I need a help with modulus of elasticity and down
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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I need a help with modulus of elasticity and down.
Transcribed Image Text:During a site investigation, a boring was advanced to a depth of 10 m at which rock was encountered. The water table was never encountered during the investigation. The engineering geologist cored 5 m into the rock. The amount of recovered rock was 3.0 m in pieces of 10 cm or longer in length. An unconfined compression test was conducted on a specimen (area 50.3 cm²) of the rock core. The ultimate compressive breaking load was 50,505 kg. The strain at 50% of the unconfined compressive strength was equal to 0.0030 mm/mm.
Using an RQD value of 65% and unconfined compressive strength of 105 MPa, determine the Rock Mass Rating for the site where a slope is being evaluated using the following information. The spacing of the discontinuities were found to be 210 mm apart and consisted of slightly weathered, slightly rough surfaces separated by less than 1 mm. The rock mass is damp. The strike and dip orientations of discontinuities are considered favorable for a slope.
Based on the information given, provide the following quantities or descriptions. Round your calculations to the nearest whole number.
- Rock Quality Designation: 60
- Description of rock quality: fair
- Unconfined compressive strength: 1004
- Modulus of elasticity: __________
- Modulus ratio: __________
- Strength classification of the intact rock: __________
- Modulus of elasticity classification of the intact rock: __________
Rock Mass Rating:
- Class Number (report as an integer, e.g., 1, 2, 3, 4, 5)
- Description: __________
(Note: There are no graphs or diagrams present in the image.)
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