交通荷载对低矮路堤工后沉降影响研究

发布时间：2018-04-17 09:29

本文选题：低矮路堤 + 交通荷载　；参考：《河北工业大学》2015年硕士论文

【摘要】：目前在快速公路的设计中,受构造物限制,路基填筑高度一般偏高,多数在3-4m之间。但是,高路堤存在很多缺点,例如:用土量大,占用耕地多,破坏植被,造成水土流失;沉降大,易受到暴雨冲刷塌万,增加边坡防护加固工程量,成本高;施工难度大,工期长;自然景观破坏严重,不能满足人们视觉,心理舒适,安全的需要。针对于这种现状,快速路采用低矮路堤和浅路堑方案,节约耕地资源,走可持续发展的道路,是未来城市快速路建设应着重解决的问题。本文首先从交通荷载作用下对低矮路堤影响的研究现状入手,经交通荷载的理论研究,对车辆荷载的特点、模拟方法进行分析,提出适合低矮路堤交通荷载模型的模拟方法。分析了交通荷载的动力特性和道路材料的动力特性,进行了交通荷载作用快速路低矮路堤路基响应的数值分析。通过三维道路计算有限元模型分析了交通荷载对路基工后沉降的影响。根据数值分析的研究成果和低矮路堤特点,展开了路堤高度影响因素、合理降低路堤高度的研究,提出了低矮路堤设计需要遵循的原则和设计流程,并从技术措施、构造措施两个方面阐述了降低路堤高度可以采用的具体设计方法。
[Abstract]:At present, in the design of expressway, the height of embankment filling is generally high, most of which are between 3-4m.However, there are many disadvantages of high embankment, such as: large amount of soil, large amount of cultivated land, destruction of vegetation, resulting in soil erosion, large settlement, easy to be washed and collapsed by heavy rain, increasing the amount of slope protection and reinforcement works, high cost, high difficulty in construction,Long construction period, serious damage to the natural landscape, can not meet the visual, psychological comfort, safety needs.In view of this situation, it is necessary to solve the problems of urban expressway construction in the future by adopting low embankment and shallow cutting scheme, saving cultivated land resources and taking the road of sustainable development.This paper begins with the current situation of research on the influence of low embankment under traffic load. Through the theoretical study of traffic load, the characteristics and simulation method of vehicle load are analyzed, and a simulation method suitable for traffic load model of low embankment is put forward.The dynamic characteristics of traffic load and the dynamic characteristics of road materials are analyzed, and the response of low embankment subgrade of expressway under traffic load is analyzed numerically.The influence of traffic load on the settlement of roadbed after construction is analyzed by the finite element model of 3D road calculation.According to the research results of numerical analysis and the characteristics of low embankment, the influencing factors of embankment height and the reasonable reduction of embankment height are studied. The principles and design flow of low embankment design are put forward, and the technical measures are given.The concrete design methods for reducing the height of embankment are expounded in two aspects of structural measures.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.1

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