Pre-tensioning method prestressed concrete plate beam

Abstract

The utility model belongs to the technical field of engineering construction, and particularly relates to a pre-tensioning method prestressed concrete plate beam which comprises a concrete plate beam body formed by concrete pouring and a forming base plate. Plate-shaped formworks are symmetrically installed on the top of the forming base plate and located on the two sides of the concrete plate beam body, lead screw sliding blocks are symmetrically and fixedly connected to the positions, close to the two sides, of the bottoms of the formworks, and linear guide rails corresponding to the lead screw sliding blocks are arranged on the peripheries of the lead screw sliding blocks and located at the bottom of the concrete plate beam body. The lead screw sliding blocks are slidably connected with the linear guide rails, auxiliary sliding blocks are correspondingly and fixedly connected to the positions, close to the lead screw sliding blocks, of the bottom of the mold plate, and auxiliary sliding grooves are correspondingly formed in the positions, located on the top of the forming base plate, of the peripheries of the auxiliary sliding blocks. The pre-tensioning pre-stressed concrete plate beam has the advantages that when the pre-tensioning pre-stressed concrete plate beam is prefabricated, mold splitting can be effectively stabilized, and damage to the surface of the pre-tensioning pre-stressed concrete plate beam is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering construction, and particularly relates to a pre-tensioned prestressed concrete slab beam. Background Technique

[0002] The pre-tensioned prestressed concrete slab beam is a concrete slab beam made by the pre-tensioning method. Prestressed concrete refers to a method of prestressing concrete components during the prefabrication process to improve the crack resistance of reinforced concrete components and avoid premature cracking of reinforced concrete components, thereby improving the performance of the components. The manufacturing method of tensioning the steel bars before pouring concrete is called the pre-tensioning method;

[0003] In the prior art, in order to improve the performance of the concrete slab beam, the pre-tensioning method is generally used to manufacture the concrete slab beam. The prefabricated pre-tensioned prestressed concrete slab beam has the advantages of high quality control level, good durability of components, high formwork turnover rate, and small loss. Therefore, the existing pre-tensioned prestressed concrete slab beams are generally prefabricated parts. During the production of the prefabricated parts, after the concrete slab beam is formed, damage to the surface of the concrete slab beam is likely to occur during demolding, and the demolding is not stable enough. Therefore, we propose a pre-tensioned prestressed concrete slab beam. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pre-tensioned prestressed concrete slab beam to solve the technical problem that the demolding of the prefabricated pre-tensioned prestressed concrete slab beam is not stable enough, and achieve the purpose of more stable demolding.

[0005] To solve the above technical problem, the utility model provides a pre-tensioned prestressed concrete slab beam, which includes a concrete slab beam body formed by concrete pouring and a forming substrate. On the top of the forming substrate and symmetrically on both sides of the concrete slab beam body, plate-shaped templates are installed. At both sides near the bottom of the templates, screw rod sliders are symmetrically and fixedly connected. Linear guide rails corresponding to the screw rod sliders are respectively opened at the bottom of the concrete slab beam body around the periphery of the screw rod sliders, and the screw rod sliders are slidably connected with the linear guide rails. At one side near the screw rod sliders at the bottom of the templates, auxiliary sliders are respectively and fixedly connected. Auxiliary chutes corresponding to the auxiliary sliders are respectively opened at the top of the forming substrate around the periphery of the auxiliary sliders, and the size of the auxiliary chutes is the same as that of the linear guide rails, and the auxiliary sliders are slidably connected with the auxiliary chutes.

[0006] Furthermore, several prestressed steel bars are fixedly connected to the inside of the templates and extend to both sides. Fixed crossbeams are symmetrically installed around the periphery of the prestressed steel bars near the concrete slab beam body, and the prestressed steel bars penetrate through the fixed crossbeams and are slidably connected with the fixed crossbeams. The fixed crossbeams are fixedly connected with the forming substrate.

[0007] Further, movable crossbeams are symmetrically installed on both sides of the periphery of the prestressed tendon and on top of the forming substrate. Jacks are correspondingly installed on one side of each movable crossbeam facing the fixed crossbeam, and the fixed ends of the jacks are fixedly connected to the fixed crossbeam, and the output ends are fixedly connected to the movable crossbeam.

[0008] Through the above technical solution: The movable crossbeam can be effectively jacked open by the jack, so that the prestressed tendon can be effectively tensioned by jacking open the movable crossbeam.

[0009] Further, on the opposite side surfaces of the fixed crossbeam and on the periphery of the prestressed tendon, first anchor clamps are sleeved correspondingly around the prestressed tendon, and on the opposite side surfaces of the movable crossbeam and on the periphery of the prestressed tendon 31, second anchor clamps are sleeved correspondingly around the prestressed tendon.

[0010] Through the above technical solution: The prestress 31 can be fixed by the first anchor clamp and the second anchor clamp, so that the prestressed tendon can be better tensioned.

