Adjustable Cornice Formwork Support for Bridge Cantilever Geometry

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Solution Overview

Problem

Existing cornice formwork systems struggle to achieve optimal static properties for diverse cantilever geometries in bridge construction, as they are often designed for specific cantilever shapes, limiting adaptability.

Innovation Solution

A suspension head with adjustable length, allowing connection in multiple mounting positions and telescopic elements, enabling the suspension device to accommodate various cantilever designs by varying the distance between anchoring and compression points.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed-length suspension head is used, then the device structure is simple, but it cannot adapt to different cantilever geometries

Engineering Contradiction:
Improveadaptability to different cantilever geometriesVSAvoidsuspension head structure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The suspension head incorporates a telescopic mechanism with movable sections that can be extended or retracted to different lengths. This dynamic adjustment capability allows the same suspension head to adapt to various cantilever geometries and span requirements, resolving the contradiction between adaptability and structural simplicity.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The suspension head's key parameter - its length - is made variable through the telescopic mechanism. By changing the length parameter to match different cantilever dimensions, the system achieves versatility across multiple bridge designs without requiring completely different suspension head models for each geometry.

Inventive Principle:
Principle #35Parameter changes

2Stability of the object's composition

If the distance between tension and compression points is maximized, then structural stability is improved, but the device cannot accommodate narrow cantilevers

Engineering Contradiction:
Improvestructural stability of suspension headVSAvoidcompatibility with narrow cantilevers
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The telescopic mechanism enables the distance between tension and compression points to be dynamically adjusted. For wide cantilevers, the suspension head extends to maximize stability; for narrow cantilevers, it retracts to the appropriate length, ensuring both structural stability and adaptability across different bridge geometries.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP4617432B1Cornice formwork support unit
Publication Date: 2026.01.28 DOKA GMBH
  • EP4617432B1 patent drawingFigure 1
  • EP4617432B1 patent drawingFigure 2
  • EP4617432B1 patent drawingFigure 3

AI summary

Cornice formwork support unit (5) for fastening to a cantilever arm (2), preferably a bridge (3), comprising: a suspension device (6) with a suspension head (7) for fastening to the cantilever arm (2), wherein the suspension head (7) has an anchoring part (26) for anchoring in the cantilever arm (2) and a pressure part (25) for support on the cantilever arm (2), a cornice support (10) which is mounted on the suspension device (6), a cornice clamp (16) for supporting a cornice formwork device, wherein the cornice clamp (16) is mounted on the cornice support (10), wherein the anchoring part (25) and the pressure part (26) can be connected to one another in at least two mounting positions for adjusting the length of the suspension head (7).