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岩土工程中边坡锚固技术一直以来是学者们研究的热点问题。目前,由于注浆技术的限制,边坡锚固技术中依然主要采用的是俯斜式锚杆群锚的方式。该类锚固形式中锚杆与滑面近于正交,不能充分发挥锚杆的抗拉拔性能。鉴于此不足,文中提出了一类新型复合边坡锚固支护技术,并基于该复合锚固技术进行了室内模型试验。试验结果表明,运用新型复合锚杆支护后的边坡在初始变形时,承受荷载的能力比传统锚杆提高了约34%,达到破坏时其承载能力比传统锚杆支护的边坡提高了约2倍。同时,传统锚固形式边坡破坏变形量较大,位移随荷载的陡增现象不明显,边坡呈现的是柔性破坏;相反,采用复合锚固形式的边坡破坏变形量较小,位移随荷载陡增现象明显,边坡破坏更趋近于脆性破坏。
Geotechnical engineering slope anchoring technology has always been a hot issue for scholars. At present, due to the limitation of grouting technology, the method of inclined anchor group anchoring is still mainly used in slope anchoring technology. In this type of anchorage, the anchor rod and the sliding surface are close to normal, so that the anti-pull performance of the anchor rod can not be fully exerted. In view of this shortcoming, a new type of compound slope anchoring and supporting technology is proposed in this paper, and the indoor model test is carried out based on the composite anchoring technology. The test results show that when the new type of composite rock bolt support the slope, the capacity of bearing the load is increased by 34% than that of the traditional rock bolt in the initial deformation. When the slope is damaged, its bearing capacity is higher than that of the traditional rock bolt support About 2 times. At the same time, the deformation and deformation of the slope with the traditional anchorage form are larger, the displacement is not obvious with the steep increase of the load, and the slope shows the flexible failure. On the contrary, the deformation and deformation of the slope with the composite anchorage form is small, The obvious phenomenon is that the slope damage is closer to the brittle failure.