Pillar Formwork

Abstract

A column formwork for use in concrete construction is described, including a planar member 1 constituting the formwork, and at least one connecting section provided for form-fit connecting two opposing edges 3, 3 ′ of the planar member ( 1 ) and thus for constituting a tube segment, wherein at least the connecting-section surface facing the planar member 1 exhibits a substantially constant curvature that substantially corresponds to the curvature of the tube segment.

1 . A column formwork for use in concrete construction, comprising:
 a single formation ( 1 ), said single formation comprising a glass fiber reinforced elastic synthetic material having a thickness of 1.4 to 2.5 mm, and   at least one connecting section provided for positively connecting two opposing edges ( 3 ,  3 ′) of the single formation ( 1 ) and thus for forming a tube segment from the single formation;   wherein at least a connecting-section surface ( 4 ,  4 ′) facing the formation ( 1 ) exhibits a substantially constant curvature and the curvature substantially corresponds to a curvature of the tube segment.   
   
   
       2 . The column formwork according to  claim 1 , characterized in that, additionally, the connecting-section ( 2 , 2 ′) surface ( 5 ,  5 ′) facing away from the formation ( 1 ) exhibits a constant curvature, this curvature differing from the curvature of the tube segment. 
   
   
       3 . The column formwork according to  claim 1 , characterized in that the connecting section ( 2 ,  2 ′) is constructed of synthetic material. 
   
   
       4 . The column formwork according to  claim 1 , characterized in that the connecting section ( 2 ,  2 ′) is constructed of a polyester or of a fiber reinforced synthetic material. 
   
   
       5 . The column formwork according to  claim 1 , characterized in that the formation ( 1 ) and the connecting section ( 2 , 2 ′) consist of the same material. 
   
   
       6 . The column formwork according to  claim 1 , characterized in that the connecting section ( 2 ,  2 ′) extends in the direction of the tube-segment axis over the entire length of the tube segment. 
   
   
       7 . A column formwork for use in concrete construction, comprising:
 a single formation ( 1 ), said single formation comprising a glass fiber reinforced elastic synthetic material having a thickness of 1.4 to 2.5 mm, and two connecting sections ( 2 ,  2 ′) provided for positively connecting two opposing edges ( 3 ,  3 ′) of the single formation ( 1 ) and thus for forming a tube segment from the single formation;   wherein a connecting-section surface ( 4 , 4 ′) facing the formation ( 1 ) exhibits a substantially constant curvature and the curvature substantially corresponds to a curvature of the tube segment.   
   
   
       8 . The column formwork according to  claim 7 , characterized in that, additionally, the connecting-sections ( 2 ,  2 ′) include a surface ( 5 , 5 ′) facing away from the formation ( 1 ) which exhibits a constant curvature, this curvature differing from the curvature of the formation ( 1 ). 
   
   
       9 . The column formwork according to  claim 7 , characterized in that the connecting sections ( 2 ,  2 ′) exhibit, in the direction of a formation ( 1 ) tangent perpendicular to a formation ( 1 ) axis, an extension (t) of 1 to 50% of the circumference of the tube segment. 
   
   
       10 . The column formwork according to  claim 7 , characterized in that the connecting sections ( 2 ,  2 ′) exhibit, in the direction of a formation ( 1 ) tangent perpendicular to a formation ( 1 ) axis, an extension (t) of 5 to 15% of the circumference of the tube segment. 
   
   
       11 . The column formwork according to  claim 7 , characterized in that the connecting sections ( 2 ,  2 ′) exhibit, in the direction of a tube-segment tangent perpendicular to a tube-segment axis, an extension (t) of 10 to 100 mm. 
   
   
       12 . The column formwork according to  claim 7 , characterized in that the connecting sections ( 2 ,  2 ′) exhibit, in the direction of a formation ( 1 ) tangent perpendicular to a longitudinal axis of the formation ( 1 ), an extension (t) of 30 to 50 mm. 
   
   
       13 . The column formwork according to  claim 7 , characterized in that the connecting sections ( 2 , 2 ′) are constructed of synthetic material. 
   
   
       14 . The column formwork according to  claim 7 , characterized in that the connecting sections ( 2 ,  2 ′) are constructed of polyester or of a fiber reinforced synthetic material. 
   
   
       15 . The column formwork according to  claim 7 , characterized in that the formation ( 1 ) and the connecting sections ( 2 , 2 ′) consist of the same material. 
   
   
       16 . The column formwork according to  claim 7 , characterized in that the connecting sections ( 2 ,  2 ′) extend in the direction of the tube-segment axis over the entire length of the tube segment.