| 土质滑坡格构锚杆抗滑机制及受力试验研究 |
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| 引用本文： | 韩冬冬,门玉明,胡兆江.土质滑坡格构锚杆抗滑机制及受力试验研究[J].岩土力学,2020,41(4):1189-1194. |
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| 作者姓名： | 韩冬冬 门玉明 胡兆江 |
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| 作者单位： | 1. 长安大学 地质工程与测绘学院，陕西 西安 710054；2. 信息产业部电子综合勘察研究院，陕西 西安 710054 |
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| 基金项目： | 国土资源大调查项目（No.1212011220145）；中央高校基本科研业务费专项资金项目（No.310826171016）；陕西省自然科学基础研究计划资助项目（No.2018JQ4044）。 |
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| 摘 要： | 通过滑坡防治格构锚固大型物理模型试验，分析了土质滑坡格构锚杆体系在坡顶荷载下的变形和位移，揭示了格构锚杆的抗滑机制，探讨了锚固力与坡体位移及锚杆变形的关系，提出了极限锚固力的计算方法。结果表明：滑坡滑动时，格构梁与坡体整体发生旋转滑移，锚杆在滑面处发生了弯曲变形，处于弯曲和轴向拉伸组合变形状态；格构锚杆的抗滑作用表现为锚杆在滑面处的抗剪抗滑和锚杆格构梁的挡土阻滑；格构锚杆的极限锚固力由初始预应力、锚杆弯曲变形引起锚拉力、坡体位移引起锚拉力三部分组成，可通过公式 计算。该研究结果可为格构锚固体系的优化设计提供一定的参考。
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| 关 键 词： | 土质滑坡 格构锚杆 抗滑机制 锚固力 |
| 收稿时间： | 2019-05-06 |
| 修稿时间： | 2019-07-12 |
Experimental study of anti-sliding mechanism and force of lattice
anchor in soil landslide |
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| HAN Dong-dong,MEN Yu-ming,HU Zhao-jiang.Experimental study of anti-sliding mechanism and force of lattice
anchor in soil landslide[J].Rock and Soil Mechanics,2020,41(4):1189-1194. |
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| Authors: | HAN Dong-dong MEN Yu-ming HU Zhao-jiang |
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| Institution: | 1. College of Geology Engineering and Geomatics, Chang’an University, Xi’an, Shaanxi 710054, China;
2. China Electronic Research Institute of Engineering Investigations and Design, Xi’an, Shaanxi 710054, China |
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| Abstract: | In this paper, a large-scale physical model test of landslide prevention and control was conducted to investigate the deformation and displacement of the lattice anchor system in soil landslide under the surcharged load on the top of the slope. The objectives revealed the anti-sliding mechanism of lattice anchor. The relationship between the anchorage force and slope displacement and anchor deformation was discussed, and a calculation method of the ultimate anchorage force was proposed. The results showed that when the landslide was initiated, the lattice beam and the slope as a whole-body rotate and slip, the bolts are bent and deformed at the slip surface, which was in a state of bending and tensile stress. The anti-sliding is implemented by the shear resistance of anchors near the sliding surface and by the retaining resistance of the lattice beam with anchors. The ultimate anchorage force of the lattice anchor consists of three parts: initial pre-stress of the bolt, anchor tension caused by bending deformation of the bolt and anchor tension caused by the slope displacement. It can be calculated by the formula: . The results can provide some reference for the optimal design of the lattice anchor system. |
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| Keywords: | soil landslide lattice anchor anti-sliding mechanism anchorage force |
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