Inception Report V3 Bridge Engineering

5/21/2018 Inception Report V3 Bridge Engineering

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Stocks & Partners

Consulting Engineers and Project Managers

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HHRP Yank Creek Kainantu Segment

Inceptio

n Report

Part (2): BridgeEngineering

Stocks & Partners

0

Highlands Highway RehabilitationProject (HHRP)

Preliminary Design (Yung Cree

!ainantu "egment)

Date o# "ubmission$ %th&une' *+


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Technical Report Documentation Page

1. Report No. 01 2. Government Accession No. 3. Recipients Catalog No.

4. Title and Sutitle

!reliminar" #esign $ %ig&lands %ig&'a" Re&ailitation!ro(ect )%%R!*

)+ung Cree, - ainantu Segment*

/. Report #ate

. !erorming rganisation Code

. !erorming rganisation Report No.

. Aut&ors

SG Consortium5. !erorming rganisation Name and Address

!. 6o7

6R8 NC#!apua Ne' Guinea

10. 9or, :nit No. )TRA;S*

11. Contract or Grant No.

12. Sponsoring Agenc" Name and Address

National #epartment o 9or,s )N#o9*under

%ig&lands %ig&'a" Re&ailitation !ro(ect )%%R!*

13. T"pe o Report and !eriod Covered

;nception Report

14. Sponsoring Agenc" Code

1/. Supplementar" Notes

1. Astract

T&e %%9 is !NGs economic lieline and its position 'ill continue to remain or some time"et8 'ell into t&e uture. 9&en it 'as constructed initiall"8 appropriate easiilit" stud"involving options scoping or route and ridge selection 'as never carried out prior toengineering design and construction. uent landslips. ?aintenance o t&e e7isting road and its associated acilitiest&roug& recurrent udgets &ad proven to e ver" diicult and e7pensive e7ercise. n t&eot&er &and8 'it& increasing resource development pro(ects activities in t&e &ig&lands part ot&e !NG8 t&e traic lo' is increasing and is pro(ected to increase signiicantl" 'it&in t&emedium and long term.

T&ese 'arrant t&e upgrade o t&e e7isting 2$lane %%9 to 4$lane under t&e %ig&lands%ig&'a" Re&ailitation !rogram )%%R!*. Apart rom containing t&e increased traic lo'8re$design options o prolematic sections o t&e %%9 to more stale ormation 'ill e

anot&er ma(or eneit. T&e national government must e commended or realising t&e

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economic signiicance o %%9 and ma,ing t&e commitment under t&e %%R! to upgradet&e entire rout lengt& starting rom @ae8 ?oroe !rovince t&roug& to t&e &ig&landsprovinces.

T&is inception report onl" covers t&e segment o stud" et'een +ung Cree, - ainantu.

1. e" 9ords 1. #istriution Statement

15. Securit" Class i. )o t&is report*

:nclassiied

20. Securit" Classi. )o t&is page*

:nclassiied

21. No o !ages 22. !rice

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Table of Contents

Technical Report Documentation Page..................................................................................1

7ecutive Summar".................................................................................................................2@ist o ues..............................................................14.2.3.1 ;nluence @ine.................................................................................................14.2.3.2 @oading Conigurations....................................................................................15.2.3.3


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Appendi7 )A* 7isting 6ridge ;normation $ 1stReconnaissance #ata )+ung Cree, -ainantu* 24Appendi7 )6* ?ap s&o'ing Road Alignment B 6ridge @ocations )+ung Cree, - ainantu*..24Appendi7 )C* !&otograp&s o 7isting 6ridge Conditions.................................................24

R)RNC".....................................................................................................................24

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@ist o


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7ecutive Summar"

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1.0 INTRODUCTION

1.1 Pro*ect Description

T&e intent o t&is report is to summarise t&e preliminar" route and ridge alignment surve" includingassociated road eatures suc& as guard rails8 eart& retention 'all8 etc.8 on e7isting and notealternate route and ridge alignment options or detail investigation.

