Tremie

Definition

A tremie is a large funnel with a tube attached, used to deliver concrete into deep forms or beneath water or slurry, slowing down the concrete and resisting segregation of the aggregates.

Purpose

The purpose of a tremie is to ensure the controlled placement of concrete in underwater or deep foundation applications, preventing the segregation of concrete aggregates and maintaining quality.

Examples of Use

1. Underwater Foundations: Tremies are used to place concrete for underwater bridge piers and other submerged structures.
2. Deep Piles: In pile foundations, tremies deliver concrete to the bottom of deep shafts, ensuring uniform placement.
3. Cofferdams: Tremies are used in cofferdams to place concrete underwater while preventing contamination and segregation.

Related Terms

• Grout: A mixture used to fill gaps or reinforce structures, often pumped through tremie tubes in certain applications.
• Slurry: A semi-liquid mixture, often used in conjunction with tremies to stabilize excavations.
• Casing: A tube or pipe used to support the sides of an excavation or borehole.

Notes

• Operation: Proper operation of a tremie is crucial to ensure that concrete is placed correctly and maintains its integrity.
• Maintenance: Regular inspection and maintenance of tremie equipment are necessary to prevent blockages and ensure functionality.