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Title:

SHEAR STRENGTH INCREASE IN A SOFT FOUNDATION CLAY

Accession Number:

00236772

Record Type:

Component

Availability:

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

Abstract:

THE INCREASE IN SHEAR STRENGTH IN SOFT CLAY DUE TO CONSOLIDATION UNDER HIGHWAY EMBANKMENT LOADING IS STUDIED. VERTICAL SHEAR DRAINS WERE USED TO ACCELERATE THE PROCESS OF CONSOLIDATION. THE GAIN IN SHEAR STRENGTH WAS MEASURED OVER A FOUR-YEAR PERIOD AFTER CONSTRUCTION OF THE EMBANKMENT. IT IS SHOWN THAT THE EXCESS PORE WATER PRESSURE MEASURED IN THE FIELD CAN BE USED TO PREDICT THE INCREASE IN SHEAR STRENGTH WITH REASONABLE ACCURACY. DETAILS ARE GIVEN OF THE SUBSURFACE PROFILE WHICH CONSISTS OF A RELATIVELY HOMOGENEOUS, GRAY BAY MUD COMBINED WITH BROKEN SEASHELLS TO A DEPTH OF 50 TO 70 FEET. LABORATORY SHEAR STRENGTH WAS OBTAINED FROM TESTS ON UNDISTURBED SAMPLES TAKEN FROM BORING HOLES BY USING THE UNCONFINED COMPRESSION TEST (U-TEST) AND THE UNCONSOLIDATED-UNDRAINED TRIAXAIL COMPRESSION TEST (UU- TEST). THE SAMPLES WERE OBTAINED BY EITHER PUSHING A TWO- INCH CALIFORNIA SAMPLER HYDRAULICALLY INTO THE BAY MUD OR PUSHING A SWEDISH FOIL SAMPLER INTO CLAY LAYERS. THE ANALYSIS OF THE SHEAR STRENGTH INCREASE IS PRESENTED, AND THE RESULTS ARE TABULATED AND DISCUSSED. IT IS CONCLUDED THAT EXCESS PORE PRESSURE DATA GENERALLY YIELD A BETTER ESTIMATE OF STRENGTH GAIN AND IS PREFERABLE TO THE USE OF TIME-SETTLEMENT DATA.

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:

Su, Hon-Hsieh
Chang, Jerry C
Forsyth, Raymond A

Pagination:

pp 28-34

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 (5) ; References (5) ; Tables (3)

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways

Files:

TRIS, TRB

Created Date:

Apr 27 1974 12:00AM

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