摘要
为提高隧道复合式沥青路面结构的使用寿命,从模型模拟出发,借助ABAQUS有限元软件,构建隧道复合式沥青路面结构的三维实体模型,系统分析研究不同轴载、轮胎作用位置以及超载工况下的隧道复合式沥青路面结构力学响应和层间稳定性。结果表明:基层推荐采取“19 cm厚上基层+20 cm厚下基层”的施工方案时,基层抗剪能力小幅度下降,但其抗弯拉能力有较大幅度提高,能减少混凝土板断裂风险;超载作用会引起沥青面层应力的显著增大从而造成路面的早期损坏,建议限制超载通行车辆;采用良好的层间粘结处置措施,有利于降低复合式路面层间破坏,有效延长隧道复合式沥青路面结构的使用寿命。
In order to improve the service life of composite asphalt pavement structure in tunnel,a three-dimensional solid model was constructed to analyze the mechanical response and inter-layer stability under different axial loads,tire-road contract positions and overload conditions with ABAQUS finite element software,respectively.The results show that when the scheme of"19 cm thick upper base+20 cm thick lower base"is recommended for the base construction,the shear strength of the base decreases slightly,but the bending strength of the base increases significantly,which can reduce the fracture risk of concrete slab.The overload effect will increase the tensilestress at bottom of asphalt layer significantly and cause the early damage of the pavement.The adoption of appropriate disposal measures forinterlayer bonding is conducive to reducing interlayer damage of composite pavement and effectively extending the service life of composite asphalt pavement structure in tunnel.
作者
丁瑞哲
于海利
邱胜华
陈贵锋
陈搏
DING Rui-zhe;YU Hai-li;QIU Sheng-hua;CHEN Gui-feng;CHEN Bo(The 1th Engineering Co.,Ltd.of China Railway 12th Bureau Group,Xi'an 710038,Shaanxi,China;Guangdong Nanyue Transportation Investment&Construction Co.,Ltd.,Guangzhou 510101,China;Xiaoning Institute of Roadway Engineering,Guangzhou,Guangdong 510641,China)
出处
《黑龙江交通科技》
2020年第1期148-152,共5页
Communications Science and Technology Heilongjiang
关键词
复合式路面
三维模型
力学响应
层间粘结
composite pavement
three-dimensional solid model
mechanical response
interlayer bonding
