锚杆抗滑桩与普通抗滑桩加固黄土滑坡的对比试验研究

发布时间：2018-04-05 08:22

本文选题：锚杆抗滑桩　切入点：普通抗滑桩　出处：《长江科学院院报》2017年07期

【摘要】：通过开展3组不同桩锚结构(普通抗滑桩、锚杆抗滑桩)加固黄土滑坡的模型试验,测得不同桩锚模型的土体抗力、桩身弯矩及锚杆的应变,对不同结构形式的锚杆抗滑桩的受力形式、内力分布及破坏模式进行对比分析。结果表明:黄土滑坡防治中,锚杆抗滑桩受力结构呈"S"曲线状,桩顶位移平顺延续,土体抗力及桩身弯矩分布更均匀;增加桩顶锚杆排数,可以增大抗滑力;普通抗滑桩的破坏模式主要为塑性单铰破坏,锚杆抗滑桩主要为塑性单铰(或双铰)破坏,锚杆主要为弯剪-滑移破坏,桩周土主要为土拱塑性破坏。研究结果可为黄土滑坡防治中锚杆抗滑桩的设计理论提供技术支撑。
[Abstract]:Through the model tests of three groups of different pile and anchor structures (common anti-slide pile, anchor anti-slide pile) to strengthen loess landslide, the soil resistance, pile bending moment and the strain of anchor rod of different pile and anchor model were measured.The stress form, internal force distribution and failure mode of anti-slide anchor pile with different structure are compared and analyzed.The results show that in the prevention and control of loess landslide, the stress structure of anti-slide pile is "S" curve, the displacement of pile top is smooth, the distribution of soil resistance and bending moment of pile body is more uniform, and the anti-slide force can be increased by increasing the number of anchor bars at the top of pile.The failure mode of common anti-slide pile is mainly plastic single hinge failure, anchor pile is plastic single hinge (or double hinge) failure, anchor rod is bending shear slip failure, soil around pile is soil arch plastic failure.The research results can provide technical support for the design theory of Anchorage anti-slide pile in the prevention and control of loess landslide.
【作者单位】：中国地质科学院探矿工艺研究所;中国地质调查局地质灾害防治技术中心;长安大学地质工程与测绘学院;
【基金】：中国地质调查局二级项目(DD20160278);中国地质调查局工作项目(1212011220171,1212010914021)
【分类号】：P642.22;TU473

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