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Title:

INTERFERENCE EFFECTS BETWEEN TWO SURFACE FOOTINGS ON LAYERED SOIL

Accession Number:

00641435

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309055539

Abstract:

On many occasions, shallow footings are constructed too close to each other. For such conditions, the ultimate bearing capacity of the footings may be affected due to the interference of the failure surfaces in the soil below the footings. Laboratory model test results for the ultimate bearing capacity of two closely spaced surface strip footings supported by a layer of dense sand of limited thickness, underlain by a soft clay layer extending to a great depth, have been presented. The ultimate bearing capacities for a single and two closely spaced footings increase with the increase of the thickness (H) of the dense sand layer up to a maximum at H = H sub cr and remain constant thereafter. H sub cr is the depth of the sand layer at which the failure surfaces in the soil below the footings are fully confined to the top dense sand layer. For H < H sub cr, the group efficiency of the footings increases with the increase of their center-to-center spacing (S), reaching about 100% at S/B approximately 4 to 5 (where B is the footing width). However, for H > H sub cr, the group efficiency decreases with the increase of S/B and reaches 100% at S/B approximately 4 to 5.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1406, Construction Robotics and Automation, and Foundations 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 Accession #:

01403255

Language:

English

Authors:

Das, Braja M.
Puri, Vijay K
Neo, Boon K

Pagination:

p. 34-40

Publication Date:

1993

Serial:

Transportation Research Record

Issue Number: 1406
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309055539

Features:

Figures (10) ; References (9) ; Tables (1)

Uncontrolled Terms:

Model tests

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways; I42: Soil Mechanics

Files:

TRIS, TRB

Created Date:

Jan 25 1994 12:00AM

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