Av Anchor Rau Railway
Feb 17, 2023| av thauj tog rau nkojrau railway:
Ib tug prestressed groutedav thauj tog rau nkojyog ib qho khoom siv nruab rau hauv av lossis pob zeb uas yog siv los xa cov khoom siv tensile rau hauv av. Grouted av anchors, hais yooj yim raws li av thauj tog rau nkoj, yog ntsia rau hauv grout puv laum qhov. Grouted av anchors kuj raug hu ua "tiebacks". Lub hauv paus ntsiab lus ntawm grouted av thauj tog rau nkoj muaj xws li:
thauj tog rau nkoj;
free stressing (unbonded) ntev;
daim ntawv cog lus ntev.
Cov no thiab lwm yam khoom ntawm lub thauj tog rau nkoj hauv av yog qhia schematically nyob rau hauv daim duab 1. Lub anchorage yog kev sib koom ua ke ntawm lub taub hau thauj tog rau nkoj, bearing phaj, thiab trumpet uas muaj peev xwm kis tau tus prestressing quab yuam los ntawm prestressing steel (bar los yog strand) rau hauv av. nto los yog cov qauv txhawb nqa.
Dab tsi yog cov ntsiab lus tseem ceeb ntawm railway subgrade prestressed thauj tog rau nkoj cable siv? 1. Prestressed thauj tog rau nkoj cable yuav siv tau rau cov av thiab pob zeb txheej ntawm txoj kab nqes thiab lub hauv paus qhov cuab lub zog, nws cov anchoring seem yuav tsum tau muab tso rau hauv cov pob zeb ruaj khov txheej, 2. Lub prestressed thauj tog rau nkoj cable yuav tsum tau ua los ntawm steel strand nrog siab zog thiab tsis tshua muaj so. Lub steel strand yuav tsum ua raws li lub teb chaws tus qauv tam sim no rau steel strand siv nyob rau hauv prestressed pob zeb. Cov khoom siv cable nrog kev puas tsuaj, xeb loj, hluav taws xob hlawv thiab lwm yam ua rau lub zog txo qis yuav tsum tsis txhob siv hauv kev tsim kho. 3. Cov txheej txheem ntawm kev tsim kho ntawm cov hlua khi prestressed yog qhov ua, cable loading, grouting, ces siab phaj (los yog pawg, nqaj), thiab thaum kawg nro thiab qhov sealing. 4. Thaum ua cov phaj siab (piles thiab kab teeb), sab saum toj ntawm lub cushion pier yuav tsum du, ruaj, thiab perpendicular mus rau axis ntawm lub qhov drilling; Lub axis ntawm pier qhov yuav tsum sib tshooj nrog lub axis ntawm qhov drilling. Grouting qhov thiab qhov vents yuav tsum tau tshwj tseg ib sab ntawm lub cushion pier. 5. Kev ntsuam xyuas thiab kev soj ntsuam ntawm kev ua tau zoo ntawm cov khoom siv thauj tog rau nkoj prestressed yuav tsum tau ua raws li cov qauv tsim.