箱型梁桥设计

论文编号:TM008  论文字数:29108,页数:50    全套（包括图纸，计算书，设计任务书）

摘   要
 
 巴嘎吉林郭勒桥初步设计为20的预应力混凝土简支箱形梁桥。该桥采用两车道布置。上部为装配式部分预应力混凝土简支箱梁。预制箱梁高1.2，主梁间距2.9。为降低主梁高度，减少预应力引起的上拱度，后张法预应力混凝土箱梁在设计荷载下按部分预应力混凝土A类构件设计，主梁配筋采用预应力筋和非预应力筋混合配筋。锚具采用OVM15—5型锚具，锚具变形钢筋回缩按4计。预制件在张拉钢绞线时混凝土的强度应达到85%以上方可张拉。下部桥墩为钢筋混凝土圆形双柱式墩，墩柱直径1.2；桥墩基础为单排双列钻孔灌注桩基础，桩径1.4。桥墩盖梁为连续墩盖梁，按简支梁计算盖梁内力及墩柱顶竖向反力。桩基采用为单排桩形式，间距6.7。
 
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下部结构       后张法      锚固      预应力混凝土       
  
 Abstract
 
 The program of  Guole  Bridge from Baga to Jilin county preliminary design for 20m pre-stressed concrete free supported box girder bridge. This bridge has Two driveway. The upside of bridge is the type of assembly partial prestressed reinforcement concrete simple underprop box girder. Prefabricating box girder has the tallness of 1.2m, the girder’s span length is 2.90m. In order to reduce the girder’s tallness, reduce the superior camber which the pre-stressed causes, the post tenioning pre-stressed concrete box girder under the designed load is designed according to the partical pre-stressed concrete A member, the girder adopt the mixed complex of the pre-stressed reinforcing steel bar and the non-pre-stressed reinforcing steel bar. The anchorage uses the OVM15-5 anchorage, the anchorage’s distortion and reinforcing steel bar’s shrinkage is according to the length of 4㎜. Pre-workpiece when pull the steel wring wire, the reinforcing steel bar can be tension until the concrete tensive intensity should only achieve above 85%. The pier of the bridge’s Infrastructure is the reinforced concrete circular distyle pillar, foot stall’s diameter is 1.2m; Pier’s bedrock for single line double row drill hole irrigation pile foundation, stake’s diameter is 1.4m. Bridge pier plate girder is continual pier plate girder which calculates plate pier’s internal force and the pier’s top vertical force according to the simple beam. Pile foundation use the single piling form, span 6.7m.
 
 Keywords
 
 Substructure   Post tensioning concrete     Anchorage        Prestressed concrete

目    录   
前言 ……………………………………………………………………………………………………1
第一部分  上部结构的计算
 1.行车道板计算 ……………………………………………………………………………………2
 1.1 悬臂板荷载效应计算 ………………………………………………………………………2
 1.2 连续板荷载效应计算 ………………………………………………………………………2
 1.3 内力组合计算 ………………………………………………………………………………4
 1.4 行车道板配筋 ………………………………………………………………………………4
 2.主梁内力计算与配筋  ………………………………………………………………………… 4
 2.1 主梁截面几何特性的计算  ……………………………………………………………… 4
 2.2 主梁恒载内力计算  ……………………………………………………………………… 5
 2.3 主梁活载内力计算  ……………………………………………………………………… 7
 3. 截面设计   ………………………………………………………………………………… 11
 3.1 预应力钢束数量的确定及布置……………………………………………………………11
 3.2 截面几何特性计算 ……………………………………………………………………… 13
 3.3 截面承载能力极限状态计算 …………………………………………………………… 17
 3.4 预应力损失计算 ………………………………………………………………………… 19
 3.5 正常使用极限状态计算 ………………………………………………………………… 21
 3.6 持久状况应力计算 ……………………………………………………………………… 24
 3.7 短暂状态应力验算 ……………………………………………………………………… 25
   4. 锚固端验算……………………………………………………………………………………26
 4.1混凝土的局部承压承载力………………………………………………………………… 26
 5. 横隔梁内力计算 …………………………………………………………………………… 27
 5.1 计算荷载……………………………………………………………………………………27
 5.2 横隔梁内力影响线 ……………………………………………………………………… 27
 5.3 横隔梁配筋 ……………………………………………………………………………… 28
   6. 支座的选定 ………………………………………………………………………………… 29 
 6.1 确定支座平面尺寸…………………………………………………………………………29
 6.2 确定支座的厚度……………………………………………………………………………29
 
 6.3 验算支座的偏转情况………………………………………………………………………29
 6.4 验算支座的抗滑稳定性……………………………………………………………………30
 第二部分     下部结构的计算
 1. 设计资料  ……………………………………………………………………………………  31
 2. 盖梁计算 ……………………………………………………………………………………… 31
 2.1 荷载计算…………………………………………………………………………………… 31
 2.2 内力计算   ……………………………………………………………………………… 35
 2.3 截面配筋设计与承载力效核……………………………………………………………… 38
 3. 桥墩墩柱计算……………………………………………………………………………………40
 3.1 荷载计算…………………………………………………………………………………… 40
 3.2 截面配筋计算及应力验算………………………………………………………………… 41
 4. 钻孔灌注桩计算………………………………………………………………………………  41
 4.1 荷载计算…………………………………………………………………………………… 41
 4.2 桩长计算…………………………………………………………………………………… 42
 4.3桩的内力及变位置计算  ………………………………………………………………… 43
 4.4 桩身截面配筋与强度验算  ……………………………………………………………… 44
 4.5 墩顶纵向水平位移验算  ………………………………………………………………… 45
 第三部分    施工方案与概预算设计……………………………………………………………  46
 1工程概况 ……………………………………………………………………………………  46
 2总体施工方案 ………………………………………………………………………………  46
 3施工方法 ……………………………………………………………………………………  46
    4概预算
 结束语
 参考文献
 谢辞
 附录（设计图纸）