Dynamic stress study in pavement subgrade under a major highway in Hong Kong

Gordon L M Leung, Zhen Leng, Alan W G Wong

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


Flexible pavements are relatively thick in Hong Kong. Their thicknesses are generally designed to be at least 300 mm, generally due to high traffic volume. The design is based on the fatigue failure concept of the main structural layer (i.e. roadbase) after a prolonged number of traffic passages and, in turn, it is highly related to the stress levels being experienced in the pavement layers, including the subgrade. This paper presents the data collected on the dynamic stresses of the subgrade layer by soil pressure gauges under a major highway in Hong Kong. The results illustrate that the vertical stresses are in the range of 0.5 to 5kPa. These correspond well to the theoretical analysis results obtained by the software mePADs, by using the typical properties of the pavement layers. Subsequently, horizontal stresses at the bottom of the roadbase were also estimated. These fundamental findings provide an important yardstick for the review of design and analysis for fatigue life of flexible pavements in Hong Kong.
Original languageEnglish
Title of host publicationPavement Materials, Structures, and Performance - Selected Papers from the Proceedings of the 2014 GeoShanghai International Congress
PublisherAmerican Society of Civil Engineers (ASCE)
Number of pages11
Edition239 GSP
ISBN (Print)9780784413418
Publication statusPublished - 1 Jan 2014
Event2014 GeoShanghai International Congress: Pavement Materials, Structures, and Performance - Shanghai, China
Duration: 26 May 201428 May 2014


Conference2014 GeoShanghai International Congress: Pavement Materials, Structures, and Performance

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Building and Construction
  • Architecture

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