高级搜索
  • 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引（EI）收录期刊
  • Scopus数据库收录期刊

稳定路基中刚性桩抗弯能力验算简易方法

刘吉福, 郑刚, 安关峰

刘吉福, 郑刚, 安关峰. 稳定路基中刚性桩抗弯能力验算简易方法[J]. 岩土工程学报, 2013, 35(8): 1387-1396.
引用本文: 刘吉福, 郑刚, 安关峰. 稳定路基中刚性桩抗弯能力验算简易方法[J]. 岩土工程学报, 2013, 35(8): 1387-1396.
shu
LIU Ji-fu, ZHENG Gang, AN Guan-feng. Simple method for checking flexural capacity of rigid piles of stable embankment[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(8): 1387-1396.
Citation: LIU Ji-fu, ZHENG Gang, AN Guan-feng. Simple method for checking flexural capacity of rigid piles of stable embankment[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(8): 1387-1396.
shu

稳定路基中刚性桩抗弯能力验算简易方法  English Version

  • 1. 天津大学建筑工程学院，天津 300072; 2. 广州市市政集团有限公司，广东 广州 510060; 3. 中国铁建港航局集团有限公司， 广东 珠海 519070; 4. 中铁建港航局集团勘察设计院有限公司，广东 广州 511442

基金项目: 国家自然科学基金项目（51078263）
详细信息
    作者简介:

    刘吉福(1971- )，男，山东阳谷人，博士，教授级工程师，主要从事公路、港口与航道工程的勘察设计、科研等工作。E-mail: LJFMXY@163.com。

  • 中图分类号: TU473

Simple method for checking flexural capacity of rigid piles of stable embankment

  • 1. School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Guangzhou Municipal Group Co., Ltd., Guangzhou 510060, China; 3. CRCC Harbour ＆ Channel Engineering Group Co., Ltd., Zhuhai 519070, China; 4. CRCC Harbour ＆ Channel Engineering Group Survey ＆ Design Institute Co., Ltd., Guangzhou 511442, China

