Lower-guide type main-truss-free hanging basket

Abstract

The invention discloses a lower-guide type main-truss-free hanging basket. The lower-guide type main-truss-free hanging basket is characterized by comprising a triangular support supporting mechanism, a bottom basket mechanism, side mould mechanisms and a connecting mechanism, wherein the triangular support supporting mechanism is arranged on the upper part of a top plate of a completed box beam; the bottom basket mechanism is arranged on the lower part of the bottom plate of the completed box beam; the side mould mechanisms are arranged at left and right sides of the completed box beam; and the connecting mechanism is used for connecting and suspending the bottom basket mechanism and the side mould mechanisms below the triangular support supporting mechanism. The lower-guide type main-truss-free hanging basket disclosed by the invention has the advantages of being free of a main truss and small in size, realizing a light-weight goal (by improving the form of the hanging basket) of an integral design of the hanging basket by virtue of a miniature design of a stress unit, so that the structures, above bridge floor, of the hanging basket are greatly reduced, thereby greatly reducing weight of the hanging basket and saving a great deal of material (steel) investment.

Description

technical field [0001] The invention relates to bridge construction equipment, in particular to a construction hanging basket for cantilever pouring of bridge beams without main trusses. Background technique [0002] Hanging basket is a special equipment for cantilever pouring of bridge girders. In the construction of modern prestressed concrete continuous rigid frame bridges and cable-stayed bridges that require cantilever pouring of beams, hanging baskets are often used for cantilever pouring. [0003] Traditional hanging baskets usually have the following disadvantages: first, the composition of each component is relatively complex, and the structural forces are interrelated; second, the weight of the hanging basket is generally heavy, especially the main truss, because it has to bear the weight of the box girder block Generally, they are relatively heavy. The ratio of the total weight of the hanging basket to the weight of the construction block is generally less than 0....

AI Technical Summary

Problems solved by technology

[0003] Traditional hanging baskets usually have the following disadvantages: first, the composition of each component is relatively complex, and the structural forces are interrelated; second, the weight of the hanging basket is generally heavy, especially the main truss, because it has to bear the weight of the box girder block Generally, they are relatively heavy. The ratio of the total weight of the hanging basket to the weight of the construction block is generally less than 0.35 to 0.5. The universality of the hanging basket is not good. Once the design is finalized, the bearing capacity generally cannot be changed. Choosing a large one will cause serious waste and inconvenience in construction (so-called big horse-drawn carts); thirdly, the number of webs usually determines the number of main girders. It is triangular. This kind of hanging basket is generally large in shape, with a large amount of steel beams, heavy weight and high cost; fourth, when encountering wide bridges, due to the large width of the bridge floor, the bottom basket is usually wider, generally 20 meters Left and right, resulting in a large number of lower longitudinal beams, and because this kind of hanging basket is usually an integral walking mode, the rear lower beam is usually designed as a truss to meet the walking requirements, so the weight of the rear lower beam is usually relatively large, generally about 4 tons, such a There is a certain degree of difficulty in the installation. Second, the weight of the hanging basket is increased; fifth, the overall walking

The bottom basket (the whole body formed by the front and rear lower beams, lower longitudinal beams, and bottom formwork) is hung on the outer guide beam together with the side formwork at the rear hanging point, and the front end of the bottom basket is hung on the front upper beam at the upper end of the main truss. When walking, all hanging baskets The components walk together. There are certain disadvantages in this method: all components must walk synchronously, otherwise the hanging basket will be distorted and deformed. It is very easy to overturn forward and cause accidents, and the walking weight is heavy, generally walking is very slow, the safety is poor, the safety risk is great when walking, and it is very easy to cause a safety accident that the whole body collapses when walking.

At the same time, it is usually difficult to walk smoothly due to the following reasons: 1. As mentioned above, especially the wide-body hanging basket has many main trusses, and it is difficult to control synchronous walking; 2. Various components (including main trusses, bottom baskets, outer guide beams, etc.) The quantity is large, the weight is heavy, the center of gravity of the hanging basket is forward, the safety factor of the rear anchor is difficult to control, and the rear anchor is easy to fail, causing the hanging basket to overturn

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