论文部分内容阅读
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。
The application of lattice anchoring engineering in landslide prevention and control has become more and more widespread, but the research on its mechanism has lagged far behind the practical application. Aiming at the stress conditions, failure modes and mechanism of the lattice anchorage project under the conditions of full-length cement grouting, the large-scale physical model test of the lattice anchoring project is carried out. The experimental results show that the full-length grouting lattice anchoring can effectively improve the stability of landslide. The anchoring force is the largest at the sliding surface and decreases at both ends. The anchoring force of the lattice is very small, Small nearly triangular distribution; bolt shear deformation occurred in the sliding surface, lattice deformation occurred only slight deflection, the overall sliding landslide body; play a role in anti-sliding shear bolt, as the main anti-skid components, lattice The overall stability of the landslide is guaranteed; the whole-length grouting condition of the lattice anchorage design should pay attention to checking the anti-shear capacity of the anchor rod, and the structural part of the latticework is recommended to be constructed with reinforcement design. The experimental results reveal the mechanics anti-slide mechanism of the lattice anchoring system in the condition of full-length grouting grouting, which can be used for reference to other similar projects.