ROAD SUBMERGENCE DURING FLOODING AND ITS EFFECT ON SUBGRADE STRENGTH

Authors

  • Abdul Naser Abdul Ghani
  • Nur Izyan Roslan
  • Ahmad Hilmy Abdul Hamid

Keywords:

Flooding, Road Sub-grade, Pavement

Abstract

Deterioration of road structural integrity because of flooding may cause huge expenditure for
rehabilitation and maintenance of roadway. In principle, the design of pavement structure is based on the
strength of compacted soil known as the subgrade or road foundation. Therefore, subgrade is a significant part of
the road structural system. When roads are inundated for a long time or repeatedly, the materials in each layer of
road structure become saturated, and the original condition of subgrade soils will be compromised. This study
investigated the effect on sub-grade strength and properties due to road submergence period and repeated
submergence of the road structural systems. Two types of soil that are normally used as the embankment
material in road construction, which can be categorized as cohesive and cohesionless materials, were used in this
study. California Bearing Ratio (CBR) test and consolidation settlement test were carried out on vari.ous
categories of inundation and loading conditions including repeated inundation. The findings indicated that the
strength of subgrade soil further decrease when they are inundated for a longer period. Similarly, consolidation
test also shows that a quick and higher settlement could occur when the soil is inundated for a longer period.
These findings are useful for road design and maintenance strategies of flood affected road links

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Published

2021-11-21

How to Cite

Abdul Naser Abdul Ghani, Nur Izyan Roslan, & Ahmad Hilmy Abdul Hamid. (2021). ROAD SUBMERGENCE DURING FLOODING AND ITS EFFECT ON SUBGRADE STRENGTH. GEOMATE Journal, 10(21), 1848–1853. Retrieved from https://geomatejournal.com/geomate/article/view/2042

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