【摘要】本设计是根据设计任务书的要求和《公路桥规》的规定,对昆山市珠江路桥进行方案比选和设计的。根据实际桥位处河流的通航要求，结合地形，地貌，地质等条件，并着重选择最好的施工工艺，对四跨预应力混凝土简支梁桥，三跨预应力混凝土T形钢构桥，三跨预应力混凝土连续梁桥等桥式方案进行比选。比较确定预应力混凝土简支梁桥为推荐方案。
昆山市正阳大桥选用预应力混凝土简支梁桥，因为简单梁桥有构造简单，施工方便，施工质量容易保证等优点。对此桥方案也是比较经济合理的，桥长30m+30m+30m+30m。主梁采用T形截面，梁高为等高度，主梁采用预制装配的施工方法。桥墩均采用双柱式桥墩，基础为钻孔灌注桩基础。装配式简支肋梁桥可以节约大量模板支架，缩短施工期限，加快建桥速度，所以广为采用。0.5m（栏杆）+2.0m（人行道）+4.0m（慢车道）+24m（快车道）+4.0m（慢车道）+2.0m（人行道）+0.5m（栏杆）=总宽37m。单向最大纵坡3.5％，双向横坡1.5％。基本地震烈度为751级，按七度设防。桥面铺装：选用8cm厚的防水混凝土作为铺装层，上加6cm的沥青混凝土磨耗层，共计14cm厚。27781
全桥被对称的划分为307个单元，利用电算程序计算恒活载以及各施工阶段内力。然后对内力进行组合，计算后对全桥进行预应力束的配置，经验算可以满足规范要求。
【毕业论文关键词】 简支梁桥；梁格方法；预应力。
The bridge design of zhengyang in kunshan city（Simply supported beam bridge Bridge）
【Abstract of the Project】     
According to graduation design task and the specification of road and bridge，this design compared some different plans. According to the requirements of the actual bridge is located at river navigation, combined with the topography, geomorphology, geological conditions, and focuses on the selection of the best construction process, on 4-span prestressed concrete simply supported beam bridge, three span prestressed concrete T-shaped rigid frame bridge, a three span prestressed concrete continuous girder bridge with the bridge type scheme is selected. The comparison of the prestressed concrete simply supported beam bridge for the recommended plan.
The bridge of zhengyang in kunshan city is exposed to select the prestressed concrete simple support beam bridge, because the simple support beam bridge has the structure simply, the construction conveniet, the construction quality easy to guarantee and so on the merits. The bridge scheme is also economic to relatively reasonable, bridge length 30m+30m+30m+30m. The main beam with T-shaped cross-section, beam height is the height of the main beam prefabricated construction methods. The piers are made of double-column pier foundation bored piles. Simple - supported rib beam bridge can save a lot of template support, shorten the construction period, speed up the construction of a bridge, so widely used. 0.5m (railing) +2.0m (sidewalk) +4.0m (slow lane) +24m (fast lane) +4.0m (slow lane) +2.0m (sidewalk) +0.5m (rail) = total width 37m. One-way maximum longitudinal slope 3.5%, two-way horizontal slope 1.5%. Main earthquake intensity of six grade, press seven degree fortification. The deck pavement: to use 10cm thick waterproof concrete as pavement, plus 8cm asphalt concrete wearing course, a total of 14cm thick.
    The whole bridge pided into 286 units, and the internal force of the whole bridge is calculated by the calculation program. The internal forces are combined, calculated on a whole bridge prestressed beam configuration, experience can  meet the requirements of the specification.
【Key words】 Simply supported bridge; Girder frame method; Prestress.
目录
1 序言    1
2　设计资料    3
2.1　工程概况    3 昆山市正阳大桥设计（简支梁）设计+CAD图纸:http://www.751com.cn/gongcheng/lunwen_22388.html