Cutoff Wall Connections to Existing Large Diameter Pipes-Video

Video Transcription

Video Summary

The presentation describes Bauer’s solution for crossing two 40-inch steel pipes and a 96-inch corrugated metal pipe (CMP) with a cutoff wall during the Herbert Hoover Dike rehabilitation project in Florida. The original jet-grouting concept required oversized columns and risked damaging the aging, leaking CMP; working inside it also raised safety concerns. Bauer proposed excavating around the pipe, installing jet-grout columns beneath it, restoring the pipe, backfilling with controlled low-strength material, and tying the work into the cutoff wall with cutter soil mixing panels.<br /><br />The work required a braced temporary excavation, dewatering, and a bypass system to maintain water flows. After installing the columns, the crew repaired the CMP, placed flow fill in controlled lifts, completed inaccessible columns through reservation pipes, and connected the new work to the existing wall. The presenter says the solution provided a safe, high-quality connection and was completed on time and within budget.

Keywords

Bauer

jet grouting

cutoff wall

corrugated metal pipe

Herbert Hoover Dike