Olinda Channel Void Fill

Brea, CA

The Challenge

The 560 linear feet of undermined drainage channel had unknown voids, as city engineers avoided DCP testing to protect the moisture barrier.

The Solution

Injection tubes were installed at 45-degree angles on 4-foot centers, alternating injection depths of 5 and 8 feet to fill voids along the bottom of the drainage channel.

The Impact

Voids were successfully filled in the drainage channel, ensuring the long-term stability of the structure.

Location: Brea, CA

Project Type: Public Works

Repair Type: Void Filling

The Challenge

560 linear feet of the drainage channel was undermined.

A total of 560 linear feet of the drainage channel was undermined, with the full extent of the voids remaining unclear. City engineers declined to conduct Dynamic Cone Penetrometer (DCP) testing through the center of the channel to avoid damaging the moisture barrier, complicating the assessment of the damage. This limitation left uncertainty about the precise condition of the drainage system, requiring alternative methods to address the issue.

Key Facts

560 Linear Ft

Drainage Channel Undermined

0

Damage to Drainage Channel

0

Operational Interruptions

5-8 Ft

Injection Depths

The Solution

5-8′ injection tube installation to stabilize drainage channel.

Injection tubes were installed at 45-degree angles on 4-foot centers along the drainage channel to address the voids. To ensure comprehensive coverage, injection depths of 5 feet and 8 feet were alternated every 4 feet, allowing for the filling of any existing voids running along the bottom of the channel. This strategic approach helped stabilize the structure while preventing further erosion or damage.