Kev kho thiab tiv thaiv cov kab nrib pleb ntawm cov pob zeb hauv qhov dej ntws tawm ntawm chaw nres tsheb fais fab
1.1 Kev piav qhia txog qhov project qhov dej nyab ntawm Shuanghekou Hydropower Station hauv Mengjiang River Basin
Lub qhov dej ntws tawm ntawm Shuanghekou Hydropower Station hauv Mengjiang River Basin ntawm Guizhou xeev siv cov duab ntawm lub rooj vag nroog. Tag nrho lub qhov av yog 528 m ntev, thiab qhov nkag thiab tawm hauv pem teb yog 536.65 thiab 494.2 m feem. Ntawm lawv, tom qab thawj zaug khaws dej ntawm Shuanghekou Hydropower Station, Tom qab kev tshuaj xyuas ntawm qhov chaw, nws pom tias thaum qib dej hauv thaj chaw pas dej siab dua qhov siab ntawm sab saum toj ntawm lub qhov dej ntws tawm, cov pob qij txha tsim kho thiab cov pob qij txha txias ntawm lub phaj hauv qab ntawm lub qhov ntev ntev ua rau dej ntws tawm, thiab qhov dej ntws tawm nrog rau qib dej hauv thaj chaw pas dej. Tib lub sijhawm, dej ntws tawm kuj tshwm sim hauv phab ntsa sab pob qij txha txias thiab cov pob qij txha tsim kho hauv ntu qhov nkhaus ntawm Longzhuang. Tom qab kev tshawb nrhiav thiab kev tshawb fawb los ntawm cov neeg ua haujlwm cuam tshuam, pom tau tias cov laj thawj tseem ceeb ntawm kev ntws dej hauv cov chaw no yog vim cov xwm txheej geological tsis zoo ntawm cov pob zeb hauv cov qhov av no, kev kho tsis zoo ntawm cov pob qij txha tsim kho, kev tsim cov pob qij txha txias thaum lub sijhawm nchuav cov pob zeb, thiab kev sib sau ua ke thiab grouting tsis zoo ntawm cov duxun qhov av plugs. Jia et al. Txog qhov kawg no, cov neeg ua haujlwm cuam tshuam tau tawm tswv yim txoj kev siv tshuaj grouting rau ntawm thaj chaw ntws dej kom tiv thaiv kev ntws dej thiab kho cov kab nrib pleb.
1.2 Kev kho cov kab nrib pleb hauv qhov dej ntws tawm ntawm Shuanghekou Hydropower Station hauv Mengjiang River Basin
Tag nrho cov qhov av ntawm lub qhov dej nyab ntawm Luding Hydropower Station yog ua los ntawm HFC40 pob zeb, thiab feem ntau ntawm cov kab nrib pleb los ntawm kev tsim lub pas dej ntawm lub chaw nres tsheb hydropower tau faib rau ntawm no. Raws li cov ntaub ntawv txheeb cais, cov kab nrib pleb feem ntau yog nyob rau hauv 0 + 180 ~ 0 + 600 seem ntawm lub pas dej. Qhov chaw tseem ceeb ntawm cov kab nrib pleb yog phab ntsa sab nrog qhov deb ntawm 1 ~ 7m ntawm lub phaj hauv qab, thiab feem ntau ntawm qhov dav yog li 0.1 hli, tshwj xeeb tshaj yog rau txhua lub tsev rau khoom. Qhov nruab nrab ntawm kev faib tawm yog qhov feem ntau. Ntawm lawv, lub kaum sab xis ntawm qhov tshwm sim ntawm cov kab nrib pleb thiab lub kaum sab xis tseem loj dua lossis sib npaug rau 45. , cov duab yog tawg thiab tsis xwm yeem, thiab cov kab nrib pleb uas tsim cov dej ntws feem ntau muaj me ntsis ntawm cov dej ntws, thaum feem ntau ntawm cov kab nrib pleb tsuas yog tshwm sim ntub ntawm qhov sib koom ua ke thiab cov cim dej tshwm sim ntawm qhov chaw ua vaj tse, tab sis muaj ob peb qhov pom tseeb ntawm cov dej ntws. Tsis tshua muaj cov cim ntawm cov dej ntws me me. Los ntawm kev soj ntsuam lub sijhawm tsim ntawm cov kab nrib pleb, nws paub tias cov kab nrib pleb yuav tshwm sim thaum lub formwork raug tshem tawm 24 teev tom qab cov pob zeb ua tiav rau theem pib, thiab tom qab ntawd cov kab nrib pleb no yuav maj mam mus txog lub sijhawm siab tshaj plaws li 7 hnub tom qab tshem tawm ntawm lub formwork. Nws yuav tsis nres qeeb qeeb kom txog thaum 15-20 hnub tom qab demolding.
