Pavements ua raws li cov qauv kev tsim kho yuav tsum ua kom tau raws li ntau qhov kev xav tau. Cov txheej yuav tsum muaj zog, ruaj khov thiab muaj kev pom zoo ntawm cov txheej txheej sab saud. Txawm li cas los xij, tsis yog nyob rau hauv txhua qhov chaw nws ua rau kev nkag siab los muab cov kab ntau ntau. Ntau tus nqi pheej yig thiab kev pom zoo nyob rau hauv cov nqe lus ntawm cov yam ntxwv yog sau cov kev nrog ib tug tshwj xeeb muab tub lim. Ib feem uas raug xaiv yuav tso cai rau lub hauv paus tsim los siv tau ntev yam tsis tas yuav kho li niaj zaus.
Cov khoom siv rov qab
Lub hauv paus rau cov khoom pov tseg feem ntau yog cov xoob ntawm qhov qub txoj kev - piv txwv li, cov pob zeb, asph alt thiab txawm av. Kev siv cov xuab zeb nrog gravel kuj tau xyaum, tab sis cov kev xaiv no kim dua. Raws li kev sib xyaw ua ke ntawm kev ua haujlwm zoo, nws yog qhov tsim nyog siv asph alt crumb. Xws li backfilling ntawm txoj kev nrog kev sib ntxiv ntawm ib tug binder bitumen tom qab compaction muab ib tug noo-resistant thiab ruaj lub hauv paus. Kev ntseeg tau ntawm cov txheej ceev yog vim muaj qhov kub siab, tab sis ntawm kev mob uas muaj cov khoom siv zoo siv, thiab cov kev sib cav tau nqa nrog cov khoom siv tshwj xeeb.
Qhov zoo ntawm asph alt muab tub lim suav nrog kev ua haujlwm rauhuab cua cuam tshuam. Frost thiab nag lossis daus tsis txaus ntshai rau qhov no. Qhov no, los ntawm txoj kev, yog qhov sib txawv tseem ceeb ntawm cov khoom siv hauv kev ib txwm muaj. Yog li, sau txoj kev nrog rubble hauv kev xyaum tuaj yeem raug ntxuav los ntawm nag. Qhov no kuj tseem siv tau rau cov xuab zeb substrates, uas, yam tsis muaj cov ntawv cog lus zoo bituminous, tsuas yog siv sijhawm luv luv. Txawm li cas los xij, tseem muaj qhov tsis zoo ntawm asph alt dumps. Nyob rau hauv lub hnub ci, lub plasticizer yuav yaj thiab, yog li ntawd, soften lub web.
Road Filling Technology
Nws yuav tsum raug sau tseg tam sim ntawd tias kev siv ntau yam khoom siv hauv ib qho rov qab tsis raug tso cai, tshwj tsis yog cov xwm txheej tshwj xeeb uas tau muab los ntawm qhov project. Kev ua haujlwm ncaj qha yog ua los ntawm cov npoo ntawm lub hauv paus mus rau nruab nrab hauv txheej txheej. Nyob rau hauv rooj plaub no, tag nrho qhov dav ntawm qhov ua haujlwm yuav tsum tau them, nrog rau qhov chaw sloped nrog av. Secondary thiab ntxiv dumping yog tsis tso cai vim nws inefficiency. Txhua qhov kev suav nrog tom ntej yuav raug ntxuav tawm thaum siv. Txawm li cas los xij, hauv qee kis, txoj kev txhaws muab rau qhov muaj peev xwm nthuav dav. Tom qab ua tiav cov kauj ruam ua haujlwm, cov av ntau dhau thiab muab tub lim raug tshem tawm ntawm daim ntaub. Nws tsis yog qhov tsim nyog los nqa tawm - yog tias tsim nyog, koj tuaj yeem teem caij ntxiv rau ntawm txoj kev thiab tawm.
Dump compaction
Qhov no muaj kev cuam tshuam ntau dua rau kev tsim cov yam ntxwv ntawm cov txheej txheem zoo tshaj li qhov pib ntawm asph alt chips lossis crushed pob zeb. Ua ntej compaction, txhua txheej yog leveled raws li tus nqi ntawm txoj kab nqes ntev. Tom ntej no, koj tuaj yeem pib dov lub canvassiv cov cuab yeej tshwj xeeb hla txhua qhov dav ntawm txoj kev. Hauv qee qhov chaw nruj, qhov chaw compaction yuav tsum tau ua. Nyob rau hauv thiaj li rau cov roadbed yuav tsum tau nyob rau hauv tag nrho cov kab rov tav, cov teeb meem cheeb tsam yog rammed manually siv vibro-cuam tshuam ua. Tib lub sijhawm, tamping daim hlau tsis tuaj yeem siv rau hauv thaj chaw uas tsim kev sib txuas lus engineering.
