摘要
基于废旧轮胎良好的抗拉伸、耐老化及界面粗糙等特性,将废旧轮胎切割成条形成加筋条带,并以轮胎衍生集料作为回填材料,形成复合加筋边坡。结合粒子图像测速技术进行模型试验研究,建立数值模型研究不同加筋条件下的边坡力学响应。探讨轮胎条带层数、加筋位置、废旧轮胎集料(tire-derived aggregate, TDA)复合土加筋层厚度与荷载作用位置对边坡承载力的影响,得到加筋效果随加筋布置方式的变化趋势。结果表明,轮胎条带和TDA复合砂土均可起到良好的加筋效果,且复合加筋边坡承载力相比无加筋提高2倍左右。研究结果证实了采用轮胎条带-TDA复合加筋边坡的可行性,为进一步进行废旧轮胎在道路工程中的循环利用研究工作和工程应用提供了基础。
In order to reduce a lot of safety hazards and pollution problems of waste tire storage, a utilization method by cutting tires into strips and combined with tire derived aggregates reinforced sand material as composite reinforcement materials was proposed based on the well performance of tensile stiffness, aging resistance and rough interface properties. To verify the feasibility and effectiveness of this new reinforcement method, model tests combined with particle image velocimetry technique were performed, then numerical simulations were taken to expand the working conditions to study the mechanical behavior of reinforced slopes. The results showed that both tire strips and TDA reinforced soil could provide well reinforcement performance, and the combination of two methods could improve the bearing capacity of slope to about 2 times compared with no reinforcements. The influential factors such as the layer numbers of tire strips, the position and thickness of reinforcement layer, and the loading position of upper load were studied via numerical simulations, and the influence tendency of several layout methods impact on bearing capacity were obtained. The research results could verify the feasibility to utilize the composite reinforcement slope, and provide foundation for further research and engineering application of waste tire recycling in road engineering.
作者
孙杰
张宏博
程钰
刘羽
张洪波
刘志鲲
SUN Jie;ZHANG Hongbo;CHENG Yu;LIU Yu;ZHANG Hongbo;LIU Zhikun(College of Transportation,Shandong University of Science and Technology,Qingdao 266590,Shandong,China;School of Qilu Transporatation,Shandong University,Jinan 250061,Shandong,China;Jining Highway Devlopment Center,Jining 272100,Shandong,China)
出处
《山东大学学报（工学版）》
CAS
CSCD
北大核心
2023年第1期49-59,67,共12页
Journal of Shandong University（Engineering Science）
关键词
废旧轮胎
加筋边坡
极限承载力
复合加筋
数值模拟
waste tire
reinforced slope
ultimate bearing capacity
composite reinforcement
numerical simulation
