Careys Civil Engineering is delivering enabling, infrastructure and landscaping works on behalf of Skanska at this 150ha site, which will ultimately provide 3,000 new homes, a research facility with 100,000m2 of floor space and a wide range of community amenities. It will also incorporate the largest water recycling system in the UK.
To date we have been awarded three packages within phase 1 of the contract. The first included the main drainage works; 11km of primary and secondary runs up to 7m deep. Subsequently, we secured the public realm package comprising construction of 4km of roads, 41km of kerbs and edgings and the laying of 60,000m2 of various paving types. We have also delivered the site-wide utilities contract, which included the installation of an 11km combined utility trench.
The deep drainage installation presented a number of challenges, compounded by the vast scale of the site and poor ground conditions. We developed multiple solutions including open cut shallow trenches, standard temporary works trench boxes of up to 5m and sheet piled solutions for the deeper areas. On some of the poorest ground conditions we employed a WellPoint system to effectively dewater the ground.
To maintain a sustainable approach to the project, we have used a combination of recycled type 1 aggregate and ballast material rather than limestone type 1, in addition to FSC timber. Throughout the works we have established and maintained strong relationships with stakeholders and the local community through a range of initiatives including a monthly collection for Great Ormond Street Hospital. We have also supported a programme to increase road safety; Safety Cycle Awareness.
Throughout the works, there have been a number of other contractors whom we have worked very closely with. It has been essential to our works that we maintain good communication to facilitate access and complete the works safely and on time.