| Bearing Capacity of Mixed Pile with Stiffness Core |
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| 作者姓名： | 岳建伟 姜忻良 凌光荣 |
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| 作者单位： | School of Civil Engineering Tianjin University Tianjin 300072，China，School of Civil Engineering Henan University Kaifeng 475001，China，School of Civil Engineering Tianjin University，Tianjin 300072，China，Architectural Design and Research Institute of Tianjin University Tianjin 300072，China |
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| 基金项目： | Supported by National Natural Science Foundation of China( No. 59978028). |
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| 摘 要： | To study load transfer mechanism and bearing capacity of a mixed pile with stiffness core (MPSC), which is formed by inserting a precast reinforced concrete pile (PRCP), in-situ tests involving MPSCs with different lengths, diameters, water cement ratios and PRCPs, cement mixed piles, and drilling hole piles, were carried out. Limit bearing capacities, load-settlement curves and stress distribution of MPSCs and mixed piles were obtained. The load transfer between cement soil and PRCP was analyzed by finite element method (FEM). Test results and FEM analysis show that an MPSC has fully utilized the big friction from a cement mixed pile and the high compressive strength from a PRCP which transfers outer top load into the inner cement soil, and that inserting a PRCP into a mixed pile changes the stress distribution of a mixed pile and improves frictional resistance between a mixed pile and soil. The length and the section area on PRCP of an MPSC both have an optimum value. Adopting MPSC is effective in improving the bearing capacity of soft soil ground.
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| 关 键 词： | 刚性核 MPSC 混合堆 土木工程 挤压土壤效应 承载能力 |
| 收稿时间： | 2005-11-03 |
Bearing Capacity of Mixed Pile with Stiffness Core |
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| YUE Jianwei,JIANG Xinliang,LING Guangrong.Bearing Capacity of Mixed Pile with Stiffness Core[J].Transactions of Tianjin University,2006,12(3):204-208. |
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| Authors: | YUE Jianwei JIANG Xinliang LING Guangrong |
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| Abstract: | To study load transfer mechanism and bearing capacity of a mixed pile with stiffness core (MPSC), which is formed by inserting a precast reinforced concrete pile (PRCP), in-situ tests involving MPSCs with different lengths, diameters, water cement ratios and PRCPs, cement mixed piles, and drilling hole piles, were carried out. Limit bearing capacities, load-settlement curves and stress distribution of MPSCs and mixed piles were obtained. The load transfer between cement soil and PRCP was analyzed by finite element method (FEM). Test results and FEM analysis show that an MPSC has fully utilized the big friction from a cement mixed pile and the high compressive strength from a PRCP which transfers outer top load into the inner cement soil, and that inserting a PRCP into a mixed pile changes the stress distribution of a mixed pile and improves frictional resistance between a mixed pile and soil. The length and the section area on PRCP of an MPSC both have an optimum value. Adopting MPSC is effective in improving the bearing capacity of soft soil ground. |
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| Keywords: | mixed pile mixed pile with stiffness core (MPSC) pressing soil effect |
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