Unique storm water solution
Our English pipe producer Polypipe Civils in Loughborough, UK has provided a stormwater attenuation solution for a luxury residential development in the heart of the idyllic Bedfordshire countryside in eastern England.
Renowned developers, Taylor Wimpey, called upon Polypipe to provide an engineered drainage solution, designed to work with a sloping gradient found on site. Set in the countryside town of Houghton Regis, the Regent’s Place large-scale residential development comprises of a mix of 180 two, three and four bedroom houses nestled in a tranquil area that offers stunning views of the landscape. The landscape surrounding the Regent’s Place development features a large public open space with limited footprint for drainage design and sloping gradients. Taking on the challenge, Polypipe worked closely with Taylor Wimpey and Consultant Engineers JPP Consulting, to design a KRAH storm water solution, incorporating staggered legs to take requirements and adopted elements laid out under Section 104 agreement for approving site conditions into account that also met site water company, Anglian Water.
The attenuation tank supplied for the Regent’s Place project boasts a 3m diameter offset
RIDGISTORMCheck Vortex Flow Control Chamber which controls discharge water from the tank at an agreed rate of 10l/s, so the local watercourse is not overwhelmed. To control additional flow when required, the chamber also features a penstock flow control.
Project ValPolypipe supplied over 500m of Ridgistorm-XL to form 14 pipe runs in 2100mm diameters. Polypipe’s technical team engineered and designed the pipe to ring stiffness SN2 to meet the ground conditions, burial depths, native soil pressures and loading on-site. The system was tested to pass required deformation and buckling checks in accordance with BS EN 1295-1.
To accompany the pipe runs, the Ridgistorm-XL system incorporated 34 pre-fabricated modularised fittings which included 90° bends and ‘F’, ‘T’ and double ‘T’ fittings to fit the limited on-site dimensions perfectly.
The socket and spigot nature of these engineered fittings kept jointing to a minimum allowing for easy pipe alignment and speedy installation using electro-fusion jointing. This in turn significantly reduced on-site installation time and cost.
To achieve this closed loop system all pipe and fittings needed to be manufactured to a tolerate of +/-10mm on any length dimension. Due to limited storage space on site, manufacturing and delivery slots were planned with minimum safety gaps. This only allowed 3 days from completion of manufacturing to the installation of product.
Polypipe has worked on many residential projects in the past and understand the implications surrounding routine maintenance work. In order to make maintenance work less strenuous and overall safer for installers, Polypipe also supplied x10 RIDGISTORMAccess. Manholes in diameters 1200mm and 1800mm. The manhole access assists workmen by providing easy access to a pipeline.
Author: Polypipe Civils Head Office, Loughborough, UK