SPT blow count vs. shear wave velocity relationship in the structurally complex formations of the Molise Region (Italy)

被引:41
作者
Fabbrocino, Silvia [1 ]
Lanzano, Giovanni [2 ]
Forte, Giovanni [2 ]
de Magistris, Filippo Santucci [2 ]
Fabbrocino, Giovanni [2 ]
机构
[1] Univ Naples Federico II, DiSTAR Dept Earth Sci Environm & Georesources, I-80134 Naples, Italy
[2] Univ Moulise, DiBT Dept, Struct & Geotech Dynam Lab, StreGa, Campobasso, Italy
关键词
SPT-N; Shear wave velocity; Structurally complex formations; Empirical correlations; Seismic and geotechnical characterization; Molise (Italy); PENETRATION RESISTANCE; SOUTHERN; EVOLUTION; BASIN; UNITS;
D O I
10.1016/j.enggeo.2014.12.016
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The relationship between the shear wave velocity (V-S) and the blow number of the Standard Penetration Tests (N-SPT) was investigated with reference to the structurally complex formations located in a wide sector of the Southern Apennine chain (Molise Region, Italy). Novel N-SPT-V-S correlations were developed, based on a balanced number of in situ tests coming from the seismic microzonation of the municipalities of Campobasso District and the seismic vulnerability assessment of strategic road infrastructures. It was proven that available relationships were not able to fit the data in the area of interest, even making the analysis according to the soil grain size classification. This circumstance was related to the nature of the geological formations, which are chaotically built and affected by complex structural-textural and lithological characteristics. Hence, in this paper, a rational methodology for an integrated geological and geotechnical assessment of the available field data based on lithostratigraphical features was presented and discussed. Three original empirical N-SPT-V-S power function relationships were derived and distinguished depending on the main lithofacies recognized in the Campobasso District, corresponding to Structured Soil Deposit (SSD), All Soils (AS) and Weathered Soils (WS). Their validation through statistical assessment of data confirmed the relevance of the results and the advantages related to their use at regional scale, based on an integrated geological and geotechnical approach. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:84 / 97
页数:14
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