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| 超前支护桩桩后EPS垫层优化设置的数值模拟 | |
| 引用本文： | 孙洪利,刘元雪,叶四桥,冉仕平. 超前支护桩桩后EPS垫层优化设置的数值模拟[J]. 重庆交通大学学报(自然科学版), 2011, 30(4): 786-789,879. DOI: 10.3969/j.issn.1674-0696.2011.04.019 |
| 作者姓名： | 孙洪利 刘元雪 叶四桥 冉仕平 |
| 作者单位： | 1. 中交第一公路勘察设计研究院有限公司,陕西西安,710075 2. 后勤工程学院建筑工程学院,重庆,400041 3. 重庆交通大学河海学院,重庆,400074 4. 西藏自治区发展和改革委员会,西藏拉萨,820000 |
| 摘 要： | 出于减小高切坡超前支护桩桩身荷载、优化超前支护桩设计的目的,提出在超前支护桩后设置聚苯乙烯泡沫(EPS)垫层.运用数值模拟方法,进行了超前支护桩后设置不同厚度、不同类型的EPS垫层情形下的敏感性分析.结果表明:设置EPS垫层后,桩身所受土压力、最大弯矩、最大剪力及桩顶位移均显著减小,在0～0.8 m垫层厚度范围内,随着... |
| 关 键 词： | 超前支护桩 EPS垫层 数值模拟 |
EPS Cushion of Forepoling Pile and Its Optimization by Numerical Simulation |
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| SUN Hong-li,LIU Yuan-xue,YE Si-qiao,RAN Shi-ping. EPS Cushion of Forepoling Pile and Its Optimization by Numerical Simulation[J]. Journal of Chongqing Jiaotong University, 2011, 30(4): 786-789,879. DOI: 10.3969/j.issn.1674-0696.2011.04.019 | |
| Authors: | SUN Hong-li LIU Yuan-xue YE Si-qiao RAN Shi-ping |
| Affiliation: | 1.Survey and Design of Highways into First Institute Co.,Ltd.,Xi’an 710075,Shaanxi,China; 2.Construction Engineering Institute of Logistics Engineering University,Chongqing 400041,China; 3.School of River & Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China; 4.Tibet Autonomous Region Development and Reform Commission,Lhasa 820000,Tibet,China) |
| Abstract: | Aiming at reducing the loads on forepoling piles and optimizing its design,a polystyrene foam(EPS) cushion was proposed to set up behind the forepoling pile.The sensitivity analysis was implemented under the conditions of different cushion thickness,different types of EPS by numerical simulation.The research results show that: After setting EPS cushion,the soil pressure,maximum moment and maximum shear force on forepoling pile and pile top displacement are significantly reduced.And in the range 0-0.8m cushion,the thicker the cushion is,the more significant the reduction is.For example,the earth pressure on forepoling pile decreases by 20% to 45%.For different types of EPS materials,the load effect on pile decreases with EPS material density decreasing. |
| Keywords: | forepoling pile EPS cushion numerical simulation |
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