The site comprises the redevelopment of a former barracks with 450 units across a 12.5Ha site. A total of 115 trial holes between 1 – 25m have been excavated across the site through a series of pre and post demolition investigations. The site has a complex history with many development layers and deep made ground across the site. The client has committed to reduce emissions from their supply chain and customers homes.

The site is underlain by interbedded sands and high plasticity clay across the majority of the site. Our foundation recommendations were for

• For strip footings, a bearing capacity of 80kPa founding on the firm clays or medium dense sands below 1m.
• Piled foundations were recommended where there were areas of deep made ground.

Based on the ground model assumptions were made for the strip and piled foundations along with the soil reuse on site.

This enabled LEAP to calculate the carbon footprint of the proposed foundation depth and identify the carbon ‘critical point’, where piled foundations become more carbon economical than strip foundations, in this case 1.8m bgl.

Project Overview

Client Name
National developer

Location
Aldershot, Hampshire

Services Provided

• Phase I and II preliminary site investigation
• Phase III+ detailed site investigation
• CReDiT foundation calculator

Added Value

• Detailed knowledge of ground conditions enabling efficient design
• Minimised soils movements and disposal costs off site.