Cantilever formwork hoisting tool for double-curvature arch dam and construction method

Abstract

The cantilever formwork hoisting tool for the double-curvature arch dam comprises a bottom frame, two inclined rods used for hanging hoisting equipment are arranged on the bottom frame, and each inclined rod comprises a supporting rod fixedly connected to the bottom frame and a sliding rod used for sliding in the extending direction of the supporting rod; hanging holes used for hanging hoisting equipment are formed in the sliding rods, and all the sliding rods are connected with driving assemblies used for driving the sliding rods to move front and back in the extending direction of the supporting rods. The driving assembly comprises a connecting rod connected between the two sliding rods, the connecting rod comprises a hinge rod hinged to the inclined rods and a sleeve rod coaxially sleeved with the hinge rod, a driving rod is connected to the side wall of the sleeve rod and connected with a motor through a synchronous belt, and the two inclined rods and the connecting rod are located in the same plane. The driving rod is perpendicular to the plane where the two inclined rods are located, and an output shaft of the motor is parallel to the driving rod. The rotating angle of the cantilever formwork in the horizontal direction can be controlled through the motor, safety is high, and precision is high.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, and particularly relates to a cantilever formwork hoisting tooling and construction method for a hyperbolic arch dam. Background Art

[0002] A hyperbolic arch dam refers to an arch dam that is bent in two directions (horizontally and vertically). It is the most representative dam type among arch dams. The horizontal bending of the hyperbolic arch dam can play the role of an arch, and the vertical bending can achieve variable centers and variable radii to adjust the curvature and radius of the upper and lower parts of the arch dam.

[0003] During the pouring process of a hyperbolic arch dam, a cantilever formwork needs to be used for construction. When the dam shoulders on both sides of the hyperbolic arch dam are steep cliffs, the existing roads cannot meet the requirements for construction machinery to enter the site for conventional concrete pouring construction, and it is difficult to continue to lift the cantilever formwork upward after pouring one layer.

[0004] During the construction of a hyperbolic arch dam, when positioning the cantilever formwork, since the hyperbolic arch dam has both vertical and horizontal bends, to form the vertical bend, after hanging a lifting device on the top of the cantilever formwork to lift the cantilever formwork, fix the lower end of the cantilever formwork, and adjusting the adjustable diagonal rod on the cantilever formwork or by adjusting the wire release length of the lifting device can achieve the effect of making the cantilever formwork have a vertical inclination.

[0005] To form the horizontal bend, it is necessary for workers to manually adjust and position the rotation angle of the cantilever formwork on the horizontal plane, which is relatively dangerous and has low precision. Summary of the Invention

[0006] The purpose of the present invention is to provide a cantilever formwork hoisting tooling and construction method for a hyperbolic arch dam, which can control the rotation angle of the cantilever formwork in the horizontal direction by a motor, with high safety and high precision.

[0007] To solve the above technical problems, the present invention adopts the following solutions: In a first aspect, a hoisting tool for a cantilever formwork of a hyperbolic arch dam includes a chassis. Two inclined rods for hanging a hoisting device are provided on the chassis. The inclined rods include a support rod fixedly connected to the chassis and a sliding rod that can slide along the extending direction of the support rod. Hanging holes for hanging the hoisting device are provided on the sliding rod. All the sliding rods are connected with a driving assembly for driving the sliding rod to move forward and backward along the extending direction of the support rod. Any existing small hoisting device with a hook can be used as the hoisting device, such as an electric hoist, a small crane, etc. Support feet or locking casters are provided on the bottom surface of the chassis. Its function is that after the hoisting devices on each sliding rod respectively hook one end of the cantilever formwork, through the setting of the sliding rod and the driving assembly, one of the sliding rods can be driven to move forward and the other sliding rod can be driven to move backward, so that a distance difference is generated between the two sliding rods in the front-back direction, thereby causing the cantilever formwork to tilt horizontally, so as to meet the requirements of the horizontal bending of the hyperbolic arch dam, and there is no need for workers to manually adjust the rotation angle, with high safety and high precision; through the design of the number of sliding rods, two hoisting devices can be hung, thus being able to prevent the large rotation caused by a single hoisting device lifting the cantilever formwork.

