| 间隔时间对砂石桩动力触探检验结果的影响 |
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| 引用本文： | 朱小强,郑开盛,段超,邹琼.间隔时间对砂石桩动力触探检验结果的影响[J].土工基础,2011,25(5):45-47,65. |
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| 作者姓名： | 朱小强 郑开盛 段超 邹琼 |
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| 作者单位： | 1. 武汉王家墩中央商务区建设投资股份有限公司,武汉,430022
2. 泛海建设集团股份有限公司,北京,100004 |
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| 摘 要： | 砂石桩施工完成后须有一定间隔时间才能进行质量检验,但时间长短对检验结果影响的相关研究尚未见文献报道.现以某公园堆山软土地基的砂石桩为研究对象,采用0～39 d不等的时间间隔对长度为8m和22 m的砂石桩进行多次动力触探反复检验,以研究间隔时间对检验结果的影响.结果表明,动力触探是检测砂石桩密实度和长度的简单有效方法；砂石桩施工完成后,不宜立即开展动力触探检测工作；砂石桩施工约8d后,各深度砂石桩检测的动探击数趋于稳定,是进行动力触探检测的适宜时间.
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| 关 键 词： | 软土地基 砂石桩 动力触探 时间效应 |
Influence of Time on Dynamic Penetration Tests Used to Evaluate Ground Improved by Sand-Gravel Columns |
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| ZHU Xiao qiang,ZHENG Kai sheng,DUAN Chao,ZOU Qiong.Influence of Time on Dynamic Penetration Tests Used to Evaluate Ground Improved by Sand-Gravel Columns[J].Soie Engineering and Foundation,2011,25(5):45-47,65. |
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| Authors: | ZHU Xiao qiang ZHENG Kai sheng DUAN Chao ZOU Qiong |
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| Affiliation: | ZHU Xiao qiang,ZHENG Kai sheng,DUAN Chao,ZOU Qiong(Wuhan Wangjiadun CBD Construction & Investment Co.,Ltd,Wuhan 430071,China) |
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| Abstract: | In current ground improvement practice,a certain period of time is required after ground improvement by compacted sand-gravel columns before the in-situ quality assurance testing can be performed.However,the quantitative influence of time on the QA test results within the columns has not been reported.The influence of time on the QA results is evaluated through a case study of soft ground improved by compacted sand-gravel columns for man-made hills of a theme park.Dynamic Penetration Tests(DPT) were perform... |
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| Keywords: | soft ground sand-gravel column dynamic penetration test time effect |
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