高速公路路基拓宽工程若干关键技术

发布时间：2018-07-04 07:30

本文选题：高速公路拓宽 + 模糊层次分析　；参考：《石家庄铁道大学》2017年硕士论文

【摘要】：对于高速公路拓宽工程而言,由于工期较为紧张,而且在施工现场受到土地资源的限制,其现场施工空间也随之减少;有些施工路段为了能够保证道路运营的安全,实施分段交通管制,在很大程度上增加了高速公路道路拓宽施工的难度。另外,高速公路拓宽工程完工后,依旧存在较多问题,主要集中表现在新旧路基不均匀沉降,反射至路面出现不同程度的裂缝等,对交通道路行车造成较大的危害。因此,对于高速公路拓宽工程需要进一步地深入研究,尤其针对高速公路旧路基拓宽施工所存在的问题,亟需找到更好地解决方案和施工措施,能够更好地实施高速公路拓宽工程。因此,选择恰当合适的高速公路拓宽方式至关重要。本文首先以目前国内的一些高速公路拓宽工程案例为研究背景,着重对五种不同的高速公路拓宽方案的优缺点进行深入分析,并且对高速公路拓宽方案模糊综合评价选择模型。其次,应用有限元软件ABAQUS,分析了高速公路拓宽施工中,拓宽宽度、高度以及拓宽方式等多种因素对差异性沉降的影响规律,以期为后续解决方案的选择提供依据,并且对旧路拓宽的设计与施工提供参考。最后,概括总结了高速公路拓宽的路基填筑形式,提出了路基拓宽施工的基本思路,从地基处理和路基本体两个方面进行分析,提出了能够有效防止出现差异性沉降的对策及方法。
[Abstract]:For the expressway widening project, because the construction period is relatively tight and the construction site is limited by the land resources, the construction space on the site is also reduced; some construction sections can ensure the safety of the road operation in order to ensure the safety of the road operation. The implementation of segmented traffic control greatly increases the difficulty of expressway road widening construction. In addition, after the completion of the expressway widening project, there are still many problems, mainly reflected in the uneven settlement of the old and new subgrade, reflected to the road surface cracks and so on, causing great harm to the traffic. Therefore, the expressway widening project needs to be further studied, especially in view of the existing problems in the construction of the old highway roadbed widening, it is urgent to find a better solution and construction measures. Can better carry out highway widening project. Therefore, it is very important to choose the appropriate and appropriate way to widen the highway. In this paper, based on some cases of expressway widening project in China, the advantages and disadvantages of five different expressway widening schemes are analyzed deeply, and the fuzzy comprehensive evaluation model of expressway widening scheme is selected. Secondly, using the finite element software Abaqus, this paper analyzes the influence of various factors, such as width, height and widening method, on the differential settlement in expressway widening construction, in order to provide the basis for the selection of subsequent solutions. And provides the reference to the old road widening design and the construction. Finally, the paper summarizes the embankment filling form of expressway widening, puts forward the basic ideas of roadbed widening construction, and analyzes the foundation treatment and roadbed body. The countermeasures and methods which can effectively prevent the differential settlement are put forward.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.1

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