1.1. General Requirements rau Bearing Installation

Cov kabmob yuav tsum tau muab ntsia tau zoo rau ntawm cov kabmob pedestals, qhov twg cov pob zeb muaj zog yuav tsum tsis txhob qis dua C40. Qhov siab sib txawv ntawm plaub fab ntawm lub pob zeb pob zeb saum npoo yuav tsum tsis pub tshaj 2 hli. Txhawm rau txhim kho kev txhim kho kom zoo, txij nkawm, thiab muaj peev xwm hloov cov kabmob, qhov siab ntawm lub pob zeb yuav tsum tsis pub tsawg dua 100mm.

1.2. Reserved Holes rau Anchor Bolts

Tshwj xeeb qhov rau thauj tog rau nkoj bolts yuav tsum tau prefabricated ntawm cov kabmob pedestal txoj haujlwm ntawm lub pier / abutment saum npoo. Txoj kab uas hla ntawm lub qhov ntsia liaj qhov rooj yuav tsum yog 60mm mus rau 80mm loj dua li ntawm cov khoom kho, thiab qhov tob ntawm lub qhov ntsia liaj qhov rooj yuav tsum yog 60mm mus rau 80mm ntau dua qhov ntev ntawm cov khoom kho. Txoj hauj lwm sib txawv ntawm qhov chaw nruab nrab thiab kab pheeb ces kaum ntawm qhov tshwj xeeb thauj tog rau nkoj bolt qhov yuav tsum tsis pub tshaj 10mm.

1.3. Kev tshuaj xyuas ua ntej kev teeb tsa cov kabmob

Txheeb xyuas qhov chaw cim ntawm qhov chaw nruab nrab ntawm cov kabmob sab saud. Thaum lub sij hawm installation kom raug, aligning nws raug nrog X-axis (longitudinal) thiab Y-axis (transverse). Lub bearing elevation yuav tsum ua raws li cov kev cai tsim.

Tshawb xyuas seb cov kabmob bolts thiab plua plav npog puas ruaj ntseg.

Xyuas kom tseeb tias tus lej batch sib raug rau cov kabmob sib xws nws cov specification.

Xyuas kom cov npoo ntawm cov kabmob sab saud thiab sab qis (uas yuav yog nyob rau hauv kev sib cuag nrog pob zeb lossis cement mortar) tsis muaj plua plav thiab roj stains.

Tshawb xyuas tias tus nqi ua ntej -deflection tus nqi ntawm cov kabmob txav tau sib npaug rau cov nqi teev rau cov kabmob ntawm qhov chaw ntawd.

1.4. Kev teeb tsa los ntawm Txoj Kev Sib Nqus Grouting

Chisel rau saum npoo ntawm cov kabmob pedestal kom nthuav tawm cov coarse aggregate, ua kom ruaj khov thiab tsis sib xws. Tshem cov khib nyiab los ntawm qhov preformed thiab ntub dej saum npoo ntawm cov kabmob pedestal nrog dej. (Thaum txhim kho cov bearings kom zoo ntawm txoj kev sib nqus grouting, kev tsim kho qhov siab ntawm lub pob zeb yuav tsum yog 25mm qis dua qhov siab tsim qauv.)

Nqa cov kabmob mus rau ntawm cov kabmob pedestal, thiab kho cov kabmob qhov siab thiab flatness siv cov bolts, nyias steel daim hlau, los yog nyias jacks.

