REKAYASA JALAN 1 sem 5
REKAYASA JALAN 1
SEMESTER 5
PERBEDAAN JALAN
PERKOTAAN DAN JALAN
ANTAR KOTA
JALAN PERKOTAAN
JALAN ANTAR KOTA
KLASIFIKASI JALAN
KLASIFIKASI MENURUT FUNGSI
JALAN
ARTERI PRIMER
V TINGGI, JARAK
JAUH
AKSES MASUK
DIBATASI
LOKAL
V RENDAH, JARAK
DEKAT
AKSES MASUK TAK
DIBATASI
KOLEKTOR
V SEDANG, JARAK
SEDANG
AKSES MASUK
DIBATASI
KLASIFIKASI MENURUT KELAS JALAN
FUNGSI
KELAS
MST [ton]
ARTERI
I
>10
II
10
III A
8
III B
8
III C
8
KOLEKTOR
MUATAN SUMBU TERBERAT
KLASIFIKASI MENURUT MEDAN
JALAN
JENIS MEDAN
NOTASI
KEMIRINGAN
MEDAN [%]
DATAR
D
50.000
4-6
0,9 -1
30.000 – 50.000
6–8
0,8 – 1
10.000 – 30.000
6–8
0,8 – 1
5.000 – 10.000
8 – 10
0,6 – 0,8
1.000 – 5.000
10 – 12
0,6 – 0,8
< 1.000
12 – 16
< 0,6
KECEPATAN RENCANA
FUNGSI
KECEPATAN RENCANA [km/jam]
JALAN
DATAR
BUKIT
GUNUNG
ARTERI
70 - 120
60 -80
40 – 70
KOLEKTOR
60 - 90
50 -60
30 – 50
LOKAL
40 - 70
30 -50
20 – 30
DAERAH YG SULIT, NILAI DI TABEL BISA DITURUNKAN 20
km/jam
BAGIAN-BAGIAN JALAN
x
d
c
b
Ruang manfaat jalan
(Rumaja)
= Ruang milik jalan
(Rumija)
=
5
m
a
b
1,5 m
c
d
Ruang pengawasan jalan
(Ruwasja)
= Bangunan
=
a = jalur lalu lintas
d = ambang
pengaman
b = bahu jalan
x = b+a+b =
jalan
SJA DARI ASbadan
JALAN,
ARTERI 20 M, KOLEKTOR 15 M, LOKAL 10 M
c = saluran tepi
CV
CV
2/2 D
2 LAJUR – 2 ARAH DG
MEDIAN
CV
2/2 UD
2 LAJUR – 2 ARAH TANPA
MEDIAN
CV
CV
CV
4/2 D
4 LAJUR – 2 ARAH DG
MEDIAN
4/2 UD
4 LAJUR – 2 ARAH TANPA
MEDIAN
CV
2/1 UD
2 LAJUR – 1 ARAH TANPA
MEDIAN
ALINEMEN HORIZONTAL
PANJANG MAKSIMUM BAGIAN LURUS
T SEPARUH Vr
PANJANG KRITIS
BILA V > SEPARUH Vr DAN T < 1 MENIT
Vertical Alignment
• Objective:
– Determine elevation to ensure
• Proper drainage
• Acceptable level of safety
• Primary challenge
– Transition between two grades
– Vertical curves
Sag Vertical Curve
G1
G2
Crest Vertical Curve
G1
G2
Vertical Curve
Fundamentals
• Parabolic function
– Constant rate of change of slope
– Implies equal curve tangents
2
y ax bx c
• y is the roadway elevation x stations
(or feet) from the beginning of the
curve
Vertical Curve
Fundamentals
PVI
G1
PVC
δ
G2
PVT
L/2
L
x
2
y ax bx c
Choose Either:
• G1, G2 in decimal form, L in feet
• G1, G2 in percent, L in stations
Choose Either:
• G1, G2 in decimal form, L in feet
• G1, G2 in percent, L in stations
Relationships
At the PVC : x 0 and Y c
dY
b G1
dx
At the PVC : x 0 and
d 2Y
G2 G1
G2 G1
Anywhere :
2a
a
2
dx
L
2L
G1
PVC
PVI
L/2
L
x
δ
G2
PVT
Example
A 400 ft. equal tangent crest vertical curve has a PVC station of 100+00 at 59
ft. elevation. The initial grade is 2.0 percent and the final grade is -4.5
percent. Determine the elevation and stationing of PVI, PVT, and the high
point of the curve.
PVI
.0%
2
=
G1
PVT
G=
2
PVC: STA 100+00
EL 59 ft.
- 4.
5%
PVI
.0%
2
=
G1
PVC: STA 100+00
EL 59 ft.
