LONGITUDINAL PROFILE COMPLETION

Size: px

Start display at page:

Download "LONGITUDINAL PROFILE COMPLETION"

Robyn Burns
7 years ago
Views:

1 LONGITUDINAL PROFILE COMPLETION Course of the trench bottom determine using drawn cross-sections plot (refer to fig. 0630) according to the stationing direction: right-sided... dotted line left-sided... dashed line double-sided... dot-and-dashed line fig (longitudinal profile types of lines used for marking of the trench bottoms) drawing process (result in fig. 0660): determine trench bottom elevations (if there is no trench, use elevation of intersection of embankment slope with the original terrain) from the crosssections an example in fig L... left side in the direction of stationing P... right side in the direction of stationing D... trench bottom (only in the cut) or the intersection of embankment slope with the original terrain S... intersection of cut slope with the original terrain

0660): determine trench bottom elevations (if there is no trench, use elevation of intersection of embankment slope with the original terrain) from the crosssections an example in fig. 0640 L.

2 fig (determining of trench bottom elevations in the cut or in the intersections of embankment slopes with the original terrain from the cross-sections) draw the D points in locations of the cross-sections in the longitudinal profile (according to fig. 0640) an example in fig. 0650

cross-sections) draw the D points in locations of the cross-sections in

3 point... trench bottom elevation (only in the cut) point... elevation of intersection of embankment slope with the original terrain combination... the same elevation on both sides (trench bottom elevation = elevation of intersection of embankment slope with the original terrain) fig (drawing of points showing trench bottom elevations or elevations of intersections of embankment slopes with the original terrain) provisionally (green = by pencil ) connect separately points corresponding left and right side fig connect 2 consecutive points on the same side of the road by red colour (type of the line corresponds to

0650 (drawing of points showing trench bottom elevations or elevations of intersections of embankment slopes with the original terrain) provisionally (green

4 the left or right side according to fig. 0630) an example in fig both 2 outside points have the same elevation on both sides (left + right) of the road doublesided trench according to fig (otherwise not!!!) section between outside points + line is drawn in red only in the half of the section closer to the point (solve for left and right side separately fig. 0650) fig (longitudinal profile plotting trench bottom) Pipe culverts design in places complying following conditions: road crosses watercourse (maximum deviation from the centerline perpendicular is 30 an example in fig. 0090)

!!) section between outside points + line is drawn in red only in the half of the section closer to the point (solve for left and right side separately

5 one of the trench bottoms descends from both sides to one point (it must not occur in both trenches in one point at the same time!!!) refer to fig culvert diameter is designed according to its length and longitudinal gradient (refer to the table in fig. 0670) determine length and longitudinal gradient of the trench bottom using the corresponding cross-section (fig. 0671): between trench bottoms on both sides alternatively between trench bottom on one side and embankment slope base on the other side do not draw the culvert into the cross-section fig (table for determining the culver diameter) fig (example of inclined pipe culvert in corresponding cross-section)

0670) determine length and longitudinal gradient of the trench bottom using the corresponding cross-section (fig.

6 if the culvert longitudinal gradient is not within the interval 0,5 ~ 5,0 %, it is necessary to (for the purpose of the exercise) sink the culvert outlet on the suitable side draw it into the longitudinal profile (including the table) according to fig fig (longitudinal profile pipe culvert plotting) Guardrails design in sections meeting following conditions (simplified conditions used in the exercise):

7 embankment height hn 3 m (refer to exercise no. 5) determine from the longitudinal profile (for each side separately) draw it into the longitudinal profile by its location refer to the schema in fig (an example in fig. 0660) fig (longitudinal profile schemas for drawing of different road components) draw guardrails into the corresponding cross-sections (the 0,75 m extension of the crown on the guardrail side must be rearranged according to fig. 0691) guardrail height is considered to be 0,75 m fig (cross-section with guardrail in horizontal straight left side of embankment)

fig. 0690 (an example in fig. 0660) fig.