Ua ntej sealing cov kabmob formwork, txhim kho lub funnel ntawm ib kawg ntawm cov yeeb nkab grouting thiab ntxig rau lwm kawg rau hauv lub qhov preformed. Nyob rau hauv qhov kev txiav txim ntawm lub ntiajteb txawj nqus, ncuav tsis yog -shrink epoxy grout rau hauv lub preformed qhov los ntawm lub funnel thiab grouting yeeb nkab, ces sai sai rub tawm cov yeeb nkab grouting. (Saib daim duab 1)

4) Tom qab ua tiav ntawm grouting rau hauv lub qhov preformed, tam sim ntawd kaw lub formwork nyob ib ncig ntawm cov kabmob. Ntxig cov yeeb nkab grouting mus rau qhov chaw nruab nrab hauv qab cov kabmob, thiab grout los ntawm qhov nruab nrab ntawm cov kabmob mus rau qhov chaw ib puag ncig. Thaum lub sij hawm grouting, siv lub vibrator kom compact lub mortar thiab tshem tawm cov pa npuas, kom ntseeg tau tias tag nrho cov qhov khoob yog puv nrog mortar. Lub mortar yuav tsum tau nchuav mus rau qhov siab 10mm saum toj no cov kabmob lub hauv paus phaj. (Saib daim duab 2)

Ua ntej grouting, xam qhov xav tau ntim ntawm mortar. Tus nqi tiag tiag ntawm mortar siv yuav tsum tsis txhob deviate heev ntawm tus nqi xam los tiv thaiv mortar tsis txaus nyob rau hauv nruab nrab. Thaum cov khoom siv grouting tau teem, tshem tawm cov formwork thiab cov hlau thaiv ntawm plaub fab. Tshawb xyuas qhov mortar to; Yog tias tsim nyog, kho cov chaw xau thiab sau qhov khoob uas tau muab tshem tawm los ntawm cov hlau thaiv nrog mortar.

Tsis txhob raug cov kabmob los cuam tshuam lossis ua lwm yam haujlwm saum toj no kom txog thaum lub epoxy mortar ncav cuag lub zog tsim.

Thaum tshem tawm ib ntus sab formwork, ua tib zoo tshuaj xyuas qhov chaw uas tsis yog -shrink epoxy grout kom paub tseeb tias tsis muaj kab nrib pleb.

Thaum lub epoxy mortar ncav cuag lub zog tsim, nruj lub thauj tog rau nkoj bolts, sai li sai tau tshem tawm cov kabmob cov khoom siv txuas ib ntus thiab kev txhawb nqa ib ntus. Thaum paub meej tias tag nrho cov bearings nyob rau hauv ib txwm ua haujlwm zoo, txhim kho cov kabmob plua plav kom zoo- cov khoom pov thawj.

5. Kev teeb tsa los ntawm Txoj Kev Siab Grouting

Ua ntej- txhim kho qhov zoo ntawm lub qhov taub ntawm sab ntawm cov kabmob pedestal, ua rau sab hauv ntawm lub qhov preformed.

Tshawb xyuas qhov saum npoo ntawm cov kabmob pedestal kom paub tseeb tias nws qhov siab ua tau raws li qib tsim, yog tiaj tus thiab du, thiab qhov siab sib txawv ntawm plaub lub kaum sab xis tsis tshaj 2 hli.

Siv ib txheej ntawm epoxy mortar rau saum npoo ntawm lub pob zeb. Thaum paub meej tias tus kabmob txoj haujlwm thiab qhov siab, muab cov kabmob rau hauv qhov chaw. Thaum cov kabmob raug muab tso rau, txheeb xyuas nws qhov chaw thiab qhov siab dua, tom qab ntawd ncuav tsis yog - ntsws epoxy grout rau hauv lub qhov preformed los ntawm grouting nozzles. Lub mortar yuav tsum tau sau kom txog rau thaum nws overflows los ntawm sab saum toj nto kom paub tseeb tias tag nrho compaction. Thaum lub mortar ncav cuag lub zog tsim, nruj lub thauj tog rau nkoj bolts, sai li sai tau tshem tawm cov kabmob cov khoom siv txuas ib ntus thiab kev txhawb nqa ib ntus. Thaum paub meej tias tag nrho cov bearings nyob rau hauv ib txwm ua hauj lwm zoo, txhim kho cov kabmob plua plav kom zoo- cov khoom pov thawj. (Saib daim duab 3)

