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《淳安縣環(huán)湖公路上江埠大橋菱形掛藍(lán)計(jì)算書(shū)(主橋)》由會(huì)員上傳分享,免費(fèi)在線(xiàn)閱讀,更多相關(guān)內(nèi)容在應(yīng)用文檔-天天文庫(kù)。
1、目錄一、荷載····································································2二、掛籃底模平臺(tái)檢算·················································3三、底模平臺(tái)前、后下橫梁檢算······································6四、底模平臺(tái)前、后吊掛檢算·········································8五、內(nèi)滑梁檢算························
2、···································9六、外滑梁檢算·························································10七、前上橫梁檢算······················································12八、菱形構(gòu)架檢算······················································13九、后錨固系統(tǒng)檢算···································
3、················16十、掛籃走行穩(wěn)定性檢算············································17一、荷載1、主梁階段自重:上江埠1號(hào)橋1#~8#墩主梁懸澆節(jié)段長(zhǎng)度分為3m、3.5m和4m三種,其中D1#、D1ˊ#、C1#、C1ˊ#、B1#、B1ˊ#塊(以下統(tǒng)稱(chēng)為1#塊進(jìn)行計(jì)算)主梁為自重最大節(jié)段,節(jié)段長(zhǎng)3m,節(jié)段自重158.55t;D5#、D5ˊ#、C5#、C5ˊ#、B5#、B5ˊ#塊(以下統(tǒng)稱(chēng)為5#塊進(jìn)行計(jì)算)節(jié)段長(zhǎng)3.5m,節(jié)段自重156.7t;D9#、D9ˊ#、C9#、C9ˊ#、B9
4、#、B9ˊ#塊(以下統(tǒng)稱(chēng)為9#塊進(jìn)行計(jì)算)節(jié)段長(zhǎng)4m,節(jié)段自重150.6t。2、單只掛籃各部分重:菱形桁架:6.9t聯(lián)結(jié)系:1.91t前滑板:0.2t后鉤板:0.38t下滑道:2.80t后錨固系統(tǒng):1.50t前上橫梁:2.84t底模平臺(tái)及吊掛系統(tǒng):15.7t底模:3.63t走行滑梁及走行吊掛系統(tǒng):8.3t外膜及支架:13.04t其他(內(nèi)模、安全設(shè)施、施工荷載):3.5t3、掛籃工作系數(shù):0.4二、掛籃底模平臺(tái)檢算掛籃受力最不利的工況取3m、3.5m、4m三種長(zhǎng)度主梁中的腹板厚度及高度最大一塊主梁(即分別為1#、5#、9#)進(jìn)行計(jì)算比較,其余節(jié)
5、段不再作詳細(xì)計(jì)算。1、底模平臺(tái)布置2、底模平臺(tái)縱梁計(jì)算(1#、5#、9#塊)1)、底模平臺(tái)邊縱梁:三根邊縱梁承擔(dān)著箱梁腹板混凝土荷載及底模平臺(tái)部分重量:一側(cè)腹板混凝土荷載:(見(jiàn)上斷面圖中陰影部分自重)后端斷面荷載:G后=146.12KN/m、118.04KN/m、92.3KN/m前端斷面荷載:G前=138.58KN/m、111.02KN/m、86.32KN/m(前進(jìn)方向?yàn)榍岸耍╉懦蛑亓?、施工荷載及掛籃底模平臺(tái)重量,取混凝土重量的0.4倍考慮:G后=204.57KN/m、165.26KN/m、129.22KN/mG前=194.01KN/m、1
6、55.43KN/m、120.85KN/m該重量由三根邊縱梁承受則每根荷載:q后=68.19KN/m、55.09KN/m、43.07KN/mq前=64.67KN/m、51.81KN/m、40.28KN/m計(jì)算模型見(jiàn)下圖:縱梁截面:A=8412mm2,Ix=237000000mm4,W=1185000mm3計(jì)算結(jié)果:最大彎曲應(yīng)力:=140.62MPa;最大變形:f=8.2mm,f/L=8.2/5000=1/610<1/500(滿(mǎn)足);支座反力(下橫梁所受壓力):R后=123472N、105337N、85870N,R前=79370N、85290N、
7、84382N。2)、底模平臺(tái)中縱梁:混凝土底板下4根縱梁承擔(dān)著箱梁底板及底模平臺(tái)的一部分重量:后端斷面荷載:G后=109.2KN/m、87.4KN/m、66.8KN/m前端斷面荷載:G前=103.5KN/m、81.6KN/m、62.1KN/m(前進(jìn)方向?yàn)榍岸耍╉懦蛑亓俊⑹┕ず奢d及掛籃底模平臺(tái)重量,取混凝土重量的0.4倍考慮:G后=152.88KN/m、122.36KN/m、93.52KN/mG前=144.9KN/m、114.2KN/m、86.9KN/m該重量由4根中縱梁承受,則每根荷載:q后=38.22KN/m、30.69KN/m、23.4
8、8KN/mq前=36.2KN/m、28.6KN/m、21.7KN/m計(jì)算模型見(jiàn)下圖:縱梁截面:A=8412mm2,Ix=237000000mm4,W=1185000