I. Cov Ntsiab Cai Ua Haujlwm: Lub teeb rau hnyav, qeeb kom nrawm, Ntug mus rau qhov chaw
Cov no yog "golden txoj cai" ntawm txoj kev cov menyuam ua haujlwm, muaj feem xyuam rau feem ntau ntawm kev tsim kho scenarios.
Lub teeb rau Hnyav: Siv lub teeb rau cov menyuam los yog kev sib txuas zoo li qub rau kev sib cog lus thawj zaug kom tsis txhob thawb thiab piling cov av xoob. Tom qab lub subgrade tau pib stabilized, hloov mus rau ib tug hnyav rau cov menyuam los yog vibratory cov menyuam rau theem nrab compaction, kom ntseeg tau ib tug maj mam nce nyob rau hauv compaction.
Slow to Fast: Tswj qhov pib compaction ceev ntawm 2-4 km / h. Raws li qhov compaction ceev, qhov ceev yuav maj mam nce mus rau 6-8 km / h. Txawm li cas los xij, qhov siab tshaj plaws ceev thaum lub sij hawm vibratory compaction yuav tsum tsis txhob ntau tshaj 4 km / h kom tsis txhob cuam tshuam lub uniformity ntawm compaction.
Ntug mus rau Center: Rolling los ntawm ob sab ntawm subgrade mus rau qhov chaw pab tsim ib txoj kev crown qauv uas yooj yim rau cov kua. Txoj kev no siv tau rau ob qho tib si ncaj thiab loj - voj voog nkhaus.
II. Cov txheej txheem ua haujlwm zoo rau kev ua haujlwm sib txawv
1. Slope Compaction: Tsav lub log ib txwm nyob tom qab
Thaum nce toj, lub log nram qab, raws li lub log tsav, muab kev sib zog ua kom muaj zog, thaum lub log pem hauv ntej compact txoj kev ua ntej, bearing lub zog shear.
Thaum mus downhill, txoj kev saum npoo twb compacted los ntawm lub log pem hauv ntej tuaj yeem pab txhawb lub zog ntawm lub log tsheb, tiv thaiv kev poob.
Txawm hais tias yuav nce toj lossis nqis roob, yuav tsum tsis txhob hloov lub iav tam sim lossis nres nres; tswj kev pib thiab nres.
2. Curves thiab me Radius Curves: Compaction ntawm sab hauv mus rau sab nraud
Rau txoj kev nkhaus nrog superelevation, compaction yuav tsum pib ntawm sab qis (sab hauv) mus rau sab siab dua (sab nrauv), maj mam ua ib qho - txoj kev hla txoj kab nqes kom tsis txhob muaj dej .
3. Mos Subgrade: Static Compaction Ua ntej, ces vibration
Txhawm rau tiv thaiv cov khoom txav los yog "caij nplooj ntoos hlav av" tshwm sim los ntawm kev co, 1-2 hla kev ntawm cov khoom zoo li qub yuav tsum tau ua ua ntej kom ruaj khov ntawm qhov chaw ua ntej hloov mus rau hom kev co.
4. Asphalt Pavement: Kev tswj qhov kub thiab txias yog qhov tseem ceeb
Thaum pib compaction kub yuav tsum tsis txhob qis dua 120 degree, thiab yuav tsum tsis txhob qis dua 70℃ua ntej qhov kawg compaction.
Ua ntej, zoo li qub ua ntej-compact, tom qab ntawd siab - zaus qis-amplitude vibration compaction, thiab thaum kawg zoo li qub tiav kom paub meej qhov chaw du yam tsis muaj log lem.
III. Vibration Control thiab Travel Route Optimization
1. Vibration Operation Sequence: Pib ua ntej vibration
Kev vibration yuav tsum tau pib tsuas yog tom qab cov menyuam tau mus zoo. Pib vibration nyob rau hauv qhov chaw yog nruj me ntsis txwv tsis pub, raws li nws yuav yooj yim ua rau cov khoom puas thiab ua rau txoj kev tsis sib xws.
2. Vibration Frequency thiab Amplitude Matching
Tsawg zaus, siab amplitude: Siv rau kev sib sib zog nqus compaction (xws li subgrade), muaj zog nkag.
High zaus, tsawg amplitude: Siv rau saum npoo los yog asphalt nto txheej, txhim kho smoothness.
3. Txoj kev mus ncig thiab sib tshooj dav
Txhua qhov kev cog lus yuav tsum sib tshooj ntawm lub log dhau los ntawm 1/3 mus rau 1/2 ntawm lub log dav kom tiv thaiv kev sib tsoo.
Nws raug nquahu kom siv "ntev ua ntej thiab thim rov qab, lateral staggered" txoj kev los ua kom tiav cross-zoo li tus compaction, txhim kho tag nrho cov uniformity.
IV. Cov txheej txheem tshwj xeeb rau cov qauv tshwj xeeb: Cov "Kneading Effect" ntawm cov menyuam yaus
Rau quincunx cuam tshuam rau cov menyuam, cov nyhuv "kneading" tuaj yeem ua tiav los ntawm kev sib hloov ntawm lub moos thiab rov ua haujlwm rov ua haujlwm, txhim kho kev sib raug zoo interlayer thiab txo qhov kev pheej hmoo ntawm kev tawg. Tom qab txhua tsib lub moos hla mus, chav tsev tom ntej yuav tsum tau dov rov qab, zoo ib yam li lub hauv paus ntsiab lus ntawm "kneading mov paj."
Tsis tas li ntawd, qhov cuam tshuam dov ceev yuav tsum tswj ntawm 10 thiab 15 km / h. Kev qeeb qeeb heev cuam tshuam rau kev ua tau zoo, thaum nrawm nrawm txo qhov cuam tshuam lub zog hloov pauv.
V. Cov ntsiab lus kev nyab xeeb thiab kev saib xyuas
Kev vibration ntawm cov tawv tawv yog nruj me ntsis txwv: nws tuaj yeem ua rau lub zog vibration damping thiab bearings tau yooj yim;
Lub tshuab yuav tsum tau nres ua ntej hloov ceev: kom tsis txhob muaj kev cuam tshuam rau kev sib kis;
Lub teeb pom kev txaus yog xav tau rau kev tsim kho hmo ntuj: txhawm rau ua kom muaj kev nyab xeeb ntawm kev ua haujlwm;
Ntxuav lub log steel thiab xyuas cov dej txau kom sai tom qab txhua hnub ua haujlwm: txhawm rau tiv thaiv cov khoom siv los ntawm kev cuam tshuam rau kev sib cog lus zoo.
