The Q-Slope Method for Rock Slope Engineering

Bar, Neil; Barton, Nick

doi:10.1007/s00603-017-1305-0

Cited by 114 publications

(115 citation statements)

References 6 publications

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“…In many rock slope problems, the engineer needs to rapidly decide whether the slope will be excavated at angles of 45 to 90° or even shallower than 45° [5]. The use of Q-slope during excavation can help to reduce maintenance and bench-width needs due to all the potential failures.…”

Section: The Q-slope Methods For Rock Slope Engineeringmentioning

confidence: 99%

“…Q-slope utilizes the same six parameters RQD, J n , J r , J a , J w and SRF [5]. However, the frictional resistance pair J r and J a can apply, when needed, to the individual sides of potentially unstable wedges.…”

Section: The Q-slope Methods For Rock Slope Engineeringmentioning

confidence: 99%

“…Table 8 describes strength reduction factors (SRF b ) for adverse stress and strength ranges in the slope. SRF b becomes more critical for weak, low strength materials such as highly weathered and saprolitic rocks [6], and also becomes more critical with increasing slope height [5], and therefore, with increasing stress. In both these instances, the stress and strength factor (SRF b ), has a tendency to dominate.…”

Section: Strength Reduction Factormentioning

confidence: 99%

“…The presence of major discontinuities, their orientation and mechanical characteristics, will often dictate the stability of stronger materials, for both small and large slope heights [5].…”

Section: Strength Reduction Factormentioning

confidence: 99%

“…The discontinuity orientation factor (O-factor) described in Table 5 provides orientation adjustments for discontinuities in rock slopes [3] [5].…”

Section: Discontinuity Orientation Factormentioning

confidence: 99%

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Rock Slope Design using Q-slope and Geophysical Survey Data

Bar

Barton²

2018

Period. Polytech. Civil Eng.

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IntroductionAssessing the stability of rock slope cuttings and benches in real-time, as excavations progress and ground conditions become apparent, using analytical approaches such as kinematics, limit equilibrium or finite and discrete element models is practically impossible in both civil and mining engineering projects. The rate of excavation is too fast for this. The same limitation usually applies to tunneling, although large underground openings (e.g. caverns) are sufficiently stationary for thorough and more necessary analysis, and the same applies to high rock slopes.Several empirical methods for assisting rock engineering design have been developed in the last 50 years and are used for a variety of applications by rock engineers and engineering geologists, primarily for tunneling and support of underground excavations. In the case of rock slopes, some empirical methods predict support, reinforcement and performance of excavated slopes. However, aside from Q-slope, no empirical rock engineering methods provide guidance in relation to appropriate, long-term stable slope angles in which reinforcement and support is deliberately absent. Such slopes actually dominate the demand by a huge margin.

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Section: The Q-slope Methods For Rock Slope Engineeringmentioning

confidence: 99%

Section: The Q-slope Methods For Rock Slope Engineeringmentioning

confidence: 99%