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Q: The rock reinforcement systems are used:
  • A. for constructing bridges on long rivers
  • B. in making of cofferdams
  • C. while casting foundations for high rise buildings
  • D. to add additional stability to rock runnels in which structural defects exist in the rock
Correct Answer: Option D - Rock Reinforcement system : It is used to add additional stability to rock tunnels in which structural defects exist in the rock. Types of rock reinforcement – (i) Rock bolt (ii) Rock Anchor - Passive type (iii) Rock dowel • Rock bolt : a. Grouted rock bolts b. Grouted cable bolts c. Friction anchor rock bolts e. Mechanically anchored rock bolts.
D. Rock Reinforcement system : It is used to add additional stability to rock tunnels in which structural defects exist in the rock. Types of rock reinforcement – (i) Rock bolt (ii) Rock Anchor - Passive type (iii) Rock dowel • Rock bolt : a. Grouted rock bolts b. Grouted cable bolts c. Friction anchor rock bolts e. Mechanically anchored rock bolts.

Explanations:

Rock Reinforcement system : It is used to add additional stability to rock tunnels in which structural defects exist in the rock. Types of rock reinforcement – (i) Rock bolt (ii) Rock Anchor - Passive type (iii) Rock dowel • Rock bolt : a. Grouted rock bolts b. Grouted cable bolts c. Friction anchor rock bolts e. Mechanically anchored rock bolts.