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Title: Horizontal Drains in a Clay–Landslide Stabilization Test Program
Accession Number: 01122232
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: During highway construction, a large ancient landslide was discovered within the Cattaraugus Creek Valley in western New York State. An active landslide was contained within this ancient landslide complex. The depth of the slide is approximately 30 m (100 ft). The purpose of the horizontal drain installation test program was to determine the feasibility of reducing pore-water pressures within a clay stratum by using dewatering techniques. The test demonstrated that horizontal drains could be installed with moderate difficulty. More than 90% of the installed horizontal drains produced discharge water. Flow rates were low but consistent with horizontal drain experience in clayey soils. Most of the original working drains were still discharging water 6 months after installation. Several of the piezometers appeared to have responded to the horizontal drains. One piezometer showed a gradual drawdown of 3.8 m (12 ft) during the first 6 months. A reduction in the rate of slide movement was also observed.
Monograph Title: Monograph Accession #: 01147419
Report/Paper Numbers: 09-2795
Language: English
Authors: Black, Brent AMachan, GeorgePoelma, MichaelPagination: pp 35-40
Publication Date: 2009
ISBN: 9780309126311
Media Type: Print
Features: Figures
(3)
; Photos
(3)
; References
(6)
; Tables
(1)
TRT Terms: Geographic Terms: Subject Areas: Geotechnology; Highways; I42: Soil Mechanics
Files: TRIS, TRB, ATRI
Created Date: Jan 30 2009 7:09PM
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