Word Jalan Ok!!
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ALINYEMEN HORIZONTAL
Alinyemen horizontal adalah proyeksi sumbu jalan pada bidanghorizontal. Alinyemen horizontal terdiri dari garis – garis lurus yang
dihubungkan dengan garis – garis lengkung. Garis lengkung tersebut
dapat terdiri dari busur lingkaran ditambah busur peralihan (spiral –
circle – spiral), busur peralihan saja (spiral–spiral), ataupun busur
lingkaran saja (circle).
Perhitungan Alinyemen Horizontal dengan skala 1:!!! :
Titik
Koordinat
jarak pdpeta(mm)
jarak sebenarn
ya (m)
sdt
(!"I)
#r(km$jam)
% y
A ! ! "#,!# ##$,11
P% 1#!,1$
!&#$,'''
,"$ "'," "!
P% # ,#$) &',1'# )',) $*,*$ $1 $!
P% ""$,")
&1$!,#$
'*,)' )#, #" )!
+",!1
'&##*,'*)
a& "er'itnan Ainyemen Hori*ontaSpiral – Circle – Spiral
engkung spiral merupakan peralihan dari bagain lurus ke
-ir-le. Panjang lengkung peralihan (spiral diperhitungkan dengan
mempertimbangkan bah/a perubahan gaya sentripugal dari nol
(pada bagian lurus sampai sebesar :
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s
L R
vm K
.
. 3
=
C
K V
C R
Vr Ls
.272,2
.022,0
3
min −=
0imana : s panjang spiral (m
2 ke2epatan ren-ana (km3jam
4 jari – jari -ir-le (m
5 perubahan ke-epatan(m3det"
dianjurkan harga 5 !,$
m3det"
k kemiringan melintang
6ari–jari circle yang diambil harus sedemikian sehingga
sesuai dengan ke-epatan ren-ana yang ditentukan serta tidakmengakibatkan adanya kemiringan tikungan yang melebihi
harga maksimum. 7emiringan tikungan maksimum dibedakan
antara jalan untuk antar kota (maksimum !,1! dan untuk
jalan kota (maksimum !,!'. +esarnya jari – jari lengkung
minimum berdasarkan rumus :
)(127
2
m f e
Vr R
+
=
dengan miring tikungan maksimum dan koe8sien gesekan
melintang maksimum.
0imana : 4 jari – jari lengkung minimum (m
e miring tikungan maksimum
9 m koe8sien gesekan maksimum
2 ke-epatan ren-ana (km3jam
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Rms + rms mm
0ata :
PI.Sta = nomor stasiun
d jarak P% ke P% yang lain (m
(ditetapkan (km3jam
∆ (diukur dari gambar (derajat
4 (ditetapkan (m
s panjang lengkung spiral (m
θs lihat tabel (derajat
;s (4 < p . tg = ∆ < k (m
>s (4 < p . -os = ∆ & 4 (m
- panjang lengkung -ir-le (m
e kemiringan melintang (superelevasi
360..2
2 x R
Ls s
π θ =
θs=1
2 x
Ls
2π R x360
∆? ∆ & #θs
x= Ls− Ls
3
40 R2
y= Ls
2
6 . R
k@ – 4 sin θ
p@ y – 4 (1 – -os θ
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;s B(4 < p@ . tan = ∆C < k@
>s ( R
+ P
¿
)cos
1
2∆
− R
- !,!1$$ . ∆? . 4
- < # s
Tiknan "I , -./.-
DP% 001
r 23 km3jam
d1 ##$,11 m
9maks !,1"
emaks ,E
Hitnan
4min #', m
4desain 1! m
smin ,'$ m
sdesain ! m
F *,$*
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DI ",*!1
$*,')1 m
y #,' m
7@ #$,* m
P@ !,)** m
;s 1!",$#) m
>s 1*,'*) m
- *",*1' m
1*",*1' m
7ontrol J #. ;s K7LLL
1*",*1'1 J # ( 1!",$#'
1*",*1'1 J #!),'1#") OK444
Tiknan "I 5 -./.-
DP% 6,
r 63 km3jam
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d# "'," m
9maks !,1))
emaks3k ),*E
Hitnan
4min ",)1! m
4desain #! m
smin 11,"" m
sdesain 1!! m
F 11,$*
DI 1',!'#
**,)!! m
y ),)) m
7@ $*,*"" m
P@ 1,)'" m
;s 1$$,!"" m
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>s 1',)** m
- ','") m
#','") m
7ontrol J #. ;s K7LLL
#','") J # ( 1$$,!""
#','") J #'',!))$!#' OK444
Tiknan "I 2 -/-
DP% 52
r 73 km3jam
d" $*,*$ m
9maks !,1"
emaks3k ,"E
Hitnan
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4min 1",)!$ m
4desain $'! m
smin #!,)) m
sdesain 1!! m
F ,*)'
DI 11,!)"