Thaum siv cov khoom xoob xoob rau txoj kev, nws raug nquahu kom compact nrog lattice lossis cam rollers. Cov txheej txheem no yog siv nyob rau hauv thawj theem, nws kuj tseem siv tau cov cav tov ntawm pneumatic log tsheb, uas muaj ib tug tsis tiav load ntawm ballast - los ntawm 10-15 tons.
Txoj kev rov qab los ntawm kev rov qab
Yog tias cov cuab yeej ntawm cov ntaub pua tsev puv puv los ntawm kev rov qab ua haujlwm ntau dua nrog asph alt chips, ces nyob rau hauv cov ntaub ntawv ntawm kev kho cov qauv ntawm txoj kev, nws tseem pom zoo kom siv cov pob zeb crushed. Thaum lub sij hawm kev ntsuas peev, kev hloov pauv tag nrho yog ua tiav. Backfilling tsuas yog ib feem ntawm cov haujlwm no thaum tsim cov txheej txheem npaj. Txoj kev nto yog sprinkled nrog crushed pob zeb nyob rau hauv ob peb txheej. Thawj yog ib txheej ntawm ib feem loj, tom qab uas nws yog hloov los ntawm ib tug nplua-grained txheej. Qhov no yog qhov tseeb thaum backfilling tuaj yeem ua ke nrog asph alt pob zeb, ua raws li txheej txheej txheej txheej txheej txheej. Yog hais tias thaj tsam ntawm qhov deformed cheeb tsam ntawm txoj kev tsis pub tshaj 25 m2, ces es tsis txhob backfilling nws yog pom zoo kom nqa tawm.txheem patching.
Thaum twg siv rov qab siv?
Nyob rau hauv ib txwm version, backfilling yog ua nyob rau hauv cov cheeb tsam uas tsis muaj txawm tias nruab nrab cov tsheb thauj khoom. Hauv particular, kev tsim cov canvases ntawm cov chaw nkag sab nraum lub nroog yog xyaum. Tsis tas li ntawd, nrog kev pab los ntawm cov cuab yeej siv no, ntau qhov kev tsim kho tshiab tau ua tiav. Los ntawm nws tus kheej, backfilling yog ib qho tsim nyog txheej hauv kev tsim kho, yog li ntawd, nyob rau hauv cov cheeb tsam uas tsis muaj kev xav tau ntau ntxiv rau txheej sab saud, txoj kev saum npoo yog sab laug nyob rau hauv daim ntawv ntawm compacted asph alt chips. Raws li kev siv cov khoom siv los ua cov khoom siv thev naus laus zis, cov pob zeb crushed, piv txwv li, tuaj yeem ua raws li cov txheej txheem dej zoo.
Zaj lus
Raws li thev naus laus zis nce qib, yog li qhov zoo ntawm txoj kev. Kev siv cov thev naus laus zis niaj hnub no, cov khoom sib txuas ntxiv hauv cov kev daws teeb meem thiab cov ntsiab lus zoo tso cai rau tsim cov qauv kev ruaj ntseg. Tab sis, kev ua tau zoo yog ua tiav ntawm tus nqi ntawm tus nqi tsim nyog, thaum qee qhov kev tso cov txheej txheem tag nrho tsis ua rau nws tus kheej. Nws yog nyob rau hauv xws li cov xwm txheej uas nws yog advisable siv ib tug roadbed tsim los ntawm backfilling. Lub ntsiab kom zoo dua ntawm cov tshuab no yog nws muaj thiab tus nqi qis. Qhov no yog cov khoom siv rov ua dua tshiab, uas, hauv qhov tseem ceeb, yog rov ua dua asph alt los ntawm cov pavements qub - raws li, nws tuaj yeem tau txais nrog tsawg lossis tsis muaj peev. Nws tseem tsuas yog sau thiab ua kom qhov loj ntawm lub canvas raws li qhov yuav tsum tau muaj rau ib qhov chaw tshwj xeeb.
