A method for installing stirrups of a bent cap reinforcement cage

Abstract

The application discloses a method for installing stirrup of a bent cap steel reinforcement framework, characterized in that an auxiliary tool for installing the stirrup is manufactured, and the auxiliary tool is provided with a base, a hanger bar mounting seat capable of being horizontally rotated and mounted on the base, and a hanger bar with a hook capable of being vertically rotated and hinged on the hanger bar mounting seat; the method for installing the stirrup is as follows: after the main reinforcement of the framework is constructed, the stirrup is preliminarily installed, and the two ends of the stirrup are respectively located on the two sides of the main reinforcement of the framework; then the auxiliary tool is installed on the top of the main reinforcement of the framework, the hanger bar is lifted, and the hook is hooked on the stirrup hook; then the hanger bar is pressed, the stirrup hook is lifted to be beyond the main reinforcement of the framework, the hanger bar is kept in the pressed state and is horizontally rotated, and the stirrup hook is made to pass over the main reinforcement of the framework; finally, the hanger bar is lifted again, the hook is made to be separated from the stirrup hook, and the next stirrup is prepared to be lifted and installed. The method for installing the stirrup is simple in construction, can effectively save manpower and shorten the installation time of the stirrup, and improves the installation efficiency of the stirrup.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a method for installing stirrups in the steel reinforcement cage of a cap beam. Background Technology

[0002] The reinforcing steel cage of a bridge cap beam consists of main bars and stirrups. During bridge cap beam construction, when the reinforcing steel cage is installed on-site, the stirrups are typically bent into rings at the steel processing plant according to design requirements, with a hook at one end. When installing the stirrups after the main bars of the cap beam cage are installed, some cap beam stirrups have a large diameter, making installation difficult due to the hooks. On-site installation using pry bars is time-consuming and labor-intensive. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an auxiliary tool for installing stirrups in bridge cap beams, so as to facilitate the installation of stirrups in bridge cap beam construction, save time and effort, and improve construction efficiency.

[0004] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows: A method for installing stirrups in a reinforced concrete beam cage, characterized in that an auxiliary tool for installing the stirrups is fabricated, comprising a base, a rod mounting seat, and a rod, wherein the rod mounting seat is mounted on the upper end of the base and is capable of horizontal rotation, the front end of the rod is hinged to the upper end of the rod mounting seat and is capable of vertical rotation, and a hook is welded to the front end of the rod; the stirrup installation method includes the following steps: S1. Preliminary installation of stirrups: After the main reinforcement of the skeleton is constructed, the stirrups are initially installed so that one end of the stirrup is located on one side of the main reinforcement of the skeleton, and the hook of the stirrup is located on the other side of the main reinforcement of the skeleton. S2. Auxiliary tool fixing: Select a suitable position on the top of the main reinforcement of the skeleton and install the auxiliary tool to make the base and the main reinforcement of the skeleton securely fixed; S3. Hook for hooking the stirrup: Raise the rear end of the lifting rod so that the hook at the front end is lowered and hooks the stirrup hook. S4. Lifting the stirrup hook: Press down the rear end of the lifting rod to make the hook rise above the upper surface of the main reinforcement bar of the skeleton; S5. Lateral shift of stirrup hook: Keep the hanger in the downward state and rotate the hanger laterally so that the hook pulls the hook laterally across the main reinforcement of the skeleton; S6. Complete the hoisting of the stirrups and release the lifting rod: Raise the lifting rod and disengage the hook from the bend hook. The bend hook is then connected to the other end of the stirrup, preparing for the hoisting and installation of the next stirrup.

[0005] Furthermore, the manufacture of the auxiliary tool also includes the manufacture of bolt components. A suitable type of hexagonal bolt and a steel fixing strip of a certain length are selected. The two fixing strips are welded in the center to the two parallel sides of the nut head of the hexagonal bolt. A fixing hole for the bolt thread to pass through is opened in the center of the base plate.

