Iyo Zhongtang Bridge iri pa xx mugwagwa mukuru ine nzvimbo huru ye 32.5 + 4 × 45 + 32.5m uye yakaenzana chikamu chakasimbiswa yakasimbiswa kongiri inoenderera bhokisi girder (post-tensioning nzira), nehurefu hwakazara hwe245.9m. Bhokisi girder ikamuri imwe chete, kureba kwedanda pakati i308.25cm, denga rakafara 1100cm (hupamhi hwebhiriji dhizaini 12m), uye yepasi ndiro yakafara 480cm. Dandemutande rakarerekera, uye chinhambwe chepakati chepamusoro ndiro 570cm. Danda rinopera uye pakati pedanda rese rinopihwa matanda, uye mamwe akapihwa diaphragms 15m yega.
Nheyo yepier yebhiriji guru ndeye 4 bored cast-in-place piles ine dhayamita ye 120cm, iyo yakanyudzwa mudombo kweinopfuura 50cm. Muviri wepier unotora kaviri-column chimiro chekongiri yakasimbiswa ine dhayamita ye180cm.
Kana zambuko ramiswa, nzira yeSSY inoshandiswa, kureva kuti, nzira yekusundidzira yakawanda inoshandiswa kumisa danda. Hunhu hweiyi nzira ndeiyi: iyo yakachinjika kuita simba kana uchisunda (kudhonza) danda remutumbi rinoparadzirwa uye richiita pane imwe neimwe pier, uye kusunda (kudhonza) kushanda kunogona kudzorwa nechepakati. Sezvo pasina mapira enguva pfupi panguva yebasa, kumucheto kwepamberi kwebhokisi girder kunobatanidzwa kune 30m-yakareba yakagadzirwa simbi truss segwara rekutungamira.
Kana bhanhire rebhokisi rakagadzirwa richisimudzwa kumusoro, rinoitwa mudenderedzwa zvinoenderana nematanho ekufambisa → kusimudza danda → kudonhedza danda → propulsion. Mufananidzo 1 unoratidza nyaya yekutenderera.
Dhiagiramu yekusimudzira-up maitiro
1——Vertical Cylinder;2——Dhonza Musoro;3——Slideway;4——Pulling Rod;5——Horizontal Cylinder
Zvinogona kuoneka kuti kuona kutenderera kwechirongwa ichi, silinda yakachinjika inopedzisa chiito chekusundira bhokisi girder kuburikidza nemudziyo wekutsvedza, uye silinda yakamira inopedzisa chiito chekusimudza nekudonhedza danda. Kureva kuti, silinda yakachinjika uye silinda yakatwasuka inoitwa neimwe nzira.
1. Hydraulic system ye-multi-point pusher danda uye kutonga kwayo
Ose ari maviri silinda yakachinjika uye silinda yakatwasuka inofambiswa ne hydraulically uye inodzorwa nemagetsi. Hurefu hwese hwebhokisi girder rinosaidzirwa bhiriji i225m, uye imwe neimwe mutsara mita inorema 16.8t, nehuremu hwakazara hunosvika 3770t. Naizvozvo, husero hwemasilinda gumi akachinjika uye 24 vertical cylinders (mafuta emafuta ari 320kg/cm2 uye kubuda kuri 250t) akarongwa. Kune 5 piers ane horizontal humburumbira, 2 imwe neimwe pier; kune 6 piers yemasilinda akasimukira, 4 papier yega yega.
Iyo vertical jack inopedzisa kusimudza uye kudzikisa danda. Mukuita kwekuvaka, bhiriji rese harifanirwe kuwiriraniswa, uye mapier anofanirwa kukamurwa, saka hapana dambudziko rekutonga kwepakati. Kudzora kwayo kwemagetsi kunogona kupedzisa kusimudza kuenderera kana kudzikisa jack, uye zvakare inogona kuzadzisa iyo jog fomu.
Iyo horizontal jack inopedzisa danda kusunda chiito. Nzira yekuvaka inoda kuti bhiriji rose rive rakafanana, kureva kuti, kubuda kana kumira panguva imwe chete, saka iyo yepakati pekutonga yejeki yakakomberedzwa inogadziriswa, uye bhokisi remagetsi repakati rinogadzirirwa chinangwa ichi.
