基于最小势能原理的加筋垫层与路堤桩土相互作用研究

上官士青; 杨敏; 陈飞; 郭俊东; 张俊峰

doi:10.11779/CJGE201507012

基于最小势能原理的加筋垫层与路堤桩土相互作用研究 English Version

1. 同济大学地下建筑与工程系,上海 200092; 2. 华东电力设计院,上海 200063; 3. 同济启明星科技发展有限公司,上海 200092

基金项目: 国家自然科学基金项目（41372274）

详细信息

作者简介:
上官士青(1989- ),山东临沂人,博士研究生,从事水平受力桩研究。E-mail: shangguansq@gmail.com。

计量
- 文章访问数: 286
- HTML全文浏览量: 2
- PDF下载量: 271
出版历程
- 收稿日期: 2014-06-30
- 发布日期: 2015-07-19

Interaction of reinforced cushion and pile-soil system in embankments based on principle of minimum potential energy

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. East China Electric Power Design Institute, Shanghai 200063, China; 3. Tongji Qimstar Science and Technology Development Co., Ltd., Shanghai 200092, China

摘要

摘要: 桩承式加筋路堤由于涉及桩-桩间土-垫层-加筋体的相互作用问题而使其承载机理复杂,适用于分层土的简化计算方法尚需要深入研究。在广义桩-广义土物理模型的基础上引入加筋垫层,考虑桩土荷载传递及加筋体拉伸产生的弹性势能,推导了整个系统的总势能方程,并将其离散化,建立了一个无约束非线性数学规划模型。该数学模型以总势能方程作为目标函数,采用下降迭代算法求解总势能方程的最小值,可求得桩、土、垫层垂直方向上的变形。通过一个未加筋的算例对数学规划模型进行了验证,并结合某堆煤筒仓实际工程对该方法计算的加筋处理效果进行了讨论。
- 桩承式路堤 /
- 加筋垫层 /
- 数学规划 /
- 荷载传递法 /
- 桩土相互作用
Abstract: The bearing mechanism of piled embankments is complex as it involves the interaction of piles, soil columns, sand cushions and reinforced geogrids, and its simplified calculation method for layered soils still lacks researches. A mathematical model is proposed for a generalized pile-soil model with geogrids. Considering the potential energy generated by pile-soil load transfer and geotextile tensile, the potential energy equations for the whole system are derived and discreted. An unconstrained nonlinear mathematical optimization model is established, with the potential energy equation as an objective function. The minimum value of the total potential energy equation is obtained by a descent iterative algorithm, and in this way the deformations of piles, soils and sand cushions in the vertical direction are solved. The mathematical model for piled embankment and the solving method are validated through an example without geogrid. The effect of the geogrid interaction is discussed in another engineering example.
- piled embankment /
- reinforced cushion /
- mathematical programming /
- load transfer method /
- pile-soil interaction

HTML全文

参考文献(13)

[1]	ALAMGIR M, MIURA N, POOROOSHASB H B, et al. Deformation analysis of soft ground reinforced by columnar inclusions[J]. Computers and Geotechnics, 1996, 18(4): 267-290.
[2]	杨涛. 路堤荷载下柔性悬桩复合地基的沉降分析[J]. 岩土工程学报, 2000, 22(6): 741-743. (YANG Tao. Settlement analysis of composite ground improved by flexible floating piles under road embankment[J]. Chinese Journal of Geotechnical Engineering, 2000, 22(6): 741-743. (in Chinese))
[3]	李海芳. 路堤荷载下复合地基沉降计算方法研究[D]. 杭州: 浙江大学, 2004. (LI Hai-fang. Study of settlement computation method of composite foundation under embankment[D]. Hangzhou: Zhejiang University, 2004. (in Chinese))
[4]	沈伟, 池跃君, 宋二祥. 考虑桩、土、垫层协同作用的刚性桩复合地基沉降计算方法[J]. 工程力学, 2003, 20(2): 36-42. (SHEN Wei, CHI Yue-jun, SONG Er-xiang. Settlement calculation of composite ground with rigid piles including pile-soil-cushion interaction[J]. Engineering Mechanics, 2003, 20(2): 36-42. (in Chinese))
[5]	傅景辉, 宋二祥. 刚性桩复合地基工作特性分析[J]. 岩土力学, 2000, 21(4): 335-339. (FU Jing-hui, SONG Er-xiang. Analysis of rigid pile composite foundation's working performance [J]. Geotechnical Mechanic, 2000, 21(4): 335-339. (in Chinese))
[6]	CHEN R P, CHEN Y M, HAN J, et al. A theoretical solution for pile-supported embankments on soft soils under one-dimensional compression[J]. Canadian Geotechnical Journal, 2008, 45(5): 611-623.
[7]	陈仁朋, 许峰, 陈云敏, 等. 软土地基上刚性桩一路堤共同作用分析[J]. 中国公路学报, 2005, 18(3): 7-13. (CHEN Ren-peng, XU Feng, CHEN Yun-min, et al. Analysis of interaction between rigid pile and embankments[J]. China Journal of Highway and Transport, 2005, 18(3): 7-13. (in Chinese))
[8]	刘吉福. 路堤下复合地基桩、土应力比分析[J]. 岩石力学与工程学报, 2003, 22(4): 674-677. (LIU Ji-fu. Analysis on pile-soil stress ratio for composite ground under embankment[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(4): 674-677. (in Chinese))
[9]	楼晓明, 孙晓锋, 陈广. 大面积路堤荷载下带桩帽桩的荷载传递分析[J]. 土木工程学报, 2009, 42(2): 98-104. (LOU Xiao-ming, SUN Xiao-feng, CHEN Guang. Analysis on load transfer for caped pile under large area embankment[J]. China Civil Engineering Journal, 2009, 42(2): 98-104. (in Chinese))
[10]	徐立新. 桩承式路堤的工作机理研究[D]. 杭州: 浙江大学, 2007. (XU Li-xin. Study on design and computation method of geosynthetic reinforced pile-supported embankment[D]. Hangzhou: Zhejiang University, 2007. (in Chinese))
[11]	马强, 郑俊杰, 张军. 考虑桩间土支撑的桩承式加筋路堤理论分析[J]. 华中科技大学学报 (自然科学版), 2011, 39(3): 30-33. (MA Qiang, ZHENG Jun-jie, ZHANG Jun. Theoretical analysis of GRPS embankment with the consideration of the supporting effect of the soil between piles[J]. Journal of Huazhong University of Science and Technology (Natural science edition), 2011, 39(3): 30-33. (in Chinese))
[12]	许峰. 桩承式路堤的工作机理研究[D]. 杭州: 浙江大学, 2004. (XU Feng. On the mechanism of piled embankment[D]. Hangzhou: Zhejiang University, 2004. (in Chinese))
[13]	American Petroleum Institute. Recommended practice for planning, designing and constructing fixed offshore platforms-working stress design[M]. Washington D C: API Publishing Services, 2000.

施引文献

资源附件(0)

计量

文章访问数: 286
HTML全文浏览量: 2
PDF下载量: 271
被引次数: 0

基于最小势能原理的加筋垫层与路堤桩土相互作用研究 English Version

作者简介: 上官士青(1989- ),山东临沂人,博士研究生,从事水平受力桩研究。E-mail: shangguansq@gmail.com。

计量

出版历程

Interaction of reinforced cushion and pile-soil system in embankments based on principle of minimum potential energy

计量

出版历程

目录

作者简介:
上官士青(1989- ),山东临沂人,博士研究生,从事水平受力桩研究。E-mail: shangguansq@gmail.com。