Micropiles are a deep foundation element constructed using high-strength, small-diameter steel casing and/or threaded bar.
Micropiles are small piles generally ranging in size from 3 1/2″ to 9 7/8″ diameter. The piles are generally used for unpinning and retrofitting structures.
Typically, a hole is drilled into the soil or rock to create an opening for the casing of the micropile. The casing is advanced to the design depth using a drilling technique. Reinforcing steel, typically an all-thread bar, is inserted into the casing. The micropiles are then grouted by back filling the hole from the bottom, using cement mortar (grout).
Micropiles can be used in many different instances:
– Replace deteriorating foundation systems
– Provide extra support for structures during renovation
– Provide pile foundations where access, geology or environment prevent the use of other methods
– Support structures affected by adjacent excavation, tunneling or de-watering activities
– Provide a fast, effective alternative to more traditional underpinning methods
Customers can have them installed through most ground conditions, obstructions and nearly all foundations at any incline. We can also be pre-install them to working load before connecting to particularly sensitive structures. At last, but not least, they have a simple and economical connection to existing and new structures.
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