| 浆固碎石桩成桩注浆影响范围现场试验研究 |
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| 引用本文： | 左威龙,刘汉龙,陈永辉.浆固碎石桩成桩注浆影响范围现场试验研究[J].岩土力学,2008,29(12):3329-3332. |
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| 作者姓名： | 左威龙 刘汉龙 陈永辉 |
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| 作者单位： | 河南大学岩土力学与堤坝工程教育部重点实验室,南京,210098;河海大学岩土工程科学研究所,南京,210098 |
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| 摘 要： | 浆同碎石桩作为一种新型桩基技术,不仅具有一般刚性桩的桩体置换作用,而且能改善桩周土的力学性质,从而可有效地提高复合地基的承载力及减小沉降变形.通过现场进行成桩前后的桩周土性质研究,验证了注浆对桩周土性质的改善作用,得出成桩时注浆影响范围及分布规律.针对黏性土中浆固碎石桩浆液挤密作用,按平面轴对称问题分析了塑性区边界条件及内部单元体的平衡条件,提出浆同碎石桩浆液影响范围的计算公式.理论公式计算结果与原位测试结果较为符合,从而验证了计算方法的合理性,这对浆固碎石桩的注浆加固具有一定的指导意义.
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| 关 键 词： | 浆固碎石桩 桩周七 注浆 原位测试 塑性区 |
| 收稿时间： | 2007-11-19 |
Field testing analysis of grouting impact range of grouting gravel pile |
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| ZUO Wei-long,LIU Han-long,CHEN Yong-hui.Field testing analysis of grouting impact range of grouting gravel pile[J].Rock and Soil Mechanics,2008,29(12):3329-3332. |
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| Authors: | ZUO Wei-long LIU Han-long CHEN Yong-hui |
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| Institution: | 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | Grouting gravel pile is a new technique of pile.It has the usual effectiveness of rigid pile composite foundation,furthermore,mechanical properties of soil around pile,which can increase bearing capacity of composite foundation and reduce its settlement.The property of soil around pile is tested in field before and after the pile is constructed,from which the grouting impact range and regularities of distribution are obtained.In allusion to clay soil around pile,the calculation formula of range impacted by ... |
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| Keywords: | grouting gravel pile soil around pile grouting in-situ test plastic zone |
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