Download - Design of highway (Flexible pavement)
Buddha Institute of Technology
Project Guide:-Prof. ALAK ROY
Presented By :-1:- Raj Kumar Gupta2:- Sujoy Kumar Vidyanto3:- Vikash Singh4:- Shivakant5:- Rishabh Kumar Srivastava6:- Utkarsh Kumar Tripathi
Design of Highway(Flexible Pavement)
Contents: Introduction Site & Location Site plan Types of pavement Flexible pavement design Wheel load transfer Super elevation Camber Shoulder Krebs Surveying Testing Types of bitumen Drainage system Carriage way Road Environment Road design by IRC-37-2001 CBR test Flexible pavement construction Satallitemap of project Difference Advantages of flexible roads Disadvantages of flexible roads
IntroductionHIGHWAY is a term commanly used to refer a major roads intended for travel by the public between important distinations, such a cities. A hard smooth surface or layer that forms a road carriageway, airfield runway, vehicle park or other paved areas.
Site & Location
NH 28 (BIT to ITM)
Site Plan
Types Of Pavements
Flexible Pavement Design
Wheel Load Transfer
Super elevation
Super elevation Calculation
Where-E=rate of super elevationF=friction factorV=speed of vehicle (m/s)R=radios of curve (m)
Camber
IRC Values for Camber
Surface type Heavy rain Light rainConcrete/Bituminous
2 % 1.7 %
Gravel/WBM 3 % 2.5 %Earthen 4 % 3.0 %
Shoulder
Drainage System
Kerb
Types of Kerbs
Types of Kerbs Low or mountable kerbs:
Height of 10 cm above the pavement edge. With a slope which allows the vehicle to climb over easily
Semi-barrier type kerbs Height is 15 cm above the pavement edge. parking vehicles, but at emergency only.
Barrier type kerbs. Height of 20 cm above the pavement edge With a steep slope.
Submerged kerb. Provide lateral stability
Surveying L-SECTION X-SECTION LEVELLING
L&X Section
Testing Bitumen Testing Aggregate Testing Soil Testing
Bitumen Testing
Penetration test Ductility test
Penetration Test
Determining the Ductility Of Bitumen
Ductility Test
Aggregate Test Aggregate Impact Value Aggregate Abrasion Value
Aggregate Impact Value
- Passing through 12.5mm IS Sieve- Retention on 10mm IS Sieve – - Aggregate impact value
=
Aggregate Abrasion Value
Aggregate abrasion value
We found 10.56% Our abrasion value
in bituminous road should be less than 30%
Design EquationxAxDxF
Where-=The cumulative number of standard axles to be
catered for in the design in the terms of MSAA=Initial traffic in the year of completion of
construction in the terms of numbers of commercial vehicles per day
D= Lane distribution factorF=VDFn= design life in yearsr=Annual growth rate
Available DataA=1698r=0.075F=4.5D=0.75
Calculation of MSA =
= =29591798.91 SA =29.59 MSA
CBR Test
CBR CalculationCBR%=%
Where-X=Unit load on the piston (pressure)Y=Standard unit load (pressure) for well graded crushed stone.
DESIGN OF CRUST THICKNESS
According to IRC37-2001 for designed load 30msa &CBR value 5%-SG GSB (200mm)WMM (250mm)DMM (65mm)BC (40mm)Total =200+250+65+40=555mm
Flexible Pavement Construction
Base and Subgrade Preparation Pavement surface preparation Mix trasport Placement Compaction
Preparation of Sub Grade Preparation of sub grade could include
site clearence , grading, and composition process.
Preparation of sub base( Soiling)
Laying of boulder. Size of boulder 45 – 90 mm (according to
IRC-37-2001). Thickness of sub base 150 mm
( according to design).
Preparation of Base(Bearing)
Laying of boulder. Size of boulder 20-50 mm ( according to
IRC-37-2001). Thickness of sub base 175 mm
( according to design). Compaction. Sprinklimg of water.
Preparation of Surface Sprinking of Binding meterial ( bitumen). Laying the bituminous concrete mix
meterial at 170 to 190*C. Aggregate size 0 to 20 mm. Rolling of surfacing.
Difference Between Flexible and Rigid Pavement
FLEXIBLE PAVEMENT RIGID PAVEMENT
1. Load is transfer by grain to grain.2. Low strength.3. Low life Span.4. High maintenance cost.5. Rolling of surface is needed.6. Damaged by oils and
certain Chemicals.
1. Load transfer is not exists.2. High strength.3. Life span is more.4. Low Maintenance cost.5. Rolling of surface is not needed.6. No damage by oils and
greases.
Advantage of Flexible
1. Easily repair.2. Additional thickness added any
time.3. Smooth.4. Tolerates a great range of
temperature.
Disadvantages of Flexible
Loses some flexibility and cohesion with time.
Needs resurfacing sooner then PC concrete.
Not normally chosen where water is expected.
Thank You