黄土地区地铁隧道地层变形规律

发布时间：2018-01-04 19:04

本文关键词：黄土地区地铁隧道地层变形规律　出处：《西安科技大学学报》2015年03期 　论文类型：期刊论文

【摘要】：地铁隧道的施工必然会对周围的岩土体产生扰动,岩土体的固结和次固结将使地层产生沉降变形,而地层中存在各式各样的地下管线,如果地层变形过大,将会危及这些管线的安全,如何确保地铁施工地下管线的安全是地铁施工的关键技术。研究黄土地区地铁隧道施工对周围邻近管线所处地层的变形影响规律的目的是在保证地铁隧道施工的同时,确保管线的变形满足管线的正常使用,为地铁隧道的安全高效施工提供技术支撑。以西安地铁一号线地铁施工工程为研究背景,在分析Peck经验公式的基础上给出修正后的预测地层变形公式,在此基础上,研究距隧道轴线不同距离处的地层变形规律,以及不同地层损失率对地层变形的影响规律。采用预测公式对西安地铁一号线某区间段地下管线所处地层的变形进行预测,同时进行现场监测,通过预测与实测结果的对比验证该预测方法确实可行。在盾构施工前可对构筑物所处地层的变形进行预测,并可采取有效地加固措施以减小地铁施工对其影响。
[Abstract]:The subway tunnel construction inevitably disturbed the surrounding rock and soil, consolidation and secondary consolidation of rock and soil will enable the formation of settlement, and the existence of underground pipelines every kind of formation, if the stratum deformation is too large, will endanger the pipeline safety, how to ensure that the subway construction safety of underground pipelines is the key technology in subway construction the influence of deformation of loess area. The subway tunnel construction on the surrounding strata of adjacent pipelines to ensure tunnel construction at the same time, to ensure the normal use of the deformation to meet the pipeline pipeline, provide technical support for the safe and efficient construction of subway tunnel in Xi'an Metro Line subway construction project as the research background. Deformation prediction formula is modified after the formation in Peck is analyzed based on the empirical formula, based on the research from the tunnel axis at different distances from the ground The deformation law, and the loss rate of different strata influence of strata deformation. The prediction formula of deformation of strata at some sections of Xi'an subway line underground pipeline was predicted, and field monitoring, by comparing the predicted and measured results validate the prediction method is feasible. The deformation at formation of structures in the prediction of shield construction, and take effective measures to reduce the effect of reinforcement on the subway construction.

【作者单位】：西安科技大学建筑与土木工程学院;中国电建集团西北勘测设计研究院有限公司;武夷学院土木工程与建筑学院;西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金(51278397)
【分类号】：U451
【正文快照】： 0引言随着城市建设规模的不断扩大,城市化进程越来越快,城市人口急剧膨胀,道路交通越来越拥挤,地铁具有运量大、安全、舒适等优点,很多大城市都在大规模的修建地下铁路,而地下铁路是在复杂的岩土体中进行修建。同时由于城市的需要,在地层中分布着各式各样的地下管线,诸如自来

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