Stabilisation of a soft fill slope by compacted rockfill – an example of good practice

Slobodan B. Mickovski, Martyn J. Smith

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Remediation was designed for a marginally stable fill slope comprising up to 5 m loose cohesive fill in a residential area adjacent to a deep valley. Excessive ground settlements around a sewage pumping station (SPS) and a tension crack in the vicinity of residential houses in an area near Glasgow were linked to possible burst utilities and gradual washout of fines in the fill. Desk study and ground investigations were carried out to determine the site history and geological setting. Remedial options were considered. In light of confined site space and availability of materials, crushed compacted rock fill was considered the best option for replacement of the soft fill. Topsoil [150mm] was used to cover the rockfill and promote vegetation growth. The advantages of the rockfill over compacted cohesive fill include ease of construction, performance and suitability. Effective drainage including in-slope and contour channel drainage were designed to prevent build-up of pore water pressures in the slope beneath topsoil. Construction sequence including excavation and preparation of temporary cut, installation of drainage layer, deposition and compaction of rockfill material in layers, deposition and seeding of the topsoil layer, construction of permanent surface drainage system and maintenance access was also designed.

Original languageEnglish
Title of host publicationProceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering: The Academia and Practice of Geotechnical Engineering
EditorsMamdouh Hamza, Marawan Shahien, Yasser El-Mossallamy
PublisherIOS Press
Number of pages4
ISBN (Print)9781607500315
Publication statusPublished - 2009
Externally publishedYes
Event17th International Conference on Soil Mechanics and Geotechnical Engineering - Alexandria, Egypt
Duration: 5 Oct 20099 Oct 2009


Conference17th International Conference on Soil Mechanics and Geotechnical Engineering
Abbreviated titleICSMGE 2009


  • rockfill
  • slope stability
  • stabilisation
  • remediation
  • shear strength
  • drainage
  • eco-engineering

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology


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