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Title:

LANDSLIDES IN SENSITIVE MARINE CLAY IN EASTERN CANADA

Accession Number:

00236771

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309021960

Abstract:

THE REGIONAL ASPECTS OF THE LANDSLIDE PROBLEM IN THE ST. LAWRENCE RIVER LOWLANDS IS BRIEFLY REVIEWED. MORE DETAILED STUDIES OF THE LANDSLIDES IN THE AREA AROUND OTTAWA ARE STRESSED. A METHOD OF ANALYSIS FOR SLOPES IS SUGGESTED IN WHICH PARTICULAR ATTENTION IS GIVEN TO THE WEATHERED SURFACE LAYERS OF THE CLAY. SOME OF THE CONDITIONS LEADING TO LARGE RETROGRESSIVE LANDSLIDES ARE CONSIDERED. THE PROJECT DEMONSTRATES THAT LOCAL GEOLOGICAL CONDITIONS ARE IMPORTANT TO THE TYPE AND EXTENT OF LANDSLIDE ACTIVITY. IT WAS OBSERVED THAT INITIAL PHASES OF A LANDSLIDE FREQUENTLY TAKE PLACE IN FISSURED CLAY, WHICH BEHAVES IN A DISTINCT MANNER. THE OBSERVATION IS MADE THAT NO SINGLE SHEAR FAILURE MAY DEVELOP SIMULTANEOUSLY ON A NUMBER OF PLANES. THE POSSIBILITY NEEDS TO BE CONSIDERED OF RETROGRESSIVE LANDSLIDES AND LARGE EARTH FLOWS. REGIONAL AND GEOLOGICAL FEATURES OF THE AREA ARE DISCUSSED AND AREAS OF INTENSIVE LANDSLIDE ACTIVITY ARE ILLUSTRATED. IN AN ANALYSIS OF LANDSLIDES, INITIAL SLIDING, RETROGRESSIVE SLIDING AND VARIOUS SPECIFIC LANDSLIDES ARE REVIEWED. DESIGN AND CONTROL CONSIDERATIONS ARE PRESENTED. THE STUDY HAS LED TO THE DEVELOPMENT OF AN ANALYTIC AND TESTING PROCEDURE, AND ALTHOUGH THE DETAILED SAMPLING AND TESTING REQUIRED IN THE APPLICATION OF THESE PROCEDURES MAY NOT BE APPLICABLE TO ALL ROUTINE SLOPE STABILITY INVESTIGATIONS, AN UNDERSTANDING OF THE CONCEPTS OF HIGHLY FRICTIONAL BEHAVIOR AND DILATANCY AT LOW STRESS LEVELS AND CURVED FAILURE ENVELOPE MAY ASSIST IN ASSESSING REMEDIAL MEASURES SUCH AS SLOPE FLATTENING, TOE BERMS, OR DRAINAGE PROVISIONS.

Supplemental Notes:

Sponsored by Committee on Soil and Rock Properties. 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 Accession #:

00054617

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Eden, W J
Mitchell, R J

Pagination:

pp 18-27

Publication Date:

1973

Serial:

Highway Research Record

Issue Number: 463
Publisher: Highway Research Board

Conference:

52nd Annual Meeting of the Highway Research Board

Location: Washington District of Columbia, United States
Date: 1973-1-22 to 1973-1-26

ISBN:

0309021960

Media Type:

Digital/other

Features:

Figures (8) ; References (31) ; Tables (1)

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways

Files:

TRIS, TRB

Created Date:

Apr 27 1974 12:00AM

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