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高速改扩建中互通立交改建方案研究

来源:化拓教育网
一24 北 方 交 通 2014年第12期 4 方案确定 社会影响的动迁,保障周边群众良好的生活工作环 境,以及便捷的使用立交上下高速公路,选择方案二 结合上述各方案分析,将五个方案主要指标及 弊端整理如表3: 表3 (即铁岭立交按照原位扩建、改善部分匝道指标、优 化平交口交角)为推荐方案。 9 5 9 5 ∞枷回瑚印猢 5 结束语 随着高速公路改扩建项目的逐渐增多,互通立 交改扩建存在的问题逐渐凸显。互通立交改扩建既 方案一 180 66 0 技术指标偏低 要充分利用原有立交区用地及匝道,又要对立交指 标和规模进行改造提升,但受制于出行习惯、密集建 筑物的动迁量和较高的工程造价,改建立交比新建 立交方案选择需要考虑更多、更复杂的因素。本文 7Y; ̄- 方案三A 方案三B 方案三C 250 280 320 290 70 70 70 70 5279.6 8724.7 1969.2 造价稍高,动迁较多 动迁难度大 距离居民区过 近,污染严重 以一座改建立交为例,详细叙述了方案选择时的各 项注意事项及主要思路,希望能对后续相关项目提 7300.8 造价高,距离 城区稍远 供一定的参考。 经综合比选,为保证车辆运营安全,避免有较大 Study on Reconstruction Plan of Grade——separated Interchanges in Highway Betterment and Addition G' 一zhen Abstract During highway betterment and addition,improvement and scale expansion is needed for grade— separated interchanges.But,confined by travel habits,removal and relocation of crowded buildingsand high ,construction cost,the selection of grade—separated interchanges reconstuctrion plan is more complicatedNotes for .attention and main idea during plan selection are described in details combining with practical engineering project. Key words Grade—separated interchanges;Betterment and addition;Plan selection ”—’一”+”—— ”—- ”+“+”+-・+”+--+”+ ”+・・+n+”+“+“+“+ (上接第20页) Research on Diaphragm of Prestressed Concrete Simply Supported Sloped T Beam ZHAO Zhi—guo Abstract Taking 24.5m integral type subgrade 30m prestressed concrete simply supposed sloped T beam as example,establishing ifnite element model against sloped T beam with the angle larger than 30。by using Midas Civil 2012 and analyzing the internal force distribution of main beam and Diaphragm under the four models. conclusion has been made as follows:the peak midspan positive bending moment of main beam declines and moves to obtuse angle side as the angle grows bigger;midspan positive bending moment of mid cross beam increases signiifcantly as the angle grows bigger and when the mid CROSS beam adds up to fivethe difference value of positive ,bending moment of each diaphragms will decline. Key words Prestressed concrete simply supported T beam;Diaphragm;Internal force;Deflection 

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