summarised latest modern survey

7/23/2019 Summarised Latest Modern Survey

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Successful Implementation ofGIS Techniques for

Route Alignment & Surveys ofPower Transmission Projects

of PO!RGRI"

Power Gri# $orporation Of In#ia%t#


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To optimize cost of transmission line

Line length, number of locations, deviations Minimum river crossings Minimum forest areas Accessibility, right of way considerations To assess route constraints and do construction planning

To ensure statutory clearances

Ground clearance Horizontal/ight of way clearance !learances from power lines, railway lines, road crossings etc"

Why Surveying Is Important?


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UHV Transmission LinesUHV Transmission Lines- 765 kV , Requiring Large ROW- 765 kV , Requiring Large ROW


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Long Distance TransmissionLong Distance Transmission

Lines 500 kV HVDLines 500 kV HVD


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Transmission LinesTransmission Lines

t!ru" #gricu$tura$ %ie$&st!ru" #gricu$tura$ %ie$&s


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Transmission Lines in Hi$$' areasTransmission Lines in Hi$$' areas


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ultiple Transmission %inesThrough Same $orri#or


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Transmission Line Ri(er rossingsTransmission Line Ri(er rossings


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Project $onceptuali'ation ( Project)easi*ility Stage#aster and accurate techni$ues re$uired to evaluate various lineroutes

Pre+$onstruction Stageoute alignment, %etailed Mapping of right of way, groundprofiling, finalisation of tower locations with geo technical details%etailed contouring of undulated terrain for estimation of

benching and revetment $uantities

Project $onstruction Stage!hec& 'urvey only

Transmission %ine Surveying


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Large Quantity variations during execution stageavoided

Constraints assessed in advance

Engineering activities can be taken in advance Construction work can be taken up immediately aftercontract award

Reduction in IDC due to reduction in projectexecution timeoffsetting cost of survey using

modern tecni!ues Reduction of even "#$ kms line lengt would offsetcost of surveying using modern tecni!ues

A#vantages of $on#ucting "etaile#

Survey in A#vance


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Detailed Survey Modern TechniquesDetailed Survey Modern Techniques

Route Alignment using latest satelliteRoute Alignment using latest satellite

imageries (PAN + LSS Mergedimageries (PAN + LSS Merged!roducts" su!erim!osed on Survey o#!roducts" su!erim!osed on Survey o#ndia To!ogra!hical Ma!sndia To!ogra!hical Ma!s

Digital terrain modeling in hilly terrainDigital terrain modeling in hilly terrain

using contouring datausing contouring data Detailed Survey using $PS% Total stationsDetailed Survey using $PS% Total stations

or alternatively ALTMor alternatively ALTM Digiti&ed contouring at undulated ' hillyDigiti&ed contouring at undulated ' hilly

toer locationstoer locations denti)cation o# Route constraints%denti)cation o# Route constraints% denti)cation o# in#rastructure detailsdenti)cation o# in#rastructure details


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Detailed Survey ModernDetailed Survey Modern

TechniquesTechniques

Toer s!otting * o!timi&ation o#Toer s!otting * o!timi&ation o#

locations using commercial so#tarelocations using commercial so#tare

lie PLS ,ADDlie PLS ,ADD

-stimation .# /.0-stimation .# /.0

Pre!aration .# Survey re!ortsPre!aration .# Survey re!orts Soil nvestigationSoil nvestigation


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METHODOLOGY

Acuisition o! "emote

Sensing Data

Digiti#ation o! $ase

%etai&s !rom SOI

sheets

'reparation o! (p%ate%

Digiti#e% Maps

Se&ection o!corri%ors)a&ternatives "oute Se&ection "econnaissanceSurvey

G'S)Tota& Station Survey

Digiti#e% 'ro!i&ing

*omputer+ai%e% to,er

spotting

$O- Estimation. "eportsetc/

Geotechnica&Investigations


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Digiti)e& To*os!eetDigiti)e& To*os!eet

Survey o! In%ia Topo Sheet *orrespon%ing Digiti#e% Map

in%icating re&evant in!ormation


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Digiti)e& +ate$$ite mageDigiti)e& +ate$$ite mage