A stud" 'as underta,en et'een 13t&- 14 t&o ?a"8 2014 " SG Consortium to set t&e p&ase ordetail investigation and its indings is presented in t&is inception report. T&is report is limited topresent segment o %ig&lands %ig&'a" )%%9* tas,ed to SG Consortium et'een +ung Cree,and ainantu8 partiall" ?oroe and astern %ig&lands !rovince.

T&e %%9 is !NGs economic lieline and its position 'ill continue to remain or some time "et8 'ell

into t&e uture. 9&en it 'as constructed initiall"8 appropriate easiilit" stud" involving optionsscoping or route and ridge selection 'as never carried out prior to engineering design andconstruction. uent landslips. ?aintenance o t&e e7isting road and its associated acilities t&roug& recurrentudgets &ad proven to e ver" diicult and e7pensive e7ercise. n t&e ot&er &and8 'it& increasingresource development pro(ects activities in t&e &ig&lands part o t&e !NG8 t&e traic lo' isincreasing and is pro(ected to increase signiicantl" 'it&in t&e medium and long term.

T&ese 'arrant t&e upgrade o t&e e7isting 2$lane %%9 to 4$lane under t&e %ig&lands %ig&'a"Re&ailitation !rogram )%%R!*. Apart rom containing t&e increased traic lo'8 re$design optionso prolematic sections o t&e %%9 to more stale ormation 'ill e anot&er ma(or eneit. T&enational government must e commended or realising t&e economic signiicance o %%9 andma,ing t&e commitment under t&e %%R! to upgrade t&e entire rout lengt& starting rom @ae8?oroe !rovince t&roug& to t&e &ig&lands provinces.

1.+ O,erall Pro*ect "cope

T&e scope o t&e preliminar" design rom +ung Cree, - ainantu upgrade re>uirements include t&eollo'ing tas,s1. Rerouting option scoping stud" or prolematic sections )especiall" asampass*2. Collect and revie' pertinent inormation related to t&e 4$lane upgrade o %%9 roads and

ridges and conduct ield revie's o t&e e7isting ridge and drainage'a" conditions.3. #etail geotec&nical investigation report4. Revie' e7isting utilities o t&e segment under stud"/. Revie' e7isting &"drologic anal"sis o eac& ridge sites and critical drainage sections. Revie' e7isting &"draulic inormation or eac& ridge sites. Assess impact o replacement structure )s* upon t&e 100$"ear 'ater surace proile or t&e

segment )s* o %%9 )+ung Cree, $ ainantu* ad(acent to and upstream o eac& ridge

. Assess impact on traic8 constructailit"8 maintenance8 sc&edule and cost o upgradingridge and D or culvert t"pe at eac& site ot& e7isting and ne' sites

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5. !rovide recommendations or optimising t&e &"draulic capacit" or t&e upgrade or replacedstructures.

10. !erorm engineering appraisal o t&e upgrade o e7isting 2$lane to 4$lane &ig&'a" andunderta,en preliminar" design or detail design and construction8 and

11. !repare 'ritten reports summarising inding and recommendations

1.- "ummar of Information Re,ie/e

T&e ollo'ing documents 'ere collected and revie' during t&e inception report and scoping stud"p&ase.

1. Topograp&ic ?ap - ainantu S&eet 0/ and aiapit S&eet 1/2. Geological ?ap - ?ar,&am S6 // $ 103. Geotec&nical Reports - Not availale4. S?C Road and 6ridge ;nventor" Assessment Report - Not availale at t&e time o report

/. Asset ?anagement Report rom #9 %E - Not availale at t&e time o report. %"drological and %"draulics Report - Not availale at t&e time o report

Topograp&ic mapping is prepared or t&e pro(ect at a scale o FFFmm to F.. mm &oriontal anda contour interval o FFFF.. m t&is mapping 'as used to la" out t&e location o e7isting ridgeand drainage'a" toget&er 'it& &ig&lig&ts o proposed roads8 ridges and drainaga'a"improvements associated 'it& t&e road and ridge upgrade and suse>uentl"8 or t&edetermination o c&annel cross$sections or t&e &"draulic anal"sis.

n t&e ot&er &and8 geological map 'as used to ascertain t&e geotec& team o t&e li,el" ormation8aults and minerals anticipated or t&e segment under t&is stud". T&is inormation is also used toset out t&e detail ield investigation plan.

