| 大直径碎石桩软土成桩工艺研究 |
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| 引用本文： | 张蓓,杨晓杰,刘洋,马骄,田弋弘,李少华.大直径碎石桩软土成桩工艺研究[J].施工技术,2012,41(18):109-112. |
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| 作者姓名： | 张蓓 杨晓杰 刘洋 马骄 田弋弘 李少华 |
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| 作者单位： | 1. 上海建峰职业技术学院土木系,上海,201900
2. 中国矿业大学(北京)力学与建筑工程学院,北京,100083 |
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| 摘 要： | 采用振冲法和沉管法在低强度软土中施工大直径碎石桩,得到两种工法的施工控制参数,并对碎石桩桩身进行超重型动力触探检测。结果表明,振冲法和沉管法均可在不固结不排水强度小于15kPa的软土中成桩,振冲法施工碎石桩密实度高,均匀性较差,成桩长度不宜大于10m,沉管法施工碎石桩密实度较高,均匀性较好,成桩长度可达14～15m。
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| 关 键 词： | 地下工程 桩基础 碎石桩 振冲法 沉管法 动力触探试验 |
Construction Technology of Large-diameter Gravel Piles in Soft Soil |
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| Zhang Bei
,
Yang Xiaojie
,
Liu Yang
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Ma Jiao
,
Tian Yihong
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Li Shaohua.Construction Technology of Large-diameter Gravel Piles in Soft Soil[J].Construction Technology,2012,41(18):109-112. |
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| Authors: | Zhang Bei Yang Xiaojie Liu Yang Ma Jiao Tian Yihong Li Shaohua |
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| Affiliation: | 1.Civil Engineering Department,Shanghai Jianfeng College of Career Technology,Shanghai 201900,China; 2.School of Mechanics & Civil Engineering,China University of Mining & Technology,Beijing 100083,China) |
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| Abstract: | Based on constructing gravel piles in soft soil,the controlling parameters of vibroflotation piles and sinking pipe piles are obtained.The quality of piles are tested with dynamic penetration tests.The test results show that both the two kind piles can be formed in soft soil with less than 15kPa un-consolidation and undrained strength.Both of the two kinds of gravel plies have high density.The uniformity of vibroflotation gravel piles is poorer than piles constructed with sinking pipe method,and the length of vibroflotation gravel plies should not be longer than 10m.However the length of vibroflotation gravel plies can reach 14~15m. |
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| Keywords: | underground piles gravel piles vibroflotation method sinking pipe method dynamic penetration test |
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