(5) gorong-gorong
TRANSCRIPT
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7/24/2019 (5) Gorong-Gorong
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[HASAN BALBAID]
PERENCANAAN GORONG-GORONG
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Elevasi Hulu D1Ka
El. Muka Tanah Asli = +163,42
El. Tanggul = + 163,56
El. Muka Air = + 163,06
El. Dasar Saluran = + 162,26
Elevasi Hilir D2Ka
El. Muka Tanah Asli = +162,54
El. Tanggul = + 163,39
El. Muka Air = + 162,89
El. Dasar Saluran = + 162,09
Dimensi Saluran
Q = 1,458 3!"#
$ = 0,81 !"#
% = 1,44
h = 0,80
i = 0,0015
= 1
n = 1,8
& = 0,50
'an(ang saluran = 1129,8
)arak g*r*ngg*r*ng = 450
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[HASAN BALBAID]
Elevasi Pada Hulu Gorong - gorong
El.Muka Tanah Asli = 162,54 +
8,1129
-25,4450 +
163,42 / 162,54--
= + 162,89
El. Dasar Saluran = 162,09 +
8,1129
-25,4450 +
163,26 / 162,09--
= + 162,16
El. Muka Air = 162,16 + h
= 162,16 + 0,8
= + 162,96
El. Tanggul = 162,96 + &
= 162,96 + 0,5
= + 163,46
Elevasi Pada Hilir Gorong - gorong
El.Muka Tanah Asli = 162,54 +
8,1129
-25.4450
163,42 / 162,54--
= + 162,89
El. Dasar Saluran = 162,09 +
8,1129
-25.4450
163,26 / 162,09--
= + 162,16
El. Muka Air = 162,16 + h
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[HASAN BALBAID]
= 162,16 + 0,8
= + 162,96
El. Tanggul = 162,96 + &
= 162,96 + 0,5
= + 163,46
lasiikasi (alan )alan an#ark*#a!)alan k*lk#*r rir!las A
)alur 2 3,5 #r
Analisa Perhitungan
1 Kecepatan rencana ditetapkan 1,50 m/dt 2,00 m/dt
Direncankan Va = 1,50 m/dt
Diana
Q = A $a
A = Q ! $a
=
!"#1,50
!"#1,458 3
= 0,9 2
2 Jika direncanakan bentuk penampang persegi, bahan saluran batu kali (K=0!
% = n h n = 1,80
= 1,80 h
A = % h
0,9 2 = 1,80 h h
1,80 h2 = 0,9 2
h = 0,3
Maka 7
% = 1,80 h = A ! '
= 1,80 . 0,3 = 0,9 ! 2,9
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= 1,32 = 0,35
' = % + 2h = 1!6
= 1,32 + 2 . 0,3- = 60 0,35-1!6
= 2,9 = 50.32
" Kehilangan #nergi
$a = 1,50 !"#
$ = 0,81 !"#
h asuk =
g
VVa
2
-5,0
2
=
-81,92
-0,8150,15,0
2
= 0,012
h kluar =
g
VVa
2
-1
2
=
-81,92
-0,8150,100,1
2
= 0,024
:h =$%&
$'Va2
2-
=
35,032,50
50,8-50,12
2
$
$
= 0,022
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h = h asuk+ h kluar+ h
= 0,012 + 0,024 + 0,022
= 0,058
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