鄂黄高速公路30米预应力混凝土简支箱梁桥设计毕业设计

湖北工业大学毕业设计（论文）

摘 要

鄂黄高速公路桥梁初步设计为30m的预应力混凝土简支箱形梁桥。该桥采用四车道布置。上部为装配式部分预应力混凝土简支箱梁。预制箱梁高1.6m，主梁间距3.2m。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4mm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1.4m；桥墩基础为单排双列钻孔灌注桩基础，桩径1.6m。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7.6m。 关键词：预应力混凝土简支梁；箱梁； 桩基础； 桥梁

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湖北工业大学毕业设计（论文）

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 1.6m, the girder’s span length is 3.20m. 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 1.4m; Pier’s bedrock for single line double row drill hole irrigation pile foundation, stake’s diameter is 1.6m. 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 7.6m.

Keywords：Prestressed Concrete Simple Beam， Box girder；Pile foundation；Bridge

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湖北工业大学毕业设计（论文）

目 录

目 录 ------------------------------------------------------------------- 1` 摘 要 ------------------------------------------------------------------- 1 ABSTRACT ------------------------------------------------------------------ 2 1.绪论 -------------------------------------------------------------------- 1 2.设计基本资料 ------------------------------------------------------------ 2 2.1 设计资料 ---------------------------------------------------------------- 2 3.上部结构计算设计资料及构造布置 ------------------------------------------ 4 3.1 桥梁纵向布置 ------------------------------------------------------------ 4 4.2 横断面布置 -------------------------------------------------------------- 4 4.3计算截面几何特征 -------------------------------------------------------- 5 5．主梁作用效应计算 ------------------------------------------------------- 8 5.1永久作用效应计算 -------------------------------------------------------- 8 5.2 可变作用效应计算 -------------------------------------------------------- 9 5.3预应力钢束的估算及其布置 ----------------------------------------------- 16 6.主梁截面几何特性计算 --------------------------------------------------- 23 7.钢束预应力损失估算 ----------------------------------------------------- 26 8.持久状况截面承载力极限状态计算 ----------------------------------------- 32 8.1正截面承载力计算 ------------------------------------------------------- 32 8.2斜截面承载力计算 ------------------------------------------------------- 33 8.3斜截面抗弯承载力计算 --------------------------------------------------- 34 9.应力验算 --------------------------------------------------------------- 35 9.1短暂状况的正应力验算 --------------------------------------------------- 35 9.2持久状况的正应力验算 --------------------------------------------------- 36 10.抗裂性验算 ------------------------------------------------------------ 40 10.1作用短期效应组合作用下的正截面抗裂验算 -------------------------------- 40 10.2作用短期效应组合作用下的斜截面抗裂验算 -------------------------------- 40 11.锚固区局部承压验算 ---------------------------------------------------- 43 11.1局部承压区的截面尺寸验算 --------------------------------------------- 43 11.2局部抗压承载力验算 ---------------------------------------------------- 43 12.主梁变形验算 ---------------------------------------------------------- 45 12.1使用阶段的挠度计算 ---------------------------------------------------- 45 12.2预拱度设置 ------------------------------------------------------------ 46 13.横隔梁计算 ------------------------------------------------------------ 47 13.1跨中横隔梁的作用效应影响线 -------------------------------------------- 47 13.2截面作用效应计算 ------------------------------------------------------ 49 13.3截面配筋计算 ---------------------------------------------------------- 50 14.行车道板计算 ---------------------------------------------------------- 51 14.1悬臂板荷载效应计算 ---------------------------------------------------- 51 14.2连续板荷载效应计算 ---------------------------------------------------- 52

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湖北工业大学毕业设计（论文）

14.3板面配筋 -------------------------------------------------------------- 54 14.4.抗剪验算 -------------------------------------------------------------- 55 15.双柱式桥墩和钻孔灌注桩的设计资料 -------------------------------------- 56 16.盖梁计算 -------------------------------------------------------------- 57 16.1 荷载计算 -------------------------------------------------------------- 57 16.2 内力计算 ------------------------------------------------------------- 65 16.3盖梁各截面的配筋设计与承载力校核 -------------------------------------- 68 17. 桥墩墩柱计算 --------------------------------------------------------- 73 17.1 荷载计算 ------------------------------------------------------------- 73 17.2 截面配筋计算及应力验算 ------------------------------------------------ 75 18钻孔灌注桩 ------------------------------------------------------------- 78 18.1 荷载计算 -------------------------------------------------------------- 78 18.2 桩长计算 ------------------------------------------------------------- 79 18.3桩的内力计算（M法） --------------------------------------------------- 80 18.4桩身截面配筋与强度验算 ------------------------------------------------ 83 18.5墩顶纵向水平位移验算 -------------------------------------------------- 85 19 施工方法 -------------------------------------------------------------- 87 19.1 基础施工 ------------------------------------------------------------- 87 17.2 箱梁预制及安装 -------------------------------------------------------- 88 19.3 桥面板施工 ------------------------------------------------------------ 94 19.4 桥梁伸缩缝 ----------------------------------------------------------- 94 参考文献 ----------------------------------------------------------------- 95 致谢 --------------------------------------------------------------------- 96

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