Positioning device for embedded steel bars of cast-in-place pier body of high-speed railway

Abstract

The utility model provides a high-speed railway cast-in-place pier body embedded steel bar positioning device which is characterized in that a plurality of supporting rods are uniformly distributed in the circumferential direction of a pier body steel bar framework, the lower ends of the supporting rods are fixed on corresponding bearing platform steel bars, and supporting stations are arranged on the supporting rods; the positioning frame is matched with the pier body reinforcement cage in shape, and the positioning frame is correspondingly fixed to the supporting station to form a supporting structure corresponding to the inner side of the pier body reinforcement cage; a plurality of limiting notches corresponding to longitudinal bars of the pier body steel reinforcement framework are formed in the periphery of the positioning frame, so that the longitudinal bars of the pier body steel reinforcement framework are positioned. The device is easy to operate, economical and reliable, the device is matched with an on-site bearing platform, the distance and the number of the steel bars can be rapidly and accurately positioned, then the perpendicularity of the steel bars of a pier body is guaranteed, longitudinal bars of the pier steel bars can be effectively controlled, the quality of a pier is improved, the overall quality of a railway is enhanced, and overall safety is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of high-speed railway technology, specifically relating to a positioning device for pre-embedded steel bars in cast-in-place piers of high-speed railways. Background Technology

[0002] Currently, the construction process for high-speed railway bridges typically involves constructing the pile foundations in place, then the abutments, and finally the piers and bearing pads, followed by the bridge deck and ancillary structures. During abutment construction, the longitudinal reinforcement bars for the piers need to be pre-embedded. However, the large number and excessive length of these pre-embedded bars during abutment construction lead to insufficient quantity and overturning of some bars, resulting in insufficient protective layers for certain reinforcements. This presents significant quality risks during pier construction, posing a substantial safety hazard to the later use and operation of the high-speed railway.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides a positioning device for pre-embedded steel bars in cast-in-place piers of high-speed railways.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A positioning device for pre-embedded reinforcing bars in cast-in-place piers of high-speed railways includes:

[0007] Support rods, multiple support rods are evenly distributed around the circumference of the pier body steel reinforcement skeleton, the lower end of the support rods is fixed to the corresponding pier cap steel reinforcement, and support positions are provided on the support rods;

[0008] The positioning frame is adapted to the shape of the pier body steel reinforcement skeleton and is fixed on the support position to form a support structure on the inner side of the corresponding pier body steel reinforcement skeleton.

[0009] Multiple limiting notches are provided on the outer periphery of the positioning frame, each corresponding to a longitudinal bar of the pier steel reinforcement cage, in order to position the longitudinal bar of the pier steel reinforcement cage.

[0010] Preferably, the support station is a support plate welded to the outside of the support rod, and the support plate is horizontally distributed.

[0011] Preferably, the support plate is provided with screw holes, and the positioning frame is fixed to the support plate by bolts.

[0012] Preferably, the outer side of the support rod is provided with a rib corresponding to the support plate.

[0013] Preferably, the support rod comprises multiple segments spliced ​​together. At the splice point of two adjacent support rod segments, the support plate is located at the upper end of the lower support rod segment; the lower end of the upper support rod segment is provided with a clamping plate corresponding to the support plate to clamp the positioning frame.

[0014] Preferably, the support rod is a square steel pipe, and in two adjacent support rod sections, the lower end of the upper support rod section is provided with a joint, which extends into the lower support rod section.

[0015] Preferably, the positioning frame includes multiple splicing units that are spliced ​​together, with two adjacent splicing units spliced ​​together above the support plate.

[0016] Preferably, the splicing unit includes straight rods and curved rods, which are spliced ​​together to form a waist-shaped ring corresponding to the steel reinforcement skeleton of the pier body.

[0017] Preferably, the support rod is fixed to the foundation steel bars by welding.

