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The stability of scarp slopes.

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McKellar, John Bruce Alastair (1956) The stability of scarp slopes. Unspecified thesis, University of Tasmania.

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Abstract

I PURPOSE:
THE STABILITY OF SCARP SLOPES.
INTRODUCTION.
With the investigation and development of large-scale
engineering projects the engineering geologist is faced with problems,
the solution of which may well determine the economic feasibility of
those projects. Among the most vital problems, particularly in the
field of hydro—electric engineering, are those concerning the
stability of slopes. The purpose of this thesis is to outline the
investigation of one such problem, to state the observed facts and
to offer interpretations of these facts.
II THE PROBLEM: The proposed construction of hydro-electric
installations on the face of the Western Tiers of Tasmania
necessitated a study of the stability of slopes on this actively
retreating scarp. Abundant evidence of rock slips and extensive
scree and talus deposits reflect the general instability of the
Tiers face. Any structure contemplated must be located to minimise
the danger of extensive rock slides from higher levels. A study of
the mechanisms of retreat and an assessment of the stability of
cliffs and rock-slide material is undoubtedly the major problem
of the geology of this scheme. III INVESTIGATION METHODS: The investigations were carried out
in two phases:
Phase 1: The compilation of a detailed geological map with appropriate
contour information over an area broad enough to include all
the salient features of the Western Tiers.
Geological boundaries were plotted on aerial photos and transferred
to map squares prepared from aerial photos by the HydroElectric
Commission. At the same time barometric traverses were
carried out and from these, with the help of steroscopic inspection
of the aerial photos, a rough contour map was prepared.
(NOTE: After the field work was completed the Mapping Branch of
the Tasmanian Lands and Survey Department produced a contour map
of the southern portion of the area chosen. These contours have been substituted for the Author's in maps included in this thesis.)
The stratigraphic succesion was established from field mapping
and core logging of diamond drilling carried out by the HydroElectric
Commission.
Phase 2:A close examination of structures, superficial deposits
and vegetation which provides evidenCe of recent and imminent scarp
retreat.
Plane-Table mapping of selected areas with the recording of the
physical characters and disposition of scree blocks, joint patterns
in outcrops and vegetation data provided the "control areas" for
photo interpretation of the scarp face generally.
Diamond drill cores provided subsurface information on scree
and talus deposits.
IV PRESENTATION: The thesis is presented in three parts:
PART A: GENERAL DESCRIPTION OF THE AREA.
The location, access and climate of the area and the broader
aspects of its physiography and geology are intended as a general
introduction to the more detailed treatment in subsequent Parts of
this thesis.
PART B. HISTORY AND CHARACTER OF THE WESTERN TIERS.
The origin and subsequent history preface a detailed description
of the scarp in terms of slope elements.
PART C. STABILITY ANALYSIS OF SCARP SLOPES.
An analysis of the data presented in Part B. is attempted with
a view to its general application to problems of stability of
scarp slopes.

Item Type: Thesis (Unspecified)
Keywords: Slopes (Physical geography)
Copyright Holders: The Author
Copyright Information:

Copyright 1956 the Author - The University is continuing to endeavour to trace the copyright
owner(s) and in the meantime this item has been reproduced here in good faith. We
would be pleased to hear from the copyright owner(s).

Additional Information:

Map on folded leaf in pocket. Thesis (M.Sc.)--University of Tasmania, 1957

Date Deposited: 19 Dec 2014 02:30
Last Modified: 29 Sep 2017 06:35
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