![](/images/graphics-bg.png)
RQD range and the threshold value
Other Title(s)
مجال معلم جودة صخور و قيمة المرجع
Source
Journal of King Abdulaziz University : Earth Sciences
Issue
Vol. 5, Issue 1 (31 Dec. 1992), pp.109-122, 14 p.
Publisher
King Abdulaziz University Scientific Publishing Center
Publication Date
1992-12-31
Country of Publication
Saudi Arabia
No. of Pages
14
Main Subjects
Earth Sciences, Water and Environment
Abstract EN
The ROD is the easiest method of calculating the desingation of the rock masses for design purposes.
The threshold value of 100mm is used so far to calculate ROD, with no scientific or physical basis for choosing this value.
If the ROD calculation is based on this value it could give an ambiguous evaluation of the actual ROD of the rock mass in concern, and different threshold values could lead to different RQD's.
In this paper, various threshold values were chosen from 10mm to 100mm to calculate the effect of ROD using a written computer program utilizing Monte Carlo method.
The criterion used in the assessment of threshold value is its change with the ROD range which is defined as the difference between maximum and minimum ROD values that occur during a simulation of ROD by Monte Carlo technique.
The result appears as an inverse parabolic relationship between ROD range difference and the threshold value.
This research recommends use of a threshold value between 10mm to40mm to calculate the actual ROD of the rock mass which lead to a minimum expected error.
American Psychological Association (APA)
Sadaqah, Baha al-Din Hashim. 1992. RQD range and the threshold value. Journal of King Abdulaziz University : Earth Sciences،Vol. 5, no. 1, pp.109-122.
https://search.emarefa.net/detail/BIM-398549
Modern Language Association (MLA)
Sadaqah, Baha al-Din Hashim. RQD range and the threshold value. Journal of King Abdulaziz University : Earth Sciences Vol. 5, no. 1 (1992), pp.109-122.
https://search.emarefa.net/detail/BIM-398549
American Medical Association (AMA)
Sadaqah, Baha al-Din Hashim. RQD range and the threshold value. Journal of King Abdulaziz University : Earth Sciences. 1992. Vol. 5, no. 1, pp.109-122.
https://search.emarefa.net/detail/BIM-398549
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 120-121
Record ID
BIM-398549