Dab tsi yog qhov sib txawv ntawm kev sib xyaw qhuav thiab ntub-sib xyaw shotcrete?

Shotcrete yog ib yam khoom siv uas feem ntau siv los tsim cov khoom siv xws li phab ntsa, pem teb, thiab ru tsev. Nws yog cov khoom siv ntau yam uas tuaj yeem siv rau hauv ntau yam kev siv, nrog rau cov kab hauv kab, cov pas dej da dej, thiab cov phab ntsa tuav. Muaj ob txoj hauv kev tseem ceeb ntawm kev siv tshuaj tua kab mob: qhuav-sib xyaw thiab ntub-sib xyaw. Thaum ob txoj hauv kev koom nrog kev txau cov pob zeb lossis tshuaj khib rau ntawm qhov chaw siv lub tshuab pneumatic, muaj qhov sib txawv tseem ceeb ntawm txoj kev npaj thiab siv. Hauv tsab xov xwm no, peb yuav tham txog qhov sib txawv ntawm kev sib xyaw qhuav thiab ntub-sib xyaw shotcrete.

Dry-mix Shotcrete:

Dry-mix shotcrete, tseem hu ua gunite, yog ib txoj kev ntawm kev txau cov pob zeb qhuav los yog mortar rau ntawm qhov chaw thiab tom qab ntawd ntxiv dej ntawm lub nozzle. Cov ntaub ntawv qhuav yog pre-mixed thiab loaded rau hauv lub hopper, uas pub cov sib tov rau hauv lub tshuab txhaj tshuaj. Lub tshuab siv compressed cua los txhawb cov khoom qhuav los ntawm lub hose, uas yog qhia ntawm lub hom phiaj nto. Ntawm lub nozzle, dej yog ntxiv rau cov khoom qhuav, uas ua rau cov cement thiab tso cai rau nws sib txuas nrog rau saum npoo.

Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm kev sib xyaw qhuav-tso yog tias nws tso cai rau kev tswj hwm ntau dua ntawm kev sib xyaw tsim. Vim hais tias cov khoom qhuav yog pre-mixed, qhov sib tov tuaj yeem hloov kho kom tau raws li cov kev xav tau tshwj xeeb rau lub zog, kev ua haujlwm, thiab sijhawm teem sijhawm. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov tshwj xeeb uas yuav tsum muaj qib siab ntawm precision.

Lwm qhov zoo dua ntawm kev sib xyaw qhuav-sib xyaw yog tias nws tuaj yeem siv rau hauv cov khaubncaws sab nraud povtseg dua li ntub-tshuaj shotcrete. Qhov no ua rau nws yog qhov kev xaiv zoo rau cov ntawv thov uas qhov hnyav yog qhov kev txhawj xeeb, xws li ntawm cov choj decks lossis lwm qhov xwm txheej uas yuav tsum muaj cov khoom siv hnyav.

Txawm li cas los xij, kev sib xyaw qhuav-sib xyaw tseem muaj qee qhov tsis zoo. Vim hais tias cov khoom qhuav yog propelled los ntawm compressed cua, muaj peev xwm yuav muaj ib tug tseem ceeb npaum li cas ntawm rebound los yog overspray, uas yuav ua rau ib tug ntxhov ua hauj lwm ib puag ncig thiab kuj yuav ua rau nkim khoom. Tsis tas li ntawd, vim tias cov dej ntxiv ntawm lub nozzle, tuaj yeem muaj kev hloov pauv hauv cov ntsiab lus dej, uas tuaj yeem cuam tshuam rau lub zog thiab sib xws ntawm cov khoom kawg.

Wet-mix Shotcrete:

Wet-mix shotcrete yog ib txoj hauv kev ntawm kev txau cov pob zeb lossis tshuaj khib rau ntawm qhov chaw uas muaj kev sib xyaw ua ntej cov ntaub ntawv nrog dej ua ntej lawv thauj mus rau hauv lub tshuab txhaj tshuaj. Tom qab ntawd cov ntaub ntub dej yog nqus los ntawm lub hose thiab txau mus rau lub hom phiaj siv cov cua compressed. Vim tias cov khoom siv ua ntej sib xyaw nrog dej, nws yuav tsum muaj huab cua tsawg dua los txhawb nws los ntawm lub hose dua li qhuav-mix shotcrete.

Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm ntub-tshuaj txhaj tshuaj yog tias nws tsim tawm tsawg dua los yog overspray dua li qhuav-mix shotcrete. Vim tias cov khoom siv ua ntej sib xyaw nrog dej, nws muaj qhov qis tshaj tawm thaum nws tawm ntawm lub nozzle, uas txo cov khoom siv uas rov qab los ntawm qhov chaw. Qhov no ua rau qhov chaw ua haujlwm huv dua thiab siv cov khoom siv tsawg dua.

Lwm qhov kom zoo dua ntawm ntub-mix shotcrete yog tias nws tsim cov khoom zoo ib yam thiab zoo sib xws dua li cov khoom sib xyaw qhuav. Vim tias qhov sib xyaw ua ntej sib xyaw nrog dej, tsis muaj qhov sib txawv ntawm cov ntsiab lus dej, uas tuaj yeem ua rau muaj zog ntau dua thiab sib xws.

Txawm li cas los xij, ntub-mix shotcrete kuj muaj qee qhov tsis zoo. Vim tias cov khoom siv ua ntej sib xyaw nrog dej, muaj kev tswj xyuas tsawg dua ntawm kev sib xyaw tsim dua li nrog cov tshuaj tua hluav taws qhuav. Tsis tas li ntawd, ntub-mix shotcrete yuav tsum muaj cov cuab yeej siv ntau dua thiab tuaj yeem kim dua li cov khoom sib xyaw qhuav. Thaum kawg, vim tias ntub-sib xyaw shotcrete muaj cov ntsiab lus dej ntau dua, nws tuaj yeem siv sijhawm ntev los kho thiab tuaj yeem cuam tshuam ntau dua rau kev tawg thiab shrinkage.

Xaus:

Hauv cov ntsiab lus, ob qho tib si qhuav-sib xyaw thiab ntub-sib xyaw shotcrete muaj lawv tus kheej qhov zoo thiab qhov tsis zoo.