[0008] Further, the driving assembly includes a connecting rod connected between the two sliding rods. The connecting rod includes a hinged rod hinged on the inclined rod and a sleeve rod that is coaxially sleeved with the hinged rod. A driving rod is connected to the side wall of the sleeve rod. The driving rod is connected with a motor through a synchronous belt. The two inclined rods and the connecting rod are located in the same plane. The driving rod is perpendicularly arranged with respect to the plane where the two inclined rods are located. The output shaft of the motor is parallel to the driving rod. The rotating shaft on the hinged rod is parallel to the driving rod. A cylindrical socket cavity is provided inside the hinged rod towards the driving rod end. The sleeve rod is cylindrical, and the outer diameter of the sleeve rod is equal to the inner diameter of the socket cavity. Its function is that through the setting of the motor, the synchronous belt, the driving rod, and the connecting rod, when the motor drives the driving rod to rotate through the synchronous belt, the connecting rod can push out one sliding rod while retracting the other sliding rod, so as to achieve the effect of generating a distance difference between the two sliding rods in the front-back direction; since the distance between the rotating shaft on the hinged rod and the driving shaft will change when the sliding rod moves forward and backward, through the setting of the connection relationship between the hinged rod and the sleeve rod, the lengths of the connecting rod on both sides of the driving rod can change with the movement of the sliding rod, so that the sliding rod can move forward and backward smoothly.

[0009] Further, a support plate is connected between the two support rods. A fixing plate for fixing the driving rod is connected to the support plate. A fixing hole for the driving rod to pass through is provided on the fixing plate. Its function is that through the setting of the fixing hole, the driving rod can be radially fixed to ensure that the driving rod can rotate around its own axis in the fixing hole.

[0010] Furthermore, the inner diameter of the fixing hole is equal to the outer diameter of the driving rod. A support ring for supporting on the top surface of the fixing plate is connected to the driving rod. The outer diameter of the support ring is greater than the outer diameter of the driving rod. A gear section for meshing with the synchronous belt is provided on the driving rod, and the outer diameter of the gear section is smaller than the inner diameter of the fixing hole. Its function is that through the setting of the support ring, the height where the driving rod is located can be fixed, avoiding the downward movement of the driving rod along its own axis.

[0011] Furthermore, the fixing plate is arranged on the bottom surface of the support plate. At least one fixed pulley is provided on the top surface of the support plate. Hanging rings are provided on the sliding rod, and a connecting rope passing around the fixed pulley is connected between the two hanging rings. The connecting rope is made of steel wire rope. Its function is that through the setting of the fixed pulley and the connecting rope, the two sliding rods can be connected, and combined with the setting of the fixed pulley and the support rod, the movement range of the two sliding rods can be restricted, thus preventing the sliding rod from falling off the support rod.

[0012] Furthermore, the fixed pulley includes a wheel axle. Side plates are provided on the top surface of the support rod, and a cover plate is connected to the side plates by bolts. Embedding grooves for embedding the end portions of the wheel axle are provided on both the cover plate and the support plate. Any existing anti-rotation structure is used for the cooperation between the wheel axle and the embedding groove, such as the section of the wheel axle located in the embedding groove and the embedding groove are both prism-shaped, or the wheel axle and the embedding groove are connected by a key. Its function is that through the setting of the cover plate and the embedding groove, the wheel axle can be positioned, so as to transfer the force transmitted from the sliding rod to the connecting rope to the fixed pulley, and the wheel axle and the embedding groove bear the force.

