基于FLAC~(3D)的土钉内力分析
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摘要
结合某基坑土钉支护实例,采用FLAC3D对土钉在开挖过程中的受力性能进行了模拟和分析。根据土钉支护结构的开挖、支护情况,研究了土钉的内力分布规律,得到了基坑在开挖过程中土钉的轴力、剪力变化规律。利用试验数据对模拟结果进行了验证,模拟结果与试测值基本吻合,研究成果近一步解释了钉土的相互作用机理。
In this paper,the authors analyze internal forces of a soil nail system during excavation using FLAC3D.Based on excavation and supporting conditions of soil nail structures,the internal force distribution patterns weredetermined.In addition,axial force and shear stress of the soil nail were evaluated.The experimental data matchwell with the computational results from FLAC3D,which allows one to gain a better understanding of interaction ofnails and soil.
In this paper,the authors analyze internal forces of a soil nail system during excavation using FLAC3D.Based on excavation and supporting conditions of soil nail structures,the internal force distribution patterns weredetermined.In addition,axial force and shear stress of the soil nail were evaluated.The experimental data matchwell with the computational results from FLAC3D,which allows one to gain a better understanding of interaction ofnails and soil.
引文
[1]佘诗刚译.土钉墙设计施工与监测手册[M].北京:中国科学技术出版社,2000.She Sh igang,translated.Handbook of design and construction andmon itoring in retain ing w ith soil nailings.Beijing:Ch ina Scienceand Technology Press,2000.
[2]曾宪民,黄久松,王作民,等.土钉支护设计与施工手册[M].北京:中国建筑工业出版社,2000.Ceng X ianm ing,Huang Jiusong,W ang Zuojiu,et al..Handbookof design and construction in retain ing w ith soil nailings.Beijing:Ch ina Arch itectural Industry Press,2002.
[3]余志成,施文华.深基坑支护设计与施工[M].北京:中国建筑工业出版社,2002.Yu Zh icheng,Sh i W enhua.The design and construction of deepfoundation p it support.Beijing:Ch ina Arch itectural Industry Press,2002.
[4]秦四清,等.深基坑工程优化设计[M].北京:地震出版社,1998.Q in S iq ing,et al..Optimal design of deep foundation p it engineer-ing.Beijing:Seism ic Press,1998.
[5]秦四清,王建党.土钉支护机理与优化设计[M].北京:地质出版社,1999.Q in S iq ing,W ang Jiandang.Boltingm echan ism and optimal designof soil nail.Beijing:Geological Pub lish ing House,1999.
[6]郑坚,龚晓南.土钉支护工作性能的现场监测[J].建筑技术,2004,35(5):337~339.Zheng Jian,Gong X iaonan.F ield mon itoring and analysis of theperformance of soil nail support work.Arch itecture Technology,2004,35(5):337~339.
[7]Juran.I.,et al..D esign of Soil Nail Retain ing Structures.Geotechn ical Special Pub lication No.25.ASCE,1990.
[8]张建龙,何家柱.基坑土钉支护结构受力及变形分析[J].工程勘察,2003,(2):39~41.Zhang Jian long,He Jiazhu.The analysis of force and deformationin foundation p itw ith soil nail support.Geotechn ical Investigation&Surveying,2003,(2):39~41.
[9]陈进杰,贾金青,张明聚.土钉支护工作性能参数分析[J].岩土工程学报,2001,23(5):618~622.Chen Jin jie,Jia Jinq ing,Zhang M ingju.Param etric stud ies on be-haviors of soil nail.Journal of Geotechn ical Engineering,2001,23(5):618~622.
[10]孙宗军,陈新华,庞吉莲,等.土钉支护中土钉与土作用机理数值分析[J].建筑技术,2004,35(5):344~345.Sun Zongjun,Chen X inhua,Pang Jilian et al.Num erical analysisof interacting m echan ism of nail soil in soil nail support.Arch i-tecture Technology,2004,35(5):344~345.
[11]杨立超.土钉支护及其FLAC数值模拟[J].建筑技术开发,2003,30(9):49~48.Yang L ichao.Soil nail wall and its num erical analysis.Bu ild ingTechn ique D evelopm ent,2003,30(9):49~48.
[12]Itasca Consu lting G roup Inc FLAC3D.users manual[R].USA:Itasca Consu lting G roup Inc.1997.
