Bridge bent cap core rod dismantling mechanism and method

Abstract

The application discloses a bridge bent cap through rod dismantling mechanism, which comprises a through rod horizontally penetrating a pier, a reserved hole channel horizontally penetrating the pier is arranged at the top of the through rod, a movable pulley device is arranged at one end of the through rod, a traction rope penetrating the movable pulley device and being fixed is arranged in the reserved hole channel, and the other end of the traction rope is located outside the reserved hole channel. The application further discloses a bridge bent cap through rod dismantling method. The application utilizes the force-saving principle of the movable pulley, and the dismantling work is more labor-saving, so that the application can be widely applied in the technical field of bridge construction.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a mechanism and method for removing the core rod of a bridge cap beam. Background Technology

[0002] For the construction of bridge cap beams or column-beam systems, two common construction methods are the core-insertion method and the clamping method. The clamping method relies on friction to resist construction loads, which is uncontrollable during construction and carries a high safety risk. The core-insertion method is suitable not only for cylindrical piers but also for square and rectangular piers. In this method, sleeves are pre-embedded in the pier column to install steel bars, which then support the construction load of the cap beam. Depending on the size of the cap beam, the diameter of the steel bars is typically 10–15 cm, the length is 3–4 m, and a single steel bar can weigh 200–300 kg. When dismantling the steel bars, suspended platforms or other work platforms are generally used on-site, which also carries a high safety risk. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a mechanism and method for removing the core rod of a bridge cap beam, which utilizes the labor-saving principle of a movable pulley to make the removal work more labor-saving.

[0004] The present invention provides a bridge cap beam through-bar removal mechanism, comprising a through-bar that passes horizontally through the bridge pier, the top of the through-bar having a reserved channel that passes horizontally through the bridge pier, one end of the through-bar having a movable pulley device, a traction rope having one end passing through the movable pulley device and fixed inside the reserved channel, and the other end of the traction rope being located outside the reserved channel.

[0005] In the above technical solution, the movable pulley device includes a connector fixed to one end of the through rod, a movable pulley is provided at the end of the connector away from the through rod, a horizontal guide member is provided above the movable pulley, a fixed member is provided below the movable pulley, one end of the traction rope is fixedly connected to the fixed member, and the other end of the traction rope passes through the movable pulley, the horizontal guide member and the reserved channel in sequence and extends out of the reserved channel.

[0006] The above technical solution also includes a steel pipe with a diameter larger than that of the through rod and one end aligned with the connector and the movable pulley. The steel pipe is positioned by a load-bearing component, and the horizontal guide component and the fixing component are both located at the other end of the steel pipe. The traction rope passing through the movable pulley and the horizontal guide component passes through the inner cavity of the steel pipe and enters the reserved channel.

[0007] In the above technical solution, the fixing component is a second screw installed at the lower part of the side wall of the end of the steel pipe, and the horizontal guide component includes two other second screws located on the steel pipe at the same end as the second screw. The two second screws are located at the middle and upper parts of the side wall of the end of the steel pipe, respectively, and the height of the movable pulley is between the heights of the second screws and the second screw.

[0008] In the above technical solution, the other end of the steel pipe relative to the second screw is provided with a self-locking component that self-locks the mandrel entering the steel pipe.

[0009] In the above technical solution, the self-locking component has a third screw that is hinged to one end of the steel pipe through the first round holes on both sides. The bottom of the third screw is provided with a rotating component. The steel pipe is provided with a slot below the self-locking component. One side of the slot is aligned with the vertical rotating component. The length of the rotating component is greater than the diameter of the steel pipe but less than the distance from the third screw to the other side of the slot.

[0010] In the above technical solution, the connecting member includes an I-shaped steel member and two first screws. One end of the I-shaped steel member is fixedly connected to a first screw through a small hole at the end of a through rod, and the other end of the I-shaped steel member is connected to a movable pulley through another first screw.

[0011] In the above technical solution, the steel pipe is provided with pads on both sides of the end facing the bridge pier to increase stability.

[0012] In the above technical solution, the load-bearing components are two lifting rings located at the top ends of the steel pipe and a lifting rope passing through the lifting rings.