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7.0 !I"TIN# $RID# %&I#N'NT %ND C%P%CIT( %""""'NT

7.1 Preambles

7.1.1 Ob*ecti,es

T&e o(ective o t&e ;nvestigation 'ill e

To revie' t&e e7isting inormation8 inspect and report on t&e present condition8 e7plore t&e

options availale including upgrading e7isting ridge8 conduct &"drological studies andriver training investigation and assess environmental impacts to enale selection o t&eest option to meet t&e 4$lane upgrade re>uirements.

!erorm preliminar" design and documentation including dra'ings8 speciications8 cost

estimates 'it&in approved standards and proposal o detail investigation or t&e detail

design and construction p&ase

7.1.+ "cope of "er,ices

i* Revie' all inormation and documentation availale at #o9 %ead>uarters and in t&e!rovincial #o9 ices )!#o9*8 and in t&e !rovincial Government 9or,s ices)!G9* on e7isting ridges to e reconstructedDreplaces8 or on t&e location or ne'ridges

ii* Consult t&e sta o t&e !#o9 and #o9 and an" ot&er relevant aut&orit" on river lo'data8 rainall8 geological data and ot&er relevant mattersH

iii* Consult 'it& local police8 truc,ing companies and !?I$perators on traic and ot&errelated mattersH

iv* 7amine t&e structural condition o t&e e7isting ridgesv* Recommend an" urt&er investigations on t&e &"drolog" or geolog" o t&e area '&ic&

are re>uired or t&e inal design and sumit proposals or carr"ing out additionalinvestigations 'it& t&eir costH and

vi* !rovide ull investigation and preliminar" design 'it& recommendation o optimumstructure at eac& ridge sites 'it&in t&e segment o stud". !articular re>uirements oeac& site 'ill e mapped and included in t&e preliminar" design report to eincorporated in t&e detail design and construction p&ase.

7.+ Detail "ite In,estigation

7.1.1 #eneral

Scope o initial visit 'as to ascertain t&e SG Consortium o e7isting road and ridge alignmentconditions and to ormulate scope8 met&ods and 'or, plan o stud" or t&e detail investigationp&ase. ?a(orit" o t&e e7isting ridges et'een +ung Cree, - ainantu are o Steel GirderConcrete #ec, )SGC#* predominantl" o single lane )SD@* - Single Span )SDS*. ;n lig&t o t&eincreasing traic lo'8 t&e current capacit" is not ade>uate ot& in terms o volume and carr"ingcapacit" or t&e 4$lane upgrade re>uirements.

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T&e scope o service under t&e detail investigation 'ill includeHi* #es,top stud" o e7isting geotec&nical and geological condition inormation or t&e siteii* Revie' o aerial p&otograp&" and mapping o t&e site as an aid to site selection and to

identi" an" constraints on t&e design )e.g. c&annel movements8 landslips8 etc*.

iii* Revie' o availale inormation on e7isting crossing structures )ridge* at t&e site8 andinspection and reporting on t&e condition o t&e structures. T&e investigation 'ill reporta recommended load rating or an" e7isting structure

iv* ptions considered or ridging o t&e site 'ill include retaining and upgrading t&ee7isting ridge )'&ere one e7ist*

v* %"drolog" and &"draulics stud"

7.1.+ %lignment Report

To supplement t&e inormation t&at 'ill e provided " #o9 and t&e !rovincial Administrations8

SG Consortium 'ill underta,e site inspections as necessar" to canvas and assess localcommunit" needs and complete site evaluation8 alignment selection and preliminar" design. As aminimum8 'e 'ill allo' or relevant design sta to inspect t&e site at least t'ice during t&e;nvestigation. T&is 'ill lead to inspection o t&e site and assessment o e7isting ridge prior tosumission o t&e ;nvestigation Report );R*.

T&e initial stud" 'as underta,en using ve&icle mileage and &and &elp G!S )G10* 'it& preloaded!NG ase map. All locations o e7isting ridge8 culverts8 specialist eart& retaining structure andot&er important road eatures 'ere captured.

