下载后可任意编辑摘 要本设计为桥梁工程设计，首选根据地勘资料，拟定了三个比选方案，然后根据施工要求和经济效益，采纳了（6x35）m 先简支后连续预应力小箱梁桥为最佳方案，并初步拟定结构尺寸，然后利用桥梁博士软件进行全桥安全性验算，根据验算结果对结构尺寸进行优化，最后得到符合法律规范要求和设计任务的设计结果。关键词：桥梁工程；先简支后连续；小箱梁；安全性验算；法律规范ABSTRACTThis bridge engineering design. First of all, the choice according to geological exploration data, proposed three ratio, and then according to the construction requirements and economic benefits, using the (6x35) metres Simply supported continuous prestressed box girder bridge as the best solution, and to structure size, and then use bridge bridge safety and checking calculation of Dr Software, optimize the structure size, according to the calculation results have finally come to conform to the requirements of the specification and the design of the design task results. Key words: bridge engineering; Simple-support before continuous; Small box girder; Checking safety; Specifications命运如同手中的掌纹，无论多曲折，终掌握在自己手中==============================================================下载后可任意编辑第一章 项目概况1.1 项目位置余屋桥位于东莞市东城区，东引运河 B 段，桥梁轴线与规划河道中线交点处的水利桩号为 21+224。桥梁区域位置参见下图。图 1.1 余屋大桥区域位置示意图1.2 项目规模余屋大桥上跨寒溪河。桥梁起终点桩号分别为：K0+047.510~K0+266.610，全桥总长 219.1m，桥梁宽度为 13m，桥梁面积约 2843.3㎡。命运如同手中的掌纹，无论多曲折，终掌握在自己手中============================================================== 下载后可任意编辑第二章 工程地质及水文地质2.1 地形地貌工程场地位于东莞市东城区余屋村，交通便利。设计桥梁横跨寒溪河，其两侧分布有鱼塘等，地形较平坦。勘察期间测得各钻孔孔口高程介于 2.03～6.24m 之间，高差为 4.21m。拟建场地覆盖土层主要为第四系人工填土层、第四系冲积地层、震旦系基岩残积层，基...
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