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折线地基上路堤变形规律及安全状况评价

DOI: 10.3969/j.issn.1674-0696.2015.01.08, PP. 34-39

Keywords: 道路工程,填方路堤,变形规律,数值模拟,安全状况,roadengineering,fillembankment,deformationlaw,numericalsimulation,safetystatus

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Abstract:

:？为了研究折线地基上路堤变形规律，找到监测敏感点，进而基于变形规律对其安全状况进行评价，采用有限元软件PLAXIS对折线地基上路堤在填筑期、正常运营期以及降雨入渗情况下的变形规律进行数值模拟。结果表明：填筑期路堤监测敏感点主要分布在每层填筑的坡顶；运营期路堤会由于土体力学参数衰减而发生圆弧滑动破坏，监测敏感点位于坡顶拉裂区及坡脚滑动剪出口处；降雨条件下路堤会随着降雨深度的增加而发生局部滑动破坏，此时监测敏感点主要分布在雨水入渗范围内路堤的上部。最后依据路堤在变形发展过程中位移量的大小确定了路堤所处的风险等级。

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