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APLICACIONES COMPUTACIONALESAPLICACIONES COMPUTACIONALES

APLICADO A MECANICA DE ROCASAPLICADO A MECANICA DE ROCAS

4ta. Clase.4ta. Clase.

Diseño Banco BermaDiseño Banco Berma

05 Enero 201205 Enero 2012

















: Tolerable factors of safety, Civil Engineering applications.

MaterialType

ConditionsAcceptance

level(Static)

Reference

Normal loads and service conditions 1.5 Meyerhof, 1984SoilEarthworks Maximum loads and worst environmental

conditions1.3

Normal loads and service conditions 2Earth

retainingstructuresandexcavations

Maximum loads and worst environmentalconditions

1.5

ohesionless soils 1.3

ohesive soils 1.5

!ased on field vane tests corrected for strainrate and anisotro"ic effects

1.3 !#errum $19%3&

1.25 !owles $19%9&

'i(hest value for serious conse)uence of

failure or hi(h uncertainty 1.25*1.5

+edney and e-er

$19%8&

1.5 'ansen $19%&

1.3*1.5 Meyerhof $19%/&

1.3*1.4 0owers $19%9&

ower values for tem"orary loadin(1.5

1.25*1.3era(hi $1943&

ermanent or sustained conditions 1.50 Navy 6e"artment

$192&

em"orary 1.25

Slopes

ermanent 1.5

07 : $1989&

07 : $1989&

nd of construction, no reservoir loadin(, "ore"ressure at end of construction estimates withundissi"ated "ore "ressure in foundations

1.3

;ull reservoir, steady state see"a(e withundissi"ated "ore "ressure in foundation

1.3

;ull reservoir with steady state flow anddissi"ated "ore "ressure

1.5

;lood level with steady state flow 1.2

a!s

<a"id draw down "ore "ressure in dam with

no reservoir loadin( 1.3

'oe= $1991&



Acceptance criteria, FoS, PoF an category of slope instability !S"an # Sep$lvea, %&&'(

haracteristics of nsta-ility 7cce"ta-ility riterion

0lo"ey"e

ase oss of<am" !erm

$>&

Material 7ffected$=tons?m&

;s f $>&omments

@25 @/.5?@1./

25*5/ @1./?@2./ @45

9x"ansion, notad#acent to a

ram"A5/ A1./?A2./ @35@25 @/.5?@1./

25*5/ @1./?@2./ @4/

9x"ansion,ad#acent to a

ram" A5/ A1./?A2./ @3/

@25 @/.5?@1./

25*5/ @1./?@2./ @35

;inal all, notad#acent to a

ram" A5/ A1./?A2./ @25

@25 @/.5?@1./

25*5/ @1./?@2./ @3/

!ench

;inal all,ad#acent to a

ram" A5/ A1./?A2./ @2/

!erms should have anominal width to containunravellin( wed(eswhose "ro-a-ility ofoccurrence is A3/>B

controlled -lastin( will -eused to minimise induceddama(e C "res"littin( on

the final wall slo"es

@5 A1.2/ @3/@25 A5 A1.25 @25

@5 A1.25 @25

5*1/ A1.3/ @2225*5/

A1/ A1.35 @2/

@1/ A1.3/ @22

1/*2/ A1.35 @2/

9x"ansion

A5/

A2/ A1.45 @18

@5 A1.2/ @25@25A5 A1.25 @2/

@5 A1.3/ @22

5*1/ A1.35 @2/25*5/A1/ A1.45 @18

@1/ A1.35 @2/

1/*2/ A1.4/ @18

nter*ram"

;inal all

A5/

A2/ A1.5/ @15

0ta-ility analysis mustinclude ex"licit effect of

roc= mass structuresB twoinde"endent access

ram"s will -e made to the"it -ottomB measures will-e im"lemented for slo"e

draina(e

@25 A1.3/ @15

25*5/ A1.4/ @129x"ansion

A5/ A1.5/ @1/

@25 A1.3/ @12

25*5/ A1.45 @1/

+lo-al

;inal allA5/ A1./ @8

0ta-ility analysis mustinclude mass structuresBall mine infrastructure lie

outside "it "erimeter limits



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