软岩边坡锚索预应力定量损失规律研究
|
摘要
预应力锚索是各类永久性岩质边坡最有效的加固手段之一,但其预应力损失使锚索锚固效果难以保证。以一高速公路软岩边坡支护工程为依托,通过现场实测分析,得到锚索预应力的定量损失规律:锚索预应力损失分为瞬时损失和时程损失。前者可达到初始张拉荷载的8%左右;后者又可分为短期和长期损失,其中长期损失的损失量可达到锚索初始张拉荷载的15%左右,该过程约需50 d以上时间完成。分析所得结果为预应力锚索定量补偿张拉和超张拉提供了理论依据,可为同类软岩边坡支护工程提供有益参考。
Prestressed anchor-cable is one of the most effective means of permanent rock slope reinforcement;but it’s difficult to guarantee the anchoring effect due to the loss of prestress.This paper is based on some highway soft rock slope support engineering,by field measurement analysis,obtained the quantitative prestress loss law.Prestress loss can be divided into instantaneous loss and time loss.The former,caused by strand retraction,can reach about 8% of the initial tensile load.The latter can be divided into short-term and long-term losses,and can reach about 15% of the initial tensile load.The results not only provides theoretical basis for the prestressed anchor rope tensioning and quantitative compensation tensioning,but also provide useful reference for similar soft rock slope support project.
Prestressed anchor-cable is one of the most effective means of permanent rock slope reinforcement;but it’s difficult to guarantee the anchoring effect due to the loss of prestress.This paper is based on some highway soft rock slope support engineering,by field measurement analysis,obtained the quantitative prestress loss law.Prestress loss can be divided into instantaneous loss and time loss.The former,caused by strand retraction,can reach about 8% of the initial tensile load.The latter can be divided into short-term and long-term losses,and can reach about 15% of the initial tensile load.The results not only provides theoretical basis for the prestressed anchor rope tensioning and quantitative compensation tensioning,but also provide useful reference for similar soft rock slope support project.
引文
[1]苏学贵,李彦斌,孟秀生.锚索预应力损失影响因素分析[J].西安矿业学院学报,1999,19(增):87–90.(SU Xuegui,LIYanbin,MENGXiusheng.The factors of the prestress losses[J].Xi′an Mining Institute,1999,19(Supp.):87–90.(in Chinese))
[2]韩光,朱训国,王大国.锚索预应力损失的影响因素分析及补偿措施[J].辽宁工程技术大学学报,2008,27(2):176–179.(HANGuang,ZHU Xunguo,WANG Daguo.Prestress loss factors analysisand compensation measures[J].Liaoning Technical University Journal,2008,27(2):176–179.(in Chinese))
[3]陈安敏,顾金才.软岩加固中锚索张拉吨位随时间变化规律的模型试验研究[J].岩石力学与工程学报,2002,21(2):231–256.(CHEN Anmin,GU Jincai.Soft rock reinforcement anchor tensioningTonnage variation with time of model tests[J].Chinese Journal ofRock Mechanics and Engineering,2002,21(2):231–256.(in Chinese))
[4]高大水,曾勇.三峡永久船闸高边坡锚索预应力状态监测分析[J].岩石力学与工程学报,2001,20(5):653–656.(GAODashui,ZENGYong.Three Gorges permanent lock status prestress high slopemonitoring and analysis[J].Chinese Journal of Rock Mechanics andEngineering,2001,20(5):653–656.(in Chinese))
[5]宋维邦.三峡工程永久通航建筑物研究[M].武汉:湖北科学技术出版社,1997:653–656.(SONG Weibang.Research on the ThreeGorges Project permanent navigation structures[M].Wuhan:HubeiScience and Technology Press,1997:653–656.(in Chinese))
