21.
Which rock mass classification system is widely used for tunnels?

22.
A cut slope in weathered granite should be:

23.
Which factor does NOT affect the choice of a construction site?

24.
For construction on hilly terrain, the most stable foundation material is:

25.
In road construction, which geological feature often leads to slope failure?

26.
Which method improves drainage and stability in slopes?

27.
What property of rocks is most relevant for assessing load-bearing capacity?

28.
Which geological factor is critical when building near a riverbank?

29.
During tunnel blasting, which rock type may create gas pockets and sudden collapse?

30.
For underground metro construction in urban areas, why is geotechnical borehole logging essential?

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