Sewage Treatment Works, Dorset


Project Description

SCOPE OF WORKS: 310 No. Driven Precast Piles

EQUIPMENT: Banut 300 Rig

CONTRACTOR: Wessex Water

CONSTRUCTION PERIOD: August 3rd 2018 – September 14th 2018

Aarsleff Ground Engineering were awarded the piling contract by Wessex Water, for the extension of Gillingham’s Sewage Treatment Works (STW) in Dorset.

Gillingham STW is located approximately 580m south west of the centre of Gillingham and 1.45km west of Ham common and serves a population of 15,100. An extension to Gillingham’s STW is required to provide additional plant and equipment to treat an increased volume of wastewater, and installation of phosphorous removal plant.

The site, which is triangular in shape, comprised a mixture of grassed areas, gravel, concrete hardstanding and STW infrastructure. The south eastern boundary of the site is defined by a row of trees beyond which lies a railway track. The site is located
on superficial deposits comprising both Alluvium and Head deposits, characterised by clay, silt with sand and gravel appearing in the Head Deposits. The underlying bedrock is shown to comprise Kimmeridge Clay Formation of Jurassic age, defined as calcareous
mudstone with occasional thin siltstone beds.

Aarsleff commenced on site in early September 2018, installing 303No. precast concrete piles with its Banut 300 rig, ideally suited for restricted access sites. The piles were 250mm square section and between 5-13m in length, designed to cater for up
to 455kN compressive working loads. All piles were manufactured in Aarsleff’s sister manufacturing facility Centrum Pile and were therefore tested and confirmed as structurally competent before delivery to site.

Aarsleff’s Simon Cottington commented, “This project went smoothly from beginning to end and we worked well with Wessex Water to ensure successful delivery on programme and within budget. Site preparation from Wessex Water meant that there were no delays
and we could carry out a thorough probing exercise across all areas far enough in advance. We look forward to working together again next time round. ” Aarsleff completed the pilings work on the 24th September 2018.

Case Study

A leading UK ground engineering specialist, focusing on multi-discipline excellence and value engineering. We design and deliver some of the UK’s largest ground engineering projects.

Our vision is to bring confidence to those constructing the landscape of tomorrow .

1947. Central Jutland, Denmark. Per Aarsleff borrowed 10,000 Danish Kroner from his father’s life insurance, bought an excavator, and founded Northern Europe’s leading contracting company.

Our biggest asset, our team is composed of the leading experts in ground engineering. Working with collaboration and cohesion at the core of our business, we can guarantee a quick and founded answer to all your questions.

We recruit and reward our people based on our ‘Step into the Blue’ company culture, where we embrace the core values of Life and Health, Trust, and Responsibility.

We do everything to ensure our team and yours work safely on our sites. With our core value of Life & Health, we see safety as a cultural pillar.

Our ISO accreditations are an assurance to you that we take governance seriously. Read our policies to discover more.

The projects that keep society running. Bridges, buildings, transit and rail facilities, embankment support, marine and offshore facilities, mines, airports, and water projects.

Keeping things turning. Sewage Treatment Works, Waste Water Treatment Works, Wind Farms and Wind Turbines, Biomass Plants, and Power stations.

Meeting society’s needs. Nursing and care homes, MOD buildings, Schools and Universities, and small or large-sized residential developments.

Staying on the move. Remediation, bridges, and foundation work are integral to keeping the industry running smoothly.

The landscape of the marketplace. Mega-retail sheds, distribution warehouses, University accommodation, and major supermarket and household name units.

Keeping things afloat. Ports and harbours, coastal defences, river embankments and inland waterways.