中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2011, Vol. 30 ›› Issue (4): 786-789.DOI: 10.3969/j.issn.1674-0696.2011.04.019

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超前支护桩桩后EPS垫层优化设置的数值模拟

孙洪利1,刘元雪2,叶四桥3,冉仕平4   

  1. 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
  • 收稿日期:2011-04-04 修回日期:2011-05-24 出版日期:2011-08-15 发布日期:2015-01-22
  • 作者简介:孙洪利(1969—),男,辽宁锦州人,高级工程师,主要从事公路工程方面的研究。E-mial:syc1994@sohu.com。

EPS Cushion of Forepoling Pile and Its Optimization by Numerical Simulation

SUN Hong-li1,LIU Yuan-xue2,YE Si-qiao3,RAN Shi-ping4   

  1. 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
  • Received:2011-04-04 Revised:2011-05-24 Online:2011-08-15 Published:2015-01-22

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,随着垫层厚度的增加减小幅度越大,其中桩身土压力减小幅度达20% ~ 45%; 对于不同类型的EPS 材料而 言,桩身荷载效应具有随着EPS 材料密度的减小而减小的规律。

关键词: 超前支护桩, EPS垫层, 数值模拟

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.

Key words: forepoling pile, EPS cushion, numerical simulation

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