摘要
以舟曲泥石流灾害防治工程为背景,基于弹塑性有限差分方法计算分析了舟曲泥石流桩林拦挡结构的极限抗冲压能力。针对两种桩林拦挡结构设计方案,采用增量加载的数值计算方法确定了拦挡结构的侧向极限抗冲压力,并与规范建议的泥石流冲击力经验公式计算结果进行了校核。计算结果显示,舟曲泥石流桩林拦挡结构的侧向极限抗冲压力均大于经验公式计算的泥石流冲击力。
Based on the prevention engineering for debris flow disasters in Zhouqu County,the elastoplastic finite difference method is used to analyze the lateral limit pressure capacity of blocking structure of pile group.Two design schemes of blocking structure of pile group are established.The numerical method of increment loading is used to evaluate the lateral limit pressure capacity of blocking structure of pile group.The results from empirical formula,which recommended by the code is compared with numerical simulation.The results of numerical simulation suggest that the lateral limit pressure capacity of blocking structure of pile group for Zhouqu debris flow is higher than the results from the empirical formula.
出处
《甘肃地质》
2011年第2期60-65,共6页
Gansu Geology
