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归档日期:12-10       文本归类:大冶组      文章编辑:爱尚语录

  本设计根据毕业设计任务书的要求和相关桥规的规定,综合分析马水河附近,宜昌台岸坡上部出露地层为三叠系嘉陵江组中厚层灰岩,下部及万县台岸坡出露地层为三叠系大冶组薄层状灰岩夹泥灰...

  本设计根据毕业设计任务书的要求和相关桥规的规定,综合分析马水河附近,宜昌台岸坡上部出露地层为三叠系嘉陵江组中厚层灰岩,下部及万县台岸坡出露地层为三叠系大冶组薄层状灰岩夹泥灰岩,呈弱风化至微风化,其中宜昌台岸坡壁可见溶洞发育的地理特性。对马水河大桥引桥进行方案比选、设计,最终确定预应力混凝土简支T梁桥为推荐方案。在设计中,桥梁上部结构计算着重分析桥梁在使用过程中恒载及活载的作用。运用杠杆原理法、刚接梁法求出各计算截面的活载横向分布系数,并按最不利荷载法进行活载的加载。上部结构计算包括截面几何特性计算、梁的配筋计算、预应力损失估算,并进行预应力阶段和使用阶段主梁截面的强度和变形验算、主梁挠度计算、锚固区局部承压验算、横隔梁的验算和。下部结构采用以钻孔灌注桩为基础的双墩柱,并分别对盖梁和桥墩进行了设计和验算。

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  The design of the book under the mandate graduation requirements and regulatory requirements related to the bridge, comprehensive analysis of Ma River near Yichang station upper slope strata exposed in the thick layer of Triassic limestone Jialing Group, and the lower slope exposed to Wanxian Taiwan thin layer of Triassic Daye Formation limestones folder-like marl, weakly weathered to the breeze, in which the slope of Yichang station wall visible geographical features of cave development. On the Ma River Bridge Approach for scheme selection, design, and ultimately determine the prestressed concrete simply supported T beam bridge the recommended program. In the design, calculation of the bridge superstructure bridge analyzed contained in the used Chengzhong Heng and live load effect. Using the lever principle method, rigid beam calculations obtained cross section of the lateral live load distribution factors, load method according to the most unfavorable loading of live load. Upper structures of geome

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