| 掺入膨胀剂的挤扩支护桩试验研究 |
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| 引用本文： | 李启民,唐业清,何满潮.掺入膨胀剂的挤扩支护桩试验研究[J].岩土力学,2008,29(11):3139-3143. |
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| 作者姓名： | 李启民 唐业清 何满潮 |
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| 作者单位： | 1. 中国地质大学（北京），北京 100083；2. 北京交通大学，北京 100044；3. 中国矿业大学（北京），北京 100083 |
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| 摘 要： | 挤扩支护桩是一种先进的新型支护桩。通过掺入膨胀剂的钢筋混凝土扇形挤扩支护桩的试验研究，分析了其工作特性以及桩周土体挤密效应等，探讨了该桩在支护高度、桩身内力分配、内力计算等方面的规律。与普通混凝土扇形挤扩支护桩相比较，掺入膨胀剂的扇形挤扩支护桩弯矩最大值可减少20 %～30 %，桩顶位移平均减小33.5 %，在正常使用极限状态下地面荷载提高13 %。掺入膨胀剂的挤扩支护桩克服了普通挤扩支护桩混凝土收缩变形的缺点，有效地加固了桩周土体。
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| 关 键 词： | 掺入膨胀剂的扇形挤扩支护桩 工作特性 试验分析 计算方法 |
| 收稿时间： | 2008-03-21 |
Experimental research on squeezed scallop piles mixed expanding admixture as retaining and protecting for foundation excavation |
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| LI Qi-min,TANG Ye-qing,HE Man-chao.Experimental research on squeezed scallop piles mixed expanding admixture as retaining and protecting for foundation excavation[J].Rock and Soil Mechanics,2008,29(11):3139-3143. |
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| Authors: | LI Qi-min TANG Ye-qing HE Man-chao |
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| Institution: | 1. China University of Geosciences (Beijing), Beijing 100083, China; 2. Beijing Jiaotong University, Beijing 100044, China; 3. China University of Mining and Technology (Beijing), Beijing 100083, China |
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| Abstract: | As a new type of advanced pile of retaining and protecting for foundation excavation, the squeezed scallop pile mixed expanding admixture is studied experimentally. The intention of this paper is to survey the compaction efficiency against soil around pile, the mechanism, the retaining height, the inner stress distribution and calculation of squeezed scallop pile mixed expanding admixture as retaining and protecting for foundation excavation. Compared with common reinforced concrete retaining piles, the maj... |
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| Keywords: | squeezed scallop pile mixed expanding admixture characteristics experimental analysis calculation method |
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