Counter-force beam prepressing device

Abstract

The utility model provides a counter-force beam prepressing device, which relates to the technical field of counter-force beams and comprises a plurality of counter-force beams arranged in parallel, and a hinged support is arranged at the center of the bottom end of each counter-force beam. A counter-force supporting leg is mounted on the bottom surface of the rear end of the counter-force beam, and a supporting plate is mounted on the bottom surface of the counter-force supporting leg; the counter-force beams are connected through a plurality of parallel connectors, connecting plates are arranged between the parallel connectors and the counter-force beams, and the parallel connectors, the connecting plates and the counter-force beams are fixedly connected. The utility model has the advantages that the occupied area is small, the operation is simple and convenient, the investment of mechanical equipment is less, the safety risk is effectively reduced when the operation is carried out on a concrete structure with higher height (more than 100m), meanwhile, the utility model can be manufactured on site by using construction materials or used as a tool, and can be reused in the prepressing process, so that the working time is saved, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction beams, in particular to a reaction beam preloading device. Background Technique

[0002] In engineering practice, the bearing capacity of components is usually tested by the method of surcharge preloading or the tensioning of steel strands, and the elastic deformation of components is controlled, and even the inelastic deformation is eliminated. However, both surcharge preloading and steel strand tensioning have obvious disadvantages. For example, surcharge preloading takes a long time, requires a large amount of surcharge materials, the stacking difficulty of surcharge materials is difficult to control and there are certain safety risks. When the steel strand tensioning faces a concrete structure with a height greater than 100 meters, the required length of the steel strand also increases accordingly. The relaxation and angle change of the steel strand have a great impact on the calculation accuracy, and it is difficult to control the final effect. Content of the Utility Model

[0003] The utility model provides a reaction beam preloading device, aiming to solve the problem that the traditional construction method is not suitable and the safety risk is relatively high when facing a concrete structure with a height greater than 100 meters.

[0004] The utility model provides the following technical solutions to achieve the above purpose:

[0005] A reaction beam preloading device includes a plurality of reaction beams arranged in parallel. A hinge seat is arranged at the central position of the bottom end of the reaction beam; a reaction support leg is installed on the bottom surface of the rear end of the reaction beam, and a support plate is installed on the bottom surface of the reaction support leg; the reaction beams are connected by a plurality of horizontal bracings, a connecting plate is arranged between the horizontal bracing and the reaction beam, and the horizontal bracing, the connecting plate and the reaction beam are fixedly connected.

[0006] Furthermore, the reaction beam is made of at least two I-beams, and the adjacent I-beams are fixedly connected by the long sides of the upper and lower flange plates.

[0007] Furthermore, the hinge seat includes an upper hinge seat and a lower hinge seat, and the upper hinge seat and the lower hinge seat are connected by a pin; a plurality of groups of stiffening plates I are arranged at the top of the upper hinge seat and the bottom of the lower hinge seat. Each group of stiffening plates I includes triangular stiffening plates symmetrically arranged on both sides of the hinge seat and rectangular stiffening plates arranged in the middle of the hinge seat.

[0008] Furthermore, a plurality of groups of stiffening plates II are arranged on the reaction beam. One group includes a plurality of stiffening plates II symmetrically arranged on both sides of the web of the I-beam. The side edges of the stiffening plates II are connected to the upper flange plate, the web and the lower flange plate of the I-beam.

[0009] Furthermore, triangular stiffening plates are arranged around the upper and lower ends of the reaction leg. The side edges of the triangular stiffening plate at the upper end are connected to the reaction beam and the reaction leg, and the side edges of the triangular stiffening plate at the lower end are connected to the reaction leg and the support plate. Compared with the prior art, the present utility model has the following beneficial effects:

[0010] 1. The present utility model can be fabricated on-site using construction materials or used as a tooling and reused in the preloading process, saving man-hours and improving economic benefits.

