G2 Cut and Embankment Strategy Report_20141202_v1

8/10/2019 G2 Cut and Embankment Strategy Report_20141202_v1

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Sub-schedule A1 Design:

G2 Cut and Embankment Stability StrategyPreliminary Cut and Embankment Stability Strategy Reprt

D!S"R!#$"!%&

RE'!S!%& (!S"%R)

Revision Date Status Prepared Reviewed Approved

!SS$E

Prepared by:Reviewed by:Approved by: Project Director

Name Signature Date

File LocationComments:

oowoomba Second Range Crossing ProjectA! Design: Cut and "mban#ment Stability Strategy$%&$$'(!! !


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E*aluatin Criteria and +ey Cnsideratins

o be deleted )rom individual documents and only included in overarc*ing e+ecutive summary

Responses will be evaluated against t*e "valuation Criteria set out in t*e tables below, *e -eyConsiderations wit*in eac* "valuation Criterion do not )orm part o) t*e evaluation but *ave been provided ton)orm Proponents o) some .but not necessarily all/ #ey matters t*e State will consider in relation to eac*Criterion,

*e Lead Aut*or is re0uired to cross re)erence t*e relevant -ey Considerations t*at *ave been addressed in*is document by completing t*e table below, 1ou only need to cross re)erence t*e applicable Considerationsand all ot*ers can be le)t blan#, A consolidated tabled will be included in t*e 2verview )or t*e ReturnableSc*edule,

1a Pr,ect Scpe .unctinality3 t*e appropriateness o) t*e proposed design solution in terms o)ac*ieving or e+ceeding t*e Project Scope and Project Functional Re0uirements,

-ey Considerations Re)erence

*e State will evaluate t*e appropriateness o) t*e proposed commercial solutionincluding t*e owners*ip structure o) t*e entity t*at will enter into t*e Project Deedwit* t*e State,

-ey considerations in t*e evaluation o) t*is criterion will include:

ravel times

ra))ic capacity

ra))ic movements

Freig*t e))iciency4 )unctionality and )acilities

Road sa)ety )acilities and systems

Availability considerations .including )lood immunity4 slope stability4 pavementdurability and minimising maintenance/

5itigation o) environmental4 cultural resource and community impacts

Compatibility wit* )uture upgrades4 adjacent land use and6or proposeddevelopments,

1b 1b Design re/uirements3 t*e suitability o) t*e design solution to support t*e )unctional outcomesand ac*ieve or e+ceed t*e Project 5inimum Re0uirements )or all design elements,



-ey considerations in t*e evaluation o) t*is criterion will include:

Site investigation4 analysis and selection o) design input parameters

Application o) relevant design standards

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! $


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Design approac*4 met*odology4 analysis and6or modelling

Design outcomes and standard o) design reports and drawings

Constructability and 295 compatibility considerations

Construction material selection4 e0uipment standards and project speci)icconstruction speci)ications,

1c !nn*atin and 0hle-.-li.e cnsideratins3 t*e e+tent to w*ic* appropriate innovation andw*oleo)li)e optimisation *as been used to reduce overall cost4 improve )unctional outcomes4en*ance )reig*t e))iciency and6or provide road user bene)its .including t*e e+tent to w*ic* any designdepartures are clearly identi)ied4 e+plained and justi)ied/,



"n*anced design )unctionality

Additional design capacity or design li)e

7mproved road sa)ety )eatures .including design4 construction and 295/

5inimising maintenance re0uirements and provision o) maintenance access4particularly )or long li)e asset .;$% years/ components

angible and practical w*oleo)li)e cost improvement initiatives

"+amples w*ere t*e proposed tec*nical innovation or w*oleo)li)e optimisationapproac* *as been used success)ully in similar applications

*e e+tent to w*ic* any proposed departures )rom t*e Project 5inimumRe0uirements are clearly identi)ied4 e+plained and justi)ied

*e cumulative e))ect o) any proposed departures,

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!!


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Glssary

"erm De.initin

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! =


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Acrnym De.initins

"erm De.initin

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! %


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"able . Cntents

1 Eecuti*e Summary3

2 !ntrductin3

$,! Project 2verview,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'

$,$ Purpose and Scope o) Report,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'

4 Relatinship t Pr,ect %b,ecti*es3

5 Related Pr,ects11

=,! >arrego ?ig*way Duplication,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!!

=,$ 2@5aras Road Duplication,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!!

=,< oundary Street Bpgrade,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!!

6 Design Standards and Criteria 12

%,! Per)ormance Criteria,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!$

%,$ Design Standards,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!$

%,< 5R 8eotec*nical 5inimum Design Standards,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!$

%,= Design Assumptions,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!$

%,% Design "+clusions,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!$

7 8ethdlgy14

9 Gelgical and Getechnical 8dels15

&,! Design Parameters,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!=&,$ 8roundwater,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!=

&,< Critical Sections,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!=

Embankments16

,! Slope Stability Analysis,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!%

,$ Settlement Analysis,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!%

,< Foundation Preparation,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!%

,= "mban#ment Design Details,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!%

3 Cuttings 17

',! 8lobal Stability Analysis,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!

',$ -inematic Analysis,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!

',< Roc#)all Analysis,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!

',= Slope Sur)ace reatment,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!

',% Cutting Design Details,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!

1; 8nitring and !nstrumentatin19

!(,! "mban#ments,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!&

!(,$ Cuttings,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,!&11 Risk 8anagement1

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! &


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12 Cnclusin13

14 Re.erences 2;

15 Appendices 21

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! '


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1 Eecuti*e Summary*is s*ould be a *ig* level summary o) t*e content o) t*e report4 w*ic* can be read and appreciated by bot*ec*nical and nontec*nical readers, "ssentially4 a reader could read t*is section only and understand at a*ig* level our solution and *ow it will bene)it t*e Project 6 State 6 users,

>*ere possible ma#e obvious connections to relevant -ey Considerations4 "valuation Criteria and Project2bjectives, 7t@s also important to lin# to our strategy .a greater connection/ and #ey messages,

Response

2 !ntrductin

$,! Project 2verview*e oowoomba Second Range Crossing .SRC/ Project is t*e largest Commonwealt* 8overnment

commitment to a single road project in Eueensland@s *istory, Addressing a recognised constraint in t*eNational Land ransport Networ#4 t*e SRC will ensure )reig*t e))iciencies as well as signi)icantly improvingdriver sa)ety and community amenity,

*e SRC is a proposed bypass route to t*e nort* o) oowoomba4 appro+imately =! #m in lengt*, 7t willconnect t*e >arrego ?ig*way )rom ?elidon in t*e east4 to C*arlton .west o) oowoomba/4 and to t*e 8ore?ig*way at At*ol in t*e west, *e SRC is t*e centrepiece o) major economic development ta#ing place insout*western Eueensland and once complete will create a sa)er4 )aster and more e))icient route )orconnecting )reig*t to major ports and mar#ets

*e Ne+us 7n)rastructure consortium comprises global leaders in Public Private Partners*ips .PPP/ and t*edesign4 construction4 operation4 maintenance and )inance o) transport in)rastructure, >e bring toget*er t*edeal balance o) international leaders and *ig*ly e+perienced4 Eueenslandbased resources and o))er t*eState )ull project capability4 world@s best practice4 an unrivalled dept* o) resources4 )inancial capacity4 local#nowledge and insig*t and an enviable trac# record o) success)ul4 proven delivery o) comparable projects at aocal4 national and international level,

Ne+us 7n)rastructure is committed to wor#ing in partners*ip wit* t*e State to ac*ieve and e+ceed t*e Project2bjectives and to drive outcomes t*roug* innovation4 value )or money4 w*oleo)li)e e))iciencies and a desire toa create a worldclass transport solution )or Eueensland,

