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Construction on expansive rock
99A
815165 MEMBRANES IN GROUND ENGINEERING Ramkilor, P R Chichester: Wiley, 19@1, 377P Includes a general discussion on mmmbranes, materials available, design a~i installation details, lab t e s t s for asses~nent a~i prediction of m~nbrane performance. 815166 STOCHASTIC F~M IN S E ~ PREDICTION Baecher, G B; Imgra, T S J Geutech Em~mg Div ASCE, VI07, N ~ , April 1981, ~ 9 - ~ 6 3 Stochastic finite element arelysls is used to predict uncertainties in total ard d i f f e r e n t i a l settlement um~er a large flexible footing. The results are compared with one-dlmausiomal stochastic solutions already in t h e literature. Differences between the one- anl two-dlmensionsl analyses, particularly for differential settlesent, are distinct. 'l~ese differences seem p r ~ - ~ r i l y attributable to r a ~ i o m n e s s in t h e s t r e s s field which cammo~ be included in onedimensional models, a~i to mechanistic correlations by c o . n o n d e p e n d e n c e on t h e r e s l i s a t i o n s of particular ra~iom variables. In principle second-moment techniques can be extended to a broad ramge of analyses now performed using finite element and finite difference techniques. Auth.
815167 MINIMIZATION OF B ~ I N G
HEAVE BY C H ~ C A L L Y INHIBITING GYPSUM-INDUCED SHALE EXPANSION: A PR~.7~INARY REPORT Hull, A B; COdy, R D; Green, S A Proc 21st US Symposium on Rock Mechamics, Rolla, Missouri, 28-30 May 1960, P~98-505
Investigates the effect of sulfate scale irhlhitory compou~Is ul~on the nucleation ami growth of gypsum in ish~atcry eystems simulating the acidic black s h a l e h e a v e e n v i r o n m e n t . P r e l i m i D a r y r e s u l t s indicate that periodic applications of imhlhltcr may b e a viable al~roach to mlnimislng black shale heave.
Dams and embankments See also: 815066, 815199 815168 CONSTRUCTION ON EXPANSIVE ROCK Logani, K L Prom 4th Intermatlomal Conference on Expansive Soils, Denver, 16-18 June 1980,
vol l, ~%-513 Discusses special construction measures at the Ullum Dam in Argentina where a spillway was founded on an expansive rock stratum. Laboratory ard field tests ani post construction monitoring are also described. 815169 P~vORMARUE MONITORII~ FOR DAM SA~A% Szalay, K Int Water Power Dam Constr, V32, Ng, Sept 1980, P21-26 Gives a general account inclucLing functions of instrumentation systems, design, installation, data processing ani evaluation, cor~entrating on organisationsl rather than technical aspects.
815170 B L A ~ S FOR DAMS ON F ~ I O U S FOUNDATIONS Gill, M A Int Water Power Dam Comstr, V32, Ng, Sept 1980, ~7-50 Discusses seepage beneath dams with and without impervious cr seml-pervious bla~ets upstream or downstream of the dam. Concludes that the use of a downstream blar~et is not to be reconnended, although it is effective in reducing seepage, as maintens~ce is difficult ani there is virtually no reduction in uplift l~'essureQ 815171 SEI~41C RESPONSE OF TWO MEXICAN DAMS Int Water Po~er Dam Constr, V32, NS, Aug 1980, P15, 35 Reports measurements on the E1 I~fie~nillo amd La Villita dams on the occasion of the 14 March 1979 earthquake, and ccmp~es with predictions made by 2-dimensional, nonlinear finite element models. (Digest of reports published by the Comision Federal de Electricidad of Mexico). 815172 FAILURE MECHANISMS IN DAMS SUBJECT TO EARTHQUAKES Herzog, M A M Int Water Power Dam Constr, 9-32, NS, Aug
1980, P28-30 Presents tentative failure machani~ns ani failure criteria for concrete gravity dams, concrete arch dams anl embankment dams under earthquake conditions. 815173 LIQUEFACTION, CYCLIC MOBILITY A~D EARTH DAMS Ferrito, J; Fcwrest, J In% Water Power Dam Constr, V32, NS, Aug 1980, P30-35 Discusses the liquefaction ani cyclic mobility of saturated cohesionless soils under seismic loading, ani gives examples of the p e r f c r , ~ e o f various a,m= which have b e e n s u b j e c t e d t o earthquake activity. Discusses methods of evaluating liquefaction a~d a~alytical methods applicable to earth d~me. 815174 LARGE DAMS SD4POSIUM Balasubr,-~nlamj A S Ground Engr~, Vl~, N4, May 1981, P~JO-53 A report of the Internstio~al Symposium on Large Dams held at the Asian Institute of Technology, Bamgkok, Th-~la~i, in December 1980. 815175 RANDOM VIBRATION ANALYSIS FCR THE SEIS4IC RESPONSE OF EARTH DAMS Gazetas, G; Dehchaudhury, A; Gasparlml, D A GeotechzLique, V31, N2, June 1981, P261-Z77 P r e s e n t s a random v i b r a t i o n f v A ~ A l a t i o n t o s t u d y dynamic b s h a v i o u r o f e a r t h eA~= m o d e l l e d a s
inhc~ogeneous shear beams a~i excited by vertic=_l shear waves. Results are presented in the fcrm of v a r i a t i o n
w i t h time~ ~
distribution
with
depth from the crest, of statics of displacements, accelerations, shear strains ar~ seismic coefficients on potential sliding masses. Key factors that influence the d y r ~ c behavlour are identified anl their effect is demonstrated through a number of parametric plots.
