Get Latest Civil Projects in your Email


A Study of the Effect of Length to Diameter Ratio on the Results of Pressuremeter Tests

The pressuremeter is one of the most commonly used devices in in-situ testing, because the interpretation method is relatively easy on the assumption that the pressuremeter is infinitely long. However, the effects of lenght-to-diameter ratio on test results have been questioned recently, and so this thesis explores the effects of length-to-diameter ratio on the results of pressuremeter tests in soils.

First, the finite element method is used to analyse numerically the effects of length-to-diameter ratio on self-boring pressuremeter test results, both in sand and in clay since it is impossible to solve the cavity expansion problem theoretically on the assumption that the length of the pressuremeter is finite. In the analysis of clay, the effects of length-to-diameter ratio on the shear modulus and the shear strength are emphasized. In the analysis of sand, the effects of the length-to-diameter ratio on friction angle are emphasized.

The finite element method is also used to analyse the effects of length to diameter ratio on full-displacement pressuremeter test in clay. The effects of lenght-to-diameter ratio on the rigidityindex, shear strength, shear modulus and initial horizontal stress are emphasized.

Finally, several calibration tests are performed to investigate the effects of length-to-diameter ratio on the limit press of a full-displacement pressuremeter in sand. Three values of length-to-diameter ratio (5, 10 or 20) are used to investigate the effects.
Source: Oxford University
Author: M. Yao

Download Project

For Free Civil Project Downloads:
Enter your email address:
( Its Free 100% )


Leave a Comment

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>