大流量薄壁渡槽槽身张拉工艺仿真研究
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摘要
沙河渡槽工程是南水北调中线的主要控制性工程,渡槽槽身为预应力钢筋混凝土梁式结构,单跨30 m,槽身U型,直径8 m,槽身壁厚35 cm,共228榀槽。槽身纵向预应力钢绞线27束,采用两端同时施加预应力方式,环向预应力初步设计119束,张拉施工量大,按老的张拉方法,待张拉全部完成后再将槽身起吊、移动,占用预制台座的时间长,必将严重制约槽身预制的施工进度,进而会影响整个渡槽工程的完工时间。研究项目通过建立张拉仿真模型,对渡槽预应力钢绞线的张拉施工顺序产生的应力场进行仿真研究分析,优化了环向预应力筋布置,优选出合适的张拉次序,采用分级、分步张拉方式,减少张拉工艺占用台座的时间,将大量张拉工作量放在存槽台座上完成,提高了预制效率及预制进度。
Shahe aqueduct is the main controlling project of the Middle Route of South-to-North Water Diversion Project.The aqueduct is the structure of prestressed reinforced concrete beam with single span of 30 m,U-typed body,diameter of 8m,wall thickness of 35cm,and 225 pieces of aqueduct body.There are 27 longitudinal prestressed steel strands within the aqueduct body,and the pre-stress shall be applied together at both ends.The aqueduct body has 119 circumferential pretressed steel strands in the preliminary design,and the tension work is heavy.According to the traditional tension method,the aqueduct could only be lifted and moved after the tension,which will take more time on precast pedestal,severely restricts the precast progress,and also affects the total completion time of the aqueduct.The current research project has built a simulation model of tension to simulate and analyze the stress field caused by the tension of pretressed steel strand,to optimize the layout of circumferential prestressed reinforcement as well as the suitable tension order.The tension by grade and step by step could shorten the time on pedestal and make more tension work to be finished by burden pedestal,so that the precast efficiency and progress could be improved and sped up.
Shahe aqueduct is the main controlling project of the Middle Route of South-to-North Water Diversion Project.The aqueduct is the structure of prestressed reinforced concrete beam with single span of 30 m,U-typed body,diameter of 8m,wall thickness of 35cm,and 225 pieces of aqueduct body.There are 27 longitudinal prestressed steel strands within the aqueduct body,and the pre-stress shall be applied together at both ends.The aqueduct body has 119 circumferential pretressed steel strands in the preliminary design,and the tension work is heavy.According to the traditional tension method,the aqueduct could only be lifted and moved after the tension,which will take more time on precast pedestal,severely restricts the precast progress,and also affects the total completion time of the aqueduct.The current research project has built a simulation model of tension to simulate and analyze the stress field caused by the tension of pretressed steel strand,to optimize the layout of circumferential prestressed reinforcement as well as the suitable tension order.The tension by grade and step by step could shorten the time on pedestal and make more tension work to be finished by burden pedestal,so that the precast efficiency and progress could be improved and sped up.