1.6. Installation los ntawm Prefabricated Steel Phaj Method

Thaum cov txheej txheem prefabricated steel phaj yog siv rau kev txhim kho bearings kom zoo nyob rau hauv cam khwb cia-hauv- qhov chaw beams: Ib tug qis embedded steel phaj (nrog rau lub tes tsho qis txais ib lub tes tsho sab sauv) yuav tsum tau muab ntsia rau saum npoo ntawm lub pob zeb. Cov qhov tshwj xeeb yuav tsum tsuas yog prefabricated ntawm lub pier / abutment saum npoo, thiab tsis tas yuav tsum muaj qhov preformed ntawm cov kabmob pedestal txoj haujlwm.

Chisel rau saum npoo ntawm cov kabmob pedestal kom nthuav tawm cov coarse aggregate, ua kom ruaj khov thiab tsis sib xws. Tshem cov khib nyiab los ntawm qhov preformed qhov.

Txhim kho lub formwork rau cov kabmob pedestal, hoist lub qis embedded Cheebtsam ntawm cov kabmob mus rau sab saum toj ntawm lub pob zeb lub pob zeb steel reinforcement mesh, kho qhov qis embedded Cheebtsam, thiab kho lawv qhov siab thiab flatness.

Tshawb xyuas qhov saum npoo ntawm cov kabmob hauv qab cov khoom sib xyaw kom paub tseeb tias lawv qhov siab ua tau raws li qib tsim thiab qhov siab sib txawv ntawm plaub lub kaum sab xis tsis tshaj 2 hli.

Ncuav pob zeb rau cov kabmob pedestal (qhov kev tsim kho qhov siab ntawm lub pob zeb yuav tsum yog 10 hli siab tshaj qhov qub tsim qhov siab) thiab xyuas kom meej tias cov pob zeb npog qhov qis embedded steel phaj los ntawm 10mm. (Saib daim duab 4)

Thaum cov pob zeb ncav cuag lub zog tsim, rov- ntsuas qhov siab ntawm qhov saum npoo ntawm cov kabmob cov khoom siv qis qis siv ib theem kom paub tseeb tias cov kabmob qhov chaw thiab qhov siab yog qhov tseeb.

Txhim kho cov kabmob nyob rau saum npoo ntawm qis embedded steel phaj. (Saib daim duab 5)

Thaum cov kabmob raug ntsia tau zoo nyob rau hauv qhov chaw, tshem tawm cov kabmob tam sim ntawd cov khoom siv txuas ib ntus thiab kev txhawb nqa ib ntus. Thaum paub meej tias tag nrho cov bearings nyob rau hauv ib txwm ua haujlwm zoo, txhim kho cov kabmob plua plav kom zoo- cov khoom pov thawj.

1.7. Installation Specifications rau Bearings nyob rau hauv pob zeb qauv Beams

(Nrog rau cov kabmob ntawm cov kab hauv qab ntawm cov kab hluav taws xob precast nrog cov cam khwb cia-hauv- qhov chaw txuas nruab nrab ntawm cov kab nruab nrab)

Ua ntej, ncuav pob zeb rau cov piers thiab bearing pedestals. Prefabricate preformed qhov ntawm lub piers thiab bearing pedestals. Tshem cov khib nyiab los ntawm lub qhov preformed thiab xyuas kom meej saum npoo ntawm cov kabmob pedestal yog tiaj tus, du, thiab qhov siab sib txawv ntawm plaub fab tsis pub tshaj 2 hli.

Sib sau cov bearings nyob rau hauv lub Hoobkas, ua tib zoo theem lawv, dlhos lub sab sauv thiab sab Cheebtsam, thiab txuas cov bearings lub cev rau hauv ib chav tsev siv ib ntus kho daim hlau (kom tsis txhob loosening). Txuas cov kabmob thiab cov khoom siv sab saud / qis (nrog rau cov hlau txuas sab saud, sab sauv / qis thauj tog rau nkoj, thiab lub tes tsho sab saud / qis) rau hauv ib chav tsev siv thauj tog rau nkoj bolts. (Xwb, lub sab sauv thiab sab embedded Cheebtsam tej zaum yuav raug thauj nyob rau hauv nyias tej pob khoom thiab txuas mus rau hauv ib chav tsev thaum lub sij hawm bearing kom zoo installation.)

