{"id":79539,"date":"2025-12-25T12:28:09","date_gmt":"2025-12-25T06:58:09","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=79539"},"modified":"2025-12-25T18:32:14","modified_gmt":"2025-12-25T13:02:14","slug":"tunnel-safety-guidelines-lessons-from-the-silkyara-collapse","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/tunnel-safety-guidelines-lessons-from-the-silkyara-collapse\/","title":{"rendered":"Tunnel Safety Guidelines &#8211; Lessons from the Silkyara Collapse"},"content":{"rendered":"<h2 style=\"text-align: justify;\"><b>Tunnel Safety Guidelines Latest News<\/b><\/h2>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">On November 12, 2023, the Silkyara Bend\u2013Barkot Tunnel on NH-134 (Char Dham Mahamarg Pariyojana) <\/span><b>collapsed<\/b><span style=\"font-weight: 400;\">, trapping 41 workers for 17 days.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Though all were rescued safely, the incident exposed <\/span><b>systemic weaknesses<\/b><span style=\"font-weight: 400;\"> in tunnel planning, geological assessment, and emergency preparedness, especially in fragile Himalayan terrain.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In response, the Ministry of Road Transport and Highways (<\/span><b>MoRTH<\/b><span style=\"font-weight: 400;\">) issued comprehensive guidelines to prevent and mitigate road tunnel collapses, particularly relevant for strategic and border area connectivity projects.<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><b>Why Tunnel Safety Matters<\/b><\/h2>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tunnels enable <\/span><b>seamless connectivity<\/b><span style=\"font-weight: 400;\"> in mountainous, snow-bound, eco-sensitive, congested and border areas.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">India\u2019s expanding highway network under strategic and Char Dham projects has increased tunnelling activity, raising geological and safety risks.<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><b>Key Provisions of the New Guidelines<\/b><\/h2>\n<ul>\n<li><b>Strengthening planning (DPR, GBR and risk register):<\/b>\n<ul>\n<li><b>Issues identified<\/b><span style=\"font-weight: 400;\">: Many Detailed Project Reports (DPRs) reduced to procedural formalities. Inadequate geological and geotechnical investigations.<\/span><\/li>\n<\/ul>\n<\/li>\n<li><b>Guidelines:\u00a0<\/b>\n<ul>\n<li><span style=\"font-weight: 400;\">Project authority responsible for verifying correctness of geological investigations.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Mandatory preparation of Geotechnical Baseline Report (GBR), risk register (hazards, risks, mitigation measures).<\/span><\/li>\n<li><b>Principle of risk allocation<\/b><span style=\"font-weight: 400;\">: \u201cRisk shall be borne by the party best equipped to manage it.\u201d<\/span><\/li>\n<li><span style=\"font-weight: 400;\">GBR and risk register to be shared with bidders to ensure transparency and realistic costing.<\/span><\/li>\n<\/ul>\n<\/li>\n<li><b>Geological realities and design challenges:<\/b>\n<ul>\n<li><b>Issues:<\/b>\n<ul>\n<li><span style=\"font-weight: 400;\">Tunnel design is critical as ground itself acts as a support system.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Predicting ground properties from limited tests is an oversimplification, especially in the Himalayas.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Poor investigations lead to time overruns, cost escalation, and safety failures.<\/span><\/li>\n<\/ul>\n<\/li>\n<li><b>Special conditions to be assessed: <\/b><span style=\"font-weight: 400;\">Squeezing and swelling ground, rock bursts, shallow cover zones, tunnels below perennial streams\/nalas, hot water ingress, and toxic\/flammable gases (long tunnels).<\/span><\/li>\n<\/ul>\n<\/li>\n<li aria-level=\"1\"><b>Tunnelling technologies (NATM vs TBM):<\/b>\n<ul>\n<li><b>NATM <\/b><span style=\"font-weight: 400;\">(New Austrian Tunnelling Method): \u201cDesign-as-you-go\u201d approach, suitable for non-uniform rock conditions, controlled blasting, and mandatory excavation and support sheet for each round.<\/span><\/li>\n<li><b>TBM <\/b><span style=\"font-weight: 400;\">(Tunnel Boring Machine): Used in uniform geological stretches, requires vigilance against roof collapse and water ingress.<\/span><\/li>\n<\/ul>\n<\/li>\n<li><b>Collapse risk zoning and safety infrastructure:<\/b><span style=\"font-weight: 400;\"> Tunnels to be classified into collapse-risk zones. High-risk zones must include Np-4 escape pipe (minimum 0.9 m diameter), mobile rescue containers, fixed rescue containers, minimum 24-hour survival capacity.<\/span><\/li>\n<li><b>Emergency response and human capacity:<\/b>\n<ul>\n<li><span style=\"font-weight: 400;\">Shift managers must be trained as first responders.<\/span><\/li>\n<li><b>Emergency Response Plan (ERP)<\/b><span style=\"font-weight: 400;\">: Prepared in advance, updated weekly based on site conditions.