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2015WinterShotcreteEMag

2014 Outstanding Pool & Recreational Project A Natural Look, an Exact Science By William T. Drakeley Jr. This article is based on the article “Country Comfort” by Bill Drakeley in the January 2015 issue ofAQUA magazine. Special thanks to Eric Herman, AQUA Senior Editor, for his contributions. Tcountry. In particular, the region is full of with the pool’s interior. in. (355 mm), creatingis set back from the edge 14a wet edge detail that visually blends the deckhis project is located in Duchess County, NY,an area defined by its horse and farm weekend homes for affluent professionals who The gutter itself is relatively small—6 in. work in New York City but escape to the comfort (150 mm) wide by 10 in. (250 mm) deep. Bather of the countryside on weekends and vacations. surge capacity is therefore handled by a large In this case, the clients were equestrian enthu- below-grade surge tank located downslope of the siasts who wanted to make the most of their vessel. A continuous plumbing loop surrounding approximately 100 acre (41 hm2) property, which the pool is fed by gravity, which in turn flows into features all sorts of jumping gates and horse trails the surge tank. A secondary circulation system scattered throughout. pulls water from the surge tank and pumps it back Drakeley Pool Company got involved at the to the pool to run the edge. suggestion of Eric Groft, a landscape architect with the firm Oehme Von Sweden (Washington, Excavation and Forming DC). Groft was working with John B. Murray The pool area is on a gentle slope of mostly Architects out of New York, who were both old fill—lots of rubble, sticks, and no compe- familiar with the company’s work and thought it tent soil. Because the material was completely would be a good fit for the project team. In addi- unsuitable for use as a form for shotcrete place- tion to Groft and the architect, lighting designers, ment, they had to over-excavate the site and build a sound designer, soils scientists, and a structural one-sided forms as if building an above-grade engineer were involved. That group also included structure. The downslope side of the pool is defined Dave Peterson of Watershape Consulting (Escon- architecturally by a retaining wall with the dido, CA), who took care of the hydraulic and remainder of the structure entirely below grade. system design. The forming was tricky. It had to be flexible enough to create the curvature but sturdy enough Design to prevent the structure from moving during the In many ways, the design is a terrific example plumbing and steel installation (not to mention of form meeting function. the later shotcrete process). If they didn’t get it The pool is big: 73 ft (22 m) long and 40 ft right, the wall could have been off by a couple (12 m) wide with a 9 ft (3 m) deep end. It features inches (mm), which is never acceptable. a large step treatment on the side adjacent to a Because of the perimeter overflow system, the pool cabana that echoes the undulating lines of top of the walls had to be formed with two precise the pool’s overall shape. The steps are 2 ft (0.6 m) top-of-beam details to create the 6 in. (150 mm) wide, large enough for entry and egress purposes wide gutter. In all, the gutter measures 36 in. as well as lounging, and are fitted with LED lights (450 mm) wide in its entirety. That meant for safe use after dark. very precise box forms had to be used to hold the The pool has a perimeter overflow detail that tolerance on the edge when we shot the shell. brings the water surface level with the deck, which augments the reflective qualities generated by the Site Preparation dark interior surface. After we over-excavated the pool by approxi- The original design called for 260 gpm mately 10 ft (3 m) all the way around, they brought (59 m3/h) over the edge to achieve complete cov- in soil, compacted it into place, and carved into it erage. The edge detail was so precise, however, to create the pool shape (Fig. 1 and 2). To help that the flow rate was ultimately cut in half and keep everything in place, they then applied a still wet the entire edge. The 1/2 in. (13 mm) slot sacrificial layer of concrete via the wet-mix shot- 26 Shotcrete • Winter 2015


2015WinterShotcreteEMag
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