[0006] Furthermore, in step S2, when fixing the auxiliary tool, first place the base at a suitable position on the main rib of the skeleton, then pass the bolt with the fixing strip welded on it from the bottom of the main rib of the skeleton through the gap between two adjacent main ribs and then through the fixing hole on the base, while making the fixing strip vertical and pressing against the main rib of the skeleton, and finally tighten the nut on the bolt thread to fix the base to the main rib of the skeleton securely.

[0007] Furthermore, step S6. completing the hoisting of the stirrup, releasing the lifting rod, and preparing for the hoisting and installation of the next stirrup includes loosening the nut and adjusting the position of the base on the main reinforcement of the skeleton.

[0008] Furthermore, the auxiliary tool is also provided with multiple connection holes at the front end of the boom for hinged connection with the boom mounting base.

[0009] Furthermore, step S2. Auxiliary tool fixing also includes selecting a suitable connection hole after the base is fixed, and hinged the rod to the rod mounting seat by means of a pin or bolt.

[0010] Furthermore, in step S2, fixing the auxiliary tool, the selection of a suitable connection hole prioritizes the frontmost or rearmost hole of the boom.

[0011] Furthermore, step S6. completing the hoisting of the stirrup, releasing the lifting rod, and preparing for the hoisting and installation of the next stirrup includes adjusting the hinge position between the lifting rod and the lifting rod mounting seat.

[0012] Furthermore, in step S2. Fixing the auxiliary tool, selecting a suitable position includes taking into account the distance between the two columns, the length of the hanger, the setting of the connecting hole, and the installation position of the stirrup on the steel reinforcement cage.

[0013] Compared with the prior art, the beneficial effects of the present invention are: During installation, the stirrups of this invention are hooked onto the stirrup hook by a hanger rod. The hook is lifted and rotated horizontally by a labor-saving lever structure, allowing it to pass laterally over the main reinforcement of the frame. This releases the connection between the hanger rod and the hook, making it easy to move the stirrups and fit them onto the main reinforcement of the cap beam frame. The installation of the stirrups is time-saving and labor-saving, improving installation efficiency.

[0014] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Attached Figure Description

[0015] Figure 1 This is a flowchart of the stirrup installation method of the present invention; Figure 2 This is a diagram showing the state of the skeleton of the present invention after initial installation; Figure 3 This is a schematic diagram of the connection structure between the auxiliary tool of the present invention and the main reinforcement of the cap beam skeleton; Figure 4 This is a diagram showing the state of the process when the auxiliary tools are used in the construction of this invention; Figure 5 This is a schematic diagram of the structure of the auxiliary tool of the present invention; Figure 6 This is a schematic diagram of the connection structure between the base and the rod mounting seat of the auxiliary tool of the present invention.

[0016] The labels and their corresponding names in the diagram are as follows: 11. Base plate, 12. Top plate Upright pole, 14. Screw assembly, 141. Bolt, Nuts, 143. Fixing strips, 2. Hanger mounting brackets, Rotating disc, 22. Ear plate, 3. Hanging rod, Operating lever, 311. Connection hole, 32. Hook, 4. Stirrups, 41. Hooks, 5. Main reinforcement bars of the skeleton. Detailed Implementation Example

[0017] A method for installing stirrups in a reinforced concrete beam cage is disclosed. This method involves installing stirrups in the reinforced concrete beam cage based on a self-made auxiliary tool for stirrup installation. The auxiliary tool has the following structure: Figure 5 , 6As shown, it has a base 11, a boom mounting seat 2 mounted on the base 11 and capable of horizontal rotation, and a boom 3 with a hook hinged to the boom mounting seat 2 and capable of vertical rotation. The boom 3 has multiple connecting holes 311 that are rotatably hinged to the boom mounting seat 2. The base 11 has a central fixing hole at its bottom, and a screw assembly 14 is provided in the fixing hole. The screw assembly 14 consists of bolts and nuts 142. The bolts consist of hexagonal bolts 141 and fixing strips 143 centrally welded to two parallel sides of the nut head of the hexagonal bolts 141. Figure 1-4 As shown, this stirrup installation method includes the following construction steps: S1. Preliminary installation of stirrups: After the main reinforcement bar 5 of the skeleton is constructed, the stirrups 4 are initially installed, so that one end of the stirrup 4 is located on one side of the main reinforcement bar of the skeleton, and the hook of the stirrup 4 is located on the other side of the main reinforcement bar of the skeleton. This step is relatively simple and can be carried out using existing conventional operations.

