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

Abstract

The application discloses a cantilever formwork hoisting tool and construction method for double-curvature arch dams, which comprises a chassis, two inclined rods for hanging hoisting equipment are arranged on the chassis, the inclined rod comprises a supporting rod fixedly connected to the chassis and a sliding rod for sliding along the extending direction of the supporting rod, the sliding rod is provided with a hanging hole for hanging the hoisting equipment, and all the sliding rods are connected with a driving assembly for driving the sliding rods to move back and forth along the extending direction of the supporting rod. The driving assembly comprises a connecting rod connected between the two sliding rods, the connecting rod comprises a hinged rod hinged to the inclined rod and a sleeve rod 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 arranged perpendicularly to the plane where the two inclined rods are located, and the output shaft of the motor is arranged in parallel with the driving rod. The cantilever formwork can be controlled in the horizontal upward turning angle through the motor, and the safety is high and the precision is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hoisting equipment, in particular to a cantilever formwork hoisting tool and construction method for double-curvature arch dam. BACKGROUND

[0002] Double-curvature arch dam refers to the arch dam with two-way (horizontal and vertical) bending. It is the most representative dam type among arch dams. The horizontal bending of double-curvature arch dam can play the role of arch, and the vertical bending can realize variable center and variable radius to adjust the curvature and radius of the upper and lower parts of the arch dam.

[0003] In the process of pouring the double-curvature arch dam, cantilever formwork needs to be used for construction, and when the dam abutments on both sides of the double-curvature arch dam are steep cliff type, the existing road cannot meet the construction machinery access for conventional concrete pouring construction. After pouring a layer, it is difficult to continue to lift the cantilever formwork upward.

[0004] In the process of positioning the cantilever formwork in the construction of the double-curvature arch dam, since the double-curvature arch dam has both vertical bending and horizontal bending, in order to form vertical bending, after the cantilever formwork is hung at the top of the cantilever formwork by the hoisting equipment, the lower end of the cantilever formwork is fixed, and the adjustable inclined rod on the cantilever formwork is adjusted or the length of the wire is adjusted by the hoisting equipment, so that the cantilever formwork has the effect of vertical inclination.

[0005] In order to form horizontal bending, the angle of rotation of the cantilever formwork on the horizontal plane needs to be manually adjusted and positioned by workers, which is relatively dangerous and has low precision. SUMMARY

[0006] The purpose of the present application is to provide a cantilever formwork hoisting tool and construction method for double-curvature arch dam, which can control the rotation angle of the cantilever formwork in the horizontal direction by a motor, has high safety and high precision.

[0007] To solve the above technical problems, the present application adopts the following scheme:

[0008] The first aspect is a cantilever formwork hoisting tool for double-curvature arch dams, comprising a chassis, two inclined rods for hanging hoisting equipment are arranged on the chassis, the inclined rod comprises a support rod fixedly connected to the chassis and a sliding rod sliding along the extension direction of the support rod, the sliding rod is provided with a hanging hole for hanging the hoisting equipment, and all the sliding rods are connected with a driving assembly for driving the sliding rods to move forward and backward along the extension direction of the support rod. The hoisting equipment can be any existing small hoisting equipment with hooks, such as an electric hoist or a small crane. The bottom surface of the chassis is provided with a supporting leg or a locking type caster. After the hoisting equipment on each sliding rod respectively hangs one end of the cantilever formwork, the sliding rod and the driving assembly can be used to drive one of the sliding rods to move forward and the other to move backward, so that the distance between the two sliding rods in the forward and backward directions is different, the cantilever formwork is horizontally inclined, the horizontal bending requirement of the double-curvature arch dam is met, manual adjustment of the rotation angle is not necessary, the safety is high, and the accuracy is high. Through the design of the number of sliding rods, two hoisting equipments can be hung, so that the large amplitude rotation of the cantilever formwork caused by a single hoisting equipment can be lifted.

