Strength analysis of a partially-flooded pavement using falling weight deflectometer test before and after maintenance
- PDF / 1,764,948 Bytes
- 9 Pages / 595.32 x 841.92 pts (A4) Page_size
- 69 Downloads / 200 Views
International Journal of Pavement Research and Technology Journal homepage: www.springer.com/42947
Strength analysis of a partially-flooded pavement using falling weight deflectometer test before and after maintenance Md Habibullah Bhuyan*, Yaki Deng, Alexander Scheuermann School of Civil Engineering, The University of Queensland, QLD-4072, Australia Received 25 November 2019; received in revised form 18 August 2020; accepted 11 September 2020
Abstract
Frequent flooding and wet weather events are the challenges for managing road infrastructure. In this study, falling weight d eflectometer (FWD) equipment is employed to investigate the effect of moisture consequence of January 2011 flood at Queensland, Australia on a flooded road. The impac ts of the flood on the structural strength were obtained for the whole section as well as different layers individually. These two sets of data provide a clear picture of the road condition as sound, severe or warning before and after the maintenance of the road. Furthermore, the moisture con tent of the spotted road at field condition providing the structural stiffness was obtained with a correlation of FWD data. These analysis and investigations play an essential role in optimizing the maintenance method for the roads suffering from the flood. Keywords: FWD; Road performance; Flooding; Moisture; Maintenance
1. Introduction The performance of the road is one of the factors used to evaluate the level of road traffic system in a city. It has the advantage of an intuitive and clear response to the current state of the road and plays an important role in economic development. Road performance is affected by many different factors including weather condition, ground condition and traffic load. Among them, extreme weather condition is the most important factor and ingression of moisture in the road has the detrimental effect on the strength of pavement materials and subgrade soils [1-2]. About 80% of damage in pavement is responsible for the presence of excess pore water which subsequently affects structural layers [3]. Queensland state of Australia faced a severe flooding [4] forced thousands of people to leave home and at least 90 towns and more than 200 thousand people were affected. This flooding disaster led to a direct economic loss of about AU $2.38 billion and a decrease of AU $40 billion (around 2.9% of Australia's GDP in 2011) [5]. Sultana et al. [6] mentioned that the Brisbane City Council spent A $ 127 million in repairing the road infrastructure, including a relaying of 145,659 square meters of pavement in two years after the flood in Queensland, Australia. * Corresponding author E-mail addresses: [email protected] (M. H. Bhuyan); [email protected] (Y. Deng); [email protected] (A. Scheuermann). Peer review under responsibility of Chinese Society of Pavement Engineering.
Over the past few decades, many countries have come to realize the importance of road performance analysis. Pratico et al. [7] found that soil stabilization plays an important role for low-vo
Data Loading...