[0018] Beneficial effects: This application is simple to operate, economical and reliable. When used in conjunction with the on-site pier cap, it can quickly and accurately locate the spacing and quantity of reinforcing bars, thereby ensuring the verticality of the reinforcing bars in the pier body, effectively controlling the longitudinal reinforcement of the pier, improving the quality of the pier, strengthening the overall quality of the railway, and ensuring overall safety. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0020] Figure 1 This is a schematic diagram of the assembly of the positioning frame in a specific embodiment provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the assembly of the support rod in a specific embodiment provided by this utility model;

[0022] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0023] In the diagram: 1. Positioning frame; 2. Support rod; 3. Clamping plate; 4. Limiting notch; 5. Joint; 6. Support plate; 7. Foundation reinforcement. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0025] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0027] like Figure 1-3 As shown, this application provides a positioning device for pre-embedded reinforcing bars in cast-in-place piers of high-speed railways. This device fixes the longitudinal reinforcing bars above the pier cap reinforcing bars 7, thereby ensuring the verticality of the reinforcing bars in the pier body and effectively controlling the protective layer of the pier reinforcing bars. The reinforcing bar positioning device includes support rods 2 and positioning frames 1. Multiple support rods 2 are evenly distributed around the pier body reinforcing bar skeleton. Generally, the number of support rods 2 is designed according to the pier body cross-section size, with at least two support rods 2 on the straight side of the pier body and one support rod 2 on the curved side of the pier body. The lower end of the support rod 2 is fixed to the corresponding pier cap reinforcing bar 7. Support positions are provided on the support rods 2, and these positions have flat support surfaces for supporting the positioning frame 1. The positioning frame 1 is adapted to the shape of the pier body reinforcing bar skeleton, thus forming a support inside the pier body reinforcing bar skeleton. The positioning frame 1 is correspondingly fixed on the support positions to form a support structure inside the corresponding pier body reinforcing bar skeleton, thereby controlling the longitudinal reinforcing bars of the pier body reinforcing bar skeleton. Multiple limiting notches 4 are provided on the outer periphery of the positioning frame 1, corresponding to the longitudinal reinforcing bars of the pier body reinforcing bar skeleton, to position the longitudinal reinforcing bars of the pier body reinforcing bar skeleton. The limiting notch 4 is semi-circular, and its corresponding diameter is adapted to the diameter of the longitudinal reinforcement. The spacing between the limiting notches 4 is adapted to the spacing between the longitudinal reinforcements.

[0028] In an optional embodiment, the support station is a support plate 6 welded to the outside of the support rod 2. The width of the support plate 6 is adapted to the width of the positioning frame 1. The support plate 6 is horizontally distributed to support the positioning frame 1.

[0029] In this embodiment, the positioning frame 1 is a strip steel plate adapted to the pier body steel reinforcement skeleton, and the support plate 6 is a steel plate. Both the support plate 6 and the positioning frame 1 are provided with screw holes. The positioning frame 1 is fixed to the support plate 6 by bolts, thereby fixing the support rod 2 and the positioning frame 1 to form a stable connection relationship and ensure the support of the longitudinal reinforcement.

[0030] In addition, the outer side of the support rod 2 is provided with ribs corresponding to the support plate 6. The strength of the support plate 6 is ensured by the support of the ribs, thus ensuring the stability of the support.

[0031] For longitudinal reinforcements of different lengths, this application provides multiple support rods 2, which are spliced ​​together longitudinally. At the splice of two adjacent support rods 2, the support plate 6 is located at the upper end of the lower support rod 2. In addition, a clamping plate corresponding to the support plate 6 is provided at the lower end of the upper support rod 2. When two adjacent support rods 2 are spliced, they can cooperate with the support plate 6 to clamp the positioning frame 1, thereby ensuring the stability of the splice.

[0032] The clamping plate 3 is made of steel plate, and corresponding screw holes for the support plate 6 are provided on the clamping plate 3, so that the clamping plate 3, the positioning frame 1 and the support plate 6 can form a stable connection relationship through the fixing of bolts.

[0033] In this embodiment, the support rod 2 is a square steel pipe. The lower end of the square steel pipe abuts against the upper surface of the foundation, and the side is close to the foundation reinforcement 7. It is fixed to the foundation reinforcement 7 by welding. Furthermore, the foundation reinforcement 7 is pre-embedded before the foundation is poured to connect the support rod 2. The width of the support rod 2 is adapted to the spacing between the two pre-embedded foundation reinforcement 7, so that the support rod 2 can be welded on both sides.