Critical road and ridge conditions 'ere also noted 'it& terrain eatures rom +ung Cree, t&roug&to ainantu To'ns&ip. T&e initial ridge inormation otained 'as cross$c&ec,ed 'it& S?Cprevious report )F..reF.*8 and t&e details o '&ic& is presented in %ppeni 233.4. T&e G!Scoordinate site otained during initial ield investigation 'as used to plot t&e ridge and roadalignment including ot&er important eatures using google eart& sot'are and an astract isattac&ed in %ppeni 2%4.

#uring t&e detail investigation p&ase8 t&e e7isting alignment 'ill e surve"ed in more detaildetermining s,e' angle8 realignment options to improve road alignment and potential e7pansion to4$lane ridge.

7.1.- "ite "ur,e

A reputale surve"ing irm 'ill e engaged to perorm #igital Terrain ?odelling )#T?* Surve" on alle7isting and proposed ridge alignment. T&e o(ect o t&is e7ercise is to produce topograp&icmaps 'it& closer$spaced contour intervals at various appropriate scales. T&e maps 'ill e used or=structure contouring during detail geotec&nical investigation to produce inerred geotec&nicalmodels and suse>uent engineering ridge and approac& road design. T&e maps 'ill also serveas ase plans or ield data plots during &"drological investigation and &"draulics design.

7.1.5 6rolog an 6raulics

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%"drolog" studies and lood &eig&ts determination or ridging options o all t&e ridge sites8 ot&e7isting and ne' 'ill e determined using t&e procedure set out in JS?C ualiications and e7tensive e7perience in ridging ostreams 'it& similar c&aracteristics to t&at at t&e pro(ect crossing.

T&e topograp&ic map to assist t&is computation is otained rom ?ineral Resource Aut&orit")?RA*. !resented in Tale 1.0 elo' are t&e initial estimates o pea, disc&arge or eac& ridge siteunder stud" and 'ill e veriied during detail investigation eore preliminar" design sensitivit"anal"sis.

Table 1.0 "ummar of Pea Discharges

&ocation 108ear 2m-9s4 1008ear 2m-9s4

Coorinates Name

"outhings 2"4 asting 24:.15 14.0445 +ung Cree,.21/ 14.0243 :nduno

.22/4/ 14.01/5/ !itiruna.2/002 14/.50 Ramu River )+on,i

#am*.225 14/.524/ Camp )Aroma* Cree,

!unano )#aramei*.21/3 14/.514

Co'in

.2013 14/.51432 2.4m dia. Single urrelculvert crossing )Steelcorrugated*

.2/31 14/.23 ;amupim.2504 14/.31 ainantu )6arepa*

9it&in t&e segment o stud"8 all e7isting ridge and culverts sites properties 'ill e investigatedsuc& as8 la"out coniguration8 roug&ness8 velocit" and lo' regime e7panding rom previous reports)i an"*. T&e &"draulic anal"sis 'ill include t&e revie' o e7isting &"drolog" or eac& ridge site8

revie' o e7isting planning studies8 and t&e &"draulic anal"sis o e7isting and proposed structures.

T&e &"draulic anal"sis or ridges sites and 2 culverts 'ill e conducted in t'o steps.


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t&e e7isting condition case. T&e &"draulic line otained using %+#RA;N 'ill t&en e inputted intot&e %C$2 model or t&e e7isting drainage'a" condition. Cross sectional data or t&e %C$2program 'ill e otained rom t&e topograp&ic mapping prepared or t&is pro(ect.

7.1.; n,ironmental Impact %ssessment

Site inormation 'ill e gat&ered to estalis& aseline environmental conditions and assess impacto ridging options on t&e environment. A preliminar" nvironmental ;mpact Assessment );A* ort&e prepared ridge option 'ill e prepared. T&is 'ill involve underta,ing aseline studies ordra'ing up nvironmental ?anagement and ?onitoring !lan to monitor ma(or environmentalc&anges andDor damage as result o t&e ridge construction and associated 'or,s.

