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岩土工程中采用锚杆支护是维护边坡稳定的重要手段之一,以某边坡工程为背景,通过有限差分软件FLAC3D分析了锚杆长度、倾角及注浆粘结力的变化对边坡稳定性和锚杆剪应力的影响,发现锚固边坡存在最优锚固角和锚固长度,在其他因素不变的情况下,锚固倾角为20°左右时边坡的安全系数最大;注浆粘结力的改变并不影响锚杆中性点的位置。同时,研究了荷载沿锚杆的分布规律,说明全长粘结式锚杆对边坡滑动面有缝缀作用,且改善了坡体的结构性,从而提高了边坡的整体稳定性。
Rock bolt support is one of the important means to maintain the stability of slope. Taking the slope engineering as a background, the change of anchor length, inclination angle and grouting bond force is analyzed by finite difference software FLAC3D. Slope stability and bolt shear stress, it is found that the anchorage slope has the best anchorage angle and anchorage length. Under other conditions, the slope safety factor is the largest when the anchorage angle is about 20 °. The change of strength does not affect the position of the neutral point of the bolt. At the same time, the distribution of load along the bolt is studied, which shows that the full-length cohesive anchor has the effect of stitching on the sliding surface of the slope and improves the structural property of the slope so as to improve the overall stability of the slope.