Subgrade-qhov no yog cov av ib txwm muaj (lossis cov av txhim kho), feem ntau compacted. Subbase-qhov no yog txheej pob zeb saum toj ntawm subgrade. Base (los yog hauv paus chav kawm)-qhov no yog txheej txheej ntawm cov khoom nyob rau sab saum toj ntawm lub subbase thiab ncaj qha rau hauv qab ntawm lub slab.
Puas sub-base yuav tsum tau compacted?
Nws yog ib qho tseem ceeb uas txhua qhov hloov pauv tau yooj yim tau muab tso thiab ua kom zoo, thiab kev cog lus yuav tsum ua kom tsawg kawg ob txheej uas siv cov cuab yeej raug. Lub vibrating phaj compactor tej zaum yuav haum rau patios thiab txoj kev, tab sis yuav tsum tau ib tug ntau hnyav-lub luag hauj lwm vibrating roller yuav tsum tau rau ib tug tsav tsheb.
Dab tsi yog compacted subgrade?
A subgrade yog ua up ntawm ib txwm av uas tau cog lus kom tiv taus cov loads saum toj no. Nws yog ib txheej uas yuav tsum tau muaj nyob rau hauv ntau yam xws li pavements thiab slabs, txawm hais tias nws yuav tsum muaj tej yam ntxwv.
Kuv puas tuaj yeem siv pob zeb ua sub-base?
Yog tias koj tus neeg tsim khoom siv cov pob zeb nws yuav pom tias nws yuav tawg yooj yim rau hauv av thiab yuav siv sijhawm ntau thiab nyiaj txiag kom tau txais qib uas xav tau. Kuv yuav tsis qhia siv gravel. Lub hauv paus tsim tau zoo txhais tau tias koj lub tsav yuav tsis tau txais lub dab dej.
Kuv tuaj yeem siv dab tsi los hloov lub hauv paus?
Lwm cov ntaub ntawv muab los siv ua lub hauv paus muaj xws li ballast thiab crusher khiav, tab sis cov no muaj kev tswj me ntsis ntawm qhov sib npaug ntawm cov khib nyiab thiab nplua. Txawm tias tsis tsim nyog rau kev siv nyob rau hauv cov cheeb tsam ntawm hnyavkev khiav tsheb lossis kev lag luam, cov ntaub ntawv no yuav tsum ua kom haum rau patios thiab cov qauv kev tsav tsheb.
