格构锚固体系承载机理及破坏模式的试验研究

发布时间：2018-03-03 05:00

本文选题：格构锚固体系　切入点：物理试验研究　出处：《长江科学院院报》2017年06期 　论文类型：期刊论文

【摘要】：通过开展格构锚固体系与滑坡体相互作用的室内物理模型试验,测得格构锚固体系的梁下土体抗力、格梁内力、位移及变形破坏等关键数据,进而得出滑坡防治中格构锚固体系的承载机理与破坏模式。结果表明:在滑坡推力及锚索锚固力作用下,格梁节点处下部受拉、上部受压,跨中处下部受压、上部受拉,整体受力呈"S"曲线状;随着荷载的增加,格梁节点处向坡内弯曲变形、跨中处向坡外弯曲变形;格梁的主要破坏形式有跨中"弓"形弯折破坏、节点处受压碎裂破坏、格梁中间土体拱出破坏、格梁上方土体挤出破坏4种类型;格梁的主要破坏模式为塑性多绞弯折破坏。
[Abstract]:Through the laboratory physical model test of the interaction between the lattice Anchorage system and the landslide body, the key data such as soil resistance under the beam, internal force, displacement and deformation failure of the lattice Anchorage system are measured. Furthermore, the bearing mechanism and failure mode of latticed Anchorage system in landslide prevention and control are obtained. The results show that under the action of landslide thrust and anchoring force of anchor cable, the lower part of the grid beam is pulled, the upper part is compressed, the middle part of the span is compressed, and the upper part is pulled. The integral force is "S" curve shape; with the increase of load, the node of the lattice beam bends and deforms toward the slope, and the main failure form of the lattice beam is the "bow" bending failure in the span, and the compression fragmentation at the node, the main failure form of the lattice beam is "bow" in the middle of span. There are four types of soil arch failure and soil extrusion failure above lattice beam, and the main failure mode of lattice beam is plastic multi-twist bending failure.
【作者单位】：中国地质调查局地质灾害防治技术中心;中国地质科学院探矿工艺研究所;
【基金】：中国地质调查局二级资助项目(DD20160278);中国地质调查局工作资助项目(1212011220171)
【分类号】：P642.22;TU476

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