环氧沥青复合式隧道路表结构力学响应分析

由于传统隧道路面无法兼顾阻燃、抗滑降噪及耐久性等结构和功能性的需求，同时针对缺乏对高性能环氧沥青复合式隧道路表结构的研究现状。运用桥渡原理和有限元法，研究了环氧沥青复合式隧道路表结构不同荷载工况、层间接触状态、结构层厚度及应力吸收层类型对力学响应的影响规律，并结合经济性要求推荐了环氧沥青复合式隧道路表结构组合。结果表明：层底弯拉应力、弯拉应变、竖向剪应力和横向剪应力指标能较好表征结构实际受力状态；结构层厚度、超载及层间接触状态是结构疲劳寿命的重要影响因素，影响程度依次超载>层间接触状态>结构层厚度；未设应力吸收层的结构组合其抗疲劳性能更为优异；并将拟推荐结构于寻甸一号隧道试验路段进行铺筑。

Mechanical Response Analysis of Surface Structure of Epoxy Asphalt Compound Tunnel

Because the traditional tunnel pavement cannot meet the structural and functional requirements of flame retardant,anti-skid noise reduction and durability,at the same time,there is a lack of research status on high-performance epoxy-asphalt composite tunnel pavement structure.Using the principle of bridge crossing and finite element method;the influence of epoxy asphalt composite tunnel surface structure on mechanical response under different load conditions,inter layer contact state,structural layer thickness and stress absorption layer type is studied,combined with economic requirements.The combination of epoxy asphalt composite tunnel road surface structure is recommended for other requirements.The results show that the flexural tensile stress, flexural tensile strain, vertical shear stress and transverse shear stress at the bottom of the layer can better characterize the actual stress state of the structure;the thickness of the structure layer,the overload and the state of inter layer contact are important factors affecting the fatigue life of the structure,The degree of influence is overloaded>inter layer contact state>structure layer thickness;the structure combination without stress absorbing layer has better fatigue resistance;finally,the proposed structure combination will be pavement on Xundian No.1 test road.