Determination of the deformation modulus and unconfined compressive strength of jointed rock masses is a crucial and challenging part in rock mechanics and rock engineering. The empirical methods which are based on Rock Quality Designation provide a very convenient way for estimation of the deformation modulus and unconfined compressive strength of rock masses. In many cases, The Rock quality designation RQD is only available data about the discontinuity in the routine site investigation.
RQD is the only factor which affects the deformability and the strength of jointed rock mass. Rock-quality designation RQD is a rough measure of the degree of jointing or fracture in a rock mass, measured as a percentage of the drill core in lengths of 10 cm or more. 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. Based on the assessment of the condition of the rock, skin friction, and end bearing of the rock are calculated. These are made based on the test such as uniaxial compressive strength tests and based on the rock quality parameters such as RQD and Core Recovery.
Further, the socketing length of the rock is also based not only on the applied load but also on the quality of the rock. 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. Company k Plan shall have the meaning set forth in Section 6. To the extent the DS Supplier is a division or group of a company, the term DS Supplier Representative does not include any person in that company who is not part of the DS Supplier division or group. Virginia Stormwater Management Program or "VSMP" means a program approved by the board after September 13, , that has been established by a VSMP authority to manage the quality and quantity of runoff resulting from land-disturbing activities and shall include such items as local ordinances, rules, permit requirements, annual standards and specifications, policies and guidelines, technical materials, and requirements for plan review, inspection, enforcement, where authorized in the Act and associated regulations, and evaluation consistent with the requirements of the SWM Act and associated regulations.
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