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| The improved variable seepage matrix method of the compound element for unsteady seepage flow with free surface |
| Received:November 20, 2007 |
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| DOI：10.7511/jslx20096009 |
| KeyWord:free surface unsteady seepage flow improved variable seepage matrix method deep foundation pit dewatering |
| Author | Institution |
| 刘金宝 |
上海市地质调查研究院 地面沉降研究所,上海 |
| 王寒梅 |
上海市地质调查研究院 地面沉降研究所,上海 |
| 张月萍 |
上海同岩土木工程科技有限公司,上海 |
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| Abstract: |
| he improved variable seepage matrix method of the compound element was presented for the seepage problem with free surface in the light of usage of continuous penalty function. Then the disadvantage of unsteady solution was optimized and the speed and precision were improved. The improved method was used for programming the finite element method on optimizing the reconstructed foundation pit dewatering of Dong Jia-du subway part of four line in Shanghai. It was utilized for simulating three dimension complex seepage field efficiently and subtly. At the same time, it was used to forecast the character of groundwater seepage filed and land subsidence around the foundation pit when the groundwater level of the foundation pit center reduced to forty meters below ground, under the top of confined aquifers and the free surface had larger difference inside and outside of foundation pit. |