Ua ntej ntawm - qhov chaw teeb tsa kom zoo, tshawb xyuas qhov xwm txheej ntawm kev sib txuas ntawm cov kabmob thiab cov khoom sib txuas kom paub tseeb tias lawv zoo li qub thiab tsis loosened arbitrarily. Xyuas kom meej tias lub sab sauv embedded steel phaj nto yog nyob ze rau lub sab sauv bearing phaj, thiab xyuas kom meej cov bearing cov qhab nia thiab txhim kho kev taw qhia kom tsis txhob raug teeb meem.

Txhim kho cov kabmob sib xyaw ua ke rau saum npoo ntawm lub pob zeb. Thaum ua tib zoo xyuas cov kabmob qhov chaw thiab qhov siab, ncuav siab - lub zog tsis yog -shrink epoxy grout rau hauv lub qhov preformed siv ob txoj kev nqus grouting (Saib daim duab 1) los yog txoj kev siab grouting (Saib daim duab 3). Rau cam khwb cia-nyob rau hauv- qhov chaw kab teeb, txoj kev prefabricated steel phaj kuj tseem siv tau rau kev teeb tsa kom zoo.

Thaum lub epoxy mortar ncav cuag lub zog tsim, rov xyuas cov kabmob qhov chaw nruab nrab thiab qhov siab, tom qab ntawd nruj nreem rau sab sauv thiab sab nraub qaum.

Ntxuav lub sab sauv ntawm lub sab sauv embedded steel phaj, txhim kho lub ntsiab beam formwork kom zoo, thiab pib nrog lub ntsiab beam qhob pouring thiab lwm yam kev khiav hauj lwm.

Thaum lub hauv paus ntawm - qhov chaw poured pob zeb ncav cuag lub zog tsim, tshem tawm cov kabmob cov khoom siv txuas ib ntus thiab kev txhawb nqa ib ntus. Thaum paub meej tias tag nrho cov bearings nyob rau hauv ib txwm ua hauj lwm zoo, txhim kho cov kabmob plua plav- pov thawj cov cuab yeej.

1.8. Installation Specifications rau Bearings hauv Precast Beams

Muab pob zeb rau cov piers/abutments thiab bearing pedestals. Prefabricate preformed qhov ntawm lub piers / abutments thiab bearing pedestals. Tshem cov khib nyiab los ntawm lub qhov preformed thiab xyuas kom meej saum npoo ntawm cov kabmob pedestal yog tiaj tus, du, thiab qhov siab sib txawv ntawm plaub fab tsis pub tshaj 2 hli.

Sib sau cov bearings nyob rau hauv lub Hoobkas, ua tib zoo theem lawv, dlhos lub sab sauv thiab sab Cheebtsam, thiab txuas cov bearings lub cev rau hauv ib chav tsev siv ib ntus kho daim hlau (kom tsis txhob loosening). Txuas cov kabmob thiab cov khoom siv qis qis (nrog rau cov hlua khi hlua khi thiab lub tes tsho hauv qab) rau hauv ib lub tsev uas siv cov thauj tog rau nkoj qis dua. (Xwb, cov khoom yuav raug thauj mus rau hauv cov pob khoom sib cais thiab txuas rau hauv ib chav tsev thaum lub sij hawm kev teeb tsa kom zoo.) Cov khoom siv sab saud (xws li cov hlau txuas sab saud, cov khoom thauj tog rau nkoj sab saud, thiab lub tes tsho sab sauv) yuav tsum tau thauj mus rau hauv cov pob khoom sib cais.

