
handle: 11441/88150
El cambio de volumen de los suelos parcialmente saturados depende fuertemente de la trayectoria de las tensiones. Un estudio comparativo de trayectorias tensión-deformación en el laboratorio e in situ permite escoger las trayectorias tensión-deformación de cálculo apropiadas. En el laboratorio se han llevado a cabo varios cientos de ensayos sobre muestras inalteradas y compactadas. Se ha desarrollado un método de elementos finitos tridimensional para el cálculo de cualquier tipo de cimentación sobre suelo expansivo o colapsable. Este método ha sido aplicado a la cimentación de edificios instrumentados usando diferentes hipótesis y trayectorias de las tensiones de cálculo: las trayectorias tensión-deformación resultantes in situ han sido analizadas y comparadas con las de cálculo.
The volume change of partly saturated soils is strongly path-dependent. A comparative study of laboratory and in situ stress-strain paths allows to choose the appropriate calculation stress-paths. At the laboratory several hundreds of tests on undisturbed and compacted samples hace been carried out. A three-dimensional finite element method for the calculation of any type of foundation on expansive or collapsing soils has been developed. This method has been applied to the foundation of instrumented buildings using different hypotheses and calculation stress-paths: the resulting in situ stress-strain paths have been analyzed and compared with the calculation ones.
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