:nderta,e environmental aseline studies noting t&e natural stage o t&e p&"sical and iologicalenvironment )lora and auna*8 its 'ater'a"s and river s"stems 'it&in t&e possile aected areasand ot&er areas in t&e near" vicinit". T&is data 'ill e ver" important or uture comparisons o t&e

environment prior to construction8 during construction and post construction periods orascertaining natural and induced causes o damage to t&e natural environment and instailit" o t&earea.

7.1.; #eotechnical In,estigation

#uring detail investigation under t&e current preliminar" design e7ercise8 no e7tensive ridge site)e7isting* geotec&nical condition investigation suc& as ore&ole drilling 'ill e conducted. T&ise7ercise 'ill e underta,en in t&e detail design and construction p&ase. T&us8 t&e scope undert&ese terms o reerence 'ill e limited to

Carr"ing out surace assessment8

#evelop engineering assumptions ased on visual inspection o e7isting site geotec&nical

conditionsH

#evelop design criteria to e incorporated in t&e detail design p&ase

#uring t&e detail design p&ase8 e7tensive geotec&nical investigation s&all e conducted to deinet&e susurace soil8 ground'ater and edroc, conditions " emplo"ing core drill ore&oles alongt&e entire ridge alignment at appropriate interval not more t&an 10m 'it& at least 20m osets romeac& autments to develop geotec&nical engineering conclusions and recommendations regardingeart&'or, construction8 reuse o e7isting soil as ac,ill material8 de'atering8 oundation support8

road'a" and approac& reconstruction. T&is scope o t&e e7ercise s&all e to produce inerredgeotec&nical models or eac& ridge sites to assist sustructure detail design and s&all include t&eollo'ing

1. 6ore&oles s&all e laid out on$site s"stematicall" according to set drill plan.2. 9&ere re>uired8 arrangements 'ill e made or locating and clearing o underground

services prior to advancing t&e ore&oles.3. ; re>uired8 permits or t&e ield'or, s&all e applied or8 and otained rom t&e #epartment

o nvironment B Conservation )#C*.4. T&e susurace conditions s&all e e7plored " drilling8 sampling and logging a total o si7

)* e7plorator" ore&oles as ollo's

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a* T'o )2* ore&oles augered to 3 meters elo' e7isting grade )meg* or practicalreusal 'it&in t&e e7isting approac&esH

* At least our )4* ore&oles to a dept& o 10 meg )or practical reusal* or ridgestructure8 as ollo's

i. T'o )2* ore&oles located e&ind t&e e7isting autments8 Jin t&e dr"K )i.e.

not intersecting an" open 'ater*H andii. T'o )2* ore&oles advanced t&roug& t&e e7isting ridge dec, and do'n

into t&e open 'ater8 'it& suse>uent sampling o t&e cree,Driver ottomminerals

c* At least 1./m o diamond coring s&all e conducted upon encountering practicalreusal in eac& o t&e our deeper ore&oles8 to conirm and c&aracterise t&eedroc,.

/. 9ater levels s&all e otained directl" rom t&e open ore&oles during ield operations.. @aorator" anal"sis o minerals encountered s&all e perormed8 including grain sies and

moisture content test on t&e soil sample8 and compressive strengt& testing o edroc, coresamples.

. uentl" impacted on t&emaintenance cost o t&e ridges.

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7.1.= Peestrian Traffic Consieration

Special consideration or design o pedestrian 'al,'a" or ridges near densel" populated sites 'ille considered in t&e preliminar" design. As muc& as possile8 t&e 'al,'a" 'ill e design to attac&to t&e ridge. nl" on instances '&ere8 space is limited and or over&ead pedestrian ridge is

'arranted8 it 'ill e design separatel".

7.1.< Construction Consierations

Constructailit" issue 'ill e assessed in detail under t&is e7ercise during t&e detail investigationp&ase. Assessment 'ill e made on diicult terrain eature8 scares construction material 'it&inconstruction pro7imit" and importantl"8 local contractor capacit" to underta,e construction usingspecialist construction tec&ni>ues. Given t&e upgrade re>uirements8 specialist constructionmaterials and aricating tec&ni>ues is anticipated to construct ridge8 preeral" o Steel GirderConcrete #ec, )SGC#* composite s"stem and post$tension reinorced concrete ridge o

incremental launc&ing tec&ni>ues. uirements.

