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Computing the lateral load on pile groups from the model of a linearly deformable half space
329A 896323 Bearing capacity of footings adjacent to slopes Saran, S; Sud, V K; Handa, S C J Geotech Engng Div ASCE VIIS, N4, April 1989, P553-573 Analytical solutions have been developed to obtain ultimate bearing capacity of footings adjacent to slopes, using limit equilibrium and limit analysis approaches. The solutions consider one-sided failure. The 2 methods give almost identical values and show reasonable agreement with model test data. Results from the analyses are presented as dimensionless charts. 896324 Behaviour of foundation clays supporting compliant offshore structures Malek, A M; Azzouz, A S; Baligh, M M; Germaine, J T J Geotech Engng Die ASCE VllS, N5, May 1989, P615-636 Large cyclic shear stresses are imposed on foundation soils by piles supporting offshore structures. Direct simple shear tests were carried out on normally consolidated Boston Blue Clay to study the behaviour of foundation clays during undrained storm loading conditions. Using values derived, a simplified method was developed to predict behavioural aspects of shaft performance for a rigid rough cylindrical pile subjected to static and cyclic loading conditions imposed by tension leg platforms. 896325 Soil Reaction stresses on offshore gravity platforms Lacasse, S; D'Orazio, T B Norw Geotech lnst Publ N178, 1989, 23P Research into soil reaction stresses on offshore gravity platforms is presented. The computer programs, platform geometries and models, loading conditions and soil models used are described. Various resulting stress distributions are presented, including sharing of horizontal load between skirt system and platform base, sharing of loads amongst skirts, stress distribution on individual skirts due to vertical, horizontal and moment loading, and contact stresses on the platform base. 896326 Determination of the depth of the deformation zone in the beds of annular foundations Yudin, V A; Kushchak, S I Soil Mech Found Engng V25, N4, July-Aug 1988, P141-144 The settlement of annular foundations is affected by the depth of the deformation zone compressive stratum. This is evaluated for both single and multilayer beds in the form of bearing columns whose planform dimensions coincide with those of the bottom surface of the annular foundation. The basic factors influencing the depth of the deformation zone are area of the foundation lower surface, pressure, ratio of inside to outside radius (Ri:Ro), and soil properties, density, cohesion, and friction angle. A minimum Ri:Ro of 0.4 is recommended. 896327 Experimental investigation of the effect of the bending stiffness of reinforced-concrete piles under load Dovgii, A N; Lekumovich, G S; Luchkovskii, I Y Soil Mech Found Engng V25, N4, July-Aug 1988, P145-149 Experimental tests were carried out to investigate the crack forming process in reinforced concrete piles and the induced change in bending stiffness. Stepwise increasing lateral loads
were applied at ground level to instrumented driven steel and reinforced concrete piles, embedded at 2.75m. Bending moments along the piles were evaluated. Despite similar initial stiffnesses, changes were evident as loading increased and the flexibility of the concrete pile increased. This exerts a significant influence on the performance of the pile-soil system, which should be considered at the design stage.
896328 Computing the lateral load on piles and pile groups from the model of a linearly deformable half space Fedorovskii, V G; Kurilio, S V; Kulakov, N A Soil Mech Found Engng V25, N4, July-Aug 1988, P166-172 Piles in groups behave differently from single piles because of pile-pile interactions, and loading and displacements are nonuniform. An analysis of the behaviour of a group of circular, vertical piles in a linearly deformable half space and subject to horizontal loading is presented. Load-displacement and bending moment distribution curves are evaluated for the cases of interaction and no interaction for a range of geometries and stiffness parameters for the pile and soil. Results are discussed.
896329 Experimental studies of slotted foundations for the supports of high-voltage lines Kuzma, I; Nikitenko, M I Soil Mech Found Engng V25, N4, July-Aug 1988, P176-180 Prismatic monolithic foundations are used for power lines in Czechoslovakia. Rectangular holes are dug using hydraulic grab buckets and high pressure concrete injected, offsetting any soil loosening effects and increasing concrete shear resistance along the lateral edges of the foundation. Inclined loading, full scale pullout tests are reported. Effects of load inclination, sand density, surface roughness and foundation geometry on bearing capacity are described.
