Qib Reinforcement ntawm Track Spike Pull-tawm Kev Tiv Thaiv thiab Tshwj Xeeb Geological Adaptation Technology
Dab tsi yog cov qauv ntsuas ntawm kev sib tw rub - tawm qhov kev tawm tsam thiab cov xwm txheej geological sib raug?
Taug qab spike rub- tawm tsis kam muab faib ua peb qib. Qib 1 rub- tawm quab yuam Ntau dua lossis sib npaug li 120kN yog qhov tsim nyog rau kev sib haum xeeb-nrawm geology xws li cov av mos thiab cov swamps, uas tuaj yeem tiv taus lub zog tensile ntawm lub txaj tsis sib xws ntawm cov neeg pw tsaug zog. Qib 2 rub- tawm quab yuam Ntau dua lossis sib npaug li 80kN yog tsim rau thaj tsam permafrost thiab alpine, tiv thaiv qhov cuam tshuam ntawm lub sijhawm los ntawm permafrost heave thiab thaw kev sib haum xeeb. Qib 3 rub- tawm quab yuam Ntau dua lossis sib npaug li 50kN yog qhov tsim nyog rau kev ruaj khov geology xws li lub txaj ballast thiab cov pob zeb nyuaj subgrade, ua tau raws li cov kev xav tau ntawm cov kev tsheb ciav hlau zoo tib yam thiab lub Hoobkas tshwj xeeb kab. Spikes ntawm cov qib sib txawv txais qhov sib txawv ntawm qhov sib txawv ntawm qhov tob: Qib 1 spikes muaj qhov tob tob dua lossis sib npaug rau 200mm, Qib 2 Ntau dua lossis sib npaug rau 180mm, thiab Qib 3 Ntau dua lossis sib npaug rau 150mm. Qhov tob tsis txaus yuav ncaj qha txo qhov rub- tawm dag zog ntau dua 30%. Cov qauv muab qhab nia yuav tsum ua raws li cov qauvTxoj Cai rau Kev Tsim Kho Kev Txais Kev Pom Zoo ntawm Railway Track Engineering. Hla -qib kev xaiv ntawm spikes nyob rau hauv txawv geological scenarios yog nruj me ntsis txwv tsis pub, txwv tsis pub nws yuav ua rau pw tsaug zog txav thiab tsav tsheb muaj kev nyab xeeb.
Dab tsi yog cov qauv tsim ntsuas rau kev ntxiv dag zog rau rub- tawm ntawm kev tawm tsam ntawm spikes hauv cov av geology?
Spikes hauv cov av mos geology txais yuav cov qauv tsim qauv ntawm inverted conical xov + winged thauj tog rau nkoj phaj. Lub inverted conical xov muaj ib tug taper ntawm 1:10, thiab qhov chaw tom nrog anchoring mortar yog 40% loj dua li ntawm cov xov zoo tib yam, txhim kho tuav ntawm cov ntsia hlau loj thiab mortar. Lub winged thauj tog rau nkoj phaj yog teem rau hauv qab ntawm lub spikes, nrog ib txoj kab uas hla ntawm 120mm thiab ib tug tuab ntawm 10mm, uas yuav ua rau kom muaj kev sib cuag cheeb tsam ntawm lub spikes thiab ballast txaj, disperse lub rub - tawm quab yuam, thiab txo lub zos siab ntawm lub ballast txaj. Lub taub hau ntsia hlau txais yuav qhov sib txawv ntawm tus ntoo khaub lig- ntu tsim, nrog rau txoj kab uas hla ntawm 28mm thiab tsis yog -anchoring seem txoj kab uas hla ntawm 22mm, txo tus kheej- qhov hnyav thaum ua kom muaj zog thiab txo qis ntxiv ntawm cov av mos. Ib qho kev tiv thaiv- loosening washer yog ntxiv rau sab saum toj ntawm qhov ntsia hlau loj, ua los ntawm 65Mn caij nplooj ntoos hlav steel, uas cuam tshuam qhov me ntsis ntab ntawm qhov ntsia hlau loj los ntawm elastic preload thiab tiv thaiv kev xoob xoob. Qhov rub tawm - tawm quab yuam ntawm qhov kev ua kom zoo dua qub tuaj yeem nce ntau dua 50%. Tshawb xyuas los ntawm cov kev ntsuam xyuas hauv av mos, nws tuaj yeem tuav ruaj khov rub- tawm kev ua tau zoo raws li qhov xwm txheej ntawm 100mm ballast txaj sib hais.
Dab tsi yog qhov kev tiv thaiv - khov heave thiab thaw kev daws teeb meem kev daws teeb meem rau kev rub rub tawm - tawm tsam hauv thaj tsam permafrost?
