Pipe Haunching

Definition

Pipe haunching is the area between the bottom of the pipe and the top of the pipe between the ditch sides.

Purpose

Pipe haunching provides additional support and stability to the pipe by filling the voids around the pipe with bedding material. This helps distribute loads and prevent the pipe from shifting or becoming damaged.

Examples of Use

• Sewer Installations: Haunching sewer pipes to ensure proper support and prevent settlement.
• Water Lines: Providing stability to water distribution pipes in trenches.
• Drainage Systems: Supporting drainage pipes to maintain alignment and function.

Related Terms

• Pipe Bedding: The layer of material that the pipe rests on.
• Backfill: Material used to fill the trench after the pipe is laid.
• Compaction: The process of densifying the haunching material to provide support.

Notes

• Materials: Common haunching materials include sand, gravel, and crushed stone, selected for their stability and drainage properties.
• Installation: Proper haunching involves compacting the material around the pipe to ensure it is fully supported and stable.