Ib. Txoj kev kho ntawm cov pob zeb zoo tib yam tawg
1. Kho qhov chaw
Feem ntau siv cov txheej txheem suav nrog kev sib cog lus thiab smoothing, daim ntawv thov ntawm epoxy nplaum, txau ntawm cov cement mortar los yog cov pob zeb zoo, nias thiab siv epoxy mastic, epoxy resin pasting off-duty silk ntaub, ua rau tag nrho saum npoo txheej, thiab suturing ntawm steel thauj tog rau nkoj bolts. . Nto smearing thiab nto patching txoj kev Scope ntawm daim ntawv thov ntawm nto smearing yog nyias thiab ntiav cov kab nrib pleb uas yog ib qho nyuaj rau ncuav rau hauv grout, hairline kab nrib pleb uas nws qhov tob tsis ncav cuag qhov chaw ntawm lub steel bar, kab nrib pleb uas tsis to, tawg uas ua. tsis ncab thiab tawg uas tsis ua haujlwm lawm. Qhov chaw thaj chaw (geomembrane lossis lwm cov ntawv tsis muaj dej tsis muaj dej) txoj kev yog tsim rau kev tiv thaiv seepage thiab ntsaws cov dej loj loj (honeycomb pockmarked nto, thiab lwm yam. los yog nws yog ib qho nyuaj rau kev txiav txim siab txog qhov tshwj xeeb to thiab deformation sib koom ua ke).
2. Txoj kev kho ib nrab:
Cov kev siv feem ntau suav nrog txoj kev sau, txoj kev prestressing, ib nrab chisel tshem tawm thiab rov nchuav cov pob zeb, thiab lwm yam.
Sau cov kab nrib pleb ncaj qha nrog cov ntaub ntawv kho, feem ntau yog siv los kho cov kab nrib pleb dav, kev ua haujlwm yooj yim thiab tus nqi qis. Rau cov kab nrib pleb uas muaj qhov dav tsawg dua 0.3 hli thiab qhov tob tob, lossis cov kab nrib pleb nrog cov khoom ntim, cov kab nrib pleb uas nyuaj rau kev ua tiav nrog grouting, thiab cov kab nrib pleb me me, kev kho yooj yim tuaj yeem ua tau los ntawm kev qhib V-shaped grooves thiab tom qab ntawd sau lawv.
3. Cement siab grouting txoj kev
Nws yog tsim rau stitching ruaj khov kab nrib pleb nrog ib tug dav Ntau tshaj los yog sib npaug rau 0.5mm.
Txoj kev no muaj ntau yam kev siv, los ntawm cov kab nrib pleb me me mus rau cov kab nrib pleb loj, thiab cov nyhuv kho tau zoo. Siv cov cuab yeej pub mis siab (siab {{0}}}.2 ~ 0.4Mpa) txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau ua tiav lub hom phiaj ntawm occlusion. Txoj kev no yog ib txoj kev ib txwm siv thiab cov nyhuv zoo heev. Koj tuaj yeem siv cov nplaum sib koom ua ke los txhaj cov kua nplaum sib koom ua ke rau hauv cov kab nrib pleb uas tsis muaj hluav taws xob, uas yooj yim heev thiab cov nyhuv zoo tagnrho.
4. Tshuaj grouting
Nws tuaj yeem nchuav rau hauv cov kab nrib pleb uas muaj qhov dav tawg ntau dua lossis sib npaug rau 0.05mm.
5. Txo lub zog sab hauv ntawm cov qauv
Cov kev siv feem ntau suav nrog kev tshem tawm lossis tswj cov khoom thauj, teeb tsa cov qauv thauj khoom, thiab ntxiv cov fulcrums lossis kev txhawb nqa. Hloov cov kab hluav taws xob yooj yim rau cov kab hluav taws xob txuas ntxiv, thiab lwm yam.
