"Horizontal drains have been widely used to stabilize soil and rock slopes for the past 50 years. The current technology for this technique involves the installation of slotted PVC drains through the use of horizontal boring equipment. In this research, a new improvement to this technique has been developed and tested at the University of Missouri--Rolla. This improvement involves using wick drain material, currently installed vertically for expediting consolidation, as a replacement for PVC drains. The wick drain is installed horizontally using a simple driving method that requires no soil boring. This technique was tested by installing the drains in a field-scale test embankment. Tests were conducted to simulate both transient and steady-state phreatic conditions. Water levels, drainage amount, and slope movements were analyzed for each test. The results were used to determine the factor of safety improvement resulting from the installed drains. The tests showed that under certain conditions, the horizontal wick drains did lower the phreatic surface and improve the factor of safety of the slope. The design of horizontal drains for slope stabilization is also discussed. A design chart and a method of determining drain spacing, drain length, and the resulting increase in the factor of safety is also presented"--Abstract, page iii.
Santi, Paul M. (Paul Michael), 1964-
Elifrits, C. Dale
Stephenson, Richard Wesley
Geosciences and Geological and Petroleum Engineering
M.S. in Geological Engineering
University of Missouri--Rolla
ix, 93 pages
© 2000 James Arnold Liljegren, All rights reserved.
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Liljegren, James Arnold, "Horizontal wick drains: A testing and design study" (2000). Masters Theses. 1911.
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