Shear Wave Velocity (Vs) and SPT Resistance (N) Correlation for the Isfahan Metro, Iran

Abstract

Abstract The evaluation of earthquake damage is a crucial problem for ground improvement, and it is dependent on the ground motion. The shear wave velocity determines the features of an earthquake motion at a location (Vs). Although the shear wave velocity profile at a location might not be easily accessible, the number of blows (N) from a standard penetration test (SPT) is. The establishment of a trustworthy connection between Vs, as determined by multichannel analysis of surface wave testing, and N, as determined by SPT at Isfahan Metro Line 2, is presented in this study. These tests have been run on a total of 22 boring logs (within a radius of 30 km). The index qualities of the SPT samples are examined in a lab setting. The study is crucial for this area since the resistance of the subway structure must be examined. An empirical correlation between Vs and N was created based on the statistical analyses. All soil types, sands only, and clay alone are treated individually in this manner. The established ties are comparable to those established for other sites around the world. Also, a comparison with relevant relations is provided. Given that ground motion is one of the key characteristics in seismic microzonation of the area, the proposed relations will be useful.