摘要
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。
Anchor bolt support is an important means to retain slope stability in geotechnical engineering.Taking a certain of slope engineering for an example,FLAC3 Dis used to analyze the impact of anchor bolt length,dip angle and grouting bond strength on the slope stability and anchor bolt shear stress.The results show that there exists the optimal anchoring angle and length.In the case of other factors remaining unchanged,the maximum safety factor of slope attains when the anchoring dip angle is 20°.Grouting bond has no impact on the position of bolt neutral point.Finally,a theoretical explanation was given to the distribution of stress along the rock bolt.The research indicates that the rock bolt stitches the sliding surface and improves the constructive property of the slope body,which raises the global stability of slope.
出处
《水电能源科学》
北大核心
2015年第4期135-138,共4页
Water Resources and Power
