Unbalanced counterweight structure and construction method of rotating portal pier

Abstract

The present invention relates to the technical field of portal pier construction, and in particular to an unbalanced counterweight structure and construction method for a rotating portal pier, comprising a counterweight support frame arranged on a steel beam, the counterweight support frame comprising a base frame, a side frame and a top frame connected in sequence, the base frame being provided with a support rod, the support rods being arranged in a plurality along the length direction of the counterweight support frame, the side frames being provided with two, and both being connected to the top frame and the base frame at the same time, the top frame being provided with a reinforcing rod, the support rod being provided with a counterweight, and a placement area being provided between the reinforcing rod and the side wall of the top frame so as to place the counterweight on the support rod. By connecting the counterweight support frame to the steel beam, it is convenient to realize integration with the steel beam and thus be able to rotate along with the steel beam, by providing the support rod, it is convenient to place the counterweight, and by combining the counterweight support frame with the counterweight, the counterweight can be adjusted by adding or reducing the counterweight, thereby achieving more accurate counterweight balance.

Description

Technical Field

[0001] The present invention relates to the technical field of portal pier construction, and in particular to an unbalanced counterweight structure of a rotary portal pier and a construction method thereof. Background Art

[0002] When a new railway needs to cross diagonally above an operating line, portal piers are generally built above the operating line to support the railway.

[0003] Because long-term construction is not allowed above the operating line, a rotating portal pier is used. Figure 1 The rotating portal pier consists of two concrete piers 4, each connected to a steel-concrete section, which in turn is connected to a common steel beam 6. The steel-concrete section consists of outer steel columns 5 and an inner concrete section. To facilitate construction, concrete piers 4 are generally constructed on both sides of the operating line. Then, the steel-concrete section is constructed and the steel beam 6 is installed at the end to be rotated. The steel columns 5 are then mounted on the fixed-side concrete piers 4, and the entire pier is rotated so that the steel beam 6 is positioned above the fixed-side steel-concrete piers 4.

[0004] However, since the steel beam is biased to one side relative to a concrete pier, a counterweight needs to be set on the steel beam and the concrete pier to ensure balance and guarantee safety during rotation. Therefore, a counterweight support frame structure is urgently needed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: in order to solve the technical problems in the prior art, the present invention provides a rotating portal pier unbalanced counterweight structure and a construction method.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a rotating portal pier unbalanced counterweight structure, including a counterweight support frame arranged on a steel beam, the counterweight support frame including a base frame, a side frame and a top frame connected in sequence, the base frame is provided with a support rod, and the support rods are arrayed in a plurality along the length direction of the counterweight support frame, the side frames are provided with two, and both are connected to the top frame and the base frame at the same time, a reinforcing rod is provided in the top frame, a counterweight is placed on the support rod, and an insertion area is provided between the reinforcing rod and the side wall of the top frame so that the counterweight can be placed on the support rod.

[0007] The unbalanced counterweight structure of the rotating portal pier of the present invention is connected to the steel beam through a counterweight support frame, which makes it easy to integrate with the steel beam and then rotate with the steel beam. By setting a support rod, it is convenient to place the counterweight piece, and the placement area makes it convenient to place the counterweight piece on the support rod. Through the combination of the counterweight support frame and the counterweight piece, the counterweight can be adjusted by adding or reducing the counterweight piece, thereby achieving counterweight balance more accurately.

[0008] Furthermore, the counterweight is a steel rod, a water bag or a concrete block.

[0009] Furthermore, a supporting bottom plate is fixedly connected to the steel beam, and the counterweight support frame is provided with a connecting plate toward one end of the steel beam, the bottom surface of the connecting plate abuts the top surface of the supporting top plate, and the connecting plate is fixedly connected to the side wall of the steel beam through a first locking bolt, and a cover plate is hinged on the connecting plate, and the cover plate abuts the top surface of the steel beam and is fixedly connected to the top surface of the steel beam through a second locking bolt.

[0010] Furthermore, an oblique support rod is hinged on the bottom surface of the counterweight support frame, and one end of the oblique support rod away from the counterweight support frame is hinged to the concrete pier.

