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Civil tools

Surface from survey points, alignments, earthworks quantities, drainage and retaining wall checks. SI units.

Criteria used for the pass and fail checks

These limits are yours to set. The starting values are generic round numbers, not any country's standard. Edit the JSON to match the standard your project follows. Set a field to null to skip that check.

Survey points

One point per line. Use a header row (for example id,easting,northing,elevation) or just x,y,z. Commas, tabs, semicolons and spaces all work.

Units Drop triangles with an edge longer than (m, optional)

Alignment

Uses the survey points from the first tab. Horizontal: one PI per line as x,y,radius (radius 0 for a sharp corner). Vertical: one PVI per line as station,elevation,curve length.

Horizontal PIs (x, y, radius) Vertical PVIs (station, elevation, curve length)

Road section

Lane width (m) Lanes Shoulder each side (m) Crossfall (%) Shoulder crossfall (%) Pavement thickness (m) Cut slope (H per 1 V) Fill slope (H per 1 V) Station interval (m) Fill factor Topsoil strip depth (m) Kerbs

Peak flow (rational method)

Runoff coefficient C Catchment area (ha) Rainfall intensity (mm/h) Flow path length (m, optional) Flow path slope (m/m, optional)

No rainfall data is built in. Use intensities from your site's records or design tables.

Pipe

Flow (m3/s) Slope (m/m) Manning n Diameter (mm, blank to select one) Max fill when selecting

Open channel

Flow (m3/s) Bottom width (m) Side slope (H per 1 V) Slope (m/m) Manning n

Box culvert

Design flow (m3/s) Clear width (m) Clear height (m) Length (m) Slope (m/m) Manning n Cells Earth cover over roof (m) Live surcharge (kPa) Wall thickness (m) Slab thickness (m)

Cantilever retaining wall

Stem height (m) Stem thickness at base (m) Stem thickness at top (m) Base width (m) Base thickness (m) Toe length (m) Backfill unit weight (kN/m3) Backfill friction angle (deg) Foundation friction angle (deg) Surcharge (kPa) Allowable bearing (kPa, optional)

Level backfill and Rankine earth pressure. No water, no seismic load, no passive resistance, no global slope check.