$,$ Purpose and Scope o) ReportResponse

4 Relatinship t Pr,ect %b,ecti*es*e State@s Project 2bjectives are as )ollows:

! Address a recognised constraint in t*e National Land ransport Networ# by improving t*e e))iciency o))reig*t movements and encouraging economic development

$ Deliver greater bene)its )or road users and reduce t*e number o) *eavy ve*icles and t*roug*tra))ic usingurban arterial roads in central oowoomba

< 7mprove sa)ety on t*e networ# by providing an improved standard o) range crossing wit* improved design)eatures

= 7mprove community amenity4 sa)ety and )unctionality by directing *eavy ve*icle tra))ic away )rom t*e current

range crossing and oowoomba town centre% 7mprove transport capacity over t*e range to meet )uture growt* needs in t*e region

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! !(


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Protect and4 w*ere possible4 en*ance natural and cultural resources4 and t*e environment

& Support sustainable communities and land use development

Ac*ieve value )or money outcomes )or t*e State

' Secure timely delivery o) SRC!( Procure t*e Project in a way t*at encourages private sector innovation on tec*nical and commercial

aspects o) t*e Project,

Response

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! !!


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5 Related Pr,ectsResponse

=,! >arrego ?ig*way Duplication

=,$ 2@5aras Road Duplication

=,< oundary Street Bpgrade

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! !$


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6 Design Standards and 8ethdlgy

%,! Critical emban#ments and cuttingsA critical crosssection *as been identi)ied )or eac* emban#ment and cutting based on t*e *eig*t andprevailing geology,

Detailed analysis *as been underta#en on t*e )ollowing cross sections,

Table 1 Critical cutting cross sections

Feature From o otal Lengt*mG

5a+imum Cutting ?eig*t .m/

Cut ($ $$&& $&<

Cut $! !$(!$ !$(! &' %!

Cut $= !

Cut $% !==% !=(<

"mban#ment$orstcaserain)all eventE$(((

J>orst caseKgroundwaterlevel

!,( !,=

% Rapiddrawdown

Drawdown)rominundationlevel

A

2peratingasis"art*0ua#e.2"/

JAverageK orJestestimateKgroundwaterlevel

!,!% !,$!

,$ Settlement AnalysisAL" 2 " F7NAL7S"D F2LL2>7N8 C25PL"72N 2F ANAL1S7S

Table " Embankment Settlement nalysis !esults

D Appro+imate?eig*t .m/

Compressible Layer

*ic#ness.m/

"stimated Settlement .mm/

"lastic Primary Secondary

otal

,< "mban#ment Design Details

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! !


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AL" 2 " F7NAL7S"D F2LL2>7N8 C25PL"72N 2F ANAL1S7S

Location 7tems Description

"mban#ment !& opsoil t*ic#ness

Bnsuitable t*ic#ness

Foundation preparation6groundimprovement

Partial colluvium replacement wit*roc#)ill below batter toe .see s#etc*/

"mban#ment drainage

"rosion protection measures

"rosion protection measures Roc#)ill outer Ione and vegetated batterslopes

Fill source >on )rom adjacent cuttingsatter Slopes and enc*ing !M:$?4 slope *eig*t !(m4 benc* widt*

=m

"mban#mentOoning

Oone 5RS(=Class

Oone >idt* CR .i)applicable/

Subgrade A6

Bpper Oone A6

2uter Oone A6

Core C 2ver $(m

Roc#)ill Roc#)ill % m at t*etop and


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9 Cuttings

&,! 7nitial geometry*e initial batter slopes were designed based on t*e roc# mass weat*ering pro)ile, Roc# mass weat*ering is agood indicator to depict t*e overall condition o) t*e slopes .w*ic* is indirectly related to degree o) )racturing4strengt* and material properties/, *e initial batter slopes pro)iles are summarised in "rror: Re)erence sourcenot )ound, "ac* Ione was assigned appropriate 5o*rCoulomb parameters t*at were derived )rom lit*ologyweat*ering parametric study presented in 8! 3 Preliminary 8eological and 8eotec*nical Report, *e stabilityanalyses o) t*ese initial pro)iles were carried out using SL2P"6> so)tware,