[0011] Furthermore, a temporary bracket is connected to the bottom of the counterweight support frame, and the temporary bracket is set on the ground. Two fixing plates are connected to the bottom surface of the counterweight support frame, and the two fixing plates are relatively arranged on both sides of the temporary bracket. The same fixing pin is connected between the two fixing plates.

[0012] A construction method, based on the above-mentioned rotating portal pier unbalanced counterweight structure, includes the following steps:

[0013] S1. Install temporary supports on the ground and weld the supporting base plate on the steel beam;

[0014] S2. Hoist the counterweight support frame and place it on the temporary bracket and support base;

[0015] S3. Connect the counterweight support frame to the temporary support and the steel beam;

[0016] S4. Lift the counterweight and place it on the support rod.

[0017] Furthermore, in step S7, when placing the counterweights, the counterweights are placed layer by layer, and each layer of counterweights is placed around the placement area. The counterweights around the placement area are placed first, and then the counterweights located in the placement area are placed. The position of the counterweights is adjusted by the adjustment device during hoisting.

[0018] Furthermore, the adjustment device includes a locking assembly connected to the counterweight support frame; a moving assembly provided on the locking assembly; a locking hook connected to the movable end of the moving assembly, and the locking hook is suitable for hooking the lifting rope to assist the movement of the lifting rope.

[0019] Furthermore, the moving assembly includes a bottom frame connected to the locking assembly; a slider sliding in the bottom frame along the width direction of the counterweight support frame; a locking rod sliding in the slider along the length direction of the counterweight support frame, and the locking rod is connected to the locking hook.

[0020] Furthermore, the lock rod is connected to a sliding cylinder, and the lock hook is connected to a sliding block. The sliding block slides in the sliding cylinder along the width direction of the counterweight support frame. A compression spring is provided in the sliding cylinder, one end of the compression spring abuts the sliding block, and the other end abuts the inner wall of the sliding cylinder. A steel wire rope is provided in the lock rod, and the steel wire rope is connected to the sliding block so as to pull the sliding block to overcome the elastic force of the compression spring and slide. The end of the steel wire rope away from the sliding block extends to the end of the lock rod away from the sliding cylinder. A T-shaped slide groove is provided in the bottom frame along the width direction of the counterweight support frame, and the slider slides in the T-shaped slide groove. A slide groove is provided in the slide groove along the length direction of the counterweight support frame, and the lock rod slides in the slide groove. A plurality of latch teeth are arranged in an array along the length direction of the counterweight support frame on the lock rod, and a latch groove is formed between adjacent latch teeth. A latch rod slides in the slider, and the latch rod can be inserted into the latch groove to prevent the latch groove from moving. A plurality of rollers are rotatably connected to the lock hook.

[0021] The beneficial effects of the present invention are:

[0022] 1. The counterweight support frame is connected to the steel beam, making it easy to integrate with the steel beam and rotate with the steel beam. The support rod is set to facilitate the placement of the counterweight. The placement area is convenient for placing the counterweight on the support rod. The combination of the counterweight support frame and the counterweight can adjust the counterweight by adding or removing the counterweight, thereby achieving more accurate counterweight balance.

[0023] 2. The counterweight support frame is supported by the supporting bottom plate, and the counterweight support frame is fixedly connected to the steel beam through the cover plate to achieve the connection between the counterweight support frame and the steel beam. The connection method is relatively simple and quick, and the strength is high;

[0024] 3. The setting of the diagonal brace makes it easier to support the counterweight support frame and improve its bearing capacity. At the same time, it can form a triangular stable structure with the concrete pier and the counterweight support frame, further improving the stability of the counterweight support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and examples.

[0026] Figure 1 It is a structural diagram of steel beams, steel columns and concrete piers in the background technology.

[0027] Figure 2 It is a schematic structural diagram embodying the whole of the present invention.

[0028] Figure 3 It is a structural diagram of the cover plate in the invention.

[0029] Figure 4 It is a structural diagram of the locking assembly in the invention.

[0030] Figure 5 It is a structural diagram of the mobile component and the locking hook in the invention.

[0031] Figure 6 It is a structural diagram of the compression spring in the invention.

[0032] In the figure: 1. Counterweight support frame; 11. Cover plate; 111. Second locking bolt; 112. Connecting plate; 12. First locking bolt; 13. Diagonal brace; 14. Fixing plate; 141. Fixing pin; 15. Base frame; 151. Support rod; 16. Side frame; 17. Top frame; 171. Reinforcement rod; 172. Insertion area; 2. Support base plate; 3. Temporary support; 4. Concrete pier; 5. Steel column; 6. Steel beam; 7. Adjustment device 71. Locking assembly; 711. Fixed rod; 712. Bottom plate; 713. Sliding plate; 72. Moving assembly; 721. Bottom frame; 722. Slider; 7221. Slide groove; 7222. Clamping rod; 723. Locking rod; 7231. Clamping tooth; 7232. Slot; 724. T-shaped slide groove; 725. Sliding cylinder; 726. Sliding block; 727. Compression spring; 728. Wire rope; 729. Adjusting bolt; 73. Lock hook. DETAILED DESCRIPTION

[0033] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0034] In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be broadly understood, for example, to mean fixed, removable, or integral; mechanically or electrically connected; directly or indirectly through an intermediary; or internally connected between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Reference Figure 2 and Figure 3 A rotating portal pier unbalanced counterweight structure includes a counterweight support frame 1 mounted on a steel beam 6. The counterweight support frame 1 comprises a base frame 15, side frames 16, and a top frame 17, which are welded in sequence. Support rods 151 are welded to the base frame 15. Multiple support rods 151 are arranged along the length of the counterweight support frame 1. Two side frames 16 are provided, both welded to the top frame 17 and the base frame 15. Counterweights are placed on the support rods 151. Reinforcement rods 171 are installed within the top frame 17. An insertion area 172 is provided between the reinforcement rods 171 and the sidewalls of the top frame 17 to facilitate placement of counterweights on the support rods 151.

[0036] By connecting the counterweight support frame 1 to the steel beam 6, it is convenient to achieve integration with the steel beam 6, and then be able to rotate with the steel beam 6. By setting the support rod 151, it is convenient to place the counterweight piece, and the placement area 172 makes it convenient to place the counterweight piece on the support rod 151. By combining the counterweight support frame 1 and the counterweight piece, the counterweight can be adjusted by adding or reducing the counterweight piece, thereby achieving counterweight balance more accurately.

[0037] The counterweight can be a steel rod, a water bag, or a concrete block. Steel rods have the advantage of being easy to hoist, but they are prone to slipping during rotation, shifting the center of gravity of the rotating structure and posing a significant safety risk. Water bags are easier to install and allow precise adjustment of the counterweight by varying the weight of the water inside. However, they are highly fluid, resulting in an unstable center of gravity during rotation and a significant safety risk. Concrete blocks offer greater stability, maintain a stable center of gravity during rotation, and offer increased safety. Therefore, concrete blocks are preferred, and placement area 172 is designed primarily for their placement.

[0038] In order to fix the counterweight support frame 1 on the steel beam 6, a support base plate 2 is fixedly connected to the steel beam 6, and a connecting plate is fixedly connected to one end of the counterweight support frame 1 facing the steel beam 6. The bottom surface of the connecting plate abuts the top surface of the support top plate, and a cover plate 11 is hinged on the connecting plate. The cover plate 11 abuts the top surface of the steel beam 6 and is fixedly connected to the top surface of the steel beam 6 by the second locking bolt 111. The connecting plate is fixedly connected to the side wall of the steel beam 6 by the first locking bolt 12.

[0039] The counterweight support frame 1 is supported by the supporting base plate 2, and the counterweight support frame 1 is fixedly connected to the steel beam 6 through the cover plate 11, and then the connecting plate is fixedly connected to the side wall of the steel beam 6 through the first locking bolt 12 to realize the connection between the counterweight support frame 1 and the steel beam 6. The connection method is relatively simple and quick, and has high strength.

[0040] Specifically, a diagonal brace 13 is hinged on the bottom surface of the counterweight support frame 1, and the end of the diagonal brace 13 away from the counterweight support frame 1 is hinged to the concrete pier 4. The diagonal brace 13 facilitates the support of the counterweight support frame 1 to improve its bearing capacity. At the same time, it can form a triangular stable structure with the concrete pier 4 and the counterweight support frame 1 to further improve the stability of the counterweight support frame 1.

