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Design of laterally loaded driven piles using the flat dilatometer
259A 895242 Soluble salt damage to thin bituminous road and runway surfaces. Obika, B; Frecr-Hewish, g J; Fookes, P G
Q J Engng Gaol V22, NI. 1989, P59-73 A review of current knowledge of the damage caused by soluble salts to thin bituminous highway and runway surfaces in warm climates is presented. Recommended salt limits for materials in highway construction are discussed and other preventative and remedial measures outlined. A laboratory simulation of salt damage was carded out using climatic cabinets to identify the cause of salt damage to thin bituminous surfaces, This showed the importance of linking relationships and influences of geology, hydrogeology and construction practice with material and salt types, migration and crystallisation pressures, crystal properties, hydration/dehydration and climate in order to prevent damage occurring. Auth. 895243 In situ material characterisation of pavement-subgrade system Uddin, W; Stokoe, K H; Hudson, W g
Proc Eighth Asian Regional Conference on Soil Mechanics cued Foundation Engineering, Kyoto, 20-24 July 1987 VI, P419-422. Pubi Japan: Japanese Society for Soil Mechanics and Foundation Engineering, 1987 Dynamic deflection data measured during nondestructive testing are analysed to calculate Young's modulus for pavements and subgrades. Multilayered linear elastic theory is widely used in these calculations. Moduli from data from light load devices do not always predict pavement performance at higher traffic Ioadings, due to the nonlinearity of granular layers and subgrade soils. A method to correct these values for traffic loading is presented, which uses strain softening material models.
sea bed soils, and marine geotechnical investigations are next considered. Foundation design for gravity and jack up structures and offshore pile foundations are described. Finally, sea floor stability under marine and seismic loading, and its effects on offshore structures are examined. 895245 Design of laterally loaded driven piles using the fiat dilatometer Robertson, P K; Davies, M P: Campanella, R G
Geotech Test J VI2, NI, March 1989, P30-38 P-y curves (subgrade reaction method) are often used in design of laterally loaded piles. Most p-y curves are determined on an empirical basis, with little account taken of installation method. A preliminary, semi-empirical approach to determine p-y curves, based on flat dilatometer test (DMT) data is presented. Required equipment, technique, and theory are described. Resulting p-y curves are used as input for a finite difference program to predict pile deflection versus depth. Results are discussed in comparison with field test observations. 895246 Laterally loaded piles in a layered elastic medium Verruijt, A; Kooijman, A P
Geoteclmique I:39, NI. March 1989. P39-46 A simple model has been developed for the analysis of laterally loaded piles in a layered elastic medium. The model is described, and validated by comparison with results from 2 other continuum-based solutions, for a homogeneous elastic medium and a medium having elastic modulus proportional to depth. The method is illustrated for an inhomogeneous layered soil. The results of this and the comparisons indicate the model can be generalised to a layered system with soil properties varying arbitrarily with depth.
Foundations 895OO1
Influence of frost heave on houses under construction in Merthyr Tydfil Statham, I
Ground Engng V22, N2, March 1989, P31-33 Damage to buildings under construction during a period of freezing weather was thought to be due to frost action. Trial pits next to the foundations showed no signs of freezing, but pits under the floor inside the building showed freezing to 450ram. Old blast furnace slag of up to 20% fines had been used for the hardcore and had frozen, with prominent ice lenses. As a result the surface had heaved up to 30ram in places. To overcome the problem, the hardcore was replaced by non-frost susceptible material.
See also: 895027, 895090, 895097, 895098. 895104. 895230. 895244 Marine Geotechnies Poulos, H G
London: Unwin Hymen, 1988, 473P A textbook to assist those interested in the exploitation of offshore resources. The nature of the resources, types of offshore structure and the basics of marine geotechnology are first described. The nature of submarine soils, their behaviour under cyclic loading, analytical and laboratory examination of
©
895247 Rigid rectangular footing on an elastic layer Dempsey, J P; Li, H
Geotechnique V39, NI, March 1989, P!47-152 A solution for the contact problem of a rigid rectangular footing on an elastic layer under symmetric loading has been developed. The contact between the layer and the footing is assumed frictionless, and the lower surface of the layer is bonded to a rigid base. Results are compared with solutions in the literature for a rigid elastic footing on an elastic half space and a rigid strip on an elastic layer. 895248 Mechanically stabilized walls over soft clay:gensynthetic to prevent deep-seated failures Leshchinsky, D; Smith, D S
Geotext Geomem V7, N4, 1988, P309-323 Mechanically stabilised walls are often constructed on poor foundations. A high strength geotextile is placed at the claybackfill interface, to stabilise against deep seated failure where the potential slip surface passes through the unreinforced backfill and clay foundation. An analysis method and design tool to determine the required distribution of the tensile resistance of the reinforcing sheet is presented. It is based on the limit equilibrium method. Its predictions compare favourably with conventional methods and it is easy to use. Results are condensed as design charts.