[0018] S2. Auxiliary tool fixing: Select a suitable position on the top of the main reinforcement 5 of the skeleton to install the auxiliary tool, so that the base 11 is firmly fixed to the main reinforcement 5 of the skeleton. Specifically: First, select a suitable position on the main reinforcement 5 of the skeleton between the two columns to install the base 11, place the base 11 at the point, and then pass the bolt 141 with the fixing strip 143 welded on it from the bottom of the main reinforcement 5 through the gap between the two adjacent main reinforcements and then through the fixing hole on the base 11. At the same time, make the fixing strip 143 vertical and abut against the main reinforcement 5 of the skeleton. Finally, tighten the nut 142 on the thread of the bolt 141 to fix the base 11 firmly to the main reinforcement 5 of the skeleton. Then select a suitable connection hole 311 to hinge and fix the hanger 3 to the hanger mounting seat 2. When selecting the appropriate installation location for the base 11, it is necessary to consider the distance between the two columns, the length of the hanger 3, the location of the connecting hole 311 on the hanger 3, and the position of the stirrups to be installed on the main reinforcement bars 5 of the skeleton on both sides of the auxiliary tool between the two columns. When selecting the location of the connecting hole 311 on the hanger 3, the frontmost or rearmost hole of the hanger 3 is preferred. In summary, during the installation of all stirrups of the two columns, the appropriate installation location of the base 11 and the selection of the hole position of the hanger 3 should be chosen to minimize or eliminate the movement of the base 11 during subsequent continuous stirrup construction, minimize the replacement of the hinged part of the hanger 3 on the hanger mounting seat 2, that is, minimize the change of the connecting hole 311 position, so as to complete the stirrup lifting and installation in the most labor-saving and time-saving way.

[0019] S3. Hook for hooking the stirrup: After the auxiliary tool is installed and fixed, raise the rear end of the lifting rod 3 so that the front end hook 32 is lowered and hooks the stirrup hook 41 through the lifting rod 3.

[0020] S4. Lifting the stirrup hook part: After hooking the hook 41, press down the rear end of the lifting rod 3 so that the hook 32 drives the hook 41 to rise above the upper surface of the main reinforcement 5 of the skeleton.

[0021] S5. Lateral movement of stirrup hook: After the hook 41 extends beyond the upper surface of the main reinforcement 5 of the skeleton, keep the hanger 3 in a downward state and rotate the hanger 3 laterally so that the hook 32 pulls the hook 41 laterally across the main reinforcement 5 of the skeleton.

[0022] S6. Complete the hoisting of the stirrups and release the lifting rod: After passing the main reinforcement 5 of the skeleton, gradually reduce the force to slowly raise the lifting rod 3 to its natural state (to prevent the lifting rod 3 from suddenly rebounding due to the tension of the stirrups and injuring the operator if released quickly). Continue to raise the lifting rod 3 and disengage the hook 32 from the hook 41. The hook 41 is then lapped with the other end of the stirrup 4, preparing for the hoisting and installation of the next stirrup 4. Preparing for the hoisting and installation of the next stirrup 4 includes readjusting and fixing the position of the base 11 on the main reinforcement 5 of the skeleton or adjusting the hinge position of the lifting rod 3 and the lifting rod mounting seat 2. It also includes, with the hinge position of the lifting rod 3 and the lifting rod mounting seat 2 unchanged, using auxiliary tools to move the previous stirrup 4, which has completed its lapped state, laterally a certain distance on the main reinforcement 5 of the beam or directly to a designated position point, to make room for the hoisting and installation of the next stirrup 4.

