Weep holes are incorporated into canal linings in order to _____________________?
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Answer: D. Have drainage facility
Explanation
Weep holes are drainage openings installed in canal linings and retaining walls to relieve hydrostatic uplift pressure. Allowing trapped groundwater to escape prevents dangerous backpressures from cracking or buckling concrete linings. These drainage ports protect civil engineering structures from failure caused by saturated foundation soils. Groundwater behind retaining walls and canal linings can exert immense uplift pressure when water tables rise. Weep holes are packed with filter material to allow water drainage while retaining surrounding soil particles. Geotechnical designers calculate spacing requirements for weep holes based on local soil permeability rates.
Civil engineers incorporate weep holes into canal linings, bridge abutments, and basement retaining walls. It matters because unreleased hydrostatic pressure causes concrete linings to heave, crack, and fail prematurely. Maintenance crews inspect weep holes regularly to ensure sediment blockages do not impair drainage function. Option A focuses on structural strength rather than relieving subsurface hydrostatic uplift pressures. Option B suggests anchoring against sliding, whereas weep holes actually reduce weight and pressure. Option C implies supplying water to branch canals, whereas weep holes serve strictly for drainage relief.
- Subject
- Agriculture
- Category
- Agriculture
- Topic
- —
- Difficulty
- medium
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