不同框架锚杆布置方式对加固边坡效果影响分析研究

俯斜式锚杆,因其设计相对简单,施工方便,国内外在进行边坡防护时,得到大规模应用,但从其受力特性来看,此种布置方式不能充分发挥锚杆抗拉强度大的这一特点。基于此,本文通过数值模拟的方法对比分析研究了仰斜式、平行式、俯斜式三种不同锚杆布置形式在防治边坡时的加固效果并得到如下结论:在相同的框架梁结构的情况下,就单从监测点的位移变化来看,仰斜式的布置方式要优于平行式布置方式和俯斜式布置方式,俯斜式布置方式为最不利布置方式。当采用仰斜式锚杆进行边坡加固时,锚杆轴力偏大,在锚杆抗拉能力允许的情况下,仰斜式锚杆可充分发挥锚杆的优点,但在实际工程中需适当增加锚杆锚固段长度。采用仰斜式布置形式时,坡面无明显滑动,框架梁基本处于低受力状态,边坡加固效果要明显优于平行式布置方式和俯斜式布置方式。

Analysis and Research on the Effect of Different Arrangement of Frame Bolt on Slope Reinforcement

Because of its relatively simple design and convenient construction, the inclined bolt has been widely used in slope protection at home and abroad. However, from the perspective of its mechanical characteristics, this arrangement can not give full play to the high tensile strength of the bolt. Based on this, this paper analyzes and studies the reinforcement effect of three different bolt arrangements, i.e. oblique, parallel and oblique, in landslide prevention and control by numerical simulation. The conclusion is as follows: under the same frame beam structure, the oblique arrangement is superior to the parallel arrangement and oblique arrangement in terms of the displacement change of monitoring points The most disadvantageous layout is inclined layout. When the inclined bolt is used to reinforce the slope, the axial force of the bolt is too large. When the tensile capacity of the bolt is allowed, the inclined bolt can give full play to the advantages of the bolt, but the length of the bolt should be increased properly in the actual project. When the inclined arrangement is adopted, the slope has no obvious sliding, the frame beam is basically in a low stress state, and the reinforcement effect of the slope is obviously better than the parallel arrangement and the inclined arrangement.