一种高铁造桥机技术方案及节段胶拼箱梁线形控制技术研究
发布时间：2018-07-24 19:13
【摘要】：造桥机是桥梁施工中应用较多的一种先进机械设备,胶接缝节段拼装法是采用造桥机施工时一种较新颖的施工方式。胶接缝节段拼装箱梁接缝处没有纵向普通钢筋和混凝土的连接,整孔梁通过梁段间的剪力键和预应力形成整体,对拼装过程中的线形要求非常高。因此研究造桥机在节段胶拼箱梁施工过程中的线形变化规律和调整方法是非常有必要的,具有较强的实用意义,为以后采用同类造桥机进行节段胶拼箱梁的施工提供指导和参考。本文在回顾国内外既有造桥机及节段胶拼技术的基础上,以平潭铁路北东口水道特大桥64 m节段拼装为实际工程背景,利用有限元分析软件ANSYS对一种新型造桥机—SPZ2700/64型腹式节段拼装造桥机的力学性能及胶拼64 m箱梁的过程进行模拟分析,主要工作和结论如下:(1)研究提出了一种新型造桥机—SPZ2700/64型腹式节段拼装造桥机,论述了其技术设计方案、各部件的组成、施工步骤及施工注意事项等。(2)运用ANSYS软件建立了造桥机和箱梁的力学模型,分析了造桥机在全部承载梁段、造桥机过孔过程中前端悬臂最大和后端悬臂最大三种不利工况下的力学性能,得出了造桥机在这三种不利工况下主桁各主要杆件的内力,分析了造桥机主桁的强度和稳定性。分析结果表明:在三种不利工况下,造桥机主桁各杆件的内力均在规范规定的容许范围内,过孔过程中后端悬臂最大的工况为最不利工况,此时杆件内力最大;结构在三种不利工况下都处于局部失稳状态,但结构整体满足规范和使用要求。(3)利用ANSYS软件分别对每节梁段的拼装过程建立了有限元模型,得出了造桥机的初始线形,根据初始线形按设计的固定初始位置摆放部分梁段,模拟得出了每次移动并拼接一节梁段后,造桥机各丝杠标高及其轴力的变化,分析并得出了线形调整方法。拼接过程的模拟结果表明:对于胶接缝节段拼装法,采用逐段拼装逐段调节的过程来施工,也就是在拼接过程中通过调节丝杠标高及控制丝杠轴力来控制节段拼装过程中桥梁的线形,得到的最终结果能满足桥梁设计线形的要求。
[Abstract]:Bridge-making machine is a kind of advanced mechanical equipment which is widely used in bridge construction. The glue joint segment assembly method is a novel construction method in the construction of bridge construction machine. There is no longitudinal connection between common steel bar and concrete at the joint of jointed box girder. The whole hole beam is formed by the shear key and prestressing force between the beam segments, so the alignment requirement in the process of assembling is very high. Therefore, it is very necessary and practical to study the changing law and adjusting method of the linear shape of the bridge construction machine in the construction process of the segmental gluing box girder. It provides guidance and reference for the construction of segmental glue box girder with similar bridge-making machine. On the basis of reviewing the existing bridge construction machines and segmental glue assembly technology at home and abroad, this paper takes the 64 m section assembly of the Beidongkou Waterway Bridge in Pingtan Railway as the practical engineering background. The mechanical properties of a new type of bridge-making machine, SPZ2700 / 64, and the process of assembling 64 m box girder are simulated and analyzed by using the finite element analysis software ANSYS. The main work and conclusions are as follows: (1) A new type of bridge-making machine, SPZ2700 / 64, is proposed, and its technical design scheme and components are discussed. (2) the mechanical model of bridge maker and box girder is established by using ANSYS software. The mechanical properties of the main truss members of the bridge machine under the three unfavorable working conditions are obtained, and the strength and stability of the main truss are analyzed. The results show that the internal forces of each member of the main truss of the bridge machine are all within the allowable range stipulated in the code under three unfavorable working conditions, and the most disadvantageous working condition is the maximum working condition of the rear end cantilever in the process of passing through the hole, when the internal force of the member is the largest; The structure is in the state of local instability under three unfavorable conditions, but the whole structure meets the requirements of code and application. (3) the finite element model is established for each segment of beam assembly by using ANSYS software, and the initial alignment of the bridge construction machine is obtained. According to the initial line shape, according to the fixed initial position of the design, the variation of the elevation of each lead screw and its axial force of the bridge construction machine is obtained by simulation after moving and splicing one section of beam section each time, and the adjustment method of the line shape is analyzed and obtained. The simulation results of stitching process show that: for the glue joint segment assembly method, the process of piecewise assembly adjustment is adopted to construct, In the process of splicing, the alignment of the bridge is controlled by adjusting the elevation of the screw and controlling the axial force of the screw, and the final results can meet the requirements of the design of the bridge.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.4