896330 Model tests and analyses of laterally loaded pile groups Shibata, T; Yashima, A; Kimura, M Soils Found V29, NI, March 1989, P31-44 Lateral loading tests were carried out on model piles to study various parameters such as pile spacing, number of piles, pile arrangement and pile rigidity. The soil was prepared by the boiling method to ensure homogeneity. The results are compared with predictions made using Randolph's analysis, showing reasonable agreement. Randolph's analysis was then applied to full scale group piles in a pile foundation, showing a large discrepancy between theoretical values and the existing road manual's design method for group efficiency and displacement of pile tops.
896331 Elastic analysis for piled raft foundations in a homogeneous soil Kuwabara, F Soils Found V29, N1, March 1989, P82-92 A boundary element procedure has been developed to analyse the behaviour of piled raft foundations where the raft is resting on a homogeneous isotropic elastic half-space soil. The method is applied to a group of identical piles arranged in a square configuration. Results are discussed in terms of settlement of pile groups and load transfer from foundation to soil.
© 1989 Pergamon Press pie. Reproduction not permitted
were applied at ground level to instrumented driven steel and reinforced concrete piles, embedded at 2.75m. Bending moments along the piles were evaluated. Despite similar initial stiffnesses, changes were evident as loading increased and the flexibility of the concrete pile increased. This exerts a significant influence on the performance of the pile-soil system, which should be considered at the design stage.
896328 Computing the lateral load on piles and pile groups from the model of a linearly deformable half space Fedorovskii, V G; Kurilio, S V; Kulakov, N A Soil Mech Found Engng V25, N4, July-Aug 1988, P166-172 Piles in groups behave differently from single piles because of pile-pile interactions, and loading and displacements are nonuniform. An analysis of the behaviour of a group of circular, vertical piles in a linearly deformable half space and subject to horizontal loading is presented. Load-displacement and bending moment distribution curves are evaluated for the cases of interaction and no interaction for a range of geometries and stiffness parameters for the pile and soil. Results are discussed.
896329 Experimental studies of slotted foundations for the supports of high-voltage lines Kuzma, I; Nikitenko, M I Soil Mech Found Engng V25, N4, July-Aug 1988, P176-180 Prismatic monolithic foundations are used for power lines in Czechoslovakia. Rectangular holes are dug using hydraulic grab buckets and high pressure concrete injected, offsetting any soil loosening effects and increasing concrete shear resistance along the lateral edges of the foundation. Inclined loading, full scale pullout tests are reported. Effects of load inclination, sand density, surface roughness and foundation geometry on bearing capacity are described.
896330 Model tests and analyses of laterally loaded pile groups Shibata, T; Yashima, A; Kimura, M Soils Found V29, NI, March 1989, P31-44 Lateral loading tests were carried out on model piles to study various parameters such as pile spacing, number of piles, pile arrangement and pile rigidity. The soil was prepared by the boiling method to ensure homogeneity. The results are compared with predictions made using Randolph's analysis, showing reasonable agreement. Randolph's analysis was then applied to full scale group piles in a pile foundation, showing a large discrepancy between theoretical values and the existing road manual's design method for group efficiency and displacement of pile tops.
896331 Elastic analysis for piled raft foundations in a homogeneous soil Kuwabara, F Soils Found V29, N1, March 1989, P82-92 A boundary element procedure has been developed to analyse the behaviour of piled raft foundations where the raft is resting on a homogeneous isotropic elastic half-space soil. The method is applied to a group of identical piles arranged in a square configuration. Results are discussed in terms of settlement of pile groups and load transfer from foundation to soil.
© 1989 Pergamon Press pie. Reproduction not permitted