What Are Micropiles?
Micropiles are a structural procedure used to create a deep but narrow foundation composed of primarily high-tensile strength steel rod and specialized grout. Depending on the situation, a steel sleeve may also be incorporated around the grout and the steel rod. The depth of the micropile can vary from 30 to well over 100 feet. The width of a micropile is typically anywhere from 2 to 10 inches. This technique is especially appropriate for upgrades in renovations due to their low cost, ease of installation, and relatively low noise. Due to the drilling machinery, they can also be ideal in rough terrain where hard soil and boulders exist.
Our Capabilities
Micropiles are used frequently in the work we do in Colorado. We have the experience designing micropile systems, installing, and testing.
Contact us to learn more about our experience with micropiles.
Shotcrete
Shotcrete is a new leader in functional and creative construction for endless possibilities.
Rock and Soil Stabilization
Rock and Soil Stabilization through a design-build approach can deliver the essential shoring requirements for your project.
Infrastructure Repair
Offering economical solutions to pipelines, bridges and roads that are low impact to the public.
Renewable Energy
Focusing on foundation elements for Solar, Wind, and Water that has evolved into site specific design-build applications.
Architectural Shotcrete
After the engineering and construction of walls, many owners go a step further in the appearance of the wall. Sculpted Shotcrete is one of many choices.
How They Are Installed
There are basically two methods of micropile installation:
With a drill bit and a removal casing
With this technique, the drill bit and casing are both inserted into the ground at the same time removing the dirt and rock. Once the required depth is reached, the drill bit is removed and the casing is left in to keep the hole from collapsing. The hole is then filled from the bottom and the steel casing is either removed completely, partially, or not at all. The amount of casing left behind depends on the strength requirements and soil conditions. Finally, the pile cap is installed.
Using a hollow rod with built-in drill bit
With the hollow rod method, There is no need to use a removable casing. The hollow rod has a sacrificial drill bit on the end that is used to drill to depth. While drilling, grout is pumped through the hollow rod, filling the hole and eliminating the need for the sleeve. Like the traditional method, a pile cap is installed as a final step.
Testing
Once the grout is dry and cured, a load test may be administered to ensure the specification is met. (Seen to the right.)
Need a Quote?
Thorcon Shotcrete and Shoring is a reputable, Colorado-based Geotechnical Contractor. Our technical team specializes in slope stabilization and design-build projects that include Micro-Piles, Shotcrete/Gunite, Rock Bolts and Ground Anchors.
We provide Colorado and the surrounding states with our high standard of service. Please don't hesitate to contact us if you have any questions about your shotcrete needs.