预应力锚杆肋梁在深基坑支护中的应用
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摘要
本文系统介绍了预应力锚杆肋梁的受力特点,分析了预应力锚杆肋梁的受力机理,并应用于深基坑支护工程,采用有限元方法对预应力锚杆肋梁支护的基坑进行数值计算,得出纵横梁的弯矩及面层的位移,弥补了传统方法的不足,将计算结果与传统的锚桩支护方法进行对比,表明在护坡桩桩端无法嵌入的情况下,采用预应力锚杆肋梁支护是一种经济、可靠的方式。
In this paper authors characterized stress and loading mechanism of pre-stressed anchor-rod cross coupling in supporting deep foundation pit.Finite element method is used to simulate stress distribution in foundation pit supported by such beam.The moment of flexure of the beam and displacement of surface layer are also calculated,which overcomes disadvantage of traditional methods.By comparing simulated results with traditional anchor-pile supporting method the authors concluded that it is an economic and reliable way to apply pre-stressed anchor-rod cross coupling when the end of slope-protection pile can't be driven into the foundation.
In this paper authors characterized stress and loading mechanism of pre-stressed anchor-rod cross coupling in supporting deep foundation pit.Finite element method is used to simulate stress distribution in foundation pit supported by such beam.The moment of flexure of the beam and displacement of surface layer are also calculated,which overcomes disadvantage of traditional methods.By comparing simulated results with traditional anchor-pile supporting method the authors concluded that it is an economic and reliable way to apply pre-stressed anchor-rod cross coupling when the end of slope-protection pile can't be driven into the foundation.
引文
[1]秦四清,王林海.深基坑工程优化设计[M].北京:地震出版社,1998.Q in S iq ing,W ang L inhai et al.Option design of foundation p itproeict.BeiJing:seismological Press,1998.
[2]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.The m echan ic anf optional design ofsoil nail.BeiJing:Geoological Press,1999.
[3]秦四清.基坑支护设计的弹性抗力法[J].工程地质学报,2000,8(4):481~487.Q in S iq ing.The elastic resistance m ethod for design of foundationp it supporting.Journal ofEngineering Geology,2000,8(4):481~487.
[4]苏起,姜弘道,钱向东.三峡永久船闸衬砌墙分水平缝对结构及结构受力影响研究[J].工程地质学报,2001,9(3):267~271.Su chao,Jiang hongdao,Q ian xiangdong.Study on the effect of hor-izontal joints of permanent sh ip lovk lined wall on forcing of struc-ture and anchored bars at the three gorges project.2001,9(3):267~271.
[5]肖剑秋,卿笃干,赵海滨.锚杆网格梁在护坡中的作用与机理分析[J].岩石力学与工程学报,2002,21(B06):2218~2220.X iao Jianq iu,Q ing Dugan,Zhao Haib in.Analysis on function andm echan ism of bolt and ferroconcrete lattice used for reinforcem entof slope.Ch inese Journal of Rock M echan ics and Engineering,2002,21(B06):2218~2220.
[6]肖武权,冷伍明,律文田.某深基坑支护结构内力与变形研究[J].岩土力学,2002,25(8):1271~1274.X iaoW uquan,LenW um ing,LvW entian.Study on inner force anddeformation of supporting structure for deep foundation p it.Rockand SoilM echan ics,2002,25(8):1271~1274.
[7]C.Y.Lee.,T.S.Hu ll and H.G.Pou los.S implified p ile-slopestab ility analysys.Computer and Geotechn ics 1995,(17):1~16.
[8]贾海莉,王成华,李江洪.基于土拱效应的抗滑桩与护壁桩的桩间距分析[J].工程地质学报,2004,12(1):98~103.Jia Haili,W ang Chenghua,L i Jianghong.Analysis of p ile spacingbetween anti-slod ing p iles and petain ing p iles in accordance w ithsoil arch ing effect.Journal of Engineering Geology,2004,12(1):98~103.
[9]余闯,刘松玉,滕瑞振.不同加载方式下路堤沉降性状与预测模型研究[J].工程地质学报,2004,12(2):155~161.Yu Chuang,L iu Songyu,Teng Ru izhen.Characteristics of em-bankm ent settlem ent and its pred iction model under d ifferent load-ing sequence.Journal of Engineering Geology,2004,12(2):155~161.
[10]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-nailing support structure and its control.Journal of Engineering Geology,2004,12(3):323~327.
[2]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.The m echan ic anf optional design ofsoil nail.BeiJing:Geoological Press,1999.
[3]秦四清.基坑支护设计的弹性抗力法[J].工程地质学报,2000,8(4):481~487.Q in S iq ing.The elastic resistance m ethod for design of foundationp it supporting.Journal ofEngineering Geology,2000,8(4):481~487.
[4]苏起,姜弘道,钱向东.三峡永久船闸衬砌墙分水平缝对结构及结构受力影响研究[J].工程地质学报,2001,9(3):267~271.Su chao,Jiang hongdao,Q ian xiangdong.Study on the effect of hor-izontal joints of permanent sh ip lovk lined wall on forcing of struc-ture and anchored bars at the three gorges project.2001,9(3):267~271.
[5]肖剑秋,卿笃干,赵海滨.锚杆网格梁在护坡中的作用与机理分析[J].岩石力学与工程学报,2002,21(B06):2218~2220.X iao Jianq iu,Q ing Dugan,Zhao Haib in.Analysis on function andm echan ism of bolt and ferroconcrete lattice used for reinforcem entof slope.Ch inese Journal of Rock M echan ics and Engineering,2002,21(B06):2218~2220.
[6]肖武权,冷伍明,律文田.某深基坑支护结构内力与变形研究[J].岩土力学,2002,25(8):1271~1274.X iaoW uquan,LenW um ing,LvW entian.Study on inner force anddeformation of supporting structure for deep foundation p it.Rockand SoilM echan ics,2002,25(8):1271~1274.
[7]C.Y.Lee.,T.S.Hu ll and H.G.Pou los.S implified p ile-slopestab ility analysys.Computer and Geotechn ics 1995,(17):1~16.
[8]贾海莉,王成华,李江洪.基于土拱效应的抗滑桩与护壁桩的桩间距分析[J].工程地质学报,2004,12(1):98~103.Jia Haili,W ang Chenghua,L i Jianghong.Analysis of p ile spacingbetween anti-slod ing p iles and petain ing p iles in accordance w ithsoil arch ing effect.Journal of Engineering Geology,2004,12(1):98~103.
[9]余闯,刘松玉,滕瑞振.不同加载方式下路堤沉降性状与预测模型研究[J].工程地质学报,2004,12(2):155~161.Yu Chuang,L iu Songyu,Teng Ru izhen.Characteristics of em-bankm ent settlem ent and its pred iction model under d ifferent load-ing sequence.Journal of Engineering Geology,2004,12(2):155~161.
[10]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-nailing support structure and its control.Journal of Engineering Geology,2004,12(3):323~327.
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