桥梁毕业设计预应力混凝土简支空心板梁桥结构设计及工程施工组织设计.doc

目 录 第1章 方案比选择 3 1.1桥梁设计原则 3 1.2根据上述原则，对桥梁的综合评估 3 第2章 桥型方案说明 5 2.1桥型 5 2.2总体布置 5 2.3下部构造及地基处理 5 2.4 桥面构造 5 2.5 安全 5 2.6计算说明及资料汇总 6 第3章 上部结构设计及计算 7 3.1、构造形式及尺寸选定 7 3.2 毛截面几何特性计算 7 3.3 作用效应计算 9 3.4、预应力钢筋数量估算及布置 19 3.5换算截面几何特性计算 23 3.6 承载能力极限状态计算 24 3.7预应力损失计算 27 3.8正常使用极限状态计算 32 3.9变形计算 35 3.10支座计算 38 第4章 下部结构设计及计算 41 4.1桥墩尺寸拟定 41 4.2盖梁计算 41 4.3内力计算 48 4.4、截面配筋设计与承载力校核 50 4.5斜截面抗剪承载力验算 53 4.6 桥墩墩柱设计 54 4.7截面配筋计算及应力验算 56 4.8 钻孔桩计算 58 总 结 67 致谢 68 参考文献 69 附录 70 ***大桥 摘要:****大桥位于长潭高速主干道上的大桥，为多孔跨径不通航大桥。该桥的建成，确保了长潭高速公路按时竣工，对加强长沙、湘潭两市的经济、文化交流，促进地方经济发展，提高公路运营效益和强化路网结构功能具有十分重要的意义。 立足于桥梁的设计基本原则，坚持合理选用标准，本着质量第一，节约资源的设计理念，以及综合考虑所提供的设计资料，本次设计为20米预应力空心板桥，主梁依照部分预应力A类构件方案设计，?公路桥涵设计通用规范? ?公路钢筋混凝土及预应力混凝土桥涵设计规范?等国家通用规范依序完成承载力及正常使用两极限状态设计，以及持久和短暂状态应力验算，充分保证了全寿命周期的安全度。 关键词； 预应力；空心板；承载力；安全度 ****Bridge Abstract :Chang Tan high-speed ******** bridge is located in Long Lake speed on the main road bridge, span for porous non-navigable bridge. The building of this bridge, the highway is completed on time, to strengthen Changsha, Xiangtan two city economic, cultural exchange, to promote local economic development, improve the operation efficiency and strengthen the highway network structure function has very important significance. Based on the bridge design basic principle, adhere to a reasonable selection of standard, the spirit of quality first, resource conservation design concept, and comprehensive consideration of the design, the design for the20 meters of prestressed hollow plate girder type a component in accordance with partially prestressed, scheme design, design of highway bridges and culverts. general specification of highway reinforced concrete and prestressed concrete highway bridges and culverts, and other countries in order to complete the general specification for bearing capacity and normal use of two limit state design, as well as the persistent and transient state of stress calculation, and fully guarantee the life cycle safety degree. Key words:prestressed；hollow s