| 破坏和非破坏后注浆抗压桩受力性状现场试验研究 |
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| 引用本文： | 张忠苗,张乾青.破坏和非破坏后注浆抗压桩受力性状现场试验研究[J].岩土工程学报,2011,33(10):1601-1608. |
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| 作者姓名： | 张忠苗 张乾青 |
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| 作者单位： | 1. 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 ； 2. 浙江大学岩土工程研究所，浙江 杭州 310058 |
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| 基金项目： | 国家自然科学基金项目(51078330) |
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| 摘 要： | 通过桩身埋设有钢筋应力计的 2 根直径不同的破坏性和非破坏性后注浆抗压试桩现场静载试验，对比分析了破坏性和非破坏性后注浆抗压试桩的受力性状。现场试验表明，极限荷载下非破坏性和破坏性后注浆桩的桩端力荷载分担比约为 40% 且同一桩顶荷载水平下，桩端荷载分担比随桩径的增大而减小。最大试验荷载下非破坏性试桩浅层土侧阻力完全发挥并有侧阻软化趋势，而破坏性试桩全桩长范围桩侧阻力均表现为软化性状。实测发现不同土中桩侧摩阻力充分发挥时对应的桩顶沉降约为（ 1% ～ 4% ） D （ D 为桩径）。非破坏性试桩实测得到的桩端位移–桩端力曲线表现为硬化特性，而试桩破坏性试验中实测得到的桩端位移–桩端力曲线表现为软化特性。
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| 关 键 词： | 非破坏性试桩 破坏性试桩 后注浆技术 桩侧阻力 桩端阻力 |
| 收稿时间： | 2011-12-03 |
Field tests on behavior of destructive and non-destructive base-grouting piles under compression |
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| ZHANG Zhong-miao ,ZHANG Qian-qing.Field tests on behavior of destructive and non-destructive base-grouting piles under compression[J].Chinese Journal of Geotechnical Engineering,2011,33(10):1601-1608. |
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| Authors: | ZHANG Zhong-miao ZHANG Qian-qing |
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| Affiliation: | 1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China; 2. Institute of Geotechnical Engineering, Zhejiang University , Hangzhou 310058, China |
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| Abstract: | Field tests on the behaviors of one destructive base-grouting pile and one non-destructive base-grouting pile under compression are presented.The two piles have different diameters and are instrumented with rebar strain gauges along the pile shafts.The results of these full-scale loading tests show that the ratio of the tip load to the pile head load of the destructive and the non-destructive base-grouting piles is about 40% at the capacity load level,and it decreases with the increase of pile diameter at t... |
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| Keywords: | non-destructive pile destructive pile base-grouting technique skin friction tip resistance |
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