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| 刚性桩桩网复合地基桩顶段桩间土附加应力分析 | |
| 引用本文： | 刘俊飞,赵健,赵国堂,马建林,李化建.刚性桩桩网复合地基桩顶段桩间土附加应力分析[J].中国铁道科学,2011,32(2). |
| 作者姓名： | 刘俊飞 赵健 赵国堂 马建林 李化建 |
| 作者单位： | 1. 西南交通大学,土木工程学院,四川,成都,610031 2. 西南交通大学,土木工程学院,四川,成都,610031;京沪高速铁路股份有限公司,北京,100038 3. 中国铁道科学研究院铁道建筑研究所,北京,100081 |
| 基金项目： | 铁道部科技研究开发计划项目(2007G046) |
| 摘 要： | 结合铁路CFG桩复合地基现场试验,进行桩网复合地基桩顶段桩间土附加应力分析。试验表明,在路堤填土荷载作用下,桩顶段桩间土压力仅在一定深度范围内有所增加,并且桩间土附加应力随深度迅速衰减,而桩顶段桩身轴力随深度增大。采用轴对称圆柱坐标系,针对有无桩帽的刚性桩复合地基,选取单桩处理面积范围内土体进行桩土相互作用分析,得出刚性桩复合地基桩顶段桩间土附加应力的计算方法。分析结果表明,在桩间土内部的剪切力和桩与土间摩擦力的作用下,桩和桩间土所承担的荷载在桩顶段重新分配,使桩间土所承担的荷载减小,而桩身所承担的荷载增加。桩土间黏聚力和摩擦角越大,桩间土中附加应力衰减的速度越快。计算值与数值模拟及现场实测结果的对比表明,计算方法可靠。 |
| 关 键 词： | 桩网复合地基 桩间土 附加应力 负摩阻力 |
Additional Stress Analysis of Upper Soil between Piles in Rigid Pile-Net Composite Foundation |
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| LIU Junfei,ZHAO Jian,ZHAO Guotang,MA Jianlin,LI Huajian.Additional Stress Analysis of Upper Soil between Piles in Rigid Pile-Net Composite Foundation[J].China Railway Science,2011,32(2). | |
| Authors: | LIU Junfei ZHAO Jian ZHAO Guotang MA Jianlin LI Huajian |
| Institution: | LIU Junfei1,ZHAO Jian1,ZHAO Guotang1,2,MA Jianlin1,LI Huajian3(1.School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan610031,China,2.Beijing-Shanghai High Speed Railway Limited Company,Beijing100038,3.Railway Engineering Research Institute,China Academy of Railway Sciences,Beijing100081,China) |
| Abstract: | Combining with the field test of CFG pile-net composite foundation,the additional soil stress of upper soil between piles was analyzed.The test shows that the soil stress of upper soil is just increased in a certain range of depth,while the additional soil stress decreases quickly with depth and the axial force of upper pile increases with depth.Using axially symmetric cylindrical coordinate,for rigid-pile composite foundation without pile cap,the pile-soil interaction in the treatment area of single pile i... |
| Keywords: | Pile-net composite foundation Soil between piles Additional stress Negative friction |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |