| 车辆动荷载下偏压深基坑支护结构受力变形分析 |
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| 引用本文： | 彭智佳,张守昆,王永康,许世林,张佳文.车辆动荷载下偏压深基坑支护结构受力变形分析[J].路基工程,2021,0(6):161-165. |
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| 作者姓名： | 彭智佳 张守昆 王永康 许世林 张佳文 |
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| 作者单位： | 1.中交一公局集团有限公司，北京 100037 |
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| 摘 要： | 依托杭州某地铁车站偏压深基坑工程，基于PLAXIS有限元软件建立三维数值计算模型，分析车辆动荷载对基坑开挖变形影响。结果表明:随基坑开挖深度增加，基坑内竖向位移和墙体水平位移均呈现先增大后减小趋势；工程施工时，在开挖至第三层土体时需加大注意坑底竖向位移变化，防止基坑隆起过大影响施工；车辆动荷载对基坑影响深度有限，基坑开挖深度小于15 m时，车辆动荷载对基坑影响较大，应注意车辆荷载对土体稳定性和地连墙水平位移问题，宜采取相关保护措施。
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| 关 键 词： | 车辆动荷载 偏压深基坑 支护结构 数值模拟 受力分析 |
| 收稿时间： | 2021-01-11 |
Analysis of Force and Deformation of Supporting Structure for Asymmetrically Loaded Deep Foundation Pit under Dynamic Load of Vehicles |
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| Abstract: | Based on the asymmetrically load deep foundation pit of a subway station in Hangzhou, a three-dimensional numerical calculation model was established with PLAXIS finite element software to analyze the deformation impact of dynamic load of vehicles on foundation pit excavation. The result shows that, as the depth of excavation increases, both the vertical displacement inside the pit and the horizontal displacement of the wall present a trend of first increase and then decrease; when excavating to the third layer of soil mass in the construction, it requires to pay special attention on the change of vertical displacement of the pit bottom so as to prevent too large bottom heaving; the depth of foundation pit affected by dynamic load of vehicles is limited and, when the depth of excavation is less than 15 m, dynamic load of vehicles may have great impact on foundation pit and, at this time, the soil stability and the horizontal displacement of diaphragm wall shall be noticed and protected by proper measures. |
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