[미국] 투과성 물질로 찰스(Charles)강 인근 친환경적 개발

매사추세츠 웰즐리(Wellesley)의 윌리엄스(Williams ) 거리에 있는 웨즐리 복합상업지구의 직장인들이 밖으로 나가기를 원하면, 그들은 편안한 자리가 있는 매력적인 야외 공간을 즐길 수 있다. 이제 그들은 바로 자연으로 나가서 Charles River의 전망을 감상할 수 있다.

“웰즐리의 지역 보전위원회인 웨틀랜드 보호위원회는 그 도로에 대한 계획을 승인해야 했다”며 “빗물이 유출되는 것을 최소화하기 위해 표면을 통해 빗물을 배출할 수 있는 투과성 물질이 필요했다”고 시설 기획 및 설계 디렉터인 댄 드리스콜(Dan Driscoll)은 말했다.

CRJA-IBI 그룹의 선임 연구원인 호레이스 아이크만(Horace Aikman)은 “길은 강에서 불과 50~75 피트이고, 구역은 홍수 지대에 있다”며 “침투성 및 걷는 표면의 편안함과 안정성 외에도, 정기적인 범람을 막을 수 있는 강력한 포장 재료가 필요했다”고 말했다.

Porous Pave XL은 재활용 고무칩 50%와 화강암 골재 50%로 만들어졌다. 강수는 평방 피트 5천800~6천300 갤런 속도로 다공성 포장재를 통해 흐른다. 호우 동안 표면에 웅덩이가 생기지 않는다. 재설 후에는 녹은 물이 얼어서 얼음이 쌓이지 않고 물질 속으로 침투한다.

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PERMEABLE PAVEMENT PROVIDES ENVIRONMENTALLY FRIENDLY SOLUTION FOR ACCESS TO SENSITIVE AREA NEXT TO THE CHARLES RIVER IN WELLESLEY, MASSACHUSETTS

When office workers at the Wellesley Office Park on Williams Street in Wellesley, Ma., want to get outside, they can enjoy attractive outdoor areas with comfortable seating. Now they can also get right out into nature and take in views of the Charles River as they stroll along the new half-mile long Wellesley Office Park Walking Path. Constructed with the financial support of the John Hancock Real Estate Finance Group on land owned by the Massachusetts Department of Conservation and Recreation, the path is accessible to the public as well. To protect the ecologically sensitive area, the path was installed with 20,000 square feet of Porous Pave XL. An eco-friendly green building product made in the U.S.A., Porous Pave is a highly porous, durable and flexible pour-in-place paving material. It provides a comfortable and safe path through the woods without compacting the underlying soil or increasing runoff to the river.

"The Wetlands Protection Committee, the local conservation commission in Wellesley, had to approve plans for the path," said Dan Driscoll, director, Recreation Facilities Planning and Design, Department of Conservation and Recreation. "They required a pervious material that allows rainwater to drain through its surface to minimize runoff."

"The path is only 50-75 feet from the river, and sections are in a flood zone," said Horace Aikman, senior associate, CRJA-IBI Group (Boston, Ma.), the landscape architecture firm that designed the path. "In addition to permeability and walking surface comfort and safety, we needed a strong paving material that can hold up against periodic flooding."

Porous Pave XL is made from 50 percent recycled rubber chips and 50 percent chipped granite aggregate. Stormwater flows through Porous Pave at a tested rate of 5,800 - 6,300 gallons per hour per square foot, leaving no puddles on the surface even during heavy rains. With its recycled rubber content, the material is freeze and frost-heave resistant for durability and provides significant traction. It is tough enough to be shoveled or plowed in winter. After snow removal, residual melted water permeates down into the material rather than freezing and forming ice on top.

"In July 2016, we installed two inches of Porous Pave on a base of six inches of 3/4-inch crushed gravel," said Trevor Smith, lead designer, Land Escapes Design Studio (Belmont, Mass.), the landscape company that installed the path. "The brown color selected for the project harmonizes the paved path with the natural landscape."

"If we want people to care about nature, they need opportunities and places to experience it," said Smith. "The challenge is giving people access to natural areas with minimal disruption. The Wellesley Office Park Walking Path accomplishes that. It turned what had been a beautiful but isolated section of land along the Charles River into an accessible natural area with little or no effect on the area's delicate hydrology."

"Scrap tires are shredded and processed into chips of recycled rubber that go into our product," said Dave Ouwinga, president, Porous Pave Inc. "The Wellesley Office Park Walking Path is the biggest installation of Porous Pave to date in New England. The amount used for the half-mile long path includes rubber recovered from about 5,000 – 6,000 old tires. That is a bonus benefit for the environment."

[출처 = Water World / 2016년 11월 15일]