36
DOI;10. 7672/sgjs2015170036
施工技
术
CONSTRUCTIONTECHNOLOGY
2015年9月上第44卷第17期
高架区间上跨济广高速桥施工方案模糊比选
王国富，胡永利，路林海
（济南轨遗交通集团有限公司，山东济南
250101）
【摘要】以济南轨道交通R1线高架段80m+130m+80m预应力混凝土连续桥上跨济广高速桥施工方案扶择向题为背景，简要介绍了工程概况、转体施工方案和悬臂浇筑方案的实施步骤及各自特待点、模榭比选方法的计算步骤，对转体施工方案和悬臂瓷筑方案的施工难度、安全风险等定性指标进行合理赋值，与已知的工程造价、施工工期、对济广高速影响时间等定量指标一并标准化处理，并对定性指标和定量指标分别进行对比，以确定相应指标的权重。
【关键调】桥聚工程；转体施工；悬臂浇筑；模糊比选；方案
【中图分类号】U239.5
【文献标识码】A
【文章编号】1002-8498(2015)17-0036-04
FuzzyComparisonofConstructionSchemesforElevatedSectionover
Ji'nan-Guangzhou Highway Bridge
Wang Guofu,Hu Yongli,Lu Linhai
(Ji'nan Rail Transit Group Co. , Lad. ,Ji'nan,Shandong
250101,China）
Abstract: The construction scheme choice problem of 80m +130m + 80m prestressed concrete continuous bridge on Ji' nan metro line R1 which is over Ji'nan-Guangzhou highway bridge is taken as background, engineering situation is introduced in brief, as well as implementation steps along with characteristics of rotation construction method and cantilever pouring construction method, calculation steps of fuzzy comparison. Qualitative indexes such as construction difficulty and safety risk of rotation construction method and cantilever pouring construction method are given with reasonable assignment, which are standardized with known quantitative indexes such as engineering cost, construction period, influence time on Ji' nan-Guangzhou highway. The qualitative indexes and quantitative indexes are compared respectively, so as to confirm the weight of corresponding indexes.
Key words:bridges;rotation construction;cantilever pouring;fuzzy comparison;schemes
1工程背景 1.1工程概况
济南轨道交通R1线连接长清与济南西站，全长26.4km，高架段长18.00km，地下段长8.40km，其中R1线在高架段紫薇路站一赵营站区间上跨济广高速桥。济广公路现状为双向4车道，桥宽28m，远期双向将拓宽为8车道，即在既有高速公路两侧各拓宽2车道，远期桥宽考惠为7.5+28+7.5= 43m，R1线与济广高速的斜交角为24°，R1线与济广高速的平面关系如图1所示。综合考虑现场情况、线路平织面设计、施工对高速交通影响等因素，
*山东省住房和城乡建设厅资助项日（鲁财建指[2014]139号【作者第介】王国高，量事长，博士，教授级高级工程师， E-mail;metro_jinan@126.com
【收稿日期】2015-04-25 万方数据
轨道交通R1线上跨济广高速采用80m+130m+ 80m预应力混凝土连续梁，拟建连续桥与济广高速
的平面关系如图2所示。 1.2施工方案
80m+130m+80m预应力混凝土连续梁可采用转体施工方案和悬臂浇筑方案进行施工。其各自施工步骤介绍如下。
转体施工方案
1.2.1
在济广高速两侧分别在满堂支架上现浇64m+ 64m的T构，待强度达到设计要求后两侧T构对称转体，转体完成后按照先边跨后中跨的顺序施工合龙段，最后施加二期荷载。转体施工如图3所示，各阶段的施工步骤为：①施工桥梁基础及下部结构； ②搭设支架，在济广高速桥两侧，平行济广高速桥现浇2×64m上部结构，待现浇结构达到设计强度