龙旺大桥关键施工环节计算

发布时间：2018-10-11 11:16

【摘要】：本文以龙旺大桥为依托工程,分别从墩台施工、0#施工、挂篮施工及合拢施工等方面进行了施工方案的设计与布置,对施工的技术质量要求作出明确的要求,对关键性工程进行了专项的设计与验算,对实际的工程建设具有重要的参考价值。本文的主要结论如下： 1、针对位于水中的4#、5#桥墩的大体积混凝土承台施工进行的专项的施工方案设计,提出在筑岛围堰上直接插打锁口钢管桩形成围堰施工承台的方法,并根据实际水文情况进行了计算,提出了施工所用材料的各项性能指标； 2、0#块的施工是整个桥梁施工的控制性工程,关系着整个工程的质量和后期的运营。针对龙旺大桥工程特点,本文提出了0#的施工方案及0#支架搭设及设计与计算的全部工作,并计算了0#支架的受力性能,计算了底模的受力、纵向分配梁的受力、横向分配梁的受力、贝雷梁的受力、桩顶分配梁的受力以及钢管桩的受力,从各个方面对支架以及支架上的模版进行受力计算,保证施工的安全可靠； 3、采用挂篮施工的桥梁,主梁施工基本上就是在挂篮上完成的,挂篮质量的好坏与稳定性直接关系到施工的安全性与线型的控制。本文对龙旺大桥的主梁施工挂篮进行了针对性的设计,以使满足本桥的阶段划分的特殊要求。文章设计了挂篮的总体组成、挂篮的安装、挂篮的预压及挂篮的前移。本文对设计好的挂篮进行了相应的计算,依次进行了挂篮底模系统及吊杆的计算,底模纵梁验算,底模前、后下横梁的受力性能,上横梁的受力性能,底模前、后吊带的力学性能,并对挂篮的主桁以及挂篮在自重和冲击荷载作用下迁移进行了受力分析,使之逐一通过验算,保证挂篮的安全使用,保证工程能够保质保量的顺利完成； 4、本文对桥梁的边跨合拢段和中跨合拢段进行了施工设计,并对合拢方案进行了相应的验算。通过边跨合拢段及中跨合拢段的计算,控制合拢的受力条件,保证桥梁的顺利合拢,同时也保证了合拢的安全与施工的质量。本文通过依托工程龙旺大桥,研究了桥梁施工的整个流程,并对施工过程中的关键性工程进行了相应的施工方案设计,并对设计的方案进行了对应的验算,保证每一步工作的科学性和完整性,为桥梁的顺利施工提供了科学的依据,保证了桥梁的施工安全与质量,为同类工程提供参考。
[Abstract]:Based on the Longwang Bridge, this paper designs and arranges the construction schemes from the aspects of pier and abutment construction, 0# construction, hanging basket construction and closing construction, and makes clear requirements for the technical quality of construction. The special design and checking calculation of the key engineering are carried out, which has important reference value for the actual engineering construction. The main conclusions of this paper are as follows: 1. The design of the special construction scheme for the mass concrete cap construction of 4 #an bridge piers in water. This paper puts forward the method of directly inserting lock hole steel pipe pile to form cofferdam construction cap, and calculates according to the actual hydrological situation, and puts forward the performance indexes of the materials used in construction. 2the construction of the block is the control project of the whole bridge construction, which is related to the quality of the whole project and the later operation. In view of the engineering characteristics of Longwang Bridge, this paper puts forward the construction scheme of 0# and the whole work of erection, design and calculation of 0# support, and calculates the mechanical behavior of the support, the force of bottom form and the force of longitudinal distribution beam. In order to ensure the safety and reliability of the construction, the forces of the transverse distribution beam, the Beere beam, the top of the pile distribution beam and the steel pipe pile are calculated from various aspects. (3) the construction of the main girder is basically completed on the hanging basket, and the quality and stability of the hanging basket are directly related to the safety and the control of the alignment of the construction. In this paper, the construction basket of the main girder of Longwang Bridge is designed in order to meet the special requirements of the stage division of the bridge. This paper designs the overall composition of the hanging basket, the installation of the hanging basket, the preloading of the hanging basket and the forward movement of the hanging basket. In this paper, the corresponding calculation of the designed hanging basket is carried out, including the calculation of the hanging basket bottom mould system and the hanging rod in turn, the checking calculation of the bottom die longitudinal beam, the mechanical behavior of the front and back bottom beam, the mechanical performance of the upper beam, the front of the bottom die, The mechanical properties of the rear suspension belt, and the force analysis of the main truss of the hanging basket and the transfer of the hanging basket under the action of deadweight and impact load are carried out to ensure the safe use of the hanging basket and the smooth completion of the project under the influence of self-weight and impact load one by one through checking calculation. 4. In this paper, the construction design of the side span closure section and the middle span closure section of the bridge is carried out, and the corresponding checking calculation of the closing scheme is carried out. Through the calculation of the side span closing section and the middle span closing section, the stress condition of the closure is controlled to ensure the smooth closure of the bridge, and at the same time, the safety of the closure and the quality of the construction are guaranteed. Based on the Longwang Bridge, the whole construction process of the bridge is studied, and the corresponding construction scheme design of the key project in the construction process is carried out, and the corresponding checking calculation of the design scheme is carried out. To ensure the scientific and integrity of each step of the work, to provide a scientific basis for the smooth construction of the bridge, to ensure the safety and quality of the bridge construction, and to provide reference for similar projects.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4

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