tugas rekpon

8/19/2019 TUGAS rekpon

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TUGAS

REKAYASA PONDASI II

Jeremi Julian (1121011)

Ayuni Kresnaiyan!i Pu!ri (112101")

Pray#$i Ai Pu!ra (112102%)

&a'ul!as Te'ni' Jurusan Siil

Uniersi!as Kris!en *arana!+a

201,



0,5B = 0,5 . 3,6 = 1,8 m

2B = 2 . 3,6 = 7,2 m

B > F4 = 3,6 > 1,2 → qa= N

F 2

(B+ F 3B

)2

K d

K d=1+0,33( DB )=1+0,33(

1,53,6 )=1,137 5

- (m) N P#. ('N/m2) N N ##r

1,5 10 1,5 .19 = 28,5 1,83303 18,3303

2,5 11 2,5.19 = 47,5 1,41986 15,6185

3,5 15 3.19 + 0,5.11 = 62,5 1,2378 18,5671

4,5 18 3.19 + 1,5.11 = 73,5 1,14143 20,5457

5,5 24 3.19 + 2,5.11 = 84,5 1,06454 25,5491

6,5 26 3.19 + 3,5.11 = 95,5 1,00136 26,03547,5 29 3.19 + 4,5.11 = 106,5 0,94824 27,4989

8,5 31 3.19 + 5,5.11 = 117,5 0,90276 27,9856

9,5 34 3.19 + 6,5.11 = 128,5 0,86326 29,3508

Σ = 209,481

N rata= Σ Ncoor

n =

209,481

9=23,276 23

qa= N

F 2(B+ F 3

B )

2

K d= 23

0,08

.(3,6+0,3

3,6

)2

.1,1375=383,808 kN /m2



Qult ( pelat )=2450 kg → penurunan=6 mm

qult ( pelat )=Qult ( pelat )

A( pelat )

=2450

0,32 =27111,11kg /m

2

Untu tanah lempung :

qult ( pondasi )=qult ( pelat )=27111,11kg /m2

Daya duung !"!n #$a% p&nda'!

qa= qult

FK =

27111,11

3=9037,04 kg /m

2

(enu)unan untu p&nda'! #*% e)uu)an 3 - 3 m

S F =S p

B F

B p

=6 × 300

30=60 mm



B ( pondasi)3=

7500×0,305

575→B ( pondasi)=

3√ 3,97826087=1,584 1,6m

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