2024年 05期

Numerical Simulation of Soil Compaction Effect During Penetration Process of Jacked Piles in Layered Sandy Foundations


摘要(Abstract):

为了探讨静压桩贯入层状砂土地基引起的桩周土体分层效应,基于耦合欧拉-拉格朗日法,结合考虑颗粒破碎的砂土临界状态本构模型SIMSAND-Br模型,建立层状砂土地基中静压桩贯入过程挤土效应数值模型;基于已有的三轴排水剪切试验数据校正SIMSAND-Br模型参数,并用于模拟已有的离心机桩基贯入模型试验,通过对比模拟结果与已有的离心机桩基贯入模型试验数据,验证所建立模型的可靠性;采用验证后的所建立模型模拟分析层状砂土地基中静压桩贯入阻力和土体位移。结果表明:模拟计算的静压桩贯入阻力和土体位移结果与已有的离心机桩基贯入模型试验结果一致,所建立的模型可以用于层状砂土地基中静压桩贯入过程挤土效应的模拟分析;土体分层对于靠近土体分层界面一定范围内的静压桩贯入阻力和所引起的竖向位移具有较大影响,影响区域直径约为桩直径的4~10倍,对水平位移的影响极小,该影响区域大小随着砂土相对密实度和与分层界面距离的变化而显著变化。

关键词(KeyWords):桩基;挤土效应;耦合欧拉-拉格朗日法;层状砂土地基;数值模拟

基金项目(Foundation): 山东省自然科学基金项目(ZR2021QE186);; 交通运输部交通运输行业重点科技项目(2022-ZD4-047)

作者(Author): 王彤,高北,蔡汉竹,吴则祥,莫品强,扈萍,庄培芝

DOI: 10.13349/j.cnki.jdxbn.20240319.002

参考文献(References):

[1] 段新胜,顾湘.桩基工程[M].3版.武汉:中国地质大学出版社,1994.

[2] 龚晓南,李向红.静力压桩挤土效应中的若干力学问题[J].工程力学,2000,17(4):7.

[3] 朱建华,邬险峰.PHC管桩自引孔静压沉桩试验研究[J].浙江建筑,2008,25(3):25.

[4] 孙亚哲,高倚山,张建龙,等.PHC桩穿越深厚密实砂层可打性分析及现场试验研究[J].工程地质学报,2015,23(6):1079.

[5] 周航,孔纲强,刘汉龙.基于圆孔扩张理论的静压楔形桩沉桩挤土效应研究[J].中国公路学报,2014,27(4):24.

[6] 高子坤,施建勇.基于变分原理的静压沉桩挤土效应理论解答研究[J].岩土工程学报,2009,31(1):52.

[7] 鲁嘉,喻军,陈金祥,等.砂土中成桩工艺对桩基承载性能影响的室内模型试验研究[J].岩石力学与工程学报,2012,31(5):1055.

[8] 徐建平,周健,许朝阳,等.沉桩挤土效应的模型试验研究[J].岩土力学,2000,21(3):235.

[9] 吴则祥,金银富,季慧,等.易破碎砂土地基中“平底桩”贯入数值模拟分析[J].岩土力学,2017,38(增刊2):331-332.

[10] YANG Z X,GAO Y Y,JARDINE R J,et al.Large deformation finite-element simulation of displacement-pile installation experiments in sand[J].Journal of Geotechnical and Geoenvironmental Engineering,2020,146(6):04020044.

[11] 张明义.层状地基上静力压入桩的沉桩过程及承载力的试验研究[D].重庆:重庆大学,2001.

[12] 张述涛,李镜培,李雨浓.成层地基中静压桩挤土效应模型试验研究[J].地下空间与工程学报,2009,5(增刊2):1557.

[13] 杨苏春,张明义,王永洪,等.基于现场试验的闭口静压管桩贯入层状地基桩端阻力研究[J].岩土力学,2018,39(增刊2):91.

[14] 桑松魁,白晓宇,孔亮,等.层状黏性土中静压桩沉贯特性现场试验[J].岩石力学与工程学报,2022,41(10):2135.

[15] 鹿群,龚晓南,崔武文,等.饱和成层地基中静压单桩挤土效应的有限元模拟[J].岩土力学,2008,29(11):3017.

[16] SU D,WU Z,LEI G,et al.Numerical study on the installation effect of a jacked pile in sands on the pile vertical bearing capacities[J].Computers and Geotechnics,2022,145:104690.

[17] 寇海磊,张明义,张吉坤.层状粘性土及砂土地基中静力压桩连续贯入的数值模拟[J].工程力学,2012,29(12):175.

[18] 王力,王世梅.基于ALE方法的贯入桩周土大变形问题的研究[J].地下空间与工程学报,2013,9(3):530.

