Double-Span Movable Formwork Jointing for Leak-Free Cross Beam Fixing
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Solution Overview
Problem
Existing double-span movable formworks face issues with complex fixation of cross beams and leakage at the closing position of the outer shuttering, compromising safety during construction.
Innovation Solution
A double-span movable formwork system with a close jointing apparatus and frustoconical caps that allow simultaneous fixation of cross beams and prevent vertical gaps, enhanced by baffle rings for wind resistance, ensuring stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cross beams are fixed by bolts during closing, then the fixation is secure, but the fixing process becomes complicated
Solution Approach 1:
The patent extracts the cross beam fixation function from the traditional bolt-based system and integrates it into the outer shuttering closing mechanism. The closing mechanism now simultaneously performs both the shuttering closing and cross beam fixation functions, eliminating the need for separate bolt fixation operations and reducing overall system complexity.
Solution Approach 2:
The patent merges the cross beam fixation operation with the outer shuttering closing operation into a single integrated process. By combining these two functions into one mechanism, the patent reduces the number of separate fixation steps and simplifies the overall construction process while maintaining secure fixation.
2Device complexity
If the closing position of the outer shuttering is at the top of the cross beam, then the structure is simple, but leakage occurs continuously due to the up-down communicated gap
Solution Approach 1:
The patent applies preliminary action by pre-positioning the closing mechanism to automatically block the gap between outer shuttering parts before concrete pouring begins. The closing mechanism is designed to eliminate the up-down communicated gap in advance, preventing leakage issues before they can occur during the pouring process.
Solution Approach 2:
The patent introduces an intermediary closing mechanism that acts between the outer shuttering parts and the cross beam structure. This intermediary mechanism effectively seals the gap while maintaining the overall structural simplicity, preventing direct communication between upper and lower sections that would cause leakage.
3Reliability
If the outer shuttering is closed tightly to prevent leakage, then pouring safety improves, but the fixation of cross beams becomes more complex
Solution Approach 1:
The patent merges the leakage prevention function and cross beam fixation function into a single integrated closing mechanism. This unified approach achieves tight sealing to prevent pouring leakage while simultaneously securing the cross beams, avoiding the need for separate complex fixation operations.
Solution Approach 2:
The closing mechanism is designed with multi-functionality, serving both to tightly seal the outer shuttering against leakage and to fixate the cross beams. This universal mechanism performs multiple functions simultaneously, improving pouring safety without adding separate fixation systems that would increase complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system simplifies cross beam fixation, prevents continuous leakage, and enhances stability under varying wind conditions, improving overall construction safety and efficiency.
Implementation Method 1
a return spring is fixedly connected to a small end of the frustoconical cap, and an end portion of the return spring is fixedly connected to an outer surface of the horizontal rod
Implementation Method 2
wind perpendicular to the horizontal rod will push all the frustoconical caps towards the respective cross beam
Implementation Method 3
wind perpendicular to the horizontal rod will push all the frustoconical caps towards the respective cross beam, so the frustoconical caps may drive the inserting bar into the cross beam
Implementation Method 4
the blade slots on its surface can play a role of wind guidance, which reduces a pushing effect of the wind on the baffle ring
Data Source
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AI summary
The present invention discloses a double-span movable formwork of lower bearing type and a construction method. The formwork includes a main girder, a main bridging beam, a bracket, a propelling flat wagon, a cross beam, an outer shuttering, a front hanging beam and a rear hanging beam. Two main girders are provided, the main girders are connected through a plurality of pairs of cross beams, and the cross beams are in group in pairs with bottom ends thereof connected by bolts. The main bridging beam is fixedly connected to either end of the main girder, three pairs of brackets are provided at bottoms of the main girder and of the main bridging beam at either end of the main girder respectively, for supporting the main girder and the main bridging beam, each pair of brackets are connected through a connecting plate, and the propelling flat wagon is slidably connected to the top of the respective bracket. According to the present invention, through the arrangement of a close jointing apparatus, after the two parts of the outer shuttering are closed by the hydraulic device on the propelling flat wagon, the two cross beams of the same pair can be simultaneously fixed, and the top of the close jointing apparatus is embedded into the joint of the outer shuttering, so that a gap at the joint cannot be communicated up and down, preventing continuous leakage and improving safety.