This code provides guidelines for the design and construction of masonry structures used in irrigation and drainage systems. It covers material specifications, design considerations like stability and permissible stresses, and construction practices for assets such as canals, regulators, and aqueducts.
Provides guidelines for the design and construction of masonry structures used in irrigation and drainage works.
Quick Reference Values
Minimum crushing strength for bricks in canal lining75 kg/cm²
Maximum thickness of mortar joint for brickwork10 mm
Permissible compressive stress for M100 brick in M1 mortar1.05 N/mm²
Minimum curing period for masonry7 days
Minimum factor of safety against overturning1.5 (Reservoir empty) / 2.0 (Reservoir full)
Minimum factor of safety against sliding1.5
Key Formulas
σ_ca,cal / σ_ca + σ_bt,cal / σ_bt ≤ 1.0 — Combined axial and bending stress check
Practical Notes
Special attention must be paid to the quality of mortar and proper curing, as these are critical for the durability and water-tightness of hydraulic structures.
The stability analysis against overturning, sliding, and bearing pressure is the most critical aspect of designing gravity structures under this code.
Ensure provision of adequate weep holes and drainage arrangements behind retaining structures to prevent build-up of hydrostatic pressure.