Il ya beaucoup de méthode directe pour effectuer les mesures vélocité de l'onde de cisaillement dans le sol: Down Hole, Cross Hole, SASW, MAWS, etc Parmi cette méthode, récemment, l'utilisation de la Sismique Dilatomètre Marchetti Tests (SDMT), afin de mesurer la vitesse des ondes de cisaillement profil, a été développé et utilisé en Italie. Ce test montre une bonne repro-ductibilité des mesures et la possibilité de connaître, dans le même temps, les caractéristiques mécaniques du sol dans le field. In statiques cet article certains sites italiens, sujets à haut risque sismique, ont été étudiés pour connaître le profil dynamique des sols, parmi eux STM M6 et San Giuseppe de la Rena sites à Catane et à San Giuliano di Puglia (PZ). Pour la caractérisation du site du site sol profond enquête-tions ont été également entrepris. Forages, SPT et dynamique dans les tests in situ ont été effec-tuées. down hole (DH), Sismique Dilatomètre Marchetti Tests (SDMT) et ondes de bruit Surface Analysis (NASW) ont été ré-alisées, dans le but d'évaluer le profil du sol de la vitesse des ondes de cisaillement (Vs). Les données disponibles ont permis de comparer la vitesse de cisaillement des vagues, obtenue par des corrélations empiriques, telles que celle donnée par EC8 avec les résultats des tests de fond de trou et sismique Dilatomètre Marchetti Tests. Une comparaison entre l'onde de cisaillement véloci-té mesurée par test in situ et que déduit par des tests en laboratoire à petite déformation, ont également été performed. The au-teurs suggèrent d'effectuer des essais in situ pour évaluer le profil de vitesse des ondes de cisaillement, notamment pour le sol en couches, et non que l'utilisation de la corrélation empirique et VS,30
There are many direct methods to perform the shear wave velocity measurements in the soil: Down Hole, Cross Hole, SASW, MAWS, etc. Among this method, recently the use of Seismic Dilatometer Marchetti Tests (SDMT), to measure the shear wave velocity profile, was developed and used in Italy. These tests shows good repeatability of the measurements and the possibility to know, at the same time, the mechanical soil characteristics in the static field.In this paper some Italian sites, prone to high seismic risk, were studied to know the dynamic soil profile, among them STM M6 and San Giuseppe la Rena sites in Catania and San Giuliano di Puglia (PZ). For site characterisation of soil deep site investiga-tions have been also undertaken. Borings, SPT and dynamic in situ tests have been performed. Down-hole (D-H), Seismic Dila-tometer Marchetti Tests (SDMT) and Noise Analysis Surface Waves (NASW) have been carried out, with the aim to evaluate the soil profile of shear waves velocity (Vs). The available data enabled one to compare the shear waves velocity, obtained by empirical correlations, such as that given by EC8 with the results of Down Hole tests and Seismic Dilatometer Marchetti Tests. A comparison between the shear wave veloc-ity measured by in situ test and that deducted by laboratory tests at small strain, have been also performed.The authors suggest to perform in situ test to evaluate shear wave velocity profile, particular for layered soil, rather than using empirical correlation and VS,30.
Shear Waves Velocity Measurements by Marchetti Seismic Dilatometer Tests
Cavallaro A;
2011
Abstract
There are many direct methods to perform the shear wave velocity measurements in the soil: Down Hole, Cross Hole, SASW, MAWS, etc. Among this method, recently the use of Seismic Dilatometer Marchetti Tests (SDMT), to measure the shear wave velocity profile, was developed and used in Italy. These tests shows good repeatability of the measurements and the possibility to know, at the same time, the mechanical soil characteristics in the static field.In this paper some Italian sites, prone to high seismic risk, were studied to know the dynamic soil profile, among them STM M6 and San Giuseppe la Rena sites in Catania and San Giuliano di Puglia (PZ). For site characterisation of soil deep site investiga-tions have been also undertaken. Borings, SPT and dynamic in situ tests have been performed. Down-hole (D-H), Seismic Dila-tometer Marchetti Tests (SDMT) and Noise Analysis Surface Waves (NASW) have been carried out, with the aim to evaluate the soil profile of shear waves velocity (Vs). The available data enabled one to compare the shear waves velocity, obtained by empirical correlations, such as that given by EC8 with the results of Down Hole tests and Seismic Dilatometer Marchetti Tests. A comparison between the shear wave veloc-ity measured by in situ test and that deducted by laboratory tests at small strain, have been also performed.The authors suggest to perform in situ test to evaluate shear wave velocity profile, particular for layered soil, rather than using empirical correlation and VS,30.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