Ua ntej ntawm - qhov chaw teeb tsa kom zoo, tshawb xyuas qhov xwm txheej ntawm kev sib txuas ntawm cov kabmob thiab cov khoom sib txuas kom paub tseeb tias lawv zoo li qub thiab tsis loosened arbitrarily. Xyuas cov kabmob cov cim thiab cov kev taw qhia kev teeb tsa kom raug kom tsis txhob raug teeb tsa tsis raug.

8.4 Ua ntej- txhim kho cov khoom siv sab saud (nrog rau cov hlau txuas sab saud, lub tes tsho sab saud, thiab cov pas nrig sab sauv) nyob rau hauv qab ntawm lub ntsiab nqaj precast. Lub flatness ntawm sab sauv embedded steel phaj nto yuav tsum tsis txhob ntau tshaj 1‰ ntawm qhov siab tshaj plaws dimension ntawm steel phaj. Yog tias yuav tsum tau muab txoj kab nqes hav, kho nws siv cov embedded steel phaj los yog beam leveling blocks kom paub tseeb tias lub hauv qab ntawm lub embedded steel phaj yog kab rov tav thaum lub sij hawm installation kom zoo. (Saib daim duab 6)

Nruab cov kabmob sib xyaw ua ke rau saum npoo ntawm lub pob zeb pad (Saib daim duab 7). Hoist lub beam precast rau ib txoj hauj lwm 20mm saum toj no bearing saum npoo. Thaum ua tib zoo xyuas qhov bearing txoj hauj lwm thiab qhov siab, ntsia hlau rau hauv lub thauj tog rau nkoj bolts rau qhov chaw ntawm lub nqaj. Ncuav siab -lub zog tsis yog- ntsws epoxy grout rau hauv lub qhov preformed siv txoj kev siab grouting (Saib daim duab 3).

Yog hais tias lub ntiajteb txawj nqus grouting txoj kev yog siv rau bearing kom zoo installation nyob rau hauv precast beams: Ua ntej, txhim kho jacks rau beam jacking ntawm lub pier / abutment. (Yog tias tsis muaj qhov chaw txhim kho kom zoo ntawm lub pier / abutment, teeb tsa kev txhawb nqa ib ntus.) Hoist lub beam precast (ua ntej kom zoo rau nruab cov kabmob, nruab nrog lub tes tsho qis thiab qis thauj tog rau nkoj, mus rau hauv qab beam siv lub thauj tog rau nkoj sab saud, thiab xyuas kom meej tias lub phaj sab saud steel phaj yog nyob ze nrog cov kabmob sab saud). Muab cov nqaj precast rau ntawm qhov kev txhawb nqa ib ntus, kho lub nqaj txoj hauj lwm thiab qhov siab ntawm cov jacks, tom qab ntawd ncuav siab - lub zog tsis yog -shrink epoxy grout rau hauv qhov khoob hauv qab cov kabmob thiab cov qhov preformed siv txoj kev nqus grouting (Saib daim duab 1).

Thaum lub epoxy mortar ncav cuag lub zog tsim, rov xyuas cov kabmob qhov chaw nruab nrab ntawm qhov chaw thiab qhov siab, ua kom nruj rau sab sauv thiab sab nraub qaum bolts, tshem tawm cov kabmob kev sib txuas ib ntus thiab kev txhawb nqa ib ntus. Thaum paub meej tias tag nrho cov bearings nyob rau hauv ib txwm ua haujlwm zoo, txhim kho cov kabmob plua plav kom zoo- cov khoom pov thawj.

1.9. Installation Specifications rau Bearings nyob rau hauv Steel Structure Beams

Thaum cov bearings yog siv rau steel qauv kab, cov bearings yuav tsum tau txuas nrog steel beams siv high-lub zog bolts, thiab rau cov piers/abutments siv thauj tog rau nkoj bolts, tes tsho, thiab thauj tog rau nkoj rods.

1) Kev npaj rau kev teeb tsa

Ua ntej txhim kho cov nqaj hlau, nqa cov kabmob thiab muab tso rau ntawm qhov ua ntej - txhim kho cov kabmob traversing slideway ntawm ib sab ntawm cov kabmob pedestal.

