Pipe Laying Auto-Generation

Auto-generate design invert elevations from start elevation and slope ‰, then judge surveyed inverts and offsets.

Design invert = start elevation − slope×distance. Deviance = measured − design (mm). Invert elevation unit: mm.

Slope / auto-generation

Start chainage

Start invert elevation mm

Drain slope S ‰

Pipe length m

Segments

Invert elevation check

Location	Design invert	Measured invert	Deviance	Allow min	Allow max	Judging

Allow for D≤1000 unpressurized pipe: ±10 mm. Edit as needed.

Qualified points

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Total points

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Result

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Axis offset & joint offset

Location	Check item	Measured	Allow min	Allow max	Judging

Deviance = measured value. Axis offset (unpressurized, mm) ≤ 15; adjacent-joint offset ≤ 3.

Qualified points

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Total points

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Items: 管内底高程 (D≤1000 无压 ±10), 中线位移 (无压 ≤15), 相邻管内底错口 (≤3). Unit: mm.