Njira zothandizira ndi kupewa ming'alu ya konkire mu ngalande yotulutsa kusefukira kwa hydropower station
1.1 Chidule cha polojekiti yotulutsa madzi osefukira a Shuanghekou Hydropower Station mumtsinje wa Mengjiang
Kusefukira kwa madzi osefukira ku Shuanghekou Hydropower Station mumtsinje wa Mengjiang ku Guizhou Province kumatenga mawonekedwe a chipata cha mzinda.Msewu wonse ndi 528 m kutalika, ndipo khomo ndi kutuluka pansi okwera ndi 536.65 ndi 494.2 m motsatana.Pakati pawo, pambuyo pa kusungirako madzi koyamba kwa Shuanghekou Hydropower Station , Pambuyo poyang'anitsitsa pamalopo, anapeza kuti pamene mlingo wa madzi m'malo osungiramo madzi unali wapamwamba kusiyana ndi kukwera pamwamba pa pulojekiti ya plug ya kusefukira kwa madzi, zomangamanga. olowa ndi konkire ozizira mfundo za pansi mbale pansi pa mutu wautali wokhota kutsinde kutulutsa madzi seepage, ndi madzi seepage kuchuluka anatsagana ndi mlingo wa madzi m'dera posungira.kukwera ndi kupitiriza kukula.Pa nthawi yomweyo, madzi seepage imapezekanso kumbali khoma konkire olowa ozizira olowa ndi kumanga mfundo mu ankakonda kutsinde gawo la Longzhuang.Pambuyo pofufuza ndi kufufuza ndi ogwira ntchito oyenerera, anapeza kuti zifukwa zazikulu za kuphulika kwa madzi m'maderawa zinali chifukwa cha malo osauka a miyala ya miyala mu ngalandezi, mankhwala osagwira ntchito a zomangamanga, kubadwa kwa mafupa ozizira panthawi ya Kuthira konkriti, kusamakanizidwa bwino ndi kumera kwa mapulagi a duxun tunnel.Jia et al.Kuti izi zitheke, ogwira nawo ntchito adapereka njira yopangira mankhwala opangira ma grouting pamalo otsetsereka kuti atseke bwino ndikuchotsa ming'alu.
pa
1.2 Chithandizo cha ming'alu mumsewu wotulutsa madzi osefukira a Shuanghekou Hydropower Station mumtsinje wa Mengjiang
Magawo onse osefukira a ngalande yotulutsa madzi osefukira a Luding Hydropower Station ndi opangidwa ndi konkriti ya HFC40, ndipo ming'alu yambiri yobwera chifukwa chomanga madamu opangira magetsi amagawidwa pano.Malinga ndi ziwerengero, ming'aluyi imakhazikika kwambiri pagawo la 0+180~0+600 la damulo.Malo akuluakulu a ming'alu ndi khoma lambali ndi mtunda wa 1 ~ 7m kuchokera pansi pa mbale, ndipo m'lifupi mwake ndi pafupifupi 0.1 mm, makamaka panyumba iliyonse yosungiramo katundu.Gawo lapakati la kugawa ndilofala kwambiri.Pakati pawo, ngodya ya zochitika za ming'alu ndi ngodya yopingasa imakhalabe yaikulu kuposa kapena yofanana ndi 45. , mawonekedwewo ndi osweka komanso osakhazikika, ndipo ming'alu yomwe imatulutsa madzi amadzimadzi nthawi zambiri imakhala ndi madzi ochepa, pamene ming'alu yambiri. zimangowoneka zonyowa pamtunda wolumikizana ndipo ma watermark amawonekera pamwamba pa konkriti, koma pali zizindikiro zochepa zowoneka bwino zamadzi.Palibe madzi oyenda pang'ono.Powona nthawi yakukula kwa ming'alu, zimadziwika kuti ming'aluyo idzawoneka pamene formwork imachotsedwa maola 24 pambuyo pa kutsanulira konkriti koyambirira, ndiyeno ming'aluyi idzafika pachimake patatha masiku 7 pambuyo pa kuchotsedwa. mawonekedwe.Sichisiya kukula pang'onopang'ono mpaka L5-20 d mutatha kugwetsa.
