© Geotechnical Behaviour Of Saline Sabkha Soils Abduljauwad, SN; AlAmoudi, OSB THOMAS TELFORD SERVICES LTD, GEOTECHNIQUE; pp: ; Vol: 45 King Fahd University of Petroleum & Minerals Summary The behaviour of salt-cemented sabkha soil was investigated by considering the effect of brine and distilled water on its properties. Laboratory and field testing programmes were conducted to examine the effect of soaking and leaching on the structure, compressibility, collapse, permeability, load-carrying capacity and settlement of sabkha soil. Results indicate that the percolation of distilled water through the sabkha causes destruction of the natural cementation, leading to collapse, increase in permeability, reduction in strength and increase in settlement. Dissolution and leaching of halite, gypsiferous and calcarenite cements occur, leaving the quartz particles covered by a thin loose mat of illitic clay with large voids. The collapse deformation of sabkha is inclusively linked to the ambient salt complex, which determines the structural properties of the soil and promotes the development of collapse on wetting. The soaking of sabkha produces practically negligible collapse; leaching causes a significant collapse due to the softening, dissolution and effusion of salts from the soil skeleton. References: 1991, NATURAL BUILDING STO, V4 ABDULJAUWAD SN, 1993, GEOTECH TEST J, V16, P469 AKILI W, 1981, P S GEOT PROBL SAUD, V2, P775 AKILI W, 1981, Q J ENG GEOL, V14, P59 AKPOKODJE EG, 1985, Q J ENG GEOL, V18, P173 ALAMOUDI OSB, 1992, ENG GEOL, V33, P111 ALAMOUDI OSB, 1992, THESIS KING FAHD U P ALAMOUDI OSB, 1994, GEOTECH ENG J DEC ALAMOUDI OSB, 1994, J GEOTECH ENG-ASCE, V120, P1892 ALONSO EE, 1990, GEOTECHNIQUE, V40, P405 ALONSO EE, 1993, GEOTECHNICAL SPECIAL, V39, P103 Copyright: King Fahd University of Petroleum & Minerals;

© ALONSO EE, 1994, ENG CHARACTERISTICS, P173 ALSANAD HA, 1990, Q J ENG GEOL HYDROGE, V23, P357 BORCHET H, 1964, SALT DEPOSITS ORIGIN BURLAND JB, 1990, GEOTECHNIQUE, V40, P329 BUSH P, 1973, PERSIAN GULF BUTLER GP, 1969, J SEDIMENT PETROL, V39, P70 CHANG CS, 1990, GEOTECHNIQUE, V40, P251 COOP MR, 1993, GEOTECHNIQUE, V43, P53 CURTIS R, 1993, NATURAL LOND, V197, P6779 DEER WA, 1971, ROCK FORMING MINERAL, V5 ELNAGGAR ZR, 1988, P SHORT COURSE F ENG EROL AO, 1989, ENG GEOL, V26, P215 EVANS G, 1964, NATURE, V202, P385 EVANS G, 1969, SEDIMENTOLOGY, V12, P145 FOOKES PG, 1978, Q J ENG GEOL, V11, P33 FOOKES PG, 1985, Q J ENG GEOL, V18, P101 GLENNIE KW, 1970, DEV SEDIMENTOL, V14, P222 HOSSAIN D, 1988, Q J ENG GEOL, V21, P347 HSU KJ, 1973, PERSIAN GULF JAMES AN, 1978, GEOTECHNIQUE, V28, P249 JENNINGS JE, 1975, 6TH P REG C AFR SOIL, V1, P99 JOHNSON H, 1978, QUATERNARY PERIOD SA, P84 KAMAL MR, 1974, 2ND P AR C MIN RES R KINSMAN DJJ, 1966, 2ND P S ALT CLEV, P203 KINSMAN DJJ, 1968, 2ND P AM I MAT ENG R, P279 KINSMAN DJJ, 1969, AAPG BULL, V53, P830 KINSMAN DJJ, 1976, J SEDIMENT PETROL, V46, P273 LEONARDS GA, 1959, ASTM SPEC PUBL, V254, P116 LEVY Y, 1977, J SEDIMENT PETROL, V47, P463 MCKEEN RG, 1981, DOTFAARD8125 US DEP MILLER DJ, 1993, GEOTECHNICAL SPECIAL, V39, P64 PATTERSON RJ, 1981, AAPG BULL, V65, P1457 PAVILONSKII VM, 1979, T INTA VNII VODGEO, V74, P142 PETRUKHIN VP, 1993, CONSTRUCTION STRUCTU PURSER BH, 1973, PERSIAN GULF, P471 RENFRO AR, 1974, ECON GEOL, V69, P33 SAEEDY HS, 1990, ENG GEOL, V28, P27 SHEARMAN DJ, 1966, T I MIN METALL, V75, B208 SHEARMAN DJ, 1970, I MINING METALLURG B, V79, P155 SPANGLER MG, 1982, SOIL ENG STIPHO AS, 1985, Q J ENG GEOL, V18, P129 TAYLOR JCM, 1969, SEDIMENTOLOGY, V12, P69 TOLL DG, 1990, GEOTECHNIQUE, V40, P31 TUCKER ME, 1990, CARBONATE SEDIMENTOL WARREN JK, 1985, AAPG BULL, V69, P1013 Copyright: King Fahd University of Petroleum & Minerals;

© WEYL PK, 1958, J GEOL, V66, P163 WIGLEY TML, 1973, CAN J EARTH SCI, V10, P306 WOOD GV, 1969, SEDIMENTOLOGY, V12, P165 WOODBURN JA, 1993, GEOTECHNICAL SPECIAL, V39, P91 For pre-prints please write to: Copyright: King Fahd University of Petroleum & Minerals;