[0011] Further, a lead screw is installed inside the linear guide rail and passes through the lead screw slider. The lead screw is rotatably connected to the linear guide rail, and the lead screw intersects with the lead screw slider in a threaded manner.

[0012] Further, protective boxes are fixedly connected to both sides of the forming substrate corresponding to the linear guide rails, and dust-proof and heat-dissipating nets are installed on the sides of the protective boxes away from the forming substrate.

[0013] Further, drive motors are installed inside the protective boxes. The drive motors are fixedly connected to the forming substrate, and the output ends of the drive motors penetrate into the interior of the linear guide rail and are fixedly connected to the lead screw.

[0014] Through the above technical solution: The drive motor can effectively apply a driving force to the lead screw, thereby driving the lead screw to rotate.

[0015] The beneficial effects of the present utility model are:

[0016] 1. Through the setting of the lead screw slider, the drive motor can effectively drive the lead screw to rotate. When the lead screw rotates, the lead screw slider that intersects with the lead screw in a threaded manner can move inside the linear guide rail. When the lead screw slider moves inside the linear guide rail, the linear guide rail can ensure the stability of the lead screw slider and can limit the lead screw slider at the same time to make it move linearly. In this way, the template can be stably driven by the lead screw slider to move, so that the template can be stably demolded from the concrete slab beam body, thereby effectively avoiding damage to the concrete slab beam body during the demolding process.

[0017] 2. By setting the auxiliary slider, the auxiliary slider is fixedly connected to the template. When the screw slider drives the template to separate the mold, the auxiliary slider also moves in the auxiliary chute at the same time. Thus, the movement of the auxiliary slider in the auxiliary chute can further improve the stability during the mold separation of the template, so as to achieve stable mold separation and avoid damaging the concrete slab beam. Through the setting of the template, the template can effectively limit the concrete, enabling the concrete to be poured into a qualified concrete slab beam body.

[0018] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are 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.

[0020] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is a schematic diagram of a partial structure of the present utility model;

[0022] Figure 3 is a schematic diagram of the anatomical structure of the protective box of the present utility model.

[0023] In the figure:

[0024] 1. Concrete slab beam body;

[0025] 2. Forming substrate; 21. Protective box; 22. Dust-proof and heat-dissipating net;

[0026] 3. Template; 31. Prestressed tendon; 32. Fixed crossbeam; 33. Movable crossbeam; 34. Jack; 35. First anchor fixture; 36. Second anchor fixture;

[0027] 4. Screw slider;

[0028] 5. Linear guide rail; 51. Screw rod; 52. Driving motor;

[0029] 6. Auxiliary slider;

[0030] 7. Auxiliary chute. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the scope of protection of the present utility model.

[0032] Embodiment:

[0033] As Figures 1 to 3 shown, a pretensioned prestressed concrete slab beam includes: a concrete slab beam body 1 formed by concrete pouring and a forming substrate 2. On the top of the forming substrate 2 and symmetrically installed on both sides of the concrete slab beam body 1 are plate-shaped templates 3. The templates 3 can help the concrete slab beam body 1 to be formed. At both sides near the bottom of the templates 3 are symmetrically fixedly connected with screw rod sliders 4. Corresponding to the screw rod sliders 4, linear guides 5 are provided at the bottom of the concrete slab beam body 1, and the screw rod sliders 4 are slidably connected to the linear guides 5. At the bottom of the templates 3 and on one side near the screw rod sliders 4 are symmetrically fixedly connected with auxiliary sliders 6. Corresponding to the auxiliary sliders 6, auxiliary chutes 7 are provided on the top of the forming substrate 2, and the size of the auxiliary chutes 7 is the same as that of the linear guides 5, and the auxiliary sliders 6 are slidably connected to the auxiliary chutes 7.

[0034] Embodiment 2

[0035] This embodiment includes: several prestressing tendons 31 are fixedly connected to the two sides by extending inside the template 3. Symmetrically installed near the concrete slab beam body 1 around the prestressing tendons 31 are fixed crossbeams 32, and the prestressing tendons 31 penetrate through the fixed crossbeams 32 and are slidably connected to the fixed crossbeams 32. The fixed crossbeams 32 are fixedly connected to the forming substrate 2. By means of the fixed crossbeams 32, it is convenient to provide support points, so as to facilitate the jack 34 and the movable crossbeam 33 to tension the prestressing tendons 31.

[0036] Symmetrically installed on both sides of the top of the forming substrate 2 around the prestressing tendons 31 are movable crossbeams 33. On one side of the movable crossbeams 33 facing the fixed crossbeams 32 are symmetrically installed jacks 34. The fixed ends of the jacks 34 are fixedly connected to the fixed crossbeams 32, and the output ends are fixedly connected to the movable crossbeams 33. The jacks 34 can effectively apply the force required for tensioning and clamping the prestressing tendons 31.

