浅谈T形刚构桥.docVIP

Discussion on T Shaped Rigid Frame Box Girder Structural Characteristics And Construction 浅谈“T”形刚构桥箱梁受力特点与施工 张永海 摘要：盘县红果至两河快速通道竹箐河大桥采用左右分幅设计，半幅宽度为1700cm，全桥跨径为（67+120+67）米的预应力连续刚构梁桥，上部结构采用变截面单箱单室结构，箱梁顶板宽17.0米，底板宽8.0米，翼缘悬臂长4.5米，箱梁高度（梁高以裸箱梁低侧腹板处箱梁顶面到箱梁底面的距离计）在主墩与箱梁相接的根部断面梁高为7.5米，现浇段和合拢段梁高均为3.0米，其余梁底下缘按2.0米次抛物线变化，0号梁段总长13米，与墩身对应的8米范围内等梁高(7.5米)，两边各2.5米范围内位于抛物线上，每个县浇“T”纵向对称划分为13节段，梁段及梁段长从根部至跨中分别人6X3.5m、7X4.5m，节段悬臂节段最大重量2312KN。边、中跨合扰段长均为2m，边跨现浇段长5m，箱梁采用C50混凝土。0号段施???拟在墩顶预埋牛腿支承的托架上进行，预埋牛腿及托架应认真设计验算，保证其有足够的强度及刚度。0号梁段浇筑完后在上面拼装挂篮，悬臂段采用挂篮施工方法进行施工。边跨现浇段采用支架施工，中跨现浇段采用吊架施工。 关键词：竹箐河大桥；箱梁内力特点；挂篮施工； Summary: PanXian HongGo to Two River quickly channel ZuJing River Bridge used around points site design, half site width for 1700cm, full bridge span for (67+120+67) m of prestressed continuous just structure beam bridge, upper structure used variable section single box single room structure, box beam roof wide 17 m, backplane wide 8 m, wing margin hanging arm long 4.5 m, box beam height (beam to nude box beam low side abdominal plate Department box beam top surface to box beam end of surface of distance meter) in main Pier and box beam touches of roots section beam for 7.5 m, Cast-in-place segment and closure section beam average is 3 meters high, remaining beam under margin by 2 m times parabola changes, No. 0, beam paragraph total long 13 m, and Pier body corresponds to of 8 m range within, beam (7.5 m), on both sides the 2.5 m range within is located in threw real line Shang, each county poured t vertical symmetric Division for 13 section paragraph, beam paragraph and the beam long from roots to across in the respectively people 6X3.5m, and 7X4.5m, section paragraph hanging arm section paragraph maximum weight 2312KN. Edge, cross-talk in length 2m side cast long 5m, box girder concrete C50. Construction of Pier top will fit in the embedded, No. 0 bracket support bracket, checking computation of embedded bracket and bracket should be carefully designed to ensure sufficient