Slope stability and quarry planning

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822222 STABILITY OF COTS ON THE M~ NORTH OF CARDIFF Newbery, J; Baker, D A B Q J Engmg Geol, V14, N3, 1981, P195-205 Presents a case history of the construction of cuts on the Castleton to Cc~yton section of the M4 motorwa~. The cuts were formed in highly folded amd faulted soft rocks. A tension crack appeared on the excavated slope of the Wer~11t cut and investigations into this failure were subsequently carried out. Residual strer~ah testing was carried out stud back a r ~ s i s used to determine the effect of possible remedial measures. The only practical solution involved removal of the slipped material which was then partially replaced by a toe berm incorporating drainage measures.

822223 SIMPLE METHODS TO ANALYZE BUCKLING OF ROCK SLOPES Cave~'s, D S Rock Mech, VI4, N2, Aug 1581, P87-I04 Buckling failure may be initiated by ar~ of the following mechanisms: grour~water pressures, slope geometry, forces extermal to the slope, stud very high stresses in the plane of the slab. Simple analytical models are presented for 3 failure modes: i) flexx~ral buckling of plane slopes, (2) 3 hinge buckling of plane slopes, and (3) 3 hinge buckling of curved slopes. The applicability of the 3 hinge model was tested by al~lylng the developed equations to a documented failure on an excavated slope. The method gave reasonable results.

822227 SLOPE PROTECTION ALONG ST LAWRENCE SEAWAY CANALS 01pinski, K; Christensen, C J Can Gaotech J, VI8, N3, Aug 1981, P402-419 The methods used to protect the canal slopes of the 3700km long St Lawrence Seaway system are described. Banks requiring protection consist of shale, broken shale, silts, silty clays, clays, or glacial till. The methods used are: concrete slabs, riprap anl armour stone, grouted riprap, soil-cement, gabions, mattresses filled with cement slurry, protective rolls, aud vegetation. The design, construction and performance of these are described.

822228 DESIGN METHOD FOR STABILIZING PILES AGAINST LANDSLIDE - ONE ROW OF PILES Ito, T; Matsui, T; Hong, W P Soils Foumd, V21, N1, March 1981, P21-37 The design .method for a row of stabilising piles within a slope with a sliding surface is investigated. First a basic method for stability analysis of the s~ope containing the piles is described. Then some studies of the effect of mar~ factors are carried out for an example of a lar~Islide containing stabilising piles. Factors which have considerable effect are shown to include interval between piles, fixity condition of pile head, pile length above sliding surface, pile diameter amd stiffness of steel pipe pile. Based on these studies a new design method fc~ stabilisirg piles is proposed.

822229 STABILITY ANALYSIS OF SLOPES BY MEANS OF A MINI822224 FINITE m L ~

ANALYSIS OF MINE SPOIL SLOPES USING SLIP ELEMENTS TO SIMULATE STRAIN S 0 ~ N I N G YIELD B ~ V I O R Richards, B G Instn Er~rs Australia, Civ Em6rng Trans, VCE24, NI, Feb 1982 Reports an analysis of the spoil heap at Goo~ella coal mine, Queensland, Australia, and more general analyses of slopes of homogeneous material all of which give good agreement with observed behaviour.

822225 PORE WATER PRESSURE IN NATURAL SLOPES. SHORT COMMUNICATION Chugh, A K Int J N~m Anal Meth Gec~ech, VS, ~ , Oct-Dec

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(IN nAL~N)

Franciosi, V; Miglicre, M Riv Ital Geotech, V14, ~ , Oct-Dec 1980, P2~7261 The analysis is performed within a semistochastic aPlm~oach referring to a limit state. Calculations were carried out on a HP97 minicomputer. Examples are presented and compared with results obtained with a different method. Results from the various methods are in substantial agreement.

Hydraulic structures 822230 IN THE WAKE OF NZ'S CANAL FAILURE New Civ Er~r, ~467, 19 Nov 1981 , P12-13

1981, ~9-454 Estimating subsurface pore water pressures in natural slopes along the peril~hery of rivers anl reservoirs for future corditions, created by the operational requirements to meet increases in energy demani from the observed data of the past and present operations, is possible with the use of a mathematical model. An effective algorithm for calculating pore water ~ressure at a ~ location in a slope stability section is to use a complete polynomial ard to assure g e c ~ c invarianee of the calculated results. Auth.

822226 SLOPE STABILITY AND QUARRY PLANNING Cormell,F, R J Quarry Manage Prod, VS, N8, Aug 1981, P553-557 simplified models of the main failure modes of slopes are described: circular, plane, wedge ard topplIDg failure. Slope stability analysis using limit equilibrium analysis is discussed. This is based on the basic shear strer~th eq%lation. Data to be collected includes rock or soil stremgth, the l~tllrej extent ~ orientation of Joints, faults etc, and water pressures. The design and risk analysis of quarries is then discussed.

Briefly reports the collapse of a bank of the feeder canal for the Ruahihl power plant, New Ze~and, giving s~ne details of the soil conditions but concentrating on the contractual aspects.

822231 LANDSLIDE PROBLEMS IN WINNIPEG Baracos, A; Graham, J Can Geoteeh J, VI8, N3, Aug 1981, P390-hOl Describes the topography, floodimg and the soil properties of Wir~peg, Manitoba, C a r ~ , which is built on swelling, plastic clays and suffers from lardslidiDg in the riverbanks. Legislation governir~ riverbank development is reviewed. The slope stability analysis csrried out at Winnipeg is outlined. Current design l~actices for riverbank development are discussed, also their application to stabilising measures in Winnipeg.

822232 CHALK SLOPE FAILURE AT GAINSVILI~ LOCK, ALABAMA Bryan, J H Bull Assoc Engng Gaol, V18, N13 Feb 1981, I~5-69