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A Systematic Analysis of Pit Slope Structures by the Stiffness Matrix Method.

Authors
Wang-F; Sun-MC
Source
NTIS: PB 190 774 :37 pages
Link
NIOSHTIC No.
10008926
Abstract
A two-dimensional plane strain analysis by the stiffness matrix method was used to analyze two basic pit slope configurations. The magnitudes and the directions of stresses are given for a v-shape and for a flat-bottom pit with the slope angle varying from 30 deg. to 90 deg. At 10 deg. Intervals. Stress effects due to irregular pit configuration or to in situ forces are discussed. Equations of similitude for gravity loading are given. Expressions are also given for the stresses at the toe as a function of slope angle. Procedures are given for finding the stresses in any geometrically similar pit slope of different dimensions and material properties from the stresses and equations presented in this report. Numerical results show that the v-shape pit slopes have lower stresses than the flat-bottom pit slopes; hence, they are inferred to be more stable.
Publication Date
19700101
Document Type
IH; Report of Investigation;
Fiscal Year
1970
NTIS Accession No.
PB-190774
NTIS Price
A04
Identifying No.
RI 7343
NIOSH Division
DRC;
Source Name
NTIS: PB 190 774
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