{"id":1393,"date":"2023-05-03T00:00:00","date_gmt":"2023-05-03T00:00:00","guid":{"rendered":"https:\/\/www.nextias.com\/current_affairs\/uncategorized\/03-05-2023\/j-slab-track-system\/"},"modified":"2023-05-03T00:00:00","modified_gmt":"2023-05-03T00:00:00","slug":"j-slab-track-system","status":"publish","type":"post","link":"https:\/\/www.nextias.com\/ca\/current-affairs\/03-05-2023\/j-slab-track-system","title":{"rendered":"J Slab Track System"},"content":{"rendered":"<p><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong><u>In News<\/u><\/strong><\/span><\/span><\/span><\/p>\n<ul>\n<li style=\"list-style-type:disc\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong>Japan <\/strong><\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">to train <\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong>1,000 Indian engineers<\/strong><\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"> before transfer of bullet train technology.<\/span><\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong><u>About<\/u><\/strong><\/span><\/span><\/span><\/p>\n<ul>\n<li style=\"list-style-type:disc\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">Indian engineers will be trained by Japanese experts before starting work on the<\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong> High-Speed Rail Track system<\/strong><\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"> for <\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong>Mumbai Ahmedabad High Speed Rail corridor (MAHSR).<\/strong><\/span><\/span><\/span><\/li>\n<li style=\"list-style-type:disc\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">The bullet train being built between Mumbai and Ahmedabad will use the <\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong>ballastless Slab Track system (popularly known as J Slab track system)<\/strong><\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"> as used in Japanese Shinkansen high speed railways.<\/span><\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong><u>What is the J Slab Track System?<\/u><\/strong><\/span><\/span><\/span><\/p>\n<ul>\n<li style=\"list-style-type:disc\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">A ballastless track or slab track is a type of railway track infrastructure in which the traditional elastic combination of ties\/sleepers and ballast is replaced by a<\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong> rigid construction of concrete.\u00a0\u00a0<\/strong><\/span><\/span><\/span><\/li>\n<li style=\"list-style-type:disc\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">Slab Track was invented and has evolved in Japan and now the term is synonymous with High Speed Track.\u00a0<\/span><\/span><\/span><\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/cfstatic.nextias.com\/cdn-cgi\/image\/format=auto\/file_library\/mix_content\/566329340882256100_PDF_ORIGINAL.png\" \/><\/p>\n<p><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong><u>How did it came into use?\u00a0<\/u><\/strong><\/span><\/span><\/span><\/p>\n<ul>\n<li style=\"list-style-type:disc\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">The first HSR in Japan i.e. <\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong>The Tokaido Shinkansen began operational in 1964 <\/strong><\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">between Tokyo and Shin-Osaka. Conventional ballasted track structure was adopted in Tokaido Shinkansen.\u00a0<\/span><\/span><\/span><\/li>\n<li style=\"list-style-type:disc\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">Track geometry of conventional ballasted tracks used to disturb frequently with the increase in traffic density. Due to the problem of disturbance of track geometry coupled with reduction in time available for maintenance and labour shortage, the need was felt to introduce a low maintenance track.\u00a0<\/span><\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong><u>Significance<\/u><\/strong><\/span><\/span><\/span><\/p>\n<ul>\n<li style=\"list-style-type:disc\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">Performance of Slab Track is better for High Speed Railway compared to ballasted track due to its <\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong>higher flexural stiffnes<\/strong><\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">s and it is because of this that the forces in Slab Track are distributed over a larger area and deflections are considerably less compared to ballasted track. This ultimately results in<\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong> lesser maintenance requirements<\/strong><\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"> in Slab Track structure.<\/span><\/span><\/span><\/li>\n<li style=\"list-style-type:disc\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">Although initial construction cost of Slab Track is higher compared to ballasted track, the difference is compensated within a few years of operation because of less maintenance and labour requirements in Slab Track.\u00a0<\/span><\/span><\/span><\/li>\n<li style=\"list-style-type:disc\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\">Slab Track structure is particularly advantageous in case of <\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong>viaduct and tunnel due to its lighter and sleek structure.<\/strong><\/span><\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#000000\"><strong>Source: <\/strong><\/span><\/span><\/span><a href=\"https:\/\/www.thehindu.com\/news\/national\/japan-to-train-1000-indian-engineers-before-transfer-of-bullet-train-tech\/article66800284.ece\" style=\"text-decoration:none\" target=\"_blank\" rel=\"noopener\"><span style=\"font-size:12pt\"><span style=\"font-family:Arial\"><span style=\"color:#1155cc\"><u>TH<\/u><\/span><\/span><\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In News Japan to train 1,000 Indian engineers before transfer of bullet train technology. About Indian engineers will be trained by Japanese experts before starting work on the High-Speed Rail Track system for Mumbai Ahmedabad High Speed Rail corridor (MAHSR). The bullet train being built between Mumbai and Ahmedabad will use the ballastless Slab Track [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1394,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21],"tags":[26,33],"class_list":["post-1393","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-current-affairs","tag-gs-3","tag-science-technology"],"acf":[],"jetpack_featured_media_url":"https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2023\/07\/704824Screenshot_6.png","_links":{"self":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/1393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/comments?post=1393"}],"version-history":[{"count":0,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/1393\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/media\/1394"}],"wp:attachment":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/media?parent=1393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/categories?post=1393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/tags?post=1393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}