Piled embankments along A12
To reduce traffic congestion at the heart of Reeuwijk Brug (The Netherlands), a new four-kilometre-long bypass is being built around Reeuwijk. Because of the poor load-bearing capability of the subsoil and with an eye on the stability of the A12, a settlement-free solution, using piled embankments with high-strength geotextiles from TenCate, has been chosen.
What is remarkable is that the bypass will be laid entirely on a piled embankment system. When building a road on a weak subgrade, a piled embankment may be the solution if traditional solutions require too much building time or subgrade settlement involves too much maintenance or can damage objects in the vicinity. The advantage of a piled embankment is that no, or virtually no, settlement occurs.
A piled embankment consists of a foundation of piles topped with a reinforced base course – the mattress. This mattress is built of materials from the TenCate Geolon® PET range supplied by TenCate Geosynthetics. These will be installed in June this year, and TenCate Miragrid® GX and TenCate Polyfelt® TS will also be used in the installation. Close by, where work is in progress on the parallel A12 structure, a start has been made on installing piled embankments. Reinforcement TenCate has been selected for this solution because of the excellent durable characteristics of the reinforcement, the technical support from TenCate Geosynthetics and the optimization of the installation and site plans. On the basis of these site plans, the contractor installs the reinforcement exactly according to plan and calculation. The panels are inserted on the basis of GPS coordinates.
The project contractor, Heijmans, is positive regarding the materials, delivery, quality and two-way communication with TenCate Geosynthetics. Currently, TenCate Geosynthetics is involved in several major projects. This is the result of an infrastructural application within the market group which enjoys priority within the marketing strategy.
The bypass will soon rest on a foundation of approximately 10,000 concrete piles. The project will be completed in 2016.