8 Paved trenches calculate sd in all sections between cross-sections (for left and right side separately) = longitudinal profile of trench bottom: s d (i) = ( h h ) ( St St ) i+ 1 d(i+ 1) i d(i) [%] sd(i)... longitudinal gradient of trench bottom between cross-sections no. i a i+1 Sti... cross-section stationing no. i ; [St] = km (rounding to 5 decimal places) hd(i)... trench bottom elevation (or elevation of the intersection of embankment slope with the original terrain) in cross-section no. i (copy from the cross-section); [hd] = m (rounding to 2 decimal places) paved trench is designed in locations where (it is assessed for left and right side separately): sd 0,3%; 0,5% sd 3%; 5%

i ; [St] = km (rounding to 5 decimal places) hd(i).

9 fig (longitudinal profile an example of drawing in the end part) draw it into the longitudinal profile according to its location refer to the schema in fig (examples in fig and fig. 0680)

10 schematically draw the paved trenches into the corresponding cross-sections according to fig fig (cross-section with paved trench and a drain) Superelevation schematically indicate in sections between points TP-PK and KP-PT (include corresponding value of cross slope p or p0 ) according to fig and fig PLAN COMPLETION Road gradient marker in all vertices of elevation polygon label and all details according to fig gradient marker arms schematically indicate the gradient direction! (indication in the brackets is the rounding curve tangent difference from gradient markers in the longitudinal profile)

value of cross slope p or p0 ) according to fig. 0250 and fig.

11 fig (part of the plan an example of plotting) Guardrails and paved trenches the symbol cannot be used for double-sided (fig. 0690) for guardrails use symbols according to fig for paved trenches use symbols according to fig plot according to fig fig (plan schemas for plotting of paved trenches)

0690) for guardrails use symbols according to fig.

12 Pipe culverts schemas for plotting of different types of culverts into the plan refer to fig and fig mark including the table the same as in the longitudinal profile an example in fig fig (plan schemas for drawing of culverts)

0740 mark including the table the same as in the longitudinal

13 fig (plan schemas for drawing of inclined pipe culvert) Pavement and roadway crown plot in constant distance on both sides from the road centerline (fig. 0090): the edge between hard and soft shoulder (at the distance a+v+c from the road centerline) the edge of roadway crown (at the distance a+v+c+e+0,25 m from the centerline, if there are guardrails, then a+v+c+e+1 m!!! fig. 0090, change of the width to the length is about 5 m according to fig. 0750) fig (plan showing changes of the roadway width)

0090): the edge between hard and soft shoulder (at the distance a+v+c from the road centerline) the edge of roadway crown (at

14 Earth construction draw (refer to fig and fig. 0710) based on points D and S according to the distance from the centerline from cross-sections (fig. 0640) apply the distances on the centerline perpendicular according to the principle in fig fig (plan process schema for earth construction edge plotting) connect consecutive points fig. 0760: D line shows trench bottom location (or the intersection of embankment slope with the original terrain) S line shows location of intersection of opposite cut slope with the original terrain (if the points does not exist in one of two consecutive cross-sections line is terminated in the half of the section by merging into the line made by D points)

0760 (plan process schema for earth construction edge plotting) connect consecutive points fig.

15 schematic indication of slope gradient direction of earth construction according to fig schematic indication of paved or unpaved trench according to fig fig (plan schemas for the cut and the embankment) fig (plan schemas for trenches)

0770 schematic indication of paved or unpaved trench according

16 Superelevation schematic indication in points TP, PK, KP and PT (include the corresponding values of cross slope p or p0 ) an example in fig and fig fig (an example of the whole plan)

Road Rehabilitation and Reconstruction Using AutoCAD Civil 3D

Road Rehabilitation and Reconstruction Using AutoCAD Civil 3D Contents Introduction... 3 Introduction to Corridor Targets... 3 Surface Targets... 4 Width and Offset Targets... 5 Elevation or Slope Targets...