[0023] This invention employs auxiliary tools for stirrup installation, simplifying the construction process, effectively saving manpower, shortening the average installation time for a single stirrup, and improving stirrup installation efficiency. Furthermore, after fixing the auxiliary tools to the top of the main reinforcement bars of the cap beam skeleton at suitable locations, the lifting rod mounting base can rotate freely 360° horizontally, allowing for the alternating lifting of the stirrup hooks on both sides of the base on the reinforcement skeleton. By adjusting the position of the operating rod fulcrum (connection hole), hooks at different locations on the reinforcement skeleton can be lifted, thus completing the installation of all or most of the stirrups between two columns without the need for repeated movement and fixing of the auxiliary tools, making operation convenient. Example

[0024] This invention relates to a self-made auxiliary tool for installing stirrups, such as... Figure 5 , 6As shown, the auxiliary tool includes a base 1, a rod mounting base 2, and a rod 3. The base 1 has a base plate 11, a top plate 12, four uprights 13, and a screw assembly 14. The base plate 11 and top plate 12 are made of rectangular steel plates, with the base plate 11 being larger than the top plate 12. The uprights 13 are made of angle steel. The screw assembly 14 consists of bolts and nuts. The base plate 11 and top plate 12 are aligned at their centers. The four uprights 13 are located at the four corners of the lower surface of the top plate 12. The upper ends of the uprights 13 are welded to the lower surface of the top plate 12, and the lower ends are welded to the upper surface of the base plate 11. The screw assembly has bolts 141 with hexagonal heads and two fixing strips 143. The nuts 142 are hexagonal nuts, and the fixing strips 143 are threaded steel. The middle portions of the two fixing strips 143 are welded to a pair of parallel sides of the bolt head. The base plate 11 has a fixing hole in its center, through which the bolts 141 pass. The specific lengths of the base plate 11 and the fixing strip 143 are such that the auxiliary tool is placed on the main reinforcement of the steel reinforcement cage. The base plate 11 is close to the upper surface of the upper main reinforcement of the steel reinforcement cage, and the fixing strip 143 is perpendicular to the main reinforcement of the steel reinforcement cage and close to the lower surface of the upper main reinforcement of the steel reinforcement cage. After the bolts on the bolts 141 above the base plate 11 are tightened, the auxiliary tool can be firmly fixed on the steel reinforcement cage. Preferably, the lengths of the base plate 11 and the fixing strip 143 are both at least greater than the maximum width of the four main reinforcements located in the middle of the steel reinforcement cage. The hanger mounting base 2 is provided with a rotating disk 21 and ear plates 22. The ear plates 22 are formed by processing steel plates. The rotating disk 21 can be a structure with a circular groove between two steel plates and a built-in ball bearing, or other existing structures can be used. The rotating disk 21 is horizontally rotated and installed at the top center of the base 1. The ear plates 22 are installed on the upper surface of the rotating disk 21. The ear plates 22 have two ear plates of the same size and parallel to each other, and the upper ends of the two ear plates 22 have through holes of equal height. The boom 3 is equipped with an operating rod 31 and a hook 32. The operating rod 31 is made of seamless steel pipe, and the hook 32 is formed by bending steel bars. The hook 32 is vertically welded to the front end of the operating rod 31. The operating rod 31 has multiple connecting holes 311 at intervals of 1 / 5 to 1 / 3 of its total length from the hook 32, with the axis perpendicular to the hook 32. The operating rod 31 is clamped between two ear plates 22 and is connected to the two ear plates 22 by pins or bolts passing through the connecting holes 311 and the through holes, which rotate vertically.

[0025] The auxiliary tool of this invention has a simple structure and is easy to source materials, which are mostly conventional steel. It can utilize some leftover materials or scraps from construction, making it convenient and economical to manufacture.

[0026] This invention is not limited to the specific embodiments described above. For those skilled in the art, all modifications made based on the above concept without creative effort fall within the protection scope of this invention.

