Steel strand anchoring trolley for broken line pre-tensioning method I-shaped beam construction

Abstract

The utility model discloses a steel strand anchoring trolley for broken line pre-tensioning method I beam construction, which relates to the field of bridge construction precast beam slabs, and adopts the technical scheme that the steel strand anchoring trolley comprises two parallel rails, a trolley body is arranged on the rails in a sliding manner, and the trolley body comprises two parallel underframes; the two ends of each bottom frame are each rotationally provided with a rolling wheel, and the two rolling wheels on the same bottom frame roll in one track. A steel box is fixedly arranged in the middle of the upper surface of the bottom frame, a plurality of steel pipes penetrating through the steel box are arranged on the steel box, and steel strands are detachably connected into the steel pipes. A steel cylinder is further arranged on the steel box, a tensioning rod is arranged in the steel cylinder, one end of the tensioning rod is connected with a tensioning jack, and the tensioning jack is fixedly arranged on a concrete wall. The utility model has the beneficial effects that the steel box concrete structure is adopted, so that the structural stress is stable and reliable; the sliding base is made of channel steel and idler wheels and can slide according to pre-tensioning method pre-stress tensioning.

Description

Technical Field

[0001] The utility model relates to the field of prefabricated beams and slabs for bridge construction, in particular to a steel strand anchoring trolley used for the construction of I-beams using a folding line pre-tensioning method. Background Art

[0002] The research on the fold line pre-tensioned I-beam started earlier in foreign countries and has been widely used abroad. At present, the pre-tensioned hollow slab, T beam and box beam are widely used in China, and their construction equipment is mostly linear pre-tensioned. During the prestressing process, movable crossbeams are required at the ends to perform prestressing operations. However, due to the high vertical height of the prestress, the movable crossbeam of the fold line pre-tensioned I-beam cannot meet the prestressing of the fold line pre-tensioned I-beam. Utility Model Content

[0003] In view of the above technical problems, the utility model provides a steel strand anchoring trolley for use in the construction of I-beams using a broken-line pre-tensioning method.

[0004] The technical solution is as follows: it comprises two parallel tracks, on which a trolley body is slidably arranged, and the trolley body comprises two parallel bottom frames, which are fixedly connected by a crossbeam, and a roller is rotatably arranged at the two ends of each bottom frame, and the two rollers on the same bottom frame roll in one of the tracks;

[0005] A rectangular steel box is fixedly arranged in the middle of the upper surface of the base frame, and a plurality of steel pipes penetrating the steel box are respectively arranged at the upper end and the lower end of the steel box, and detachable connecting steel strands are arranged in the steel pipes;

[0006] Two steel cylinders are respectively provided in the middle and lower parts of the steel box, and the steel cylinders are respectively located on both sides of the steel box. A tension rod is arranged in the steel cylinder, one end of the tension rod is arranged in the steel cylinder, and the other end is connected to a tension jack, and the tension jack is fixedly arranged on the concrete wall.

[0007] Preferably, two stiffening plates are respectively arranged at the two ends of each of the steel cylinders, the two stiffening plates are respectively located on both sides of the steel cylinder, and the stiffening plates are fixedly arranged in the steel box.

[0008] Preferably, the steel box is fixedly connected to the base frame by bolts.

[0009] Preferably, the track is a channel steel, and the roller rolls in a groove of the channel steel.

[0010] Preferably, the steel box is filled with concrete.

[0011] The technical solution provided by the embodiment of the utility model has the following beneficial effects: a steel box concrete structure is adopted, and the structure is stable and reliable in force; a sliding base is made of channel steel and rollers, and can slide according to the prestressing method, thereby reducing the friction loss in the prestressing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0013] Figure 2 It is a side view of the trolley body of the embodiment of the utility model.

[0014] Figure 3 It is a front view of the trolley body of the embodiment of the utility model.

[0015] Among them, the figure markings are: 1. track; 2. trolley body; 3. base frame; 4. crossbeam; 5. roller; 6. steel box; 7. steel pipe; 8. steel strand; 9. steel cylinder; 10. tension rod; 11. tension jack; 12. concrete wall; 13. stiffening plate. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0017] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0018] In the description of the invention of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention of the 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 understood as a limitation on the invention of the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the present utility model, unless otherwise specified, "multiple" means two or more.

[0019] In the description of the invention of the utility model, it should be noted that, unless otherwise clearly specified 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention of the utility model can be understood according to specific circumstances.