2. Kev kho thiab kev tiv thaiv kom zoo ntawm cov kab nrib pleb hauv cov qhov dej ntws tawm ntawm cov chaw nres tsheb fais fab
2.1 Txoj kev siv tshuaj rau cov dej ntws hauv qhov av ntawm Shuanghekou Hydropower Station
2.1.1 Kev Taw Qhia, cov yam ntxwv thiab kev teeb tsa ntawm cov ntaub ntawv
Cov khoom siv ntawm cov tshuaj slurry yog PCI-CW siab permeability hloov kho epoxy resin. Cov khoom siv muaj lub zog sib koom ua ke siab, thiab tuaj yeem kho tau ntawm chav tsev kub, nrog tsawg dua shrinkage tom qab kho, thiab tib lub sijhawm, nws muaj cov yam ntxwv ntawm lub zog siab thiab ruaj khov kub tsis kam, yog li nws muaj cov dej zoo-nres thiab cov teebmeem-nres. Hom khoom siv grouting reinforcing no yog siv dav hauv kev kho thiab txhawb nqa ntawm cov haujlwm txuag dej. Tsis tas li ntawd, cov khoom siv kuj muaj qhov zoo ntawm cov txheej txheem yooj yim, kev ua tau zoo heev ntawm kev tiv thaiv ib puag ncig, thiab tsis muaj kuab paug rau ib puag ncig.
2.1.2 Cov kauj ruam tsim kho
Ua ntej, nrhiav cov xov thiab cov qhov tho qhov. Ntxuav cov kab nrib pleb uas pom nyob rau hauv qhov dej ntws nrog dej siab thiab tig rov qab rau ntawm qhov chaw ua vaj tse, thiab xyuas seb qhov ua rau muaj kab nrib pleb thiab qhov kev taw qhia ntawm cov kab nrib pleb. Thiab siv txoj kev sib txuas ntawm lub qhov txiav thiab lub qhov nkhaus rau kev tho. Tom qab ua tiav kev tho lub qhov nkhaus, nws yog qhov tsim nyog siv cua siab thiab rab phom dej siab los xyuas lub qhov thiab kab nrib pleb, thiab ua kom tiav cov ntaub ntawv ntawm qhov loj ntawm kab nrib pleb.
Qhov thib ob, cov qhov ntaub, cov qhov kaw thiab cov seams kaw. Ib zaug ntxiv, siv cua siab los ntxuav lub qhov grouting uas yuav tsum tau tsim, thiab tshem tawm cov av noo uas tso rau hauv qab ntawm lub qhov thiab ntawm phab ntsa ntawm lub qhov, thiab tom qab ntawd ntsia lub qhov grouting blocker thiab cim nws ntawm lub qhov yeeb nkab. Kev txheeb xyuas cov grout thiab qhov cua. Tom qab cov qhov grouting tau teeb tsa, siv PSI-130 tus neeg sawv cev ceev ceev los kaw cov qhov, thiab siv epoxy cement los txhawb kev kaw ntawm cov qhov. Tom qab kaw qhov qhib, nws yog qhov tsim nyog los txiav ib lub qhov dav 2cm thiab tob 2cm raws li qhov kev taw qhia ntawm qhov tawg ntawm cov pob zeb. Tom qab ntxuav lub qhov chiseled thiab dej siab retrograde, siv lub qhov ceev ceev los kaw lub qhov.
