| 长板-短桩组合型复合地基固结特性试验 |
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| 引用本文： | 叶观宝,陈健,邢皓枫,黄茂松.长板-短桩组合型复合地基固结特性试验[J].同济大学学报(自然科学版),2010,38(12):1725-1729. |
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| 作者姓名： | 叶观宝 陈健 邢皓枫 黄茂松 |
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| 作者单位： | 同济大学,岩土及地下工程教育部重点实验室,上海,200092;同济大学,地下建筑与工程系,上海,200092 |
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| 基金项目： | 国家“八六三”高技术研究发展计划（2007AA11Z117）,国家自然科学基金项目（50678130）,上海市重点学科建设资助项目（B308） |
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| 摘 要： | 长板-短桩组合型复合地基是由长塑料排水板与短水泥土搅拌桩组成的新型复合地基,该工法不仅利用短桩提高浅部地基承载力,而且通过长塑料排水板加快深部饱和软土的排水固结过程.针对长板-短桩工法处理上海A15I级公路深厚软基的固结特性,开展了现场试验研究,通过试验段不同位置和深度的超孔隙水压力、沉降变形以及桩土压力等参数随时间变化的观测与分析总结发现:排水板的存在,可以有效提高深厚软粘土的固结速率;长板-短桩组合型复合地基通过排水固结快速地提高桩间土强度,发挥桩间土承载作用;长板-短桩工法利用施工期的预压完成了80%以上的固结沉降,从而实现减小工后沉降的目的.
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| 关 键 词： | 复合地基 长板短桩工法 孔隙水压力 固结性状 桩土应力比 |
| 收稿时间： | 8/5/2009 10:57:08 AM |
| 修稿时间： | 2010/10/20 0:00:00 |
In situ Tests on Consolidation of Composite Foundation Composed of Short Cement soil Piles and Long Plastic Drainage Plates |
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| YE Guanbao,CHEN Jian,XING Haofeng and HUANG Maosong.In situ Tests on Consolidation of Composite Foundation Composed of Short Cement soil Piles and Long Plastic Drainage Plates[J].Journal of Tongji University(Natural Science),2010,38(12):1725-1729. |
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| Authors: | YE Guanbao CHEN Jian XING Haofeng and HUANG Maosong |
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| Institution: | Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education,Tongji University,Shanghai 200092,China; Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education,Tongji University,Shanghai 200092,China; Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education,Tongji University,Shanghai 200092,China; Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education,Tongji University,Shanghai 200092,China; Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China |
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| Abstract: | Short cement-soil piles and long plastic drainage plates are used to form a new composite foundation,which is called as D-M method.It not only improves the bearing capacity of the upper soft soil through the short soil-cement piles,but also accelerates the consolidation process of the deep soft soil through the action of long plastic drainage plates.Field tests were carried out to research the consolidation characteristic of this composite foundation at A15 high way in Shanghai,and the test results such as ... |
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| Keywords: | composite foundation D-M method pore water pressure degree of consolidation pile-soil stress ratio |
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