[6]黄福德,吕祖衍.预应力群锚高边坡增稳机理研究[M].北京:人民交通出版社,2000:211–215.(HUANGFude,LUZuyan.Prestressedanchor group mechanism of high slope stability augmentation[M].Beijing:People′s Communications Press,2000:211–215.(in Chinese))
[7]顾金才,明治清,沈俊,等.预应力锚索内锚固段受力特点现场试验研究[J].岩石力学与工程学报,1998,17(增):788–792.(GUJincai,MING Zhiqing,SHEN Jun,et al.The mechanical characteristics offield test in prestressed anchor rope[J].Chinese Journal of RockMechanics and Engineering,1998,17(Supp.):788–792.(in Chinese))
[8]倪晓慧,朱珍德,赵杰,等.岩石破裂全程数字化细观损伤力学试验研究[J].岩土力学,2009,30(11):3283–3290.(NI Xiaohui,ZHU Zhende,ZHAO Jie,et al.Rock burst full digital mesoscopicdamage mechanics study[J].Rock and Soil Mechanics,2009,30(11):3 283–3 290.(in Chinese))
[9]二滩水电开发公司.岩土工程安全监测手册[M].北京:中国水利水电出版社,1997:107–115.(Ertan Hydroelectric Development Corp.Handbook of geotechnical engineering safety monitoring[M].Beijing:China Water Power Press,1997:107–115.(in Chinese))
[10]阎莫明,徐祯祥,苏自约,等.岩土锚固技术手册[M].北京:人民交通出版社,2004:148–153.(YAN Moming,XU Zhenxiang,SU Ziyue,et al.Geotechnical anchorage technical manual[M].BeijingPeople′s Communications Press,2004:148–153.(in Chinese))
[11]水利部水利水电规划设计总院.预应力锚固技术[M].北京:中国水利水电出版社,2001:11–19.(Water Resources and HydropowerPlanning and Design.Prestressed anchor technology[M].Beijing:China Water Power Press,2001:11–19.(in Chinese))
[12]程良奎.岩土加固实用技术[M].北京:地震出版社,1994:40–43.(CHENG Liangkui.Rock reinforcement practical technology[M].Beijing:Seismological Press,1994:40–43.(in Chinese))
[13]丁秀丽,盛谦,韩军,等.预应力锚索锚固机理的数值模拟试验研究[J].岩石力学与工程学报,2002,21(7):980–988.(DINGXiuli,SHENG Qian,HAN Jun,et al.Prestressed anchoring mechanismstudy on numerical simulation[J].Chinese Journal of Rock Mechanics andEngineering,2002,21(7):980–988.(in Chinese))
[14]张发明,陈祖煜,刘宁,等.岩体与锚固体间黏结强度的确定[J].岩土力学,2001,22(4):470–473.(ZHANG Faming,CHEN Zuyu,LIU Ning,et al.Rock and anchoring body to determine the bondstrength[J].Rock and Soil Mechanics,2001,22(4):470–473.(inChinese))
[15]蔡伟.锚索预应力损失计算及防治措施[J].四川建筑,2005,25(2):41–42.(CAI Wei.Prestress loss calculation and control measures[J].Sichuan Building,2005,25(2):41–42.(in Chinese))
[16]何思明.基于弹塑性理论的修正分层总和法[J].岩土力学,2003,24(1):88–92.(HE Siming.Modified layer-summation based onelastoplastic theory[J].Rock and Soil Mechanics,2003,24(1):88–92.(in Chinese))
[17]陈沅江.岩石流变的本构模型及其智能辨识研究[博士学位论文][D].长沙:中南大学,2003.(CHEN Yuanjiang.Rheological constitutivemodel and its intelligent identification[Ph.D.Thesis][D].Changsha:Central South University,2003.(in Chinese))
[2]韩光,朱训国,王大国.锚索预应力损失的影响因素分析及补偿措施[J].辽宁工程技术大学学报,2008,27(2):176–179.(HANGuang,ZHU Xunguo,WANG Daguo.Prestress loss factors analysisand compensation measures[J].Liaoning Technical University Journal,2008,27(2):176–179.(in Chinese))
[3]陈安敏,顾金才.软岩加固中锚索张拉吨位随时间变化规律的模型试验研究[J].岩石力学与工程学报,2002,21(2):231–256.(CHEN Anmin,GU Jincai.Soft rock reinforcement anchor tensioningTonnage variation with time of model tests[J].Chinese Journal ofRock Mechanics and Engineering,2002,21(2):231–256.(in Chinese))