Ib zaug ntxiv, tom qab kuaj xyuas qhov cua ntawm cov kav dej faus, pib ua haujlwm grouting. Thaum lub sijhawm grouting, cov qhov oblique uas muaj tus lej khib raug sau ua ntej, thiab tus lej ntawm cov qhov raug teeb tsa raws li qhov ntev ntawm cov txheej txheem tsim kho tiag tiag. Thaum grouting, nws yog ib qho tsim nyog los xav txog qhov xwm txheej grouting ntawm cov qhov sib ze. Thaum cov qhov sib ze muaj grouting, tag nrho cov dej hauv cov qhov grouting yuav tsum tau ntws tawm, thiab tom qab ntawd txuas nrog cov kav dej grouting thiab grouted. Raws li txoj kev saum toj no, txhua lub qhov yog grouted los ntawm sab saud mus rau hauv qab thiab hauv qab mus rau siab.
Kev kho thiab tiv thaiv cov kab nrib pleb ntawm cov pob zeb hauv qhov dej ntws tawm ntawm chaw nres tsheb fais fab
Thaum kawg, cov grout xaus tus qauv. Tus qauv siab rau cov tshuaj grouting ntawm cov pob zeb tawg hauv qhov dej ntws yog tus nqi tus qauv muab los ntawm tus qauv tsim. Feem ntau hais lus, qhov siab tshaj plaws grouting siab yuav tsum tsawg dua lossis sib npaug rau 1.5 MPa. Kev txiav txim siab ntawm qhov kawg ntawm grouting yog raws li qhov ntau ntawm kev txhaj tshuaj thiab qhov loj ntawm qhov siab grouting. Qhov yuav tsum tau ua yog tias tom qab lub siab grouting mus txog qhov siab tshaj plaws, grouting yuav tsis nkag mus rau hauv qhov hauv 30 hli. Ntawm lub sijhawm no, cov yeeb nkab khi thiab slurry kaw kev ua haujlwm tuaj yeem ua tiav.
Cov ua rau thiab kev kho mob ntawm cov kab nrib pleb hauv qhov dej ntws tawm ntawm Luding Hydropower Station
2.2.1 Kev tshuaj xyuas qhov ua rau muaj qhov dej nyab ntawm Luding Hydropower Station
Ua ntej, cov ntaub ntawv raw tsis sib haum xeeb thiab ruaj khov. Qhov thib ob, qhov ntau ntawm cov cement hauv qhov sib xyaw ua ke yog loj, uas ua rau cov pob zeb ua kom muaj cua sov ntau dhau. Qhov thib ob, vim yog qhov coefficient loj ntawm cov pob zeb sib xyaw hauv cov hav dej, thaum qhov kub hloov pauv, cov pob zeb sib xyaw thiab cov khoom hu ua coagulating yuav tawg. Qhov thib peb, HF pob zeb muaj cov kev xav tau thev naus laus zis siab, nws nyuaj rau tus tswv hauv cov txheej txheem tsim kho, thiab kev tswj hwm lub sijhawm co thiab txoj kev tsis tuaj yeem ua tau raws li cov qauv xav tau. Tsis tas li ntawd, vim tias lub qhov dej nyab ntawm Luding Hydropower Station tau nkag mus, muaj cua nkag loj, ua rau qhov kub qis hauv lub qhov av, ua rau muaj qhov sib txawv ntawm qhov kub thiab txias ntawm cov pob zeb thiab ib puag ncig sab nraud.
2.2.2 Kev kho thiab kev tiv thaiv kab nrib pleb hauv qhov av dej ntws tawm
(1) Yuav kom txo qhov cua nkag hauv qhov av thiab tiv thaiv qhov kub ntawm cov pob zeb ua vaj tse, kom txo qhov sib txawv ntawm qhov kub ntawm cov pob zeb ua vaj tse thiab qhov chaw sab nraud, lub thav duab khoov tuaj yeem teeb tsa ntawm qhov tawm ntawm qhov av nchuav, thiab daim ntaub thaiv canvas tuaj yeem dai.
