| 桩-土间剪切应力的传递探讨 |
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| 引用本文： | 聂如松,冷伍明,杨奇,魏巍.桩-土间剪切应力的传递探讨[J].岩土力学,2009,30(3):799-804. |
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| 作者姓名： | 聂如松 冷伍明 杨奇 魏巍 |
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| 作者单位： | 中南大学,土木建筑学院,长沙,410075 |
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| 摘 要： | 对不同情况下桩-土间剪切应力进行了初步的理论分析，并基于ADINA有限元程序，对不同情况下的桩-土间剪切应力进行了计算对比分析。结果表明，同种土体和桩体条件下，各种模式达到极限状态时桩-土间剪切应力不同，堆载作用下负摩擦力值最大，抗拔桩负摩阻力值最小，桩顶受压桩、托桩的摩阻力值介于其间；桩材泊松比在0.15～0.35范围内时，桩侧摩阻力随泊松比的增大而增大。所得结论有助于进一步认识桩-土相互作用规律以及桩-土荷载传递机制。
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| 关 键 词： | 桩 桩-土间剪应力 有限元法 泊松比 |
| 收稿时间： | 2007-10-16 |
Discussion on shear stress transfer between pile and soil |
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| NIE Ru-song,LENG Wu-ming,YANG Qi,WEI Wei.Discussion on shear stress transfer between pile and soil[J].Rock and Soil Mechanics,2009,30(3):799-804. |
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| Authors: | NIE Ru-song LENG Wu-ming YANG Qi WEI Wei |
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| Institution: | School of Civil Engineering and Architecture, Central South University, Changsha 410075, China |
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| Abstract: | Shear stresses induced by different modes in engineering are primary analyzed theoretically and calculated by ADINA finite element program. The results indicate that when soil and pile are same, the shear stresses between pile and soil under the ultimate situations of different modes are different; the negative friction on pile induced by surcharge is maximum; and the negative friction of uplift pile is minimum; the friction of pile top induced by pressing pile and bottom-loaded pile is between them. Poisson’s ratio of pile ranged from 0.15 to 0.35, the shaft resistance increases accordingly. The recognition of the shear stress induced by different modes is helpful for understanding the interaction behavior and the mechanism of load transfer between pile and soil. |
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| Keywords: | pile shear stress between pile and soil finite element method Poisson's ratio |
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