Table # $atter slo%es for initial design

Roc# 5ass weat*ering atter slope .M:?/

Residual soils4 colluvium4 e+tremely weat*ered

basalt4 e+tremely weat*ered and *ig*ly weat*eredsedimentary roc# !M:$? .$& degrees/ to !M:!,%? .*en a)ailure mode was identi)ied4 an appropriate stability analysis .eg planar or wedge/ was carried out and t*eresults )or eac* cut presented in t*e )ollowing sections,

&,$ Slope Stability Analysis"ngineering so)tware pac#age 8eoSlope SL2P"6> Mer, $((& was used to carry out t*e cut section stabilityimit e0uilibrium analyses, *e 5orgenstern and Price .*al)3sine )unction/ met*od and optimisation o) t*ecritical slip location *ave been adopted )or t*e analyses in t*e SL2P"6>, ot* local and global stability o) t*eslip sur)ace )or t*e cut section *ave been assessed,

*e stability analyses are based on t*e selected critical cuts s*own in able !, *e summary o) t*e minimum)actor o) sa)ety )or eac* critical cut and )or eac* load case is presented in able ,

AL" 2 " F7NAL7S"D F2LL2>7N8 C25PL"72N 2F ANAL1S7S

Table & Summary of stability analyses

Location

7D Load Case 8roundwater Level

8eometry Factor o) Sa)ety Comments

Re0uired Ac*ieved

Cut !( ! Long term3PieIometric

JAverageK orJestestimateKgroundwater

level

!M:(,%? !,% $,&=8lobal and localstabilty satis)iesre0uired F2S,

$ Long term 5inimum Ru !M:(,%? !,% $,!< 8lobal and local

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! !


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3 Ru coe))icient(,!%

stabilty satis)iesre0uired F2S,

< Long term3 wit*tensioncrac#minimum$,%m


!M:(,%? !,< $,&orstcaserain)alleventE$(((


!M:(,%? !,( $,


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eventE$(((

level!M:!? slopes

re0uired F2S,

!M:!? on allbatters

!,($

% 2peratingasis"art*0ua#e.2"/


!M:!,%? and!M:!? slopes

!,!% !,%

8lobal stabilitysatis)ies t*ere0uired F2S,?oriIontaldesignacceleration o)(,( 5udstone 6Claystoneparameters

Low F2S )orbenc*intersecting >5udstone 6Claystone

$ Long term

3 Ru

5inimum Ru

coe))icient(,!%

8lobal

Local!M:!,(!,%?atters.All e+ceptbottom batterslope/

!M:(,%?atters.ottom batterslope/

!,%

!,%

!,%

!,% !,

!,< $,!

!, !,'

