THE USE OF PYRAMIDAL PILES IN BUILDING
Pyramidal piles are a progressive design of piles used in building. These piles have the shape of an enlarged pyramid; they are rammed into the ground, acute end first. Unlike prismatic piles, piles pack the soil along the sides while sinking into it, thus enhancing the mechanical quality of the soil, and subsequent conveying the load of the whole side surface upon the packed basis.
Such distinctive features of the work of prismatic and pyramidal piles in the soils ensures the possibility to enhance the bearing capacity of pyramidal piles with respect to prismatic piles by 1.5-2 times.
Pyramidal piles are used in the basis of buildings and constructions for various purposes and designs. They are especially effective when packed soil lies on the upper part of the basis from 3 to 5 m deep, while soil can lie underneath.
In this case pyramidal piles must work as single piles. Midal piles are arranged in groups and joined by a low foundation raft the depth of the loose soil should be taken into consideration as well as the number of piles in the group. If the basis is made up of packed soil along the whole depth, the number of piles in the group is not limited.
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