Kos lub longitudinal thiab transverse centerlines nyob rau saum npoo ntawm cov kabmob pedestal, thiab rov- ntsuas qhov siab ntawm cov kabmob pedestal.

Tshawb xyuas qhov chaw ntawm cov kabmob pedestal, chisel nws kom roughen saum npoo, thiab xyuas seb qhov chaw thiab qhov tob ntawm lub qhov preformed ua tau raws li qhov yuav tsum tau ua. Yog tias tsis yog, kho tam sim ntawd, ces ntxuav cov khib nyiab los ntawm qhov preformed qhov.

2) Jack Kev Npaj

Teem cov jacks ntawm txoj haujlwm ncaj qha hauv qab ntawm qhov nruab nrab ntawm txhua qhov ntawm hauv qab ntawm cov nqaj hlau. Cov jacks no yuav ua lub luag haujlwm tseem ceeb rau jacking steel beam, kom ntseeg tau tias muaj zog sib faib ntawm txhua lub ntsiab lus.

Teem ib lub jack sab nraum qhov chaw ntawm txhua lub ntsiab truss node los kho qhov sib npaug ntawm cov nqaj hlau thaum lub jacking.

Teem ib lub jack nyob rau sab transverse ntawm lub rooj zaum zawv zawg (los yog qhov chaw txhawb nqa ib ntus) ntawm txhua sab laug thiab sab xis los kho txoj haujlwm hla ntawm cov nqaj hlau.

3) Kev kho ntawm Steel Beam Plane Position

Thaum lub sij hawm lub longitudinal traction ntawm steel beam, kho nws longitudinal txoj hauj lwm nyob rau hauv [tshwj xeeb kam rau ua, piv txwv li, X] mm. Thaum txhim kho plaub lub nodes, rov- kho cov nqaj hlau txoj haujlwm dav hlau.

Nias lub jacks hauv qab lub ntsiab nodes ib txhij, sib npaug, thiab maj mam. Meanwhile, tswj cov jacks hauv qab nodes kom stabilize thiab theem steel beam. Nres jacking thaum lub rooj zaum zawv zawg ntawm lub pob yog nqa 2cm tawm ntawm qhov chaw. Kho qhov siab ntawm lub rooj zaum zawv zawg saum npoo ntawm txhua qhov mus rau 2cm siab tshaj qhov tsim tsa siab (xav txog qhov ua ntej- camber), tom qab ntawd muab cov hlau tsis muaj steel hlau thiab PTFE (polytetrafluoroethylene) zawv zawg daim hlau rau saum npoo ntawm lub rooj zaum zawv zawg (siv cov roj lubricating ntawm lawv).

Txo cov jacks kom tso cai rau cov rooj zaum zawv zawg (nruab nrab nrog cov hlau tsis muaj steel hlau thiab PTFE zawv zawg daim hlau) los tuav lub nra, xyuas kom cov jack saum tau tshem tawm ntawm qhov chaw. Raws li txoj hauj lwm ntawm plaub -node steel beam, thiab nyob rau hauv kev saib xyuas ntawm pab neeg soj ntsuam, jacks li jacks teem nyob rau hauv lub transverse sab ntawm sab laug thiab sab xis ntawm zawv zawg rooj zaum kom raug kho steel beam txoj hauj lwm dav hlau. Lub dav hlau txoj hauj lwm sib txawv yuav tsum tau tswj tsis pub dhau 1cm.

4) Kev teeb tsa ntawm Steel Beam Bearings

Hla mus thiab tso cov kabmob (tso nyob ib sab ntawm lub pob zeb pad) siv cov saw thaiv.

Hoist cov kabmob (nrog rau tag nrho cov khoom txuas ib ntus) siv cov saw thaiv kom nws ze ze rau cov nqaj hlau. Lub caij no, sau qhov sib txawv hauv qab phaj ntawm cov kabmob nrog cov ntoo boards kom ruaj ntseg.