[0013] Furthermore, a hanging ring for hanging a fixing rope is provided on the support rod, and the fixing rope is used for fixing on the top surface of the already poured and solidified concrete. The fixing rope itself is an existing technology and is connected to the ground anchor on the concrete, which will not be elaborated.

[0014] Furthermore, sliding grooves are provided on the left and right sides of the support rod, and sliding strips for embedding into the sliding grooves are provided on the left and right sides of the inner wall of the sliding rod. Its function is that through the design of arranging the sliding grooves on the left and right sides of the support rod, part of the force received by the sliding rod is transferred to the sliding grooves, playing a certain role in dispersing the force received by the sliding rod.

[0015] Furthermore, the top of the sliding rod is in the shape of a solid cylinder. The sliding grooves are not provided at the bottom of the support rod. A reinforcing rib is provided below the top end of the sliding rod, and the hanging hole is provided on the reinforcing rib. The bottom end of the section of the sliding rod provided with the sliding strip is open. A reinforcing straight rod is connected between the bottom end of the section of the support rod provided with the sliding groove and the chassis, and a reinforcing inclined rod is connected between the bottom end of the section of the support rod not provided with the sliding groove and the chassis. The reinforcing straight rod is perpendicular to the chassis, and the reinforcing inclined rod is inclined with respect to the chassis. Its function is that through the setting of the reinforcing rib, the overall structural strength of the sliding rod can be enhanced; through the setting of the reinforcing straight rod and the reinforcing inclined rod, the overall structural strength of the support rod can be enhanced.

[0016] In a second aspect, a cantilever formwork construction method for a hyperbolic arch dam is applied to the above-mentioned cantilever formwork hoisting tooling for a hyperbolic arch dam, and includes the following steps: Step S1: Hang two lifting devices on the hanging holes on two sliding rods respectively; Step S2: Hang the hooks of the two lifting devices on the two lifting lugs of the cantilever formwork respectively; Step S3: Lift the cantilever formwork; Step S4: Start the driving assembly to drive one of the sliding rods to move forward and drive the other sliding rod to move backward, and at the same time adjust the wire release lengths of the two lifting devices so that the two lifting lugs of the cantilever formwork are in a state of the same height, and adjust the left or right rotation angle of the cantilever formwork according to the installation requirements of the cantilever formwork.

[0017] It further includes the following steps: Step S0: Before step S1, first connect the fixing rope to the lifting ring, and then connect the fixing rope to the ground anchor on the solidified concrete to complete the fixation of the hoisting tooling.

[0018] The beneficial effects of the present invention are as follows: 1. After the lifting devices on each sliding rod respectively hold one end of the cantilever formwork, through the setting of the sliding rod and the driving assembly, one of the sliding rods can be driven to move forward and the other sliding rod can be driven to move backward, so that a distance difference is generated between the two sliding rods in the front and rear directions, so that the cantilever formwork is tilted horizontally, so as to meet the horizontal bending requirements of the hyperbolic arch dam, and there is no need for workers to manually adjust the rotation angle, with high safety and high precision; through the design of the number of sliding rods, two lifting devices can be hung, so as to avoid the large rotation caused by a single lifting device lifting the cantilever formwork; 2. Through the setting of the motor, synchronous belt, driving rod and connecting rod, when the motor drives the driving rod to rotate through the synchronous belt, the connecting rod can push out one sliding rod while retracting the other sliding rod, so as to achieve the effect of generating a distance difference between the two sliding rods in the front and rear directions; since the distance between the rotating shaft on the articulated rod and the driving shaft will change when the sliding rod moves back and forth, through the setting of the connection relationship between the articulated rod and the sleeve rod, the lengths of the connecting rod on both sides of the driving rod can change with the movement of the sliding rod, so that the sliding rod can move forward and backward smoothly. Description of the Drawings

[0019] Figure 1 It is a three-dimensional structure diagram of Embodiment 1 (the connecting rope is not drawn); Figure 2 It is a structure diagram of Embodiment 1 without including the cover plate.

