Industrial Pavement – Expansion of logistics operator warehouses, reinforced with multi-directional rigid geogrid.

The project was developed in the areas of expansion of the logistics operator Ransa, located on the coast of the port of Callao-Lima-Peru, which has covered an area of 71,829.0 m2. The foundation land is comprised of semi-loose silly sands with groundwater level of 0.60 – 1.00 mts.
An improvement of the sub-grade has been projected due to drainage problems of 0.40 meters of average thickness on the natural terrain, due to the current water table, which is 1.0 meters from the sub-grade projected; the sub-grade improvement system is composed of 0.30 mts rip-rap system and 0.10 mts sub-scratch crown, composed of geosynthetic system (Geotextile nonwoven + geogrid TX-140) multi-directional plus added; complemented by a sub-drain system that will control the maximum elevation height of the water which will be 0.50 meters below the projected sub-grade.
The projected flexible pavement is composed of a conventional hot asphalt mix layer of 0.06 mts plus granular materials (sub-base and granular base) reinforced with multi-directional geogrid (TX-160) in multi-directional geogrid (TX-160) in thickness of 0.54 mts, which has served as an optimization of a traditional flexible pavement with reduction of the granular base layers in the order of 30%.
The geogrid-reinforced pavement system, has been evaluated with load plate tests of 12 inch diameter, at 2 levels; one at the level of the projected sub-grade and one at the level of the reinforced base, the test carried out has aimed to , determine the combined reaction module (k76), the composite CBR and the composite elastic module, at the sub-grade level and the reinforced reinforced granular base, in order to validate the parameters assumed by the structural design of the pavement.
From the results obtained, it has been determined that the use of multi-directional geogrid at the sub-scratch and granular base level, helps in reducing the variability of structural response to induced stresses on soft soils, thus reducing the risks of service failure in the time of use of industrial pavement, also validates the structural behaviour parameters assumed in the design of the projected pavement.