7/23/2019 Laporan praktikum geologi teknik

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a. Water Content

Mw=MtMs=102.873.4=29.4 gram

w=Mw

Msx 100=

29.4

73.4x100=40.05

b. Void Ratio

Pada kondisi ini kita anggap bahwa Vw= Vv

w= 1 gr/m3, maka Gs=

s

w s=2.74x1=2.74 gr/m3

Vw Mw

w=

29.4

1 = 29.4 m3

VsMs

s=73.4

2.74=

26.79 m3

e=VvVs

= 29.426.79

=1.097

c. Porosity

Vt= Vv+ Vs= 29.4 + 26.79 = 56.19 gr/m3

n=Vv

Vt x100=

29.4

56.19x 100=52.32

d. Dry Density

d=Ms

Vt=

73.4

56.19=1.306 gr/m3

e. Total Density

t=Mt

Vt=102.8

56.19=1.83 gr/m3

Klasifikasi Tanah

%oars!"#rain!d Parti$!s &

% #ra'! = 49 %

% (and = 33 %

%)in!"grain!d parti$!s &

7/23/2019 Laporan praktikum geologi teknik

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a* and (it = 1 %

1- = -.-2

3- = -.6

6- =

o!i$i!nt o niormit* 0 = 6-/1-= 4--

o!i$i!nt o $r'atr! 0$ = 03-2/ 01- 6- = 2.25

%P = % " %P = 32 3- = 2 or

7/23/2019 Laporan praktikum geologi teknik

3/4

8!rdasarkan asiikasi :anah 8!rkran asar data di atas m!mpn*ai namaSilty

Gravel with Sand0;(: 247

Uji Constant Head

1. ik!tahi & h = 6- $m

= 15.6 $m

k = .59 1-"4m/d!tik = .59 1-"2$m/d!tikt = 15 d!tik

< = 15-- gram/15 d!tik = 1-- $m3/d!tik 0d!ngan asmsi air= 1 g/$m3

itan*a & r..>

?awab &

k=QL

@r2=QL

kh r=

QL

3.14k h

r= QL

3.14k h=

100x15.6

3.14x60x 0.0859

Hasil

7/23/2019 Laporan praktikum geologi teknik

4/4

= 1560

16.18356= 9.88!"!#$# c%

ABi )aing C!ad

1. ik!tahi& ; = 12 $m2

a = 3 $m2

= 16 $m

h1 = 1- $m

h2 = 9- $m

Dt = 25 m!nit = 15-- d!tik

itan*aE k..>

?awab &

k=2.3 aL

A t log10( h1h2 )=2.3

3x16

12x 1500log10( 18090)=2.3

48

18000x 0.3

k = .8$ & !'(c%)s

*ifat +ekanika Tanah

Test

,o.

-eban ,or%al n

/k,0

-eban 1eser saat

R2nt2h sfTe3an3an ,or%al

Te3an3an 1eser saat

R2nt2h

1 -.- -.13 2- 32.5

2 -.1 -.27 45 67.5

3 -.26 -.32 65 -

4 -.33 -.39 2.5 97.5

5 -.44 -.45 11- 112.5

6 -.55 -.53 137.5 132.5

8!rdasarkan hasi potting di dapatkan bahwa niai &

C4 5 (#

4 5 ("!