Spikes nyob rau hauv cheeb tsam permafrost txais yuav ob - txheej tiv thaiv - corrosion thiab thermal rwb thaiv tsev tsim ntawm kub -dip galvanizing + polyurethane thermal rwb thaiv tsev txheej. Qhov kub-dip galvanizing txheej thickness Ntau dua los yog sib npaug ntawm 85μm cais cov dej noo hauv permafrost los ntawm kev tiv thaiv kab mob thiab tiv thaiv electrochemical corrosion. Lub polyurethane thermal rwb thaiv tsev txheej thickness ntau dua los yog sib npaug li 30 hli, nrog thermal conductivity tsawg dua los yog sib npaug rau 0.02W / (m·K), tuaj yeem thaiv qhov cuam tshuam ntawm qhov kub thiab txias ntawm sab nraud ntawm qhov ntsia hlau loj thiab txo qhov kev puas tsuaj ntawm Frost heave quab yuam rau cov qauv tsim. Cov txheej txheem anchoring txais cov resin anchoring agent + low-kub curing technology. Cov resin anchoring tus neeg sawv cev tuaj yeem kho tau ib txwm nyob ntawm -20℃nrog lub sijhawm kho tsawg dua lossis sib npaug li 2 teev. Lub zog anchoring tsis cuam tshuam los ntawm qhov kub thiab txias, thiab qhov rub tawm - tawm lub zog tuav ntau dua lossis sib npaug li 95%. Ib txheej rwb thaiv tsev perlite nrog lub thickness Ntau dua los yog sib npaug li 50 hli tau ntim ib ncig ntawm qhov ntsia hlau loj kom tsis muaj zog ntxiv rau qhov cuam tshuam ntawm permafrost khov thiab thawing kev daws teeb meem thiab tsis txhob khov -thawing voj voog kev puas tsuaj rau cov av nyob ib ncig ntawm cov kab nrib pleb anchoring. Lub rub tawm - tawm quab yuam ntawm spikes yuav tsum tau rov kuaj dua ua ntej lub sijhawm khov -thawing txhua xyoo, nrog rau qhov piv txwv ntawm 5 ntsiab lus ib mais. Thaum lub rub tawm- tawm quab yuam txo qis dua los yog sib npaug li 10%, rov ua dua tshiab yuav tsum tau ua kom muaj kev nyab xeeb ntawm kev tsav tsheb thaum lub caij ntuj no.
Dab tsi yog lub luag haujlwm tseem ceeb ntawm kev txhim kho cov txheej txheem hauv kev txhim kho spike rub - tawm qhov tsis kam?
Lub hauv paus ntawm kev txhim kho cov txheej txheem kev txhim kho yog los hloov cov tshuaj sulfur anchoring nrog epoxy mortar anchoring. Lub zog compressive ntawm epoxy mortar Ntau dua los yog sib npaug rau 80MPa, ob npaug ntawm cov tshuaj sulfur mortar, thiab lub zog sib txuas nrog spikes Ntau dua lossis sib npaug rau 15MPa, zoo heev txhim kho kev tuav tuav. Cov txheej txheem epoxy mortar anchoring tau txais cov tshuab nplawm + siab grouting, uas tuaj yeem xyuas kom meej tias cov mortar mortar tau ntim densely tsis muaj qhov tsis xws luag xws li hollowing thiab qhov khoob, zam qhov teeb meem ntawm qhov tsis txaus mortar ntom los ntawm cov tsoos phau ntawv nchuav. Ua ntej anchoring, lub borehole yuav tsum tau ntxuav los ntawm siab - cua siab kom tshuab tawm plua plav hauv lub qhov. Plua plav residue yuav txo tau lub zog sib txuas los ntawm ntau tshaj 20%, thiab kev tu kom zoo ncaj qha txiav txim siab cov nyhuv anchoring. Tom qab grouting, kho yog xav tau rau ntau tshaj los yog sib npaug rau 7 hnub. Kev cuam tshuam cov ntsia hlau loj thaum kho yog nruj me ntsis txwv tsis pub kom cov mortar tau kho tag nrho thiab tsim cov qauv ruaj khov. Lub discreteness ntawm spike rub-tawm quab yuam tom qab kev kho dua tshiab tau txo qis heev, thiab tus nqi tsim nyog tau nce los ntawm 85% mus rau ntau dua 99%, ua tau raws li qhov yuav tsum tau ua ntawm kev ua haujlwm zoo.
Dab tsi yog cov txheej txheem tseem ceeb thiab ntawm - cov qauv kev lees paub ntawm qhov chaw rau spike rub - tawm qhov kev sim tawm tsam?
Cov txheej txheem tseem ceeb rau kev sib tw rub- tawm qhov kev sim tawm yog qhov zoo li qub rub tawm - tawm txoj kev sim, siv cov khoom siv digital rub- tawm lub tshuab kuaj nrog lub sijhawm thauj khoom ceev tswj ntawm 5kN / min, thauj khoom sib npaug kom txog thaum lub pob txha plam lossis puas, thiab sau qhov siab tshaj plaws rub - tawm dag zog. Thaum lub sij hawm sim, nws yog ib qho tsim nyog los xyuas kom meej tias qhov rub - tawm quab yuam yog coincident nrog lub spike axis, thiab lub deflection kaum tsawg dua los yog sib npaug rau 3℃. Ntau dhau deflection yuav ua rau qis rub - tawm qhov ntsuas qhov ntsuas, nrog qhov yuam kev txog li 15% lossis ntau dua. Cov qauv kev lees paub ntawm qhov chaw yog: qhov ntsuas qhov rub- tawm lub zog ntawm Qib 1 spikes Ntau dua lossis sib npaug rau 120kN, Qib 2 Ntau dua lossis sib npaug rau 80kN, Qib 3 Ntau dua lossis sib npaug rau 50kN, thiab rub- tawm quab yuam discrete sib npaug ntawm qhov sib npaug ntawm 1%. Kev soj ntsuam pom yuav tsum xyuas seb lub pob zeb pob zeb pob zeb puas tawg lossis tawg tawm. Cov kab nrib pleb uas muaj qhov ntev Ntau dua lossis sib npaug li 50mm raug txiav txim tias tsis tsim nyog thiab yuav tsum tau rov ua dua -anchored. Thaum txais tos, Ntau dua lossis sib npaug rau 10 spikes yog kuaj ib mais, thiab tus nqi tsim nyog Ntau dua lossis sib npaug rau 98% yog suav tias tsim nyog. Qhov tsis tsim nyog yuav tsum tau muab piv rau ob. Yog tias lawv tseem tsis tau tsim nyog, tag nrho cov seem yuav tsum tau rov ua haujlwm kom ntseeg tau tias qhov kev sib tw rub - tawm kev ua tau zoo raws li tus qauv.