2. Kuchiza komanso kupewa ming'alu ya konkire m'ngalande zotulutsa kusefukira kwa malo opangira mphamvu zamagetsi
2.1 Chemical grouting njira ya spillway ngalande ya Shuanghekou Hydropower Station
2.1.1 Chiyambi, makhalidwe ndi kasinthidwe ka zipangizo
Zomwe zimapangidwa ndi slurry ndi PCI-CW high permeability yosinthidwa epoxy resin.Zinthuzo zimakhala ndi mphamvu zogwirizanitsa kwambiri, ndipo zimatha kuchiritsidwa kutentha, ndi kuchepa pang'ono pambuyo pochiritsidwa, ndipo panthawi imodzimodziyo, zimakhala ndi mphamvu zamakina apamwamba komanso kukana kutentha kwapakati, kotero zimakhala ndi madzi abwino osiya ndi kutuluka- kuyimitsa zotsatira.Mtundu woterewu wolimbikitsira zinthu umagwiritsidwa ntchito kwambiri pokonza ndi kulimbikitsa ntchito zosunga madzi.Kuphatikiza apo, zinthuzi zilinso ndi maubwino osavuta, magwiridwe antchito abwino kwambiri oteteza chilengedwe, komanso osawononga chilengedwe.
pa
2.1.2 Njira zomanga
Choyamba, yang'anani seams ndi kubowola mabowo.Sambani ming'alu yomwe imapezeka mumsewu ndi madzi othamanga kwambiri ndikutembenuza pamwamba pa konkire, ndikuyang'ana chomwe chimayambitsa ming'alu ndi njira ya ming'alu.Ndipo tsatirani njira yophatikizira dzenje lolowera ndi dzenje lobowola.Mukamaliza kubowola dzenje lolowera, ndikofunikira kugwiritsa ntchito mpweya wothamanga kwambiri komanso mfuti yamadzi yothamanga kwambiri kuti muwone dzenje ndi kusweka, ndikumaliza kusonkhanitsa deta ya kukula kwa mng'alu.
Chachiwiri, mabowo a nsalu, mabowo otsekera ndi ma seams osindikiza.Apanso, gwiritsani ntchito mpweya wothamanga kwambiri kuti muchotse dzenje la grouting kuti limangidwe, ndikuchotsani matope omwe aikidwa pansi pa dzenje ndi khoma la dzenje, ndiyeno yikani chotsekereza chotchinga ndikuchiyika pa dzenje la chitoliro. .Kuzindikiritsa ma grout ndi mabowo otuluka.Pambuyo pokonza mabowo, gwiritsani ntchito PSI-130 plugging agent kuti mutseke mabowo, ndikugwiritsanso ntchito simenti ya epoxy kuti mupitirize kusindikiza kutsekeka kwa mabowo.Mukatseka potsegulira, m'pofunika kukumba poyambira 2cm m'lifupi ndi 2cm kuya motsatira kumene mng'alu wa konkriti.Mukamaliza kuyeretsa poyambira ndi kuthira madzi othamanga, gwiritsani ntchito pulagi yofulumira kuti mutseke poyambira.
Apanso, mutayang'ana mpweya wabwino wa payipi yokwiriridwa, yambani ntchito ya grouting.Pa ndondomeko ya grouting, mabowo oblique osamvetseka amayamba kudzazidwa, ndipo chiwerengero cha mabowo chimakonzedwa molingana ndi kutalika kwa ndondomeko yeniyeni yomanga.Pamene grouting, m'pofunika kuganizira bwinobwino grouting chikhalidwe cha mabowo moyandikana.Pamene mabowo oyandikana nawo ali ndi grouting, madzi onse m'mabowo a grouting ayenera kutsanulidwa, ndiyeno agwirizane ndi chitoliro cha grouting ndi grouted.Malingana ndi njira yomwe ili pamwambayi, dzenje lililonse limadulidwa kuchokera pamwamba mpaka pansi ndi pansi mpaka pamwamba.
Njira zothandizira ndi kupewa ming'alu ya konkire mu ngalande yotulutsa kusefukira kwa hydropower station
Pomaliza, grout amatha muyezo.Muyezo wapanikiziro wa mankhwala grouting a ming'alu ya konkriti mu spillway ndi mtengo womwe umaperekedwa ndi mapangidwewo.Nthawi zambiri, kuthamanga kwambiri kwa grouting kuyenera kukhala kochepera kapena kofanana ndi 1.5 MPa.Kutsimikiza kwa mapeto a grouting kumachokera ku kuchuluka kwa jekeseni ndi kukula kwa kuthamanga kwa grouting.Chofunikira chachikulu ndikuti kupanikizika kwa grouting kukafika pamtunda, grouting sidzalowanso dzenje mkati mwa 30mm.Panthawi imeneyi, ntchito yomanga chitoliro ndi kutseka kwa slurry ikhoza kuchitidwa.
