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为探究基坑抗隆起稳定性各影响因素敏感程度的大小,在深入研究基坑抗隆起稳定性影响因素敏感性分析方法的基础上,提出采用正交试验和灰色关联分析相结合的方法对基坑抗隆起稳定性影响因素进行敏感性分析。结合福建地区某基坑工程实例,通过有限元强度折减计算,对影响坑底抗隆起稳定性的6个主要影响因素敏感性大小进行研究。结果表明,内摩擦角是影响基坑抗隆起稳定性的主要敏感因素,黏聚力和支挡墙插入比敏感性次之,土体重度、地面超载敏感性较小,最下道内支撑距坑底距离的影响最小。正交试验和灰色关联分析相结合可以在充分考虑各影响因素相互作用的基础上,通过定量分析清楚地确定各因素之间的主次关系,达到对研究对象各影响因素整体评价的目的。
Abstract：In order to study the extent of each factor on the anti uplift stability of the foundation pit,based on the further research on the sensitivity analysis method of the influencing factors of the anti uplift stability of the foundation pit,the article puts forward the method that combines orthogonal test and gray correlation analysis to analyze the sensitivity of the factors affecting the anti uplift stability of the foundation pit.In combination of the example of a foundation pit project in Fujian area,through the calculation of the strength reduction of the finite element,the sensitivity of the six main influencing factors that affect the anti uplift stability of the pit is studied.The results show that the internal friction angle is the main sensitive factor that affects the anti uplift stability of the foundation pit,followed by the cohesion and the insertion ratio of the retaining wall.The sensitivity of the soil weight and ground overload is small.The effect of the distance from the lowest support to the pit is minimal.The combination of orthogonal test and gray correlation analysis can clearly determine the closeness in relationship between various factors through quantitative analysis on the basis of fully considering the interaction of various influencing factors,so as to achieve the overall evaluation of the influencing factors of the research object.
[1]王洪新，陈建军，刘冀山．基坑抗隆起稳定安全系数实用计算分析与应用[J]．岩石力学与工程学报，2007,26(S1):3223-3230.WANG Hongxin,CHEN Jianjun,LIU Jishan.Practical calculation analysis and application of safety factor of heave-resistant stability of foundation pit[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(S1):3223-3230.
[2] FAHEEMA H,CAI F,UGAIA K.Three-dimensional base stability of rectangular excavations in soft soils using FEM[J].Computers and Geotechnics,2004,31(2):67-74.
[3]谈亦帆，言建标，熊伟，等．基坑底部土体满堂加固模型试验与数值模拟研究[J]．土木与环境工程学报，2020,42(2):56-64.TAN Yifan,YAN Jianbiao,XIONG Wei,et al.Model test and numerical simulation study of reinforcement of entire basal soil in the bottom of foundation pit[J].Journal of Civil and Environmental Engineering,2020,42(2):56-64.
[4]康志军，谭勇，邓刚，等．被动区土体加固对深基坑变形影响的研究[J]．长江科学院院报，2017,34(6):119-123.KANG Zhijun,TAN Yong,DENG Gang,et al.Impact of soil reinforcement in passive zone on the deformation behaviors of deep excavation[J].Journal of Yangtze River Scientific Research Institute,2017,34(6):119-123.
[5]袁宗浩，严昱翔，陈娟，等．考虑偏压作用的基坑抗隆起稳定性上限分析[J]．水利水电技术，2020(2):1-7.YUAN Zonghao,YAN Yuxiang,CHEN Juan,et al.Upper bound method for basal heave stability analysis of braced excavations considering surcharge loading effect[J].Water Resources and Hydropower Engineering,2020(2):1-7.
[6]俞建霖，龙岩，夏霄，等．狭长型基坑工程坑底抗隆起稳定性分析[J]．浙江大学学报（工学版），2017,51(11):2165-2174.YU Jianlin,LONG Yan,XIA Xiao,et al.Basal stability for narrow foundation pit[J].Journal of Zhejiang University(Engineering Science),2017,51(11):2165-2174.
[7]王洪新，沈旭凯．考虑支撑作用的基坑抗隆起稳定安全系数计算方法[J]．岩土力学，2020,41(5):1680-1689.WANG Hongxin,SHEN Xukai,Heave-resistant stability analysis method of foundation pit considering the support[J].Rock and Soil Mechanics,2020,41(5):1680-1689.
[8] SLOAN S W,KLEEMAN P W.Upper bound limit analysis using discoutinuous velocity fields[J].International Journal for Numerical Methods in Engineering,1995,12(7):1-4.
[9]孔德森，门燕青．基坑坑底抗隆起稳定性影响因素分析[J]．地下空间与工程学报，2014,10(4):979-984.KONG Desen,MEN Yanqing.Analysis on influencing factors of basal stability in deep foundation[J].Chinese Journal of Underground Space and Engineering,2014,10(4):979-984.
[10]应宏伟，王小刚，张金红．考虑基坑宽度影响的基坑抗隆起稳定分析[J]．工程力学，2018,35(5):118-124.YING Hongwei,WANG Xiaogang,ZHANG Jinhong.Analysis on heave-resistant stability considering the effect of excavation width[J].Engineering Mechanics,2018,35(5):118-124.
[11] SMITH I M,HOBBS R.Finite element analysis of centrifuged and built-up slopes[J].Geotechnique,1974,24(4):531-559.
[12] TAYLOR D W.Stability of earth slopes[J].J Boston Soc Civ Eng,1937,24:197-246.
[13] GOH A T C.Assessment of basal stability for braced excavation systems using the finite element method[J].Computers and Geotechnics,1990,10(4):325-338.
[14] CUI J,ZENG B.Study on parameters characteristics of NGM(1,1,k)prediction model with multiplication transformation[J].Grey Systems Theory and Application,2012,2(1):24-35.
[15] FAHEEM H,CAI F,UGAI K,et al.Two-dimensional base stability of excavations in soft soils using FEM[J].Computers and Geotechnics,2003,30(2):141-163.
[16]王成华，李亚杰．基坑隆起稳定性数值分析中的若干问题[J]．岩土工程学报，2017,39(S2):41-44.WANG Chenghua,LI Yajie.Some problems in numerical analyses of basal upheaval stability of foundation pits[J].Chinese Journal of Geotechnical Engineering,2017,39(S2):41-44.
[17]胡安峰，陈博浪，应宏伟．土体本构模型对强度折减法分析基坑整体稳定性的影响[J]．岩土力学，2011,32(S2):592-597.HU Anfeng,CHEN Bolang,YING Hongwei.Influences of constitutive models on overall stability analysis of deep excavations using strength reduction method[J].Engineering Mechanics,2011,32(S2):592-597.
[18] JGJ 120—2012，建筑基坑支护技术规程[S]．北京：中国建筑工业出版社，2012.JGJ 120—2012,Technical specifications for building foundation pit support[S].Beijing:China Construction Industry Press,2012.
[19]王洪新．对基坑抗隆起稳定安全系数的改进[J]．岩土力学，2014,35(S2):30-36.WANG Hongxin.Improvement on safety coefficient of heave-resistant stability of excavations[J].Engineering Mechanics,2014,35(S2):30-36.
基本信息:
中图分类号:TU473
引用信息:
[1]王燕,蒋国平,张飞,等.基于正交试验的基坑抗隆起稳定性影响因素灰色关联分析[J].青岛理工大学学报,2021,42(02):78-85.
基金信息:
国家自然科学基金资助项目（41772297）; 福建省教育厅中青年教师教育科研项目（JAT200369;JAT200374）; 福建江夏学院校级科研项目（JXZ2020006）
2021-04-30
2021-04-30