7.+ Preliminar $rige Design

7.+.1 #eneral

6ridge is a simple "et possesses comple7 stress distriution proile due to interconnection o

dierent ridge parts8 &ence8 re>uire specialist anal"sis tec&ni>ues suc& as inite element anal"sisto accuratel" predict and simulate its structural response under various loading conditions. Asmentioned in Section .1.38


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Roust inite elements anal"sis )uentl" perormed anal"sis to determinecritical section o t&e ridge 'it& &ig& stress proile. T&e anal"sis 'ill cover several options as parto t&e preliminar" design and optimum model meeting ot& engineering and economics 'ill erecommended or detail design. T&e


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standard design lane '&ile t&e locations o concentrated loads 'ill e at critical position determine rom

inluence lines calculations. T&eir ootprints precisions 'ill e created on t&e model dec, " partitioning.

)igure -.0 '1@00 'o,ing Traffic &oaA as publishe in %" ;100.+ B 2+0054

T&e code speciies multiple design loads '&ic& needed to e considered. Some load speciication 'ill also

e considered suc& as punc&ing s&ear around '&eel load oot prints in lig&t o t&e :%!C roust mec&anical

properties to 'it&stand impact loads. 9ind and eart&>ua,e loads 'ill also e considered in t&is stud".

T&e d"namic load allo'ance actor )Ld* 'ill e ta,en to sustain t&e increased traic loading caused " t&e

interaction o truc, loading and ridge structure as e7plained in t&e static e>uivalent d"namic and virator"

eects according to AS /1000$Australian 6ridge #esign Code.

7.+.-.- )ull an Partial &oaing Configurations

:nder t&is stud"8 ot& ull and partial loading 'ill e considered or ma7imum delection and

ending moment response and t&e later or ma7imum torsion and cantilever eect.


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)igure +.0 )ull an Partial &oaing Configuration

7.+.- Numerical 'ethos 2)inite lement %nalsis4


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rom American Association o State %ig&'a" and Transportation icials)AAS%T* 'ill e utilised in

t&is stud" and are given " t&e ollo'ing e7pressions

!1)

!2)

T&e delection limit criteria speciied " >uation )1* and )2*8 'ill e used to assess and recommend t&e

suitailit" o t&e span lengt&s t&at can e sael" otained rom eac& ridge sites in lig&t o t&e 4$lane

upgrade re>uirements. ;n addition8 cross$section optimisation 'ill also e investigated optimum cross$

section coniguration 'ill e include in t&e preliminar" design.

7.+.-.+.+ %nalsis Progression

T&e delection o ridge is mainl" controlled " t&e span lengt&8 t&e numer o girders and its cross

section coniguration and longitudinal prestressing tension )@!T* level '&ere t&e latter is

suse>uentl" controlled " t&e longitudinal prestressing topolog" and area. T&ose

varialesDparameters 'ill e careull" investigated during anal"sis and accounted or in t&e

preliminar" design.

Accordingl"8 t&e anal"ses to estalis& t&e ade>uate coniguration to reduce delection o all t&e

ridge are divided into our main steps.

1. Generating


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!reliminar" design report 'ill s&o' t&e delection response o t&e various ridge cross$section

coniguration and '&ere post or prestressing strand is used8 0 percent o t&e ?inimum 6rea,ing

@oad )?6@* speciied " t&e AS /100 and prescried " industr" standards )Structural S"stem* 'ill

e applied.

7.+.-.+.- Discussion of Results

T&e results otained rom t&e anal"sis 'ill e s"nt&esised8 anal"sed and discussed to comment on its

signiicance 'it& respect to load distriution and overall ridge structural response. Results 'ill e plotted

'it& appropriate statistical program suc& as =R8 ?AT@A6 and spread s&eet and recommendation 'ill e

made on t&e trend oserved. T&e results otained 'ill e used to perorm preliminar" design and

documentation 'it& appropriate engineering conclusions and recommendations to e incorporated during

t&e detail design and construction p&ase.

