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Stability analysis of embankments and slopes
18A
must provide for sensitivity analysis of parameters. Selected elements of the design procedure developed herein are applied, for i~.l~stration purpose, to an actual design: the high cuts for the left spillway at Auburn Dam, California.
design, manufacture amd performance. 19F,2R.
CAN. ZNS~.~N.~AUt.~.V66,
~5,1973, ~88-97.
Groundwater problems GBERT, LA BUR. MINES, SPOK~NE, WASH. USA Rapid excavation and the role of the engineering geologist. In Geological factors in rapid excavation. Symposium. 7R. GEOL. SOC. AMER. EN~NG .GEOL. CASE HISTORY, N9,1973, PI-4.
PUGLIESE, JM BUR.MINES, ~WIN CITIES, MINN. USA Some geological structural influences in quarrying limestone and dolomite. In Geological factors i~ rapid excavation. Symposium. 8F,bR. GEOL. S0C. AMER. EI~G~. GEOL. CASE HISTORY, Ng, 1973, Pll- 16. An investigation into the extent to which geology, mainly structure, influences blasting practices and results in limestone and dolomite quarries, is reported. 30 quarries were visited and the blasting practices and structural geology were studied. The features observed to influence blasting included: horizontal bedding; folds; faults; unconformities; caves; and filled Joints.
HAMBURGER, R US ATOM. ENER. C(~@~.WASH. USA Geologic factors in rapid excavation with nuclear explosives. In Geological factors in rapid excavation. Symposium. 9F, 19R. GEOL. SOC.AMER.E~NS°GEOL.CASE HISTORY, Ng, 1973, P17-25. 147 sOWF~S, GM TEXAS A AND M UNIV.COLL. STATION, USA Theory of spacing of extension fracture. In Geological factors in rapid excavation. Symposium. 18F, 1T, 36R. GEOL. S0C .AMER. E~GNG. GEOL.CASE HI S~ORY, Ng, 1973, P27- 53. A new theory of spacing of extension fracture in flattened, or c(xnpressed layered rocks, provides a basis for predicting some fracture patterns, a.nd the theory is confirmed by modal studies. This theory may be applied in devising patterns of rock bolting and perhaps in setting charges in advancing rock faces in rapid excavations.
~48 ROACH, CH B~R. MINES, DENVER, COLO. USA Total systems approach to rapid excavation and its geological requirements. In Geological factors in rapid excavation. Symposium. 6F,24R. GEOL. SOC. AM~. ENGNG. GEOL. CASE HISTORY, Ng, 1 973, I%9- 78.
Construction methods ANONYMOUS Excavating 0 a~d K Style .-Report of the operations at the Hemmer Cement Hamburg works using a SHOO0 fully hydraulic bucket- wheeled excavator. 4F. CONSTRUCTION PLANT AND EQUTPMENT, V1, NI2,1973, P24-25. 150 ANONYMOUs Trench support, safety first.-Rep~rt of the demonstration of a new system of trench support, with details of construction and performance. 6F. CONSVI~tW~TION PLAN~ AND EQUIPMENT, VI, NI2,1973,P30-BI. 151 BULI~,~D The electric mining shovel.-Brief review amd history, of. shovels for ~xcav~tion, followed~ by explanation of function of electric shovel, its
HIGGS, NB Moutmorillonite and turbidity in water supplies. 1T, 2R. BULL. ASSOC. E ~ . GEOL. VlO, N3,1973, P243- 247.
Influence of dynamic loads due to explosions or earthquakes 153 GATES, RH ENGR. EXFLOS. EXCAV. RES. OFF. CALIF. USA Slope analysis for explosive excavations. Sympositlm. In Stability of rock slopes. 8F,25R. 13TH SYMPOSIUM ON ROCK MECHANICS ASCE, NEW YORK, 1972, P2~3- 268. A r e v i ~ is given of slope sm/~lysls for explosive excavations. The initial steps of such an analysis i.e. classification of media, prediction of crater geometry and estimation of crater zone stability properties are presented. Several methods of analysis are discussed e.g. empirical analyses~ limit c~uilibrium analyses amd continuum mechanical analyses. Examples of m~the~ticai models to represent stress-strsdn be~haviour of earth materials are given. The final step of the analysis, i.e. J~1~ent of stability potential of a planned crater is outlined.
