Refurbishment | Grand remediation BAUER has been carrying out work in the Dominion Republic and Nepal


Top and above: Monte Grande Dam, diaphragm wall, Dominican Republic


THE MONTE GRANDE DAM in the southwest of the Dominican Republic is a key element of the country’s infrastructure and controls the Yaque del Sur River, provides flood protection, generates power, supports tourism and provides water for irrigation. The Dominican subsidiary of BAUER was commissioned in 2019 to construct a cut-off wall to seal off the dam base. By May 2020, BAUER had constructed around 26,000m2


over a length of 1350m,


down to an average depth of 23m and with a thickness of 800mm underneath the dam foundations. Then in May 2022, BAUER returned to the Monte Grande dam for Phase II which consisted of the construction of a reinforced diaphragm wall acting as


20 | September 2024 | www.waterpowermagazine.com


a flip lip for the dam spillway, protecting the toe of the dam from erosion. In total, 55 panels were installed with a thickness of 800mm. Panel lengths varied between 2.8m for a single-bite panel up to 7.1m for a triple-bite panel. A BAUER polymer-based stabilising slurry was used to assist the excavation work with two rope grabs. Depending on the requirements, different panel shapes were constructed including straight panels as well as L- and V-shaped panels. In total, 7828m2


of more than 320m was constucted. The excavation depth was 24.5m. Temporary flat steel stop-ends with installed water-bar made of rubber were used,


of diaphragm wall with a total length


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