| 路堤下浆固碎石桩复合地基现场试验研究 |
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| 引用本文： | 闻世强,陈育民,丁选明,左威龙.路堤下浆固碎石桩复合地基现场试验研究[J].岩土力学,2010,31(5):1559-1563. |
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| 作者姓名： | 闻世强 陈育民 丁选明 左威龙 |
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| 作者单位： | 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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| 基金项目： | 江苏省"六大高峰"人才基金资助项目 |
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| 摘 要： | 浆固碎石桩是一种新型的桩基技术,结合其在宁波绕城高速公路软土路基处理中的工程应用,进行了路堤下浆固碎石桩复合地基现场试验研究,通过实测地基的竖向和侧向变形以及桩、土应力和孔隙水压力,分析了浆固碎石桩复合地基的主要工作性状。试验结果表明,浆固碎石桩复合地基总沉降量小,稳定速度快,工期短;桩顶应力集中现象明显,桩体置换作用明显,同时也发挥了桩间土的承载力特性;孔隙水压力消散速度较快,减小了次固结引起的工后沉降。
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| 关 键 词： | 浆固碎石桩 软土地基 地基处理 现场试验 复合地基 |
| 收稿时间： | 2009-10-21 |
Application of grouted gravel pile in soft subgrade improvement of expressway |
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| WEN Shi-qiang,CHEN Yu-min,DING Xuan-ming,ZUO Wei-long.Application of grouted gravel pile in soft subgrade improvement of expressway[J].Rock and Soil Mechanics,2010,31(5):1559-1563. |
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| Authors: | WEN Shi-qiang CHEN Yu-min DING Xuan-ming ZUO Wei-long |
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| Institution: | 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China |
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| Abstract: | Grouted gravel pile is a new technique of pile construction, load-bearing characteristics of grouted gravel pile composite foundation is analyzed based on its application to soft subgrade improvement of Ningbo round-city expressway. The settlement and lateral deformations of the subgrade are monitored in-situ; while the pore pressure, earth pressure between piles and pressure on the top of piles are also monitored. The monitor result indicates that: the total settlements are small and soon became stabilization, which is propitious for the construction; stress concentration on the top of piles is evident, which proved the replacement effect of pile is evident; pore pressure decreased soon, which reduced settlement after construction caused by secondary consolidation. |
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| Keywords: | grouted gravel pile soft foundation foundation treatment monitoring in-situ complex foundation |
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