Kushandiswa kwemajasi akatwasuka uye vertical jacks ari kuwedzera zvishoma nezvishoma, uye bhokisi girder rakagadzirirwa 15m per cycle. Nekuenderera mberi kwekukura kwebhokisi girder, nhamba yejacks inoshandiswa zvishoma nezvishoma inowedzera. Mumazuva mashomanana ekupedzisira ekugadzirisa, ose e10 seti horizontal jacks uye 24 vertical jacks anoshandiswa.
Kuti tibatanidze pier yega yega nekamuri yepakati yekudzora, takaisa intercom inonzwika kufambisa system. Kudzidzira kwakaratidza kuti iyo hydraulic transmission system uye nzira dzekudzora dzakanyorwa pamusoro dzakavimbika kushandisa.
Ngatitaurei nezve zvimwe zviitiko zvematambudziko akati wandei eiyo hydraulic transmission yepush frame beam nzira yekutarisa.
1. Dambudziko re graded pressure regulation ye hydraulic system. Dambudziko rekugadzirisa nhanho-ne-nhanho rinoiswa mberi nekuda kwekufunga kwakasiyana kweiyo static friction resistance uye dynamic friction resistance apo girder yebhokisi inofamba. Munguva yakapfuura, yaigara ichitendwa kuti iyo hydraulic system inofanira kuva nemafuta maviri kana matatu: kana static friction resistance inokundwa, kushandiswa kwemafuta makuru kunoshandiswa; uye diki diki dzvinyiriro yemafuta inoshandiswa kana bhokisi danda rinotsvedza. Iyo nzira ndeyekushandura iyo hydraulic system nekubatanidza mavharuvhu ekuyamura akasiyana akaiswa. Nenzira iyi, iyo hydraulic system uye kutonga kwayo kwakanyanya kuoma. Tsika yedu yakaratidza kuti kudzvanywa kwemafuta eiyo hydraulic system hakutsamiri pachezvayo, asi pakupikisa kwekunze kwejack. Kureva kuti, kana iyo hydraulic system iri kushanda, kudzvanywa kwemafuta ayo hakutariswe nehuwandu pane zita rezita repombi yemafuta, asi nekupokana kwese kwakasangana panguva yekuyerera kwemafuta kudzokera kutangi remafuta mushure mekusiya pombi. . Kana jack isina kupikisa (mutoro), kudzvinyirira kwepombi yemafuta kunongogadziriswa nekupikisa kwepombi; kana mafuta kubva papombi yemafuta pakarepo achipinda mumhepo kana tangi yemafuta, kumanikidzwa kwepombi yemafuta kuchava zero; kana kushorwa (mutoro) R yejack inowedzera, kudzvanywa kwepombi yemafuta kwakawedzerawo. Apo jack inosunungurwa, kudzvinyirirwa kwepombi yemafuta kunotarirwa nevhavha imwe-nzira; apo jack inotakurwa, kudzvinyirirwa kwepombi yemafuta, ndiko kuti, kudzvinyirira kwemafuta ehurongwa, kuchagadziriswa nekupikisa kwejack. Kutsikirirwa kwemafuta kubasa kunotsanangurwa nejack load. Izvi zvinoreva kuti, mafuta ekumanikidzwa kwe hydraulic system achazvishandura pachayo nekupikisa kwekunze, saka nhanho-nhanho-nhanho yekumanikidza mutemo haikoshi.
