Asphalt pavements tau dav siv hauv kev tsim kho kev tsim kho vim lawv qhov zoo xws li kev ua haujlwm siab thiab muaj zog durability. Lawv qhov kev tsim kho zoo ncaj qha txiav txim siab txog lub neej kev pabcuam, kev nyab xeeb ntawm kev tsheb, thiab lub neej- tus nqi ncig ntawm txoj kev. Raws li kev tsim kho, kev tswj qhov kub thiab txias, compaction zoo, interlayer bonding, thiab kev tsim cov kua dej yog cov ntsiab lus tseem ceeb hauv kev tsim kho. Cov txheej txheem kev tsim kho tiav tuaj yeem muab faib ua plaub theem tseem ceeb: kev npaj tsim kho, core paving, kev kho mob sib koom ua ke, thiab ua tiav thiab kos npe.
Kev npaj kev tsim kho yog theem pib lav, feem ntau suav nrog kev npaj subgrade, txheej txheej txheej zoo, thiab daim ntawv thov tack coat.
● Lub subgrade yuav tsum tau muab ntxuav ua ntej, leveled, thiab compacted kom ntseeg tau tias muaj peev xwm sib xws thiab tsis muaj teeb meem kev daws teeb meem. Lub compaction℃yuav tsum ua raws li tus qauv tsim;
● Lub hauv paus txheej yuav tsum tau ntsuas qib thiab lub zog ntawm lub hauv paus, xws li cov cement-stabilized crushed pob zeb, thiab kho raws sij hawm ntawm tej qhov chaw puas;
● Ua ntej tack coat daim ntawv thov, lub hauv paus txheej saum npoo yuav tsum tau ntxuav ntawm cov khib nyiab, thiab emulsified asphalt tack coat roj yuav tsum tau muab sib npaug sib npaug kom ntseeg tau tias kev sib txuas ruaj khov ntawm txheej txheej thiab lub hauv paus txheej, tiv thaiv cov teeb meem tom qab.
Nto txheej paving thiab compaction yog cov txheej txheem kev tsim kho tseem ceeb.
● Ua ntej paving, qhov kub ntawm cov asphalt sib tov yuav tsum tau tswj nruj me ntsis. Qhov kub ntawm cov nroj tsuag yuav tsum tau khaws cia ntawm 150-180 degrees. Thaum lub sij hawm paving, paver yuav tsum tau siv los ua kom nrawm nrawm, thiab cov paving thickness yuav tsum raug tswj raws li qhov kev tsim tsa. Cov neeg ua haujlwm tseem yuav tsum raug xa mus rau tam sim ntawd hais txog kev sib cais thiab kev tsim nthwv dej thaum lub sijhawm paving.
● Compaction yuav tsum ua tib zoo ua raws li cov paving atherosclerosis thiab ua nyob rau hauv peb kauj ruam: pib compaction, theem nrab compaction, thiab zaum kawg compaction:
► Initial compaction siv steel -wheeled roller rau static compaction kom stabilize qhov sib tov;
► Secondary compaction siv lub hnyav- lub luag haujlwm rau cov menyuam los txhim kho kev sib cog lus;
► Thaum kawg compaction tshem tawm cov cim log thiab ua kom pavement flatness. Compaction kub yuav tsum tau tswj nruj me ntsis thoob plaws hauv tus txheej txheem kom tsis txhob qis - kub compaction cuam tshuam cov nyhuv compaction.
Kev kho mob sib koom ua ke yog qhov tseem ceeb rau kev tiv thaiv kev tsis xws li pavement.
Longitudinal pob qij txha yuav tsum tau ib tug staggered paving txoj kev, nrog ib tug nyob ib sab paving strips overlapping los ntawm 5-10 cm thiab compacted;
Transverse pob qij txha yuav tsum tau txiav kom huv si, thiab tom qab siv tack coat oil, kab pheeb ces kaum dov yuav tsum tau siv los txhim kho compaction.
Thaum kawg, txoj kev kos npe yog ua tiav.
Tom qab tshem tawm cov khib nyiab los ntawm txoj kev nto, kab kab, cov kab nres, thiab lwm yam kev tsheb ciav hlau tau ua tiav, kom ntseeg tau tias cov cim tau meej, ruaj khov, thiab ua tau raws li cov qauv xav tau. Tag nrho cov txheej txheem tsim kho yuav tsum tau saib xyuas tas li ntawm cov cim tseem ceeb los tsim kom muaj - zoo asphalt txoj kev nto.