[4]高大水,曾勇.三峡永久船闸高边坡锚索预应力状态监测分析[J].岩石力学与工程学报,2001,20(5):653–656.(GAODashui,ZENGYong.Three Gorges permanent lock status prestress high slopemonitoring and analysis[J].Chinese Journal of Rock Mechanics andEngineering,2001,20(5):653–656.(in Chinese))
[5]宋维邦.三峡工程永久通航建筑物研究[M].武汉:湖北科学技术出版社,1997:653–656.(SONG Weibang.Research on the ThreeGorges Project permanent navigation structures[M].Wuhan:HubeiScience and Technology Press,1997:653–656.(in Chinese))
[6]黄福德,吕祖衍.预应力群锚高边坡增稳机理研究[M].北京:人民交通出版社,2000:211–215.(HUANGFude,LUZuyan.Prestressedanchor group mechanism of high slope stability augmentation[M].Beijing:People′s Communications Press,2000:211–215.(in Chinese))
[7]顾金才,明治清,沈俊,等.预应力锚索内锚固段受力特点现场试验研究[J].岩石力学与工程学报,1998,17(增):788–792.(GUJincai,MING Zhiqing,SHEN Jun,et al.The mechanical characteristics offield test in prestressed anchor rope[J].Chinese Journal of RockMechanics and Engineering,1998,17(Supp.):788–792.(in Chinese))
[8]倪晓慧,朱珍德,赵杰,等.岩石破裂全程数字化细观损伤力学试验研究[J].岩土力学,2009,30(11):3283–3290.(NI Xiaohui,ZHU Zhende,ZHAO Jie,et al.Rock burst full digital mesoscopicdamage mechanics study[J].Rock and Soil Mechanics,2009,30(11):3 283–3 290.(in Chinese))
[9]二滩水电开发公司.岩土工程安全监测手册[M].北京:中国水利水电出版社,1997:107–115.(Ertan Hydroelectric Development Corp.Handbook of geotechnical engineering safety monitoring[M].Beijing:China Water Power Press,1997:107–115.(in Chinese))
[10]阎莫明,徐祯祥,苏自约,等.岩土锚固技术手册[M].北京:人民交通出版社,2004:148–153.(YAN Moming,XU Zhenxiang,SU Ziyue,et al.Geotechnical anchorage technical manual[M].BeijingPeople′s Communications Press,2004:148–153.(in Chinese))
[11]水利部水利水电规划设计总院.预应力锚固技术[M].北京:中国水利水电出版社,2001:11–19.(Water Resources and HydropowerPlanning and Design.Prestressed anchor technology[M].Beijing:China Water Power Press,2001:11–19.(in Chinese))
[12]程良奎.岩土加固实用技术[M].北京:地震出版社,1994:40–43.(CHENG Liangkui.Rock reinforcement practical technology[M].Beijing:Seismological Press,1994:40–43.(in Chinese))
[13]丁秀丽,盛谦,韩军,等.预应力锚索锚固机理的数值模拟试验研究[J].岩石力学与工程学报,2002,21(7):980–988.(DINGXiuli,SHENG Qian,HAN Jun,et al.Prestressed anchoring mechanismstudy on numerical simulation[J].Chinese Journal of Rock Mechanics andEngineering,2002,21(7):980–988.(in Chinese))
[14]张发明,陈祖煜,刘宁,等.岩体与锚固体间黏结强度的确定[J].岩土力学,2001,22(4):470–473.(ZHANG Faming,CHEN Zuyu,LIU Ning,et al.Rock and anchoring body to determine the bondstrength[J].Rock and Soil Mechanics,2001,22(4):470–473.(inChinese))
[15]蔡伟.锚索预应力损失计算及防治措施[J].四川建筑,2005,25(2):41–42.(CAI Wei.Prestress loss calculation and control measures[J].Sichuan Building,2005,25(2):41–42.(in Chinese))
[16]何思明.基于弹塑性理论的修正分层总和法[J].岩土力学,2003,24(1):88–92.(HE Siming.Modified layer-summation based onelastoplastic theory[J].Rock and Soil Mechanics,2003,24(1):88–92.(in Chinese))
[17]陈沅江.岩石流变的本构模型及其智能辨识研究[博士学位论文][D].长沙:中南大学,2003.(CHEN Yuanjiang.Rheological constitutivemodel and its intelligent identification[Ph.D.Thesis][D].Changsha:Central South University,2003.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心