Cov txheej txheem kev txhawb nqa ntawm cov kev tsheb nqaj hlau yog cov qauv sib zog ua haujlwm hauv kev ua haujlwm ruaj khov los ntawm kev sib tw ntev, thiab kev tswj cov txheej txheem tshuaj duab kom zoo nkauj.
Kev txhawb nqa qis tshaj yog cov subgrade . ua cov txheej txheem sib txuas rau cov khoom sib txuas lus thiab tiv thaiv kev sib haum xeeb thiab tiv thaiv kev sib haum xeeb .
Saum toj no cov lus sib cais tau dag lub pob zeb, tsim ntawm cov pob zeb tsoo lossis cov dej ntws rov qab, thiab nqus dej kom tsis txhob muaj dej hiav txwv
Nyob rau sab saum toj ntawm ballast yog cov neeg tsaug zog (lossis taug qab cov sawv zawg), uas hloov chaw ncaj qha txhawb nqa thiab hloov chaw tsaug zog zoo li pob zeb ua thiab ntoo; kev tsheb ciav hlau niaj hnub siv prestressed condressed fargers slabers rau lawv lub siab durability thiab ruaj khov.
Ntawm cov pw tsaug zog thiab cov nqaj hlau thiab cov nqaj hlau (e
Hauv cov xwm txheej tshwj xeeb, cov ciav hlau hauv cov choj thiab cov tunnels tau txais kev txhawb nqa los ntawm cov kabmob kev sib txuas {} Tus piv txwv pw tsaug zog ncaj qha rau girders ncaj qha; hauv cov tunnels, precast track txuas rau qhov pib hauv qab-kom tau txais kev txhawb nqa ruaj khov txawm tias nyob hauv qhov chaw kaw lus.
Cov txheej txheem hierarchical ua haujlwm ua ke . Lawv haum rau cov kev hloov pauv ntawm cov tsheb ciav hlau thiab kev ua haujlwm nrawm thiab kev ua haujlwm kom ruaj khov thiab ua haujlwm {}}
Gnee Rail Kev tsim kho tshuab kev lag luam thiab cov khoom lag luam ua kom tau zoo dua qub Cov kev pab {{2} Peb cov khoom siv tau dav hauv kev sib txuas hauv tsev thiab txhim kho kev nyab xeeb thiab kev txhim kho kev hloov tshiab thiab kev hloov tshiab.