When building in cramped urban environments, micropiles are used to create vertical geotechnical screens (separating diaphragms) to separate the foundations between existing and newly constructed buildings in order to minimize the negative impact of new construction on existing development.
In combination with ground anchors, micropiles are widely used in the construction of retaining walls or pit fences. Micropiles can also be useful in the implementation of anti-landslide measures, where they are used to create retaining walls or as dowels (inclined piles) to increase the degree of stability of slopes.
The decision to use micropiles is made based on the geotechnical conditions, the current efforts, and the conditions of work. In practice, micropiles are made with a diameter of 150 mm to 325 mm and their length is up to 25 m. In accordance with the functional purpose of a micropile, its reinforcement can be performed with a single reinforcing bar, reinforcing cage or rigid reinforcement with a rolling profile. The filling of the micropile shaft is carried out by injection of cement mortar, while the strength of the cement stone is easily achieved at 250 ... 300 kg / cm. To achieve a high bearing capacity of micropiles on the ground or when they are installed in difficult engineering and geological conditions, micropiles can be made using a supporting injection pipe with collars, which allows additional injection of cement mortar.
In combination with ground anchors, micropiles are widely used in the construction of retaining walls or pit fences. Micropiles can also be useful in the implementation of anti-landslide measures, where they are used to create retaining walls or as dowels (inclined piles) to increase the degree of stability of slopes.
The decision to use micropiles is made based on the geotechnical conditions, the current efforts, and the conditions of work. In practice, micropiles are made with a diameter of 150 mm to 325 mm and their length is up to 25 m. In accordance with the functional purpose of a micropile, its reinforcement can be performed with a single reinforcing bar, reinforcing cage or rigid reinforcement with a rolling profile. The filling of the micropile shaft is carried out by injection of cement mortar, while the strength of the cement stone is easily achieved at 250 ... 300 kg / cm. To achieve a high bearing capacity of micropiles on the ground or when they are installed in difficult engineering and geological conditions, micropiles can be made using a supporting injection pipe with collars, which allows additional injection of cement mortar.