(2) Raws li lub hauv paus ntawm kev ua kom tau raws li qhov yuav tsum tau ua ntawm lub zog, qhov sib piv ntawm cov pob zeb ua vaj tse yuav tsum tau hloov kho, qhov ntau ntawm cov cement yuav tsum tau txo kom ntau li ntau tau, thiab qhov ntau ntawm cov tshauv ya yuav tsum tau nce tib lub sijhawm, kom qhov kub ntawm cov dej ntawm cov pob zeb ua vaj tse tuaj yeem txo qis, kom txo qhov kub sab hauv thiab sab nraud ntawm cov pob zeb ua vaj tse. Qhov sib txawv ntawm qhov kub thiab txias.
(3) Siv lub khoos phis tawj los tswj cov dej ntxiv, kom qhov sib piv ntawm dej thiab cement raug tswj hwm nruj me ntsis thaum lub sijhawm sib tov cov pob zeb. Nws yuav tsum nco ntsoov tias thaum lub sijhawm sib tov, txhawm rau txo qhov kub ntawm cov khoom siv raw, nws yog qhov tsim nyog los siv qhov kub qis dua. Thaum thauj cov pob zeb thaum lub caij ntuj sov, kev rwb thaiv tsev thiab kev ntsuas txias yuav tsum tau ua kom zoo kom txo qhov kub ntawm cov pob zeb thaum lub sijhawm thauj mus los.
(4) Cov txheej txheem vibrating yuav tsum tau tswj hwm nruj me ntsis hauv cov txheej txheem tsim kho, thiab kev ua haujlwm vibrating yog txhawb nqa los ntawm kev siv cov pas nrig vibrating uas muaj qhov loj ntawm 100 hli thiab 70 hli.
(5) Tswj xyuas qhov ceev ntawm cov pob zeb nkag mus rau hauv lub tsev rau khoom kom nruj, kom nws qhov ceev nce qis dua lossis sib npaug rau 0.8 m / h.
(6) Txuas lub sijhawm rau kev tshem tawm cov qauv pob zeb mus rau 1 npaug ntawm lub sijhawm qub, uas yog, ntawm 24 teev mus rau 48 teev.
(7) Tom qab rhuav lub formwork, xa cov neeg ua haujlwm tshwj xeeb los ua haujlwm txij nkawm ntawm qhov project concrete raws sijhawm. Cov dej txij nkawm yuav tsum khaws cia rau ntawm 20 ℃ lossis siab dua dej sov, thiab qhov chaw ntawm cov pob zeb yuav tsum khaws cia kom noo.
(8) Lub ntsuas kub raug faus rau hauv lub tsev rau khoom siv pob zeb, qhov kub thiab txias sab hauv cov pob zeb raug saib xyuas, thiab kev sib raug zoo ntawm qhov hloov pauv kub ntawm cov pob zeb thiab qhov tawg tau raug soj ntsuam zoo.
Los ntawm kev tshuaj xyuas cov ua rau thiab cov txheej txheem kho ntawm qhov dej nyab ntawm Shuanghekou Hydropower Station thiab qhov dej nyab ntawm Luding Hydropower Station, nws paub tias qhov qub yog vim muaj cov xwm txheej geological tsis zoo, kev kho tsis zoo ntawm cov pob qij txha tsim kho, cov pob qij txha txias thiab cov qhov tsua duxun thaum lub sijhawm nchuav pob zeb. Cov kab nrib pleb hauv qhov dej nyab uas tshwm sim los ntawm kev sib txuas tsis zoo thiab grouting tuaj yeem raug tshem tawm zoo los ntawm cov tshuaj grouting nrog cov khoom siv hloov kho epoxy resin uas muaj permeability siab; qhov tom kawg kab nrib pleb uas tshwm sim los ntawm qhov kub ntau dhau ntawm cov dej hauv pob zeb, Cov kab nrib pleb tuaj yeem kho thiab tiv thaiv tau zoo los ntawm kev txo cov cement thiab siv cov polycarboxylate superplasticizer thiab C9035 cov ntaub ntawv pob zeb.
Lub sijhawm tshaj tawm: Lub Ib Hlis-17-2022
