| 王乾坤， 徐国宾, 王传宏.水域水位变化对邻近复合地基支承路堤稳定性的影响研究Journal of Water Resources and Water Engineering[J].,2020,31(1):216-220 |
| 水域水位变化对邻近复合地基支承路堤稳定性的影响研究 |
| The influence of water level on the stability of the adjacent composite foundation embankment reinforced by piles |
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| DOI：10.11705/j.issn.1672-643X.2020.01.32 |
| 中文关键词: 路堤 复合地基 水位 路堤稳定性 有限差分方法 |
| 英文关键词: embankment composite foundation water level stability of embankment finite difference method |
| 基金项目:国家自然科学基金项目（51621096） |
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| 中文摘要: |
| 针对在水域边发生的复合地基支承路堤滑塌事故的问题，为研究水域及其水位变化对邻近复合地基支承路堤稳定性的影响，采用有限差分方法建立了三维数值模型，研究了水域及其水位变化对于桩体受力以及路堤变形的影响。结果表明：水域的存在将大幅提高桩体的受力，水域与路堤形成的先后顺序不同其影响也不一致，水位的突然降低将大幅增加桩体发生弯曲破坏的风险，对路堤的稳定性产生不利影响。不考虑水域以及水域水位变化的影响采用传统复合地基稳定分析方法将显著高估路堤稳定性。 |
| 英文摘要: |
| In allusion to the instability of embankment reinforced by piles when placed near the water area, a finite deference method was adopted to establish a three-dimensional numerical model to investigate the influence of water and water level on the stability. The changes of pile stress and settlement affected by water as well as water level were studied. The results revealed that the water area led to a significant increase of the pile stress which varied from the order of the formation of the water level and the embankment. The sudden decrease of water level greatly increased the risk of pile bending failure, which had an adverse impact on the stability of embankment. Without considering the influence of water area and water level change, the traditional composite foundation stability analysis method will significantly overestimate the stability of embankment. |
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