[0037] On the opposite side of the fixed crossbeam 32 and around the prestressed tendon 31, a first anchor fixture 35 is sleeved corresponding to the prestressed tendon 31. On the opposite side of the movable crossbeam 33 and around the prestressed tendon 31, a second anchor fixture 36 is sleeved corresponding to the prestressed tendon 31. The first anchor fixture 35 and the second anchor fixture 36 facilitate the fixation of the prestressed tendon 31, thereby facilitating the tensioning of the prestressed tendon 31.

[0038] Inside the linear guide rail 5, a lead screw 51 passing through the lead screw slider 4 is also installed. The lead screw 51 is rotatably connected to the linear guide rail 5, and the lead screw 51 intersects with the lead screw slider 4 in a threaded manner. When the lead screw 51 rotates, it can effectively drive the lead screw slider 4 to slide inside the linear guide rail 5, so that the template 3 can be pulled through the lead screw slider 4.

[0039] On both sides of the forming substrate 2, protective boxes 21 are fixedly connected corresponding to the linear guide rails 5. Dust-proof and heat-dissipating nets 22 are installed on the sides of the protective boxes 21 away from the forming substrate 2. The protective boxes 21 can effectively protect the drive motors 52, thereby avoiding damage to the drive motors 52 during the production of precast components.

[0040] Inside the protective boxes 21, drive motors 52 are installed. The drive motors 52 are fixedly connected to the forming substrate 2, and the output ends of the drive motors 52 penetrate into the inside of the linear guide rail 5 and are fixedly connected to the lead screw 51. The drive motors 52 can effectively drive the lead screw 51 to rotate.

[0041] In summary, through the design of the present utility model, during the prefabrication of pretensioned prestressed concrete slab girders, the mold can be stably split, avoiding damage to its surface.

[0042] In this application, each selected device is a general standard part or a component known to those skilled in the art, and its structure and principle can be known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0043] In the description of the embodiments of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0044] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0045] Based on the above enlightenment from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A pre-tensioned prestressed concrete slab beam, characterized in that Including: A concrete slab beam body (1) and a forming substrate (2) made of concrete. On the top of the forming substrate (2) and symmetrically installed on both sides of the concrete slab beam body (1), there are plate-shaped templates (3). Near both sides of the bottom of the template (3), screw rod sliders (4) are symmetrically fixed. Around the screw rod sliders (4) and at the bottom of the concrete slab beam body (1), linear guides (5) are correspondingly opened for the screw rod sliders (4), and the screw rod sliders (4) are slidably connected with the linear guides (5). On the bottom of the template (3) and on one side close to the screw rod sliders (4), auxiliary sliders (6) are correspondingly fixed. Around the auxiliary sliders (6) and on the top of the forming substrate (2), auxiliary chutes (7) are correspondingly opened, and the size of the auxiliary chutes (7) is the same as that of the linear guides (5), and the auxiliary sliders (6) are slidably connected with the auxiliary chutes (7).

2. A pretensioned prestressed concrete slab beam according to claim 1, characterized in that, Inside the template (3) and extending to both sides, there are several prestressed tendons (31). Symmetrically installed around the prestressed tendons (31) and close to the concrete slab beam body (1), there are fixed crossbeams (32), and the prestressed tendons (31) penetrate through the fixed crossbeams (32) and are slidably connected with the fixed crossbeams (32). The fixed crossbeams (32) are fixed to the forming substrate (2).

3. The pretensioned prestressed concrete slab beam according to claim 2, wherein Around the prestressed tendons (31) and symmetrically installed on both sides of the top of the forming substrate (2), there are movable crossbeams (33). On one side of the movable crossbeams (33) facing the fixed crossbeams (32), jacks (34) are correspondingly installed, and the fixed ends of the jacks (34) are fixed to the fixed crossbeams (32), and the output ends are fixed to the movable crossbeams (33).

4. A pretensioned prestressed concrete slab beam as claimed in claim 3, characterized in that, On the opposite side of the fixed crossbeams (32) and around the prestressed tendons (31), first anchor clamps (35) are correspondingly sleeved on the prestressed tendons (31). On the opposite side of the movable crossbeams (33) and around the prestressed tendons (31), second anchor clamps (36) are correspondingly sleeved on the prestressed tendons (31).

5. A pretensioned prestressed concrete slab beam according to claim 1, characterized in that, Inside the linear guide (5), there is also a screw rod (51) penetrating through the screw rod slider (4). The screw rod (51) is rotatably connected with the linear guide (5), and the screw rod (51) intersects with the screw rod slider (4) in a threaded manner.

6. A pretensioned prestressed concrete slab beam according to claim 1, characterized in that, On both sides of the forming substrate (2), protective boxes (21) are fixed corresponding to the linear guides (5). On one side of the protective boxes (21) away from the forming substrate (2), dust-proof and heat-dissipating nets (22) are installed.

7. A pre-tensioned prestressed concrete slab beam according to claim 6, characterized in that, Inside the protective boxes (21), drive motors (52) are installed. The drive motors (52) are fixed to the forming substrate (2), and the output ends of the drive motors (52) penetrate into the inside of the linear guide (5) and are fixed to the screw rod (51).

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