设计总说明：本次毕业设计我选择的题目是石梁子桥设计，石梁子桥建成后将具备时速200km/h双线高速客运通行能力。设计结果应当满足国家现行设计规范要求，在经过仔细研读任务书介绍，综合考虑了施工难度、工程造价、美观性和环保性等多方面因素后，最终决定采用六跨预应力混凝土箱型简支梁。每个箱型梁梁长32。6米，跨径31。5米，梁高3。05。m，梁顶宽13。4m，箱梁的界面类型是单箱单室等高度箱型简支梁，在靠近支点处对顶板、底板和腹板进行加厚，利于预应力钢筋锚固。梁体使用C50混凝土，预应力钢筋采用1X7-15。2-1860预应力钢绞线，使用自锚式拉丝锚固体系，使用两种预应力钢筋束分别为12-7Φ5和9-7Φ5。全部箱型梁采用预制的方法进行制作，等到梁体达到设计强度后对其进行架设。本文主要介绍了该桥的设计和计算过程。首先根据任务书上相关地形、地质、水文条件等拟定3种桥梁结构主要尺寸进行方案比选，经过技术经济比较确定最佳桥型方案，然后进行上部结构设计，拟定上部结构的细部尺寸，确定施工方案，对推荐桥梁方案进行运营及施工阶段的内力计算，并进行内力组合，强度、刚度、稳定性等验算。76130

毕业论文关键词： 铁路桥梁；预应力；箱型简支梁

Design of Shiliangzi Bridge

Design General Description: The graduation design I chose the title is Shi Liangzi bridge design, Shi Liangzi Bridge will be built with a speed of 200km / h two-lane high-speed passenger capacity。 The design results should meet the requirements of the country's current design specifications, after careful study of the task book introduced, taking into account the construction difficulty, project cost, aesthetics and environmental protection and other factors, the final decision to use six-span prestressed concrete box Beam Each box beam beam length 32。6 meters, span 31。5 meters, beam height 3。05。m, beam top width 13。4m, box beam interface type is single box single room height box type simple beam, near the fulcrum at the roof, The bottom plate and web are internally thickened to facilitate prestressed steel bars。 The beam is made of C50 concrete, and the prestressed steel bar is made of 1X7-15。2-1860 prestressed steel strand。 The self-anchored wire drawing and anchoring system is used。 The two prestressed tendons are 12-7Φ5 and 9-7Φ5 respectively。 All box girders are made of prefabricated methods, so that the beam can be erected when the design strength is reached。 This paper mainly introduces the design and calculation process of the bridge。 First of all, according to the relevant terrain, geology, hydrological conditions, etc。 to prepare three kinds of bridge structure of the main dimensions of the program comparison, through the technical and economic comparison to determine the best bridge type program, and then the upper structure design, the upper structure of the detailed size, Construction plan, the recommended bridge program operation and construction phase of the internal force calculation, and internal force combination, strength, stiffness, stability and other checks。

KeyWords： Railway bridge; Prestressed; Box type simply supported beam

目 录

1 绪论 1

2 设计资料 1

2。1 设计规范 1

2。2 设计依据 2

2。3 地质情况概述 2

2。4 相关资料