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针对散粒体锚固效应数值模拟存在的不足,通过试验设置多组参数,并对加锚散粒体结构施加荷载,以稳定后散粒体散落质量比例表征结构强度,探究不同因素对锚固效应的量化影响,同时深入分析了其作用机理.试验结果表明,适当增大散粒体的粒径、缩小锚杆间距或提高锚杆承托圆盘面积占结构底面积的比例都能够在一定程度上提升结构强度;考虑3种变量的共同影响,令变量J为粒径与锚杆间距之比乘以锚杆承托面积比,当J>0.15时结构强度已至最大,同时避免了材料的消耗;此外,增加锚杆所受预应力大小也能有效提高锚固强度,但当预应力达到某一临界值,继续增加预应力大小对提高强度的作用效果不再明显.
Aiming at the shortcomings of the numerical simulation of the anchorage effect of bulk solids, several parameters were set through experiments and the load was applied to the grouted bulk structure. The structural strength was characterized by the mass ratio of scattered particles after stabilization. The effects of different factors on anchoring effect Quantitative analysis and its mechanism of action.The experimental results show that increasing the particle size of granules, reducing the spacing of anchor rods or increasing the ratio of the supporting disc area of anchor rod to the bottom area of the structure can all be improved to a certain extent Considering the common influence of the three variables, let the variable J be the ratio of the particle diameter to the anchor spacing multiplied by the anchor bearing area ratio. When J> 0.15, the structural strength has been maximized, and the material consumption is avoided In addition, increasing the prestressing force on the anchor rod can also effectively improve the anchorage strength. However, when the prestressing force reaches a certain critical value, the effect of increasing the prestressing force on the strength is no longer obvious.