Environmental

Our environmental solutions have been developed to benefit our communities while helping clients reduce their carbon footprints, thus building a better tomorrow for all.

Eco-tank

Eco-tank is an underground, pre-cast water storage system that holds large volumes of water in the event of storms, which can then be utilised for greening projects at a later date. The system supports flood control measures and helps protect urban environments from flood damage. In Japan, our Eco-tank system is often installed beneath a range of public spaces, including school playing fields, parks, baseball grounds, tennis courts and carparks.

The system brings the added benefit of being quick to install due to our use of pre-stressed long-span structures. Structures of this type require fewer internal pillars, which makes their construction much faster than conventional water storage facilities. As a result, Eco-tank is ideal for school as these buildings are often erected within a short timeframe.

The tanks are installed below the flood control basin, which it itself situated next to a watercourse. If water overflows from the river, it is first captured within the storage tanks. However, if water levels rise further, subsequent flooding is held within the flood control basin. The Eco-tank system integrates the flood control basin with the water tanks to provide better control over how increased water is controlled and to offer the best use of existing land.

Unique
Technology

MORE FLEXIBILITY

Eco-tank offers 5 or 10m spans with two types of beam. These can be erected horizontally or vertically, making possible a range of sizes

GREATER VOLUME

Reduced columns ensures that water inhibition rate on columns and walls is reduced, storage level is greater than conventional tanks and depth is greater than tanks of a comparable surface area

REDUCED COSTS

Fewer columns require less excavation, which speeds up construction and lowers costs

EASE OF MAINTENANCE

The space between columns is wider than conventional storage tanks, making it easier for cleaning vehicles to access the tank

QUICKER TIME

Pillars are pre-cast in concrete and connected by pin-type structures in the roof, which dramatically reduces construction time

SHEER SIMPLICITY

Tensioning work on pre-cast concrete beams and slabs is not required making construction simpler

Service Flow

Our greening solutions are installed as follows:

ENGINEERING
CONSULTING

DESIGN

CONSTRUCTION

MAINTENANCE
& RENOVATION

EVALUATION

Projects

ENVIRONMENTAL - ECO-TANK

Jouei Land Adjustment

ENVIRONMENTAL - ECO-TANK

Jouei Land Adjustment

ENVIRONMENTAL - ECO-TANK

Jouei Land Adjustment

ENVIRONMENTAL - ECO-TANK

Jouei Land Adjustment

ENVIRONMENTAL - ECO-TANK

Akasaka Eco-Tank

LocationYamanashi, Japan
Pondage1,110m²
Year completed2011
Group CompanyKawada Construction Co., Ltd.
LocationYamanashi, Japan
Pondage7,770m²
Year Completed2013
Group CompanyKawada Construction Co., Ltd.
LocationYamanashi, Japan
Pondage4,010m²
Year Completed2010
Group CompanyKawada Construction Co., Ltd.
LocationYamanashi, Japan
Pondage5,300m²
Year Completed2009
Group CompanyKawada Construction Co., Ltd.
LocationGifu, Japan
Pondage3,017m²
Year Completed2007
Group CompanyKawada Construction Co., Ltd.