援马尔代夫中马友谊大桥总体设计
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摘要
援马尔代夫中马友谊大桥主桥为(100+2×180+140+100+60)m混合梁V形支腿连续刚构桥。主梁采用混凝土梁+钢箱叠合梁的混合梁,19～22号墩间三孔梁跨中区段为钢箱-超高性能混凝土叠合梁,其余区段均为预应力混凝土梁。为改善中跨受力,在19～21号墩顶设置V形支腿,采用1道厚2.0m的横隔板实现墩顶主梁、V形支腿、中跨主梁的连接。针对强涌浪区、珊瑚礁地质条件,主桥墩基础采用变截面钢管复合桩基础,成桩后钢护筒参与桩基础结构受力。耐久性设计采用海工高性能混凝土和适当增加混凝土保护层厚度的基本防腐原则,同时针对不同结构部位增加相应的附加防腐措施。
The China-Maldives Friendship Bridge is a continuous rigid frame bridge which has a structure of hybrid girder and V-shaped supporting legs,and a span arrangement of(100+2×180+140+100+60)m.The hybrid main girder is composed of concrete girder and composite steel box girder.The composite girders composed of steel-box and ultra high performance concrete are adopted for the mid-span segments between piers No.19-22,and prestressed concrete girders for the rest segments.In order to improve mechanical behavior of the mid-span,V-shaped supporting legs are arranged on the top of piers No.19-21.A diaphragm with a thickness of 2.0 mis adopted to connect the main girder on the pier top,V-shaped supporting legs,and main girder at the midspan.The conditions of severe swell and coral reef geology are taken into account,thus the concrete-filled steel tubular piles with variable cross-sections are adopted to construct the foundation of main piers,and the bearing capacity of pile foundation should include that of steel tubes after the piles are completed.In the durability design,the basic anti-corrosion principles of applying marine high-performance concrete and appropriately increasing of coverage thickness are adopted,furthermore,some additional anti-corrosion measures are taken in different parts of bridge.
The China-Maldives Friendship Bridge is a continuous rigid frame bridge which has a structure of hybrid girder and V-shaped supporting legs,and a span arrangement of(100+2×180+140+100+60)m.The hybrid main girder is composed of concrete girder and composite steel box girder.The composite girders composed of steel-box and ultra high performance concrete are adopted for the mid-span segments between piers No.19-22,and prestressed concrete girders for the rest segments.In order to improve mechanical behavior of the mid-span,V-shaped supporting legs are arranged on the top of piers No.19-21.A diaphragm with a thickness of 2.0 mis adopted to connect the main girder on the pier top,V-shaped supporting legs,and main girder at the midspan.The conditions of severe swell and coral reef geology are taken into account,thus the concrete-filled steel tubular piles with variable cross-sections are adopted to construct the foundation of main piers,and the bearing capacity of pile foundation should include that of steel tubes after the piles are completed.In the durability design,the basic anti-corrosion principles of applying marine high-performance concrete and appropriately increasing of coverage thickness are adopted,furthermore,some additional anti-corrosion measures are taken in different parts of bridge.
