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Perhitungan Tikungan Lingkaran Penuh

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Perhitungan Tikungan Lingkaran Penuh
1.4. Desain Alinemen Horizontal
Perhitungan Tikungan Lingkaran Penuh
L = circular
Lc
i l length
l th from
f
point
i t
TC to point CT (m)
= ∆R
Ts = tangent
g Length
g from ppoint
TC to point IP (m)
= R tan(½
( ∆))
Es = offset distance from point
IP to point CC (m)
= R {sec(½ ∆) - 1}
Contoh dan Latihan
Modul IV
Halaman - 1/46
1.4. Desain Alinemen Horizontal
Perhitungan Tikungan Spiral- Lingkaran- Spiral
The general equations of spiral curve
from point TS to point SC are:
l2
θ = ---------2 R Ls
l5
x = l - ------------40 R2 Ls2
l3
y = ---------6 R Ls
Where:
l = curve length measured from
point TS to any point on the
spiral curve (m)
Ls = spiral curve length (m)
Modul IV
Halaman - 2/46
1.4. Desain Alinemen Horizontal
Perhitungan Tikungan Spiral Penuh
The equations used to
calculate the elements
of the full spiral curve
and the spiral-circlespiral
p
curve are the
same, except that:
∆c = 0
θs = ½ ∆
Ls = 2 θs R
Contoh dan Latihan
Modul IV
Halaman - 3/46
1.4. Desain Alinemen Horizontal
Kriteria Pemilihan Tipe Tikungan
ya
tidak
ya
tidak
ya
tid k
tidak
Latihan
Modul IV
Halaman - 4/46
1.4. Desain Alinemen Horizontal
Kriteria Desain Tikungan
Latihan
Modul IV
Halaman - 5/46
1.4. Desain Alinemen Horizontal
Modul IV
Halaman - 6/46
1.4. Desain Alinemen Horizontal
Modul IV
Halaman - 7/46
1.4. Desain Alinemen Horizontal
Gambar Tikungan – Lingkaran Penuh
Modul IV
Halaman - 8/46
1.4. Desain Alinemen Horizontal
Gambar Tikungan – Spiral
Modul IV
Halaman - 9/46
1.4. Desain Alinemen Horizontal
Diagram Superelevasi Sp-Lingkaran-Sp
Figure 44-18a
18a : Superelevation diagram of a typical spiral
spiral-circle-spiral
circle spiral curve
Modul IV
Halaman - 10/46
1.4. Desain Alinemen Horizontal
Diagram Superelevasi Spiral Penuh
Figure 44-18b
18b : Superelevation diagram of a typical full spiral curve
Modul IV
Halaman - 11/46
1.4. Desain Alinemen Horizontal
Diagram Superelevasi Lingkaran Penuh
Figure 44-18c
18c : Superelevation diagram of a typical full circle curve
Latihan
Modul IV
Halaman - 12/46
1.4. Desain Alinemen Horizontal
Contoh Proses Iterasi No.2/6
Ada
masalah
Dengan
g IP1 ?
Modul IV
Halaman - 13/46
1.4. Desain Alinemen Horizontal
Contoh Proses Iterasi No.2/6
Apa ini
lebih baik ?
Modul IV
Halaman - 14/46
1.4. Desain Alinemen Horizontal
Contoh Proses Iterasi No.2/6
Ada
Masalah dgn
IP5 dan IP6?
Modul IV
Halaman - 15/46
1.4. Desain Alinemen Horizontal
Contoh Proses Iterasi No.2/6
Apa ini
Lebih baik ?
Modul IV
Halaman - 16/46
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