Zomwe zimayambitsa ndi njira zochizira ming'alu yamadzi osefukira a Luding Hydropower Station
2.2.1 Kuwunika zomwe zidayambitsa kusefukira kwamadzi ku Luding Hydropower Station
Choyamba, zopangira zimakhala ndi zosagwirizana komanso zokhazikika.Kachiwiri, kuchuluka kwa simenti mu chiŵerengero chosakaniza ndi chachikulu, zomwe zimapangitsa kuti konkire ipange kutentha kwambiri kwa hydration.Kachiwiri, chifukwa chachikulu matenthedwe kukula coefficient ya miyala aggregates mabeseni mtsinje, pamene kutentha kusintha, ndi aggregates ndi otchedwa coagulating zipangizo adzakhala dislocate.Kachitatu, konkire ya HF ili ndi zofunikira zaukadaulo wapamwamba, ndizovuta kudziwa bwino ntchito yomanga, komanso kuwongolera nthawi ndi njira yogwedezeka sikungakwaniritse zofunikira.Kuonjezera apo, chifukwa cha kusefukira kwa madzi osefukira a Luding Hydropower Station amalowa, kutuluka kwamphamvu kwa mpweya kumachitika, zomwe zimapangitsa kutentha kochepa mkati mwa ngalandeyo, zomwe zimapangitsa kusiyana kwakukulu kwa kutentha pakati pa konkire ndi chilengedwe chakunja.
pa
2.2.2 Njira zochizira ndi kupewa ming'alu yotulutsa madzi osefukira
(1) Pofuna kuchepetsa mpweya wabwino mumsewu ndikuteteza kutentha kwa konkire, kuti muchepetse kusiyana kwa kutentha pakati pa konkire ndi chilengedwe chakunja, chimango chopindika chikhoza kukhazikitsidwa potuluka mumsewu, ndipo nsalu yotchinga imatha kupachikidwa.
(2) Pansi pokwaniritsa zofunikira zamphamvu, gawo la konkriti liyenera kusinthidwa, kuchuluka kwa simenti kuyenera kuchepetsedwa momwe kungathekere, ndipo kuchuluka kwa phulusa la ntchentche kuyenera kuonjezedwa nthawi yomweyo, kuti kutentha kwa hydration konkire kumatha kuchepetsedwa, kuti muchepetse kutentha kwa mkati ndi kunja kwa konkire.kusiyana kwa kutentha.
(3) Gwiritsani ntchito kompyuta kuwongolera kuchuluka kwa madzi omwe awonjezeredwa, kuti chiŵerengero cha simenti cha madzi chiziwongoleredwa bwino pakusakaniza konkire.Tikumbukenso kuti pa kusanganikirana, pofuna kuchepetsa kutentha kwa zopangira kubwereketsa, m`pofunika kutengera ndi otsika kutentha.Ponyamula konkire m'chilimwe, kusungunula koyenera ndi njira zoziziritsira kumayenera kuchitidwa kuti muchepetse kutentha kwa konkire panthawi yoyendetsa.
(4) Njira yogwedezeka iyenera kuyendetsedwa mosamalitsa pomanga, ndipo ntchito yogwedezeka imalimbikitsidwa pogwiritsa ntchito ndodo zosinthika za shaft zokhala ndi ma diameter a 100 mm ndi 70 mm.
(5) Yang'anirani mwamphamvu liwiro la konkriti kulowa m'nyumba yosungiramo katundu, kuti liwiro lake likukwera lochepera kapena lofanana ndi 0.8 m / h.
(6) Wonjezerani nthawi yochotsa konkire kufika nthawi imodzi pa nthawi yoyambirira, ndiko kuti, kuchokera pa 24 h mpaka 48 h.
(7) Mukatha kuthyola fomuyo, tumizani antchito apadera kuti agwire ntchito yokonza kupopera mbewu mankhwalawa panthawi yake.Madzi osamalira ayenera kusungidwa pa 20 ℃ kapena pamwamba pa madzi ofunda, ndipo pamwamba pa konkire ayenera kukhala onyowa.
(8) Thermometer imayikidwa m'nyumba yosungiramo konkire, kutentha mkati mwa konkire kumawunikidwa, ndipo mgwirizano pakati pa kusintha kwa kutentha kwa konkriti ndi m'badwo wa ming'alu umawunikidwa bwino.
pa
Pofufuza zomwe zimayambitsa ndi njira zochiritsira za kusefukira kwa madzi osefukira a Shuanghekou Hydropower Station ndi kusefukira kwa madzi osefukira a Luding Hydropower Station, zimadziwika kuti zoyambazo ndi chifukwa cha kusauka kwa chilengedwe, chithandizo chosagwira ntchito cha zomangamanga, malo ozizira ndi mapanga a duxun. pa kuthira konkire.The ming'alu mu ngalande kukhetsa kusefukira chifukwa cha osauka pulagi kuphatikiza ndi grouting akhoza bwino kuponderezedwa ndi mankhwala grouting ndi mkulu-permeability kusinthidwa epoxy utomoni zipangizo;ming'alu yotsirizirayi chifukwa cha kutentha kwambiri kwa hydration ya konkire, Ming'alu imatha kuthandizidwa ndikupewa bwino pochepetsa kuchuluka kwa simenti ndikugwiritsa ntchito polycarboxylate superplasticizer ndi C9035 konkriti.
Nthawi yotumiza: Jan-17-2022