引文
[1]南水北调中线沙河渡槽工程初步设计报告[R].河南省水利勘测设计研究有限公司,2009.(Preliminary Design Report forShahe Aqueduct of Middle Route Project of South-to-NorthWater Diversion[R].Henan Water&Power Engineering Con-sulting Co.,LTD,2009.(in Chinese))
[2]潘旦光,张国栋,李峥,等.超大型U型渡槽有限元分析[J].武汉水利电力大学(宜昌)学报,2000,(1).(PAN Dan-guang,ZHANG Guo-dong,LI Zheng,et al.Finite Element Analysis forSuper Large U-Shaped Aqueduct[J].Journal of Wuhan Univer-sity of Hydraulic and Electric Engineering/Yichang,2000,(1).(in Chinese))
[3]陈华兵.大型现浇预应力混凝土U形薄壳渡槽仿真模型试验研究[D].天津:天津大学,2007.(CHEN Hua-bing.Experi-mental Study of Si mulative Model on U-shaped and Thin-walled Prestressed Concrete Aqueduct[D].Tianjin:Tianjin U-niversity,2007.(in Chinese))
[4]孙勇.无黏结部分预应力混凝土叠合梁受力性能的研究[D].北京:中国农业大学,2005.(SUN-Yong.The Research on Flexur-al Behavior of Laminated Beams with Unbounded and PartlyPrestressed Concrete[D].Beijing:China Agriculrural Universi-ty,2005.(in Chinese))
[5]彭辉,雷进生.南水北调中线漕河渡槽结构地震动力特性研究[J].兵工学报,2010,(S1):91-95.(Study on Seismic DynamicCharacteristics of Aqueduct of Caoheinthe Middle of South-to-north Water Diversion Project[J].Acta Armamentarii,2010,(S1):91-95.(in Chinese))
[6]李险峰,张伟.樟洋渡槽预应力钢绞线安装与张拉[J].水利水电施工,2003,(S1).(LI Xian-feng,ZHANG Wei.Installationand Tension of Prestressed Steel Strand for Zhangyang Aque-duct[J].Water Conservancy and Hydropower Construction,2003,(Supp.).(in Chinese))
[7]DL/T 5144-2001,水工混凝土施工规范[S].(DL/T 5144-2001,Construction Standard for Hydraulic Concrete[S].(inChinese))
[8]JTJ 041-2000,公路桥涵施工技术规范[S].(JTJ 041-2000,Technical Code for Highway Bridge Construction[S].(in Chi-nese))
[9]马锋铃.漕河渡槽槽身混凝土配合比优化及性能试验[J].中国水利水电科学研究院学报,2007,5(2):110-113.(MA Feng-ling.Mixing Proportion Opti mization and Property Test of Cao-he Aqueduct Concrete[J].Journal of China Institute of WaterResources and Hydropower Research,2007,5(2):110-113.(inChinese))
[10]王玉华,张利,宋谦.南水北调中线沙河渡槽施工方案研究及优选[J].南水北调与水利科技,2011,9(3):13-16.(WANGYu-hua,ZHANG Li,SONG Qian.Research and Opti mizationof Shahe Aqueduct Construction Scheme in the Middle Routeof South-to-North Water Diversion Project[J].South-to-North Water Diversion and Water Science&Technology,2011,9(3):13-16.(in Chinese))
[11]SL/T191-96,水工混凝土结构设计规范[S].(SL/T 191-96,Design Code for Hydraulic Concrete Structures[S].(in Chi-nese))
[12]刘宪亮.矩形渡槽结构优化设计[J].华北水利水电学院学报,1998,(2):9-12.LI U Xian-liang.The Structural Opti mum De-sign of the Rectangular Flumes[J].Journal of North China In-stitute of Water Conservancy and Hydroelectric Power,1998,(2):9-12.(in Chinese))
[13]夏富洲,王长德,曹为民,等.大流量预应力渡槽设计和施工技术研究[J].南水北调与水利科技,2009,7(6):20-25.(XI AFu-zhou,WANG Chang-de,CAO Wei-min,et al.Research onConstruction Technology and Design for Prestressed ConcreteAqueduct with High Flow[J].South-to-North Water Diver-sion and Water Science&Technology,2009,7(6):20-25.(inChinese))
[14]李友明,刘乃生,林原.杭州湾跨海大桥滩涂区50 m箱梁施工关键技术[J].桥梁建设,2006,35(3):42-44.(LI You-ming,LI U Nai-sheng,LI N Yuan.Key Techniques for Constructionof Box Girders of Hangzhou Bay Sea-Crossing Bridge withthespan of 50 min Tidal-Flat Area[J].Bridge Construction,2006,35(3):42-44.(in Chinese))
[15]罗业辉.大型预应力混凝土渡槽槽身有限元分析的研究及应用[D].南京:河海大学,2005.(LUO Ye-hui.Study and Appli-cation on FEM Analysis of Large-Scale Prstressed ConcreteAqueduct Body[D].Hohai University,2005.(in Chinese))
