| 土体含水量对扩底桩上拔承载力影响研究 |
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| 引用本文： | 孔令刚,张革强,陈仁朋,陈云敏,邢月龙,应建国.土体含水量对扩底桩上拔承载力影响研究[J].岩石力学与工程学报,2011,30(Z2):3755-3762. |
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| 作者姓名： | 孔令刚 张革强 陈仁朋 陈云敏 邢月龙 应建国 |
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| 作者单位： | (1. 浙江大学 岩土工程研究所，浙江 杭州 310058；2. 浙江大学 软弱土与环境土工教育部重点实验室，浙江 杭州 310058；;
3. 浙江省电力设计院，浙江 杭州 310000) |
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| 摘 要： | 对不同含水量下粉土中扩底桩上拔性状进行分析，通过简化计算方法考虑土体含水量对土体变形模量和表观黏聚力的影响。首先，采用饱和及非饱和土体中扩底桩上拔大尺寸物理模型试验结果，对建立的计算模型合理性进行验证。在此基础上，研究土体饱和度对扩底桩上拔特性的影响和扩底桩极限上拔承载力随降雨时间及地下水位升降的变化规律。研究表明，土体饱和度变化对不同埋深的扩底桩上拔特性均有较大影响。降雨使浅层土体含水量增加，在相同的降雨时间内，埋深较浅的扩底桩上拔承载力下降明显；地下水位上升使不同埋深的扩底桩承载力均有明显降低。
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| 关 键 词： | 桩基工程扩底桩极限上拔承载力含水量数值分析 |
| 收稿时间： | 2010-06-25; |
THE INFLUENCE OF WATER CONTENT ON UPLIFT ULTIMATE CAPACITY OF ENLARGED BASE PILES IN UNSATURATED SILT |
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| KONG Linggang,ZHANG Geqiang,CHEN Renpeng,CHEN Yunmin,XING Yuelong,YING Jianguo.THE INFLUENCE OF WATER CONTENT ON UPLIFT ULTIMATE CAPACITY OF ENLARGED BASE PILES IN UNSATURATED SILT[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(Z2):3755-3762. |
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| Authors: | KONG Linggang ZHANG Geqiang CHEN Renpeng CHEN Yunmin XING Yuelong YING Jianguo |
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| Affiliation: | (1. Institute of Geotechnical Engineering，Zhejiang University，Hangzhou，Zhejiang 310058，China；2. MOE key Laboratory of Soft Soils and Geoenvironmental Engineering，Zhejiang University，Hangzhou，Zhejiang 310058，China；;
3. Zhejiang Electric Power Design Institute，Hangzhou，Zhejiang 310000，China) |
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| Abstract: | To evaluate the uplift behavior of enlarged base piles，a simplified numerical model for the piles in silt has been developed in this study and its calculated results are compared to the results of large-scale model tests. Agreement between the calculated results and the test results is excellent. A series of numerical analysis were then performed to investigate the effects of raining and ground water level on the uplift capacities of enlarged base piles with different depths. It is found that raining has a more significant influence on uplift capacities of the enlarged base piles with shallow embedment，while the variation of ground water level has a significant influence on the enlarged base piles with different depths. |
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| Keywords: | pile foundation enlarged base pile uplift ultimate capacity water content numerical analysis |
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