طبقه بندی ژئومکانیکی (RMR) توده‏سنگهای ساختگاه سد تنگوئیه سیرجان

Ali mohammad rajabi; M.sc in Engineering Geology

For investigate of engineering behavior of important projects such as dam and tunnel, it is essential to know rock mass properties of these sites.

A common method for rock mass analysis, is engineering classification of them. With rock masses classification of these sites to similar units, can perform essential actions for design and retainment.

In this paper presents effective parameters in geomechanical classification rock mass of Tanguyeh-Sirjan dam site.

These parameters are include of uniaxial compressive strength (UCS) of intact rock, rock quality designation (RQD) , and geomechanical properties of discontinuity.

With the study of the mentioned  parameters, has been performed geomechanical calssification (RMR) for rock masses of dam site and adjacent stractures. Results of these assessments Shows that rock mass rating for dam foundation rocks, Spillway, culvert tunnel, upstream and downstream cofferdam has been obtained ۳۵,۳۴,۳۶,۳۵ and ۲۴, respectively.

Based on these results, majority of units of mentioned rock masses are in poor and intermediate classes. one of the reasons for this case is intense tectonic action in this area