Steel screw piles in St. Petersburg

Screw piles are steel tubes with welded blades of a certain configuration. To make foundation the steel screw pile, covered with corrosion-resistant composition, length of 2 m, is screwed into the soil to a depth of not less than 1.6 m accordance with the plan of the foundation pile field. When there is a peat screw pile is tighten up until a layer of soil subsidence will not be passed.

The first screw piles were installed more than 200 years ago in the UK. British engineer Alexander Mitchell suggested the use of screw piles as constructs that can be screwed into the ground. This technology has proven its practicality in the construction of lighting design in London in the tide area. After 12 years in the Bay of Delaware (USA) was installed beacon on the basis of a new metal piles design: the foundation was designed as a steel pipe, welded with screw caps. The pipe itself was a part of the ground, as the screw is screwed into the wood.

In Russia, the first screw piles appeared 30 years later and also had success. It was found that screw piles are very useful in the permafrost and the extreme north of weak soils in coastal areas. In our country, screw piles, at first were used in the construction of military fortifications, and then in civil engineering.