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NCE 2102 –Fundamentals of SurveyingEngr. Franz Alexis B. Juanico1stsemester 2019 - 2020U n i v e r s i t y o f t h e E a s t –M a n i l a C o l l e g e o f E n g i n e e r i n gC i v i l E n g i n e e r i n g D e p a r t m e n tHorizontal Curves
Route Surveying•Supplies necessary data o determinealignment,grading, andearthworkquantitiesfor the design of various engineering projectssuch as roads, railroads, pipelines and utilities.•A survey for determining the route for a proposed project in orderto acquire a Right-of-Way, servitude or easement from the propertyowner being crossed.
Horizontal Curves•Provides a transition between two straight lines of a roadway, also called asTangents, when a direct point of intersection is not feasible.•To reduce speed of vehiclesDesign Considerations•Speed Limit in Highways•Location of Obstructions•Degree of Curve•Radius of Curve
Simple CurvesElements of a Simple Curve•Backward and Forward Tangents•Point of Curvature (PC)•Point of Tangency (PT)•Point of Intersection (PI)•Radius of the Curve (R)•Angle of Intersection (I)•Tangent Distance (T)•Chord Distance (C)•Middle Ordinate (M)•External Distance (E)•Degree of Curve (D)•Length of Curve (L)RRTTC/2C/2L/2L/2MEPCPTPIIII/2
Elements of a Simple Curve•Tangent Distance (T)•Chord Distance (C)•Middle Ordinate (M)RRTTC/2C/2L/2L/2MEPCPTPIIII/2
Elements of a Simple Curve•External Distance (E)•Length of Curve (L)RRTTC/2C/2L/2L/2MEPCPTPIIII/2