| 海相淤泥软土地基强夯置换砂桩试验分析 |
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| 引用本文： | 徐东升,汪稔,孟庆山,胡明鉴.海相淤泥软土地基强夯置换砂桩试验分析[J].岩土力学,2009,30(12):3831-3836. |
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| 作者姓名： | 徐东升 汪稔 孟庆山 胡明鉴 |
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| 作者单位： | 中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,武汉,430071 |
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| 基金项目： | 国家自然科学基金重点项目，中国科学院武汉岩土力学研究所知识创新工程领域前沿项目 |
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| 摘 要： | 针对某海相淤泥软土的处理工程，选取了一强夯砂桩置换试验区，监测了强夯置换过程中夯坑及其周围土体的变形，超孔隙水压力的增长和消散情况以及深层土体水平位移。分析结果表明，单个置换砂桩夯击8次较为合理；强夯置换后静置一段时间，可以有效减小强夯过程中的超静孔隙水压力，且一遍强夯后静置7 d后超孔隙水压力基本消散完；深层土体的水平位移主要发生在地表以下3～6.5 m深度范围内。
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| 关 键 词： | 海相淤泥软土地基 强夯置换 砂桩 原位测试 |
| 收稿时间： | 2009-03-18 |
Field test analysis of dynamic consolidation and replacement sand pile on marine soft soil |
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| XU Dong-sheng,WANG Ren,MENG Qing-shan,HU Ming-jian.Field test analysis of dynamic consolidation and replacement sand pile on marine soft soil[J].Rock and Soil Mechanics,2009,30(12):3831-3836. |
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| Authors: | XU Dong-sheng WANG Ren MENG Qing-shan HU Ming-jian |
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| Institution: | State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | A field test area was selected for a marine soft soil treatment. Some factors such as settlement around tamping pit, settlement of sand pile, accumulation and dissipation of excess pore water pressure, and horizontal displacement of deep soil, are monitored during dynamic consolidation and replacement sand pile. Through analyzing the results, some useful conclusions are drawn as follows. First, eight times dynamic consolidation is reasonable for a replacement sand pile. Second, the excess pore water pressure will be effectively decreased after a short standing time; also most excess pore water pressure will dissipate completely after seven days of dynamic consolidation. Third, horizontal displacement of deep soil is taken place at 3?6.5 m depth. |
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| Keywords: | marine soft soil dynamic consolidation and replacement sand pile in-suit testing |
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