[2]潘旦光,张国栋,李峥,等.超大型U型渡槽有限元分析[J].武汉水利电力大学(宜昌)学报,2000,(1).(PAN Dan-guang,ZHANG Guo-dong,LI Zheng,et al.Finite Element Analysis forSuper Large U-Shaped Aqueduct[J].Journal of Wuhan Univer-sity of Hydraulic and Electric Engineering/Yichang,2000,(1).(in Chinese))
[3]陈华兵.大型现浇预应力混凝土U形薄壳渡槽仿真模型试验研究[D].天津:天津大学,2007.(CHEN Hua-bing.Experi-mental Study of Si mulative Model on U-shaped and Thin-walled Prestressed Concrete Aqueduct[D].Tianjin:Tianjin U-niversity,2007.(in Chinese))
[4]孙勇.无黏结部分预应力混凝土叠合梁受力性能的研究[D].北京:中国农业大学,2005.(SUN-Yong.The Research on Flexur-al Behavior of Laminated Beams with Unbounded and PartlyPrestressed Concrete[D].Beijing:China Agriculrural Universi-ty,2005.(in Chinese))
[5]彭辉,雷进生.南水北调中线漕河渡槽结构地震动力特性研究[J].兵工学报,2010,(S1):91-95.(Study on Seismic DynamicCharacteristics of Aqueduct of Caoheinthe Middle of South-to-north Water Diversion Project[J].Acta Armamentarii,2010,(S1):91-95.(in Chinese))
[6]李险峰,张伟.樟洋渡槽预应力钢绞线安装与张拉[J].水利水电施工,2003,(S1).(LI Xian-feng,ZHANG Wei.Installationand Tension of Prestressed Steel Strand for Zhangyang Aque-duct[J].Water Conservancy and Hydropower Construction,2003,(Supp.).(in Chinese))
[7]DL/T 5144-2001,水工混凝土施工规范[S].(DL/T 5144-2001,Construction Standard for Hydraulic Concrete[S].(inChinese))
[8]JTJ 041-2000,公路桥涵施工技术规范[S].(JTJ 041-2000,Technical Code for Highway Bridge Construction[S].(in Chi-nese))
[9]马锋铃.漕河渡槽槽身混凝土配合比优化及性能试验[J].中国水利水电科学研究院学报,2007,5(2):110-113.(MA Feng-ling.Mixing Proportion Opti mization and Property Test of Cao-he Aqueduct Concrete[J].Journal of China Institute of WaterResources and Hydropower Research,2007,5(2):110-113.(inChinese))
[10]王玉华,张利,宋谦.南水北调中线沙河渡槽施工方案研究及优选[J].南水北调与水利科技,2011,9(3):13-16.(WANGYu-hua,ZHANG Li,SONG Qian.Research and Opti mizationof Shahe Aqueduct Construction Scheme in the Middle Routeof South-to-North Water Diversion Project[J].South-to-North Water Diversion and Water Science&Technology,2011,9(3):13-16.(in Chinese))
[11]SL/T191-96,水工混凝土结构设计规范[S].(SL/T 191-96,Design Code for Hydraulic Concrete Structures[S].(in Chi-nese))
[12]刘宪亮.矩形渡槽结构优化设计[J].华北水利水电学院学报,1998,(2):9-12.LI U Xian-liang.The Structural Opti mum De-sign of the Rectangular Flumes[J].Journal of North China In-stitute of Water Conservancy and Hydroelectric Power,1998,(2):9-12.(in Chinese))
[13]夏富洲,王长德,曹为民,等.大流量预应力渡槽设计和施工技术研究[J].南水北调与水利科技,2009,7(6):20-25.(XI AFu-zhou,WANG Chang-de,CAO Wei-min,et al.Research onConstruction Technology and Design for Prestressed ConcreteAqueduct with High Flow[J].South-to-North Water Diver-sion and Water Science&Technology,2009,7(6):20-25.(inChinese))
[14]李友明,刘乃生,林原.杭州湾跨海大桥滩涂区50 m箱梁施工关键技术[J].桥梁建设,2006,35(3):42-44.(LI You-ming,LI U Nai-sheng,LI N Yuan.Key Techniques for Constructionof Box Girders of Hangzhou Bay Sea-Crossing Bridge withthespan of 50 min Tidal-Flat Area[J].Bridge Construction,2006,35(3):42-44.(in Chinese))
[15]罗业辉.大型预应力混凝土渡槽槽身有限元分析的研究及应用[D].南京:河海大学,2005.(LUO Ye-hui.Study and Appli-cation on FEM Analysis of Large-Scale Prstressed ConcreteAqueduct Body[D].Hohai University,2005.(in Chinese))
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