6. Cov qauv kev txhawb nqa
Cov kev siv feem ntau suav nrog kev ntxiv steel tuav, thickening slabs, outsourcing reinforced concrete, outsourcing steel, pasting steel plates, prestressed reinforcement systems, etc.
Txoj kev txhim kho cov txheej txheem tuaj yeem siv rau cov kab nrib pleb uas tshwm sim los ntawm overload, txo cov pob zeb durability tshwm sim los ntawm cov kab nrib pleb tsis tau kho rau lub sijhawm ntev, thiab cov kab nrib pleb tshwm sim los ntawm hluav taws, uas cuam tshuam rau lub zog ntawm cov qauv. Nrog rau txoj kev txhawb nqa seem, txoj kev thauj tog rau nkoj, txoj kev prestressing, thiab lwm yam. core sampling xeem; kev ntsuas dej siab; huab cua ntsuas, thiab lwm yam.
7. Hloov cov qauv txheej txheem thiab ntxiv dag zog rau tag nrho cov rigidity
Piv txwv li: cov kab nrib pleb nyob rau hauv tus ncej yog daws nrog los ntawm kev ntxiv partitions thiab sib sib zog nqus beams.
8. Txoj kev hloov pob zeb
Kev hloov pob zeb yog ib txoj hauv kev zoo ntawm kev cuam tshuam nrog cov pob zeb puas loj los ntawm kev tshem tawm cov pob zeb ua ntej thiab tom qab ntawd hloov nrog cov pob zeb tshiab lossis lwm yam khoom siv. Feem ntau siv cov khoom siv hloov pauv yog: cov pob zeb zoo tib yam lossis cov cement mortar, polymer lossis hloov polymer pob zeb lossis mortar.
9. Electrochemical tiv thaiv txoj kev
Electrochemical anti-corrosion yog siv cov electrochemical kev txiav txim ntawm daim ntawv thov hluav taws xob nyob rau hauv nruab nrab los hloov ib puag ncig lub xeev ntawm pob zeb los yog reinforced pob zeb thiab passivate cov hlau tuav kom ua tiav lub hom phiaj ntawm kev tiv thaiv corrosion. Kev tiv thaiv Cathodic, chlorine ntsev extraction, thiab alkaline rov qab yog peb txoj hauv kev siv thiab siv tau zoo hauv kev tiv thaiv tshuaj. Qhov kom zoo dua ntawm txoj kev no yog tias txoj kev tiv thaiv tsis tshua muaj kev cuam tshuam los ntawm ib puag ncig, thiab nws yog qhov tsim nyog rau lub sijhawm ntev los tiv thaiv corrosion ntawm steel tuav thiab pob zeb, thiab tuaj yeem siv rau ob qho tib si tawg thiab cov qauv tshiab.
10. Bionic txoj kev kho tus kheej
Txoj kev kho tus kheej bionic yog ib txoj kev kho kab mob tshiab, uas ua raws li kev ua haujlwm ntawm cov ntaub so ntswg kom cia li tso qee yam tshuaj mus rau qhov raug mob, kom qhov chaw raug mob tuaj yeem kho tau, thiab qee cov khoom tshwj xeeb tau ntxiv rau cov tsoos tshuaj. pob zeb (xws li kua core fibers lossis capsules uas muaj cov binders), ib qho kev txawj ntse bionic nws tus kheej kho neural network system yog tsim nyob rau hauv cov pob zeb, thiab thaum cov kab nrib pleb tshwm nyob rau hauv cov pob zeb, ib feem ntawm cov kua core fibers yog secreted los ua kom cov kab nrib pleb zoo. .
11. Lwm txoj kev
Cov kev siv feem ntau suav nrog kev rhuav tshem thiab rov ua dua, txhim kho cov kev pabcuam ntawm cov qauv, dhau kev xeem lossis kev tshuaj xyuas thiab ua qauv qhia yam tsis muaj kev kho mob, thiab lwm yam.