Claims

1. A method for installing stirrups in a steel reinforcement cage for a cap beam, characterized in that, An auxiliary tool for installing stirrups is fabricated, comprising a base, a rod mounting seat, and a rod. The rod mounting seat is mounted on the upper end of the base and can rotate horizontally. The front end of the rod is hinged to the upper end of the rod mounting seat and can rotate vertically. A hook is welded to the front end of the rod. The base comprises a bottom plate, a top plate, and four uprights. The bottom plate and the top plate are aligned at their centers. The four uprights are respectively arranged at the four corners of the lower surface of the top plate. The upper ends of the uprights are welded to the lower surface of the top plate, and the lower ends of the uprights are welded to the upper surface of the bottom plate. The rod mounting seat comprises a rotating disk and ear plates. The rotating disk is horizontally mounted at the top center of the base. The ear plates are mounted on the upper surface of the rotating disk and have two ear plates of the same size and parallel to each other. The upper ends of the two ear plates have through holes of equal height. The stirrup installation method includes the following steps: S1. Preliminary installation of stirrups: After the main reinforcement of the skeleton is constructed, the stirrups are initially installed so that one end of the stirrup is located on one side of the main reinforcement of the skeleton, and the hook of the stirrup is located on the other side of the main reinforcement of the skeleton. S2. Auxiliary tool fixing: Select a suitable position on the top of the main reinforcement of the skeleton and install the auxiliary tool to make the base and the main reinforcement of the skeleton securely fixed; S3. Hook for hooking the stirrup: Raise the rear end of the lifting rod so that the hook at the front end is lowered and hooks the stirrup hook. S4. Lifting the stirrup hook: Press down the rear end of the lifting rod to make the hook rise above the upper surface of the main reinforcement bar of the skeleton; S5. Lateral shift of stirrup hook: Keep the hanger in the downward state and rotate the hanger laterally so that the hook pulls the hook laterally across the main reinforcement of the skeleton; S6. Complete the hoisting of the stirrups and release the lifting rod: Raise the lifting rod and disengage the hook from the bend hook. The bend hook is then connected to the other end of the stirrup, preparing for the hoisting and installation of the next stirrup.

2. The method for installing stirrups in a cap beam reinforcement cage according to claim 1, characterized in that, The auxiliary tool also includes the manufacture of bolt parts. A suitable type of hexagonal bolt and a steel fixing strip of a certain length are selected. The two fixing strips are welded in the center to the two parallel sides of the nut head of the hexagonal bolt. The base plate has a fixing hole in the center for the bolt thread to pass through.

3. The method for installing stirrups in a cap beam reinforcement cage according to claim 2, characterized in that, When fixing the auxiliary tool in step S2, first place the base at a suitable position on the main reinforcement of the skeleton, then pass the bolt with the fixing strip welded on it from the bottom of the main reinforcement of the skeleton through the gap between two adjacent main reinforcements and then through the fixing hole on the base. At the same time, make the fixing strip vertical and press against the main reinforcement of the skeleton. Finally, tighten the nut on the bolt thread to fix the base and the main reinforcement of the skeleton securely.

4. The method for installing stirrups in a cap beam reinforcement cage according to claim 1, characterized in that, Step S6. Complete the hoisting of the stirrup, release the lifting rod, and prepare for the hoisting and installation of the next stirrup, including loosening the nut and adjusting the position of the base on the main reinforcement of the skeleton.

5. The method for installing stirrups in a cap beam reinforcement cage according to claim 1, characterized in that, The auxiliary tool also includes having multiple connection holes at the front end of the boom for hinged connection with the boom mounting base.

6. The method for installing stirrups in a cap beam reinforcement cage according to claim 5, characterized in that, Step S2. Auxiliary tool fixing also includes selecting a suitable connection hole after the base is fixed, and hinge the rod to the rod mounting base by means of a pin or bolt.

7. The method for installing stirrups in a cap beam reinforcement cage according to claim 6, characterized in that, In step S2, when fixing the auxiliary tool, the appropriate connection hole is selected, with priority given to the frontmost or rearmost hole of the boom.

8. The method for installing stirrups in a cap beam reinforcement cage according to claim 6, characterized in that, Step S6. Complete the hoisting of the stirrup, release the lifting rod, and prepare for the hoisting and installation of the next stirrup, including adjusting the hinge position between the lifting rod and the lifting rod mounting seat.

9. The method for installing stirrups in a cap beam reinforcement cage according to claim 5, characterized in that, In step S2, fixing the auxiliary tool, selecting a suitable position includes taking into account the distance between the two columns, the length of the hanger, the setting of the connection hole, and the installation position of the stirrup on the steel reinforcement cage.

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