Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Question
Chapter 17, Problem 17.15P
To determine
Find the recovery ratio and the rock quality designation and comment on the quality of rock.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Question 10 A 50 m run of core drilled horizontally from an underground drift allowed to recover 42 m ofrock core and 38 m of this core was in pieces longer than 100 mm. In the 4 m of recoveredrock core with pieces smaller than 100 mm, 2 meters contained fresh and sharp breaks(fractures).(a) Determine the Rock Quality Designation (RQD) value and the corresponding rock qualitydescription. (b) Describe the limitations of using RQD to evaluate rock quality and make suggestions onhow you can minimize the sources of error.
(b) Describe rock parameters that obtained from the following testing:
(i) Seismic Velocity test
(ii) Brazilian test
(iii) Slake durability test
(iv) Schidmt hammer test
(v) Triaxial Compression Test
(vi) Point load test
2. How to evaluate the rock properties according to the distribution curves and give at least two coefficients of that.
Chapter 17 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Knowledge Booster
Similar questions
- List FIVE factors that possibly affecting the rock testing results in the laboratory?arrow_forward1. Discuss the different criteria that is normally employed in the classification of metamorphic rock. (3-5 sentences or more) 2. Briefly explain the different exploration methods used to infer distribution of rocks underground from physical measurements made at the surface. (3-5 sentences or more)arrow_forwardA moist rock mass is characterized by the following parameters: joint water pressure is nil; the point load index 3 MPa; the joint spacing = 0.5 m; and = RQD 55%. Prepare a table of rock mass rating versus joint condition = using the terminology of Table 2.16 for the former and Table 2.13 for the latter. ( you can find the tables in goodman book about rock mechanics)arrow_forward
- Q3 (a) A core sample of granite was drilled at 1.5 m length at Muar. Based on the rock core sample as shown in Figure Q3(a), determine the Total Core Recovery (TCR), Solid Core Recovery (SCR) and Rock Quality Designation (RQD).arrow_forward1) A dry rock weighs 240 grams and has a bulk density of 2.5 grams per cubic centimeter. Whensaturated with pure water at room temperature (T = 25 °C), it weighs 255 grams. At room temperature,specific volume of water is 1.00295E-03 m3/kg. Calculate the porosity of the sample. 2) A cylindrical core sample of 1.5 cm length and 1.2 cm2cross-section has upstream and downstreampressures of 2 atm and 1.25 atm, respectively, during steady state flow of water at 1.00 g/s at roomtemperature. Calculate the permeability of the core. (Water @ 25 °C, viscosity = 1 cp, density of water = 0.997 g/cm3).arrow_forwardA reservoir-rock sample has a porosity of 0. 18 measured at 14.7 psis. The rock compressibility is0.77 X 10 5psi *.What would the rock porosity be at 2,000 and at 3,000 psis? Plot the relationship be tween ¢ and p in a pressure range of 14.7 to 5,000 psisarrow_forward
- Boreholes reveal that a thin layer of alluvial silt exists at a depth of 50 ft below the surface of the ground. The soil above this level has an average dry unit weight of 96 lb/ft3 and an average water content of 30%. The water table is approximately at the surface. Tests on undisturbed samples give the following data: cu = 1008 lb/ft2, undrained friction angle = 13°, cd = 861 lb/ft2, drained friction angle = 23°. Estimate the shearing resistance in psf of the silt on a horizontal plane when the shear stress builds up rapidly. with fbd a.2185 b.2449 c.861 d.3120arrow_forwardBoreholes reveal that a thin layer of alluvial silt exists at a depth of 50 ft below the surface of the ground. The soil above this level has an average dry unit weight of 96 lb/ft3 and an average water content of 30%. The water table is approximately at the surface. Tests on undisturbed samples give the following data: cu = 1008 lb/ft2, undrained friction angle = 13°, cd = 861 lb/ft2, drained friction angle = 23°. Estimate the shearing resistance in psf of the silt on a horizontal plane when the shear stress builds up SLOWLY a. 2185 b. 3120 c. 861 d. 2449arrow_forwardDiscuss the different criteria that is normally employed in the classification of metamorphic rock. (3-5 sentences)arrow_forward
- A rock core sample with a diameter of 47.6 mm and a length of 11.21 cm is loaded in uniaxial compressionThe difference in length and diameter recorded during testing are respectively 0.36 mm and 0.044mm for anaxial stress of 78 MPaCalculate the Elastic modulus (GPa) and Poison's ratio tor that rock snecimen.?arrow_forwardA saturated specimen of cohesionless sand was tested under drained conditions in a triaxial compression test apparatus and the sample failed at a deviator stress of 482 kN/m2 and the plane of failure made an angle of 60° with the horizontal. What would be the magnitude of the deviator stress in kPa at failure for identical specimen of sand if it is tested under a cell pressure of 200 kPa? Show diagramarrow_forwardA soil profile is shown in Figure P3.2 along with the standard penetration numbers in the clay layer. Use Eqs. (3.8) and (3.9) to determine the variation of cu and OCR with depth. What is the average value of cu and OCR?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Geotechnical Engineering (MindTap C...Civil EngineeringISBN:9781305970939Author:Braja M. Das, Khaled SobhanPublisher:Cengage Learning
Principles of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Fundamentals of Geotechnical Engineering (MindTap...Civil EngineeringISBN:9781305635180Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Principles of Geotechnical Engineering (MindTap C...
Civil Engineering
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Cengage Learning
Principles of Foundation Engineering (MindTap Cou...
Civil Engineering
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning
Fundamentals of Geotechnical Engineering (MindTap...
Civil Engineering
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning