Kev lim dej ntawm pawg yog cov tshuaj zoo tshaj plaws rau cov qauv tsim ntawm cov av tsis muaj zog lossis tsis ruaj khov. Lub hom phiaj tseem ceeb ntawm qhov kev tsim no yog los ua ke cov khoom siv thauj khoom mus rau hauv cov qauv monolithic, uas ua rau lub tsev ntxiv cov npoo ntawm kev nyab xeeb thiab kev ntseeg tau. Cov cuab yeej no muab rau lub xub ntiag ntawm cov khoom siv dag zog, txoj kab uas hla ntawm qhov sib txawv li ntawm 25-40 cm, tau tsav mus rau hauv av mus rau qhov tob ntawm 1.6-3 m.
Kev npaj ntawm lub hauv paus siv cov cuab yeej no muab cov qauv kev ntseeg siab thiab ruaj khov. Qhov no yog vim lub fact tias cov grillage ntawm pawg tuav thiab fastens ntsug load-bearing lug ua ke. Yog li, nws muab lub zog ntxiv rau cov qauv thiab tiv thaiv lub zog ntawm Frost heaving ntawm cov av. Cov pawg ua haujlwm rau grillage ntawm pawg muaj cov qauv kev txhawb nqa ntsug ntsia ntawm ib ntus ntawm ib mus rau ib thiab ib nrab metres, nyob ntawm seb hom av thiab qhov tob ntawm cov txheej khov.
txhawm rau nteg cov qauv no, qhov ntiav ntiav ntawm kwv yees li 30-40 cm yog khawb ib ncig ntawm tag nrho ib puag ncig ntawm cov phab ntsa tom ntej. Ib qho asbestos-cement yeeb nkab nrog lub pre-bonded reinforcing tawb yog qis rau hauv lub qhov. Tsis tas li ntawd, lub trench yog nteg tawm nrog geotextiles thiab them nrog xuab zeb. Formwork yog mounted ntawm lub resulting tog hauv ncoo. Tag nrho cov qauv yog tom qab ntawd nchuav nrog pob zeb, uas yog qhov xav tau heev.
Ntawm no nws yuav tsum tau siv lub vibrator tshwj xeeb los ua kom sib xyaw ua ke thiab tshem tawm cov npuas npuas uas pab tsim cov kab noj hniav ntawm ntau qhov feem. Qhov no tuaj yeem ua rau tawg ntawm cov qauv thiab kev tawg ntawm tag nrho lub tsev. Ib tug monolithic grillage ntawm pawg yuav tsum tau ntxiv dag zog kom nws resistant rau dabtsi yog khoov loads. Txwv tsis pub, ntawm qhov me me deformation, yuav muaj kev hem thawj ntawm pob zeb tawg.
Lub grillage yog ntxiv nrog ob txoj siv tawv tawv - sab sauv thiab qis, muaj ob peb lub longitudinal steel tuav, tus naj npawb ntawm cov nyob ntawm qhov loj, qhov siab ntawm cov qauv thiab hom av uas nws tau tsim. Qhov kev tsim no kuj tseem muaj zog ntxiv nrog kev txhawb nqa transverse, uas tsis siv lub nra, tab sis yog tsim nyog los khi tag nrho cov ncej rau hauv ib qho monolith.
Kev tsim kho loj niaj hnub siv cov khoom siv grillage xws li steel thiab prefabricatedreinforced pob zeb ua qauv ntawm qib M350 ntawm granite hauv paus. Thaum tsim cov tsev ntoo los ntawm ib lub bar, cov grillage feem ntau yog qis qis ntawm cov tuav, tso ncaj qha rau ntawm pawg. I-beams kuj tuaj yeem siv rau hauv lub peev xwm no. Muaj tseeb, qhov kev xaiv no kim dua.
Raws li cov txheej txheem thev naus laus zis tam sim no, cov hniav nyiaj hniav kub tuaj yeem siv rau hauv kev tsim kho ntawm cov tuam tsev cib, nrog rau hauv cov qauv ua los ntawm cov pob zeb aerated los yog ntoo pob zeb, txhim tsa ntawm av nplaum thiab cov av sib xyaw, ntawm cov av nruab nrab. ceev thiab siab dej saturation.
