.7
通讯作者：
Chongqiang Zhu;Yu Huang;L. Zhan
中科院分区：
文献类型：
--
作者：
Chongqiang Zhu;Yu Huang;L. Zhan
填埋法因其处理成本低、处理量大、适应性强等优点，是目前最常用的建筑固体废物处理方法。然而，垃圾填埋场坍塌和山体滑坡很常见，对生命和财产构成威胁。2015年12月20日，中国深圳市光明新区红澳垃圾填埋场发生了一场灾难性的山体滑坡，并非由强降雨或地震引发。崩塌的弃土沿1100 m的斜坡向下流动，高差为100 m。该滑坡灾害是一种典型的长寿命、高流动性的灾害，给人民生命财产造成了巨大的损失。本文采用全三维光滑粒子流体动力学（SPH）方法再现了红澳垃圾填埋场滑坡的流场过程，并对滑坡到达区域进行了模拟。进行了一系列不排水环剪试验，以确定粘性系数的数值模拟。采用全三维SPH方法计算的滑坡体几何形状与实测数据吻合较好。因此，将环剪试验与SPH方法相结合，可以广泛应用于垃圾填埋场潜在滑坡的动力学行为预测，以减少或预防类似灾害的发生。
Landfills are the most popular means of disposing of construction solid waste owing to the low-cost, large treatment volume and strong adaptability. However, landfill collapses and landslides are common, posing a risk to lives and property. A catastrophic landslide, not triggered by heavy rainfall or earthquakes, occurred on December 20, 2015, at Hongao landfill in Guangming New district of Shenzhen, China. The collapsed waste soil flowed 1100 m down a slope with an elevation difference of 100 m. This catastrophic landslide is typical of long-runout disasters with high mobility, which result in great loss to life and property. In this paper, we focused on reproducing the flow processes and simulating the arriving area of the landslide at Hongao landfill using a full three-dimensional (3D) smoothed particle hydrodynamics (SPH) method. A series of undrained ring shear tests were conducted to determine the viscosity coefficient for the numerical simulation. The calculated geometry of the landslide using the full 3D SPH method agreed well with the field data. Hence, the combination of ring shear tests and SPH method can be widely used to predict the dynamic behavior of potential landslides in landfills, to reduce or prevent similar disasters.