基于FDEM的戒台寺古滑体开裂破坏过程数值模拟

发布时间：2018-03-09 23:32

本文选题：戒台寺　切入点：FDEM　出处：《水文地质工程地质》2017年03期 　论文类型：期刊论文

【摘要】：戒台寺古滑坡体受多期构造运动控制,边坡岩体中裂缝发育,结构破碎,风化卸荷引起局部滑移严重。2005年,对古滑体Ⅰ级和Ⅱ级平台进行了综合治理,但2013年后期,戒台寺大雄宝殿后墙和后花园地面又发育多组裂缝,且在Ⅲ级平台坡脚处发现大量新断口崩塌坡积物,古滑体有复活征兆。为探索戒台寺古滑坡体从二次稳定到开裂破坏的变形机制和破坏特征,文章首先采用杂交有限元-离散元法(FDEM)建立戒台寺古滑坡体数值模型;然后,将模拟计算结果与现场GPS地表位移监测曲线和破坏特征进行对比分析,结果显示FDEM数值模型较好地再现了戒台寺古滑坡体局部开裂、扩展、贯通、脱离、滑移、碰撞和堆积全过程;最后,判断出戒台寺古滑坡体的危险区域,为古滑坡体深部力学监测点设置提供科学依据。
[Abstract]:Jietaisi landslide by multi period tectonic movement control, crack development, rock slope structure broken, weathering and unloading caused serious local slip.2005, on the ancient landslide grade I and II platform for the comprehensive management, but in late 2013, jietaisi Temple main hall wall and garden ground and development group III crack, and at the foot of the slope platform found a large number of new fracture collapse slope sediments, the ancient landslide revival sign. In order to explore the mechanism of deformation and failure characteristics of jietaisi landslide from the two to the stable crack, firstly, using hybrid finite element discrete element method (FDEM) to establish jietaisi the ancient landslide numerical model; then, the simulation results and the field of GPS surface displacement monitoring curve and failure characteristics were analyzed, the results show that FDEM model can well reproduce the jietaisi landslide local cracking, expansion, penetration, detachment, slide Shift, collision and stacking process; finally, judging from the dangerous area jietaisi landslide, and provide scientific basis for the ancient landslide deep mechanical monitoring point setting.

【作者单位】：深部岩土力学与地下工程国家重点实验室;中国矿业大学(北京)力学与建筑工程学院;绍兴文理学院土木工程学院;绍兴文理学院岩石力学与地质灾害实验中心;
【基金】：国家自然科学基金项目(41502323) 浙江省山体地质灾害防治协同创新中心开放基金项目(PCMGH-2016-z-02)
【分类号】：P642.22

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