[0020] Reference Numerals: 1, chassis; 2, diagonal rod; 3, support rod; 4, sliding rod; 5, hanging hole; 6, connecting rod; 7, articulated rod; 8, sleeve rod; 9, driving rod; 10, motor; 11, support plate; 12, fixing plate; 13, fixing hole; 14, support ring; 15, synchronous belt; 16, fixed pulley; 17, hanging ring; 18, connecting rope; 19, side plate; 20, cover plate; 22, lifting ring; 23, sliding groove; 25, reinforcing rib; 26, reinforcing straight rod; 27, reinforcing diagonal rod. Detailed Embodiment

[0021] The following further elaborates on the present invention in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "provided with", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Embodiment 1 First aspect, a hoisting tool for a cantilever formwork of a hyperbolic arch dam, as Figure 1As shown, it includes a chassis 1, on which there are two diagonal rods 2 for hanging lifting equipment. The diagonal rod 2 includes a support rod 3 fixedly connected to the chassis 1 and a sliding rod 4 that can slide along the extending direction of the support rod 3. There is a hanging hole 5 for hanging lifting equipment on the sliding rod 4. All the sliding rods 4 are connected with a driving component for driving the sliding rod 4 to move back and forth along the extending direction of the support rod 3. Any existing small lifting equipment with a hook can be used as the lifting equipment, such as an electric hoist, a small crane, etc. There are feet or locking casters on the bottom surface of the chassis 1. Its function is that after the lifting equipment on each sliding rod 4 hangs one end of the cantilever formwork respectively, through the setting of the sliding rod 4 and the driving component, one of the sliding rods 4 can be driven to move forward and the other sliding rod 4 can be driven to move backward, so that a distance difference is generated between the two sliding rods 4 in the front-back direction, thereby causing the cantilever formwork to tilt horizontally, so as to meet the horizontal bending requirements of the double-curved arch dam, and there is no need for workers to manually adjust the rotation angle, with high safety and high precision; through the design of the number of sliding rods 4, two lifting equipment can be hung, thus being able to prevent the large rotation caused by a single lifting equipment lifting the cantilever formwork.

[0025] Specifically, as Figure 1 shown, the driving component includes a connecting rod 6 connected between the two sliding rods 4. The connecting rod 6 includes a hinged rod 7 hinged on the diagonal rod 2 and a sleeve rod 8 that is coaxially sleeved with the hinged rod 7. A driving rod 9 is connected to the side wall of the sleeve rod 8. The driving rod 9 is connected with a motor 10 through a synchronous belt 15. The two diagonal rods 2 and the connecting rod 6 are in the same plane. The driving rod 9 is perpendicularly arranged to the plane where the two diagonal rods 2 are located. The output shaft of the motor 10 is parallel to the driving rod 9. The rotating shaft on the hinged rod 7 is parallel to the driving rod 9. There is a cylindrical socket cavity inside the hinged rod 7 towards one end of the driving rod 9. The sleeve rod 8 is cylindrical, and the outer diameter of the sleeve rod 8 is equal to the inner diameter of the socket cavity. Its function is that through the setting of the motor 10, the synchronous belt 15, the driving rod 9, and the connecting rod 6, when the motor 10 drives the driving rod 9 to rotate through the synchronous belt 15, it can make the connecting rod 6 push out one of the sliding rods 4 while retracting the other sliding rod 4, so as to achieve the effect of generating a distance difference between the two sliding rods 4 in the front-back direction; since the distance between the rotating shaft on the hinged rod 7 and the driving shaft will change when the sliding rod 4 moves back and forth, through the setting of the connection relationship between the hinged rod 7 and the sleeve rod 8, the lengths of the connecting rod 6 on both sides of the driving rod 9 can change with the movement of the sliding rod 4, so that the sliding rod 4 can move back and forth smoothly.

