| Axi-symmetric Active Earth Pressure for Layered Backfills Obtained by the Slip Line Method |
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| 作者姓名： | 刘发前 王建华 张璐璐 |
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| 作者单位： | School of Naval Architecture，Ocean and Civil Engineering，Shanghai Jiaotong University |
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| 基金项目： | 国家自然科学基金，the Shanghai Leading Academic Discipline Project |
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| 摘 要： | The axi-symmetric active earth pressure for layered backfills was investigated using the slip line method. Due to different soil properties, the interfaces of the soil layers were considered as discontinuity surface. Accordingly, the change of the major principal direction was obtained and a new computation scheme was proposed to deal with the discontinuity in the calculation, finally the slip line method was extended to layered backfills. Results indicate that, the major principal direction, as well as the earth pressure, has a finite jump on passing the soil interfaces. The magnitude of the jump depends on the soil properties mainly. Generally, the active earth pressure when a strong layer is overlying a weak layer is much larger than that when the weak layer is lying on the strong layer. The present solution can be reduced to plane strain case and it has been compared with Rankine's and Coulomb's results, and a good agreement is observed.
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| 关 键 词： | 土压力 回填土 摩擦系数 建筑施工 |
Axi-symmetric active earth pressure for layered backfills obtained by the slip line method |
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| Fa-qian Liu,Jian-hua Wang,Lu-lu Zhang.Axi-symmetric Active Earth Pressure for Layered Backfills Obtained by the Slip Line Method[J].Journal of Shanghai Jiaotong university,2008,13(5):579-584. |
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| Authors: | Fa-qian Liu Jian-hua Wang Lu-lu Zhang |
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| Institution: | (1) School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai, 200030, China |
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| Abstract: | The axi-symmetric active earth pressure for layered backfills was investigated using the slip line method. Due to different soil properties, the interfaces of the soil layers were considered as discontinuity surface. Accordingly, the change of the major principal direction was obtained and a new computation scheme was proposed to deal with the discontinuity in the calculation, finally the slip line method was extended to layered backfills. Results indicate that, the major principal direction, as well as the earth pressure, has a finite jump on passing the soil interfaces. The magnitude of the jump depends on the soil properties mainly. Generally, the active earth pressure when a strong layer is overlying a weak layer is much larger than that when the weak layer is lying on the strong layer. The present solution can be reduced to plane strain case and it has been compared with Rankine's and Coulomb's results, and a good agreement is observed. |
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| Keywords: | axi-symmetry earth pressure slip line method layered backfill soil-wall friction |
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