Masters Theses


"Previous investigations concerned with disturbance of soft clay by driving displacement piles are summarized. The initiation of excess pore water pressures due to pile driving, and mechanisms of load transfer are also described, along with the applicapability of model pile testing in analysis of the various phenomena. Load tests were conducted on assorted sizes of model friction piles embedded in sedimented soil samples with consisted of a silt and clay mixture. Pilot holes of various diameters were cut in the samples. A theoretical load distribution curve was used to calculate the load transferred to the soil as a function of pile embedment. Laboratory vane shear test results were compared to the load transferred to the soil by the pile. Results of the research program indicate that: 1) The ratio of the load transferred to the soil to the undrained strength of the soil changes with depth in the sample, and with the ratio of the pilot hole diameter to the pile diameter, 2) an optimum pilot hole size exists for each pile which offers a balance between low soil disturbance and high load carrying capacity, 3) the soil sample size should be four to five times the pile size to achieve valid load test results, and 4) the ultimate load that a friction pile can support increases with time after pile insertion and with increased rates of penetration"--Abstract, page ii.


Armstrong, James C.

Committee Member(s)

Tinoco, Fernando H.
Aughenbaugh, N. B.


Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering


University of Missouri--Rolla

Publication Date



xi, 123 pages

Note about bibliography

Includes bibliographical references (page 46).


© 1969 Richard Milton Franke, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Piling (Civil engineering) -- Testing
Soil mechanics
Stress concentration

Thesis Number

T 2289

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Electronic OCLC #