[1]吴大宏,左家强,苏 勇.变曲率小半径顶推混凝土连续梁关键技术研究[J].高速铁路技术,2017,8(06):56-61,77.[doi:10.12098/j.issn.1674-8247.2017.06.012]
　WU Dahong ZUO Jiaqiang SU Yong.Study on Key Technology for Concrete Continuous Beam with Variable Curvature and Small Radius[J].HIGH SPEED RAILWAY TECHNOLOGY,2017,8(06):56-61,77.[doi:10.12098/j.issn.1674-8247.2017.06.012]
点击复制

变曲率小半径顶推混凝土连续梁关键技术研究()
分享到：

《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
8卷
期数:
2017年06期
页码:
56-61,77
栏目:
出版日期:
2017-11-15

文章信息/Info

Title:
Study on Key Technology for Concrete Continuous Beam with Variable Curvature and Small Radius
文章编号:
1674—8247(2017)06—0056—06
作者:
吴大宏; 左家强; 苏 勇
中国铁路设计集团有限公司, 天津 300142
Author(s):
WU Dahong ZUO Jiaqiang SU Yong
China Railway Design Corporation,Tianjin 300142,China
关键词:
变曲率小半径桥;  顶推施工;  关键技术分析
Keywords:
Key words:variable curvature and small radius bridge;  incremental launching construction;  key problem analysis
分类号:
U445.462
DOI:
10.12098/j.issn.1674-8247.2017.06.012
文献标志码:
A
摘要:
新建北同蒲铁路韩家岭至应县增建四线工程中,朔州至山阴联络线上跨既有铁路桥梁为(32+48+32)m的变曲率小半径曲线预应力混凝土连续梁,受上跨铁路要求,设计首次采用整体顶推施工。文章重点介绍了跨既有铁路段变曲率小半径曲线梁顶推过程中,千斤顶、锚拉器、预应力钢束的布置,顶推方向、顶推稳定性的施工控制,以及导梁、主梁的检算分析。主要研究结论包括:(1)主梁截面采用单箱单室直腹板,水平千斤顶ZLD100型沿曲线梁顶推轨迹割线方向布置;(2)导梁分阶段制造,采用以折代曲的方式适应曲线变化;(3)支座中心距取3m满足施工和运营阶段抗倾覆稳定性要求;(4)曲线梁采取下坡顶进,有利于控制顶进方向和降低落梁高差;(5)利用Midas软件对曲线梁走行过程中导梁和主梁进行应力分析、横弯分析和局部分析,结果满足规范要求。
Abstract:
Abstract:Shuozhou-Shanyin connecting line in the new four-line project of Hanjialing-Yingxian line is across the existing railway. The overpass bridge is(32+48+32)m prestressed concrete continuous beam with variable curvature and small radius. According to the requirements of the existing railway, incremental launching construction is first adopted in the design. This paper focuses on the layout of jack, anchor and prestressed tendon, the incremental launching direction, the construction control of incremental launching stability and the checkup analysis of guide beam and main beam during the incremental launching construction of curved continuous beam with variable curvature and small radius. The main research conclusions include that the single box, single chamber and straight-web shall be used for main beam section and ZLD100 type horizontal jack shall be arranged along the secant direction of incremental launching track of curved beam; the guide beam shall be made by stages and is adapted to the curve change by broken line instead of curve; The center distance of the support shall be 3m so as to meet the requirements of anti-overturning stability at the stage of construction and operations; it is advantageous to control the jacking direction and reduce the height difference of falling beam by taking the downhill jacking; the analysis has been on stress, transverse bending and locality of main beam and guide beam by universal finite element software MIDAS and the result is satisfied with the requirements in the Code.

参考文献/References:

[1] TB 10002.3-2005 铁路桥涵钢筋混凝土和预应力混凝土结构设计规范[S]. TB 10002.3-2005 Code for Design of Reinforced Concrete and Prestressed Concrete Structures of Railway Bridges and Culverts [S].
[2] 刘杰.大跨度钢箱梁斜交顶推结构受力特性与施工控制技术研究[D].长沙:长沙理工大学,2006. LIU Jie. Research on Mechanical Characteristics And Construction Control Technology of Oblique Incremental Launching Structure of Long-Span Steel Box Girder [D]. Changsha: Changsha University of Science and Technology, 2006.
[3] 范立础.桥梁工程[M].北京:人民交通出版社,2001. FAN Lichu.Bridge Engineering [M]. Beijing: China Communications Press, 2001.
[4] 郝志侃.预应力混凝土连续箱梁顶推施工[J].山西建筑,2004,30(6):68-69. HAO Zhikan. Incremental Launching Construction of Prestressed Continuous Concrete Box Girder [J]. Shanxi Architecture, 2004, 30(6): 68-69.
[5] 钟启宾.我国连续顶推技术的最新发展概况[J].桥梁建设,1994,24(2):46-48. ZHONG Qibin. The Latest Development of Continuous Incremental Launching Technology in China [J]. Bridge Construction, 1994, 24(2): 46-48.
[6] 刘建龙.哈尔滨尚志大桥连续钢箱梁顶推设计与施工技术[J].中南公路工程,2005,30(1):110-112. LIU Jianlong. Trust Design and Construction Techniques of Continuous Steel Box Girder of Haerbin Shangzhi Bridge[J]. Central South Highway Engineering, 2005, 30(1): 110-112.
[7] 王文雷,冯德飞,卢文良.顶推法施工中钢箱梁在滑道处的局部应力分析[J].北京交通大学学报,2006,30(S1):190-193. WANG Wenlei, FENG Defei, LU Wenliang. Local Stress Analysis of Steel Box Beam Close to Sliding Path by Incremental Launching Method [J]. Journal of Beijing Jiaotong University, 2006, 30(S1): 190-193.
[8] 赵如东.连续梁顶推技术的新发展[J].水运工程,2004,32(3):130-133. ZHAO Rudong. New Development of Incremental Launching Method for Continuous Beams [J]. Port & Waterway Engineering, 2004, 32(3): 130-133.
[9] 闫波.太平沟大桥曲线箱梁顶推施工设计概述[J].科技情报开发与经济,2004,14(6):276-277. YAN Bo. On the Curved Box-beam Push Construction of the Taipinggou Bridge [J]. SCI/TECH Information Development & Economy, 2004, 14(6): 276-277.
[10] 蒋田勇,安磊,田仲初,等.斜交连续箱梁顶推施工中落梁仿真分析[J].桥梁建设,2014,44(1):101-106. JIANG Tianyong, AN lei, TIAN Zhongchu, et al. Simulation Analysis of Jacking-down of Girder In Incremental Launching Construction of Oblique Continuous Box Girder[J]. Bridge Construction, 2014, 44(1): 101-106.

备注/Memo

备注/Memo:
作者简介:吴大宏(1975-),男,教授级高级工程师。
更新日期/Last Update: 2017-12-15