1.4. desain alinemen horizontal perhitungan tikungan ... · modul iv halaman - 1/46 contoh dan...
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1.4. Desain Alinemen Horizontal
Perhitungan Tikungan Lingkaran PenuhL i l l th f i tLc = circular length from point
TC to point CT (m)
= ∆ R= ∆ R
Ts = tangent Length from pointg g pTC to point IP (m)
= R tan(½ ∆)( )
Es = offset distance from pointIP to point CC (m)IP to point CC (m)
= R {sec(½ ∆) - 1}
Modul IV Halaman - 1/46Contoh dan Latihan
1.4. Desain Alinemen Horizontal
Perhitungan Tikungan Spiral- Lingkaran- SpiralThe general equations of spiral curve from point TS to point SC are:
l 2
θ = ----------2 R Ls
l 5
x = l - -------------40 R2 Ls2
l 3
y = ----------6 R Ls
Where: l = curve length measured from
point TS to any point on thespiral curve (m)
Modul IV Halaman - 2/46
Ls = spiral curve length (m)
1.4. Desain Alinemen Horizontal
Perhitungan Tikungan Spiral PenuhThe equations used to calculate the elements of the full spiral curveof the full spiral curve and the spiral-circle-spiral curve are the psame, except that:
∆c = 0∆c = 0
θs = ½ ∆
Ls = 2 θs R
Modul IV Halaman - 3/46Contoh dan Latihan
1.4. Desain Alinemen Horizontal
Kriteria Pemilihan Tipe Tikungan
ya
tidakya
tidakya
tidak
tid ktidak
Modul IV Halaman - 4/46
Latihan
1.4. Desain Alinemen Horizontal
Diagram Superelevasi Sp-Lingkaran-Sp
Figure 4-18a : Superelevation diagram of a typical spiral-circle-spiral curve
Modul IV Halaman - 10/46
Figure 4 18a : Superelevation diagram of a typical spiral circle spiral curve
1.4. Desain Alinemen Horizontal
Diagram Superelevasi Spiral Penuh
Figure 4-18b : Superelevation diagram of a typical full spiral curve
Modul IV Halaman - 11/46
Figure 4 18b : Superelevation diagram of a typical full spiral curve
1.4. Desain Alinemen Horizontal
Diagram Superelevasi Lingkaran Penuh
Figure 4-18c : Superelevation diagram of a typical full circle curve
Modul IV Halaman - 12/46
Figure 4 18c : Superelevation diagram of a typical full circle curve
Latihan
1.4. Desain Alinemen Horizontal
Contoh Proses Iterasi No.2/6
Adamasalah Dengan IP1 ?g 1
Modul IV Halaman - 13/46
1.4. Desain Alinemen Horizontal
Contoh Proses Iterasi No.2/6
Apa inilebih baik ?
Modul IV Halaman - 14/46
1.4. Desain Alinemen Horizontal
Contoh Proses Iterasi No.2/6
AdaAdaMasalah dgnIP5 dan IP6?
Modul IV Halaman - 15/46