[0041] In addition, a temporary bracket 3 is connected to the bottom of the counterweight support frame 1. The temporary bracket 3 is installed on the ground and is suitable for temporarily supporting the counterweight support frame 1. The temporary bracket 3 will be removed before the rotation. Two fixing plates 14 are fixedly connected to the bottom surface of the counterweight support frame 1. The two fixing plates 14 are arranged on both sides of the temporary bracket 3. The same fixing pin 141 is connected between the two fixing plates 14. The fixing pin 141 and the fixing plate 14 connect the counterweight support frame 1 to the temporary bracket 3.

[0042] Working principle: During construction, first weld the support base plate 2 to the steel beam 6 and install the temporary bracket 3. Then, use a crane to lift the counterweight support frame 1 and place it on the support base plate 2 and temporary bracket 3. Then, rotate the cover plate 11 until it contacts the top surface of the steel beam 6. Then, use the second locking bolts 111 to secure the cover plate 11 to the top surface of the steel beam 6. Then, use the first locking bolts 12 to secure the connecting plate to the side wall of the steel beam 6. Then, use the fixing plate 14 and fixing pin 141 to connect the counterweight support frame 1 to the temporary bracket 3. Finally, install the diagonal brace 13 between the counterweight support frame 1 and the concrete pier 4.

[0043] A construction method, based on the above-mentioned rotating portal pier unbalanced counterweight structure, comprises the following steps:

[0044] S1. Install a temporary bracket 3 on the ground and weld the supporting base plate 2 on the steel beam 6.

[0045] S2. Then, the counterweight support frame 1 is lifted by a crane and placed on the supporting base plate 2 and the temporary support 3.

[0046] S3. Rotate the cover plate 11 until it contacts the top surface of the steel beam 6. Then, securely connect the cover plate 11 to the top surface of the steel beam 6 using the second locking bolts 111. Securely connect the connecting plate to the side wall of the steel beam 6 using the first locking bolts 12. Then, connect the counterweight support frame 1 to the temporary support 3 using the fixing plate 14 and fixing pins 141. Finally, install the diagonal brace 13 between the counterweight support frame 1 and the concrete pier 4.

[0047] S4. Hoist the counterweights and place them on the support rods 151. To improve the positioning accuracy of the counterweights and reduce safety hazards, adjust the position of the counterweights using the adjustment device during hoisting. When placing the counterweights, place them layer by layer, with each layer surrounding the placement area 172. Place the counterweights around the placement area 172 first, then the counterweights located within the placement area 172.

[0048] Reference Figures 2 to 6 Specifically, the concrete blocks are placed in the order of 1-12. This order is a preferred method. Other methods that can complete and stably place the concrete blocks are also acceptable.

[0049] The adjustment device 7 includes a locking assembly 71, a moving assembly 72, and a locking hook 73. The locking assembly 71 is connected to the counterweight support frame 1 and is suitable for fixing the moving assembly 72 to the counterweight support frame 1. The moving assembly 72 is mounted on the locking assembly 71, and the movable end of the moving assembly 72 is connected to the locking hook 73. The locking hook 73 is suitable for hooking the lifting rope to assist the lifting rope in moving, so that the concrete block is moved to the corresponding position.

[0050] Specifically, the locking assembly 71 includes a fixed rod 711 and a base plate 712. Two fixed rods 711 and two base plates 712 are provided, each connected to the bottom of the movable assembly 72. The fixed rods 711 are inserted into the corresponding base plates 712 but do not penetrate the base plates 712. The base plates 712 are connected to the fixed rods 711 via bolts. A sliding plate 713 slides vertically on the fixed rods 711. The sliding plates 713 and the fixed plates 14 are arranged vertically opposite each other on either side of the component rod at the bottom of the counterweight support frame 1 and are fixedly connected to the component rod via bolts.

[0051] Specifically, the moving component 72 includes a bottom frame 721, a slider 722 and a locking rod 723. The bottom surface of the bottom frame 721 is fixedly connected to the two fixed rods 711. The slider 722 slides in the bottom frame 721 along the width direction of the counterweight support frame 1. The locking rod 723 slides in the slider 722 along the length direction of the counterweight support frame 1, and the locking rod 723 is connected to the locking hook 73.

