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Title:

CONSIDERATIONS FOR STABILIZING DRAINED FAILURES OF SLOPES

Accession Number:

00489538

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309047706

Abstract:

Three drained slope failures bordering I-37 in San Antonio, Texas, occurred during the fall and early winter of 1986. One failure resulted from adverse natural seepage conditions, where as the other two failures resulted from a broken water main and a disrupted surface drainage system. The latter two failures were stabilized by eliminating the water entering the slopes. Several procedures were considered for stabilization of the first failure. Use of horizontal drains was judged to be the most effective in raising the long-term factor of safety for the slope. The design of horizontal drainage systems is reviewed and sample calculations are provided to illustrate that many combinations of drain length and spacing can result in approximately equal gains in factor of safety with time and that longer drains that can achieve higher long-term factors of safety can be only marginally more expensive than systems with shorter drains. A second finding is that there is a limit on the benefit of increasing drain length to increase long-term factors of safety.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1192, Soil Engineering. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

Monograph Title:

Soil engineering

Monograph Accession #:

01413981

Authors:

Isenhower, William M

Pagination:

p. 70-78

Publication Date:

1988

Serial:

Transportation Research Record

Issue Number: 1192
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309047706

Features:

Figures (12) ; References (8) ; Tables (1)

Subject Areas:

Design; Geotechnology; Highways; Hydraulics and Hydrology; Safety and Human Factors; I26: Water Run-off - Freeze-thaw

Files:

TRIS, TRB, ATRI

Created Date:

Nov 30 1989 12:00AM

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