154 SARMA s SK ~ . COIl. SCI .TECHNOL. LONDON, GB Stability analysis of embankments arg slopes.7F,2T,13R. GEOi~QUE, V23, N3,1973,P~23~33. A simple but accurate method of stability analysis of embankments and slopes is developed to d~termlne the critical ~arth~uake accelars~ion that is rmq~ired to bring a m~ss of soil, h o t b e d by a slip llns of a~y shape and the free surface, to a state of limiting e~nilibrium. At the same tim~, the usual factor of safety can be determined. It is based on the principle of lifaiting equilibrit~n and the method of slices. Effective stress s t r e r ~ p s r a m ~ s are used. A distribution of in~armal body fQrces is found based on a sim~le ~ssump~ion which deper4s on the geometry of the dam and the slldimg st~face as well as on the stre,~T~h of the material.. Though a computer is used for the calculations p r e s e ~ It is not essential. As in ar~ solution, the physlcal acceptability of the complete solution mus~ be checked before accepting the result. It is suggested to use the critical acceleration as a measure of the factors of safety. Auth.
Experimental and numerical techniques i55 SCOTT, JD UNIV. OITAWA, CDN WILSON, NE ~5~4AST~ UNIV.HAMILTON, ONTARIO, CDN BAVER, GE UNIV. OTTAWA, CDN Analysis and performance of a braced cut in sand with large defor~ions. I~F, 1BE. The paper is divided ir~o two parts. The first part deals with the sy~ematic programme of measurements umde~taken on an o ~ n braced cut in dense sand at the Greerway Pollution Control C e d e in Lordon, Ontario. In the. accord part, th~ ~ I m e n t a l d a ~ are arm/yzed and a mew solution is p r e ~ e ~ based on D~hrova's ar~lysls, which related qualltatlvelY and ~ 1 ~ i t a t i v e l y ~he active ear+~h l~essure distribution to the mode of deformation of a retaining structure. The Instrumentation progranm~ was carried out during the 6-month construction
must provide for sensitivity analysis of parameters. Selected elements of the design procedure developed herein are applied, for i~.l~stration purpose, to an actual design: the high cuts for the left spillway at Auburn Dam, California.
design, manufacture amd performance. 19F,2R.
CAN. ZNS~.~N.~AUt.~.V66,
~5,1973, ~88-97.
Groundwater problems GBERT, LA BUR. MINES, SPOK~NE, WASH. USA Rapid excavation and the role of the engineering geologist. In Geological factors in rapid excavation. Symposium. 7R. GEOL. SOC. AMER. EN~NG .GEOL. CASE HISTORY, N9,1973, PI-4.
PUGLIESE, JM BUR.MINES, ~WIN CITIES, MINN. USA Some geological structural influences in quarrying limestone and dolomite. In Geological factors i~ rapid excavation. Symposium. 8F,bR. GEOL. S0C. AMER. EI~G~. GEOL. CASE HISTORY, Ng, 1973, Pll- 16. An investigation into the extent to which geology, mainly structure, influences blasting practices and results in limestone and dolomite quarries, is reported. 30 quarries were visited and the blasting practices and structural geology were studied. The features observed to influence blasting included: horizontal bedding; folds; faults; unconformities; caves; and filled Joints.
HAMBURGER, R US ATOM. ENER. C(~@~.WASH. USA Geologic factors in rapid excavation with nuclear explosives. In Geological factors in rapid excavation. Symposium. 9F, 19R. GEOL. SOC.AMER.E~NS°GEOL.CASE HISTORY, Ng, 1973, P17-25. 147 sOWF~S, GM TEXAS A AND M UNIV.COLL. STATION, USA Theory of spacing of extension fracture. In Geological factors in rapid excavation. Symposium. 18F, 1T, 36R. GEOL. S0C .AMER. E~GNG. GEOL.CASE HI S~ORY, Ng, 1973, P27- 53. A new theory of spacing of extension fracture in flattened, or c(xnpressed layered rocks, provides a basis for predicting some fracture patterns, a.nd the theory is confirmed by modal studies. This theory may be applied in devising patterns of rock bolting and perhaps in setting charges in advancing rock faces in rapid excavations.
