Lightweight construction element of a semicircular in natural stone, a method for the manufacture of such a lightweight construction element and the use of the lightweight construction element

摘要

The present invention relates to a lightweight construction element, which is designed as a half-shell having a rounded outer side, in which the outer layer of natural stone strip is formed and the inwardly adjoining support layer made of lightweight concrete is. In the production of this lightweight structural component are placed into a bottom mould nature stone strip is inserted and at a distance from this an inner tunnel-lining sheathing layer positioned and fixed. Subsequently, the hollow space produced with lightweight concrete is cast. The rounding of the half shell takes place in a lathe, wherein for the rounding operation two half shells can be laid to a circular shape.