摘要

    摘要
  • 摘要: 稳定路基的刚性桩复合地基会产生一定的侧向位移，其刚性桩会承受一定的弯矩并可能开裂。为了保证刚性桩复合地基路基的长期稳定性，应验算路堤下复合地基刚性桩的抗弯能力。为减小路堤下复合地基刚性桩的抗弯能力验算难度，需要研究刚性桩弯矩简易计算方法。首先，基于大量公路路基软基试验和监测工程，对路基最大沉降与最大侧向位移的关系进行了统计研究，得到了两者之间的经验关系式；然后，根据路堤下复合地基和刚性桩的侧向位移曲线形状，提出刚性桩水平受力简化模型，并对复合地基刚性桩弯矩与最大侧向位移之间的关系进行了理论推导。在上述研究的基础上，提出了根据复合地基沉降得到桩身弯矩的简易方法。工程算例表明该方法简单、可行。研究表明，刚性桩位移与桩间土位移基本相等，可忽略不计桩土位移差对刚性桩弯矩的影响；当刚性桩进入硬土层的长度超过7倍桩径时，可认为刚性桩在软土层底面处固定。
    Abstract: Since rigid-pile composite ground of a stable embankment deforms laterally, the rigid piles in the composite ground bear bending moment and may be cracked. The flexural capacity of rigid piles should be checked for the long-term stability of the embankment treated by rigid-pile composite ground. To reduce the difficulty of checking the flexural capacity of rigid piles in the composite ground under the embankment, the studies on simple methods for calculation of the bending moment of rigid piles are needed. First of all, the relationship between the maximum settlement and the maximum lateral deformation of embankments is statistically studied based on experimental and monitoring data of many soft ground and embankment projects of highways, and an empirical equation for the maximum settlement and the maximum lateral deformation of embankments is obtained. Then a simplified model for lateral forces of rigid piles is proposed using the lateral deformation curves of composite ground and rigid piles under embankments, and the relationship between the bending moment and the maximum lateral deformation of rigid piles is derived. The bending moment of rigid piles is suggested to be calculated according to the maximum settlement of embankments. The proposed method is proven to be simple and reasonable by an actual project. It is shown that the lateral deformation of piles is nearly equal to that of the surrounding soils, and the difference of lateral deformation between the piles and the soils can be neglected. The rigid piles can be thought to be fixed at the lower surface of soft stratum if their fixed length in underlying hard stratum is 7 times larger than their diameter.
    • HTML全文
    • 参考文献(1)
  • [1] 朱旭华, 舒国明. 广珠北新围高架桥桥头路基滑移原因分析[J]. (中外公路), 2006, 26(4):27-29.(ZHU Xu-hua, SHU Guo-ming. Analysis of clause of slide of approach embankment of Xinwei viaduct of Guangzhou-Zhuhai North Expressway[J]. Journal of China & Foreign Highway, 2006, 26(4): 27-29. (in Chinese))
    连 峰. 桩网复合地基承载机理及设计方法[D]. 杭州: 浙江大学, 2009(4): 33-34.(LIAN Feng. Bearing mechanism and design method of pile-reinforced earth composite foundation[D]. Hangzhou: Zhejiang University, 2009(4): 33-34. (in Chinese))
    徐立新. 桩承式加筋路堤的设计计算方法研究[D]. 杭州:浙江大学, 2007: 104. (XU Li-xin. Study on design and computation method of geosynthetic reinforced pile- supported embankments[D]. Hangzhou: Zhenjiang University, 2007: 104. (in Chinese))
    鲁绪文. 路堤荷载下长短桩复合地基加固深厚软土路基的试验与研究[D]. 南京: 南京水利科学研究院, 2007: 33. (LU Xu-wen. Experiment and study of composite foundation with long-short piles to improve deep soft soil under embankment load[D]. Nanjing: Nanjing Hydraulic Research Institute, 2007: 33. (in Chinese))
    徐小庆, 刘吉福. 筒桩复合地基和CFG桩复合地基处理公路软基效果对比[J]. (水运工程), 2010(8): 129-132.(XU Xiao-qing, LIU Ji-fu. Comparison of performance of pipe pile composite ground and CFG pile composite ground under embankment of highway[J]. Port & Waterway Engineering, 2010(8): 129-132. (in Chinese))
    刘吉福, 郑 刚, 安关峰. 刚性桩复合地基路基绕流滑动稳定分析[J]. (工程勘察), 2013(6): 17-22.(LIU Ji-fu, ZHENG Gang, AN Guan-feng. Stability analysis of flow-slide of embankment on rigid-piles composite ground[J]. Geotechnical Investigation & Surveying, 2013(6): 17-22. (in Chinese))
    胡勇刚, 罗 强, 张 良, 等. 基于离心模型试验的水泥土搅拌法加固斜坡软弱土地基变形特性分析[J]. (岩土力学), 2010, 31(7): 2207-2213.(HU Yong-gang, LUO Qiang, ZHANG Liang,et al. Deformation characteristics analysis of slope soft soil foundation treatment with mixed-in-place pile by centrifugal model tests[J]. Rock and Soil Mechanics, 2010, 31(7): 2207-2213. (in Chinese))
