PRACTICA DE CATEDRA

a) Volúmenes de arcilla y piedra

V arcilla=?Volumen de arcilla 1V 1=[ (0.5∗60∗20+0.5∗20∗40+5∗20 )∗500 ]

V 1=550000mc3

Volumen de piedra 2

V 2=[√602+202∗0.5+√202+402∗0.5 ]∗500

V 2=26991.728mc3

CALCULO DE PRODUCCIONES

PRODUCCION DE LA TOPADORA

PRT=(CH

t )∗f

CH=0.8∗L∗H 2=0.8∗3∗1.202=3.456ms3

De tablas

t f =0.20min Transmisión Directa

t v=t 1+ t2+t 3=d1

0.5v1a

+d2ve

+d3vrev

t v=0.012kmh0.5∗3.5km

+ 0.022kmh4.8km

+(0.012+0.022 ) kmh

7.5 km

t v=0.016h

t=t f +t v=0.2060

+0.016=0.0193h

Factor de corrección

f=f t∗f p∗f o∗f a

f t=5060

f p=1−0.02∗i=1−0.02∗25=0.5

f a=1−0.05d230

=1−0.05∗2230

=0.96

f o=0.80

f=5060

∗0.5∗0.96∗0.80

f o=0.32

PRT=( 3.4560.0193 )∗0.32

PRT=57.302ms3

h

PRT para la arcilla

PRT 1=57.302

ms3

h∗1mb

3

1.35ms3

PRT 1=42.446mb3

h

PRT para la piedra

PRT 2=57.302

m s3

h∗1mb

3

1.67ms3

PRT 2=34.313mb3

h

PRODUCCION DE LA RETROEXCAVADORA

Piedra

PRT=(C r

t )∗f

Capacidad real de la cuchara

C r=Cn∗F¿

F ¿=0.675

C r=2ms3∗0.675=1.35ms

3

Tiempo de ciclo

t=0.6 min∗1h60min

=0.01h

Factor de corrección

f=f c∗f t

f t=5060

f c=¿ 0.50

f=5060

∗0.50=0.42

PRT=( 1.35ms

3

0.01h )∗0.42∗1mb3

1.67ms3

PRT=33.952mb3

h

Arcilla

PRT=(C r

t )∗f

Capacidad real de la cuchara

C r=Cn∗F¿

F ¿=0.70

C r=2ms3∗0.70=1.40ms

3

Tiempo de ciclo

t=0.6 min∗1h60min

=0.01h

Factor de corrección

f=f c∗f t

f t=5060

f c=¿ 0.50

f=5060

∗0.50=0.42

PRT=( 1.40ms

3

0.01h )∗0.42∗1mb3

1.35ms3

PRT=43.56mb3

h

PRODUCCION DEL VOLQUETEDatosC v=10ms

3

W volquete vacio=30 ton

t d=2min

Arcilla

F ¿=0.7(Arcilla dura)

C rc=F¿∗Cnc=0.7∗2.00ms3=1.4ms

3

nvc=Cnv

C rc

=10ms

3

1.4ms3=7.14

~¿7VIAJES

C rv=nvc∗Crc=7∗1.40ms3=9.8ms

3<10ms3

t=t a+t c+t d+t r

t c=nvc∗t ce=7∗0.6min¿4.2min

t a=da

va

= 5km18.71km /h

∗60min¿16.03min

t d=2min

t r=dr

vr

= 5km6.75km /h

∗60min¿ 44.44min

t=4.2+16.03+2+44.44=66.67min¿1.11hr

Resistencias:

RT=RR± RP+RI+RA

AcarreoResistencia a la Rodadura

RR=f R∗W T=50kgton

∗(30+1.33∗10 )=2165kg

Resistencia por pendiente

RP=−10∗W T∗i=0

Resistencia Total

RT=RR± RP=2165kg

T D=RT=2165kg

T D=270 nPu

v

v=270nPu

T D

=270∗0.75∗2002165

=18.71km /hr

Retorno:

Resistencia a la Rodadura

RR=f R∗W T=50kgton

∗(30 ton )=1500kg

Resistencia por pendiente

RP=−10∗W T∗i=10∗30∗15=4500kg

Resistencia Total

RT=RR± RP=1500+4500=6000 kg

T D=RT=6000kg

T D=270 nPu

v

v=270nPu

T D

=270∗0.75∗2006000

=6.75km /hr

f t=4560

=0.75 (ruedas )

PRv=( 9.8ms3

1.11hr )∗0.75

PRv=6.62

ms3

hr∗1mb

3

1.35ms3

PRv=4.90mb3

hr

Piedra

F ¿=0.675C rc=F¿∗Cnc=0.675∗2.00ms

3=1.35ms3

nvc=Cnv

C rc

=10ms

3

1.35ms3=7.41

~¿7VIAJES

C rv=nvc∗Crc=7∗1.35ms3=9.45ms

3<10m s3

t=t a+t c+t d+t r

t c=nvc∗t ce=7∗0.6min¿4.2min

t a=da

va

= 5km17.61km /h

∗60min¿17.04min

t d=2min

t r=dr

vr

= 5km6.75km /h

∗60min¿ 44.44min

t=4.2+17.04+2+44.44=67.68min¿1.13hr

Resistencias:

RT=RR± RP+RI+RA

Acarreo

RR=f R∗W T=50kgton

∗(30+1.60∗10 )=2300kg

RP=−10∗W T∗i=0

RT=RR± RP=2300kg

T D=RT=2300kg

T D=270 nPu

v

v=270nPu

T D

=270∗0.75∗2002300

=17.61km /hr

Retorno:

RR=f R∗W T=50kgton

∗(30 ton )=1500kg

RP=−10∗W T∗i=10∗30∗15=4500kg

RT=RR± RP=1500+4500=6000 kg

T D=RT=6000kg

T D=270 nPu

v

v=270nPu

T D

=270∗0.75∗2006000

=6.75km /hr

f t=4560

=0.75 (ruedas )

PRv=( 9.8ms3

1.13hr )∗0.75

PRv=6.50

ms3

hr∗1mb

3

1.65ms3

PRv=3.94mb3

hr

PRODUCCION DE LA MOTONIVELADORA

PRMN=( a∗ln∗t )∗f

a=0.2m

l=3m

n=5

t=t av+t ret

t=dav

vav

+dret

vret

= 500m0.006m

hr

+ 500m

0.01mhr

=0.133hr

f=f t∗f k∗f d

f=4560

∗(1−0 )∗0.85=0.6375

PRMN=( 0.2m∗3m5∗0.133h )∗0.6375

PRMN=0.575m2

hr .x500m

PRMN=287.59mc

3

hrx

1mb3

(1−0.2 ) mc3

PRMN=359.49mb

3

hr

PRODUCCION DE LA COMPACTADORA

PRC=(1000∗a∗vc∗ec

n )∗f

a=2m

vc=6Kmhr

n=5

es=0.2m

ec=es1−C1+E

ec=0.2m1−0.21+0.35

ec=0.1185m

f=f t∗f k∗f d

f=4560

∗(1−0 )∗0.85=0.6375

PRC=(1000∗a∗vc∗ec

n )∗f

PRC=(1000∗2m∗6 Kmhr

∗0.1185m

5 )∗0.6375PRC=181.305

m3c

hr

PRC=226.63mb

3

hr