[0009] Further, the driving assembly comprises a connecting rod connected between the two sliding rods, the connecting rod comprises a hinged rod hinged to the inclined rod and a sleeve rod coaxially sleeved with the hinged rod, the sleeve rod is connected with a driving rod on the side wall, 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 vertically arranged with the plane where the two inclined rods are located, and 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 sleeve cavity is arranged in one end of the hinged rod facing the driving rod, the sleeve rod is cylindrical, and the outer diameter of the sleeve rod is equal to the inner diameter of the sleeve cavity. Through the arrangement 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 retract the other sliding rod while pushing out one of the sliding rods, so as to achieve the effect that the distance between the two sliding rods in the forward and backward directions is different. Since the distance between the rotating shaft on the hinged rod and the driving shaft changes when the sliding rod moves forward and backward, the length of the connecting rod on both sides of the driving rod can change with the movement of the sliding rod through the connection between the hinged rod and the sleeve rod, so that the sliding rod can move forward and backward smoothly.

[0010] Further, the two support rods are connected with a support plate, the support plate is connected with a fixing plate for fixing the driving rod, and the fixing plate is provided with a fixing hole for the driving rod to pass through. Through the arrangement of the fixing hole, the driving rod can be fixed radially to ensure that the driving rod can rotate around its own axis in the fixing hole.

[0011] Further, the inner diameter of the fixing hole is equal to the outer diameter of the driving rod, a supporting ring for supporting on the top surface of the fixing plate is connected to the driving rod, the outer diameter of the supporting ring is greater than the outer diameter of the driving rod, a gear segment for engaging with the synchronous belt is arranged on the driving rod, and the outer diameter of the gear segment is smaller than the inner diameter of the fixing hole. The supporting ring is arranged to fix the height of the driving rod and prevent the driving rod from moving downward along the axis.

[0012] Further, the fixing plate is arranged on the bottom surface of the supporting plate, at least one fixed pulley is arranged on the top surface of the supporting plate, hanging rings are arranged on the sliding rods, and a connecting rope is arranged between the two hanging rings and passes through the fixed pulley. The connecting rope is made of steel wire. The fixed pulley and the connecting rope are arranged to connect the two sliding rods, and the fixed pulley and the supporting rod are arranged to limit the movement range of the two sliding rods, thereby preventing the sliding rods from falling off the supporting rod.

[0013] Further, the fixed pulley comprises a shaft, a side plate is arranged on the top surface of the supporting rod, a cover plate is connected to the side plate through bolts, and embedding grooves for embedding the ends of the shaft are arranged on the cover plate and the supporting plate. Any existing anti-rotation structure is used between the shaft and the embedding grooves, such as the shaft and the embedding grooves being prismatic or being connected through a key. The cover plate and the embedding grooves are arranged to position the shaft, thereby transmitting the force from the sliding rod to the connecting rope to the fixed pulley through the shaft and the embedding grooves.

[0014] Further, a hanging ring for hanging a fixing rope is arranged on the supporting rod, and the fixing rope is used to fix on the top surface of the poured and solidified concrete. The fixing rope itself is a prior art and is connected to the ground anchor on the concrete, which is not described in detail.

[0015] Further, the supporting rod is provided with sliding grooves on the left and right sides, and the sliding rod is provided with sliding bars embedded in the sliding grooves on the left and right sides of the inner wall. The sliding grooves are arranged on the left and right sides of the supporting rod to transmit part of the force received by the sliding rod to the sliding grooves, thereby dispersing the force received by the sliding rod.

[0016] Further, the top of the sliding rod is in the shape of a solid column, the bottom of the supporting rod is not provided with a sliding groove, a reinforcing rib is arranged below the top end of the sliding rod, the hanging hole is arranged on the reinforcing rib, the bottom end of the section of the sliding rod provided with the sliding bar is open, a reinforcing straight rod is connected between the bottom end of the section of the supporting rod provided with the sliding groove and the base frame, and a reinforcing inclined rod is connected between the bottom end of the section of the supporting rod not provided with the sliding groove and the base frame. The reinforcing straight rod is arranged vertically to the base frame, and the reinforcing inclined rod is arranged obliquely to the base frame. The reinforcing rib is arranged to enhance the structural strength of the sliding rod, and the reinforcing straight rod and the reinforcing inclined rod are arranged to enhance the structural strength of the supporting rod.