7.+.5 &oa Distribution

7.+.5.1 Introuction

T&e lo' o t&e s&ear orce8 ending moment8 reaction and torsion rom point o application to all ot&er

locations 'it&in t&e structure 'ill e investigation and accomplis&ed t&roug& structural mec&anics principles

aided 'it&


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!22)

"#ere$

Dms% appropriate girder Moment Distri&ution 'actor

M % (ending Moment o&tained from t#e simplified &eam sstem

7.+.5.- 'oment &oa Distribution

T&e cross section geometr" properties o t&e girder )suc& as8 second moment o inertia8 and neutral a7is*

'ill e calculated t&e girder cross$section t"pes o Super T girder used. T&e normal stress )M* at mid$span

'ill e otained rom uation )3* elo'.

!*)

"#ere$

+ % Second Moment of +nertia of t#e girder

% Dept# of t#e neutral ais

- % ormal stress at mid/span o&tained from '0

%ence8 t&e ma7imum ending moment o simpl" supported eam at t&e midspan o eac& model 'ill e

!2)

7.+.5.5 "hear &oa Distribution

7.- Reporting Re?uirements

Reports or preliminar" design )including investigation* 'ill e prepared to cover a t&oroug&discussion o all actors aecting t&e site and considerations leading to selections o t&e ridgingoption recommended or inal design. As a minimum8 t&e report 'ill discuss t&e ollo'ingH

i) Sure Report T&is report is to ormall" revie' t&e surve" and to advice o t&e selected &oriontal andvertical alignment. Slig&t c&anges to t&ese alignments ma" occur as a result o ridge&"draulic assessment and detailed evaluation o ridging option.

ii) lignment report

T&e report 'ill contain t&e ollo'ing minimum inormation

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a* Results o des,top studies o site geolog" and previous geotec&nical investigations* #iscussion on stream stailit" ased on site oservations and availale

p&otograp&" o t&e sitec* Revie' o previous reports on t&e sited* servations made during ield inspections

e* !reliminar" inormation on t&e catc&ment &"drolog" and on e7isting stream&"draulics )including recorded8 oserved and reported lood levels*

* #iscussion on possile ridge and approac& road alignmentg* #etails o an" near" ridging and in particular8 oundation t"pe used&* @ocal communit" needs and saet" re>uirements t&at aected alignment8 design

and constructioni* Si7 p&otograp&s )in colour* suicient to s&o' t&e site and stream as 'ell as

eatures li,el" to aect t&e design o an" ne' ridge8 and to s&o' t&e generalcondition o t&e e7isting structure

(* @ocal environment8 environmental considerations or t&e recommended option)nvironmental statement or preliminar" ;A* and special actors re>uiring urt&er

evaluation in t&e inal design,* @and use and vegetation in t&e area and in t&e immediate vicinit" o t&e ridge.

9ater use rom t&e riverl* @ocal climatem* Site stailit"n* rosion and scour at t&e site and t&e inluence o t&e recommended option on

uture river stailit" and an" recommendations or scour protection 'or,s or rivertraining strategies associated 'it& t&e recommended ridging option

o* #iscussion on t&e various ridging options considered 'it& 6eneit Cost Ratioased on lie c"cle cost

p* Construction material re>uirements and sources o t&ese materials>* #iscussion o an" special construction tec&ni>ues re>uired or t&e recommendedoption

r* #etailed construction cost estimates8 including (ustiication or rates adopteds* Traic and pedestrian saet" eatures re>uired in t&e inal designt* !roposed provisions or traic and pedestrians during constructionsu* #etails o urt&er inormation re>uired eore proceeding to inal designv* #ra'ings or t&e recommended options

'* S,etc&ed o options and concepts considered7* S,etc&es to illustrate an" non$standard construction concept or detailing proposed

in t&e recommended option

"* Surve" !lans*


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conirm t&at t&e design and associated documentation &ave een approved or release and t&at all>ualit" control procedures &ave een satisactoril" completed.