[0034] In two adjacent support rods 2, the upper support rod 2 has a joint 5 at its lower end. The joint 5 is square and fits into the inner cavity of the support rod 2, allowing it to extend into the lower support rod 2. This reduces installation difficulty and further improves splicing stability. The uppermost support rod 2 does not require a clamping plate 3.

[0035] In this embodiment, the positioning frame 1 includes multiple splicing units that are spliced ​​together. Two adjacent splicing units are spliced ​​together above the support plate 6. This splicing relationship simplifies the structure of the positioning frame 1 and improves the installation efficiency of the positioning device. The splicing unit includes straight rods and curved rods, which are spliced ​​together to form a waist-shaped ring corresponding to the steel reinforcement skeleton of the pier body. The number and length of the straight rods and the radius corresponding to the curved rods are customized and selected according to the actual pier body cross section.

[0036] In an optional embodiment, the reinforcement positioning is performed using the following method: First, according to the design plan, the foundation pad and reinforcement binding are constructed; second, the position of the support rod 2 is located and marked; third, the foundation concrete is poured; fourth, the positioning device is installed, using 100mm×50mm square steel as the support rod 2, with a length of 1.25m. The support rod 2 is welded to the foundation reinforcement 7 on one side, and the weld length should not be less than 50cm. Then, the positioning frame 1 is assembled; fifth, the pre-embedded longitudinal reinforcement of the pier body is installed according to the outer hole positions of the positioning frame 1. After the reinforcement is installed, the pre-embedded reinforcement of the pier body is reinforced with tie wire, and the support rod 2 segment is selected according to the length of the longitudinal reinforcement; sixth, after the horizontal stirrups of the pier body are installed, the positioning device is disassembled in sections.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. A positioning device for pre-embedded reinforcing bars in cast-in-place piers of high-speed railways, characterized in that, include: Support rods, multiple support rods are evenly distributed around the circumference of the pier body steel reinforcement skeleton, the lower end of the support rods is fixed to the corresponding pier cap steel reinforcement, and support positions are provided on the support rods; The positioning frame is adapted to the shape of the pier body steel reinforcement skeleton and is fixed on the support position to form a support structure on the inner side of the corresponding pier body steel reinforcement skeleton. Multiple limiting notches are provided on the outer periphery of the positioning frame, each corresponding to a longitudinal bar of the pier steel reinforcement cage, in order to position the longitudinal bar of the pier steel reinforcement cage.

2. The high-speed railway cast-in-place pier pre-embedded steel bar positioning device according to claim 1, characterized in that, The support station is a support plate welded to the outside of the support rod, and the support plate is horizontally distributed.

3. The high-speed railway cast-in-place pier pre-embedded steel bar positioning device according to claim 2, characterized in that, The support plate is provided with screw holes, and the positioning frame is fixed to the support plate by bolts.

4. The high-speed railway cast-in-place pier pre-embedded steel bar positioning device according to claim 2, characterized in that, The support rod has ribs on its outer side corresponding to the support plate.

5. The high-speed railway cast-in-place pier pre-embedded steel bar positioning device according to claim 2, characterized in that, The support rod comprises multiple segments spliced ​​together. At the splice point of two adjacent support rod segments, the support plate is located at the upper end of the lower support rod segment; the lower end of the upper support rod segment is provided with a clamping plate corresponding to the support plate to clamp the positioning frame.

6. The high-speed railway cast-in-place pier pre-embedded steel bar positioning device according to claim 5, characterized in that, The support rod is a square steel pipe. In two adjacent support rod sections, the lower end of the upper support rod section is provided with a joint, which extends into the lower support rod section.

7. The high-speed railway cast-in-place pier pre-embedded steel bar positioning device according to claim 2, characterized in that, The positioning frame includes multiple splicing units that are spliced ​​together, with two adjacent splicing units spliced ​​together above the support plate.

8. The high-speed railway cast-in-place pier pre-embedded steel bar positioning device according to claim 7, characterized in that, The splicing unit includes straight rods and curved rods, which are spliced ​​together to form a waist-shaped ring corresponding to the steel reinforcement skeleton of the pier body.

9. The high-speed railway cast-in-place pier pre-embedded steel bar positioning device according to claim 1, characterized in that, The support rod is fixed to the reinforcing steel of the foundation by welding.

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