[0052] More specifically, a T-shaped slot 724 is defined within the base frame 721 along the width of the counterweight support frame 1, and the slider 722 slides within the T-shaped slot 724. A slot 7221 is defined within the slider 722 along the length of the counterweight support frame 1, and the lock rod 723 slides within the slot 7221. The lock rod 723 is arrayed with a plurality of latching teeth 7231 along the length of the counterweight support frame 1, with slots 7232 formed between adjacent latching teeth 7231. A latching rod 7222 slides within the slider 722, which can be inserted into the slot 7232 to prevent the slot 7232 from moving.

[0053] Furthermore, the end of the locking rod 723 near the locking hook 73 is fixedly connected to a sliding cylinder 725, and the locking hook 73 is fixedly connected to a sliding block 726. The sliding block 726 slides within the sliding cylinder 725 along the width direction of the counterweight support frame 1. The sliding cylinder 725 is provided with a compression spring 727, one end of which abuts the sliding block 726, and the other end abuts the inner wall of the sliding cylinder 725. A wire rope 728 is provided within the locking rod 723. One end of the wire rope 728 is fixedly connected to the sliding block 726, and the other end extends to the end of the locking rod 723 away from the sliding cylinder 725, so as to pull the sliding block 726, causing the sliding block 726 to overcome the elastic force of the compression spring 727 and slide. An adjusting bolt 729 is threadedly connected to the side wall of the locking rod 723, and the head of the adjusting bolt 729 is suitable for abutting the wire rope 728 to lock the wire rope 728. Adjusting the position of the locking hook 73 relative to the sliding cylinder 725 facilitates fine-tuning in some situations, further improving the placement accuracy of the concrete block.

[0054] In addition, the lock hook 73 is rotatably connected to a plurality of rollers, and the end of the sliding cylinder 725 away from the lock rod 723 is also provided with rollers, so that rollers contact the rope in all four directions (front, back, left, and right). This reduces friction between the rope and the lock hook 73 when the rope moves, thereby reducing wear on the rope and the lock hook 73. The rollers on the sliding cylinder 725 can be provided at the corners of the sliding cylinder 725.

[0055] The adjustment device is located above the temporary support 3. This allows for the construction of an operating platform and protective devices directly on the temporary support 3, protecting operators from injury. The manual control of the adjustment device also allows for the identification of problems and prompt communication and adjustment, ensuring maximum reliability in the placement of the concrete blocks.

[0056] Working principle: when lifting the concrete block, after the concrete block is located in the counterweight support frame 1, move the slider 722 and the locking rod 723 so that the lock hook 73 hooks the lifting rope, and then move the locking rod 723 first to make the concrete block in place along the length direction of the counterweight support frame 1, and then insert the clamping rod 7222 into the corresponding clamping slot 7232, and then move the slider 722 again to make the concrete block in place along the width direction of the counterweight support frame 1, and then the lifting rope continues to descend so that the concrete block falls to the designated position.

[0057] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A rotating portal pier unbalanced counterweight structure, characterized by: The invention comprises a counterweight support frame (1) arranged on a steel crossbeam (6), wherein the counterweight support frame (1) comprises a bottom frame (15), a side frame (16) and a top frame (17) connected in sequence, wherein the bottom frame (15) is provided with a support rod (151), wherein a plurality of support rods (151) are arranged in an array along the length direction of the counterweight support frame (1), wherein two side frames (16) are provided, and both are connected to the top frame (17) and the bottom frame (15) at the same time, wherein a reinforcing rod (171) is provided in the top frame (17), wherein a counterweight is placed on the support rod (151), and an insertion area (171) is provided between the reinforcing rod (171) and the side wall of the top frame (17). 72), so that the counterweight can be placed on the support rod (151), the steel beam (6) is fixedly connected to a support bottom plate (2), the counterweight support frame (1) is provided with a connecting plate (112) at one end facing the steel beam (6), the bottom surface of the connecting plate (112) is in contact with the top surface of the support top plate, the connecting plate (112) is fixedly connected to the side wall of the steel beam (6) by a first locking bolt (12), a cover plate (11) is hinged on the connecting plate (112), the cover plate (11) is in contact with the top surface of the steel beam (6), and is fixedly connected to the top surface of the steel beam (6) by a second locking bolt (111); An oblique support rod (13) is hinged on the bottom surface of the counterweight support frame (1), and one end of the oblique support rod (13) away from the counterweight support frame (1) is hinged to the concrete pier (4); The invention also includes an adjusting device (7), wherein the adjusting device (7) includes a locking assembly (71) connected to the counterweight support frame (1), a moving assembly (72) provided on the locking assembly (71), and a locking hook (73) connected to the movable end of the moving assembly (72), wherein the locking hook (73) is suitable for hooking the lifting rope to assist the movement of the lifting rope.