[0013] This invention also provides a method for removing the core rod of a bridge cap beam, comprising the following steps: S1, before installing the core rod, install the connector on the core rod and thread the traction rope into the pre-drilled hole of the core rod in the pier column; S2, install the self-locking component into the steel pipe, and use a crane to lift the steel pipe to the top of the cap beam to be removed; S3, use a bamboo pole to guide both ends of the traction rope to the top of the cap beam, pass one end of the traction rope around the movable pulley and thread it into the steel pipe, tie it to the second screw, and then lift the traction rope between the movable pulley and the pier column and thread it into the steel pipe. S4. The crane lowers the steel pipe and aligns it with the opening of the mandrel. Pull the other end of the traction rope and tighten it. The pad is then pressed against the pier to stabilize the force. S5. Continue pulling the traction rope. The mandrel moves until it comes into contact with the self-locking component. The rotating component rotates to the other end of the steel pipe. The bottom end of the rotating component contacts the mandrel. The mandrel continues to move until its tail leaves the rotating component. The rotating component falls back to its original position, forming a self-locking mechanism. S6. The crane lowers the steel pipe to the ground, completing the removal of the mandrel.

[0014] The bridge cap beam through-hole rod removal mechanism and method of the present invention have the following beneficial effects: This invention utilizes the labor-saving principle of movable pulleys to make demolition work more labor-saving. Furthermore, installing self-locking components on the steel pipe effectively prevents the core rod from slipping, making the demolition operation safer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the bridge cap beam through-bar removal mechanism of the present invention before removal; Figure 2 This is a schematic diagram of the structure of the through-bar and connecting parts in the bridge cap beam through-bar removal mechanism of the present invention; Figure 3 This is a schematic diagram of the steel pipe structure in the bridge cap beam through-bar removal mechanism of the present invention; Figure 4 This is an exploded view of the steel pipe and self-locking component in the bridge cap beam through-hole rod removal mechanism of the present invention; Figure 5 This is a structural fit diagram of the steel pipe and self-locking component in the bridge cap beam through-bar removal mechanism of the present invention; Figure 6 This is a scene diagram of the bridge cap beam through-bar removal mechanism of the present invention when it begins to be removed; Figure 7 This is a scene diagram of the through-bar and steel pipe of the bridge cap beam through-bar removal mechanism of the present invention. Figure 8 This is a scene diagram of the bridge cap beam through-bar removal mechanism of the present invention when the through-bar is completely removed; Figure 9 This is an enlarged view of the structure of the bridge cap beam through-bar removal mechanism of the present invention when it abuts against the bridge pier; Figure 10 This is an enlarged view of the structure of the bridge cap beam through-hole rod removal mechanism of the present invention before self-locking; Figure 11 This is an enlarged view of the structure of the bridge cap beam core rod removal mechanism of the present invention after achieving self-locking; Figure 12 This is a flowchart illustrating the method for removing the core rod of a bridge cap beam according to the present invention. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.

[0017] Example 1 See Figures 1 to 11 The bridge cap beam through-bar removal mechanism of this embodiment includes a through-bar 20 that passes horizontally through the bridge pier. The top of the through-bar 20 is provided with a reserved channel that passes horizontally through the bridge pier. One end of the through-bar 20 is provided with a movable pulley device. A traction rope 40 is provided in the reserved channel, with one end passing through the movable pulley device and fixed. The other end of the traction rope 40 is located outside the reserved channel.

[0018] Example 2 This embodiment is basically the same as Embodiment 1, except that: The movable pulley device includes a connector 30 fixed to one end of the through rod 20. The end of the connector 30 facing away from the through rod 20 is provided with a movable pulley 303. A horizontal guide member is provided above the movable pulley 303, and a fixing member is provided below the movable pulley 303. One end of the traction rope 40 is fixedly connected to the fixing member, and the other end of the traction rope 40 passes through the movable pulley 303, the horizontal guide member and the reserved channel in sequence and extends out of the reserved channel.

[0019] The bridge cap beam through-bar removal mechanism of this embodiment also includes a steel pipe 50 with a diameter larger than the through-bar 20 and one end aligned with the connector 30 and the movable pulley 303. The steel pipe 50 is positioned by a load-bearing member, and the horizontal guide member and the fixing member are both located at the other end of the steel pipe 50. The traction rope 40, which passes through the movable pulley 303 and the horizontal guide member, passes through the inner cavity of the steel pipe 50 and enters the reserved channel.

