Scope of Project:
The ESSROC project is an example of the use of non-traditional applications and techniques designed and implemented for the effective installation of micropiles by combining low mobility grouting to achieve the desired design loads.
Specifically, this project included the installation of over 1,600 total micropiles (totaling over 93,000 linear feet) through highly karstic limestone for the expansion of the existing cement plant. The micropiles were designed for 350-tons axial compression, 125-tons axial tension, and 15 tons lateral load capacity. Throughout the course of the project, process adaptations to the normal installation of micropiles were necessary – as significant voids were encountered that required a grouting program to fill the voids and stabilize the free length of the micropiles. Numerous load tests were also performed to verify the capacity of the micropiles in rock and grouted zones of the project. Similarly, multiple drill rigs were used during the course of the work in order to facilitate the installation of the necessary micropiles and low mobility grouting.
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