毕设基本摘要
摘 要
桥梁是国民经济中的重要基础设施，目前我国在钢筋混凝土梁桥的设计及施工技术方面达到了世界先进水平。本设计是根据毕业设计任务书的要求和《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTG D62-2004)的规定，本着“安全、经济、美观、适用”的八字原则进行拟定桥梁形式及构件尺寸，最后确定为混凝土T形简支梁桥为设计方案。
在设计中，根据设计要求和规范标准确定桥跨径16m、桥净高4.5m、主梁高1.5m、盖梁高1.5m、桥墩直径1.6m、桩直径1.8m。在全长64m的桥梁设计中查阅了大量规范资料，在上部结构的计算中着重分析了桥梁在预加力阶段和运营阶段中恒载以及活载的作用，运用杠杆原理法、G-M法求出活载横向分布系数，并运用影响线进行活荷载最不利情况下的加载，对桥梁主梁、横隔梁、盖梁、桥墩和桩基础等进行了的荷载作用的计算、内力组合、截面设计与配筋、承载力验算、应力验算、抗裂性验算、变形验算等，且经过大量反复的验算使其均符合规范要求。最后得到了符合设计要求和规范的计算书和施工图。
关键词：混凝土；T形梁桥；双柱墩；钻孔灌注桩
Abstract
This design is based on the requirements of the design plan descriptions of the graduation and the highway of reinforced concrete and prestressed concrete bridge design rules "(JTG D62-2004) regulation for bridge forms and section size, design the structure and foundation pile caps. The design of the bridge, in "safety, economy, beautiful, applicable" of the eight principles, and according to the geographical location, determined for concrete T shape beam bridge for design.
Reinforced concrete beam bridge in China by the great development, at present, our country in reinforced concrete bridge construction model T technology has reached the international advanced level.
In the design, according to the design requirements and standards to determine long span bridge 16 m, 4.5 m, girder bridge clear height is 1.5 m, 1.5 m high capping beam bridge diameter of 1.6 m, 1.8 m diameter, outfit. In the 64 m bridge the calculation of the upper structure focuses on the analysis of the bridge in the strength stage and operation stage zhongheng load and live load effect, use lever principle method, G-m method for live load transverse distribution coefficient, and use of influence line for live load load most unfavorable conditions.The main bridge of the load calculation, internal force combination, and section design and reinforcement, carrying capacity, and stress checking and calculating resistance to checking and calculating the deformation, etc and all conform to the standard, but also the design, build support beam design, design and bridge pile design, and different pile foundation of the piers and calculated and checked. Finally got comply with the design requirements and norms of calculations and construction drawings.
Key words： concrete；beam bridge；double pier；cast-in-place pile
设计跨径：4×16m
净宽：1.0m人行道+4.25 m（行车道）+0.5m（分隔栏）+4.25 m（行车道）+1.0m人行道， 全宽11m
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