Pipe Installation

Good construction practices are critical in the proper installation of pipes. If good construction practices are not implemented, it may introduce deficiencies that can increase the potential of dam failure. Two components that are important to consider during construction are the bedding configuration and the pipe grade.

Bedding

For a concrete encased bedding configuration, the embankment is first excavated to create a large trench through the dam. Fill is then placed and compacted in the bottom of this large trench with heavy duty compaction equipment to the springline of the conduit. A small trapezoidal trench is then cut into the compacted fill. The pipe is placed on supports in this trench and the trench is filled with high-slump concrete to encase the bottom of the pipe. A low-slump concrete is then placed over the pipe to complete the encasement.

• Concrete Bedding Easier than Clay
• Importance of a Dry Trench During Construction with Concrete Cradle

Pipe Grade

Improper pipe grade can cause water to pond in conduits, which may accelerate the deterioration of a pipe.

• Pipe Grade

Note: The content on this page was originally created as part of DamOutletWorks.org (DOWL, 2018). It has subsequently been updated and reformatted as part of the Dam Safety Toolbox.
Revision ID: 4764
Revision Date: 12/02/2022