Tunnel T80 across Pir Panjal Mountain Range: The Longest Transportation Tunnel In India
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Tunnel T80 across Pir Panjal Mountain Range: The Longest Transportation Tunnel In India

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The Presentation Covers the General Technical Features of Tunnel T 80 across Pir Panjal Mountain Range, for Kashmir Rail Link. This presentation was made at Civil Engineering Society, IIT Kanpur on ...

The Presentation Covers the General Technical Features of Tunnel T 80 across Pir Panjal Mountain Range, for Kashmir Rail Link. This presentation was made at Civil Engineering Society, IIT Kanpur on 30th September 2013.

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    Excellent Presentation. I can appreciate tunnels better now. Sir can you Upload your IPWE Chennai Presentation? Regards
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Tunnel T80 across Pir Panjal Mountain Range: The Longest Transportation Tunnel In India Tunnel T80 across Pir Panjal Mountain Range: The Longest Transportation Tunnel In India Presentation Transcript

  • WELCOME YOU TO PIRPANJAL RAILWAY TUNNEL SITE THE LONGEST TRANSPORTATION TUNNEL IN INDIA
  • 2 • Location Overview • Salient Features of The Tunnel • Construction Approach • Pre-construction Planning • Usage Of NATM in T-80 • Construction Activities • Quality Assurance • Environment Issues • Social Impact PRESENTATION COVERS
  • LOCATION OVERVIEW
  • 4 ALIGNMENT PLAN JAMMU-UDHAMPUR-SRINAGAR-BARAMULLA RAIL LINK QAZIGUN D SADUR A ANANTNAG BIJBEHARA PUNZGA M AWANTIPORA KAKPORA PAMPOR E SRINAGA R BUDGA M RAJWANSHE R PATTAN HAMRE SOPORE BARAMULLA BANIHA LARPINCHALA BHATTA LOALE KOHLISANGALDAN BARALA BASAND A--DHAR REASI KATRA CHAKARWAH UDHAMPUR SALAL RAMNAGAR ROAD MANWA L SANGAR BAJALT A JAMM U SURUKOT PIR PANJAL RAIL TUNNEL Length 11100 mts. South portal photo SOUTH PORTAL
  • 5
  • 6 SALIENT FEATURES OF T-80 • Total length – 11 Km • Adit – 774 m (58 m2 exc. Area) • Shaft : 55 m depth , 12 m dia • Maximum overburden - 1.10 Km • Tunnelling method :NATM (New Austrian Tunneling Method) • Completed Cost – 1150 Crores • Approx. 440 m below existing Jawahar Road Tunnel(2.75km) • Underground excavation : 10 lac cubic meter • Cross section Area : Excavation : 67 to 78 m2 , Finished Tunnel : 48 m2 • Investigation Bore Holes depth upto 640 m
  • 7 SALIENT FEATURES OF T-80 (Contd.) • 3 m wide road in tunnel for maintenance, emergency rescue & relief. • High mid point & sloping in both directions for drainage. • Provision of system for ventilation, fire fighting & safety monitoring. • Adit & shaft for parallel working, to be used for ventilation, maintenance & emergency relief during service. • Extensive instrumentation for monitoring during tunneling • Consultants : M/s Geoconsult-RITES JV
  • 8 MANY FIRSTS • The Longest Transport Tunnel In The Country (11Km) • Highest ‘Over- burden’ of 1100M • Deepest ‘Drill holes’ for Geotechnical Investigations 640M • First Large Scale Use of ‘New Austrian Tunneling Method (NATM)’ in India • First Use of ‘Road header’ for ‘Tunnel Excavation’ in Railway Tunneling
  • CONSTRUCTION APPROACH
  • 10 APPROACH TO CONSTRUCTION NO ADIT