[0026] Specifically, as Figure 1As shown, a support plate 11 is connected between the two support rods 3. A fixing plate 12 for fixing the driving rod 9 is connected to the support plate 11. A fixing hole 13 for the driving rod 9 to pass through is provided on the fixing plate 12. Its function is that through the setting of the fixing hole 13, the driving rod 9 can be radially fixed to ensure that the driving rod 9 can rotate around its own axis within the fixing hole 13.

[0027] Specifically, as Figure 1 shown, the inner diameter of the fixing hole 13 is equal to the outer diameter of the driving rod 9. A support ring 14 for supporting on the top surface of the fixing plate 12 is connected to the driving rod 9. The outer diameter of the support ring 14 is greater than the outer diameter of the driving rod 9. A gear section for meshing with the synchronous belt 15 is provided on the driving rod 9. The outer diameter of the gear section is smaller than the inner diameter of the fixing hole 13. A gear for meshing with the synchronous belt 15 is key-connected to the output shaft of the motor 10. (Not shown in the figure). Its function is that through the setting of the support ring 14, the height of the driving rod 9 can be fixed to prevent the driving rod 9 from moving downward along its own axis; through the dimension design of the gear section and the driving rod 9, the synchronous belt 15 can be prevented from sliding axially along the driving rod 9.

[0028] Specifically, as Figure 2 shown, the fixing plate 12 is provided on the bottom surface of the support plate 11. At least one fixed pulley 16 is provided on the top surface of the support plate 11. A hanging ring 17 is provided on the sliding rod 4. A connecting rope 18 that bypasses the fixed pulley 16 is connected between the two hanging rings 17. The connecting rope 18 is made of steel wire rope. Its function is that through the setting of the fixed pulley 16 and the connecting rope 18, the two sliding rods 4 can be connected, and combined with the setting of the fixed pulley 16 and the support rod 3, the movement range of the two sliding rods 4 can be restricted, so as to prevent the sliding rod 4 from falling off the support rod 3.

[0029] Specifically, as Figure 1 shown, the fixed pulley 16 includes a wheel shaft. Side plates 19 are provided on the top surface of the support rod 3. A cover plate 20 is bolt-connected to the side plates 19. Embedding grooves for embedding the end portions of the wheel shaft are provided on both the cover plate 20 and the support plate 11. The top end of the wheel shaft is located in the embedding groove on the cover plate 20, and the bottom end of the wheel shaft is located in the embedding groove on the support plate 11. Any existing anti-rotation structure is used for the cooperation between the wheel shaft and the embedding groove, such as the section of the wheel shaft located in the embedding groove and the embedding groove are both prism-shaped, or the wheel shaft and the embedding groove are key-connected. Its function is that through the setting of the cover plate 20 and the embedding groove, the wheel shaft can be positioned, so as to transmit the force transmitted by the sliding rod 4 to the connecting rope 18 to the fixed pulley 16, and the wheel shaft and the embedding groove are stressed.

[0030] Specifically, as Figure 1As shown in the figure, a hanging ring 22 for hanging a fixing rope is provided on the support rod 3. The fixing rope is used to be fixed on the top surface of the cast and solidified concrete. The fixing rope itself is a prior art and is connected to the ground anchor on the concrete, which will not be elaborated here.

[0031] Specifically, as Figure 1 shown in the figure, sliding grooves 23 are provided on the left and right sides of the support rod 3, and sliding strips for embedding into the sliding grooves 23 are provided on the left and right sides of the inner wall of the sliding rod 4. Its function is that by setting the sliding grooves 23 on the left and right sides of the support rod 3, a part of the force received by the sliding rod 4 is transmitted to the sliding grooves 23, playing a certain role in dispersing the force on the sliding rod 4.