[0020] Example 1

[0021] See also Figures 1 to 3 The utility model provides a steel strand anchoring trolley for the construction of I-beams by the folding line pre-tensioning method, comprising two parallel tracks 1, a trolley body 2 is slidably arranged on the track 1, the trolley body 2 comprises two parallel bottom frames 3, the two bottom frames 3 are fixedly connected by a crossbeam 4, the crossbeam 4 is fixed to the bottom frame 3 by welding, and forms a rolling base with the bottom frame 3, a roller 5 is rotatably arranged at each end of each bottom frame 3, and the two rollers 5 on the same bottom frame 3 roll in one of the tracks 1;

[0022] A rectangular steel box 6 is fixedly arranged in the middle of the upper surface of the bottom frame 3, and a plurality of steel pipes 7 penetrating the steel box 6 are arranged at the upper end and the lower end of the steel box 6, respectively, and detachable connecting steel strands 8 are arranged in the steel pipes 7;

[0023] Two steel cylinders 9 are respectively opened in the middle and lower parts of the steel box 6. The steel cylinders 9 are respectively located on both sides of the steel box 6. A tension rod 10 is arranged in the steel cylinder 9. One end of the tension rod 10 is arranged in the steel cylinder 9, and the other end is connected to the tension jack 11. The tension jack 11 is fixedly arranged on the concrete wall 12.

[0024] Two stiffening plates 13 are respectively arranged at the two ends of each steel cylinder 9 . The two stiffening plates 13 are respectively located at the two sides of the steel cylinder 9 . The stiffening plates 13 are fixedly arranged in the steel box 6 .

[0025] The stiffening plate 13 can improve the structural strength of the steel box 6 and prevent the steel box 6 from being deformed during use, thereby preventing the use of the steel box 6 from being affected.

[0026] The steel box 6 is fixedly connected to the base frame 3 by bolts.

[0027] This design facilitates the connection between the steel box 6 and the base frame 3. The steel box 6 is formed by welding a plurality of steel plates. After the steel box 6 is welded, the assembly of the trolley body 2 is completed by connecting with bolts.

[0028] The track 1 is a channel steel, and the roller 5 rolls in the groove of the channel steel. The channel steel has low cost, good mechanical properties, is easy to process, and can limit the moving track of the trolley body 2.

[0029] The steel box 6 is filled with concrete. The concrete can improve the overall structural strength of the steel box 6 on the one hand, and increase the weight of the steel box 6 on the other hand, making the steel box 6 more stable when in use.

[0030] When the utility model is used, the steel strand 8 is passed through the steel pipe 7 and fixedly arranged on the steel box 6, and the tensioning rod 10 is fixed to the tensioning jack 11 and the steel box 6. When the steel strand is tensioned, the tensioning jack 11 is started to pull the trolley body 2 to move toward the side of the concrete wall 12, and the plurality of steel strands 8 are synchronously driven by the trolley body 2 to realize the tensioning operation.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel strand anchoring trolley for the construction of I-beams using a folding line pre-tensioning method, characterized in that: It comprises two parallel rails (1), a trolley body (2) is slidably arranged on the rails (1), the trolley body (2) comprises two parallel bottom frames (3), the two bottom frames (3) are fixedly connected via a crossbeam (4), a roller (5) is rotatably arranged at the two ends of each bottom frame (3), and the two rollers (5) on the same bottom frame (3) roll in one of the rails (1); A rectangular steel box (6) is fixedly arranged in the middle of the upper surface of the base frame (3), and a plurality of steel pipes (7) penetrating the steel box (6) are respectively arranged at the upper end and the lower end of the steel box (6), and detachable connecting steel strands (8) are arranged in the steel pipes (7); Two steel cylinders (9) are respectively provided in the middle and lower parts of the steel box (6). The steel cylinders (9) are respectively located on both sides of the steel box (6). A tension rod (10) is arranged in the steel cylinder (9). One end of the tension rod (10) is arranged in the steel cylinder (9), and the other end is connected to a tension jack (11). The tension jack (11) is fixedly arranged on a concrete wall (12).

2. The steel strand anchoring trolley for the construction of I-beams using the folding line pre-tensioning method according to claim 1 is characterized in that: Two stiffening plates (13) are respectively arranged at the two ends of each steel cylinder (9); the two stiffening plates (13) are respectively located on two sides of the steel cylinder (9); and the stiffening plates (13) are fixedly arranged in the steel box (6).

3. The steel strand anchoring trolley for the construction of I-beams using the folding line pre-tensioning method according to claim 1 is characterized in that: The steel box (6) is fixedly connected to the base frame (3) by means of bolts.

4. The steel strand anchoring trolley for the construction of I-beams using the folding line pre-tensioning method according to claim 1 is characterized in that: The track (1) is a channel steel, and the roller (5) rolls in a groove of the channel steel.

5. The steel strand anchoring trolley for the construction of I-beams using the folding line pre-tensioning method according to claim 3 is characterized in that: The steel box (6) is filled with concrete.

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