pirpanjal railway tunnel

8/12/2019 pirpanjal railway tunnel

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WELCOME YOU TO

PIRPANJAL RAILWAY TUNNELSITE

THE LONGEST TRANSPORTATION

TUNNEL IN INDIA


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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


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LOCATION OVERVIEW


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ALIGNMENT PLAN

JAMMU-UDHAMPUR-SRINAGAR-BARAMULLA RAIL

LINK

QAZIGUND

SADURA

ANANTNAG

BIJBEHARAPUNZGAM

AWANTIPORA

KAKPORAPAMPORE

SRINAGAR

BUDGAM

RAJWANSHER

PATTANHAMRE

SOPOREBARAMULLA

BANIHALARPINCHALA

BHATTALOALE

KOHLISANGALDAN

BARALABASANDA--DHAR

REASI

KATRACHAKARWAH

UDHAMPUR

SALAL

RAMNAGARROADMANWAL

SANGARBAJALTAJAMM

U

SURUKOT

PIR PANJAL RAIL TUNNELLength 11100 mts.

South portal photo

SOUTH PORTAL


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SALIENT FEATURES OF T-80(Contd.)

3 m wide road in tunnel for maintenance,emergency rescue & relief.

High mid point & sloping in both directions fordrainage.

Provision of system for ventilation, fire fighting &safety monitoring.

Adit & shaft for parallel working, to be used forventilation, maintenance & emergency reliefduring service.

Extensive instrumentation for monitoring duringtunneling

Consultants : M/s Geoconsult-RITES JV


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MANY FIRSTS The Longest Transport Tunnel In The Country

(11Km)

Highest Over - burden of 1100M

Deepest Drill holes for GeotechnicalInvestigations 640M

First Large Scale Use of New Austrian TunnelingMethod (NATM) in India

First Use of Road header for Tunnel Excavation in Railway Tunneling


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CONSTRUCTION

APPROACH


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APPROACH TO CONSTRUCTIONNO ADIT


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Vertcal Shaft

55m deep,

12m dia

Cross Passage 55 m

Adit 788 m

APPROACH TO CONSTRUCTIONWITH SHAFT AND ADIT


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Tunnel

CrossSection:

STRUCTURAL GAUGE


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TYPICALRAILWAYTUNNEL

SECTIONUSED ONJAMMU-

UDHAMPURRAIL 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

75 @ 2000 C/C

MS PLATE 12mm THICKISHB150-2NOS.

INVERT STRUT ISHB150 @ 500mm

ISHB200 @ 750 C/C

1676

R 2 6 0

0

4 3 7 0

1 3 1 2

150150

Max.150(max)

50M20

1 in 4 0

RAIL LEVEL

FINISH LINE

PAY LINE 150 TH. FROM Min. EXCAVATION25 mm 3 to 5m ROCK BOLTS

AS PER SITE REQUIREMENT

ISHB 150 @ 750 c/c

RESSURE RELIEF HOLES 5m DEEP @m c/c LONGITUDINALLY AS PER SITEEQUIREMENT

150

PAY LINEMIN. EXCAV. LINE

BASE PLATE12mm THICK

R 3 0 0 0

I S H B 1 5 0 @

5 0 0 c / c

S H O T C R E T E 2 5 m m +

W I R E M E S H + 5 0 m m O

R 5 0 m m

S F R S

5 0 T H

. R . C . C . L

A G G I N G

150

P R E S S U R E R E L I E F H O L E S 5 m

D E E P @

3 m c / c

L O N G I T U D I N A L L Y

A R A S P E R S I T E R E Q U I R E M E N T

B A C K F I L L I N G M - 1

0

50

F I N I S H L I N E

3 0 0 T H

. C O N C

. L I N I N

G M - 2

0

150

100

9 0 0

BLOWER

8 @ 150 C/C50 675 150

100

65

6 7 5

2 5 m m

3 m t o 5 m

R O C K B O L T A S

P E R S I T E

R E Q U I R E M E N T

S E C

. A T A - A

75


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LOADING DIAGRAM FOR TUNNELTOP PRESSURE-15000KG/M

AND SIDE PRESSURE-5000KG/M


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BENDING MOMENTS DIAGRAM FORD-SHAPE TUNNEL

TOP PRESSURE-15000KG/M AND SIDE PRESSURE-5000KG/M

MAX BENDING MOMENT = 137KN-M


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BENDING MOMENT DIAGRAM FOR ELLIPITCAL TUNNELTOP PRESSURE 15000KG/M AND SIDE PRESSURE 5000KG/M

MAX. BENDING MOMENT = 35.80KN-M


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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 PRESSURE5000 KG/M

D-SHAPEDTUNNEL

412.5KN 137KN-M 15129 KG 0.083 M

ELLIPTICALTUNNEL

567 KN 35.80KN-M 9025 KG 0.024 M

WITH TOP PRESSURE 15000 KG/M

D-SHAPEDTUNNEL

412.5KN 48.10 KN-M 8565 KG 0.03 M

ELLIPTICALTUNNEL

639 KN 35.65 KN-M 9635 KG 0.028 M


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CONSTRUCTION METHOD

SELECTION DRILL AND BLAST

ROAD HEADER

TUNNEL BORING MACHINE (TBM)


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DRILL AND BLAST CONVENTIONAL, ART