PVT
G=
2
-4.5
%
•G1, G2 in percent
•L in feet
Other Properties
G1
x
PVT
PVC
Y
A G1 G2
A 2
Y
x
200 L
Ym
G2
PVI
AL
Ym
800
Yf
AL
Yf
200
SEMESTER 5
PERBEDAAN JALAN
PERKOTAAN DAN JALAN
ANTAR KOTA
JALAN PERKOTAAN
JALAN ANTAR KOTA
KLASIFIKASI JALAN
KLASIFIKASI MENURUT FUNGSI
JALAN
ARTERI PRIMER
V TINGGI, JARAK
JAUH
AKSES MASUK
DIBATASI
LOKAL
V RENDAH, JARAK
DEKAT
AKSES MASUK TAK
DIBATASI
KOLEKTOR
V SEDANG, JARAK
SEDANG
AKSES MASUK
DIBATASI
KLASIFIKASI MENURUT KELAS JALAN
FUNGSI
KELAS
MST [ton]
ARTERI
I
>10
II
10
III A
8
III B
8
III C
8
KOLEKTOR
MUATAN SUMBU TERBERAT
KLASIFIKASI MENURUT MEDAN
JALAN
JENIS MEDAN
NOTASI
KEMIRINGAN
MEDAN [%]
DATAR
D
50.000
4-6
0,9 -1
30.000 – 50.000
6–8
0,8 – 1
10.000 – 30.000
6–8
0,8 – 1
5.000 – 10.000
8 – 10
0,6 – 0,8
1.000 – 5.000
10 – 12
0,6 – 0,8
< 1.000
12 – 16
< 0,6
KECEPATAN RENCANA
FUNGSI
KECEPATAN RENCANA [km/jam]
JALAN
DATAR
BUKIT
GUNUNG
ARTERI
70 - 120
60 -80
40 – 70
KOLEKTOR
60 - 90
50 -60
30 – 50
LOKAL
40 - 70
30 -50
20 – 30
DAERAH YG SULIT, NILAI DI TABEL BISA DITURUNKAN 20
km/jam
BAGIAN-BAGIAN JALAN
x
d
c
b
Ruang manfaat jalan
(Rumaja)
= Ruang milik jalan
(Rumija)
=
5
m
a
b
1,5 m
c
d
Ruang pengawasan jalan
(Ruwasja)
= Bangunan
=
a = jalur lalu lintas
d = ambang
pengaman
b = bahu jalan
x = b+a+b =
jalan
SJA DARI ASbadan
JALAN,
ARTERI 20 M, KOLEKTOR 15 M, LOKAL 10 M
c = saluran tepi
CV
CV
2/2 D
2 LAJUR – 2 ARAH DG
MEDIAN
CV
2/2 UD
2 LAJUR – 2 ARAH TANPA
MEDIAN
CV
CV
CV
4/2 D
4 LAJUR – 2 ARAH DG
MEDIAN
4/2 UD
4 LAJUR – 2 ARAH TANPA
MEDIAN
CV
2/1 UD
2 LAJUR – 1 ARAH TANPA
MEDIAN
ALINEMEN HORIZONTAL
PANJANG MAKSIMUM BAGIAN LURUS
T SEPARUH Vr
PANJANG KRITIS
BILA V > SEPARUH Vr DAN T < 1 MENIT
Vertical Alignment
• Objective:
– Determine elevation to ensure
• Proper drainage
• Acceptable level of safety
• Primary challenge
– Transition between two grades
– Vertical curves
Sag Vertical Curve
G1
G2
Crest Vertical Curve
G1
G2
Vertical Curve
Fundamentals
• Parabolic function
– Constant rate of change of slope
– Implies equal curve tangents
2
y ax bx c
• y is the roadway elevation x stations
(or feet) from the beginning of the
curve
Vertical Curve
Fundamentals
PVI
G1
PVC
δ
G2
PVT
L/2
L
x
2
y ax bx c
Choose Either:
• G1, G2 in decimal form, L in feet
• G1, G2 in percent, L in stations
Choose Either:
• G1, G2 in decimal form, L in feet
• G1, G2 in percent, L in stations
Relationships
At the PVC : x 0 and Y c
dY
b G1
dx
At the PVC : x 0 and
d 2Y
G2 G1
G2 G1
Anywhere :
2a
a
2
dx
L
2L
G1
PVC
PVI
L/2
L
x
δ
G2
PVT
Example
A 400 ft. equal tangent crest vertical curve has a PVC station of 100+00 at 59
ft. elevation. The initial grade is 2.0 percent and the final grade is -4.5
percent. Determine the elevation and stationing of PVI, PVT, and the high
point of the curve.
PVI
.0%
2
=
G1
PVT
G=
2
PVC: STA 100+00
EL 59 ft.
- 4.
5%
PVI
.0%
2
=
G1
PVC: STA 100+00
EL 59 ft.
PVT
G=
2
-4.5
%
•G1, G2 in percent
•L in feet
Other Properties
G1
x
PVT
PVC
Y
A G1 G2
A 2
Y
x
200 L
Ym
G2
PVI
AL
Ym
800
Yf
AL
Yf
200