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><b>India\u2019s Tunnel Infrastructure Snapshot<\/b><\/h2>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">According to MoRTH\u2019s reply in Parliament (December 12, 2024), a total of <\/span><b>42 tunnels <\/b><span style=\"font-weight: 400;\">covering 60.37 km in length in 27 projects of National Highways have been <\/span><b>completed <\/b><span style=\"font-weight: 400;\">to date.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Apart from this, <\/span><b>57 <\/b><span style=\"font-weight: 400;\">tunnels covering 93.96 km in length are currently <\/span><b>under implementation<\/b><span style=\"font-weight: 400;\"> in 37 projects on NHs in the country.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">3 tunnels covering 9.68 km in length have been approved for construction in 3 projects at an estimated cost of Rs 1,962 crore.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">One 6-lane project in Maharashtra costing Rs 4501 crore, including the construction of 2 tunnels having a total length of 3.47 km, has been apprised by Public Private Partnership Appraisal Committee (<\/span><b>PPPAC<\/b><span style=\"font-weight: 400;\">).<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><b>Challenges and Way Forward<\/b><\/h2>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Weak DPR quality<\/b><span style=\"font-weight: 400;\">: Institutionalise scientific, data-driven DPRs.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Complex Himalayan geology:<\/b><span style=\"font-weight: 400;\"> Integrate real-time geological monitoring.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Inadequate on-site emergency preparedness<\/b><span style=\"font-weight: 400;\">: Strengthen capacity-building of site managers. Periodic independent safety audits.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Coordination gaps during rescue operations:<\/b><span style=\"font-weight: 400;\"> Clear role definition for &#8211;<\/span>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Incident commander (District Magistrate)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Construction agencies<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Local administration<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">NDRF\/SDRF commanders<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">The Armed Forces must ensure coordination, technical support, and responder safety.<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Use guidelines as a template<\/b><span style=\"font-weight: 400;\">: For other infrastructure sectors (metros, hydropower).<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><b>Conclusion<\/b><\/h2>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The Silkyara tunnel collapse was a <\/span><b>watershed moment<\/b><span style=\"font-weight: 400;\"> in India\u2019s infrastructure journey.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">MoRTH\u2019s <\/span><b>new guidelines <\/b><span style=\"font-weight: 400;\">mark a shift from procedural compliance to risk-based engineering, emphasising geological realism, accountability, and human safety.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Effective implementation<\/b><span style=\"font-weight: 400;\"> will be crucial to ensuring that India\u2019s push for strategic connectivity and infrastructure-led growth does not come at the cost of lives and sustainability.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><b>Source: <\/b><a href=\"https:\/\/indianexpress.com\/article\/explained\/road-ministry-guidelines-tunnel-10436668\/#:~:text=The%20Ministry&#039;s%20guidelines%20say%20that,be%20maintained%20for%20each%20round.\" target=\"_blank\" rel=\"nofollow noopener\"><b>IE<\/b><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In response to the Silkyara tunnel collapse, the MoRTH issued comprehensive guidelines to prevent and mitigate road tunnel collapses.<\/p>\n","protected":false},"author":19,"featured_media":79644,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18],"tags":[60,4400,4402,22,59],"class_list":{"0":"post-79539","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-mains-current-affairs","8":"tag-mains-articles","9":"tag-port-security","10":"tag-tunnel-safety-guidelines","11":"tag-upsc-current-affairs","12":"tag-upsc-mains-current-affairs","13":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/79539","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=79539"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/79539\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/79644"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=79539"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=79539"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=79539"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}