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Measurement of dynamic soil characteristics
7O EMBANKMENTDRAINING BY THE DRAINAGE SPURS NETHO0. EVALUATION OF THE EFFICIENCY OF THE METHOD THROU6H THRIrE-DIMENSIONAL SIMULATION ANO EFFECT ON THE STABILITY. P. AIGLE, F. DESNOUVAUX J.P. PROST
Universit~ de Nancy France.
in Revue Franqaise de G~otechnique Nr. 36, third quarter 1986, 31-46 SUMMARY The authors analyse the efficiency of the drainage spurs method through numerous simulations obtained by using an electrical analog model. This o r i g i n a l l y designed analog model is well suited to define the location of water tables for two or threedimensional analysis. The simulations allow the shape of the surface of steady groundwater flows, induced by a series of parallel drainage spurs to be determined. These simulations have been performed for a very wide range of hypotheses, particularly for various embankment slopes and various distances of recharging boundaries. These simulations have led to the d e f i n i t i o n of parameters characteristic of the draining efficiency both from a hydraulic (scale of average water drawdown) and mechanical point of view (improved s t a b i l i t y ) . This analysis gives rise to the drawing of specific design charts.
MEASUREMENT OF DYN/~IC SOIL CHARACTERISTICS M.P LUONG
Laboratoire de M~canique des Solides, Ecole polytechnique. Palaiseau - France.
in Revue Franqaise de Gdotechnique Nr. 37, forth quarter 1986, 17-28. SUMMARY The paper reviews the different measurement techniques - in laboratory and in f i e l d - of deformation moduli and damping r a t i o , over a wide range of deformation amplitude being of interest for earthquake resistant designs of engineering structures. Laboratory methods : cyclic t r i a x i a l test resonance analysis Field methods : seismic tests forced vibration methods impact loading methods.
Universit~ de Nancy France.
in Revue Franqaise de G~otechnique Nr. 36, third quarter 1986, 31-46 SUMMARY The authors analyse the efficiency of the drainage spurs method through numerous simulations obtained by using an electrical analog model. This o r i g i n a l l y designed analog model is well suited to define the location of water tables for two or threedimensional analysis. The simulations allow the shape of the surface of steady groundwater flows, induced by a series of parallel drainage spurs to be determined. These simulations have been performed for a very wide range of hypotheses, particularly for various embankment slopes and various distances of recharging boundaries. These simulations have led to the d e f i n i t i o n of parameters characteristic of the draining efficiency both from a hydraulic (scale of average water drawdown) and mechanical point of view (improved s t a b i l i t y ) . This analysis gives rise to the drawing of specific design charts.
MEASUREMENT OF DYN/~IC SOIL CHARACTERISTICS M.P LUONG
Laboratoire de M~canique des Solides, Ecole polytechnique. Palaiseau - France.
in Revue Franqaise de Gdotechnique Nr. 37, forth quarter 1986, 17-28. SUMMARY The paper reviews the different measurement techniques - in laboratory and in f i e l d - of deformation moduli and damping r a t i o , over a wide range of deformation amplitude being of interest for earthquake resistant designs of engineering structures. Laboratory methods : cyclic t r i a x i a l test resonance analysis Field methods : seismic tests forced vibration methods impact loading methods.