引文
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[8]刘海峰,朱长歧,孟庆山,等.礁灰岩嵌岩桩的模型试验[J].岩土力学,2018,39(5):1 581-1 588.(LIU Hai-feng,ZHU Chang-qi,MENG Qing-shan,et al.Model Test on Rock-Socketed Pile in Reef Limestone[J].Rock and Soil Mechanics,2018,39(5):1 581-1 588.in Chinese)
[9]达波,余红发,麻海燕,等.南海岛礁普通混凝土结构耐久性的调查研究[J].哈尔滨工程大学学报,2016,37(8):1 034-1 040.(DA Bo,YU Hong-fa,MA Hai-yan,et al.Investigation of Durability of Ordinary Concrete Structures in the South China Sea[J].Journal of Harbin Engineering University,2016,37(8):1 034-1 040.in Chinese)
[10]秦明强,宋颖彤,胡家兵,等.透水模板布渗透硅烷工艺影响因素研究[J].施工技术,2017,46(17):78-81.(QIN Ming-qiang,SONG Ying-tong,HU Jia-bing,et al.Study on Influencing Factors of Construction Technology of CPF with Silane Impregnation[J].Construction Technology,2017,46(17):78-81.in Chinese)
[2]袁征,余克服,王英辉,等.珊瑚礁岩土的工程地质特性研究进展[J].热带地理,2016,36(1):87-93.(YUAN Zheng,YU Ke-fu,WANG Ying-hui,et al.Research Progress in the Engineering Geological Characteristics of Coral Reefs[J].Tropical Geography,2016,36(1):87-93.in Chinese)
[3]刘钊.混凝土桥梁溯源与发展思考[J].桥梁建设,2013,43(5):5-11.(LIU Zhao.Historical Review and Development Concern of Concrete Bridges[J].Bridge Construction,2013,43(5):5-11.in Chinese)
[4]马振栋,刘安双.控制大跨连续刚构桥梁过度下挠的技术措施[J].桥梁建设,2015,45(2):71-76.(MA Zhen-dong,LIU An-shuang.Technical Measures for Control of Excessive Deflection of Girders of Long Span Continuous Rigid-Frame Bridges[J].Bridge Construction,2015,45(2):71-76.in Chinese)
[5]郑清刚,肖海珠.援马尔代夫中马友谊大桥主梁钢箱梁设计[J].桥梁建设,2018,48(3):95-99.(ZHENG Qing-gang,XIAO Hai-zhu.Design of Steel Box Girder for Main Girder of China-Maldives Friend Ship Bridge Aided to Maldives By China[J].Bridge Construction,2018,48(3):95-99.in Chinese)
[6]田启贤,高立强,周尚猛.超高性能混凝土-钢正交异性板组合桥面受力性能研究[J].桥梁建设,2017,47(3):13-18.(TIAN Qi-xian,GAO Li-qiang,ZHOU Shang-meng.Study of Mechanical Behavior of Composite Bridge Deck with Ultra High Performance Concrete and Orthotropic Steel Plate[J].Bridge Construction,2017,47(3):13-18.in Chinese)
[7]陈山亭.港珠澳大桥浅水区非通航孔桥下部结构施工关键技术[J].桥梁建设,2016,46(1):6-11.(CHEN Shan-ting.Key Techniques for Construction of Substructure of Non-Navigable Span Bridge of Hong Kong-Zhuhai-Macao Bridge over Shallow Water Area[J].Bridge Construction,2016,46(1):6-11.in Chinese)
[8]刘海峰,朱长歧,孟庆山,等.礁灰岩嵌岩桩的模型试验[J].岩土力学,2018,39(5):1 581-1 588.(LIU Hai-feng,ZHU Chang-qi,MENG Qing-shan,et al.Model Test on Rock-Socketed Pile in Reef Limestone[J].Rock and Soil Mechanics,2018,39(5):1 581-1 588.in Chinese)
[9]达波,余红发,麻海燕,等.南海岛礁普通混凝土结构耐久性的调查研究[J].哈尔滨工程大学学报,2016,37(8):1 034-1 040.(DA Bo,YU Hong-fa,MA Hai-yan,et al.Investigation of Durability of Ordinary Concrete Structures in the South China Sea[J].Journal of Harbin Engineering University,2016,37(8):1 034-1 040.in Chinese)
[10]秦明强,宋颖彤,胡家兵,等.透水模板布渗透硅烷工艺影响因素研究[J].施工技术,2017,46(17):78-81.(QIN Ming-qiang,SONG Ying-tong,HU Jia-bing,et al.Study on Influencing Factors of Construction Technology of CPF with Silane Impregnation[J].Construction Technology,2017,46(17):78-81.in Chinese)