WHICH COMES WITHEXPERIENCE

GOOD IN HARD ROCKYSTRATA

WITH EXPERIENCE, CANDELIVER GOOD PROGRESS

NON CONTINUOUS- CYCLEINVOLVES VARIOUS

ACTIVITIES IN SEQUENCE MAY SPRING SUDDEN

SURPRISES


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ROAD HEADER CONTINUOUS ADVANCE-

LESS SURPRISES MORE CONTROLLED

EXCAVATION- LESSOVERBREAK/CAVITY

FORMATION SUITABLE FOR MEDIUM

HARD ROCK CAN BE WITHDRAWN

MID WAY TO GIVE WAYFOR OTHER METHODS


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TUNNEL BORING MACHINE

CONTINUOUS ADVANCE CIRCULAR SECTION NOT SUITABLE UNDER

SQUEEZINGCONDITIONS

CANNOT BEWITHDRAWN MIDWAYTO GIVE WAY TOOTHER METHODS


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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


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PRE-CONSTRUCTIONPLANNING


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PRE-CONSTRUCTIONPLANNING

Engagement of Consultant QCB System Of tendering

Survey and Investigation

Head start by Taking up ADIT and shaftworks in advance

Tender Planning Key dates Multi Method Approach

Road Header/ D&B


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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 & Instrumentationdata input for Initial Support Design RESS Primary Support System

Resilient enough to Accept the deformations and readjustment ofstresses and Strong enough to take the loads

Deformation Monitoring to assess the stressredistribution, and stabilization before finallining


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INSTRUMENTATIONTo provide early information about tunnel behaviour in order to optimize

excavation & support activities during construction and to recognize the requisiteremedial 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 intunnel on daily basis

Extensometers: To measure stresses in surrounding rock mass

Radial Pressure Cells : To measure pressure of rockmass on shotcretelining

Shotcrete Strain meter: To monitor stresses in shotcrete lining

Piezometer: To monitor hydrostatic pressure during tunneling


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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


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QUALITY ASSURANCE

Laid down responsibilities,procedures and checklists forvarious activities through: CPM, CQM, SH&EM PPM, PSM Organogram

QAP ITP


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QUALITY ASSURANCE (contd)

Availability of relevant documentation and definingthe manner of execution of various activities

Maintaining compliance through appropriatemonitoring

Ensuring adequate support facilities for successful& scheduled execution of work.

Availability of competent/trained personnel to carryout various activities

Compliance of statutory/regulatory requirementsrelated to safety, environment etc.


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Quality Assurance (contd)

Check Lists and Forms for Process Control DuringExecution 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


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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 Inhabitedareas Lined Waterproof Tunnel

No long term impact on water table/ Aquifers


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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


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35Time Line


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PIR PANJAL TUNNEL-EXCAVATION PROGRESS

Year Excavation(mts.)

Remarks

2006 722 Two Faces

2007 1876 Start From 4 Faces2008 2475

2009 2533

2010 1739 Two Faces after Jan10

2011 947 High overburden,Squeezing, Shale

2012 63


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Miles to go

A thing should be madeas simple as possible,

but not simpler.

Einstein


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THANKS !


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ENGAGEMENT OF CONSULTANT Investigations for Tunneling Methodology

Assessment Initial Design

Usage of NATM

Usage of Water proof Membrane for Semi DryTunnel Development of 4-Arc Tunnel X-Section Additional Access through ADIT and Shaft Portal Location Review

Real Time Monitoring / Instrumentationand Design Support


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INVESTIGATIONS & PLANNING2003 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. 2004Geological Surface Mapping along the entire alignment by -For Detailed Geological Section

2004 Data input for Tendering and a Decision Support System forADIT and Shaft decision

Adit & Shaft Work Awarded in June 2004

2004 Detailed Topographical Survey for PortalLocation

2005 Main Tunnel Construction Work Awarded in

August 2005


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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, ifnecessary by an invert if rock is notsuitable


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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)


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503D Monitoring Targets


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EXTENSOMETER


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EXTENSOMETER

FACE MAPPING


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FACE MAPPING

PROBING SHEET


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PROBING SHEET


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DeformationMonitoring in Primary

Lining Before start ofSecondary Lining


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62Charging of Face


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63Ventilation Duct


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64Mucking


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65Wire mesh & Lattice Girder Erection


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Face sealingFace sealing by Shotcrete


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67Drilling for Forepoling


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68Rock Bolting TUNNEL MINING


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TUNNEL MININGActivity Cycle Time (hr.) 2 mt.RC IV

Cycle time (hr.) 1.25mt. RC V

Drilling & Excavation 1.7 0.9

Charging , Blasting& Defuming 2.7 1.5

Mucking 1.1 0.8

Wire Mesh & LatticeGirder 2.4 2.3

Shotcrete 0.9 0.8

Rock Bolting 1.8 1.0

Preparation of newface 0.3 0.3

Maintenance 1.6 1.1

Forepoling 1.6 1.7

Total 14.1 10.4


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Kicker Beam Casting


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72Geotextile Fixing


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73PVC Membrane Fixing


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74 Membrane Stitching


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75Reinforcement for Overt Lining


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76Reinforcement Cage for Inner Lining


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77Concrete Lining Gantry


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View of Finished Lining Concrete


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Profile Checking with Total Station


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80 Core Cutting


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81Testing of Joints (Membrane)


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Sedimentation Tank


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Effluent QualityTest Report


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Documents

pirpanjal railway tunnel