[13]万林海,余建民,冯翠红.软土复合土钉支护结构参数优化设计[J].岩石力学与工程学报,2004,24(19):3342~3347.W an L inhai,Yu Jianm in,Feng Cu ihong.Optimum design of pa-ram eters for composite soil nail wall in soft soil foundation.Ch i-nese Journal ofRockM echan ics and Engineering,2004,24(19):3342~3347.
[14]彭明祥.土钉支护设计参数的灵敏度分析[J].工程勘察,2003,(6):8~10.PengM ingxiang.Sensitivity analysis of param eters for design inretain ing w ith soil nailings.Geotechn ical Investigation&Survey-ing,2003,(6):8~10.
[15]王广国,杜明芳,侯学渊.深基坑的大变形分析[J].岩石力学与工程学报,2000,19(4):509~512.W ang Guangguo,Du M ingfang,Hou Xueyuan.Large deformationanalysis for braced excavation.Ch inese Journal of Rock M echan-ics and Engineering,2000,19(4):509~512.
[16]Jewell R.A.,Ped leyM.J..Soil nailing design:the role of ben-d ing stiffness.G round Engineering,1990.
[17]Jewell R.A.,Ped leyM.J..A Large scale experim ental study ofsoil reinforcem ent interaction,1990.
[18]Jewell R.A.,W roth C.P..D irect shear tests on reinforcem entsand[J].Geotechn ique,1987.
[19]李志刚,秦四清,张冰峰.土钉支护现场测试及三维数值模拟[J].工程地质学报,2004,12(1):69~73.L i Zh igang,Q in S iq ing,Zhang B ingfeng.In situ test and three-d im ensional simu lation analysis of soil nailing support.Journal ofEngineering Geology,2004,12(1):69~73.
[20]陈肇元,崔京浩.土钉支护在基坑工程中的应用(第二版)[M].北京:中国建筑工业出版社,2000.Chen Zhaoyuan,Cu i Jinghao.The application of soil nail infoundation p it.Beijing:Ch ina Arch itectural Industry Press,2000.
[21]娄国充,康中山,郭增强.土钉支护结构的施工监测与变形控制[J].工程地质学报,2004,12(3):323~327.Lou Guochong,Kang Zhongshan,Guo Zengq iang.Mon itoring thedeformation of the soil nail support structure and its control.Jour-nal of Engineering Geology,2004,12(3):323~327.
[22]杨双锁,康立勋.锚杆作用机理及不同锚固方式的力学特征[J].太原理工大学学报,2003,34(5):540~543.Yang Shuangsuo,Kang L ixun.Study on the principle of bolt ac-tion and the feature of variab le anchorage.Journal of Taiyuan U-n iversity of Technology,2003,34(5):540~543.
[23]李志刚,秦四清,张冰峰.土钉支护现场测试及三维数值模拟分析[J].工程地质学报,2004,12(1):69~73.LI Zh igang,Q in S iq ing,Zhang B ingfeng.In situ test and three-d im ensional simu lation analysis of soil nailing support.Journal ofEngineering Geology,2004,12(1):69~73.
[2]曾宪民,黄久松,王作民,等.土钉支护设计与施工手册[M].北京:中国建筑工业出版社,2000.Ceng X ianm ing,Huang Jiusong,W ang Zuojiu,et al..Handbookof design and construction in retain ing w ith soil nailings.Beijing:Ch ina Arch itectural Industry Press,2002.
[3]余志成,施文华.深基坑支护设计与施工[M].北京:中国建筑工业出版社,2002.Yu Zh icheng,Sh i W enhua.The design and construction of deepfoundation p it support.Beijing:Ch ina Arch itectural Industry Press,2002.
[4]秦四清,等.深基坑工程优化设计[M].北京:地震出版社,1998.Q in S iq ing,et al..Optimal design of deep foundation p it engineer-ing.Beijing:Seism ic Press,1998.
[5]秦四清,王建党.土钉支护机理与优化设计[M].北京:地质出版社,1999.Q in S iq ing,W ang Jiandang.Boltingm echan ism and optimal designof soil nail.Beijing:Geological Pub lish ing House,1999.
[6]郑坚,龚晓南.土钉支护工作性能的现场监测[J].建筑技术,2004,35(5):337~339.Zheng Jian,Gong X iaonan.F ield mon itoring and analysis of theperformance of soil nail support work.Arch itecture Technology,2004,35(5):337~339.
[7]Juran.I.,et al..D esign of Soil Nail Retain ing Structures.Geotechn ical Special Pub lication No.25.ASCE,1990.
