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Engineering significance of fold

Short answer

For dams, upstream-dipping beds are stable, downstream-dipping may slide. Tunnel roofs in anticlines are fractured; synclines collect water and have high pressure. Reservoirs: synclines hold water, anticlines leak. Slopes with outward-dipping beds risk landslides. Synclines form artesian basins, anticlines trap oil and gas.

Describe the engineering significance of fold.

  • Foundation and dams: dip direction of the limbs decides stability; beds dipping upstream are favourable for dams, while beds dipping downstream, with weak layers, may slide.
  • Tunnels: crest of an anticline is fractured and loosened (tension), while a syncline trough collects water and has high rock pressure; the best tunnel lines cross the fold axis at a high angle.
  • Reservoirs: a syncline holds water well, but an anticline can leak along the dipping limbs.
  • Slopes: beds dipping out of the slope produce landslides.
  • Water and oil: synclines form artesian basins; anticlines are traps for oil and gas.

✓ Answer checked by Claude Opus 5.5 (high effort)

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