1. Dab tsi yog lub luag haujlwm ntawm kev sib tsoo sib tsoo hauv kev tswj cov qauv kev tsheb ciav hlau txawv?
Sib tsoo restores profile thiab tshem tawm tej yam tsis xws luag kom tshem tawm cov kev sib tsoo, thaum} {} {} {. URban Lub teeb ntsia hlau ntau zaus (txhua 6 lub hlis) kom txo cov suab nrov los ntawm kev sib tsoo los ntawm kev sib tsoo thiab kev sib npaug.
2.}} Txoj kev tsheb ciav hlau yuav cuam tshuam li cas nrog kev siv cov khoom ntim (tsheb nqaj hlau)?
Rail lub taub hau dav yuav tsum tau phim lub log Flange: ib lub taub hau ({} Lub taub hau ua rau muaj kev phom sij ntev dhau los lossis kev sib txawv ntawm txoj kev tsheb ciav hlau feem ntau siv cov hlua khi sib txawv hauv cov cheeb tsam hloov pauv hauv cov cheeb tsam hloov pauv hauv cov cheeb tsam hloov pauv hauv cov cheeb tsam hloov pauv hauv cov cheeb tsam hloov pauv hauv kev hloov chaw {14
3. Dab tsi yog qhov sib txawv ntawm cov nqaj hlau siv hauv ballasted vs {1} ballastless lem?
Ballasted track rails (feem ntau cov kab dav dav) muaj cov kab ke uas muaj qhov hnyav ( Ballasted rail zam lub misalignment me me vim muaj kev hloov kho tau zoo dua siv ntau dua-zog hlau los tiv taus cov kev txwv ruaj khov.
4.}} Yuav ua li cas kev tsheb ciav hlau hauv Brazil (ABNT) chaw nyob chaw nyob muaj kev sib tw nyab xeeb?
Assio Brasileira de Normas técnicas (ABNT) Kev Tiv Thaiv Cov Khoom Siv Hluav Taws Xob -}} Kuv muaj qhov kub me Kev ruaj khov ntawm cov av av nyom tau mus rau o {9} Age} ABNT ua ntej weldility rau cov chaw uas muaj los nag, uas tuaj yeem daws ballast ncig ua ke.
{{0 {}} Dab tsi yog qhov tseem ceeb ntawm kev rail tensile zog hauv kev siv lub zog sib txawv?
Tensile strength (minimum 880MPa for high-speed rails) resists pulling forces from thermal expansion and train acceleration. Heavy-haul rails require 900-1000MPa to withstand 30-ton axle loads, while light rails use 700-800MPa for cost efficiency. High-speed rails balance strength with ductility (elongation >12%) kom tsis txhob tawg tawg, siv quenched-thiab-tempered steel. tensile zog yuav tsum muaj kev sib txawv ntawm kev nyab xeeb yam tsis muaj cov khoom siv ntau dhau lawm siv {}}