[0032] Specifically, as Figure 1 shown in the figure, the top of the sliding rod 4 is in the shape of a solid cylinder, no sliding groove 23 is provided at the bottom of the support rod 3, a reinforcing rib 25 is provided below the top end of the sliding rod 4, a hanging hole 5 is provided on the reinforcing rib 25, the bottom end of the section of the sliding rod 4 with the sliding strip is open, a reinforcing straight rod 26 is connected between the bottom end of the section of the support rod 3 with the sliding groove 23 and the chassis 1, and a reinforcing inclined rod 27 is connected between the bottom end of the section of the support rod 3 without the sliding groove 23 and the chassis 1. The reinforcing straight rod 26 is perpendicular to the chassis 1, and the reinforcing inclined rod 27 is inclined with respect to the chassis 1. Its function is that by setting the reinforcing rib 25, the overall structural strength of the sliding rod 4 can be enhanced; by setting the reinforcing straight rod 26 and the reinforcing inclined rod 27, the overall structural strength of the support rod 3 can be enhanced.

[0033] Second, a construction method for a cantilever formwork for a double-curvature arch dam, which is applied to the above-mentioned hoisting tooling for a cantilever formwork for a double-curvature arch dam, includes the following steps: Step S1: Hang two lifting devices on the hanging holes 5 on the two sliding rods 4 respectively; Step S2: Hang the hooks of the two lifting devices on the two lifting lugs of the cantilever formwork respectively; Step S3: Lift the cantilever formwork; Step S4: Start the driving assembly to drive one of the sliding rods 4 to move forward and drive one of the sliding rods 4 to move backward. At the same time, adjust the wire release lengths of the two lifting devices so that the two lifting lugs of the cantilever formwork are in a state of the same height, and adjust the left or right rotation angle of the cantilever formwork according to the installation requirements of the cantilever formwork.

[0034] It also includes the following steps: Step S0: Before step S1, first connect the fixing rope to the hanging ring 22, and then connect the fixing rope to the ground anchor on the solidified concrete to complete the fixation of the hoisting tooling.

[0035] The working principle of this embodiment is described as follows: When the lifting devices on the two sliding rods 4 are both hung on different lifting lugs of the same cantilever formwork, the gravity of the cantilever formwork is transmitted to the sliding rods 4. Part of the force on the sliding rods 4 is transmitted to the sliding grooves 23, and the other part is transmitted to the fixed pulleys 16. The forces on the sliding grooves 23 and the fixed pulleys 16 are both transmitted to the support rods 3. Part of the force on the support rods 3 is transmitted to the chassis 1, and the other part is transmitted to the fixed ropes.

[0036] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Based on the technical essence of the present invention, any simple modifications, equivalent replacements, and improvements made to the above embodiments within the spirit and principles of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A hoisting tool for a cantilever formwork of a hyperbolic arch dam, characterized in that: It includes a chassis (1), and two diagonal rods (2) for hanging a lifting device are provided on the chassis (1). The diagonal rod (2) includes a support rod (3) fixedly connected to the chassis (1) and a sliding rod (4) for sliding along the extending direction of the support rod (3). A hanging hole (5) for hanging the lifting device is provided on the sliding rod (4), and all the sliding rods (4) are connected with a driving assembly for driving the sliding rod (4) to move back and forth along the extending direction of the support rod (3).

2. The cantilever formwork hoisting tooling for a hyperbolic arch dam according to claim 1, wherein: The driving assembly includes a connecting rod (6) connected between the two sliding rods (4). The connecting rod (6) includes a hinged rod (7) hinged on the diagonal rod (2) and a sleeve rod (8) coaxially sleeved with the hinged rod (7). A driving rod (9) is connected to the side wall of the sleeve rod (8). The driving rod (9) is connected with a motor (10) through a synchronous belt (15). The two diagonal rods (2) and the connecting rod (6) are located in the same plane. The driving rod (9) is perpendicularly arranged to the plane where the two diagonal rods (2) are located, and the output shaft of the motor (10) is parallel to the driving rod (9).

