Haul roads

Granular haul road thickness on cohesive ground, unreinforced or with one geogrid.

The tool assists — the responsible engineer checks and approves.

Project name

Company (shown on the calculation note header)

Calculation ref

Revision

Designer (TWD)

Checker

Axle spacing in a bogie (leave blank for a single axle)

0.5 – 10 m · optional, blank = automatic

Heaviest single axle load

10 – 1000 kN

Tyre inflation pressure

200 – 900 kPa

Passes of the design axle

100 – 100000 No.

Subgrade type

Subgrade strength from

Undrained shear strength cu (characteristic, worst season)

1 – 500 kPa

Source of the subgrade strength

Groundwater depth below formation

0 – 10 m

Working season

Factor of safety on bearing FS

1.5 – 2.5

Allowable rut depth

40 – 100 mm

Aggregate fill

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