广西靖那高速坡荷隧道路面结构方案研究

发布时间：2018-02-03 11:10

本文关键词： 隧道路面复合式路面隧道温度场层间剪应力路面结构设计　出处：《长沙理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：近几年国内高速公路建设集中于中西部地区,隧道应用相对增多,如何合理选择隧道路面结构,提高隧道路面使用性能、延长使用寿命成为一个迫切需要解决的问题。目前有三种路面结构形式在隧道路面建设中被采用较多:水泥路面,具有承载能力高、耐久性好,热稳定性好,隧道内行车能见度好等优点,但接缝较多、开放交通慢,抗滑性能下降较快是其在隧道路面中应用存在的问题;沥青路面,表面平整无接缝、交通噪音小、养护便捷、开放交通快,但隧道中应用容易产生水损害,同时还需防范火灾发生;复合式沥青路面,行车舒适性好,造价低于水泥混凝土板进行配筋的复合式路面。但需要防止沥青面层形成反射裂缝。以广西靖那高速坡荷隧道路面为实体工程,对坡荷隧道路面结构进行设计,提出三种路面结构方案以供选择。首先,针对广西靖那高速坡荷隧道已有路面方案,分析隧道内温度场效应、复合式路面端部处理方式、隧道内水泥路面抗滑、降噪等因素,参阅有关规范文献,提出新路面结构方案,主要包括进出口路段沥青面层厚度、CRC板厚度、配筋设计、隧道内水泥路面抗滑降噪措施的确定。其次,以层间抗剪强度为设计指标,对复合式隧道路面结构进行分段设计。采用BISAR3.0软件将隧道路面结构视为弹性层状体系,计算不同结构厚度下沥青层与水泥板层间水平纵向剪应力和最大剪应力。根据我国超载严重的现状,分析不同轴载条件下最大剪应力变化规律,提出合理、经济的复合式隧道路面方案。最后,为解决沥青路面在隧道内使用存在的问题,如施工条件差、隧道内光线较暗等。提出一种全隧道采用连续配筋混凝土的路面结构方案。着重于隧道进出口与隧道中部在环境上存在的差异,主要表现为钢筋埋深处混凝土与路面硬化时最大温差和隧道内湿度的不同,对隧道内路面分段算出合理配筋率,验证隧道不同位置取不同钢筋配筋率的可行性,并指出隧道中铺筑连续配筋混凝土路面的一些施工要点。研究成果可为隧道路面结构方案设计提供依据,有一定的参考和应用价值。
[Abstract]:In recent years, the expressway construction in China is concentrated in the central and western regions, and the application of tunnel is increasing relatively. How to select the tunnel pavement structure reasonably and improve the performance of tunnel pavement. Prolonging service life is an urgent problem. At present, three kinds of pavement structures are widely used in tunnel pavement construction: cement pavement, with high bearing capacity, good durability, good thermal stability. There are many advantages such as good visibility in the tunnel, but the problems of its application in tunnel pavement are more joints, slow open traffic, and fast decline of anti-skid performance. Asphalt pavement has smooth surface without joint, low traffic noise, convenient maintenance and fast open traffic. However, the application of tunnel is easy to produce water damage, and at the same time, it is necessary to prevent fire. Compound asphalt pavement, good driving comfort. The cost of composite pavement is lower than that of cement concrete slab, but it is necessary to prevent the reflection crack in asphalt surface. The pavement structure of slope load tunnel is designed by using the pavement of Jingna high-speed slope load tunnel in Guangxi as a solid project. Three kinds of pavement structure schemes are put forward to choose. Firstly, aiming at the existing pavement scheme of Jingna high speed slope hill tunnel in Guangxi, the effect of temperature field in the tunnel, the treatment method of compound pavement end part, and the anti-slip of cement pavement in the tunnel are analyzed. Noise reduction and other factors, referring to the relevant specifications, proposed a new pavement structure plan, mainly including the thickness of asphalt surface and CRC plate thickness of import and export section, reinforcement design. Determination of anti-slip noise reduction measures for cement pavement in tunnel. Secondly, the shear strength between layers is taken as the design index. The composite tunnel pavement structure is designed in sections. The tunnel pavement structure is regarded as an elastic layered system by BISAR3.0 software. The horizontal longitudinal shear stress and maximum shear stress between asphalt layer and cement slab layer with different structural thickness are calculated. According to the present situation of serious overload in China, the variation law of maximum shear stress under different axial load conditions is analyzed and reasonable. Finally, in order to solve the problems existing in the use of asphalt pavement in the tunnel, such as poor construction conditions. This paper puts forward a road structure scheme in which continuous reinforced concrete is used in the whole tunnel, focusing on the difference between the entrance and exit of the tunnel and the middle part of the tunnel. The main performance is the difference of maximum temperature difference between concrete and pavement hardening and the difference of humidity in tunnel. The reasonable reinforcement ratio is calculated to verify the feasibility of different reinforcement ratio in different positions of tunnel. The main points of construction of continuous reinforced concrete pavement in tunnel are pointed out. The research results can provide the basis for the design of tunnel pavement structure and have certain reference and application value.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.2

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