GEOTECHNICAL PROPERTIES OF WEATHERED SEDIMENTARY ROCKS

In the course of site investigation work for several large civil engineering projects in Singapore, laboratory tests such as unconfined compression test, point load test and slake durability test have been conducted on a large number of weathered sedimentary rock core samples. In addition, in-situ tests such as standard penetration test, pressuremeter test, plate load test and packer test were also performed at the sites. Based on this large data bank, a detailed study has been carried out to examine the geotechnical properties of highly to slightly weathered sedimentary rocks including sandstones, siltstones and shaley mudstones. Correlation between standard penetration resistance, point load strength and unconfined compressive strength have been proposed. It is noted that pressuremeter modulus can be employed to estimate settlement of piles socketed in weathered rock. On the other hand, packer tests do not give an accurate permeability coefficient of the rock mass. It is also found that rocks of very low strength have low slaking durability and excavations in such rocks have high risk of failure when subjected to repeated wetting and drying process. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Southeast Asian Society of Soil Engineering

    P.O. Box 2754
    Bangkok,   Thailand 
  • Authors:
    • Leung, C F
    • Radhakrishnan, R
  • Publication Date: 1990-6

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 29-48
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00609601
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jun 30 1991 12:00AM