基于上、下部共同作用的柔性基础下复合地基解析解的研究

吕文志; 俞建霖; 郑伟; 龚晓南; 荆子菁

doi:10.13204/j.gyjz200904018

基于上、下部共同作用的柔性基础下复合地基解析解的研究

doi: 10.13204/j.gyjz200904018

1.
1. 浙江大学软弱土与环境土工教育部重点实验室,杭州 310058;
2.
2. 杭州市建筑设计研究院有限公司,杭州 310001

基金项目:

国家自然科学基金资助项目(50708093);东南大学混凝土及预应力混凝土结构教育部重点实验室资助项目(200608)

详细信息

作者简介:
吕文志，男，1975年3月出生，博士研究生，注册土术工程师(岩土)。E－mail:lwzl13871282176@163.com

计量
- 文章访问数: 93
- HTML全文浏览量: 2
- PDF下载量: 85
- 被引次数: 0
出版历程
- 收稿日期: 2008-10-29
- 刊出日期: 2009-04-20

STUDY OF ANALYTIC SOLUTION OF COMPOSITE GROUND UNDER FLEXIBLE FOUNDATION BASED ON SUPER-SUB STRUCTURE INTERACTION

1.
1. Key Laboratory of Soft Soils and Geoenvironmental Engineering,Ministry of Education(Zhejiang University),Hangzhou 310058,China;
2.
2. Hangzhou Architectural Design and Research Institute,Hangzhou 310001,China

摘要

摘要: 柔性基础下复合地基的受力及变形过程是柔性基础、垫层、复合地基以及桩端下卧层土体四者相互作用、应力和变形相互耦合的复杂过程。在分析柔性基础下复合地基的荷载传递机理的基础上；将柔性基础-垫层-复合地基-下卧层土体作为一个共同作用的整体，建立考虑上、下部共同作用的柔性基础下复合地基简化分析模型，考虑柔性基础、垫层、复合地基与下卧层土体之间应力、变形协调关系以及桩、土界面的相对滑移，推导出表征复合地基性状的沉降变形和桩土应力比的求解公式；最后通过与工程实测结果的对比分析，验证该方法的合理性和适用性。
- 复合地基 /
- 柔性基础 /
- 共同作用 /
- 解析解
Abstract: The behavior of the composite ground under a flexible foundation is a complicated problem,which includes the interaction and stress-strain coupling among the flexible foundation,the cushion,the composite ground and the underlying strata.The law of load transfer of composite ground under a flexible foundation is analyzed firstly.And then a simplified analytic model is presented,in which the flexible foundation-cushion-composite ground-underlying strata is considered as an interactive system.According to the compatibility of stress and deformation on the interfaces between these four components,and considering the relative movement between the pile and the soil,the formulas of settlement and stress ratio of pile to soil,which are used to characterize the behavior of the composite ground,are derived.Finally,the rationality and applicability of the analytic solution are proved by one engineering case.
- composite ground /
- flexible foundation /
- interaction /
- analytic solution

HTML全文

参考文献(16)

[2] 郑伟.柔性基础下复合地基荷载传递机理及变形特性研究[D].杭州:浙江大学,2006;

龚晓南.复合地基理论及工程应用[M].北京:中国建筑工业出版社,2002;

[3] 俞建霖,龚晓南,江璞.柔性基础下刚性桩复合地基的工作性状[J].中国公路学报,2007,20(4):1-6;

[4] 吴慧明,龚晓南.刚性基础与柔性基础下复合地基模型试验对比研究[J].土木工程学报,2001(5):81-83;

[5] 浙江大学.CFG桩复合地基加固桥头软基试验报告[R].杭州:浙江大学,2004;

[6] Alamgir M,Mjura N,Poorooshasb HB.Deformation Analysis of SoftGround Reinforced by Columnar Inclusions[J].Computers andGeotechnics,1996(4):267-290;

[7] 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(6):741-743;

[8] 邱钰,钱国超,刘松玉.粉喷桩处理高速公路软土地基附加应力及沉降计算分析[J].公路交通科技,2001,18(1):1-5;

[9] 施建勇,邹坚.深层搅拌桩复合地基沉降计算理论研究[J].岩土力学,2002,23(3):309-315;

[10] 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;

[11] 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;

[12] Hiroshi Miki1,Mitsuo Nozu.Design and Numerical Analysis of RoadEmbankment with LowImprovement Ratio Deep Mixing Method[C]∥Mishac K,Yegian E,Kavazanjiow E.Geotechnical Engineering forTransportation Projects.Proceedings of Geo-Trans 2004.Los Angeles,California,USA:ASCE,2004.1395-1402;

[13] 李海芳,温晓贵,龚晓南.路堤荷载下复合地基加固区压缩量的解析算法[J].土木工程学报,2005,38(3):77-80;

[14] Raithel M,Kirchner A,Schade C.Foundation of Constructions onVery Soft Soils with Geotexile Encased Columns-State of the Art[C].∥RSchaefer V,Bruce D A,J Byle M.Innovations in Grouting andSoil Improvement.Proceedings of Sessions of the Geo-Frontiers 2005Congress.Austin,Texas,USA:Grouting Committee and SoilImprovement Committee of Geo-Institute of ASCE,2005;

[15] 王春美.柔性桩复合地基加固区的压缩量计算[J].扬州大学学报(自然科学版),2007,10(4):66-70;

[16] 史佩栋.实用桩基工程手册[M].北京:中国建筑工业出版社,1999.

施引文献

资源附件(0)

访问统计