全长黏结注浆格构锚固工程模型试验研究

发布时间：2018-04-10 11:22

本文选题：边坡工程 + 格构锚固　；参考：《岩石力学与工程学报》2017年04期

【摘要】：格构锚固工程在滑坡防治中的应用已越来越广泛,但其作用机制研究却远滞后于实际应用。针对全长黏结注浆工况下格构锚固工程的受力情况、破坏模式及作用机制,开展格构锚固工程大型物理模型试验。试验结果表明,全长注浆格构锚固可有效提高滑坡的稳定性;锚固力在滑面处最大,向两端递减,格构所承受锚固力很小,其基底反力呈跨中大节点小的近三角形分布;锚杆在滑面位置发生剪切变形,格构仅发生轻微挠曲变形,滑坡体发生整体滑移;锚杆发挥剪切抗滑作用,为主要抗滑构件,格构则保证了滑坡的整体稳定性;全长注浆工况格构锚固设计应注重校核锚杆的抗剪切能力,格构部分建议采用构造配筋设计。试验研究结果揭示了全长黏结注浆工况下格构锚固体系的力学抗滑机制,可供其他类似工程参考和借鉴。
[Abstract]:The application of lattice Anchorage engineering in landslide prevention and control has been more and more extensive, but the study of its action mechanism lags far behind the practical application.Aiming at the stress, failure mode and action mechanism of latticed Anchorage engineering under the condition of full-length cement grouting, the large-scale physical model test of latticed Anchorage engineering is carried out.The test results show that the full-length grouting lattice anchoring can effectively improve the stability of the landslide, the anchoring force is the largest at the sliding surface and decreases to the two ends, the anchor force of the lattice structure is very small, and the reaction force of the base is nearly triangular distribution with small span and large joints.The shear deformation of anchor rod occurs in the position of sliding surface, only slight flexural deformation occurs in lattice structure, and the whole slide occurs in landslide body, and the anchor rod plays the role of shear anti-slide, and the lattice structure ensures the overall stability of landslide.In the design of lattice Anchorage under full-length grouting condition, the shear resistance of anchor rod should be checked, and the structural reinforcement design should be adopted in the lattice structure part.The experimental results reveal the mechanical anti-sliding mechanism of latticed Anchorage system under the condition of full-length bond grouting, which can be used as reference for other similar projects.
【作者单位】：中国地质环境监测院;长安大学地质工程与测绘学院;陕西省地质环境监测总站;
【基金】：“十二五”国家科技支撑计划(2012BAK10B01) 国家级地质环境监测与预报项目(1210800000022) 国土资源大调查项目(1212011220145)~~
【分类号】：TU476;P642.22

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