  • 11 Vertcal Shaft 55m deep, 12m dia Cross Passage 55 m Adit 788 m APPROACH TO CONSTRUCTION WITH SHAFT AND ADIT
  • 12 Tunnel Cross Section: STRUCTURAL GAUGE
  • 13 TUNNELS SECTIONS USED ON KONKAN TRACK
  • 14 TYPICAL RAILWAY TUNNEL SECTION USED ON JAMMU- UDHAMPUR RAIL LINK SHOTCRETE(25mm+WIRE MESH +50mm) OR 50mm SFRS 300 TH. C.C. LINING ISHB 150 @ 500 C/C 50mm TH. R.C.C. LAGGING Min. EXCAVATION LINE 75Ø @ 2000 C/C MS PLATE 12mm THICK ISHB150-2NOS. INVERT STRUT ISHB150 @ 500mm ISHB200 @ 750 C/C 1676 R2600 43701312 150 150 Max. 150(max) 50M20 1 in 40 RAIL LEVEL FINISH LINE PAY LINE 150 TH. FROM Min. EXCAVATION 25 mm Ø 3 to 5m ROCK BOLTS AS PER SITE REQUIREMENT ISHB 150 @ 750 c/c PRESSURE RELIEF HOLES 5m DEEP @ 3m c/c LONGITUDINALLY AS PER SITE REQUIREMENT 150 PAY LINE MIN. EXCAV. LINE BASE PLATE 12mm THICK R3000 ISHB150@500c/c SHOTCRETE25mm+ WIREMESH+50mmOR50mmSFRS 50TH.R.C.C.LAGGING 150 PRESSURERELIEFHOLES5m DEEP@3mc/cLONGITUDINALLY ARASPERSITEREQUIREMENT BACKFILLINGM-10 50 FINISHLINE 300TH.CONC.LININGM-20 150 100 900 BLOWER 8Ø @ 150 C/C 50 675 150 100 65 675 25mmØ3mto5m ROCKBOLTAS PERSITE REQUIREMENT SEC.ATA-A 75
  • 15 LOADING DIAGRAM FOR TUNNEL TOP PRESSURE-15000KG/M AND SIDE PRESSURE-5000KG/M
  • 16 BENDING MOMENTS DIAGRAM FOR D-SHAPE TUNNEL TOP PRESSURE-15000KG/M AND SIDE PRESSURE-5000KG/M MAX BENDING MOMENT = 137KN-M
  • 17 BENDING MOMENT DIAGRAM FOR ELLIPITCAL TUNNEL TOP PRESSURE 15000KG/M AND SIDE PRESSURE 5000KG/M MAX. BENDING MOMENT = 35.80KN-M
  • COMPARISION BETWEEN D-SHAPED AND ELLIPTICAL TUNNEL DESCRIPTION MAX. AXIAL FORCE MAX. BENDING MOMENT MAX. SHEAR FORCE MAX. DISPLACEMENT WITH TOP PRESSURE 15000 KG/M & SIDE PRESSURE 5000 KG/M D-SHAPED TUNNEL 412.5KN 137KN-M 15129 KG 0.083 M ELLIPTICAL TUNNEL 567 KN 35.80KN-M 9025 KG 0.024 M WITH TOP PRESSURE 15000 KG/M D-SHAPED TUNNEL 412.5KN 48.10 KN-M 8565 KG 0.03 M ELLIPTICAL TUNNEL 639 KN 35.65 KN-M 9635 KG 0.028 M
  • 19 CONSTRUCTION METHOD SELECTION • DRILL AND BLAST • ROAD HEADER • TUNNEL BORING MACHINE (TBM)
  • 20 DRILL AND BLAST • CONVENTIONAL, ART WHICH COMES WITH EXPERIENCE • GOOD IN HARD ROCKY STRATA • WITH EXPERIENCE, CAN DELIVER GOOD PROGRESS • NON CONTINUOUS- CYCLE INVOLVES VARIOUS ACTIVITIES IN SEQUENCE • MAY SPRING SUDDEN SURPRISES
  • 21 ROAD HEADER • CONTINUOUS ADVANCE- LESS SURPRISES • MORE CONTROLLED EXCAVATION- LESS OVERBREAK/CAVITY FORMATION • SUITABLE FOR MEDIUM HARD ROCK • CAN BE WITHDRAWN MID WAY TO GIVE WAY FOR OTHER METHODS
  • 22 TUNNEL BORING MACHINE • CONTINUOUS ADVANCE • CIRCULAR SECTION • NOT SUITABLE UNDER SQUEEZING CONDITIONS • CANNOT BE WITHDRAWN MIDWAY TO GIVE WAY TO OTHER METHODS
  • 23 WHY NO TBM • Likelihood of Mixed Geology • Heavily Faulted Areas and/or Wide Fault Zones • High Squeezing Anticipated in middle with High Overburden (1100 mts.) • Heavy Water Flow in Lime Stone Zone with High overburden • TBM may be Trapped by Ground Movement Behind the Face
  • PRE-CONSTRUCTION PLANNING
  • 25 PRE-CONSTRUCTION PLANNING • Engagement of Consultant – QCB System Of tendering • Survey and Investigation • Head start by Taking up ADIT and shaft works in advance • Tender Planning – Key dates – Multi Method Approach • Road Header/ D&B
