Saw-like Vertical Construction Joint for Concrete Floor Leveling
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Solution Overview
Problem
Existing concrete floor joints with horizontal profiles face difficulties in leveling and restricted slab movement due to their wide upper profile, which is inadequate for maintaining continuity under heavy loads and frequent maintenance demands.
Innovation Solution
A construction joint featuring two vertical steel strips with a saw-like shape and an anchoring system, paired with T-shaped steel sheet profiles and slots for load transmission devices, allowing for adjustable and flexible movement and leveling between adjacent slabs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If horizontal profiles with sinusoidal cutout are used, then continuity in wheel-slab contact is achieved, but leveling becomes difficult and slab movement is restricted
Solution Approach 1:
The joint is divided into multiple vertical profiles instead of a single horizontal profile, allowing each profile to be independently positioned and leveled while collectively maintaining wheel-slab contact continuity
Solution Approach 2:
The profile orientation is changed from horizontal to vertical, transforming the geometry from a wide horizontal sinusoidal cutout to narrow vertical saw-like profiles, which enables easier leveling while maintaining the continuity function
2Reliability
If horizontal profiles with wide upper profile are used, then wheel-slab contact continuity is maintained, but slab movement in the direction of the joint line is restricted
Solution Approach 1:
The continuous horizontal profile is segmented into multiple vertical profiles spaced apart, creating gaps that allow slab movement while the collective arrangement maintains wheel contact continuity across the joint
Solution Approach 2:
Changing from horizontal to vertical profile orientation reduces the width occupied by the joint structure, thereby increasing the space available for slab movement in the joint line direction while preserving the continuity function
3Adaptability or versatility
If vertical profiles with saw-like shape are used, then slab movement is improved and leveling is easier, but the anchoring system complexity increases
Solution Approach 1:
The anchoring function is merged with the structural profile itself by incorporating anchoring elements directly into the vertical steel strips, eliminating the need for separate anchoring components and reducing overall system complexity
Solution Approach 2:
The joint combines different materials (steel profiles for structure, concrete for anchoring medium) with integrated anchoring features, creating a composite system that achieves both movement capability and secure anchoring without excessive complexity
Data Source
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AI summary
The present invention relates to a construction joint for concrete floors especially suitable in places where heavy or fragile loads are handled. It consists of two vertical saw-like bended steel strips (1), equipped with an anchoring system to the concrete slab (2) supported by steel sheet profiles with the upper part in the shape of a T (5) that can have fixed height or be associated with a sliding profile. In the steel sheet profile there are slots for the passage / placement of load transmission devices (4). For repairs of existing floors it is possible to use only the top part of the joint.