穿越软土层嵌岩桩筏基础沉降特征与计算方法

胡敏云; 陆雨珂; 陈小雨; 张庆山; 徐晓兵; 张勇

doi:10.11779/CJGE2019S2056

穿越软土层嵌岩桩筏基础沉降特征与计算方法 English Version

1. 浙江工业大学岩土工程研究所,浙江杭州 310014;
2. 浙江工业大学工程设计集团有限公司,浙江杭州 310014

基金项目: 国家自然科学基金项目（51878616）

详细信息

作者简介:
胡敏云(1970— ),女,教授,主要从事土力学与环境岩土工程方面的科研与教学工作。E-mail: huminyun@zjut.edu.cn。

通讯作者:
张勇，E-mail：zhangyong@zjut.edu.cn

计量
- 文章访问数: 222
- HTML全文浏览量: 12
- PDF下载量: 111
出版历程
- 收稿日期: 2019-04-29
- 发布日期: 2019-07-19

Settlement of piled raft foundation embedded in rock and its calculation method

1. Institue of Geotechnical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;
2. Zhejiang University of Technology Engineering Design Group Co., Ltd., Hangzhou 310014, China

摘要

摘要: 结合某双塔高层建筑核心区桩筏基础和核心区外独立承台桩基础沉降变形监测资料,分析了嵌岩桩筏基础的沉降特征。结果表明,双塔核心区嵌岩桩筏基础沉降变形的整体性较好,沉降随施工加载过程增长较为稳定,而核心区外嵌岩桩基础的沉降对主楼施工和环境条件（如地下水）较为敏感,施工中出现了桩体上浮现象。根据桩顶荷载计算的嵌岩桩桩身压缩量与实测沉降相比,实测值远大于计算值。考虑嵌岩桩施工和桩筏基础工作特点,提出了穿越软土层的嵌岩桩筏基础沉降的两个主要影响因素：沉渣效应和桩侧负摩阻。在此基础上,提出了考虑沉渣和桩侧阻影响的桩筏基础沉降估算方法,并通过本工程及文献中的工程实测对提出公式的适用性进行了检验。
- 桩筏基础 /
- 软土 /
- 嵌岩桩 /
- 沉渣效应 /
- 桩侧负摩阻 /
- 沉降计算
Abstract: Based on the settlement monitoring data of two piled rafts under a twin-tower building,the settlement characteristics of piled raft foundation is examined. It is shown that the piled raft settles as a whole underloading, while the settlement of piles under individual plate, which is located outside the tower areas, is sensitive to changing of the adjacent loading and ground water level. By comparing the measurement with the calculated settlement, it is found that the measured settlements are much greater than the calculated values. Then, two influential factors are proposed, bottom sediment in pile and negative skin friction on pile, to revise the settlement calculation equation for piled raft foundation penetrating thick soft soil layers. Finally, the proposed method and the suggested parameters are checked through two real cases.
- piled raft foundation /
- soft soil /
- rock socketed pile /
- bottom sediment /
- negative skin friction /
- settlement calculation

HTML全文

参考文献(8)

[1]	LEE J H, PARK D J.Analysis of load sharing behavior for piled rafts using normalized load response model[J]. Computers and Geotechnics, 2014, 57(1): 65-74.
[2]	赵锡宏. 上海高层建筑桩筏与桩箱基础设计理论[M]. 上海: 同济大学出版社, 1989. (ZHAO Xi-hong.Shanghai high-rise building piled raft and piled box foundation design theory[M]. Shanghai: Tongji University Press, 1989. (in Chinese))
[3]	BASILE F.Non-linear analysis of vertically loaded piled rafts. Computers and Geotechnics, 2015, 63(2): 73-82.
[4]	TARIQ M, CHAUDHARY A.FEM modelling of a large piled raft for settlement control in weak rock[J]. Engineering Structures, 2007, 29(3): 2901-2907.
[5]	张忠苗. 浙江财富金融中心超长单桩与群桩实测沉降分析[J]. 岩石力学与工程学报, 2011, 30(增刊1): 3199-3207. (ZHANG Zhong-miao.Analysis of measured settlement of super-long piles and pile groups in Zhejiang Fortune Finance Center[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(S1): 3199-3207. (in Chinese))
[6]	刘金砺, 邱明兵. 单桩、单排桩、疏桩基础及其复合桩基的沉降计算[J]. 土木工程学报, 2007, 40(增刊): 152-158. (LIU Jin-li, QIU Ming-bing.Settlement calculation for pile foundation and composite piled foundation with single pile and sparse piles[J]. China Civil Engineering Journal, 2007, 40(S0): 152-158. (in Chinese))
[7]	Braja M Das.Principles of foundation engineering[M]. 8th ed. United States of America: Timothy L Anderson, 2016: 481-485.
[8]	钟闻华, 刘松玉, 张克恭. 群桩基础特性研究与实例分析[J]. 建筑结构, 2003, 33(11): 9-12. (ZHONG Wen-hua, LIU Song-yu, ZHANG Ke-gong.Characteristics of pile group foundation and case study[J]. Building Structure, 2003, 33(11): 9-12. (in Chinese))

施引文献(11)

期刊类型引用(5)

1.	熊金波，左小华，徐文彬. 凸型边坡露天境界外矿体开采稳定性研究. 现代矿业. 2022(05): 64-67+73 . 百度学术
2.	王余鹏. 露天弃碴场边坡失稳破坏与防治策略研究——以白鹤山隧道弃碴场为例. 长沙大学学报. 2021(02): 44-49 . 百度学术
3.	张嘉凡，高壮，程树范，张慧梅. 煤岩HJC模型参数确定及液态CO_2爆破特性研究. 岩石力学与工程学报. 2021(S1): 2633-2642 . 百度学术
4.	杨建华，代金豪，姚池，蒋水华，姜清辉. 岩石高边坡爆破开挖损伤区岩体力学参数弱化规律研究. 岩土工程学报. 2020(05): 968-975 . 本站查看
5.	王志，秦文静，张丽娟. 含裂隙岩石注浆加固后静动态力学性能试验研究. 岩石力学与工程学报. 2020(12): 2451-2459 . 百度学术