| 排水粉喷桩(2D工法)中粉喷桩成桩质量试验研究 |
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| 引用本文： | 刘松玉,章定文,吴燕开,陈蕾. 排水粉喷桩(2D工法)中粉喷桩成桩质量试验研究[J]. 力学学报, 2006, 14(4): 542-546 |
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| 作者姓名： | 刘松玉 章定文 吴燕开 陈蕾 |
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| 作者单位： | 1. 东南大学交通学院岩土工程研究所,,南京210096;2. 广州西二环高速公路有限公司,广州510800 |
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| 基金项目： | 江苏省交通科技项目(03Y007) |
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| 摘 要： | 通过现场单桩及群桩试验研究,对比了粉喷桩周围是否打设塑料排水板时粉喷桩成桩质量的差异。试验结果表明,在粉喷桩桩周预先打设塑料排水板,利用排水板的排水导气作用,可以有效的提高粉喷桩沿桩身的喷粉均匀性,提高粉喷桩的桩身搅拌均匀性,从而提高桩身质量,特别是明显提高深部桩身质量,因此加大了粉喷桩加固软土地基的处理深度。
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| 关 键 词： | 粉喷桩 塑料排水板 桩身质量 标准贯入击数 无侧限抗压强度 |
| 收稿时间： | 2005-11-02 |
| 修稿时间： | 2005-12-22 |
THE EFFECT OF PVD INSTALLED SURROUNDING DJM COLUMNS ON THE COLUMNS QUALITY OF DJM COLUMNS FIELD TESTS FOR QUALITY OF DRY JET MIXED PILES WITH OR WITHOUT PREFABRICATED VERTICAL DRAINS IN SOFT SOILS |
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| LIU Songyu,ZHANG Dingwen,WU Yankai,CHEN Lei. THE EFFECT OF PVD INSTALLED SURROUNDING DJM COLUMNS ON THE COLUMNS QUALITY OF DJM COLUMNS FIELD TESTS FOR QUALITY OF DRY JET MIXED PILES WITH OR WITHOUT PREFABRICATED VERTICAL DRAINS IN SOFT SOILS[J]. chinese journal of theoretical and applied mechanics, 2006, 14(4): 542-546 |
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| Authors: | LIU Songyu ZHANG Dingwen WU Yankai CHEN Lei |
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| Affiliation: | 1. Institute of Geotechnical Engineering,Southeast University,Nanjing 210096;2. Guangzhou West 2nd Ring Expressway Co.Ltd,Guangzhou 510800 |
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| Abstract: | With the field testing to single piles and pile groups,the effect of prefabricated vertical drains(PVD) installed in advance surrounding the dry jet mixed(DJM) piles on the pile quality of DJM is presented in this paper.The testing results indicate that the standard penetration test blow counts and the unconfined compression strength of DJM columns with PVD are higher than those of DJM without PVD,especially in deeper layers.The fracturing caused by excess pore pressure during the DJM installation and the drainage provided by the PVC drains increase the permeability of surrounding clay,and thus make the installation of soil-cement columns easier and more uniform,especially in deeper layers. |
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| Keywords: | Dry jet mixed(DJM) piles Prefabricated vertical drains(PVD) Pile quality Standard penetration test blow count Unconfined compression strength |
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