    张师德, 阵绪禄. 软土地基上土工结构物的离心模拟试验[J]. (上海地质), 1988(4): 30-39.(ZHANG Shi-de, CHEN Xu-lu. Centrifuge tests for geotechnical construction on muddy clay foundation[J]. Shanghai Geology, 1988(4): 30-39. (in Chinese))
    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: 83-94. (GONG Xiao-nan. Theory and practice of composite foundation[M]. Beijing: China Architecture & Building Press, 2002: 83-94(in Chinese))
    郑 刚, 刘 力, 韩 杰. 刚性桩加固软弱地基上路堤的稳定性问题(Ⅱ)—存在问题及单桩条件下的分析[J]. (岩土工程学报), 2010, 32(11): 1648-1657.(ZHENG Gang, LIU Li, HAN Jie. Stability of embankment of soft subgrade reinforced by rigid inclusions(Ⅱ)—background and single pile analysis[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(11): 1648-1657. (in Chinese))
    郑 刚, 刘 力, 韩 杰. 刚性桩加固软弱地基上路堤的稳定性问题(Ⅱ)——群桩条件下的分析[J]. (岩土工程学报), 2010, 32(12): 1811-1820.(ZHENG Gang, LIU Li, HAN Jie. Stability of embankment of soft subgrade reinforced by rigid inclusions(Ⅱ)——group piles analysis[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(12): 1811-1820. (in Chinese))
    陈云敏, 贾 宁, 陈仁朋. 桩承式路堤土拱效应分析[J]. (中国公路学报), 2004, 17(4): 1-6.(CHEN Yun-min, JIA Ning, CHEN Ren-peng. Soil arch analysis of pile supported embankments[J]. China Journal of Highway and Transport, 2004, 17(4): 1-6. (in Chinese))
    杨龙才, 王炳龙, 赵国堂, 等. CFG桩网复合地基沉降计算方法研究[J]. (铁道建筑), 2009(7): 19-23.(YANG Long-cai, WANG Bing-long, ZHAO Guo-tang,et al. Study on calculation method of settlement of pile-net composite ground[J]. Railway Engineering, 2009(7): 19-23. (in Chinese))
    余 闯, 刘松玉, 杜广印. 桩承式路堤沉降简化计算方法及其应用[J]. (合肥工业大学学报(自然科学版)), 2009, 32(10): 1495-1497, 1509.(YU Chuang, LIU Song-yu, DU Guang-yin. Simplified method of settlement calculation and its application to piled embankments[J]. Journal of Hefei University of Technology[J], 2009, 32(10): 1495-1497, 1509. (in Chinese))
    林壮宏,李根存,林文强. 某高速公路填石路基滑塌分析及处理方案[M]// 高速公路地基处理理论与实践. 北京: 人民交通出版社, 2005: 559-566. (LIN Zhuang-hong,LI Gen-cun,LIN Wen-qiang. Slide clause analysis and treatment schemes of a expressway embankment with block stone[M]// Theory and Practice of Expressway Ground Improvement. Beijing: China Communication Press, 2005: 559-566(in Chinese))
    高长胜, 魏汝龙, 陈生水. 抗滑桩加固边坡变形破坏特性离心模型试验研究[J]. (岩土工程学报), 2010, 31(1): 145-148.(GAO Chang-sheng, WEI Ru-long, CHEN Sheng-shui. Centrifugal model tests on deformation of slopes reinforced with piles[J]. Chinese Journal of Geotechnical Engineering, 2010, 31(1): 145-148. (in Chinese))
    TAVENAS F, MIEUSSENS C, BOURGES F. Lateral displacements in clay foundations under embankments[J]. Canadian Geotechnical Journal, 1979, 16: 532-550.
    TAVENAS F, LEROUEIL S. The behavior of embankments on soft foundations[J].Canadian Geotechnical Journal, 1980, 17: 236-259.
    余 闯, 刘松玉. 路堤侧向变形性状及预测模型研究[J]. (岩土力学), 29(5): 1305-1309.(YU Chuang, LIU Song-yu. Study on the characteristic and prediction model for lateral deformations under embankments[J]. Rock and Soil Mechanics, 29(5): 1305-1309. (in Chinese))
    JGJ94—2008 建筑桩基技术规范[S]JGJ94—2008 建筑桩基技术规范[S]. 北京:中国建筑工业出版社, 2008: 63-64. (JGJ94—2008 Technical code for building pile foundations[S] (JGJ94—2008 Technical code for building pile foundations[S]. Beijing: China Architecture & Building Press, 2008: 63-64(in Chinese))
    陈 旻. CFG桩复合地基质量事故分析与加固设计[J]. (工程勘察), 2009(5): 26-30.(CHEN Min. Analysis on the quality accident of composite foundation with CFG piles and its strengthening design[J]. Geotechnical Investigation & Surveying, 2009(5): 26-30. (in Chinese))
    刘吉福. 沉管灌注桩断桩率减小措施试验研究[J]. 公路, 2012(6): 96-102.(LIU Ji-fu. Experiment about measures to deduce broken pile of sinking-pipe concrete piles[J]. Highway, 2012(6): 96-102. (in Chinese))
    • 相关文章
    • 施引文献
    • 资源附件(0)
计量
  • 文章访问数:  550
  • HTML全文浏览量:  2
  • PDF下载量:  360
  • 被引次数: 0
出版历程
  • 收稿日期:  2012-07-07
  • 发布日期:  2013-08-19

目录

摘要
HTML全文
    参考文献(1)
    相关文章
    施引文献
    资源附件(0)

    /

    返回文章
    返回
    版权所有 © 2010水利部交通部国家能源局南京水利科学研究院 苏ICP备05007122号-11公安联网备案号：32010602011255
    编辑部地址：南京市虎踞关34号《岩土工程学报》编辑部邮编：210024电话：025-85829534，85829556E-mail: ge@nhri.cn