daya dukung data lapangan

7/18/2019 Daya Dukung Data Lapangan

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DAYA DUKUNG PONDASI TIANG

DATA LAPANGAN (SONDIR

DAN SPT)



Daya Dukung Ujung untuk Tanah Pasiran

Tiang Pancang :

Qp = 40 x N SPT x Ap (ton)Dimana,N–SPT = (N!N")#" N= $a%ga %ata&%ata N 'a%i 'aa% * 0&D *

N"= $a%ga %ata&%ata N 'a%i 'aa% * 4&D *+

DATA SPT



Nilai N – SPT Desain

adalah:

Ndesain = ½ (N1 +N2)

N!" N – SPT UNTU# D$S%N T"&"N"N U'UN% P"D" T"N"& P"S"N φ :

D

(4 x D)dirata-rata untukdesain tahanan ujung = N2

(10 x D)dirata-rata untukdesain tahanan u un = N1

Ground Surface

Tian ancan



Daya Dukung Ujung untuk Tanah PasiranTi ng )*r

=7 N (t/m2)

=400 (t/m2)

qp = 7 N (t/m2) < 400 (t/m2)



Tahanan %eser Seliut Tiang dari Tanah er,asir

-enurut Na.al $ngineering /a0ilities *and:

- Tiang Pancang :Q = 0-" x (N SPT) x Li x p (ton)

"- Tiang .o% :Q = 0- x (N SPT) x Li x p (ton)



Tahanan %eser Seliut Tiang *r ,ada Tanah er,asir

Ro/iani, Dncan an' .a%*% (11)

= 0.11 N (t/m2)

= 0.28 N (t/m2)

(=27.5 t/m2)

=0.32 N (t/m2) N < 53

Z=depth below ground surface

0.20 N



Da2a Dng Tiang +*%'aa%an Ni3aiSPT

• nit ta$anan /ng:5* (N#m") = 40 Nco% (L#D) 6 400 Nco%

(tiang pancang pa'a pai%)

• nit ta$anan g** *3imt:5 (ton#m") = 0-" N 6 0 ton#m"

5 (N#m") = " N 6 00 N#m"

• Dapat /ga '*ngan o%*3ai N&SPT '*ngan7 ++:



.*+*%apa o%*3ai N&SPT '*ngan 7

• Li$at 8ana3 9not

• 7 = (" N)0-; ! ; (8i2a$ita)

• 7 = (" N)0-; ! "0 (P*c)

•

7 = (" N)0-;

! "; (Dn$am)• 7 = ("0 N)0-; ! ; (Po3o < Dai, >i$i'a)

• 7 = (; N)0-; ! ; (S$ioi < ?i)

• 7 = ("0 N)0-; ! ; (@apan** Nationa3 Rai3a2)



Relationship between Cohesion and N-Value (Cohesive soil)

2/3 N



Relationship between n!le o" #nte$nal %$i&tion and N-Value('and 'oil)



Vande$ Veens (*+,7) ethod "o$ .ilesin Cohesionless 'oils (daa duun! uun!)

5p= %ata&%ata ta$anan

on 'i *'a3aman D 'iata /ng tiang 'an D'i+aa$?S = "-;



T$* in %iction on t$* pi3* $at in co$*ion3* oi3(8*2*%$o%, 1;B)

'ip3ac*m*nt pi3*

C&*ction pi3*

5c =%ata&%ata ta$anan on 'a3am g#cm" *pan/ang tiang3timit* in %iction, fs, mempunyai harga maximum 0Pant C&*ction,a maximm o ;4 Pa (ca3c3at*' on a33ac*o Eang* an' *+)



'&hme$tmanns ethod "o$Cohesionless and Cohesive 'oils

oint 1ea$in! Capa&it Qb in All Types of Soil Sc$m*%tmann (1F)



DATA



Da2a Dng Tiang +*%'aa%an PT

• nit ta$anan /ng 5*

• 5* = 0-; (5c ! 5c")

'imana: 5c = ni3ai 5c %ata&%ata pa'a /a%a L!0-. ampai L!4. 'i+aa$/ng tiang, 5c" = ni3ai 5c %ata&%ata

pa'a /a%a L ampai L&0-F. 'iata/ng tiang

DATASONDIR



Da2a Dng Tiang .*%'aa%anPT

• nit ta$anan /ng 5*

5* = 0-; (5c ! 5c")

'imana:5c = ni3ai 5c %ata&%ata

pa'a /a%a L!0-.ampai L!4. 'i

+aa$ /ng tiang,

5c" = ni3ai 5c %ata&%atapa'a /a%a L

ampai L&0-F. 'iata/ng tiang



Da2a Dng Tiang .*%'aa%anPT

• nit ta$anan g** tiang



"4

Ana3ii Da2a Dng +*%'aa% 'ata Son'i% (PT)(INDON9SIA)

• .*+an S*m*nta%a

• .*+an Stati T*tap

• .*+an Dinami

5

.

2

. f O p AQa +=

5

.

3

. f O p AQa +=

8

.

5

. f O p AQa +=



.ataan&+ataan ni3ai 5* 'an 5 (anta%a

3ain)

• Tiang pancang

& 5* 6 ;0 N5 tan φ (N#m") ata 5* (N#m") 6 400 Nco% (pai%)

- 5 (N#m") 6 00 (pai%)

- 5 (N#m") 6 0 (Tom3inon&pai%)

-5 (N#m

"

) 6 "0 (DNH&pai%) 'an 5 (N#m"

) 6 "00 (DNH&3*mpng)

- 5 (N#m") 6 0 (9not)

• Tiang +o%

- o'to +*%'aa%an p*n%nan ; Diam*t*%, 5*

(N#m") 6

"100 (pai%)

- 5* (N#m") 6 F0 (AS9&3*mpng)

- ON*i3, 5 (N#m") 6 10 (pai%)

- 5 (N#m") 6 "0 (DNH&pai%) 'an 5 (N#m") 6 "00 (DNH&

3*mpng)

- 5 (N#m") 6 0 (9not)-

" "



Da2a Dng IJin

41

;

−=

=

+=

FS

FS QQ

QQQ

ult izin

seult



?acto% o Sa*t2

• D*p*n' on man2 acto%, inc3'ing:

• – t2p* an' impo%tanc* o t$* t%ct%*

• – patia3 a%ia+i3it2 o t$* oi3

•

– t$o%og$n* o t$* +%ac* in*tigation• – t2p* an' nm+*% o oi3 t*t

• – aai3a+i3it2 o on&it* o% n*a%+2 33&ca3* 3oa'

• t*t

• – anticipat*' 3**3 o cont%ction monito%ing• – p%o+a+i3it2 o '*ign 3oa' +*ing *xc**'*'

• '%ing 3i* o t%ct%*



3aiKcation o St%ct%* <

L**3 o ont%o3

• St%ct%*:

• – monm*nta3: '*ign 3i* 002*a%

• – p*%man*nt: '*ign 3i* "; 2% an'M 00 2%

• – t*mpo%a%2: '*ign 3i* M "; 2%



?acto% o Sa*t2 o% D**p?on'ation o% Dona%' Loa'

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