| 开挖卸荷条件下单桩承载力特性的模型试验研究 |
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| 引用本文： | 陈锦剑,吴琼,王建华,夏小和.开挖卸荷条件下单桩承载力特性的模型试验研究[J].岩土工程学报,2010(Z2). |
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| 作者姓名： | 陈锦剑 吴琼 王建华 夏小和 |
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| 作者单位： | 上海交通大学土木工程系; |
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| 基金项目： | 国家自然科学基金项目(50679041) |
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| 摘 要： | 基坑开挖卸荷会导致开挖段桩侧摩阻力缺失以及坑底桩周土围压减小,削弱桩基承载力。针对桩周土体开挖卸荷条件下的单桩承载力特性进行室内模型试验研究,通过模拟地面试桩和坑底试桩的竖向静载模型试验,分析单桩荷载传递过程,测试单桩极限承载力,研究桩周土体开挖卸荷对桩基承载力的影响。对比开挖卸荷前单桩的承载特性,开挖卸荷后桩顶及桩底沉降量均有增加,桩身轴力以及桩端阻力有所增大,模型单桩极限承载力下降。
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| 关 键 词： | 开挖卸荷 单桩承载力 模型试验 |
Model tests on bearing capacity of single pile influenced by excavation |
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| CHEN Jin-jian,WU Qiong,WANG Jian-hua,XIA Xiao-he.Model tests on bearing capacity of single pile influenced by excavation[J].Chinese Journal of Geotechnical Engineering,2010(Z2). |
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| Authors: | CHEN Jin-jian WU Qiong WANG Jian-hua XIA Xiao-he |
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| Affiliation: | CHEN Jin-jian,WU Qiong,WANG Jian-hua,XIA Xiao-he (Department of Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China) |
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| Abstract: | Deep excavation unloading can decrease the bearing capacity of piles.It may cause the lose of skin friction of bored piles and the soil pressure of pit bottom decreased.Indoor model tests are used to analyze the bearing capacity characters of single pile under the excavation unloading.And analysis of the load transmission process of single pile and measurement of its ultimate bearing capacity are carried out by simulating vertical static load experiments of test pile at ground and pit bottom.The influence o... |
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| Keywords: | excavation unloading bearing capacity of single pile model test |
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