1989 Pergamon Press plc. Reproduction not permitted
Q J Engng Gaol V22, NI. 1989, P59-73 A review of current knowledge of the damage caused by soluble salts to thin bituminous highway and runway surfaces in warm climates is presented. Recommended salt limits for materials in highway construction are discussed and other preventative and remedial measures outlined. A laboratory simulation of salt damage was carded out using climatic cabinets to identify the cause of salt damage to thin bituminous surfaces, This showed the importance of linking relationships and influences of geology, hydrogeology and construction practice with material and salt types, migration and crystallisation pressures, crystal properties, hydration/dehydration and climate in order to prevent damage occurring. Auth. 895243 In situ material characterisation of pavement-subgrade system Uddin, W; Stokoe, K H; Hudson, W g
Proc Eighth Asian Regional Conference on Soil Mechanics cued Foundation Engineering, Kyoto, 20-24 July 1987 VI, P419-422. Pubi Japan: Japanese Society for Soil Mechanics and Foundation Engineering, 1987 Dynamic deflection data measured during nondestructive testing are analysed to calculate Young's modulus for pavements and subgrades. Multilayered linear elastic theory is widely used in these calculations. Moduli from data from light load devices do not always predict pavement performance at higher traffic Ioadings, due to the nonlinearity of granular layers and subgrade soils. A method to correct these values for traffic loading is presented, which uses strain softening material models.
sea bed soils, and marine geotechnical investigations are next considered. Foundation design for gravity and jack up structures and offshore pile foundations are described. Finally, sea floor stability under marine and seismic loading, and its effects on offshore structures are examined. 895245 Design of laterally loaded driven piles using the fiat dilatometer Robertson, P K; Davies, M P: Campanella, R G
Geotech Test J VI2, NI, March 1989, P30-38 P-y curves (subgrade reaction method) are often used in design of laterally loaded piles. Most p-y curves are determined on an empirical basis, with little account taken of installation method. A preliminary, semi-empirical approach to determine p-y curves, based on flat dilatometer test (DMT) data is presented. Required equipment, technique, and theory are described. Resulting p-y curves are used as input for a finite difference program to predict pile deflection versus depth. Results are discussed in comparison with field test observations. 895246 Laterally loaded piles in a layered elastic medium Verruijt, A; Kooijman, A P
Geoteclmique I:39, NI. March 1989. P39-46 A simple model has been developed for the analysis of laterally loaded piles in a layered elastic medium. The model is described, and validated by comparison with results from 2 other continuum-based solutions, for a homogeneous elastic medium and a medium having elastic modulus proportional to depth. The method is illustrated for an inhomogeneous layered soil. The results of this and the comparisons indicate the model can be generalised to a layered system with soil properties varying arbitrarily with depth.
Foundations 895OO1
Influence of frost heave on houses under construction in Merthyr Tydfil Statham, I
Ground Engng V22, N2, March 1989, P31-33 Damage to buildings under construction during a period of freezing weather was thought to be due to frost action. Trial pits next to the foundations showed no signs of freezing, but pits under the floor inside the building showed freezing to 450ram. Old blast furnace slag of up to 20% fines had been used for the hardcore and had frozen, with prominent ice lenses. As a result the surface had heaved up to 30ram in places. To overcome the problem, the hardcore was replaced by non-frost susceptible material.
See also: 895027, 895090, 895097, 895098. 895104. 895230. 895244 Marine Geotechnies Poulos, H G
London: Unwin Hymen, 1988, 473P A textbook to assist those interested in the exploitation of offshore resources. The nature of the resources, types of offshore structure and the basics of marine geotechnology are first described. The nature of submarine soils, their behaviour under cyclic loading, analytical and laboratory examination of
©
895247 Rigid rectangular footing on an elastic layer Dempsey, J P; Li, H
Geotechnique V39, NI, March 1989, P!47-152 A solution for the contact problem of a rigid rectangular footing on an elastic layer under symmetric loading has been developed. The contact between the layer and the footing is assumed frictionless, and the lower surface of the layer is bonded to a rigid base. Results are compared with solutions in the literature for a rigid elastic footing on an elastic half space and a rigid strip on an elastic layer. 895248 Mechanically stabilized walls over soft clay:gensynthetic to prevent deep-seated failures Leshchinsky, D; Smith, D S
Geotext Geomem V7, N4, 1988, P309-323 Mechanically stabilised walls are often constructed on poor foundations. A high strength geotextile is placed at the claybackfill interface, to stabilise against deep seated failure where the potential slip surface passes through the unreinforced backfill and clay foundation. An analysis method and design tool to determine the required distribution of the tensile resistance of the reinforcing sheet is presented. It is based on the limit equilibrium method. Its predictions compare favourably with conventional methods and it is easy to use. Results are condensed as design charts.
1989 Pergamon Press plc. Reproduction not permitted