Title page for ETD etd-10102005-131613


Type of Document Dissertation
Author Lien, Bon-Hsiang
URN etd-10102005-131613
Title Pressuremeter testing in miocene stiff clays
Degree PhD
Department Civil Engineering
Advisory Committee
Advisor Name Title
No Advisors Found
Keywords
  • Geology
  • Pressure Measurement
  • Clay
  • Stratigraphic Miocene
Date of Defense 1993-09-05
Availability restricted
Abstract

In geotechnical engineering, it has proven difficult to obtain reliable soil parameters for stiff clays. Laboratory testing results are often scattering due to the fissures and slickensides in these soils. Alternatively, in situ techniques offer a means to test the soils in place. This study focuses on in situ testing in Miocene stiff clays using an advanced nine strain arm self-boring pressuremeter (SBPM). This device was used to test the soils in both a self-boring and a simpler, non-boring mode (pre-bored or PBPM tests). The Miocene stiff clay was unique in that was sensitive and lacked of fissures and slickensides. The pressuremeter results could be compared to a range of other tests previously performed at the site.

It is concluded that the SBPM provides accurate values of modulus and strength. Minor soil disturbance was found to have little effect when it could be anticipated. The simpler PBPM tests were not successful because of disturbance caused by borehole preparation.

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