
科学技术与工程

中国技术经济学会
夹持型BFRP锚固体系加固溃屈型边坡优化
Reinforcement of Buckling Slope with Basalt Fiber Reinforced Polymer Clamped Anchoring System
玄武岩纤维增强材料由于其优异的抗拉强度,以及制造过程环境友好性,使得其在边坡锚杆支护手段优化中有广阔前景。通过对比玄武岩纤维复合锚杆与传统钢锚杆,运用夹持式布置玄武岩纤维锚杆锚固体系加固溃屈型顺层边坡,推导夹持式锚杆界面荷载传递方程,并对该结构的加固效果进行有限元-光滑粒子流体动力学优化分析。结果表明:①溃屈型边坡受其破坏模式的时空效应影响以位移加速度为零处区分为三段:受压段、弯曲隆起段、滑移段,锚杆加固体系分别锚固于受压-弯曲界面内与弯曲-滑移界面内时锚固效果最佳。②夹持式锚杆与锚固岩土体周围存在紧箍效应,夹持角的变化对顺层溃屈型边坡的紧箍作用存在重要影响,当夹持角位于20°~30°时锚固效果达到最优。③有限元-光滑粒子流体动力学分析法模拟从边坡裂缝发展到溃屈破坏过程,提供相比有限元数值计算更为精确的锚固优化设计方案。
Basalt fiber-reinforced polymers hold significant promise for the enhancement of slope techniques, leveraging their superior tensile properties and reduced carbon footprint relative to steel during fabrication. In a comparative analysis with steel counterparts, a novel clamping mechanism for basalt fiber reinforced polymer (BFRP) bolt systems were implemented to bolster the stability of buckling-type bedding slopes. The derivation of the load transfer equation at the clamping bolt interface was facilitated the optimization of this structural reinforcement's efficacy on the buckling-type slope, employing a hybrid finite element-discrete element approach. The results show these as follows. The slope susceptible to collapse is stratified into three discrete zones-bottom to top-reflecting the spatiotemporal characteristics of its failure mode: a lower compression zone, an intermediate bending uplift zone, and an upper sliding zone. The anchor reinforcement system exerts its most efficacious support when installed at the junctions of these zones. A clamping interaction occurs at the interface between the secured bolt and the encompassing mass of rock and soil. The zenith of anchoring efficacy is realized within a clamping angle bracketed between 20° and 30°. The SPH (smooth particle hydrodynamics) method is capable of comprehensively simulating the cascade from incipient slope fracturing to the culmination of sliding failure. This approach affords a heightened degree of precision in the optimization of anchoring systems.
玄武岩纤维锚杆 / 边坡加固 / 夹持锚固体系 / 数值模拟 / 优化分析
basalt fiber reinforced polymer bolt / slope reinforcement / clamped bolt system / numerical simulation / optimized analysis
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