  • 27 USAGE OF NATM IN T-80 • Suitable for poor and Varying Geology of Himalayan Region • X-Section designed to develop Maximum Self Supporting Capacity • Face Mapping, Probe Hole & Instrumentation data input for Initial Support Design – RESS – Primary Support System • Resilient enough to Accept the deformations and readjustment of stresses and Strong enough to take the loads • Deformation Monitoring to assess the stress redistribution, and stabilization before final lining
  • 28 INSTRUMENTATION To provide early information about tunnel behaviour in order to optimize excavation & support activities during construction and to recognize the requisite remedial measures. Instrumentation data is basic input of the NATM, the observational approach. Instrumentation in Pir Panjal Tunnel: Optical 3 D monitoring: With bi-reflex targets to monitor deformation in tunnel on daily basis Extensometers: To measure stresses in surrounding rock mass Radial Pressure Cells: To measure pressure of rockmass on shotcrete lining Shotcrete Strain meter: To monitor stresses in shotcrete lining Piezometer: To monitor hydrostatic pressure during tunneling
  • 29 CONSTRUCTION ACTIVITES • Open excavation & portal development • Tunnel mining & primary lining • Water-proof membrane installation + drainage system. • Secondary lining. • Ventilation, system and safety installations • Track laying
  • 30 QUALITY ASSURANCE • Laid down responsibilities, procedures and checklists for various activities through: –CPM, CQM, SH&EM –PPM, PSM –Organogram –QAP –ITP
  • 31 QUALITY ASSURANCE (contd…) • Availability of relevant documentation and defining the manner of execution of various activities • Maintaining compliance through appropriate monitoring • Ensuring adequate support facilities for successful & scheduled execution of work. • Availability of competent/trained personnel to carry out various activities • Compliance of statutory/regulatory requirements related to safety, environment etc.
  • 32 Quality Assurance (contd…) Check Lists and Forms for Process Control During Execution of Works: • Required Excavation and Support Sheet (RESS) • ATSS/ Shift Report/Blasting clearance report/ R/Bolt Installation report • Shotcrete testing by Penetrometer test, Core crushing test, thickness verification etc. • Geological mapping (Geological face mapping sheet) • Lining Air Permeability Test • All Material Testing at Site Lab
  • 33 ENVIRONMENT ISSUES • Identified Muck Dumping areas • Recycling of Excavated Rocks – aggregate for concrete constn. • Effluent Settling Tank – Fit for agriculture discharge • Ventilation during Construction Stage – Gas Analyser for air quality monitoring • Controlled Blasting below Inhabited areas • Lined Waterproof Tunnel – No long term impact on water table/ Aquifers
  • 34 SOCIAL IMPACT • All weather link, Alternate to Jawahar Tunnel • Even at Construction stage, given a boost to – local construction-industry – Employment – Transportation business • A boost to Local economy of Banihal
  • 35 Time Line
  • 36 PIR PANJAL TUNNEL- EXCAVATION PROGRESS Year Excavation (mts.) Remarks 2006 722 Two Faces 2007 1876 Start From 4 Faces 2008 2475 2009 2533 2010 1739 Two Faces after Jan’10 2011 947 High overburden, Squeezing, Shale 2012 63
  • 40 Miles to go…… “A thing should be made as simple as possible, but not simpler”. Einstein
  • 41 THANKS !