[19] QIU G,HENKE S,GRABE J.Application of a Coupled Eulerian-Lagrangian approach on geomechanical problems involving large deformations[J].Computers and Geotechnics,2011,38(1):30.

[20] 侯英伟,王建,曹东.基于CEL方法的混凝土板桩静压贯入减阻方法研究[J].中国农村水利水电,2020(6):154.

[21] YOST K M,YERRO A,GREEN R A,et al.MPM modeling of cone penetrometer testing for multiple thin-layer effects in complex soil stratigraphy[J].Journal of Geotechnical and Geoenvironmental Engineering,2022,148(2):04021189.

[22] LIU J W,DUAN N,CUI L,et al.DEM investigation of installation responses of jacked open-ended piles[J].Acta Geotechnica,2019,14(6):1805.

[23] 周健,邓益兵,叶建忠,等.砂土中静压桩沉桩过程试验研究与颗粒流模拟[J].岩土工程学报,2009,31(4):501.

[24] 王腾,薛浩,吴瑞.黏土中静压管桩土塞机制研究[J].岩土力学,2018,39(12):4335.

[25] OSTHOFF D,GRABE J.Deformational behaviour of steel sheet piles during jacking[J].Computers and Geotechnics,2018,101:1.

[26] 孟振.全螺纹灌注挤土桩施工影响与承载特性研究[D].上海:上海交通大学,2017.

[27] 魏丽敏,李双龙,杜猛,等.基于CEL法的静压管桩挤土效应数值分析[J].华南理工大学学报(自然科学版),2021,49(4):28.

[28] QIU G,GRABE J.Numerical investigation of bearing capacity due to spudcan penetration in sand overlying clay [J].Canadian Geotechnical Journal,2012,49(12):1393.

[29] 冯玉国.ABAQUS在岩土工程中的应用[M].北京:中国水利水电出版社,2013.

[30] 曹亚超.XCC桩贯入-固结全过程及承载力时间效应的数值模拟研究[D].重庆:重庆大学,2019.

[31] 王建华,兰斐.钻井船插桩对邻近桩影响的耦合欧拉-拉格朗日有限元方法研究[J].岩土力学,2016,37(4):1127.

[32] YANG Z,JARDINE R J,ZHU B,et al.Sand grain crushing and interface shearing during displacement pile installation in sand[J].Geotechnique,2010,60(6):469.

[33] HU W,YIN Z Y,DANO C,et al.A constitutive model for granular materials considering grain breakage[J].Science China Technological Sciences,2011,54:2188.

[34] YIN Z Y,HICHER P,DANO C,et al.Modeling mechanical behavior of very coarse granular materials[J].Journal of Engineering Mechanics,2016,143(1):C4016006.

[35] 尹振宇.粒状土力学本构理论及应用[M].北京:中国建筑工业出版社,2021:138-161.

[36] RICHARD F E,WOODS R E,HALL J R,Jr.Vibration of soils and foundations[M].Englewood Cliffs:Prentice Hall,1970.

[37] 王子珺,赵伯明.砂土统一本构模型研究及其三维数值实现[J].工程力学,2021,38(10):181.

[38] MO P Q.Centrifuge modelling and analytical solutions for the cone penetration test in layered soils[D].Nottingham:University of Nottingham,2014.

[39] LANZANO G,VISONE C,BILOTTA E,et al.Experimental assessment of the stress-strain behaviour of Leighton Buzzard sand for the calibration of a constitutive model[J].Geotechnical and Geological Engineering,2016,34(4):991.

[40] 吴则祥,陈佳莹,尹振宇.考虑砂土初始各向异性的单剪试验模拟分析[J].岩土工程学报,2021,43(6):1157.

[41] 王海刚,白晓宇,张明义,等.静压桩沉桩阻力现场试验与数值模拟分析[J].山东农业大学学报(自然科学版),2021,52(1):91.

[42] MO P Q,MARSHALL A M,YU H S.Interpretation of cone penetration test data in layered soils using cavity expansion analysis[J].Journal of Geotechnical and Geoenvironmental Engineering,2017,143(1):04016084.

[43] KHOSRAVI M,DE JONG J T,BOULANGER R W,et al.Centrifuge tests of cone-penetration test of layered soil[J].Journal of Geotechnical and Geoenvironmental Engineering,2022,148(4):642.

[44] WHITE D J,BOLTON M D.Displacement and strain paths during plane-strain model pile installation in sand[J].Géotechnique,2004,54(6):375.

[45] ARSHAD M I,TEHRANI F S,PREZZI M,et al.Experimental study of cone penetration in silica sand using digital image correlation[J].Géotechnique,2014,64(7):551.