|Table of Contents|

Influence of Superstructure Stiffness on Pile Foundation Cap with Waterproof Slab(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年02期
Page:
39-47
Research Field:
Publishing date:

Info

Title:
Influence of Superstructure Stiffness on Pile Foundation Cap with Waterproof Slab
Author(s):
LIU Rong-gui1;  XI Yi-chao1;  LU Kai-ming2;  LU Shao-hui2
(1. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, Jiangsu, China; 2. Nanjing Construction Industry Group Co., Ltd., Nanjing 210012, Jiangsu, China)
Keywords:
coaction;  superstructure stiffness;  pile foundation;  cap;  waterproof slab;  layer-by-layer construction
PACS:
TU473
DOI:
-
Abstract:
Based on the elastic theory and the deformation compatibility relationship, the pile-soil stress estimation formula for pile foundation cap with waterproof slab was deduced. The coaction model of superstructure-pile foundation cap with waterproof slab, and the coaction model of only pile foundation cap with waterproof slab were established by ABAQUS. The influences of superstructure stiffness on the foundation reaction force, pile-top reaction force and internal force and deformation of foundation floor were compared and analyzed. The ratios of actual reaction force to design reaction force at different locations were calculated. The construction process was simulated by using the “life and death element” technology, and the variation law of load distribution ratio, differential settlement of unit load and bottom bending moment with construction story were studied. The results show that the load distribution is related to pile-soil stiffness ratio, hardness of bearing layer, column spacing and thickness of waterproof slab, etc. The bottom soil of waterproof slab can bear about 20% of the load of superstructure. After considering the superstructure stiffness, the distribution of bottom reaction is more uniform, the overhanging effect of waterproof slab is not obvious, and corner piles and side piles increase the load, while the middle piles unload,the differential settlement of bottom decreases significantly, and the maximum bending moment section of the cap changes from the side of wall to the middle of span. The loads of pile increase gradually,while the loads of bottom soil for waterproof slab and cap decrease gradually in layer-by-layer construction, and the trends of increasing or decreasing gradually slow down. The ability of the superstructure stiffness to restrain the differential settlement of foundation is limit, and the maximum bending moment of cap increases after considering layer-by-layer construction, the maximum bending moment of waterproof slab column decreases, and the bending moment of mid-span slab is always small and almost unchanged.

References:

References:
[1] 吴海胜,阚 明,张胜潭.高层建筑基础构造防水底板设计[J].建筑结构学报,2009,30(增1):233-236.
WU Hai-sheng,KAN Ming,ZHANG Sheng-tan.Constructional Design of Flashing in High-rise Building[J].Journal of Building Structures,2009,30(S1):233-236.
[2]姚舒康,杨 丽,李亚楠,等.深基础防水板应用探讨[J].工业建筑,2012,42(增):485-489.
YAO Shu-kang,YANG Li,LI Ya-nan,et al.Discussion on Application of Deep Foundation Waterproof Board[J].Industrial Construction,2012,42(S):485-489.
[3]杜 鹏.防水板受力分析及设计[J].建筑结构,2016,46(16):105-107.
DU Peng.Mechanical Analysis and Design of Waterproof Plate[J].Building Structure,2016,46(16):105-107.
[4]刘 武,李 娜,谭光宇,等.独立基础加防水板的设计[J].建筑结构,2016,46(增2):520-523.
LIU Wu,LI Na,TAN Guang-yu,et al.Design of the Independent Foundation with Water-proof Slab[J].Building Structure,2016,46(S2):520-523.
[5]李 纯,朱浮声.构造板独立基础地基反力测试[J].辽宁工程技术大学学报,2006,25(2):220-222.
LI Chun,ZHU Fu-sheng.Testing Spread Foundation with Concrete Slab[J].Journal of Liaoning Technical University,2006,25(2):220-222.
[6]吴春萍,白东丽.独立基础加防水板的地基反力分配分析[J].工程与建设,2008,22(3):371-373.
WU Chun-ping,BAI Dong-li.Analysis of Foundation Reaction Distribution of Independent Foundation with Waterproof Board[J].Engineering and Construction,2008,22(3):371-373.
[7]武崇福,任顺利.构造板独立基础地基反力的数值模拟[J].辽宁工程技术大学学报:自然科学版,2010,29(3):427-430.
WU Chong-fu,REN Shun-li.Numerical Simulation on Ground Back Pressure of Spread Foundation with Concrete Slab[J].Journal of Liaoning Technical University:Natural Science,2010,29(3):427-430.
[8]王小平.地基基础与上部结构的共同作用机理分析[D].西安:西安工业大学,2016.
WANG Xiao-ping.Common Mechanism of Action of Foundation and Superstructure Analysis[D].Xi'an:Xi'an Technological University,2016.
[9]SERT S,KILIC A N.Numerical Investigation of Different Superstructure Loading Type Effects in Mat Foundations[J].International Journal of Civil Engineering,2016,14(3):171-180.
[10]FAROUK H,FAROUK M.Soil,Foundation,and Superstructure Interaction for Plane Two-bay Frames[J].International Journal of Geomechanics,2016,16(1):B4014003.
[11]GB 50009—2012,建筑结构荷载规范[S].
GB 50009—2012,Load Code for the Design of Building Structures[S].
[12]JGJ 94—2008,建筑桩基技术规范[S].
JGJ 94—2008,Technical Code for Building Pile Foundations[S].
[13]张俊飞,顾克秋,付 帅.基于Abaqus的体壳单元组合建模研究[J].机械制造与自动化,2014(3):102-104,108.
ZHANG Jun-fei,GU Ke-qiu,FU Shuai.Study of Modelling on Combination of Solid and Thin-shell Elements Based on Abaqus[J].Machine Building & Automation,2014(3):102-104,108.
[14]刘 英,于立宏.Mohr-Coulomb屈服准则在岩土工程中的应用[J].世界地质,2010,29(4):633-639.
LIU Ying,YU Li-hong.Application of Mohr-Coulomb Yield Criterion in Geo-technical Engineering[J].Global Geology,2010,29(4):633-639.
[15]姚仰平,张丙印,朱俊高.土的基本特性、本构关系及数值模拟研究综述[J].土木工程学报,2012,45(3):127-150.
YAO Yang-ping,ZHANG Bing-yin,ZHU Jun-gao.Behaviors,Constitutive Models and Numerical Simulation of Soils[J].China Civil Engineering Journal,2012,45(3):127-150.
[16]费 康,张建伟.ABAQUS在岩土工程中的应用[M].北京:中国水利水电出版社,2013.
FEI Kang,ZHANG Jian-wei.Application of ABAQUS in Geotechnical Engineering[M].Beijing:China Water & Power Press,2013.
[17]王成华,占 川.土与结构界面力学特性研究综述[J].建筑技术,2013,44(6):486-490.
WANG Cheng-hua,ZHAN Chuan.State-of-the-art:Mechanical Properties of Interface Between Soils and Structures[J].Architecture Technology,2013,44(6):486-490.
[18]杨金尤,雷金波,邹永强,等.基于ABAQUS的带帽桩复合地基初始地应力平衡方法浅析[J].南昌航空大学学报:自然科学版,2017,31(4):73-78.
YANG Jin-you,LEI Jin-bo,ZOU Yong-qiang,et al.Preliminary Analysis on Initial Stress Balance Method of Composite Foundation with Cap Pile Based on ABAQUS[J].Journal of Nanchang Hangkong University:Natural Science,2017,31(4):73-78.

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Last Update: 2019-03-27