Biaxial Geogrids

The Gadarwara railway station is approx. 20 km from NTPC site. NTPC constructed the Gadarwara railway siding line for transporting coal to their plant. For this railway siding work, the blanket (subballast) material was not available in the Gadrwara area and transportation of blanket material from outside area was not an economical option. This devoid of blanket material was major concern of project. Also, mining has been banned in our country due to environmental issues, so it had become difficult to get quantity for blanket for formation construction. Apart from unavailability of blanketing material, another concern of this project was the inadequacy of good subgrade material. The subgrade material was of SQ1 type which had fines content of more than 50%. Considering these aspects of project, biaxial extruded polypropylene geogrid MacGrid EG and non-woven geotextile solution MacTex N was proposed for strengthening the formation.

Discover more

Because of quite a large volume of traffic, which adversely affects the traffic flows on Queenstone road, the town of Niagara-On-The-Lake required road to be rehabilitated and widened from Concession 7 Road to Townline Road. The project comprised rehabilitation/reconstruction and widening by 1. 5 m on both sides along a 1,050 m long section, including two culvert crossings of existing watercourse in order to facilitate the proposed road widening and to keep the proposed works within the roadway allowance at the culvert crossing area, the geotechnical engineer of the project proposed a soil retaining structures. Also, it was expected that the road reconstruction had a big amount the surplus excavation material that had to be carried out and dispose.

Discover more

Spring thaw was turning vital farm roads into unstable, rutted traps. Each year in East Perth Township, melting snow saturated the unpaved road network, disturbing the granular binder and mobilizing the black organic native soils below. Under the repeated passage of heavy farming trucks, these saturated soils were pumped upward into the road surface, destroying the structural integrity of the binder layer and creating unsafe, unworkable conditions for agricultural traffic. The Township needed a reliable way to keep the weak native soils confined at the base, prevent intermixing during thaw, and reinforce the road to handle heavy axle loads throughout the farming season.

Discover more