Tree Root Protection  

Woodland Access, Abweb TRP, Center Parcs, Woburn , UK

Project Information

Client:Center Parcs
Contractor:Birse Construction / Geogreen
Consultant:Hannah Reed
Product:Abweb TRP geocell
Quantity:4,700m2
Benefits:- No dig, no compaction solution
- Allows close vehicular movements to trees less tree removal
- Porous open surface feeding roots with water, oxygen and nutrients
- Savings on subbase depth
- Fast and easy construction


Project Description

The Center Parcs Woburn is the fifth village development of the holiday chain in the UK and represents a major investment by the firm. Following completion of all the requirements of the planning consent construction began early in 2012 for a target opening date of spring 2014. The requirements of the planning consent included building a new roundabout, the diversion of public rights of way and the creation of new bridleways and cycle paths around the development complex. Many of these bridleways and cycle paths were through mixed forest comprising mature and semi-mature deciduous trees intermixed with some blocks of coniferous plantations in which the holiday village was to be constructed.

The Challenge

Whilst the planning authorities requested that these infrastructure works were undertaken they also insisted that they used a method sympathetic to the environment and ideally using no-dig construction methods that would not damage the roots of the trees through which the access roads and bridleways were to be constructed.

The Solution

Whilst there are a number of solutions available Hannah Reed, chose the geocell structure solution, ABG Abweb TRP, within the road construction. This method is supported as a solution in Aboriculture Practice Note 12 (APN12) and is widely accepted by Tree Protection Officers in this application. Abweb TRP geocell has a three dimensional cellular structure which, when filled, mitigates the vertical loads pressure on the sub-soils containing the tree roots, thus preventing damage through compaction and root starvation.

Surface vegetation is removed and the ground is carefully levelled so as not to damage the underlying tree roots making sure they are just covered. A layer of ABG Terrex nonwoven geotextile separator is placed to prevent upward migration of fine particles allowing the granular fill material to remain porous. The Abweb TRP geocell is then expanded to the specified road width and pinned using steel pins forming diamonds shaped pockets which are then filled with the granular material. The cells act as a permanent formwork to the road surface in this no dig solution. Water, air and nutrients can flow into the underlying soil allowing the tree roots to flourish whilst being protected from vehicular loading.

The geocells cellular structure reinforces the granular fill reducing the need for subbase saving up to 50% of fill material over a non-reinforced solution.

Abweb acts as a platform for vehicles protecting the roots from wheel damage

Simple and fast “no-dig” installation. Expand Abweb TRP to form cells, pin into place and fill and with porous granular material allowing air and water to reach tree roots. Abweb TRP geocell acts as a platform for vehicles protecting the roots from wheel damage.

Abweb Geocell has a three dimensional cell structure
Rutting caused by traffic before the Abweb geocell is placedRutting caused by traffic before the Abweb is placed
Abweb geocells can be trafficked immediately protecting the tree rootsCan be trafficked immediately protecting the tree roots

The ABG Service

ABG’s technical department were able to give advice on the correct size of Abweb TRP Geocell required for the given loading and soil conditions. Assistance with installation was given.

Contact ABG today to discuss your project specific requirements and discover how ABG past experience and innovative products can help on your project.

Abweb TRP - Tree Root Protection

No-dig geocellular alternative to traditional methods of constructing paths, roads and parking areas in and around trees. It is designed to protect the root structure of the tree from damage caused from the compaction of the local soils as a result of vehicular traffic. 

more...

ABG Abweb geocell for tree root protection access roads
 

Products

Abweb TRP - Tree Root Protection

No-dig geocellular alternative to traditional methods of constructing paths, roads and parking areas in and around trees. It is designed to protect the root structure of the tree from damage caused from the compaction of the local soils as a result of vehicular traffic. 

more...

ABG Abweb geocell for tree root protection access roads
 

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