118A is not the case for leakage and drainage analysis, where a stationary flow field may be established in a short time. This aspect is examined and a new well function proposed. 883109 P e r ~ laws in dams of earth-rock materials (In French) Fry, J J; Fiavigny, E; Taquet, B Proc Nimth ~ a m CmC'ereace on Soil Meeimaies and F ~ Fam#~, C,r~er F~yoctsia C,eoteeleaml F,q i m u f i q , Dc~la, 31 A q - 3 Sept 1987 V1, P39-42. Publ Rotterdam: A A Balkema, 1987 Determination of permeability is a difficult and important task in feasibility studies of dams in earth-rock materials. Influences of drainage, confining pressure, and material composition were studied using triaxial tests. Granuiometry was examined by varying both percentage of fines and maximum particle size. Segregation was evident. Results were compared to those calculated from observed performances of 7 dams. 883110
Aquif~ parmetm from the ~ respNR to pm#ng Kelly, W E Proc Nisat F.m~pmw Cmf~'eace oa Soil Mec/mmics F ~ ~ , GrmmdmUer EtO~s m Gcoteclmical ~ , D~d~, 31 A q - 3 Sept 1987 VI, P63-65. Publ Rotterdam: A A Bolkema, 1987 The impulse response of an aquifer is determined by differentiating the response for a constant rate pumping test. The liuearised form of impulse response yields values of transmissivity and storage ~ n t which compare well with those from other methods. The technique is illustrated by its implementation to analyse reported results for the recharge-recovery system at a hazardous waste site.
C ~ t y ,
See also: 883358, 883370 883111 Natuee of ~ in ~ Short eemmunkatien Jayawardane, N S; Grcacen, E L Agtt J Soll Res V25, t¢1, 1987, P107-113
Experimental work showed existing soil models, which are developed for extensively swelling soils, cannot be satisfactorily aPl~ed to moderately swelling soils. Modifications are suglpmed to the model of Fox (1964) to enable it to describe a soil where part of the water added contributes to swelling and the rest replaces air in pore space. m3112 PWe volmme ~
in a struetwtd nilt-lum ~
Wires, K C; Zebehuk, W D; Topp, G C Cam J ,~il Sei V67, N4, Nov 1987, P905-917 Shrinkage and volumetric water content of undisturbed cores from four horizons of a silt loam soil were monitored from saturation through to oven dry. Total shrinkage for the 4 horizons varied from 7,0-23.4%. Influence of soil structure on shrinkage was analysed. Water loss was partitioned between that repinoed by air and that associated with pore volume reduction. Results suggest that for comparison purposes, bulk demity and porosity be expressed at a reference water content or potential.
883113 Strength implications of the crystalline and osmotic sweifing of clays in shales. Technical note Seedsman, R W lnt J Rock Meek Min Sci V24, N6, Dec 1987, P357-363
The recognition of clay minerals occurring as stacks in shales has implications for the study of engineering behaviour of shales. Work to assess whether swell/shrink of clay stacks damages the fabric of shales and reduces tensile strength is outlined. Sample selection and preparation, strength testing procedures, and data analysis are described, ResUlts show statistically significant changes in strength, even with low levels of montmorilionite. Tests on crystalline swelling of clay minerals particles indicate the shale fabric is not rigid enough to prevent shrinkage of clay stacks, although the converse is true for osmotic swelling. Humidity levels may also be important in strain analysis. 883114 Thermal consolidation ~ l e l for Pelagic days Houston, S L; Lin Horn-da Marine Geoteeh V7, N2, 1987, P79-98
An analytical model to predict thermal primary consolidation, secondary compression and thermo-elastic expansion of saturated pelagic clays is developed. The model is based o n the results of triaxial and oneMimemional consolidation tests on clays over a temperature range of 4 deg C to 200 deg C. Model predictions correlate well with the results of an independent laboratory study. 883115 Voinmetric variations of clayey soils ~ drying-wetting cycles (In French) Biarez, J; Fleureau, J M; Zerhouni, M I; Soepandji, B S Re¢ Fr Geotech N41, 1987, P63-71
The behaviour of three clayey soils (loam, marl, kaolinite) during wetting.drying cycles has been exarained in the laboratory. Water content and volume change were ~ simUltaneously, and represented on a s~n-capillary ~ u r e - w a t e r content-saturation plane, which gives the c o ~ state of the material and, in particular, the ~ of saturation for different methods of sample preparation. C o ~ n between drying-wetting paths and oedometdic or i ~ compression-decompression paths shows an e q u i v a ~ between the effects of capillary and mechanical stresses. 893116 Comparlmn of COmlmt~l and actlml ~tthmmt of f o l m d a ~ built on fills Kushner, S G; Ginzburg, L K; Golovakha, V G Soil Meek Fmmd E q q V24, N2, March-April 1987, P66.71 Large industrial buildings were constructed on sand fills over highly to medium c o m ~ b l e wet silty-elayey soils, ~ t l e ments were calculated according to standard ~ and results were compared with ~ d ~ . ~ accuracy of the prediction method is evident. It is ~ , ha~ predicted the settlement, to modify conventional c o n ~ t i o n schedules advantageously. 883117
Pore p~mre ~
nmo fro.a ~
prol~m. T ~ d ~ l nae Yoshimi, Y Soils Fmmd V27, N3. Sept 1987. P88-90 It is shown that the ~ pressure diaipation ratio during nonlinear consolidation may be obtained from t l ~ theory without the need for numerical calculation. Mikasa theory is
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