Limit State Box Culvert Design IRC:6-1966
Description
Standard IRC:6-1966
1.0 Design Data
1.1 Dimension Detail
No of cells
Clear Span
Clear Height (at outer edge)
Clear Height (at median location)
Width of road at top
Width of Box
Ht of fill (W.C / P.C.C / pavement layers) over the top slab
Thickness of top slab
Thickness of bottom slab
Thickness of external vertical wall
Size of haunch
Width of Crash barrier
Distance of edge of crash barrier from edge of box
Height of surcharge
Safe Bearing Capacity of the soil
Permissible Settlement
1.2 Material Properties
Density of concrete
Density of soil
Density of wearing coat
Density of Profile corrective course
Coefficient of active earth pressure
Angle of internal friction (in degree)
1.3 Design Parameters
Grade of Concrete
Clear Cover for earth face structural component
Clear Cover for inside face structural component
Clear Cover for bottom slab
Permissible direct comp. strength of Concrete (scc)
Permissible flexural comp. strength of Concrete (scb)
Permissible tensile strength of Concrete ( sct )
Permissible tensile strength of Steel ( sst )
Design Costants:
Base Projection
2.0 Load Calculations for the Box Structure
2.1 Dead Load
Self weight of the structure has been calculated directly in STAAD file by the comment "SELFWEIGHT -1".
2.2 Super Imposed Dead Load
2.2.1 Top Slab
Wearing coat thickness
Ht of fill (Thickness of W.C / P.C.C / pavement layers)
Load (UDL) on top slab = 0.065*22
Wt of Crash barrier per meter
Total UDL load due to S.I Dead Load
Height of soil on projected portion of base slab
Wt of soil on the projected portion of base slab
2.3 Earth Pressure
Thickness of top slab
Height of top haunch
Clear height between top & bottom slab
Height of bottom haunch
Thickness of bottom slab
2.4 Live Load Surcharge
Equivalent height
Uniform Intensity of loading = 0.5 * 1.2 * 20
2.5 Braking Load
Carriageway Live Load
Width of the box
Braking Load = 0.2 * 400 / 12
2.6 Additional pressure on edge 1m strip due to eccentricity of Live Load
Live Load
Width of culvert (parallel to traffic direction)
Width of culvert (perpendicular to traffic direction)
Distance of CG of load from outer edge of box culvert
Transverse Moment
Section Modulus of box in transverse direction
Upward UDL on edge 1m strip
2.2.2 Bottom Slab
Thickness of earth fill
Load (UDL) on bottom slab = 0.3 * 20
Calculation Reference
Limit State Design
Box Culvert Design
IRC:6-1966
Calculation Preview
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Submitted On:
21 Dec 2017
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