[0020] The fixing component is a second screw 505 installed on the lower part of the end side wall of the steel pipe 50. The horizontal guide component includes two other second screws 506 and 507 located on the steel pipe 50 at the same end as the second screw 505. The two second screws 506 and 507 are located in the middle and upper parts of the end side wall of the steel pipe 50, respectively. The height of the movable pulley 303 is between the heights of the second screws 506 and 505.

[0021] The steel pipe 50 is provided with a self-locking component 60 at the other end relative to the second screws 505, 506, 507, which self-locks the through rod 20 that enters the steel pipe 50.

[0022] The self-locking component 60 has a third screw 601 that is hinged to one end of the steel pipe 50 through the first round holes 501 on both sides of the top. The bottom of the third screw 601 is provided with a rotating component 602. The steel pipe 50 is provided with a slot 504 below the self-locking component 60. One side of the slot 504 is aligned with the vertical rotating component 602. The length of the rotating component 602 is greater than the diameter of the steel pipe 50 but less than the distance from the third screw 601 to the other side of the slot 504.

[0023] The connector 30 includes an I-shaped steel member 301 and two first screws 302. One end of the I-shaped steel member 301 is fixedly connected to a first screw 302 through a small hole 201 at the end of the through rod 20. The other end of the I-shaped steel member 301 is connected to a movable pulley 303 through another first screw 302.

[0024] The steel pipe 50 is provided with pads 508 on both sides of the end facing the pier to increase stability.

[0025] The load-bearing components are two lifting rings 503 located at the top ends of the steel pipe 50, and a lifting rope passing through the lifting rings 503.

[0026] Example 3 This embodiment is illustrated with specific examples: (1) One end of the through rod 20 is provided with a small hole and connected to the connector 30 as the traction end; (2) The connector 30 is composed of an I-shaped steel piece 301, two first screws 302 and a movable pulley 303. The two first screws 302 are symmetrically arranged on both sides of the waist plate of the I-shaped steel piece 301. One first screw 302 can pass through the small hole 201 at the end of the through rod 20 to connect the connector 30 and the through rod 20 together. The movable pulley 303 is installed on the other first screw 302; (3) The traction rope 40 is a nylon rope with a diameter of 10mm, which is connected to the through rod 20. 0 are installed together for the removal of the through rod 20. One end of the traction rope 40 passes around the second screw 507, 506 and the movable pulley 303 and is fixed on the second screw 505. Pulling the other end of the traction rope 40 can drag the through rod 20; (4) The diameter of the steel pipe 50 is more than 10cm larger than the diameter of the through rod 20 to transport the removed through rod 20. Two lifting rings 503 are welded to the top for hoisting; (5) A set of first round holes 501 is provided at one end of the steel pipe 50 for installing the self-locking part 60; (6) A slot 504 is provided below the first round hole 501. When the rotating part 602 hangs freely, because The rotating part 602 is close to the edge of the slot 504 and can only rotate counterclockwise. The width of the slot 504 can meet the requirements of the rotating part 602; (7) Two pads 508 are symmetrically welded above the slot 504. The steel pipe 50 contacts the cylindrical pier line through the pads 508 to increase stability; (8) Three sets of second round holes 502 are set at the other end of the steel pipe 50, through which the second screws 505, 506 and 507 pass respectively. One of the second screws 505 is used to fix the traction rope 40, and the other two second screws 506 and 507 are used to change the direction of the traction rope 40 and ensure that the traction rope 40 is subjected to horizontal force; (9) Self-locking part 6 0 is composed of a third screw 601 and a rotating part 602. The rotating part 602 is fitted on the third screw 602 and can rotate. The third screw 601 passes through the first round hole 501 and installs the rotating part 602 inside the steel pipe 50. The rotating part 602 hangs freely and is close to the edge of the groove 504. (10) When the through rod 20 is dragged to contact the rotating part 602, the rotating part 602 rotates counterclockwise and leaves the groove 504. After the through rod 20 has completely entered the steel pipe 50 and left the rotating part 602, the rotating part 602 falls back to the groove 504 under the action of gravity, forming a self-locking mechanism to prevent the through rod 20 from slipping out of the steel pipe 50.

