VISIT WEBSITE >>>>> http://gg.gg/y83ws?6079765 <<<<<<
Higher the RQD, the higher the quality of the rock. It could be due to the fractures in the rock and the rock quality is more toward the weathered zone. The above figure clearly indicates that the condition of the rock is not consistent.
Though it is expected to have a good quality rock, there are crack, discontinues, weathering, etc in the rock. It provides its results in the terms of percentage. Rock quality designation is also known as RQD.
It is a rough idea about the degree of either joining or breaking of the rock mass. It is evaluate as a percentage of the core barrel which is of length 10cm or more than that.
Though there are multiple definitions of RQD but D. Deere in released the most appropriate definition. It is the type of borehole core recovery percentage. RQD helps in covering those pieces which are solid from their core and are longer than the length of mm that is measured with the help of centreline of the core. Rock quality designation was deals with the cores of Its value helps calculate the support of the rock tunnels. RQD uses some of those systems that fulfill the requirement for the rock mass classifications.
Some of them are Q-system and the Rock Mass Rating system. After the calculation of the percentage of RQD, it helps in deciding the quality of the rock. RQD is used to evaluate quality of rocks such as degree and depth of weathering, zones of rock weakness and fracturing. This information is used for determining the depth of foundations, bearing capacity of rocks, settlement and sliding possibilities of foundations. RFQ helps in obtaining favorable tunneling conditions and evaluating the zones with poor quality rocks which may not support the engineering structures.
Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Rock quality designation RQD has several definitions. Hey, I am Krunal Rajput. The Man Behind CivilJungle. I started this site to spread knowledge about Civil Engineering. I am a Degree Holder in Civil Engineering. Your email address will not be published. Important Point. Short Note.
Comments