The construction and maintenance of access roads is an integral and costly part of forestry operations. The presence of soft soil conditions pose particular challenges which can lead to delays and the generation of unforeseen expenses; period immediately following prolonged wet weather conditions are especially troublesome in the regard. Pacific Corrugated biaxial (BX) geogrids provide the most cost effective and reliable means by which to construct access roads.
Where larger areas require construction of a solid surface on which to haul logs and undertake similar activities, BX geogrids can be used to drastically reduce the amount of aggregate fill required. In some cases in is also possible to use inferior quality materials (e.g. sand, aggregates with high fines content, etc.) rather than well graded, high quality and expensive stone.
OUR COMPANY’S TEAM OF SITE SOLUTION EXPERTS IS ABLE TO PROVIDE A FULL SUPPORT SERVICE ON FORESTRY PROJECTS. THESE INCLUDE:
Pacific Corrugated Pipe BX geogrids are “rolled-goods” products comprising of a set of stiff, intersecting plastic ribs which form a grid-like structure.
As with geotextiles, geogrids are generally placed directly on the existing soil prior to covering with an aggregate base of similar material. The coarser aggregate particles partially penetrate through the apertures of the geogrids thereby generating a high strength, mechanical connection between the two materials.
By introducing a geogrid, the aggregate base stiffness is increased significantly and maintained during the full service life of the road.
This greatly aids construction of roads built on soft soils and, for a given set of soil conditions, can normally result in a reduction in the amount of aggregate base required.
Pacific Corrugated biaxial (BX) geogrids provide the most cost effective and reliable means by which to construct access roads.
The construction and maintenance of access roads is an integral and costly part of forestry operations. The presence of soft soil conditions pose particular challenges which can lead to delays and the generation of unforeseen expenses; period immediately following prolonged wet weather conditions are especially troublesome in this regard.
HANCOCK MOUNTAIN ROAD, DOUBLAS COUNTY, OR
OWNER: Douglas County Forest Products
PRODUCT: Pacific Corrugated BX2020 Geogrid
DATE: March 2013
The existing access roads at the site were suffering from excessive rutting and required complete reconstruction. The initial proposal involved the use of 14 inches of coarse (6 inch-minus) aggregate overlain with a 3 inch thick capping layer. Instead, after placing a layer of Pacific Corrugated BX2020 on top of the existing subgrade, only 12 inches of aggregate was used to produce a stable road. This was the best performing road on the project despite up to 36 inches of aggregate being used in other parts of the site.
FITZPATRICK CREEK SLIDE, ELKTON, OR
OWNER: Roseburg Forest
PRODUCT: Pacific Corrugated BX3030L Geogrid
DATE: January 2016
On this site a slope failure had resulted in the loss of half the existing logging road. As this was the only road leading into and out of the area, an expedient fix was required. A steady flow of water resulted in the formation of an extremely weak subgrade and based on previous experience, the contractor estimated that 24 inches of rip-rap would be required to stabilize it. Instead, a layer of Pacific Corrugated BX3030L geogrid was placed and then topped with only 10 inches of (3 inch-minus) aggregate. A further 3 inch thick capping layer was placed to produce the stable road structure.