Analysis And Design of Pavements in Submerged Condition

Abstract

Stagnation of road structures because of flooding or improper drainage conditions can cause huge expense for their rehabilitation and maintenance at present, design of flexible and rigid pavements is defined by an important empiricism phenomenon though it has been in practice from the evolution of art to science. By layered theory the flexible pavement is designed by assuming that there is an absence of discontinuities and the layers are infinite in a real practice. The olden design of Flexible pavement is depended on using California Bearing Ratio (CBR) values in 1970.Instead of Elastic modulus values, Resilient modulus values are fundamentally considered in the flexible pavement design. It is vital material property which is used to identify the unbound pavement materials. These resilient mean values are used to evaluate the stress and strain, material stiffness in a submerged condition. Stress and strain condition differs from initial condition of pavement and a period of submerged condition in sub grade and granular base layer of pavement. This analysis is carried out to evaluate the reaction on sub grade strength and its properties during pavement submergence period. Pavement analysis can be done through a software package called KENPAVE. In this software, the programs like KENLAYER, KENSLAB, LAYERINP, and SLABSINP are combined with addition of graphic programme. An existing pavement structure suggested by the Indian Roads Congress standard is analyzed and compared with its submerged condition. New pavement sections were designed using the material properties under submerged cases, and compared for stresses, strains, displacements, damage ratio, etc.