A Model for Pavement Characteristic Deflection for Rural Roads in Himachal Pradesh

Aakash Gupta,Ashok Kumar Gupta,Civil Engineering Department, Jaypee University Of Information Technology, Solan, India, ,Ashish Kumar,Civil Engineering Department, Jaypee University Of Information Technology, Solan, India

doi:10.35940/ijeat.c5265.029320

Abstract

Structural Evaluation of pavements is essential to assess the structural strength of different layers of pavement. It also helps in determining the remaining life of a pavement and the thickness of overlay required. Surface Deflection is the structural response that is easy to measure and hence, commonly used parameter in structural evaluation. In the present study, an attempt has been made to develop a relationship between surface deflection and various structural parameters of pavements selected on low volume flexible rural roads in Himachal Pradesh. Benkelman Beam has been used to determine characteristic deflection on selected 12 rural road stretches in Shimla and Solan district of Himachal Pradesh. Because the conduction of Benkelman Beam Deflection (BBD) test is costly and difficult to carry out in the region of Himachal Pradesh due to hilly and narrow rural roads leading to disruption of traffic, hence, models have been developed to predict surface deflection value using Soaked CBR, Un-soaked CBR, Average Annual Daily Traffic (AADT) and Age of pavement from last overlay (in years). Another model has also been developed to estimate surface deflection using K-value, AADT and age of pavement. Multiple models have been developed using linear regression model. The various developed models have been studied, compared and best model is suggested supporting better coefficient of determination value and root mean square error (RMSE).

Highlights

Pavements are the main asset of highways which forms the backbone of the economy of any country
The average annual daily traffic (AADT) of 940 is maximum on RR3 followed by RR5 with an Annual Daily Traffic (AADT) of 713 (Fig. 9), the traffic volume on RR5 has significant contribution to the pavement deflection value of 1.8 mm
The model developed in Eq 1 is found to be better than model developed in Eq 2 depending upon better Root Mean Squared Error (RMSE) value of 0.19 as compared to 0.21 of Eq 2

Summary

Introduction

Pavements are the main asset of highways which forms the backbone of the economy of any country. The performance of pavements needs to be monitored regularly to meet the service life expectancy corresponding to the intensity of traffic and prevailing environmental conditions. The proper pavement maintenance strategies lead to better economic returns. The pavement performance can be ascertained by functional and structural evaluation of pavements. Structural evaluation can be of two types, Destructive type and Non-Destructive type. Non-destructive technique has been used to evaluate the surface characteristic deflection of selected flexible rural road stretch using Benkelman Beam. The study has been conducted on the rural roads of Himachal Pradesh which plays vital role in the development

Objectives

Methods

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Conclusion