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Pipe Fill Height Table (Trench Conditions)

Trench Loads
TRENCH LOADS ON CIRCULAR PIPE IN KN/M: NON-COHESIVE SOIL (GROUP NO 1 SANS 10102 PART 1); TRENCH WIDTHS SANS 1200 DB.



Notes:
For nominal pipe diameters = 1200mm the external diameter has been taken as 1.15 times the nominal diameter; for larger sizes 1.2 times the nominal diameter.
  • For non-cohesive soil, gravel or sand; density = 20kN/m and K = 0,19.
  • The table is based on the trench widths recommended in SANS 1200DB.
  • If the soil unit weight is known, the loads from the table may be adjusted as follows;.
    Load on pipe = load from table x unit weight of soil/20
  • This procedure valid only if the soil properties other than unit weight do not change.