Investigation of rock quality of Shirinrud dam site by engineering seismology

• Published in: Arabian journal of geosciences Vol. 6; no. 1; pp. 177 - 185
• Main Authors: Ghanbari, Yousef, Ramazi, Hamid Reza, Pazand, Kaveh, Madani, Nooshin
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 2013
• Subjects: Earth and Environmental Science; Earth Sciences; Original Paper; Refraction seismic; Rock mass quality; RMR; Shirinrud dam; Reciprocal method
• ISSN: 1866-7511; 1866-7538
• DOI: 10.1007/s12517-011-0322-7

At this paper, we studied about the rock quality of Shirinrud dam site by engineering seismology. Shirinrud dam site is located 80 km far from Kerman and 18 km far from Hojadk village. The dam and its constructions are established in the Bidu Formation which consists of seven rock units, and the refraction profiles were surveyed on Jb 3/2 , Jb 4 , and Jb 5 rock units. To evaluate the rock mass quality and basement topography at this site, nine refraction seismic profiles by primary waves and two refraction seismic profiles by secondary waves were surveyed. We used some methods such as Palmer method, the reciprocal method, plus–minus method, etc. to process and interpret data. Based on investigations, primary wave velocity in unit Jb 3/2 varies between 2,100 and 2,200 m/s, in unit Jb 4 is between 2,100 and 4,200 m/s, and in unit Jb 5 is between 2,500 and 3,000 m/s. The Q values on these three units are 0.05, 1.2, and 1.9, and the rock mass rating (RMR) values are 27.1, 40.5, and 33.5, respectively. With respect to wave velocity, Q , and RMR values, the units Jb 3/2 , Jb 4 , and Jb 5 are evaluated as very weak, intermediate, and weak, respectively.