蔡家坡橋施工圖設(shè)計(jì)
蔡家坡橋施工圖設(shè)計(jì),蔡家坡橋,施工圖,設(shè)計(jì)
蔡家坡橋施工圖設(shè)計(jì)
摘要
本設(shè)計(jì)為蔡家坡橋施工圖設(shè)計(jì)，其主要設(shè)計(jì)內(nèi)容及過(guò)程如下：首先，根據(jù)蔡
家坡基本地形地質(zhì)條件，嚴(yán)格按照設(shè)計(jì)書(shū)要求，擬定本設(shè)計(jì)橋梁總跨徑為120m。
由于此橋位于一個(gè)水庫(kù)上游且無(wú)通航要求，根據(jù)公路橋梁設(shè)計(jì)相關(guān)規(guī)范，選擇3
*40m等截面簡(jiǎn)支梁橋和3*40m等截面連續(xù)梁橋進(jìn)行比選方案。經(jīng)綜合比較，盡
管兩者各有優(yōu)勢(shì)，但等截面連續(xù)梁比簡(jiǎn)支梁更穩(wěn)定，通車(chē)更順暢，形式更優(yōu)美，
故選用3*40m等截面連續(xù)梁橋作為本次設(shè)計(jì)的橋型方案。考慮到本橋不設(shè)計(jì)人行
道，橋?qū)挷皇呛軐挘驹O(shè)計(jì)橋梁采取單幅設(shè)計(jì)，主梁橫斷面為單箱雙室截面，并
根據(jù)箱形截面要求確定箱梁的細(xì)部尺寸。
其次本設(shè)計(jì)采用橋梁電算軟件Midas Civil 為主要設(shè)計(jì)軟件，且做主梁計(jì)
算。施工方法采用滿堂支架施工，考慮到施工過(guò)程，主梁Midas 模型劃分了48
個(gè)單元、49個(gè)節(jié)點(diǎn)。主梁橫斷面為等截面，通過(guò)模擬整個(gè)施工過(guò)程，運(yùn)行計(jì)算
得出承載力極限狀態(tài)、正常使用極限狀態(tài)、短期效應(yīng)組合及長(zhǎng)期效應(yīng)組合的彎矩、
剪力包絡(luò)圖。
根據(jù)短期效應(yīng)組合彎矩包絡(luò)圖，按抗裂性要求估算預(yù)應(yīng)力筋，再將估算數(shù)據(jù)
予以調(diào)整輸入Midas 進(jìn)行驗(yàn)算。經(jīng)過(guò)反復(fù)調(diào)整，最終確定預(yù)應(yīng)力筋的配置。本
設(shè)計(jì)主要進(jìn)行施工階段法向預(yù)應(yīng)力驗(yàn)算、受拉區(qū)鋼筋拉應(yīng)力驗(yàn)算、使用階段正截
面壓應(yīng)驗(yàn)算、使用階段斜截面主壓應(yīng)力、使用階段正截面抗裂驗(yàn)算、使用階段正
截面抗彎驗(yàn)算，且均可滿足規(guī)范要求。結(jié)合總體驗(yàn)算結(jié)果，可判定本設(shè)計(jì)合理，
符合設(shè)計(jì)要求。
此外，作者通過(guò)對(duì)以上計(jì)算結(jié)果的整理繪制出施工圖，并對(duì)題為《貝利橋段
實(shí)驗(yàn)室負(fù)載測(cè)試和分析》的英文文獻(xiàn)進(jìn)行翻譯。此文提出了兩個(gè)全尺寸的貝利橋
段負(fù)載測(cè)試實(shí)驗(yàn)。在加載中觀察橋面板跨中撓度，并且對(duì)幾個(gè)關(guān)鍵構(gòu)建的軸向應(yīng)
變進(jìn)行了測(cè)定。最后得出貝利橋段的優(yōu)缺點(diǎn)。
關(guān)鍵詞：等截面連續(xù)梁；箱型截面；預(yù)應(yīng)力；施工圖設(shè)計(jì)；驗(yàn)算。
ThedesignofCaijiapoBridgeconstructionplans
Abstract
ThedesignforthedesignandconstructionplansofCaijiapoBridge,themain
design content and the process is as follows: Firstly, according to the geological
conditionsoftheterrainofCaijiapo,instrictaccordancewiththedesignrequirement,
thedesignoftotalspanis120m.Becausethebridgeislocatedinareservoirupstream
andnonavigationrequirements,accordingtotherelevantspecificationsfordesignof
highwaybridges,selectthe3*40msimplesupportedbeambridgeandacontinuous
beam bridge 3*40m schemes. Through comprehensive comparison, although both
havetheiradvantages,butthecontinuousbeamthanthatofsimplysupportedmore
stable,trafficmoresmoothly,morebeautiful,thechoiceof3*40mcontinuousbeam
bridge as a bridge in this design. Considering that the bridge was not designed
pavement,bridgewidthisnotwide,singledesignthedesignofbridgegirdersection
istaken,thesectionofsingleboxdoubleroom,andaccordingtotherequirementof
boxsectionofboxbeamsizes.
Secondly, this design adopts bridge computerization software Midas Civil to
design software, and main beam calculation. The construction method of scaffold
construction,consideringtheconstructionprocess,theMidasmodelisdividedinto48
units,49nodes.Thecrosssectionofthemaingirderisaconstantsection,throughthe
simulationof the wholeprocess of construction,operationtocalculate thebearing
capacitylimitstate,normaluselimitstate,theshort-termeffectandlong-termeffect
ofcombinationofcombinationofbendingmoment,shearforceenvelopediagram.
According to the short-term effects of combined bending moment envelope
diagram,accordingtotherequirementofcrackingresistanceestimationofprestressed
tendons,andtheestimateddatatoadjusttheinputMidaschecking.Afterrepeated
adjustment,ultimatelydeterminetheprestressedtendonsconfiguration.Thedesignof
themainconstructionmethodofprestressed,tocheckthetensilesteelstressofcross
sectionusingphaseforcechecking,pressureshouldbechecked,theuseofoblique
section stage compressive principal stress is section strength calculation of normal
sectioncrackresistance,usephase,usephasebendingcalculation,andcanmeetthe
requirementsofspecification.Withtheexperienceresults,determinethereasonable
design,meetthedesignrequirements.
In addition, by the result of above finishing draw construction plans, and to
translate entitled "testing and analysis" section load Bailey laboratory English
literature.ThispaperpresentstwofullsizedBaileybridgeloadtest.Observationdeck
deflection during loading, and the axial strain were determined by several key
construction.TheadvantagesanddisadvantagesoftheBaileybridge.
Keywords: continuous beam; box girder; prestressed; construction
design;calculation.
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