~48 ROACH, CH B~R. MINES, DENVER, COLO. USA Total systems approach to rapid excavation and its geological requirements. In Geological factors in rapid excavation. Symposium. 6F,24R. GEOL. SOC. AM~. ENGNG. GEOL. CASE HISTORY, Ng, 1 973, I%9- 78.
Construction methods ANONYMOUS Excavating 0 a~d K Style .-Report of the operations at the Hemmer Cement Hamburg works using a SHOO0 fully hydraulic bucket- wheeled excavator. 4F. CONSTRUCTION PLANT AND EQUTPMENT, V1, NI2,1973, P24-25. 150 ANONYMOUs Trench support, safety first.-Rep~rt of the demonstration of a new system of trench support, with details of construction and performance. 6F. CONSVI~tW~TION PLAN~ AND EQUIPMENT, VI, NI2,1973,P30-BI. 151 BULI~,~D The electric mining shovel.-Brief review amd history, of. shovels for ~xcav~tion, followed~ by explanation of function of electric shovel, its
HIGGS, NB Moutmorillonite and turbidity in water supplies. 1T, 2R. BULL. ASSOC. E ~ . GEOL. VlO, N3,1973, P243- 247.
Influence of dynamic loads due to explosions or earthquakes 153 GATES, RH ENGR. EXFLOS. EXCAV. RES. OFF. CALIF. USA Slope analysis for explosive excavations. Sympositlm. In Stability of rock slopes. 8F,25R. 13TH SYMPOSIUM ON ROCK MECHANICS ASCE, NEW YORK, 1972, P2~3- 268. A r e v i ~ is given of slope sm/~lysls for explosive excavations. The initial steps of such an analysis i.e. classification of media, prediction of crater geometry and estimation of crater zone stability properties are presented. Several methods of analysis are discussed e.g. empirical analyses~ limit c~uilibrium analyses amd continuum mechanical analyses. Examples of m~the~ticai models to represent stress-strsdn be~haviour of earth materials are given. The final step of the analysis, i.e. J~1~ent of stability potential of a planned crater is outlined.
154 SARMA s SK ~ . COIl. SCI .TECHNOL. LONDON, GB Stability analysis of embankments arg slopes.7F,2T,13R. GEOi~QUE, V23, N3,1973,P~23~33. A simple but accurate method of stability analysis of embankments and slopes is developed to d~termlne the critical ~arth~uake accelars~ion that is rmq~ired to bring a m~ss of soil, h o t b e d by a slip llns of a~y shape and the free surface, to a state of limiting e~nilibrium. At the same tim~, the usual factor of safety can be determined. It is based on the principle of lifaiting equilibrit~n and the method of slices. Effective stress s t r e r ~ p s r a m ~ s are used. A distribution of in~armal body fQrces is found based on a sim~le ~ssump~ion which deper4s on the geometry of the dam and the slldimg st~face as well as on the stre,~T~h of the material.. Though a computer is used for the calculations p r e s e ~ It is not essential. As in ar~ solution, the physlcal acceptability of the complete solution mus~ be checked before accepting the result. It is suggested to use the critical acceleration as a measure of the factors of safety. Auth.
Experimental and numerical techniques i55 SCOTT, JD UNIV. OITAWA, CDN WILSON, NE ~5~4AST~ UNIV.HAMILTON, ONTARIO, CDN BAVER, GE UNIV. OTTAWA, CDN Analysis and performance of a braced cut in sand with large defor~ions. I~F, 1BE. The paper is divided ir~o two parts. The first part deals with the sy~ematic programme of measurements umde~taken on an o ~ n braced cut in dense sand at the Greerway Pollution Control C e d e in Lordon, Ontario. In the. accord part, th~ ~ I m e n t a l d a ~ are arm/yzed and a mew solution is p r e ~ e ~ based on D~hrova's ar~lysls, which related qualltatlvelY and ~ 1 ~ i t a t i v e l y ~he active ear+~h l~essure distribution to the mode of deformation of a retaining structure. The Instrumentation progranm~ was carried out during the 6-month construction