2. Yog vim li cas rau pawg pob zeb tawg:
Hauv cov pob zeb loj, vim qhov loj ntawm cov qauv thiab cov cement ntau siv, cov cua sov ntawm cov dej tso tawm los ntawm cov cement hydration yuav ua rau kub kub hloov thiab shrinkage, thiab qhov tshwm sim ntawm qhov kub thiab txias shrinkage kev ntxhov siab yog lub ntsiab ua rau cov kab nrib pleb hauv cov pob zeb ntxiv. . vim li cas. Muaj ob hom kab nrib pleb: nto tawg thiab los ntawm cov kab nrib pleb. Cov kab nrib pleb yog tshwm sim los ntawm qhov sib txawv ntawm cov cua sov dissipation ntawm qhov chaw thiab sab hauv ntawm cov pob zeb. Qhov kub tsis tshua muaj sab nraud thiab sab hauv siab, ua rau qhov kub thiab txias, uas ua rau muaj kev ntxhov siab hauv cov pob zeb thiab tensile kev nyuaj siab ntawm qhov chaw. Lub tensile kev nyuaj siab ntawm qhov chaw tshaj qhov tensile lub zog ntawm cov pob zeb.
Qhov kev sib tsoo yog vim qhov tensile kev nyuaj siab tshwm sim los ntawm qhov deformation los ntawm qhov txias ntawm cov pob zeb thaum lub zog ntawm cov pob zeb loj nce mus txog ib theem, ntxiv rau qhov ntim shrinkage thiab deformation los ntawm kev poob dej hauv cov pob zeb, thiab yog constrained los ntawm lub hauv paus thiab lwm yam structural ciam teb tej yam kev mob. Kev tawg los ntawm tag nrho cov ntu ntu uas yuav tshwm sim thaum lub zog tensile ntawm cov pob zeb dhau lawm. Ob hom kab nrib pleb no yog tag nrho cov kab nrib pleb puas tsuaj mus rau qhov sib txawv.
Thaum ntxov shrinkage ntawm high-strength pob zeb yog loj. Qhov no yog vim tias 30 feem pua ~ 60 feem pua cov ntxhia pob zeb raug siv los hloov cov cement hauv cov pob zeb muaj zog. Qhov piv yog 0.25 ~ 0.40, uas txhim kho lub microstructure ntawm pob zeb thiab coj ntau yam zoo heev rau cov pob zeb muaj zog, tab sis qhov tseem ceeb tshaj plaws tsis zoo yog qhov nce ntawm qhov tshwm sim ntawm pob zeb shrinkage tawg. Lub shrinkage ntawm high-strength pob zeb yog tsuas yog qhuav shrinkage, kub shrinkage, yas shrinkage, tshuaj shrinkage thiab autogenous shrinkage.
Lub sij hawm ntawm cov pob zeb tawg tuaj yeem siv los txiav txim qhov ua rau ntawm cov kab nrib pleb: cov kab nrib pleb ntawm cov yas tuaj yeem tshwm sim li ob peb teev mus rau kaum teev tom qab nchuav; kub shrinkage tawg tshwm li 2 mus rau 10 hnub tom qab pouring; autogenous shrinkage feem ntau tshwm sim tom qab pob zeb hardens Los ntawm ob peb hnub mus rau kaum ob hnub; qhuav shrinkage tawg tshwm nyob rau hauv ib lub sij hawm ze li ntawm 1 xyoos.
1. Drying shrinkage:
Thaum cov pob zeb poob cov dej adsorbed nyob rau hauv lub pores thiab gel pores nyob rau hauv cov huab cua unsaturated, nws yuav ntsws. Lub porosity ntawm cov pob zeb ua haujlwm siab yog qis dua li cov pob zeb zoo tib yam, yog li tus nqi shrinkage kuj tsawg.
