| 渗流对基坑周边沉降的影响 |
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| 引用本文： | 何世秀,胡其志,庄心善.渗流对基坑周边沉降的影响[J].岩石力学与工程学报,2003,22(9):1551-1554. |
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| 作者姓名： | 何世秀 胡其志 庄心善 |
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| 作者单位： | 湖北工学院土木工程系,武汉,430064 |
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| 基金项目： | 湖北省教育厅重点项目(99A009)。 |
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| 摘 要： | 基坑开挖卸荷，使应力场发生变化，引起坑周地面沉降。基坑开挖降水措施引起的地下水渗流，形成渗流场，用流网进行描述，应用井流原理，由裘布依公式求出水面线，水面线上部的土体由浮重度变化为饱和重度，下部的土体产生了渗透力，这些变化增大了坑周土体固结值。把由开挖产生的应力场与渗流场叠加，并通过有限元模拟，求取基坑周边地表沉降值。通过对一实际工程的对比，其计算值与实测值接近。
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| 关 键 词： | 渗流力学 基坑 渗流 流网 地表沉陷 地面沉降 开挖 |
| 文章编号： | 1000-6915(2003)09-1551-04 |
| 收稿时间： | 2001-12-17 |
| 修稿时间： | 2001年12月17 |
INFLUENCE OF SEEPAGE ON GROUND SETTLEMENT OF DEEP FOUNDATION PIT |
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| He Shixiu,Hu Qizhi,Zhuang Xinshan.INFLUENCE OF SEEPAGE ON GROUND SETTLEMENT OF DEEP FOUNDATION PIT[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(9):1551-1554. |
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| Authors: | He Shixiu Hu Qizhi Zhuang Xinshan |
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| Abstract: | The stress field of soils will change and environmatal ground settle with excavition unloading of deep foundation pit. The seepage induced by lowering groundwater in deep foundation pit results in a seepage field and it could be described by flow net. The well-seepage theory and Dupit formula are applied. Over the flow profile buoyant unit weight of soil is changed to saturated one. Below the flow profile,the consolidation value of soil is incrased with permeable force. The seepage field is coupled with stress field,which is simulated by FEM. The value of ground settlement of foundation pit is acquired. Compared with a practical example,the calculated value is close to actually measured value for a deep foundation pit. |
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| Keywords: | seepage mechanics seepage of foundation pit flow net ground settlement |
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