Drive drift pins to align the bolt holes of the steel beam and the bearing, then tighten the high-strength bolts connecting the bearing and the steel beam.

Tshem tawm cov rooj ntoo. Raws li qhov ua ntej - cim longitudinal thiab transverse centerlines ntawm cov kabmob pedestal, kho kom raug lub dav hlau txoj hauj lwm ntawm cov kabmob lub hauv paus phaj. Lub caij no, nyob rau hauv kev saib xyuas ntawm pab pawg soj ntsuam, kho qhov siab ntawm lub hauv paus phaj qis raws li tus qauv tsim los yog kev soj ntsuam cov kev xav tau ntawm kev suav, thiab qib qis hauv qab phaj kom paub tseeb tias qhov siab sib txawv ntawm plaub fab raws li cov cai.

Nruab lub grouting formwork thiab ua lub ntiajteb txawj nqus grouting ntawm lub preformed qhov thiab hauv qab ntawm lub hauv qab ntawm cov bearing puag phaj (Saib daim duab 1 thiab daim duab 2). Thaum lub pob zeb grouted ncav cuag lub zog tsim, tshem tawm cov kabmob sib txuas ib ntus, siv cov jacks los nqa cov nqaj hlau los ntawm kwv yees li 5 hli, tshem tawm cov ntsiab lus txhawb nqa ib ntus (lossis zawv zawg rooj), thiab maj mam txo cov nqaj hlau kom hloov cov khoom thauj mus rau cov kabmob, ua kom tiav cov kev hloov pauv hloov pauv.

5) Kev kho ntawm Steel Beam Elevation

Yog tias qhov kev hloov kho siab yuav tsum tau muab: Ib ntus txuas cov kabmob mus rau hauv ib chav tsev, loosen cov bolts txuas ntawm cov kabmob thiab cov nqaj hlau. Nias lub jacks hauv qab nodes ib txhij, sib npaug, thiab maj mam. Meanwhile, tswj cov jacks hauv qab nodes kom stabilize thiab theem steel beam. Nres jacking thaum qhov sib txawv ntawm cov hauv qab node thiab cov kabmob saum toj txog 2cm.

Nyob rau hauv kev saib xyuas ntawm pab neeg soj ntsuam, kho qhov siab ntawm qhov siab - kho steel phaj los yog cov cuab yeej zoo ntsia tau rau ntawm cov kabmob saum npoo ntawm txhua qhov raws li tus qauv tsim (xav txog qhov ua ntej - camber). Tom qab ntawd txo cov jacks kom tso cai rau cov kabmob thiab qhov siab - kho steel daim hlau kom sib koom ua ke thauj khoom.

Tshem cov jacks kom tiav qhov kev hloov kho qhov siab.

Bearings yuav tsum tau tshuaj xyuas thiab tswj xyuas tsis tu ncua thaum lub sijhawm ua haujlwm, ua raws li cov cai ntawm Clause 4.9 hauv JTG H11-2004 Txoj Cai rau Kev Saib Xyuas Txoj Kev Loj thiab Culverts.

Tsis pub dhau peb lub hlis tom qab qhov project tiav thiab muab tso rau hauv kev ua haujlwm, tshuaj xyuas cov kabmob tam sim kom paub tseeb tias lawv nyob rau hauv kev ua haujlwm zoo thiab raug kaw zoo.

Ua lwm txoj kev kuaj xyuas hauv ib xyoos ntawm kev pabcuam. Yog tias pom muaj teeb meem, txheeb xyuas cov laj thawj thiab kho tam sim ntawd.

Ua cov txheej txheem tshuaj xyuas txhua xyoo nyob rau xyoo thib ob thiab thib peb ntawm kev pabcuam.

