Find the Rock Quality Designation of drilled rocks upon coring. Give the remarks on the quality of rock CORE RECOVERYCALCULATIONRQDCALCULATIONL= 250 mmL= 250 mmL=0Highly WeatheredDoes not meetSoundness RequirementL= 200 mmL=0CenterlinePieces < 100 mmand Highly WeatheredL= 250 mmL= 190 mmL= 190 mmL=0< 100 mmL= 60 mmL= 80 mmMechanical Breakcaused by Driing ProcessL= 200 mmL= 120 mmL = 0 mmL=0No RecoveryCore Run Total 1200 mm

RQD means Rock quality designation . It was introduced by Deere in 1964 Rock pieces less than 10 cm…

Answered: Find the Rock Quality Designation of…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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sand deposit has been identified beneath a site located adjacent to a river. The sand deposit is 15 feet thick and the top of the layer is 12 feet below the ground surface and overlain by a very stiff clay and is underlain by bedrock. The water level has been measured to be at a depth of 10 feet. The standard penetration resistance of the layer has been determined to be 12 blows per foot and a standard sampler was used; a drill rig with a safety hammer with an efficiency of 60% was used. The length of the drill rod is 10 meters and the borehole diameter is 5 inches (127 mm). The design earthquake has been designated as a moment magnitude 6-3/4 event on a nearby fault and the maximum ground acceleration is expected to be 0.40 g. The wet unit weight of the clay soils is 150 pounds per cubic foot and the wet unit weight of the sand soils is 180 pounds per cubic foot. The sands have 35% fines content according to a grain size analysis. Compute the factor of safety against liquefaction of…
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Earth Sciences Downward force is 4000 kg and rotational force is 3000 kg. Contact surface area (cross sectional area) is 100 cm2. Also, the rock sample (diameter: 20 cm) is tested by a uniaxial compressive strength machine and the sample was cracked at 30000 kg. Answer the following questions:a. Find the resultant force acting on the rock formation.b. Find the bearing strength of the rock drilled.c. Can we drill under these circumstances?
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