815165 MEMBRANES IN GROUND ENGINEERING Ramkilor, P R Chichester: Wiley, 19@1, 377P Includes a general discussion on mmmbranes, materials available, design a~i installation details, lab t e s t s for asses~nent a~i prediction of m~nbrane performance. 815166 STOCHASTIC F~M IN S E ~ PREDICTION Baecher, G B; Imgra, T S J Geutech Em~mg Div ASCE, VI07, N ~ , April 1981, ~ 9 - ~ 6 3 Stochastic finite element arelysls is used to predict uncertainties in total ard d i f f e r e n t i a l settlement um~er a large flexible footing. The results are compared with one-dlmausiomal stochastic solutions already in t h e literature. Differences between the one- anl two-dlmensionsl analyses, particularly for differential settlesent, are distinct. 'l~ese differences seem p r ~ - ~ r i l y attributable to r a ~ i o m n e s s in t h e s t r e s s field which cammo~ be included in onedimensional models, a~i to mechanistic correlations by c o . n o n d e p e n d e n c e on t h e r e s l i s a t i o n s of particular ra~iom variables. In principle second-moment techniques can be extended to a broad ramge of analyses now performed using finite element and finite difference techniques. Auth.
815167 MINIMIZATION OF B ~ I N G
HEAVE BY C H ~ C A L L Y INHIBITING GYPSUM-INDUCED SHALE EXPANSION: A PR~.7~INARY REPORT Hull, A B; COdy, R D; Green, S A Proc 21st US Symposium on Rock Mechamics, Rolla, Missouri, 28-30 May 1960, P~98-505
Investigates the effect of sulfate scale irhlhitory compou~Is ul~on the nucleation ami growth of gypsum in ish~atcry eystems simulating the acidic black s h a l e h e a v e e n v i r o n m e n t . P r e l i m i D a r y r e s u l t s indicate that periodic applications of imhlhltcr may b e a viable al~roach to mlnimislng black shale heave.
Dams and embankments See also: 815066, 815199 815168 CONSTRUCTION ON EXPANSIVE ROCK Logani, K L Prom 4th Intermatlomal Conference on Expansive Soils, Denver, 16-18 June 1980,
vol l, ~%-513 Discusses special construction measures at the Ullum Dam in Argentina where a spillway was founded on an expansive rock stratum. Laboratory ard field tests ani post construction monitoring are also described. 815169 P~vORMARUE MONITORII~ FOR DAM SA~A% Szalay, K Int Water Power Dam Constr, V32, Ng, Sept 1980, P21-26 Gives a general account inclucLing functions of instrumentation systems, design, installation, data processing ani evaluation, cor~entrating on organisationsl rather than technical aspects.
815170 B L A ~ S FOR DAMS ON F ~ I O U S FOUNDATIONS Gill, M A Int Water Power Dam Comstr, V32, Ng, Sept 1980, ~7-50 Discusses seepage beneath dams with and without impervious cr seml-pervious bla~ets upstream or downstream of the dam. Concludes that the use of a downstream blar~et is not to be reconnended, although it is effective in reducing seepage, as maintens~ce is difficult ani there is virtually no reduction in uplift l~'essureQ 815171 SEI~41C RESPONSE OF TWO MEXICAN DAMS Int Water Po~er Dam Constr, V32, NS, Aug 1980, P15, 35 Reports measurements on the E1 I~fie~nillo amd La Villita dams on the occasion of the 14 March 1979 earthquake, and ccmp~es with predictions made by 2-dimensional, nonlinear finite element models. (Digest of reports published by the Comision Federal de Electricidad of Mexico). 815172 FAILURE MECHANISMS IN DAMS SUBJECT TO EARTHQUAKES Herzog, M A M Int Water Power Dam Constr, 9-32, NS, Aug
1980, P28-30 Presents tentative failure machani~ns ani failure criteria for concrete gravity dams, concrete arch dams anl embankment dams under earthquake conditions. 815173 LIQUEFACTION, CYCLIC MOBILITY A~D EARTH DAMS Ferrito, J; Fcwrest, J In% Water Power Dam Constr, V32, NS, Aug 1980, P30-35 Discusses the liquefaction ani cyclic mobility of saturated cohesionless soils under seismic loading, ani gives examples of the p e r f c r , ~ e o f various a,m= which have b e e n s u b j e c t e d t o earthquake activity. Discusses methods of evaluating liquefaction a~d a~alytical methods applicable to earth d~me. 815174 LARGE DAMS SD4POSIUM Balasubr,-~nlamj A S Ground Engr~, Vl~, N4, May 1981, P~JO-53 A report of the Internstio~al Symposium on Large Dams held at the Asian Institute of Technology, Bamgkok, Th-~la~i, in December 1980. 815175 RANDOM VIBRATION ANALYSIS FCR THE SEIS4IC RESPONSE OF EARTH DAMS Gazetas, G; Dehchaudhury, A; Gasparlml, D A GeotechzLique, V31, N2, June 1981, P261-Z77 P r e s e n t s a random v i b r a t i o n f v A ~ A l a t i o n t o s t u d y dynamic b s h a v i o u r o f e a r t h eA~= m o d e l l e d a s
inhc~ogeneous shear beams a~i excited by vertic=_l shear waves. Results are presented in the fcrm of v a r i a t i o n
w i t h time~ ~
distribution
with
depth from the crest, of statics of displacements, accelerations, shear strains ar~ seismic coefficients on potential sliding masses. Key factors that influence the d y r ~ c behavlour are identified anl their effect is demonstrated through a number of parametric plots.