[0011] 2. The present utility model occupies a small area, is easy to operate, requires less investment in mechanical equipment, and effectively reduces safety risks when operating on concrete structures with a relatively high height (>100m). BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below only relate to some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic cross-sectional structure diagram of the jack part of the present utility model;

[0015] Figure 3 is a schematic cross-sectional structure diagram of the hinge seat part of the present utility model;

[0016] Figure 4 is a schematic cross-sectional structure diagram of the reaction leg part of the present utility model;

[0017] Figure 5 is a schematic top view structural diagram of the reaction beam system of the present utility model;

[0018] Reference numerals: 1 - reaction beam; 2 - hinge seat; 3 - reaction leg; 4 - support plate; 5 - horizontal bracing; 6 - stiffening plate I; 7 - stiffening plate II; 8 - triangular stiffening plate; 9 - connecting plate; A - jack; B - preloading working surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to enable those skilled in the art to better understand the solutions of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model.

[0020] It should be noted that in the present utility model: The terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices; The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present utility model and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation or be constructed and operated in a specific orientation; The terms "first", "second", etc. are used to distinguish similar objects and need not be used to describe a specific order or sequence; The terms "installed", "set up", "provided with", "connected", "connected to", "socketed", etc. should be understood in a broad sense; For example, it can be a fixed connection, a detachable connection, or an integral structure; It can be a mechanical connection or an electrical connection; It can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. And, in addition to being able to represent the orientation or positional relationship, some terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to specific circumstances.

[0021] Embodiment. A reaction beam preloading device, the structure is referred to as Figures 1-5 , including a plurality of reaction beams 1 arranged in parallel. A hinge seat 2 is arranged at the central position of the bottom end of the reaction beam 1; A reaction support leg 3 is installed on the bottom surface at the rear end of the reaction beam 1, and a support plate 4 is installed on the bottom surface of the reaction support leg 3; The reaction beams 1 are connected by a plurality of horizontal bracings 5, and a connecting plate 9 is arranged between the horizontal bracing 5 and the reaction beam 1, and the horizontal bracing 5, the connecting plate 9 and the reaction beam 1 are fixedly connected. The reaction support leg 3 is made by connecting I-beams side by side, preferably 22a I-beams; The horizontal bracing 5 is made of channel steel to ensure the structural strength.

[0022] The reaction beam 1 is made of at least two I-beams, and the adjacent I-beams are fixedly connected by the long sides of the upper and lower flange plates. The reaction beam 1 is preferably made of 56a I-beams to ensure the structural strength.

[0023] The hinge seat 2 includes an upper hinge seat and a lower hinge seat, which are connected by a pin; several groups of stiffening plates I 6 are provided at the top of the upper hinge seat and the bottom of the lower hinge seat. Each group of stiffening plates I 6 includes triangular stiffening plates symmetrically arranged on both sides of the hinge seat and rectangular stiffening plates arranged in the middle of the hinge seat. The provision of the stiffening plates I 6 improves the stress performance of the hinge seat and ensures that no plastic deformation occurs during use.

[0024] Several groups of stiffening plates II 7 are provided on the reaction beam 1. One group includes multiple stiffening plates II 7 symmetrically arranged on both sides of the web of the I-beam. The sides of the stiffening plates II 7 are connected to the upper flange plate, the web and the lower flange plate of the I-beam. The several groups of stiffening plates II 7 are respectively arranged at the front end, the section for installing the hinge seat 2 and the section for installing the reaction support leg 3 on the reaction beam 1. By providing the stiffening plates II 7, the bending and shear resistance capabilities of the reaction beam 1 are increased, and it is ensured that no strength failure occurs during use.

[0025] Triangular stiffening plates 8 are arranged around the upper and lower ends of the reaction support leg 3. The sides of the triangular stiffening plates 8 at the upper end are connected to the reaction beam 1 and the reaction support leg 3, and the sides of the triangular stiffening plates 8 at the lower end are connected to the reaction support leg 3 and the support plate 4. The provision of the triangular stiffening plates 8 ensures the force transmission effect of the reaction support leg 3.

