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

复合地基侧向开挖上覆荷载影响规律离心机试验研究

李连祥, 季相凯, 刘嘉典, 贾斌

李连祥, 季相凯, 刘嘉典, 贾斌. 复合地基侧向开挖上覆荷载影响规律离心机试验研究[J]. 岩土工程学报, 2019, 41(S1): 153-156. DOI: 10.11779/CJGE2019S1039
引用本文: 李连祥, 季相凯, 刘嘉典, 贾斌. 复合地基侧向开挖上覆荷载影响规律离心机试验研究[J]. 岩土工程学报, 2019, 41(S1): 153-156. DOI: 10.11779/CJGE2019S1039
shu
LI Lian-xiang, JI Xiang-kai, LIU Jia-dian, JIA Bin. Centrifugal model tests on lateral mechanical properties of composite foundation under different additional loads[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 153-156. DOI: 10.11779/CJGE2019S1039
Citation: LI Lian-xiang, JI Xiang-kai, LIU Jia-dian, JIA Bin. Centrifugal model tests on lateral mechanical properties of composite foundation under different additional loads[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 153-156. DOI: 10.11779/CJGE2019S1039
shu

复合地基侧向开挖上覆荷载影响规律离心机试验研究  English Version

  • 1. 山东大学基坑与深基础工程技术研究中心,山东 济南 250061;
    2. 山东大学土建与水利学院,山东 济南 250061

基金项目: 国家自然科学基金项目（51508310）; 山东省优秀中青年科学家科研基金项目（BS2013SF024）; 济南市科技计划项目（201201145）
详细信息
    作者简介:

    李连祥(1966—),男,河北人,博士,教授,硕导,从事岩土工程研究。E-mail:jk_doctor@163.com。

    通讯作者:

    季相凯，E-mail：jpaean@163.com

Centrifugal model tests on lateral mechanical properties of composite foundation under different additional loads

  • 1. Research Center of Foundation Pit and Deep Foundation Engineering, Shandong University, Jinan 250061, China;
    2. School of Civil and Hydraulic Engineering, Shandong University, Jinan 250061, China

摘要

    摘要
  • 摘要: 进行了三组临近复合地基开挖的离心机模型试验,对比分析了相同开挖工况、不同上覆荷载下的桩轴力、桩侧摩阻力、桩土应力比以及桩弯矩的变化规律。结果表明,当复合地基上覆荷载增加时：①桩轴力及其因开挖产生的增量明显增大,桩侧摩阻力数值增大,但方向不变;②桩土应力比及其增量明显增大,其变化趋势与桩轴力曲线一致;③各级开挖工况下的桩体弯矩也会相应增加,而且随着与基坑距离的增加,弯矩值逐渐变小,荷载的影响也逐渐降低;④随着复合地基上覆荷载的增加,高应力水平下的桩间土更容易受到临近基坑开挖的扰动,荷载更多地向刚性桩转移,桩轴力增加,同时伴随着更大的桩体弯矩,进而加快桩体的破坏趋势。研究成果可为既有复合地基临近基坑开挖支护设计提供参考。
    Abstract: Three centrifugal model tests are carried out, and the axial force of piles, side friction resistance, pile-soil stress ratio and moment of piles under different loads are compared. The test results show that when the additional loads on the composite foundation increase: (1) The axial force of piles and the increments caused by the excavation increase obviously, and the value of pile side friction increases under the same direction. (2) The pile-soil stress ratio and its increment obviously increase. (3) The bending moment of piles under the excavation conditions increases correspondingly, and the effect of the load is gradually reduced as the distance from the foundation pit increases. (4) With the heavier additional load, the soil between piles is more susceptible to the disturbance of the excavation, and the load is more transferred to the rigid pile, so the axial force of piles increases, with the larger bending moment of piles, the demolition tendency of the piles is accelerated. The conclusions can provide reference for the design of retaining structures adjacent to the existing composite foundation, and the lateral displacement of the composite foundation should be strictly controlled.
    • HTML全文
    • 参考文献(8)
  • [1] 李连祥, 张海平, 徐帮树, 等. 考虑CFG 复合地基对土体侧向加固作用的基坑支护结构优化[J]. 岩土工程学报, 2012, 34(增刊): 500-506.
    (LI Lian-xiang, ZHANG Hai-ping, XU Bang-shu.Optimization of excavation supporting structure considering lateral reinforcement effect of CFG composite foundation[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(S0): 500-506. (in Chinese))
    [2] 余旭, 邹燕. 基坑开挖对临近建筑物CFG桩复合地基的影响分析[J].安徽建筑大学学报, 2015, 23(5): 16-21.
    (YU Xu, ZOU Yan.Influence of adjacent CFG pile composite foundation due to excavation[J]. Journal of Anhui Jianzhu University, 2015, 23(5): 16-21. (in Chinese))
    [3] LIYANAPATHIRANA D S, NISHANTHAN R.Influence of deep excavation induced ground movements on adjacent piles[J]. Tunnelling and Underground Space Technology,2016, 52(2): 168-181.
    [4] 张景尧, 乔京生, 梁乐杰. 土体侧向位移对周边复合地基力学性状影响研究[J]. 土工基础, 2013, 27(3): 89-92.
    (ZHANG Jing-yao, QIAO Jing-sheng, LIANG Le-jie.Impact of the soil lateral displacement on the performanceof the adjacent composite ground[J]. Soil Engineering and Foundation, 2013, 27(3): 89-92. (in Chinese))
    [5] 李连祥, 符庆宏. 临近基坑开挖复合地基侧向力学性状离心试验研究[J]. 土木工程学报, 2017, 50(6): 85-94.
    (LI Lian-xiang, FU Qing-hong.Centrifugal test study on lateral mechanical properties of composite foundation adjacent to foundation pit excavation[J]. China Civil Engineering Journal, 2017, 50(6): 85-94. (in Chinese))
    [6] 李连祥, 黄佳佳, 符庆宏, 等. 不同置换率复合地基力学性状附加荷载影响规律离心试验研究[J]. 岩土力学, 2017, 38(增刊1): 131-139.
    (LI Lian-xiang, HUANG Jia-jia, FU Qing-hong, et al.A centrifugal test study on the influence of additional loads on mechanical properties of composite foundations with different displacement rates[J]. Rock and Soil Mechanics, 2017, 38(S1): 131-139. (in Chinese))
    [7] 李连祥, 黄佳佳, 成晓阳, 等. 刚性桩复合地基与临近基坑支护结构相互影响的离心模型试验[J]. 岩石力学与工程学报, 2017, 36(增刊2): 4142-4150.
    (LI Lian-xiang, HUANG Jia-jia, CHENG Xiao-yang, et al.Centrifugal model test of interaction between rigid pile composite foundation and adjacent foundation pit supporting structure[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(S2): 4142-4150. (in Chinese))
    [8] 赵明华, 贺炜, 曹文贵. 基桩负摩阻力计算方法初探[J].岩土力学, 2004, 25(9): 1442-1446.
    (ZHAO Ming-hua, HE Wei, CAO Wen-gui.Study on calculation method of friction of piles[J]. Rock and Soil Mechanics, 2004, 25(9): 1442-1446. (in Chinese))
    • 相关文章
    • 施引文献
    • 资源附件(0)
计量
  • 文章访问数: 
  • HTML全文浏览量:  0
  • PDF下载量: 
  • 被引次数: 0
出版历程
  • 收稿日期:  2019-04-28
  • 发布日期:  2019-07-14

目录

摘要
HTML全文
    参考文献(8)
    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