00235381

Component

http://onlinepubs.trb.org...rbbulletin/216/216-002.pdf

GENERALLY, ATTEMPTS TO INCREASE THE FACTOR OF SAFETY OF AN EARTH SLOPE INVOLVE EITHER DRAINAGE OR EXCAVATION. THE OBJECT OF DRAINAGE IS A LOWERING OF THE WATER TABLE, WITH AN ACCOMPANYING REDUCTION IN THE MAGNITUDE OF FAVORABLE FORCES. IN THE PRESENT PAPER SEVERAL GRAPHS ARE PRESENTED WHICH ENABLE THE ENGINEER TO ESTIMATE THE AMOUNT OF DRAINAGE NECESSARY TO ACHIEVE A DESIRED FACTOR OF SAFETY. THESE GRAPHS YIELD SAFETY FACTORS CORRESPONDING TO VARIOUS LEVELS OF WATER TABLE IN AN EARTH MASS WHERE THE FAILURE PLANE WOULD APPROXIMATE A SWEDISH ARC LOCATED IN A CLAY BANK UNDERLAIN BY A PERMEABLE STRATUM. AN ALTERNATIVE PROCEDURE IMPROVES STABILITY BY UNLOADING THE SLOPE. IT IS SHOWN THAT FLATTENING THE SLOPE IS MUCH LESS EFFECTIVE THAN BENCHING PER UNIT OF EXCAVATION. GRAPHS ARE PRESENTED WHICH PLOT FACTOR OF SAFETY AGAINST QUANTITY OF EXCAVATION FOR BOTH BENCHING AND SLOPE REDUCTION. /AUTHOR/

No 216, pp 17-30, 24 FIG, 3 REF, 2 APP 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.

01410609

14p

1959

Highway Research Board Bulletin

Digital/other

Benching; Drainage; Excavations; Graphics; Safety; Slope stability; Slopes; Water table

Graphical analysis

Geotechnology; Highways; Hydraulics and Hydrology; Safety and Human Factors

TRIS, TRB

May 5 1994 12:00AM

• COMPUTER SOLUTION OF SWEDISH SLIP CIRCLE ANALYSIS FOR EMBANKMENT FOUNDATION STABILITY
• REGIONAL CONCEPT OF LANDSLIDE OCCURRENCE