Extension of dynamic consolidation

70A 872201 Lateral soil pressures and displacements of rigid piles in homogeneous soils under eccentric and inclined loads Sastry, V V R N; Meyerhol. G G Can Geotech J V23, .V3, Aug 1986. P281-286 Model tests were carried out on instrumented piles in clay and sand which were subjected to vertical eccentric and central inclined loads. Lateral pressures, tip load, and displacements were recorded. Test results are compared with theo~'. Reasonable agreement is found between measured and predicted displacements and suggested nondimensional p-y curves. The analyses are compared with results of some field records. 872202 Pull-out capacity of batter piles in sand. Note Hanna, A M: Afram. A Can Geotech Y ~23, N3. Aug 1986, P387-392 Axial pullout tests were carried out on instrumented model vertical and batter piles in sand. Good agreement was found between the results and Meyerhof's theory (1973). Pullout capacity of batter piles decreases slightly as pile inclination is increased. This is explained by means of a variable mobilized earth pressure on the pile perimeter. A design method and charts are presented. 872203 Approximate dynamic model of embedded foundation in time domain Wolf, J P; Somaini, D R Earthq Engng Struct Dynam VI4, N5, Sept-Oct 1986, P683703 Approximate engineering-type methods provide results of suitable accuracy without the high computational effort required for rigorous analysis in the frequency or time domain. A discrete model to represent the unbounded soil (half space) in the time domain has been developed. It is applied to the cases of a disc foundation, embedded cylindrical or prismatic foundations, strip foundations and a square foundation on a layered half space. 872204 Procedure for rod shear test Felio, G Y; Briaud, J L Geotech Test J vg, N3. Sept 1986, P133-139 A laboratory instrument, called the rod shear device, was developed to measure the shear transfer characteristics of a model pile inserted into a clay sample. The apparatus was designed to accommodate soil samples recovered from field investigations without extruding the specimen from its sampling tube, and thus avoiding disturbance caused by stress relief and handling. A rod shear testing procedure is recommended for monotonic and cyclic loading tests. Typical results are presented. Auth. 872205 Extension of dynamic consolidation Coupe, P S Ground Engng VI9, N6, Sept 1986, P14-21 The construction of a firm foundation in a swamp, using short, large diameter rock columns, for a 9m high embankment of the Johannesburg western by-pass freeway i s described. The production of these short, large diameter rock columns was accompanied by improvements in the strength and consolidation characteristics of the surrounding slimes materials, through the dynamic consolidation effects. The dynamic pounding significantly reduced the expected amount ~

of consolidation settlement while the rock columns improved markedly the overall stability of the completed road embankment• 872206 Review of the geotechnical aspects of jack-up unit operations Reardon. M J Ground Engng VI9, N7, Oct 1986. P21-26 The total geotechnical appraisal made prior to the emplacement of a jack-up offshore structure is described. Site investigation, calculation of installation and storm loadings and the assessment of foundation safety in marginal conditions are discussed. 872207 Uplift capacity of bored piles in calcareous soils Ismael, N F: AI-Sanad, H A J Geotech Engng Div ASCE VII2, NIO. Oct 1986. P928-940 The uplift capacity of bored piles in calcareous soils was examined by field tests at three sites in Kuwait. The nine test piles were 0.5m in diameter and extended to a maximum depth of 15m below the ground surface. The mobilized skin friction and the coefficient of lateral earth pressure were determined and compared with values obtained in noncalcareous sands. Test results were compared with empirical correlations relating the skin friction to the standard penetration test results. Analysis of test data indicates substantial load transfer similar to clean silica sand, with no reduction for the presence of carbonates with this method of construction. Auth. 872208 Stresses from loads over rectangular areas. Technical note Vitone, D M A: Valsangkar, A J J Geotech Engng Div ASCE Vl12, NIO, Oct I986, P961-964 Correct solutions based on Gray's work are presented and extended to the case of optimally designed rectangular footings subjected to biaxial bending with one corner having zero contact pressure. Formulas are provided to determine the vertical stress beneath the zero loaded corner and the diagonally opposite comer having the maximum soil pressure. A design example illustrating the use of the equations is given. 872209 Low tuned compressor foundations on soft clay Madshus, C; Nadim, F; Engen, A; Lerstol, A M Norw Geotech lnst Publ N161, 1986, I1P The design and testing of two low-tuned foundations for piston compressors at a site with soft sensitive clay and about 40m depth to bedrock are described. The foundation blocks are supported by four specially designed end bearing piles, which allow estimation of the foundation stiffness at very low vibration levels. The piles act as support for static loads and as spring elements to control the natural frequency of the foundations. 872210 Suction anchor model test studies (In French) -Fau, D; Raynaud, D Rev Fr Geotech N36, 1986, P55-68 The suction anchor, widely used for offshore structures, consists of a large diameter tubular pile with a closed upper end. Penetration resistance during insertion is reduced by lowering the hydrostatic pressure in the body of the anchor by using suction pumps. The suction anchor is proven and cost effective and may be re-used. Model tests in clays and silts, which were carried out to improve anchor design, are described.

1986 Pergamon Journals Ltd. Reproduction not permitted