3. The cantilever formwork hoisting tooling for a hyperbolic arch dam according to claim 2, characterized in that: A support plate (11) is connected between the two support rods (3). A fixing plate (12) for fixing the driving rod (9) is connected to the support plate (11). A fixing hole (13) for the driving rod (9) to pass through is provided on the fixing plate (12).

4. The cantilever formwork hoisting tooling for a hyperbolic arch dam according to claim 3, characterized in that: The inner diameter of the fixing hole (13) is equal to the outer diameter of the driving rod (9). A support ring (14) for supporting on the top surface of the fixing plate (12) is connected to the driving rod (9). The outer diameter of the support ring (14) is larger than the outer diameter of the driving rod (9). A gear section for meshing with the synchronous belt (15) is provided on the driving rod (9), and the outer diameter of the gear section is smaller than the inner diameter of the fixing hole (13).

5. A hoisting tool for a cantilever formwork of a hyperbolic arch dam according to claim 3, characterized in that: The fixing plate (12) is arranged on the bottom surface of the support plate (11). At least one fixed pulley (16) is provided on the top surface of the support plate (11). A hanging ring (17) is provided on the sliding rod (4). A connecting rope (18) bypassing the fixed pulley (16) is connected between the two hanging rings (17).

6. The cantilever formwork hoisting tooling for a hyperbolic arch dam according to claim 5, characterized in that: The fixed pulley (16) includes a wheel shaft. A side plate (19) is provided on the top surface of the support rod (3). A cover plate (20) is connected to the side plate (19) by bolts. Embedding grooves for embedding the end portions of the wheel shaft are provided on both the cover plate (20) and the support plate (11).

7. A hoisting tool for a cantilever formwork of a hyperbolic arch dam according to claim 1, characterized in that: A hanging ring (22) for hanging a fixing rope is provided on the support rod (3), and the fixing rope is used for fixing on the top surface of the cast and solidified concrete.

8. A hoisting tool for a cantilever formwork of a hyperbolic arch dam according to claim 1, characterized in that: Sliding grooves (23) are provided on the left and right sides of the support rod (3). Sliding strips for embedding into the sliding grooves (23) are provided on the left and right inner walls of the sliding rod (4).

9. A cantilever formwork hoisting tool for a hyperbolic arch dam according to claim 8, characterized in that: The top of the sliding rod (4) is in the shape of a solid cylinder. The bottom of the support rod (3) is not provided with a sliding groove (23). A reinforcing rib (25) is provided below the top end of the sliding rod (4). The hanging hole (5) is provided on the reinforcing rib (25). The bottom end of the section of the sliding rod (4) where the sliding strip is provided is open. A reinforcing straight rod (26) is connected between the section of the support rod (3) where the sliding groove (23) is provided and the chassis (1). A reinforcing inclined rod (27) is connected between the section of the support rod (3) where the sliding groove (23) is not provided and the chassis (1). The reinforcing straight rod (26) is vertically arranged with respect to the chassis (1). The reinforcing inclined rod (27) is inclined with respect to the chassis (1).

10. A construction method for a cantilever formwork of a hyperbolic arch dam, characterized in that: Applied to a cantilever formwork hoisting tool for a hyperbolic arch dam according to any one of claims 1-9, it includes the following steps: Step S1: Hang two lifting devices on the hanging holes (5) on the two sliding rods (4) respectively; Step S2: Hang the hooks of the two lifting devices on the two lifting lugs of the cantilever formwork respectively; Step S3: Lift the cantilever formwork; Step S4: Start the driving assembly to drive one of the sliding rods (4) to move forward and drive one of the sliding rods (4) to move backward. At the same time, adjust the wire release lengths of the two lifting devices so that the two lifting lugs of the cantilever formwork are in a state of being at the same height, and adjust the left or right rotation angle of the cantilever formwork according to the installation requirements of the cantilever formwork.

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