2. The unbalanced counterweight structure of the rotating portal pier according to claim 1, characterized in that: The counterweight is a steel rod, a water bag or a concrete block.

3. The unbalanced counterweight structure of the rotating portal pier according to claim 1, characterized in that: The moving assembly (72) includes A bottom frame (721) is connected to the locking assembly (71); The slider (722) slides in the bottom frame (721) along the width direction of the counterweight support frame (1); The locking rod (723) slides in the slider (722) along the length direction of the counterweight support frame (1), and the locking rod (723) is connected to the locking hook (73).

4. The unbalanced counterweight structure of the rotating portal pier according to claim 3, characterized in that: The locking rod (723) is connected to a sliding cylinder (725), and the locking hook (73) is connected to a sliding block (726). The sliding block (726) slides in the sliding cylinder (725) along the width direction of the counterweight support frame (1). A compression spring (727) is provided in the sliding cylinder (725). One end of the compression spring (727) abuts against the sliding block (726), and the other end abuts against the inner wall of the sliding cylinder (725). A steel wire rope (728) is provided in the locking rod (723). The steel wire rope (728) is connected to the sliding block (726) so as to pull the sliding block (726) to overcome the elastic force of the compression spring (727) and slide. The end of the steel wire rope (728) away from the sliding block (726) extends to the end of the locking rod (723) away from the sliding cylinder (725); A T-shaped sliding groove (724) is provided in the bottom frame (721) along the width direction of the counterweight support frame (1), and the slider (722) slides in the T-shaped sliding groove (724); A sliding groove (7221) is provided in the sliding groove (7221) along the length direction of the counterweight support frame (1), and the locking rod (723) slides in the sliding groove (7221); a plurality of latching teeth (7231) are arranged in an array along the length direction of the counterweight support frame (1), and a latching groove (7232) is formed between adjacent latching teeth (7231); a latching rod (7222) slides in the sliding block (722), and the latching rod (7222) can be inserted into the latching groove (7232) to prevent the latching groove (7232) from moving; The locking hook (73) is rotatably connected to a plurality of rollers.

5. The unbalanced counterweight structure of the rotating portal pier according to claim 4, characterized in that: A temporary bracket (3) is connected below the counterweight support frame (1), and the temporary bracket (3) is arranged on the ground. Two fixing plates (14) are connected to the bottom surface of the counterweight support frame (1), and the two fixing plates (14) are arranged on both sides of the temporary bracket (3) opposite to each other. A same fixing pin (141) is connected between the two fixing plates (14).

6. A construction method for a rotating portal pier unbalanced counterweight structure, based on the rotating portal pier unbalanced counterweight structure of claim 5, characterized in that: Includes the following steps S1. Install a temporary support (3) on the ground and weld the supporting base plate (2) on the steel beam (6); S2, hoisting the counterweight support frame (1), and placing the counterweight support frame (1) on the temporary bracket (3) and the supporting base plate (2); S3, connecting the counterweight support frame (1) with the temporary support (3) and the steel beam (6); S4, hoisting the counterweight, so that the counterweight is placed on the support rod (151).

7. The construction method of the rotating portal pier unbalanced counterweight structure according to claim 6, characterized in that: In step S7, when placing the counterweights, the counterweights are placed layer by layer, and each layer of counterweights is placed around the placement area (172). The counterweights around the placement area (172) are placed first, and then the counterweights located at the placement area (172) are placed. During hoisting, the positions of the counterweights are adjusted using the adjusting device (7).

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