2. Yas shrinkage:
Yas shrinkage tshwm sim thaum lub sij hawm yas ntawm qhob ua ntej nws hardens. High-strength pob zeb muaj qhov sib piv ntawm cov dej-rau-binder, tsis muaj dej noo tsawg, thiab cov ntxhia pob zeb zoo sib xyaw yog cov rhiab heev rau dej. High-strength qhob yeej tsis los ntshav, thiab qhov saum npoo poob dej sai, yog li cov yas shrinkage ntawm high-strength pob zeb yog yooj yim dua li cov pob zeb zoo tib yam. .
3. Tus kheej shrinking:
Tus txheeb ze av noo nyob rau hauv lub kaw pob zeb txo qis nrog kev nce qib ntawm cement hydration, uas yog hu ua self-drying. Kev ziab nws tus kheej ua rau cov dej hauv capillary tsis txaus thiab ua rau lub siab tsis zoo, yog li ua rau nws tus kheej shrinkage ntawm cov pob zeb. Vim tias qhov sib piv ntawm cov dej tsis tshua muaj zog ntawm cov pob zeb muaj zog thiab kev txhim kho sai ntawm lub zog thaum ntxov, cov dej dawb yuav raug siv sai, ua rau cov txheeb ze av noo hauv qhov pore system qis dua 80 feem pua. Self-shrinking.
Nyob rau hauv tag nrho cov shrinkage ntawm high-strength qhob, qhuav shrinkage thiab autogenous shrinkage yuav luag sib npaug, thiab qhov qis dua cov dej-binder ratio, qhov ntau dua qhov feem ntawm autogenous shrinkage. Nws txawv kiag li ntawm cov pob zeb zoo tib yam. Ordinary qhob yog feem ntau qhuav shrinkage, thaum lub siab-lub zog pob zeb yog feem ntau nws tus kheej-shrinking.
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4. Kub shrinkage:
Rau cov pob zeb uas xav tau lub zog siab, cov cement yog qhov loj, qhov kub ntawm cov dej yog qhov loj, thiab qhov kub ntawm qhov nce kuj tseem loj, feem ntau mus txog 35 ~ 40 degree, thiab qhov siab tshaj plaws kub tuaj yeem tshaj 70 ~ 80 degree. thaum pib qhov kub thiab txias ntxiv. Feem ntau, thermal expansion coefficient ntawm pob zeb yog 10 × 10-6 / degree, thiab thaum kub poob 20 ~ 25 degree, qhov txias shrinkage yog 2 ~ 2.5 × 10-4, thaum qhov kawg tensile tus nqi ntawm pob zeb. tsuas yog 1 ~ 1.5 × 10- 4. Yog li ntawd, txias shrinkage feem ntau ua rau pob zeb tawg.
5. Chemical shrinkage:
Tom qab cov cement yog hydrated, qhov ntim ntawm cov khoom theem nce, tab sis qhov ntim ntawm cov cement-dej system txo qis, ua rau ntau qhov capillary pores thiab tawg. Cov dej-binder ratio ntawm high-strength pob zeb yog me me, thiab cov degree ntawm hydration yog txwv tsis pub los ntawm kev sib ntxiv ntawm nplua ntxhia admixtures. Cov tshuaj shrinkage ntawm high-strength pob zeb yog tsawg dua li ntawm cov pob zeb zoo tib yam. Thaum cov pob zeb me me thiab raug txwv sab nraud lossis sab hauv, tensile stresses tsim thiab tuaj yeem ua rau tawg. Txawm hais tias cov pob zeb muaj zog muaj zog tensile siab, nws cov elastic modulus kuj siab. Nyob rau hauv tib lub shrinkage deformation, nws yuav ua rau siab tensile kev nyuaj siab, thiab vim tsis muaj creep muaj peev xwm ntawm high-strength pob zeb, qhov kev nyuaj siab so me me, yog li tsis zoo tawg kuj.