2. Sync nyaya yehorizontal jacks. Kusundidzira kunoda kuti jeko rekuruboshwe nekurudyi rakachinjika risundire danda mberi nekumhanya kwakafanana, zvikasadaro danda rinotsvedza kana ratsvedza. Ehe, chinhu chekutanga chinotariswa nevanhu ndechekuti simba rinoshandiswa nekuruboshwe nekurudyi horizontal jacks kumutumbi wedanda kunofanirwa kuenzana, izvo zvakarurama. Kana symmetry yekuruboshwe nekurudyi yemuviri wedanda yakanakisa, uye kushorwa kwakaenzana nekuruboshwe uye kurudyi, hongu, simba rinoshandiswa nekuruboshwe uye kurudyi horizontal jacks rinofanirawo kuenzana. Chechipiri chekutarisa ndechekuti kuruboshwe uye kurudyi kumberi kumhanya kunofanirwawo kuenzana. Nenzira iyi, danda rinogona kufamba zvakanaka uye rakatwasuka. Zvisinei, zvakaoma kumutumbi wedanda kuti uone kuti chikamu chimwe nechimwe chinofanira kunge chakanyatsoenderana kuruboshwe uye kurudyi, uye kuramba kuruboshwe uye kurudyi kunofanira kuenzana. Kutsikirirwa kwemafuta kwakabatana nehurongwa hwataurwa pamusoro apa kunotsanangurwa nekupikisa kwekunze. Zvinogona kufungidzira kuti majaki ekuruboshwe nekurudyi anofanirwa kushanda pasi pemamiriro akasiyana-siyana emafuta, saka iko kumhanya kwejaki kuruboshwe nekurudyi kuchawiriraniswa panguva ino? Nekuda kwemuenzaniso, zvinofungidzirwa kuti peya imwe chete yejeki yepier imwe iri kushanda. Sezvo isu takaseta pombi imwe nejeki imwe, izvi zvinogadzirisa dambudziko rekumhanyisa kuwiriranisa zvakanyanya. Nekuti pombi yemafuta yatinoshandisa ndeyehuwandu hwakanaka hwepombi yekufambisa, muchirevo, zvisinei kuti mafuta anobuda nepombi yemafuta akasangana sei (kureva kuti, zvisinei kuti mafuta ehurongwa akakwira zvakadii), chiyero chekuyerera kwayo. isina kushanduka. Naizvozvo, kuruboshwe uye kurudyi jacks dzinofanirwa kuwiriraniswa. Hongu, mhedziso iyi inogona zvakare kuverengerwa kumamiriro emapier maviri ane matop mana, matatu ane misoro mitanhatu, mapiji mana ane matop sere, kana mashanu matop gumi. Naizvozvo, nzira yedu yepombi imwe uye imwe yepamusoro inogona kuona zviri nani dambudziko rekuruboshwe uye kurudyi kuwiriranisa. Kudzidzira kwakaratidzawo kuti mupuranga rekusundidzira, mutsara wepakati webhokisi danda harina kudzikisira (kunyatso kutaura, rinofanirwa kumiswa zvishoma kubva kuruboshwe kuenda kurudyi asi rinogona kugara rakachengetwa mukati meimwe tambo). Nzira yekuvaka inoda kunyatsotariswa kwekutsauka kwemutsara wepakati. Kana ichipfuura 2cm, inoda kugadziriswa (ine lateral kutungamira). Munguva yekusimudzira-up, nhamba yekururamisa idiki kwazvo. Kamwechete kana kaviri mukusundidzira makumi matatu (15m box girder). Izvi zvinogona kutariswa semhedzisiro yakasanganiswa yezvinhu zvakawanda zvinovavarirwa, nekuti nezve hydraulic muchina, pombi yemafuta ine chikanganiso chekuyerera, jack ine matambudziko emukati ekudonha (jeki yega yega yakasiyana, uye piston inogona kunge iri munzvimbo dzakasiyana. ), uye iyo system Leakage yemamwe maturusi mukati, nezvimwewo, izvo zvisingapokane nemhedziso yedu pamusoro.
3. Sync nyaya ye vertical jacks. Yedu vertical jacks inoshanda nepombi ine majeki mana, uye vharafu yekuwiriranisa inofanirwa kumisikidzwa, nekuti iyo synchronizing vharafu (kana diverter vharafu) inogona kugadzira akati wandei majeki pasi pemitoro yakasiyana (kupokana) ichiri kuwana reshiyo yakafanotemerwa kana yakaenzana mafuta ekupa kuti awane. synchronization. Asi tichifunga kuti vharuvhu inoyananisa ine maburi maviri chete. Kuti urerutsa chimiro chegadziriro, hapana valve yekubatanidza inoiswa. Tichifunga kuti zviremera zvekuruboshwe uye kurudyi zvebhokisi girder zvine symmetrical, haisi dambudziko guru kuita kudaro. Kudzidzira kwakaratidza kuti fungidziro ndeyechokwadi, jack yakatwasuka inosimuka nekudonha zvakaenderana, uye hapana dambudziko mukusimudza nekudonha kwedanda.
Nguva yekutumira: May-16-2022