**,'*1 m
y ",$# m
7@ $*,*'# m
P@ !,'! m
;s 1$,'1) m
>s 1!,## m
- *#,)1$ m
#*#,)1$ m
7ontrol J #. ;s K7LLL
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#*#,)1$ J # (1$,'1)
#*#,)1$ J #*,)"#11$ OK444
Kontro panjan tanen (O8erappin)
"I, "I5 "I2
r "! r $! r )!
d1 ##$,1!* d# "',"$ d" $*,*"
;s 1!",$#) ;s 1$$,!"" ;s 1$,'1)
1 1*",*1' # #','") " #*#,)1$
1 1!,* OK '!
# 1*$,#1# OK 1$!
yarat (jarak antar tikungan d# – = (1<# M '! meter
(untuk r$! km3jam dan 1$! meter (untuk r)! km3jam.
1 "',"$ – =( 1*",*1'<#','") M'! meter.
1!,* m M '! meter. . . K7LL
6adi jarak antar tikungan P1 dan P# memiliki jarak 1!,* m.
# d" – = (#<"
# $*,*"– =( #','") <#*#,)1$ M 1$! meter.
1*$,#1# m M 1$! meter. . . K7LL
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6adi jarak antar tikungan P# dan P" memiliki jarak 1*$,#1# m.
b& "er'itnan -peree8asi
Rumus-rumus :
hn en . = . +
hm em . = . (+
hm? em . = . (+
a
en . Ls
en+em
7ontrol :
s – (#a 1!! – (# . ".") #*.# m M #! m..NK7
yarat Aman
emaks hn+hm '
B 1!!E J emaks tabel.....Aman4
yarat Oyaman (
en+em
Ls (+ J maks tabel.....Nyaman4
"er'itnan-peree8asi
Tiknan"I , -./.-
d1##$,1!*
m
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bI !,#$ m
+ # " m
r"!
km3jam
4 1! m
1*",*1'
m
s ! m
emaks ,!E
en "E
hn !,!' m
hm !,## m
a
1",*$#
m
7ontrol ##,11
eahitung ,#!E
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ma
hitung
!,!!*#
!!
7ontrol :
s & (#a M #! meter ! – (#. 1",*$# ##,11 M #! meter. . . OK4
9ik : emaks tabel untuk 4 desain (1! m dan r "! km3jam ,!E
maks tabel untuk r "! km3jam 1
100 !,!1
emaks hn+hm '
B 1!!E
0,087+0,225
3 ,#!E J
,!E . . .Aman4
en+em
Ls (+ 3 +5,250 (" !,!!*#!!
J!,!1. . .Nyaman4
Tiknan "I5 -./.-
d# "'," m
bI !,1$' m
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+ # " m
r $! km3jam
4 #! m
#','") m
s 1!! m
emaks ),*!E
en "E
hn !,!'* m
hm !,#1# m
a #*,*# m
7ontrol $!,'1) m
ea hitung ,!#E
ma hitung !,!!$#
7ontrol :
s & (#a M #! meter 1!! – (#. #*,*# $!,'1) M #! meter. . .
OK4
9ik : emaks tabel untuk 4 desain (#! m dan r $! km3jam ),*E
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maks tabel untuk r $! km3jam 1
120 !,!!'""
emaks hn+hm '
B 1!!E
0,089+0,2123 ,!# E J ),*
E . . .Aman4
en+em
Ls (+ 3 +5,02100 (" !,!!$#
J!,!!'"". . .Nyaman4
Tiknan "I2 -./.-
d" $*,*$ m
bI !,! m
+ # " m
r )! km3jam
4 $'! m
#*#,)1$ m
s 1!! m
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emaks ,"!E
en "E
hn !,!'' m
hm !,1)1 m
a ",")) m
7ontrol #*,#)' m
ea hitung $,1E
ma hitung !,!!$#"1
7ontrol :
s & (#a M #! meter 1!! – (#. ",")) #*,#)' M #! meter. . .
OK4
9ik : emaks tabel untuk 4 desain ($'! m dan r )! km3jam ,"E
maks tabel untuk r )! km3jam 1
160 !,!!)#
emaks hn+hm '
B 1!!E 0,088+0,616
3 $,1 E J ),*
E . . .Aman4
en+em
Ls (+ 3 +4 ,15
100 (" !,!!$#"1
J!,!!)#. . .Nyaman4
;& "er'itnan -tasionin
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0iketahui :
aka perhitungan tasioning :
7ontrol :
(d 1+d2+d3)−Sta PI 3
Sta PI 3 J " E. . . .K7LL
(224,11+387,35+479,94)−1069,24
1069,24 #,! E J "E . . .K7LL