唐津高速改扩建中液态粉煤灰路基的优化研究
发布时间：2019-06-11 00:32
【摘要】：随着大量道路的改扩建,尤其是高速公路的改扩建工程的展开,路堤填筑过程中面临的新旧路基间的不均匀沉降、路基稳定、桥头跳车以及桥台稳定等问题亟待解决。为了更好地解决上述问题,新型的轻质路基回填材料液态粉煤灰应运而生。本文通过室内实验、运用ANSYS模拟分析,对液态粉煤灰在路基拓宽中的应力应变规律以及桥头路堤填筑下的桥头跳车、桥台稳定等进行了系统分析,并提出了适用于工程实际的优化设计方案,同时进行了相关的监测验证。研究结果表明:液态粉煤灰用于路基拓宽时能减小新旧路基间的不均匀沉降,提高道路的整体稳定性;其用于桥头路堤回填时能够很好地缓解桥头跳车问题,提高桥台的整体稳定性。总之,液态粉煤灰的应用能很好的缓解高速公路改扩建工程中路基拓宽和桥头路堤填筑中的一系列问题,是十分理想的路堤填筑材料。
[Abstract]:With the reconstruction and expansion of a large number of roads, especially the expansion of expressway, the uneven settlement between new and old roadbed, subgrade stability, bridge head jump and bridge platform stability in the process of embankment filling need to be solved urgently. In order to better solve the above problems, a new type of light subgrade backfill material liquid fly ash emerges as the times require. In this paper, through laboratory experiments and ANSYS simulation analysis, the stress and strain law of liquid fly ash in subgrade widening, the vehicle jump at bridge head and the stability of bridge platform under embankment filling are systematically analyzed. The optimization design scheme suitable for engineering practice is put forward, and the relevant monitoring and verification are carried out at the same time. The results show that the uneven settlement between the old and the new roadbed can be reduced and the overall stability of the road can be improved when the liquid fly ash is used to broaden the roadbed. When it is used in backfilling of bridgehead embankment, it can alleviate the problem of vehicle jumping at bridgehead and improve the overall stability of bridge platform. In a word, the application of liquid fly ash can alleviate a series of problems in subgrade widening and bridge head embankment filling in expressway reconstruction and extension project, and it is a very ideal embankment filling material.
【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
本文编号：2496853
[Abstract]:With the reconstruction and expansion of a large number of roads, especially the expansion of expressway, the uneven settlement between new and old roadbed, subgrade stability, bridge head jump and bridge platform stability in the process of embankment filling need to be solved urgently. In order to better solve the above problems, a new type of light subgrade backfill material liquid fly ash emerges as the times require. In this paper, through laboratory experiments and ANSYS simulation analysis, the stress and strain law of liquid fly ash in subgrade widening, the vehicle jump at bridge head and the stability of bridge platform under embankment filling are systematically analyzed. The optimization design scheme suitable for engineering practice is put forward, and the relevant monitoring and verification are carried out at the same time. The results show that the uneven settlement between the old and the new roadbed can be reduced and the overall stability of the road can be improved when the liquid fly ash is used to broaden the roadbed. When it is used in backfilling of bridgehead embankment, it can alleviate the problem of vehicle jumping at bridgehead and improve the overall stability of bridge platform. In a word, the application of liquid fly ash can alleviate a series of problems in subgrade widening and bridge head embankment filling in expressway reconstruction and extension project, and it is a very ideal embankment filling material.
【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
【参考文献】
相关博士学位论文 前1条
1 高翔;高速公路新老路基相互作用分析与处理技术研究[D];东南大学;2006年
，本文编号：2496853
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