地下道路复合式路面结构设计方法研究

发布时间：2018-04-30 18:45

本文选题：地下道路 + 复合式路面　；参考：《河北工业大学》2014年硕士论文

【摘要】：随着城市建设的发展，地下道路已进入快速发展阶段。目前，我国尚未对地下道路路面结构设计方法进行系统研究，也缺乏相应的技术规范和指南。本文以实体工程为依托，围绕地下道路温度场分析、交通量调查、轴载换算方法研究、损坏模式调查、地下道路复合式路面结构力学特点等内容进行系统研究，主要结论有： 1．在地下道路施工过程中埋设预埋式温度传感器，对道路运营期间的温度数据进行采集，并以实测温度为基础建立了地下道路复合式路面瞬态温度场分析模型。在调查中发现，地下道路复合式路面结构中水泥混凝土板底和板顶的温差较小，在结构设计时可以不用考虑水泥混凝土板的温度应力。 2．深入分析了天津市海河东路地下道路交通量以及车辆轴载情况，，提出了以单轴双轮组60KN作为地下道路的标准轴载。以沥青面层底部的拉应变以及层间剪应力为设计指标，推导得到了地下道路复合式路面轴载换算公式。 3．地下道路AC+CRC复合式路面结构的力学控制指标主要有：沥青层底弯拉应变，沥青层底最大剪应力及连续配筋混凝土层底弯拉应力；全面分析了各参数对沥青层及连续配筋混凝土层力学性能的影响。 4．提出了以沥青层疲劳开裂和层间剪切疲劳的沥青面层厚度设计模式，和以疲劳应力不超过抗弯拉强度来确定连续配筋混凝土板厚度的设计模式。
[Abstract]:With the development of urban construction, the underground road has entered the stage of rapid development. At present, our country has not yet systematically studied the design method of the underground road pavement structure, but also lacks the corresponding technical specifications and guidelines. This paper, based on the solid engineering, is based on the analysis of the temperature field of underground roads, traffic volume investigation, axle load conversion method and damage. Model investigation and mechanical characteristics of composite pavement structure of underground roads are systematically studied.
1. the pre buried temperature sensor is buried during the underground road construction, and the temperature data of the road operation is collected. The transient temperature field analysis model of the compound pavement of underground road is established on the basis of the measured temperature. In the investigation, the temperature difference between the bottom of the cement concrete slab and the top of the slab is found in the composite pavement structure of the underground road. The temperature stress of cement concrete slab can not be taken into account when the structure is designed.
2. the traffic volume of the underground road and the axle load of the Tianjin Haihe East Road are deeply analyzed, and the standard axle load of the underground road is put forward by the single axis double wheel group 60KN. The formula of the axle load conversion of the complex pavement of the underground road is derived by taking the tensile strain and the interlayer shear stress at the bottom of the asphalt surface as the design index.
The mechanical control indexes of the AC+CRC composite pavement structure of 3. underground road mainly include the bottom bending strain of the asphalt layer, the maximum shear stress at the bottom of the bituminous layer and the bending stress of the continuous reinforced concrete layer, and the impact of the parameters on the mechanical properties of the asphalt and continuous reinforced concrete layers is analyzed.
4. the design model of asphalt surface thickness with asphalt layer fatigue cracking and interlayer shear fatigue is proposed, and the design mode of the thickness of continuous reinforced concrete slab is determined by fatigue stress not exceeding the flexural tensile strength.

【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.2

【参考文献】