The term “micropile” covers piles with a diameter of up to 300 mm. Quite often single rods or rod groups and also small reinforcement cages are used as bearing elements. The bearing element is placed in a drill hole, which is filled with cement suspension. The so-called “self-drilling anchor” is a special method. For this type of pile, the bearing element which is provided with an opening for flushing is also used as a flushing rod. For all these kinds of piles the cement stone coating serves both as load transmission from the bearing element into the building ground and as protection against corrosion. If there are special requirements with regard to protection against corrosion, the bearing elements can also be zinc coated or already supplied with a factory-made cement stone coating in a ribbed pipe. The bearing elements can easily be coupled and thus also used in restricted heights. By means of focussed groutings high pressure and / or tensile loads can be absorbed. Thus, micropiles are suitable both for base anchoring as buoyancy control and to anchor supporting and retaining walls. The piles are driven by means of anchoring drills and, in restricted spaces and heights, by small drills. These piles are also used for foundations of all kinds and are especially suitable for post foundations.
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Anchors secure construction pit in Karlsruhe against groundwater
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