ABSTRACT

The main principle of our project is to study the existing state highway and design of two

lane flexible pavement by considering the traffic volume at Pragnapur to Bhongir road.

The present road is insufficient for traffic which causes severe disturbance. In order to

facilitate easy transportation we require to widen the existing pavement.

The sequential step involved in the project are, Initially traffic volume study is conducted

to determine the passage of number of vehicles per day and to determine the wheel load,

based on the analysis of traffic volume the road widening technique is applied and then

survey the road by theodolite surveying and elevations and depressions are evaluated.

In the second phase the soil test is conducted to determine the soil properties like CBR

test is conducted for determining the soil bearing capacity.

In the third phase pavement thickness is determined for the design of widening pavement.

The tests are conducted for this project are like soil test, abrasion test, CBR test, bitumen

test, etc.

The codes referred for the design of pavement are IRC:37-2001, IRC:73-2007

CHAPTER 1

INTRODUCTION

Flexible pavements will transmit wheel load stresses to the lower layers by grain-to-

grain transfer through the points of contact in the granular structure .

Traffic volume studies are conducted to determine the number, movements, and

classifications of roadway vehicles at a given location. These data can help identify

critical flow time periods, determine the influence of large vehicles or pedestrians on

vehicular traffic flow, or document traffic volume trends. The length of the sampling

period depends on the type of count being taken and the intended use of the data

recorded. For example, an intersection count may be conducted during the peak flow

period. If so, manual count with 30-minute intervals could be used to obtain the traffic

volume data.

CBR test method is used to evaluate the potential strength of subgrade, subbase, and base

course materials, including recycled materials for use in the design of road and airfield

pavements. The CBR value obtained in this test forms an integral part of several flexible

pavement design methods.

CHAPTER 2

STUDY AREA

BhongirLatitude:  17.5108°NLongitude:78.8889°E

CHAPTER 3

LITERATURE REVIEW

Introduction to Transportation Engineering

Written By: Tom V. Mathew and K V Krishna Rao

IRC method of design of flexible pavements:

Overview:

Indian roads congress has specified the design procedures for flexible

pavements based on CBR values. The Pavement designs given in the previous

edition IRC:37-1984 were applicable to design traffic upto only 30 million

standard axles (msa). The earlier code is empirical in nature which has limitations

regarding applicability and extrapolation. This guidelines follows analytical

designs and developed new set of designs up to 150 msa.