本文编号：2142366
[Abstract]:Bridge-making machine is a kind of advanced mechanical equipment which is widely used in bridge construction. The glue joint segment assembly method is a novel construction method in the construction of bridge construction machine. There is no longitudinal connection between common steel bar and concrete at the joint of jointed box girder. The whole hole beam is formed by the shear key and prestressing force between the beam segments, so the alignment requirement in the process of assembling is very high. Therefore, it is very necessary and practical to study the changing law and adjusting method of the linear shape of the bridge construction machine in the construction process of the segmental gluing box girder. It provides guidance and reference for the construction of segmental glue box girder with similar bridge-making machine. On the basis of reviewing the existing bridge construction machines and segmental glue assembly technology at home and abroad, this paper takes the 64 m section assembly of the Beidongkou Waterway Bridge in Pingtan Railway as the practical engineering background. The mechanical properties of a new type of bridge-making machine, SPZ2700 / 64, and the process of assembling 64 m box girder are simulated and analyzed by using the finite element analysis software ANSYS. The main work and conclusions are as follows: (1) A new type of bridge-making machine, SPZ2700 / 64, is proposed, and its technical design scheme and components are discussed. (2) the mechanical model of bridge maker and box girder is established by using ANSYS software. The mechanical properties of the main truss members of the bridge machine under the three unfavorable working conditions are obtained, and the strength and stability of the main truss are analyzed. The results show that the internal forces of each member of the main truss of the bridge machine are all within the allowable range stipulated in the code under three unfavorable working conditions, and the most disadvantageous working condition is the maximum working condition of the rear end cantilever in the process of passing through the hole, when the internal force of the member is the largest; The structure is in the state of local instability under three unfavorable conditions, but the whole structure meets the requirements of code and application. (3) the finite element model is established for each segment of beam assembly by using ANSYS software, and the initial alignment of the bridge construction machine is obtained. According to the initial line shape, according to the fixed initial position of the design, the variation of the elevation of each lead screw and its axial force of the bridge construction machine is obtained by simulation after moving and splicing one section of beam section each time, and the adjustment method of the line shape is analyzed and obtained. The simulation results of stitching process show that: for the glue joint segment assembly method, the process of piecewise assembly adjustment is adopted to construct, In the process of splicing, the alignment of the bridge is controlled by adjusting the elevation of the screw and controlling the axial force of the screw, and the final results can meet the requirements of the design of the bridge.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.4
【参考文献】
相关期刊论文 前10条
1 孙志星;王海民;;SPZ1300/48节段拼装箱梁造桥机稳定性分析研究[J];价值工程;2016年23期
2 杨树民;;节段拼装梁胶接法施工梁段预制关键技术分析[J];铁道建筑技术;2016年04期
3 张亚锋;;SPZ2700×2/64型双孔连做节段拼装造桥机的研制[J];铁道建筑技术;2015年11期
4 高明昌;;铁路节段预制胶接拼装简支箱梁的技术特点和优势[J];铁道建筑;2015年10期
5 石健;;客运专线64m双线节段拼装预应力混凝土简支箱梁拼装工艺与线形控制技术[J];黑龙江科技信息;2015年03期
6 张立青;;铁路节段预制胶接拼装法建造桥梁技术与应用[J];铁道建筑技术;2015年01期
7 袁爱民;何雨;程磊科;钱守龙;;节段预制桥梁胶接缝剪切性能试验研究[J];重庆交通大学学报(自然科学版);2014年06期
8 张立青;;节段预制拼装法建造桥梁技术综述[J];铁道标准设计;2014年12期
9 尚庆保;;铁路64m跨双线简支箱梁节段(胶接缝)拼装施工技术[J];铁道建筑技术;2015年02期
10 陈敦;成仲鹏;;造桥机节段拼装64m简支箱梁施工关键技术研究[J];筑路机械与施工机械化;2014年03期
相关硕士学位论文 前5条
1 徐艳平;基于ANSYS的900t造桥机有限元分析[D];长安大学;2011年
2 黄杰;64m八七型抢修钢梁移动支架造桥机结构分析与仿真计算[D];长安大学;2010年
3 杜松;MZ3200型造桥机仿真分析和施工控制研究[D];北京交通大学;2008年
4 王渊;城市高架轨道交通节段拼装桥梁施工及控制技术研究[D];中南大学;2008年
5 李一可;铁路货运40m混凝土箱梁移动模架架桥机移动过程力学性能研究[D];中南大学;2007年
，本文编号：2142366
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2142366.html