Ib zaug peb xyoos, cov bearings feem ntau yuav nyob rau hauv ib qho chaw ua haujlwm ruaj khov. Cov txheej txheem tshuaj xyuas tom ntej tuaj yeem ua raws li qhov xwm txheej tiag tiag, ua raws li cov lus hauv qab no:

Cov lus: Kev tshuaj xyuas, kev ntsuam xyuas, thiab kev saib xyuas cov lus qhia rau Choj Bearings

Ua ntej kev teeb tsa kom zoo, ua tib zoo xyuas seb cov kabmob qhov tshwj xeeb, qauv, hom zawv zawg, thiab kev hloov pauv hloov raws li cov qauv tsim tau teev tseg hauv tus choj layout daim duab. Nyob rau tib lub sijhawm, tshuaj xyuas seb cov kabmob cov kabmob sib txuas ib ntus puas xoob thiab seb cov xim pleev xim puas puas lawm. Xyuas kom txhua qhov ntsuas kev ua tau zoo ntawm cov kabmob nyob rau hauv qhov zoo.

Tam sim ntawd tom qab tshem tawm cov kabmob cov khoom sib txuas ib ntus, kaw lub qhov ntsia hlau nrog tiv thaiv - roj roj. (Kev ua tsis tiav yuav ua rau xeb hauv lub qhov ntsia liaj qhov rooj, maj mam corroding cov xim tiv thaiv -corrosion txheej nyob ib ncig ntawm lub bolt qhov, thiab thaum kawg ua rau cov kabmob tiv thaiv -corrosion system, ua rau tag nrho xeb ntawm cov kabmob.)

Yog tias cov nplaim hluav taws yuav tsum tau muab tshem tawm cov khoom siv sib txuas ib ntus, siv cov nplaim hluav taws- cov khoom siv hluav taws xob los tiv thaiv thiab tiv thaiv lub cev tiv thaiv kom tsis txhob kub hnyiab. Tsis txhob cua sov lub cev steel:

(1) Thaum tshav kub kub tuaj yeem ua rau cov xim zaj duab xis tawg, ncaj qha ua rau cov kabmob tiv thaiv - kev ua haujlwm corrosion;

(2) Kev kub siab tuaj yeem hloov kho cov qauv sab hauv ntawm lub cev steel, ua rau nws qhov kev ua tau zoo thiab ua rau tawg lossis puas tsuaj. Yog hais tias tus kabmob cov xim pleev xim ntog puas lawm, kho tam sim ntawd.

Thaum cov kabmob txhim kho kom zoo, ntxuav tag nrho cov khoom raug tiv thaiv kom tsis txhob muaj pob zeb tawg los ntawm kev kis kab mob ntawm lub cev (uas yuav ua rau nws tsis zoo rau kev tiv thaiv- kev ua haujlwm corrosion). Kov cov xim pleev xim thaum lub sij hawm tsim kho nrog cov tshuaj tiv thaiv - xeb xim thiab topcoat.

Ua ntej txhim kho cov kabmob enclosure kom zoo, ua tib zoo so lub stainless hlau zawv zawg nto nrog paj rwb xov los tiv thaiv plua plav lossis lwm yam khib nyiab los ntawm kev hnav khaub ncaws -cov phaj resistant. (Plua plav lossis khib nyiab ntawm qhov hnav- cov phaj resistant tuaj yeem khawb cov hlau tsis huv, ua kom cov kabmob ua haujlwm tsis zoo lossis ua rau tsis ua haujlwm, thiab ua rau lub neej ua haujlwm luv luv ntawm kev hnav- cov phaj resistant thiab stainless hlau.)

Thaum txhim kho cov kabmob enclosure kom zoo, ntxuav cov kabmob pedestal. Xyuas kom lub pob zeb nto yog tiaj tus, tsis muaj cov khib nyiab thiab dej sawv ntsug, thiab khaws cia kom huv si thiab qhuav.

Thaum cov kabmob txhim kho kom zoo, npog cov kabmob txhawm rau tiv thaiv cov dej los nag kom txog rau thaum cov kab hluav taws xob ntsuas dej ua tiav.