F2S ; !,= )or

lower bound> 5udstone 6Claystoneparameters

Low F2S )orbenc*intersecting >5udstone 6Claystone

< Long term3PieIometricwit*ensionCrac#


Floodedtensioncrac# inresidualmaterial4minimum

$,% m dept*

8lobalLocal

!M:!,(!,%?atters.All e+ceptbottom batterslope/

!M:(,%?atters.ottom batter

slope/

!,orst CaseRain)all

J>orst caseKgroundwater

8lobal !,( !, !,& F2S ; !,= )orlower bound

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! $(


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"ventE$(((

level Local 3 N6A > 5udstone 6Claystoneparameters



8lobal

Local 3 N6A

!,!% !, !,' ?oriIontalAccelerationFactor (,( 5udstone 6Claystone

parametersCut $& ! Long term

3PieIometric


8lobal !,% ;65>asalt

!M!,%? and!M:(,? inResidual Soil

!,% ;!,% argeting RSQC?!%(( and?> asaltQC?!%&%(

F2S satis)ied

$ Long term3 Ru (,!%

5inimum Rucoe))icient(,!%

8lobal !,% ;$,'< 8lobal stabilitysatis)ies t*ere0uired F2S,

Local

!M:(,&? and!M:(,?atters in?>65>asalt

!M!,%? and!M:(,? inResidual Soil

!,% !,!% argeting RSQC?!%(( and

?> asaltQC?!%&%(

Desired FoS notac*ieved wit*inResidual Soilbatter at!M:(,?

< Long term3PieIometric

wit*ensionCrac#

JAverageK orJestestimateK

groundwaterlevel

8lobal

!M:(,&? and

!M:(,?atters in?>65>

!,< ;


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Floodedtensioncrac#4minimum $,%

m dept*4 inresidual soil

asalt

!M:!,%? and!M:(,? inResidual Soil

= >orstcaserain)alleventE$(((


8lobal

!M:(,&? and!M:(,?atters in?>65>asalt

!M:!,%? and!M:(,? in

Residual Soil

!,( ;$,% 8lobal stabilitysatis)ies t*ere0uired F2S



8lobal

!M:(,&? or)latter

!,!%


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7denti)ication o) potential )ailure modes .eg, planar4 wedge/ based on c*osen )riction angle

7) t*ere was a potential )or )ailure to occur4 t*en stability analysis was carried out )or t*e )ailure modeidenti)ied

7) t*ere was no potential )or de)ect controlled )ailures4 no bloc# )ailure stability was carried out,

*e de)ect data )rom televiewer was plotted and cluster between $ to sets were identi)ied on stereoplots )oreac* cut able ',*e mean planes identi)ied )rom t*e stereoplots were used )or #inematic analysis )ordenti)ication o) )ailure modes .>yllie !''$4 >yllie 9 5a* $((%/,

t s*ould be noted t*at in #inematic analysis4 only potential )ailure modes are identi)ied based on t*e estimated)riction cone angle, *is analysis does not include ot*er )actors suc* as t*e e))ects o) ground water4 e+ternaloads and s*ear strengt* o) discontinuities and it s*ould not be mista#en )or stability analysis,

*e conditions re0uired )or t*e various )ailure modes in roc# is as )ollow:

942 Planar yllie 9 5a* $((%/:

*e sliding plane must stri#e parallel or near parallel wit*in appro+imately $(o )rom t*e slope )ace *e sliding plane must daylig*t on t*e slope )ace

*e dip o) t*e plane must be greater t*an t*e )riction angle o) t*e plane

*e upper end o) t*e sliding sur)ace must eit*er intersect t*e upper slope .eg on benc*/ or terminate in atension crac#,

944 =edge 7N8 C25PL"72N 2F ANAL1S7S

Table ' Summary of (inematic nalysis

Location Cuttinggradient

5ajor ointSet

Dip DipDirection

ConeFrictionAngle.deg/

Potential Failure

oppling Planar >edge

Cut !( !M: (,%? ! = $


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= .random/ !<


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Cut $! !M: !? .L?S/ Sets ! 9 < N6A 3 Bnli#ely tooccur

N6A 3 Bnli#ely tooccur

>edge volume 3(,($medge weig*t 3(,(&t

trace lengt* 3 !mF2S 3 =,'=

>edge volume 3(,$(%medge weig*t 3(,%edge volume 3(,$%medge weig*t 3(,ttrace lengt* 3 $mF2S 3 edge volume 3(,(!edge weig*t 3(,(edge volume 3(,!((medge weig*t 3(,$edge volume 3(,((medge weig*t 3(,($ttrace lengt* 3 !mF2S 3 ,!'

>edge volume 3(,(%$medge weig*t 3(,!=t

trace lengt* 3 $mF2S 3


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!M: !? 9!M:(,%?