#ra'ings Standards 'ill compl" 'it& t&e re>uirements o AS1100.1018 AS1100.4018 andAS1100./01

7.4.2 Documents

?icrosot oice application 'ill e utilised in t&e preparation o documents8 and in t&e st"le andmanner as speciied " #o9. #ocuments 'ill e supplied ot& in &ard and sot cop" and t&eprepared documentation 'ill e sumitted or approval o content8 la"out and ormatting.

7.; Design "tanars

7.5.1 Structure

T&e ridge structure 'ill e design using =52 A:STRA#S 6ridge #esign Code. T&e ollo'ingadditional re>uirements 'ill e applied

i* Geometric re>uirements or ridge superstructures 'ill e in accordance 'it& t&e #o9Standard 6ridge 9idt&s8 6arriers and Clearances.

ii* T&e :ltimate @imit State @oad


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T&is additional condition 'ill e included in t&e Transient ect - 3flood loads includingde&ris and impact loadings)A:STRA#S Clause 2.1.1.3*

b4 $acfill to %butment ashout@oads imposed on t&e structure due to 'as&out o t&e ac,illing condition. %oriontal

loads 'ill e calculated or t&e 'as& out level to t&e dec, level ut no materials 'ill eassumed in ront o autment piles '&en evaluating t&e loads generated or t&iscondition. ?aterials e&ind t&e piles 'ill e considered to e compacted. art&pressure supported " t&e piles 'ill account or arc&ing eects. T&is additionalconditions is to e included into t&e !ermanent ect - Jeart& pressure loadsK)A:STRA#S Clause 2.1.1.1*

c4 "cour at Piersuested.

T&e design 'ill consider t&e ollo'ing criteriai* T&e ridge superstructure 'ill e designed to &ave a clearance o aove t&e estimated

E100lood level suicient to pass logs and deris. T&e assessment o t&e clearance 'illta,e into account o t&e aove sensitivit" studies8 t&e li,el" volume and sie o derisand t&e ailit" o t&e superstructure to resist log impact or deris loads.

ii* Consideration 'ill e given to movement in t&e stream ed ot& lateral )due to streammigration* and verticall" due to accretion and deposition resulting rom c&anges inavailale ed materialO.

iii* River training and scour protection 'or,s 'ill e designed to t&e ollo'ing criteria

9or,s to suer no damage '&en su(ected to a E2lood

9or,s to sustain onl" minor damage and maintain complete protection to t&e structure

'&en su(ected to a E10lood

9or,s to prevent damage to t&e ridge structure '&en su(ected to a E100lood

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9ill consider t&e environmental implications o an" design8 especiall" t&e eects o

alu7 aove t&e site8 and stream stailit" do'nstream o t&e site.

Stream diversions are onl" to e proposed ollo'ing a t&oroug& evaluation o t&e long

term eects o t&e deviation.

?aterial sources or protection 'or,s s&all e identiied prior to t&e design.

Reduced standards ma" e considered or roust structures '&ere due considerations is given tot&e potential or deris load on t&e structure8 t&e implications o overtopping o t&e ridge dec,8 t&eeect on t&e stream do'nstream o t&e structure8 and t&e implication on t&e level o serviceprovided " t&e road. Reductions in t&ese standards 'ill onl" e used ater discussion 'it& andagreement o t&e #9.

7.5.! Road "or#s

Approac& road 'or,s s&all e designed to t&e re>uirements o t&e #epartment o 9or,s RuralRoad #esign ?anual. T&e design 'ill e appropriate or t&e class o road anticipated to service t&eridge 'it&in t&e irst 2/ "ears o ridge design lie.

7.5.4 $aintenance

Apparentl"8 maintenance o ridge is a ma(or concern and ne' designs 'ill limit components oridge '&ic& 'ill re>uire regular maintenance. #esigns s&all consider maintenance access and t&edurailit" o materials and detailing or all ridge components.

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%PPNDIC"

%ppeni 2%4 isting $rige Information 8 1stReconnaissance Data 2(ung Cree B

ainantu4

%ppeni 2$4 'ap sho/ing Roa %lignment > $rige &ocations 2(ung Cree B ainantu4

%ppeni 2C4 Photographs of isting $rige Conitions

R)RNC"

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Inception Report V3 Bridge Engineering

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Transcript of Inception Report V3 Bridge Engineering