1 / 94

Horizontal Alignment

Horizontal Alignment. TS4447 Highway Geometric Design. Horizontal Alignment. Minimum Radii Horizontal Curve Full Circle (FC)  Tugas 3 Spiral Circle Spiral (SCS)  Tugas 4 Spiral Spiral (SS)  Tugas 4 Sight Distance on Curve  Tugas 5 Stopping Sight Distance (SSD)

brian
Download Presentation

Horizontal Alignment

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Horizontal Alignment TS4447 Highway Geometric Design

  2. Horizontal Alignment • Minimum Radii • Horizontal Curve • Full Circle (FC)  Tugas 3 • Spiral Circle Spiral (SCS)  Tugas 4 • Spiral Spiral (SS)  Tugas 4 • Sight Distance on Curve  Tugas 5 • Stopping Sight Distance (SSD) • Passing Sight Distance (PSD) • Widening on Curve  Tugas 5 • Superelevation Diagram  Tugas 6 • Stationing  Tugas 6

  3. Design Classification Design Type & Class Design Speed Design Vehicles Cross Section R = V2/127(e+f) R’ << R FC / SCS / SS R’ << R Dij  Ti + Tj A B

  4. A B Sight Distance on Curve Widening on Curve Superelevation Diagram Stationing

  5. Rmin = V2 / 127 ( e + f ) R  minimum radii (m) V  design speed (kph) e  superelevation (%) f  side friction

  6. Superelevation

  7. PI CT PI TC CS SC TS PI ST SS ST TS Tiga Macam Lengkung Horisontal • Full Circle (FC) • Spiral-Circle-Spiral (SCS) • Spiral-Spiral (SS)

  8. Geometric Design … normally seeks to ensure uniformity of alignment and maximum levels of safety and comfort for drivers using the road, within given economic constraints. Compromise are inevitable to achieve an acceptable solution and not all objectives can be fully met. Often, however, it is possible to improve road safety implications of design features are considered at the design stage.

  9. TC CT

  10. Potongan Melintang Rencana Tipe Jalan : Kolektor Sekunder Kecepatan Rencana : 40 Kph Kendaraan Rencana : Single Unit (SU)

  11. Minimum Radii Not RequiredTransition Section[RSNI T-14-2004 p.31].

  12. Azimuth, Intersection Angle, distance between PI

  13. Panjang Bagian Lengkung Minimum[RSNI p.27 table.11]

  14. RFC Minimum Sesuai Syarat [RSNI p.27 table.11]

  15. Check dij Ti + Tj

  16. Azimuth, Intersection Angle, distance between PI

  17. Latihan • Pilih 2-3 PI yang bersebelahan, • Coba desain tikungan pada PI tersebut dengan jenis FC.

  18. Tugas 3 • Azimuth, D, distance between PI • Minimum radius • Curve type FC • Stopping Sight Distance • Widening on curve • Stationing • Superelevation diagram • AutoCAD drawing Dikumpulkan via Email, Minggu 23 Ags 09 (pk. 12:00) dan CDRW, Senin 24 Ags 09 (pk. 12:00) di TU Sipil

  19. PI CT PI TC CS SC TS PI ST SS ST TS Tiga Macam Lengkung Horisontal • Full Circle (FC) • Spiral-Circle-Spiral (SCS) • Spiral-Spiral (SS)

  20. FC  SCS

  21. TFC<TSCS

  22. FC vs SCS

  23. FC vs SCS

  24. CLOTHOID (Spiral) CURVE

  25. TRANSITION (Spiral) CURVE • To provide a natural, easy-to-follow path for drivers, where centrifugal force increase/decrease gradually. • To provide a convenient desirable arrangement for superelevation run-off. • To provide a flexible change in lane-width. • To enhanced the appearance of the highway, to avoid the noticeable breaks at the beginning and ending of circular curves

  26. 0% 0% 2% 2% 2% 2% 2% 2% Tangent Runout is the general term denoting the length of highway needed to accomplish the change in cross slope from a normal section to a section with the adverse cross slope removed, or vice-versa.

  27. 2% 2% 0% 0% 2% 2% 2% 2% Superelevation Runoff, is the general term denoting length of highway needed to accomplish the change in cross slope from a section with adverse crown removed to a fully superelevation section, or vice-versa.

  28. Superelevation Runoff TR menambah jarak antar TS !!! Tangent Runout

  29. Check dij Ti (+TR) + Tj (+ TR)

  30. Minimum Length of Transition Sections • Minimum Maneuver Time for Traveling on Transition Curve [RSNI T-14-2004 p.30]. LS = (Vr/3,6)x t Vr  design speed (km/h) t  running time (2 sec)

  31. Minimum Length of Transition Sections • Minimum Length of Superelevation Runoff [RSNI T-14-2004 p.30]. LS = W 1/D (ed + eNC) LS = W 1/D ed  AASHTO D relative slopes ratio (m/m) W  road width (m) eNC  normal cross fall (%) ed  design superelevation (%)

  32. Superelevation Runoff TR menambah jarak antar TS !!! Tangent Runout

  33. 2% 2% 2% 2% Full-Circle, Normal Cross-Fall Spiral-Circle-Spiral or Spiral-Spiral Reverse Cross-Fall or Superelevation

  34. FC min 

  35. Spiral-Circle-Spiral (SCS)

  36. Check dij Ti (+TR) + Tj (+ TR)

More Related