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| 1 | 装配式水泥混凝土道面灌浆层的粘结特性显示文摘为解决装配式水泥混凝土道面应用中灌浆层的优选问题,设计了灌浆种类、板底粗糙程度、灌浆厚度和基层结构四因素三水平的正交试验方案,开展了竖向静态和疲劳加载试验以及侧向加载试验.结果表明:板底粗糙程度对灌浆层与面层粘结性能影响最大,灌浆种类对灌浆层与基层粘结性能以及道面结构承载性能影响最大;经疲劳加载后,面层的中性面会出现不同幅度的上移,挠度和压力与疲劳加载次数的关系曲线呈现出剧烈变化、线性变化和稳定3个阶段;侧向荷载作用下,高强无收缩灌浆料(CGM)与基层的粘结性能最好,侧向荷载与上层结构位移满足二次多项式关系.当灌浆材料为CGM、板底光滑、灌浆厚度为2.0 cm、基层结构为12%水泥稳定土时,道面灌浆层的粘结性最好. | 朱懋江 翁兴中 张俊 杨博瀚 刘军忠 | 2019 | 上海交通大学学报2019，53，6： | 5 |
| 2 | Load transfer laws of tensile anchors in rock masses with weak interlayers based on a shear-slipping updating model显示文摘The load transfer characteristics of a tensile anchor in the rock mass with weak interlayers were investigated,considering the nonuniform stress of the horizontally layered rock mass along anchors.An improved shear-slipping model was proposed to describe the stress evolution characteristics of the bolt-rock interface.Based on the improved model,analytical solutions of the axial force,shear stress distribution and load-displacement relationship considering the residual stress stage were established.The effects of the stratigraphic sequence,pulling force and bolt diameter on the stress distribution of the anchorage interface were evaluated by using analytical solutions.The results were verified by applying the finite difference numerical simulation method.The sensitivity of each parameter to the axial force and shear stress of the rock bolt was determined based on calculation of the sensitivity coefficient.The study results show that the axial force and shear stress tend to decrease nonuniformly along the rock bolt towards the anchorage depth.Due to the existence of weak interlayers,the shear stress mutates at the weak and hard rock interface,and the axial force appears to“rebound”at the bottom of the anchored section.Lithology has more significant effects on the axial force and shear stress at the bottom of the anchor than at the top of the anchor.The pulling force is more sensitive to the anchor stress than stratigraphic sequence when the bolt diameter is determined.This study provides a theoretical framework for the fundamental problem of tensile bolts in horizontally or vertically laminated rock masses,providing a theoretical basis for anchor design. | WANG Yan XIANG Xin LI Chang-dong ZHU Guo-qiang SONG Cheng-bin XIAN Jin-ye ZHANG Jia-jun | 2022 | Journal of Mountain Science2022，19，3： | 0 |
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