[0027] Example 4 See Figure 12 The workflow of the bridge cap beam through-bar removal method in this embodiment is as follows: S1. Before installing the through rod 20, install the connector 30 on the through rod 20 in advance. At the same time, when installing the through rod 20, thread the traction rope 40 into the reserved hole above the through rod 20 of the pier column. S2. First, install the self-locking part 60 onto the steel pipe 50, and use a crane to lift the steel pipe 50 to the top of the cap beam 10 of the through rod 20 to be removed. S3. The workers use bamboo poles (not shown in the figure) to guide both ends of the traction rope 40 to the top of the cap beam 10. One end of the traction rope 40 is passed around the movable pulley 303, inserted into the steel pipe 50, and tied to the second screw 505. Then, the traction rope 40 between the movable pulley 303 and the pier is lifted, inserted into the steel pipe 50, and passed around the horizontal guide member formed by the second screws 506 and 507. S4. After the crane lowers the steel pipe 50 to the opening of the through rod 20, pull the other end of the traction rope 40. After the traction rope 40 is tightened, the pad 508 is pressed against the pier to form a stable force state. S5. Continue pulling the traction rope 40, and the through rod 20 begins to move. When the through rod 20 contacts the self-locking part 60, the rotating part 602 rotates counterclockwise. One end of the rotating part 602 rests on the through rod 20, and the through rod 20 continues to move forward. When the tail of the through rod 20 leaves the rotating part 602, the rotating part 602 falls back to its original position, forming a self-locking mechanism. S6. The crane lowers the steel pipe 50 to the ground, completing the removal of the core rod 20.

[0028] Technical principles and innovations of this invention: (1) The traction rope 40 is installed together with the core rod 20. During the dismantling operation, the workers use bamboo poles on the cap beam 10 to guide the traction rope 40 to the top of the cap beam 10. The workers can complete all the work on the top of the cap beam 10 without using a suspended basket or rebuilding the work platform.

[0029] (2) The self-locking part 60 can rotate inside the steel pipe 50. When the mandrel 20 begins to contact the self-locking part 60, the self-locking part 60 rotates and opens. When the mandrel 20 leaves the self-locking part 60, the self-locking part 60 automatically falls back to form a self-lock, preventing the mandrel 20 from slipping out of the steel pipe 50 and ensuring hoisting safety.

[0030] (3) The movable pulley 303 installed on the connector 30 moves together with the through rod 20 and is used as the movable pulley 303. The movable pulley 303 utilizes the labor-saving principle, so that the operator can easily pull the through rod 20 weighing 200-300kg. Multiple movable pulleys 303 can be added according to the weight of the through rod 20 to form a movable pulley group, so as to achieve the purpose of saving more effort.

[0031] (4) Two pads 508 are symmetrically welded to the end of the steel pipe 50 so that they can make linear contact with the cylindrical pier, which can stabilize the force and prevent the steel pipe 50 from shaking.

[0032] This invention provides a technique for dismantling the core rod of a cap beam. A connector 30 is installed at the end of the core rod 20. Workers, positioned at the top of the cap beam 10, use a traction rope 40 and a movable pulley 303 on the connector 30 to drag the core rod 20 into the steel pipe 50. Simultaneously, a self-locking device is installed at one end of the steel pipe 50. After the core rod 20 is fully inside the steel pipe 50, the self-locking device drops, locking the core rod 20 inside the steel pipe 50 and preventing it from slipping out. Finally, a crane lowers the steel pipe 50 along with the core rod 20 to the ground. This invention utilizes the labor-saving principle of the movable pulley 303, making the dismantling work more labor-saving. Furthermore, installing a self-locking component 60 on the steel pipe 50 effectively prevents the core rod 20 from slipping, making the dismantling operation more complete.

[0033] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0034] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A bridge cap beam through-bar removal mechanism, comprising a through-bar (20) horizontally passing through the bridge pier, characterized in that: The top of the through rod (20) is provided with a reserved channel that passes horizontally through the pier. One end of the through rod (20) is provided with a movable pulley device. A traction rope (40) with one end passing through the movable pulley device and fixed is provided in the reserved channel. The other end of the traction rope (40) is located outside the reserved channel.

