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2016SpringShotcreteEMag

Goin’ Underground Fig. 6: Schwing S17 with 180-degree discharge serves as line pump for shotcreting up to 400 ft (120 m) inside the tunnel Wet-mix shotcrete pumping was handled by Brundage-Bone from their Springfield location. “We have pumped steadily every day in March, April, and May,” Mitchell said. “The Brundage operators have been great and most of the time, the Springfield District Manager, Andy Baugh, is on-site to lend a hand.” The company has been using several of their pumps on the project, including a Schwing S17 boom pump discharging directly out the back, an SP 500, and an SPT 1000 truck-mounted pump (refer to Fig. 6). All pumps are equipped with fast-switching Rock Valves for surge-free operation at the hose. Pumping distances have exceeded 400 ft (120 m) with a line diameter at 2 in. (50 mm) where it enters the shotcrete nozzle. “At the end of the day, we wash out the 2 in. (50 mm) hose and blow out the 3 in. (75 mm) line back to the pump,” explained Mitchell. “Being that far from the pump, I need to trust the operator and Brundage-Bone’s crew is real good. I don’t feel like I have to look over my shoulder.” Mitchell hand-formed 200 recesses for light fixtures, with some 8 in. (203 mm) deep. “There is an art to forming the arches and recesses for dramatic shadows,” explained Mitchell. “For utilitarian purposes, we can leave a naturally coarse finish, but this wine cave will be enjoyed by the owner and his guests so some rooms will have a smooth finish and some will be covered in plaster or woodwork.” A chandelier in the tasting room will appear like a tree root growing through the ceiling. The wine library houses the bottles in racks with sufficient lighting to easily read the labels. Wine of sufficient potential will be sourced and the barrels aged in the cave to be rotated every few months so the sediment can be drawn off. After a couple of years of barrel aging, the wine will be blended and bottled. Humidity will be carefully controlled. For Mitchell, a 40-plus-year veteran of the wine industry (he began cleaning tasting rooms at 13), it is a satisfying construction career in an area not many people have chosen. “Most of the people in the wine cave industry know each other,” explained Mitchell. “I have poured more than a million square feet of cave floors in my career. I still have a 1986 Schwing BP 750-15 back in Napa that pumped most of those cave floors and it still works fine.” Mitchell will add to his cave floor square footage when he pours the cave floors with Brundage-Bone pumps later this year. Jason Zignego, Sales Manager, Stationary Pumps, with Schwing America, St. Paul, MN, is a 20-year employee of Schwing. He started in the company as a Sales Assistant and became Sales Manager 5 years ago. He is a hands-on specialist, having worked with shotcrete pump applications his entire career. He is always available to answer any questions regarding wet shotcreting with Schwing stationary pumps; contact him at Jzignego@schwing.com. Project Details Excavation Bacchus Caves The Woodlands, TX Engineering Brierley Associates Denver, CO Architects Slone and Associates Springfield, MO Cave Finishing Contractor Brady Mitchell Napa, CA Pumping Equipment Schwing S17 SP 500 stationary pump SPT 1000 truck-mounted pump 48 Shotcrete • Spring 2016


2016SpringShotcreteEMag
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