Experiment No:-6
R.C.C.
SLAB CULVERTS WITH SPLAYED WING WALLS
Aim:-
To
draw the R.C.C. Slab culverts with splayed wing walls using AutoCAD software
Problem:
The
following are the particulars for a R.C.C. slab culvert with splayed wing wall.
Natural
drain
Flows
perpendicular to the centre line of roadway
Bed
width - 2500mm
Bed
level - +80.00m
Ground
level - +80.50m
Side
slop - 1:1
Embankment
:Road embankment
Top
width - 5300mm
Top
level - +82.7m
side
slope - 1:1
Distance
between the inner face of abutment -2500mm
Deck
slab - 250mm
Thickness
of R.C.C. slab - +82.70m
Bearing
on abutment - 450mm
Size
of cement concrete bed block -450x200mm
Length
of bed block - 5300mm
Abutment:
Abutment with R.R. masonry in cm 1:5
top
width - 600mm
Top
level -82.45m
Bottom
level - +79.50
External
side vertical and earth side battered Wing wall: Wing wall with R.R. masonry in
cm1:5 wing wall are splayed at 450 with abutment
Top
width 500mm
Same
slope as for embankment to the top of wall from
+82.7m
to +81.00m
Bottom
level +79.50m
Battered
at earth side
Return
wall
Return
wall with R.R. masonry in cm 1:5
Top
width - 500cm
Top
level - +81.00m
Bottom
level - +79.50m
Length
parallel to the embankment - 2250mm
Foundation
for walls:
Foundations
in C.C. 1:4:8
Offset
300mm provided around all walls
Bottom
level for abutment - +78.90
Bottom
level for other walls - +79.20m
Clear
width of roadway between kerb – 4000m
Width
of Kerb - 200mm
Height
of kerb above slab - 300mm
Road
level at crown - +82.80
Parapet
walls:
Parapet
walls with R.R. masonry in cm 1:4
Width
of wall - 450mm
Height
of wall - 750mm
Length
of wall - 3700mm
Thickness
of cement concrete coping - 200mm
Talus
or bed pitching and revetment along sides Bed under the culvert and for
sufficient length towards the upstream and down stream sides and also the sides
of the drain are pitched with dry ribble 300 thick.
Wearing
coat:
Wearing
coat with bituminous surfacing for an average thickness of 100mm over the deck
slab and over a course with rubble of thickness 250mm in the remaining portion.
Guard
stones:
Size
of stone - 250mm x250mm
Height
of stone - 450mm
Spacing
of stone - 2000mm c/c
Any
more data required may be assumed suitably .
Draw
the following view to a suitable scale
1.
Half plan at top and half at foundation level
2.
Half sectional elevation along the centre line of road and half front
elevation.
3.
cross section along the centre line of drain
To
find out sections of abutment , wing wall and return well.
Abutment
Top
width - 600
Top
level - +82.45m
Bottom
level - +79.50m
Bottom
width - 0.4 x h - 0.4(82.45 -79.5)- 1180m - say 1300mm
Wing
wall:
Section
of wing wall is same as abutment section at the abutment side (at +82.7 m level)
and the sectionat the other side (at + 81.00m level) may be found out as.
Top
width -500mm
Top
level at abutment side - +82.7m
Top
level at other side - +81.00m
Bottom
level - +79.50m
Minimum
height of wing wall - (81.00 – 79.50m- 1.5m
Bottom
width at +81.00 level - 0.4(81.00-79.50)- 600mm – say 700mm
Return
wall:
Section
of return wall is same as the section of wing wall of +81.00m level.
Procedure:
1.
switch on the computer
2.
Open Auto CAD 2014
3.
Setting units
(
ii) set the unit as decimal & millimeter
4.
Setting limits
5.
Zoom – All
6.
Using Line command R.C.C. slab culvert withsplayed wing wall are drawn.
7.
using hatch command where our necessary
8.
Dotted lines are drawn using line type.
Result:
Thus
the R.C.C. slab culvert with splayed wing wall.
are
drawn using Auto CAD 2014 software
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