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根据锚杆在边坡中的空间分布情况,首次提出了俯斜锚杆、水平锚杆和仰斜锚杆概念,并基于仰斜锚杆注浆专利技术,将3类锚杆相互交错布置,提出了一种边坡复合锚杆支护技术。为进一步研究该类新型复合锚杆支护技术,基于坡面位移变形情况推导了3类锚杆应力及变形简化计算式,同时运用ANSYS软件对俯斜锚杆和仰斜锚杆两类支护方式进行了数值模拟分析验证。结果表明:较传统俯斜锚杆而言,仰斜锚杆能充分发挥其抗拉拔性能,在控制边坡位移方面效果显著,且锚杆旋转变形小有利于延长锚杆使用寿命;不足之处在于,其锚杆应力偏大,布置时易受空间限制。该类边坡复合锚杆支护技术尚处在理论研究阶段,若经工程实例验证可行后将会对各类边坡、滑坡以及危岩防治产生积极影响。
According to the spatial distribution of rock bolt in slope, the concept of inclined rock bolt, horizontal rock bolt and inclined rock bolt is put forward for the first time. Based on the patented technology of inclined rock bolt grouting, the three kinds of rock bolts are arranged alternately, Proposed a slope compound bolt support technology. In order to further study the new type of composite rock bolting technology, the simplified formulas for stress and deformation of three kinds of rock bolts are deduced based on the displacement and deformation of the slope. ANSYS software is used to simulate the deformation of the rock bolts, Way of numerical simulation analysis and verification. The results show that, compared with the traditional inclined anchor, the inclined anchor can give full play to its anti-pull performance, and has great effect in controlling the displacement of the slope. The small deformation of the anchor can prolong the service life of the anchor. The point is that the anchor stress is too large, space-constrained layout. This type of slope composite anchor support technology is still in the theoretical stage, if verified by the engineering examples will be on all kinds of slope, landslide and rock control have a positive impact.