  • 42 ENGAGEMENT OF CONSULTANT • Investigations for Tunneling Methodology Assessment • Initial Design – Usage of NATM – Usage of Water proof Membrane for Semi Dry Tunnel – Development of 4-Arc Tunnel X-Section – Additional Access through ADIT and Shaft – Portal Location Review • Real Time Monitoring / Instrumentation and Design Support
  • 43 INVESTIGATIONS & PLANNING 2003 Geological L-Section Profile Submitted by M/s RITES based on GSI data.- Used to decide the Bore hole Location. 2003-04 Bore holes by RITES/ MECL- To Confirm Geological Mapping inference 2004 Consultants engaged in Feb. 2004 Geological Surface Mapping along the entire alignment by - For Detailed Geological Section 2004 Data input for Tendering and a Decision Support System for ADIT and Shaft decision – Adit & Shaft Work Awarded in June 2004 2004 Detailed Topographical Survey for Portal Location 2005 Main Tunnel Construction Work Awarded in August 2005
  • 44
  • 45
  • 46
  • BASIC PRINCIPLES OF NATM • Rock Mass is the major load bearing member • Primary Support shall  maintain the integrity & strength of Rock Mass  light, have good and area contact (shotcrete)  strengthen Rock Mass (bolt, grouting)  provide protection to workers (steel rib, mesh)  installed quickly • Provide always an effective ring closure, if necessary by an invert if rock is not suitable
  • BASIC PRINCIPLES OF NATM (Contd.) • Rounded shape of Cross-Section • Continuous control of system behaviour by monitoring • Inner lining shall be installed only after balance of stresses („zero“ deformation)
  • 49
  • 503D Monitoring Targets
  • 51
  • 52
  • 53 EXTENSOMETER
  • 54 FACE MAPPING
  • 55 PROBING SHEET
  • 56
  • 57
  • 58
  • 59 Deformation Monitoring in Primary Lining Before start of Secondary Lining
  • 60
  • 61
  • 62Charging of Face
  • 63Ventilation Duct
  • 64Mucking
  • 65Wire mesh & Lattice Girder Erection
  • 66 Face sealing Face sealing by Shotcrete
  • 67Drilling for Forepoling
  • 68 Rock Bolting
  • 69 TUNNEL MINING Activity Cycle Time (hr.) 2 mt. RC IV Cycle time (hr.) 1.25 mt. RC V Drilling & Excavation 1.7 0.9 Charging , Blasting & Defuming 2.7 1.5 Mucking 1.1 0.8 Wire Mesh & Lattice Girder 2.4 2.3 Shotcrete 0.9 0.8 Rock Bolting 1.8 1.0 Preparation of new face 0.3 0.3 Maintenance 1.6 1.1 Forepoling 1.6 1.7 Total 14.1 10.4
  • 70
  • 71 Kicker Beam Casting
  • 72 Geotextile Fixing
  • 73 PVC Membrane Fixing
  • 74Membrane Stitching
  • 75 Reinforcement for Overt Lining
  • 76 Reinforcement Cage for Inner Lining
  • 77Concrete Lining Gantry
  • 78 View of Finished Lining Concrete
  • 79 Profile Checking with Total Station
  • 80Core Cutting
  • 81Testing of Joints (Membrane)
  • 82 Sedimentation Tank
  • 83 Effluent Quality Test Report
  • 84