N6A 3 Bnli#ely tooccur N6A 3 Bnli#ely to

occur

7nterbeddedSandstone 6Siltstone 65udstone

!M:!?9!M:(,%?

Sets ! 9 $ L?S 9 R?S:N6A 3 Bnli#ely tooccur

L?S 9 R?S:N6A 3 Bnli#ely tooccur

L?S:N6A 3 Bnli#ely to2ccur

R?S:

>edge volume 3(,= medge *eig*t 3(,'< onnes

race lengt* 3

%,=$ to ,= mF2S.a/ 3 !,&

Cut $& !M: (,&?.R?S/

Set ! vSet =



>edge volume 3(,($medge weig*t 3(,!(ttrace lengt* 3 !m"+ternallyapplied )orce 3(,!t>ater pressure

in slope 1esF2S 3 !,%

!M: (,&?.L?S/

Set $ vSet edge volume 3(,(!!medge weig*t 3(,($ttrace lengt* 3 !m"+ternallyapplied )orce 3No

>ater pressurein slope No

F2S 3 (,&!

!M: (,&?.L?S/

Set $ vSet =



>edge volume 3(,($=medge weig*t 3(,(,


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F2S 3 !,=

&,= Roc#)all AnalysisAn engineering so)tware pac#age4 RocFall Mersion =,($ .)rom Rocscience/4 *as been used )or t*e assessmento) t*e cut slopes at ris# o) roc# )alls, RocFall is a two dimensional statistical analysis o) roc# )all and is basedon a lumped mass model by using t*e Newtonian e0uations o) motion and t*e conservation o) energy principleo calculate t*e #inetic energy o) a boulder )alling4 bouncing and rolling down to t*e toe o) t*e slope,

n t*e assessment o) roc# )all t*e )ollowing assumptions *ave been made:

*e release point o) a loose bloc# is assumed to be )alling )rom t*e top o) a & m or !(m batter *ig* batterslope

"ac* simulation case is assumed to release %(( loose bloc#s

wo scenarios o) contact sur)ace )or t*e roc# )all are assumed as )ollows:

Scenario A: Soil wit* little vegetation on benc* sur)ace

Scenario : Clean *ard roc# cut benc* sur)ace wit* no vegetation,

*e coe))icient o) restitution e+tracted )rom t*e RocFall manual )or t*ese scenarios in t*e analyses aresummarised in able !!below,

Table 11 Contact surface materials %arameters for !ocFall

Scenario Contact sur)ace o) materials Coe))icient o) Restitution

Rn .Normal/ R .angential/

5ean St, Dev, 5ean St, Dev,

A Clean *ard roc# cut sur)ace (,%< (,(= (,'' (,(=

Soil wit* little vegetation on cut sur)ace (,= (,(= (,' (,(=

A 9 Pavement road (,=% (,( (,' (,(

*e )riction angle o) loose bloc#s on to t*e contact sur)ace in t*e analysis is assumed to be


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&,% Discussion and Recommendations2 " F7NAL7S"DF2LL2>7N8 C25PL"72N 2F ANAL1S7S

&,

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! $


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8nitring and !nstrumentatin

,! "mban#ments2 " BPDA"D

,$ Cuttings2 " BPDA"D

oowoomba Second Range Crossing Project SR7CL1 C255"RC7AL 7N C2NF7D"NC"A! Design: 8$ Cut and "mban#ment Stability Strategy$%&$$'(!! $'


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3 Risk 8anagement2 " BPDA"D F2LL2>7N8 C25PL"72N 2F ANAL1S7S



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1; Cnclusin2 " BPDA"D F2LL2>7N8 C25PL"72N 2F ANAL1S7S



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11 Re.erences



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12 Appendices Appendi+ A 3 "mban#ment Design Calculations

Appendi+ 3 Cutting Design Calculations



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Documents

G2 Cut and Embankment Strategy Report_20141202_v1