2. The bridge cap beam through-bar removal mechanism according to claim 1, characterized in that: The movable pulley device includes a connector (30) fixed to one end of the through rod (20). The connector (30) is provided with a movable pulley (303) at the end away from the through rod (20). A horizontal guide member is provided above the movable pulley (303), and a fixing member is provided below the movable pulley (303). One end of the traction rope (40) is fixedly connected to the fixing member, and the other end of the traction rope (40) passes through the movable pulley (303), the horizontal guide member and the reserved channel in sequence and extends out of the reserved channel.

3. The bridge cap beam through-bar removal mechanism according to claim 2, characterized in that: It also includes a steel pipe (50) with a diameter larger than the through rod (20) and one end aligned with the connector (30) and the movable pulley (303). The steel pipe (50) is positioned by the load-bearing member. The horizontal guide member and the fixed member are both located at the other end of the steel pipe (50). The traction rope (40) passing through the movable pulley (303) and the horizontal guide member passes through the inner cavity of the steel pipe (50) and enters the reserved channel.

4. The bridge cap beam through-bar removal mechanism according to claim 3, characterized in that: The fixing component is a second screw (505) installed on the lower part of the end side wall of the steel pipe (50). The horizontal guide component includes two other second screws (506, 507) located on the steel pipe (50) at the same end as the second screw (505). The two second screws (506, 507) are located in the middle and upper part of the end side wall of the steel pipe (50), respectively. The height of the movable pulley (303) is between the heights of the second screws (506) and (505).

5. The bridge cap beam through-bar removal mechanism according to claim 4, characterized in that: The steel pipe (50) is provided with a self-locking element (60) at the other end relative to the second screw (505, 506, 507) to self-lock the mandrel (20) that enters the steel pipe (50).

6. The bridge cap beam through-bar removal mechanism according to claim 5, characterized in that: The self-locking component (60) has a third screw (601) that is hinged to one end of the steel pipe (50) through the first round holes (501) on both sides of the top. The bottom of the third screw (601) is provided with a rotating component (602). The steel pipe (50) is provided with a slot (504) below the self-locking component (60). One side of the slot (504) is aligned with the vertical rotating component (602). The length of the rotating component (602) is greater than the diameter of the steel pipe (50) but less than the distance from the third screw (601) to the other side of the slot (504).

7. The bridge cap beam through-bar removal mechanism according to claim 6, characterized in that: The connector (30) includes an I-shaped steel piece (301) and two first screws (302). One end of the I-shaped steel piece (301) is fixedly connected to a first screw (302) through a small hole (201) at the end of a mandrel (20). The other end of the I-shaped steel piece (301) is connected to a movable pulley (303) through another first screw (302).

8. The bridge cap beam through-bar removal mechanism according to claim 7, characterized in that: The steel pipe (50) is provided with pads (508) on both sides of the end facing the pier to increase stability.

9. The bridge cap beam through-bar removal mechanism according to claim 8, characterized in that: The load-bearing components are two lifting rings (503) located at the top ends of the steel pipe (50) and a lifting rope passing through the lifting rings (503).

10. A method for removing the through-bar of a bridge cap beam, characterized in that: Includes the following steps: S1. Before installing the through rod (20), install the connector (30) on the through rod (20) and thread the traction rope (40) into the reserved hole of the through rod (20) of the pier column; S2. Install the self-locking part (60) into the steel pipe (50) and use a crane to lift the steel pipe (40) to the top of the cap beam (10) of the mandrel (20) to be removed; S3. Use a bamboo pole to guide both ends of the traction rope (40) to the top of the cap beam (10). Pass one end of the traction rope (40) around the movable pulley (303) and into the steel pipe (50), tie it to the second screw (505), and then lift the traction rope (40) between the movable pulley (303) and the pier column, pass it into the steel pipe (50) and around the second screw (506, 507). S4. The crane lowers the steel pipe (50) and aligns it with the opening of the through rod (20). Pull the other end of the traction rope (40). After tightening the traction rope (40), the pad (508) presses against the pier to stabilize the force. S5. Continue pulling the traction rope (40), the through rod (20) moves until it abuts against the self-locking part (60), the rotating part (602) rotates to the other end of the steel pipe (50), the bottom end of the rotating part (602) contacts the through rod (20), the through rod (20) continues to move until the tail of the through rod (20) leaves the rotating part (602), the rotating part (602) falls back to its original position, forming a self-locking mechanism; S6. The crane lowers the steel pipe (50) to the ground to complete the removal of the core rod (20).

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