[0026] Working principle and usage method of the utility model: First, lay a layer of I-beams evenly on the preloading working surface to ensure that the I-beams fully cover the preloading working surface. Then, lay at least one I-beam perpendicular to the direction of the I-beams on it to provide a working surface for the jack. The above steps can also be replaced by other materials, and the purpose is to convert the force generated by the jack into a uniformly distributed load and apply it to the preloading working surface. After installing the jack on the I-beam, install a hinge seat 2 on one side of the jack, and preferably fix the hinge seat 2 to the ground in an anchoring form. Install a reaction beam 1 on the hinge seat 2, and install a reaction support leg 3 at the rear end of the reaction beam 1. The bottom surface of the reaction support leg 3 is connected to a support plate 4, and the support plate 4 directly contacts the ground. To ensure the working effect during the preloading process, the hinge seat 2 and the support plate 4 preferably rest on a solid working surface, such as a concrete plane. During the installation process, ensure that the part of the reaction beam 1 with a stiffening plate II 7 installed at the front end is in close contact with the jack rod. The reaction beams 1 are connected to each other through a lateral bracing 5. A connecting plate 9 is provided between the lateral bracing 5 and the reaction beam 1. The lateral bracing 5, the connecting plate 9 and the reaction beam 1 are connected by U-bolts. The U-bolts can avoid causing damage to the reaction beam 1 and only make holes in the lateral bracing 5 and the connecting plate 9. During use, one reaction beam 1 is paired with one jack, and the number of jacks is determined according to the actual engineering needs. During the preloading process, one or more jacks cooperate to lift. The force is transmitted through the reaction beam 1 and the hinge seat 2 to the reaction support leg 3 until the connecting plate 9 squeezes the ground to generate a reaction force, thereby squeezing the preloading working surface. Compared with the existing technology of surcharge preloading and steel strand reverse tensioning, this reaction beam preloading device occupies a small area, is easy to operate, requires less mechanical equipment investment, and significantly reduces the safety risk. Moreover, under some special construction conditions, such as when the average height of the rigid frame transition pier exceeds 100m, it is too difficult to use surcharge preloading and steel strand reverse tensioning due to site conditions. Using this reaction beam preloading device can well adapt to this factory condition.

[0027] Obviously, the above description is only a part of the embodiments of the present utility model, not all of them. The above embodiments do not limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any combination, modification, equivalent replacement, improvement and all other embodiments that can be made by those of ordinary skill in the art within the spirit and principle of the present utility model should be within the protection scope of the present utility model.

Claims

1. A reaction beam preloading device, characterized in that: The invention comprises a plurality of reaction beams (1) arranged in parallel, wherein a hinge seat (2) is provided at the center position of the bottom end of the reaction beam (1); a reaction leg (3) is installed on the bottom surface of the rear end of the reaction beam (1), and a support plate (4) is installed on the bottom surface of the reaction leg (3); the reaction beams (1) are connected by a plurality of parallel joints (5), a connecting plate (9) is provided between the parallel joints (5) and the reaction beams (1), and the parallel joints (5), the connecting plate (9) and the reaction beams (1) are fixedly connected.

2. The reaction beam preloading device according to claim 1, characterized in that: The reaction beam (1) is made of at least two I-beams, and adjacent I-beams are fixedly connected via the long sides of upper and lower flange plates.

3. The reaction beam preloading device according to claim 1, characterized in that: The hinge seat (2) comprises an upper hinge seat and a lower hinge seat, and the upper hinge seat and the lower hinge seat are connected by a pin; a plurality of groups of stiffening plates I (6) are arranged at the top of the upper hinge seat and the bottom of the lower hinge seat, and each group of stiffening plates I (6) comprises triangular stiffening plates symmetrically arranged on both sides of the hinge seat and a rectangular stiffening plate arranged in the middle of the hinge seat.

4. The reaction beam preloading device according to claim 1, characterized in that: The reaction beam (1) is provided with a plurality of groups of stiffening plates II (7), one group comprising a plurality of stiffening plates II (7) symmetrically arranged on both sides of the web of the I-beam, the side edges of the stiffening plates II (7) being connected to the upper flange plate, the web and the lower flange plate of the I-beam.

5. The reaction beam preloading device according to claim 1, characterized in that: The upper and lower ends of the reaction leg (3) are surrounded by triangular stiffening plates (8); the side of the triangular stiffening plate (8) at the upper end is connected to the reaction beam (1) and the reaction leg (3); and the side of the triangular stiffening plate (8) at the lower end is connected to the reaction leg (3) and the support plate (4).

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