[8]张建龙,何家柱.基坑土钉支护结构受力及变形分析[J].工程勘察,2003,(2):39~41.Zhang Jian long,He Jiazhu.The analysis of force and deformationin foundation p itw ith soil nail support.Geotechn ical Investigation&Surveying,2003,(2):39~41.
[9]陈进杰,贾金青,张明聚.土钉支护工作性能参数分析[J].岩土工程学报,2001,23(5):618~622.Chen Jin jie,Jia Jinq ing,Zhang M ingju.Param etric stud ies on be-haviors of soil nail.Journal of Geotechn ical Engineering,2001,23(5):618~622.
[10]孙宗军,陈新华,庞吉莲,等.土钉支护中土钉与土作用机理数值分析[J].建筑技术,2004,35(5):344~345.Sun Zongjun,Chen X inhua,Pang Jilian et al.Num erical analysisof interacting m echan ism of nail soil in soil nail support.Arch i-tecture Technology,2004,35(5):344~345.
[11]杨立超.土钉支护及其FLAC数值模拟[J].建筑技术开发,2003,30(9):49~48.Yang L ichao.Soil nail wall and its num erical analysis.Bu ild ingTechn ique D evelopm ent,2003,30(9):49~48.
[12]Itasca Consu lting G roup Inc FLAC3D.users manual[R].USA:Itasca Consu lting G roup Inc.1997.
[13]万林海,余建民,冯翠红.软土复合土钉支护结构参数优化设计[J].岩石力学与工程学报,2004,24(19):3342~3347.W an L inhai,Yu Jianm in,Feng Cu ihong.Optimum design of pa-ram eters for composite soil nail wall in soft soil foundation.Ch i-nese Journal ofRockM echan ics and Engineering,2004,24(19):3342~3347.
[14]彭明祥.土钉支护设计参数的灵敏度分析[J].工程勘察,2003,(6):8~10.PengM ingxiang.Sensitivity analysis of param eters for design inretain ing w ith soil nailings.Geotechn ical Investigation&Survey-ing,2003,(6):8~10.
[15]王广国,杜明芳,侯学渊.深基坑的大变形分析[J].岩石力学与工程学报,2000,19(4):509~512.W ang Guangguo,Du M ingfang,Hou Xueyuan.Large deformationanalysis for braced excavation.Ch inese Journal of Rock M echan-ics and Engineering,2000,19(4):509~512.
[16]Jewell R.A.,Ped leyM.J..Soil nailing design:the role of ben-d ing stiffness.G round Engineering,1990.
[17]Jewell R.A.,Ped leyM.J..A Large scale experim ental study ofsoil reinforcem ent interaction,1990.
[18]Jewell R.A.,W roth C.P..D irect shear tests on reinforcem entsand[J].Geotechn ique,1987.
[19]李志刚,秦四清,张冰峰.土钉支护现场测试及三维数值模拟[J].工程地质学报,2004,12(1):69~73.L i Zh igang,Q in S iq ing,Zhang B ingfeng.In situ test and three-d im ensional simu lation analysis of soil nailing support.Journal ofEngineering Geology,2004,12(1):69~73.
[20]陈肇元,崔京浩.土钉支护在基坑工程中的应用(第二版)[M].北京:中国建筑工业出版社,2000.Chen Zhaoyuan,Cu i Jinghao.The application of soil nail infoundation p it.Beijing:Ch ina Arch itectural Industry Press,2000.
[21]娄国充,康中山,郭增强.土钉支护结构的施工监测与变形控制[J].工程地质学报,2004,12(3):323~327.Lou Guochong,Kang Zhongshan,Guo Zengq iang.Mon itoring thedeformation of the soil nail support structure and its control.Jour-nal of Engineering Geology,2004,12(3):323~327.
[22]杨双锁,康立勋.锚杆作用机理及不同锚固方式的力学特征[J].太原理工大学学报,2003,34(5):540~543.Yang Shuangsuo,Kang L ixun.Study on the principle of bolt ac-tion and the feature of variab le anchorage.Journal of Taiyuan U-n iversity of Technology,2003,34(5):540~543.
[23]李志刚,秦四清,张冰峰.土钉支护现场测试及三维数值模拟分析[J].工程地质学报,2004,12(1):69~73.LI Zh igang,Q in S iq ing,Zhang B ingfeng.In situ test and three-d im ensional simu lation analysis of soil nailing support.Journal ofEngineering Geology,2004,12(1):69~73.
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