关 键 词：

株洲 建宁 大桥 施工图 设计

资源描述：

株洲建宁大桥第2联施工图设计,株洲,建宁,大桥,施工图,设计

内容简介：

3。人行33株洲建宁大桥第2联施工图设计摘要本设计为株洲建宁大桥第2联施工图设计，首先根据该桥第2联基本地形地质条件，严格按照任务书要求，拟定本设计桥梁总跨径为 275m。由于此桥位地势平坦且无通航要求，依据公路桥梁设计相关规范，选择 555m 等截面连续梁桥， 80m+115m+80m 变截面连续梁桥和75m+125m+75m的连续刚构桥三个方案进行方案比选。经综合比较，尽管各个方案都有优势，但等截面连续梁桥在设计计算以及施工难度上有明显的优势，因此该桥选择555m等截面连续梁桥作为本次设计的桥型方案，截面形式为箱型截面。桥面宽度26m，双幅，双向六车道，两边各设一个人行道。设计荷载等级为：公路1级。设计车速为60-80km/h，桥面横坡设置为1.5%。主梁和横隔板均采用C50混凝土，容重取25kN/m道、栏杆和中央隔离带采用C30混凝土，容重取25kN/m。桥面铺装用10cm厚的防水沥青混凝土，容重取23kN/m。其次，本设计采用桥梁电算软件 Midas Civil 为主要设计软件，且只做单幅（由于左幅和右幅结构设计相同）计算。施工方法采用逐孔施工法，整个施工过程共分为 6个施工阶段。考虑到施工过程，主梁 Midas 模型划分了80个单元、81个节点,其中支座节点号分别为1,17,33,49,65,81。通过模拟整个施工过程，运行计算得出承载能力极限状态、 正常使用极限状态作用短期效应组合以及长期效应组合的弯矩、剪力包络图。最后，根据短期效应组合弯矩包络图，按抗裂性要求估算预应力筋，再将估算数据予以调整输入 Midas 进行验算。经过反复调整，最终确定预应力筋的配置。本设计主要进行施工阶段法向压应力验算、受拉区钢筋拉应力验算、使用阶段正截面压应力验算、使用阶段斜截面主压应力、使用阶段正截面抗裂验算、使用阶段正截面抗弯验算，且均可满足规范要求。由于时间较为仓促，故未计算竖向预应力筋和普通钢筋的用量，因此未考虑斜截面抗剪的验算。结合总体验算结果，可判定本设计合理，符合设计要求.关键词：等截面连续梁；荷载；主梁；桥面铺装；箱型截面；方案比选。株洲建宁大桥第2联施工图设计ABSTRACTThe design for the second Zhuzhou Jianning bridge linked the constructiondrawing design, first according to the bridge in second basic topographic andgeologicalconditions,instrictaccordancewiththerequirementsofthedevelopmentofthedesigntaskbook,totalspanis275m.Becausethebridgeflatterrainandnonavigationrequirements,basedonthehighwaybridgedesignspecification,selectionof 555m continuous beam bridge, 80m + 115m + 80m variable cross sectioncontinuousbeambridgeandthe75m+125m+75mcontinuousrigidframebridgethree solution schemes. Through comprehensive comparison, despite the variousschemeshavetheadvantage,butthecontinuousbeambridgehasobviousadvantagesin the design calculation and construction difficulty, therefore the bridge 555mcontinuousbeambridgeasabridgeinthisdesign,thesectionformofboxsection.The bridge deck width of 26m, twin, two-way six lane, both sides of a sidewalk.Designloadlevel:Highway1.Designspeedof60-80km/h,decktransverseslopeissetto1.5%.ThegirderanddiaphragmareusedC50concrete,bulkdensityof25kN/m3. The sidewalk, railings and the central isolation belt using C30 concrete, bulkdensityof25kN/m3.Bridgedeckwaterproofasphaltconcrete10cmthick,densityof23kN/m3.Secondly, the design adopts bridge computerization software Midas Civil todesignsoftware,andonlyone(theleftandrightstructuredesigncalculationofthesame).Theconstructionmethodofholebyholeconstructionmethod,theconstructionprocessisdividedinto6stagesofconstruction.Consideringtheconstructionprocess,theMidasmodelisdividedinto80units,81nodes,whereinthesupportnodenumber1,17,33,49,65,81. Through the simulation of the whole construction process,calculating the bearing capacity limit state, normal use limit state function of theshort-termeffectandlong-termeffectofcombinedbendingmoment,combinedshearenvelopeoperation.Finally, according to the short-term effects of combined bending momentcontinuousbeam;load;maingirder;bridgedeckpavement;box株洲建宁大桥第2联施工图设计envelopediagram,accordingtotherequirementofcrackingresistanceestimationofprestressedtendons,andtheestimateddatatoadjusttheinputMidaschecking.Afterrepeatedadjustment,ultimatelydeterminetheprestressedtendonsconfiguration.Thedesignofthemainconstructionmethodtostresschecking,tensilesteelstresscheck,usenormalsectioncompressivestresscalculation,usingthestageofobliquesectionoftheprincipalcompressivestress,theusephase,usephasecalculationofnormalsection crack resistance of flexural calculation, and can meet the specificationrequirements. Because the time is hasty, so no calculation of vertical prestressedreinforcement and common reinforce