长达坂沟泥石流桩板墙拦挡结构极限抗冲压数值分析

发布时间：2018-11-26 12:52

【摘要】：近年来,中国接连发生的数次严重泥石流给人民的生命财产造成了严重损失,每年中国国土等部门均会投入大量的资金进行泥石流的治理。本文以长达坂沟泥石流灾害防治工程为背景,采用FLAC3D及理想弹塑性本构模型计算分析了长达坂沟泥石流桩板墙拦挡结构的极限抗冲压能力。通过分析计算结果得出以下结论:(1)在泥石流极限冲压下,混凝土桩板墙只是拉伸破坏,没有出现剪切破坏;(2)数值计算出的长达坂沟泥石流的桩板墙极限抗冲压力大于经验公式计算出的泥石流整体冲击压力;(3)挡板中下部和桩的中间部分拉伸破坏拉最严重,桩身最大位移发生在桩顶端;(4)桩和土体之间设置接触面和不设置接触面得出的桩板墙极限抗冲压力有一定的差距。
[Abstract]:In recent years, a number of serious debris flows occurred in China have caused serious losses to people's lives and property. Every year, China's land and other departments will invest a large amount of funds to control the debris flow. Based on the disaster prevention and control project of debris flow in Changdabangou, FLAC3D and ideal elastic-plastic constitutive model are used to calculate and analyze the ultimate anti-scour pressure ability of the debris flow pile and plate retaining structure. The results of analysis and calculation are as follows: (1) under the limit of debris flow, the concrete pile-slab wall is subjected to tensile failure, but not shear failure; (2) the ultimate impact pressure of pile and plate wall calculated by numerical method is greater than that calculated by empirical formula. (3) the tensile failure of the middle and lower part of the baffle and the middle part of the pile is the most serious, and the maximum displacement of the pile body occurs at the top of the pile, (4) the ultimate impact pressure of the pile-slab wall obtained by setting the contact surface between the pile and the soil is different from that of the pile wall without the contact surface.
【作者单位】：西南交通大学地球科学与环境工程学院;中铁西北科学研究院有限公司;中国铁道科学研究院研究生部;
【基金】：中铁科研院(科研)字(2015-KJ026-Z026-03)资助
【分类号】：P642.23

【相似文献】