Author(s):
J. Rehmet, H.M. Coyle
Publication Date
September 1969
Abstract
This report presents the results of a series of field tests conducted on several newly developed in-situ testing devices. The in-situ testing devices are to be used to measure static values of skin friction and point bearing during sampling operations with an auger or a core drilling rig. Measured values of skin friction and point bearing taken during sampling operations are compared with the values taken from tests on an 8-foot section of instrumented drill pipe. All tests are conducted at one test site. The soil at the test site is a highly plastic clay. Soil samples are taken during all phases of the test program.|A few dynamic tests are conducted at the test site using one of the in-situ devices which records simultaneous measurements of skin friction and point bearing. Data from the dynamic tests are used to evaluate friction and tip damping constants for the clay soil. The limited dynamic data indicate that soil damping does increase with depth and is a function of overburden pressure.|This study is preliminary in nature because the in-situ devices and testing procedures are in the development stage. Therefore, no definite conclusions are made concerning the application of test results. However, recommendations are made concerning the device and procedure which should be used for future large scale field test programs.
Report Number:
125-3
Link(s):
Document/Product
http://tti.tamu.edu/documents/125-3.pdf
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