DeWind One-Pass Trenching installs world record 145' deep soil bentonite wall (SBW) with our new MT 4500 - T-4 compliant Trencher! Next Record attempt 155' .
Damn this thing is loud! (5000 hp will do that, haha) And they couldn't get the boom out right after they finished this section due to excessive leverage against the trencher's arm, but the way Dewind solved this issue was truely impressive. They fabricated a lifting device to attach too and run on the hydraulics of the trencher and were able to remove the boom from 145ft down, vertically, segment by segment. No assistance needed from a crane. The device used a directly vertical brace to minimize the bending moment and rely almost entirely on compression. These guys have some serious customization capabilities.
*_3 foot wide trench is big enough to use this trencher for slurry walls in foundation work._* When contractors are making underground foundations and parking garages for example, and the water table is high, special scoop mechanism digs trench and Bentonite is used to keep trench open until they pour concrete. The World Trade Center had the 'Bathtub' slurry wall which held up fairly well for the destruction that rained down on the walls. *_Traditional slurry wall trenching is slow. The Dewind could do it all in a day or two._*
Great video, I have a question, how does Dewind mobilize these machines to move from job site to job site, I’m sure the machines booms and mud plants must be disassembled and moved on Lowboys but what about the Base Machine itself do the have specialized heavy haul lowboys to move the base. machine or is the base machine also disassembled due to over weight then reassembled on site? No doubt they have large cost to mobilize and demobilize on top of MDOT Permits and fees to transport the equipment, what kinda time frame is it to assemble and disassemble is involved in transport of the specialized equipment?
They are injecting bentonite into the soil and mixing it with the trencher to make a groundwater impermeable underground wall. It can be used to prevent groundwater from getting into an area, or polluted groundwater from leaving it. A similar project was done on my property to stop water from getting through a levee.
They are digging a trench, pulling the soil from that trench, and mixing it with bentonite clay before reinjecting it. It can be used to control groundwater movement, like stopping polluted groundwater, or allowing an area to be dewatered to be more suitable for highly specialized building projects.