Sate&&ite Imagery

01/2)34 m reso&ution5

*orrespon%ing Digiti#e% Image

in%icating re&evant in!ormation


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+e$ection o% #$ternati(e Routes+e$ection o% #$ternati(e Routes

ee

Line

./isting Line

#$ternati(e

#$ternati(e

1

#$ternati(e2


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om*uteri)e& Route O*timi)ation 3' +tu&'om*uteri)e& Route O*timi)ation 3' +tu&'

o% #$ternati(e Routeso% #$ternati(e Routes

ee

Line

./isting Line

#$ternati(e

#$ternati(e

1

#$ternati(e2


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Digita$ Terrain 4o&e$Digita$ Terrain 4o&e$

*omputeri#e% Three Dimensiona& Image

$ee Line A&ternative+6A&ternative+7

A&ternative+3


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#&(antages o% 4o&ern#&(antages o% 4o&ern

+ur(e' Tec!niques o(er+ur(e' Tec!niques o(er

Tra&itiona$ sur(e' 4et!o&Tra&itiona$ sur(e' 4et!o&


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Topographic Sheet Indicates only Nala


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Satellite Image Indicates

Large waterbody


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Topographic Sheet Indicates only a part

of Canal


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Satellite Image IndicatesAnother Branch of Canal


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Topographic Sheet

Not many details


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Satellite Image IndicatesRecent Infrastructuree!elopments" LandslideAreas


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T i i Li S th h GIS


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Transmission Line Survey through GIS

Change of Ri!erCourse


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Detai$e& +ur(e' on +e$ecte& RouteDetai$e& +ur(e' on +e$ecte& Route

Detailed Survey is done on the selected route

using Total Stations1 Plotting o# Surveyed Route on the To!ogra!hical

Ma!s

Toer S!otting and !ro)ling is done using PLS2

,ADD So#tare1


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L+ #DD +o%tareL+ #DD +o%tare

Poer Line Systems ,om!uter Aided Design and Dra#ting (PLS,ADD" is a so#tare develo!ed 3y Poer line systems nc1 4SA1

The so#tare is used #or Toer S!otting1

The so#tare automatically !rovide SA$,learances1

The so#tare automatically calculates ind *

5eight S!an1 The so#tare !re!ares the 6Plan * Pro)le 7ie8 o#

the T'L line1

Re!ort $eneration1

The overall organi&ation o# the PLS ,ADD so#tare is shon


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L+ #DD +o%tareL+ #DD +o%tare

,+" o#el of,+" o#el of

%ine in $orri#or%ine in $orri#or

92D Terrain92D Terrain

Survey DataSurvey Data

:eature ,odes:eature ,odes

Design ,riteriaDesign ,riteria

LoadsLoads

,learances,learances

StructuresStructures$eometry$eometry

StrengthStrength

,a3les,a3les

All Pro!ertiesAll Pro!erties

Re!ortsRe!orts

Material ListMaterial List

S!eci)cationS!eci)cation

-tc1-tc1

DraingsDraings

Plan * Pro)lePlan * Pro)le

-;!orted to-;!orted to

,AD system,AD system

ArchivingArchiving

LineLine

ManagementManagement

:uture:uture

Modi)cationsModi)cations

,orridor Terrain,orridor Terrain

$round + .3stacles$round + .3stacles

nstallationnstallation

S!ottingS!otting

AutomaticAutomatic

ManualManual

StringingStringing

SaggingSagging

-tc1-tc1

,alculations,alculations

Sag TensionSag Tension

,learances,learances

Struct2StrengthStruct2Strength

SingsSings

-tc1-tc1

%i*raries%i*raries

InputInput ProcessingProcessing OutputOutput


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$an ro%i$e Draing$an ro%i$e Draing


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8e' #&(antages8e' #&(antages

PLS Cadd software used for preparingPLS Cadd software used for preparingPlan & Profile Drawing and ReportPlan & Profile Drawing and ReportGenerationGeneration

Eliminates manual error in ReportEliminates manual error in Reportgeneration.generation.

Empowers Managers to moe ! modif"Empowers Managers to moe ! modif"stru#tures and see t$e effe#t on t$estru#tures and see t$e effe#t on t$e

Line.Line.Reports ! Cal#ulations of modifiedReports ! Cal#ulations of modified

stru#tures #an %e iewed instantl".stru#tures #an %e iewed instantl".


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#ir3orne Laser Terrain 4a**ing9#LT4:

First reflection

(first pulse)

Last reflection

(last pulse)

T!e $aser $ocator insta$$e& on3oar&

recor&s 3ot! returns %rom t!e

(egetation co(er an& o3;ects ont!e groun& 9t!at is t!e %irst *u$se:

an& %rom t!e terrain un&er t!e

(egetation 9t!at is t!e $ast *u$se:

summarised latest modern survey

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