[0017] In a second aspect, a cantilever formwork construction method for a double-curvature arch dam is applied to the cantilever formwork hoisting tool for a double-curvature arch dam, and comprises the following steps:

[0018] Step S1, the two hoisting devices are hung on the hanging holes on the two sliding rods, respectively;

[0019] Step S2, the hooks of the two hoisting devices are hung on the two lifting lugs of the cantilever formwork, respectively;

[0020] Step S3, the cantilever formwork is lifted;

[0021] Step S4, the driving assembly is started to drive one of the sliding rods to move forward and the other sliding rod to move backward, and the wire lengths of the two hoisting devices are adjusted so that the two lifting lugs of the cantilever formwork are in the same height state, and the angle of the cantilever formwork is adjusted to turn left or right according to the installation requirement of the cantilever formwork.

[0022] Further comprising the following steps:

[0023] Step S0, before step S1, the fixing rope is connected with the lifting ring first, and then the fixing rope is connected with the ground anchor on the solidified concrete, so as to complete the fixation of the hoisting tool.

[0024] The present application has the beneficial effects:

[0025] 1. After the hoisting device on each sliding rod is hung on one end of the cantilever formwork, the sliding rod and the driving assembly can be used to drive one of the sliding rods to move forward and the other sliding rod to move backward, so that the distance difference between the two sliding rods in the front and back directions is generated, the cantilever formwork is horizontally inclined, the requirement of the double-curvature arch dam for horizontal bending is met, the rotation angle does not need to be manually adjusted by workers, the safety is high, and the precision is high; through the design of the number of sliding rods, two hoisting devices can be hung, so that the large rotation of the cantilever formwork hoisted by a single hoisting device is realized;

[0026] 2. When the motor drives the driving rod to rotate through the synchronous belt, the connecting rod can be pushed out of one of the sliding rods while being retracted into the other sliding rod, so that the distance difference between the two sliding rods in the front and back directions is generated; since the distance between the rotating shaft on the hinged rod and the driving shaft changes when the sliding rods move forward and backward, the length of the connecting rod on both sides of the driving rod can be changed with the movement of the sliding rods through the connection relationship between the hinged rod and the sleeve rod, so that the sliding rods can move forward and backward smoothly. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1A structural schematic diagram (connection ropes are not drawn) of Example 1;

[0028] Figure 2 A structural schematic diagram of Example 1 without including the cover plate.

[0029] Fig. 1 is a bottom frame; Fig. 2 is an inclined rod; Fig. 3 is a support rod; Fig. 4 is a sliding rod; Fig. 5 is a hanging hole; Fig. 6 is a connecting rod; Fig. 7 is a hinged rod; Fig. 8 is a sleeve rod; Fig. 9 is a driving rod; Fig. 10 is a motor; Fig. 11 is a support plate; Fig. 12 is a fixed plate; Fig. 13 is a fixed hole; Fig. 14 is a support ring; Fig. 15 is a synchronous belt; Fig. 16 is a fixed pulley; Fig. 17 is a hanging ring; Fig. 18 is a connection rope; Fig. 19 is a side plate; Fig. 20 is a cover plate; Fig. 22 is a lifting ring; Fig. 23 is a sliding groove; Fig. 25 is a reinforcing rib; Fig. 26 is a reinforcing straight rod; Fig. 27 is a reinforcing inclined rod. DETAILED DESCRIPTION

[0030] The application will be further described below in conjunction with the embodiments and drawings, but the embodiments of the application are not limited thereto.

[0031] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "back", "top", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is usually placed, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0032] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms "provided", "opened", "mounted", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0033] Example 1

[0034] In a first aspect, a cantilever formwork hoisting tool for double-curvature arch dam is provided, which comprises a bottom frame, a plurality of support rods, a plurality of sliding rods, a plurality of hanging holes, a plurality of connecting rods, a plurality of hinged rods, a plurality of sleeve rods, a plurality of driving rods, a plurality of motors, a plurality of support plates, a plurality of fixed plates, a plurality of fixed holes, a plurality of support rings, a plurality of synchronous belts, a plurality of fixed pulleys, a plurality of hanging rings, a plurality of connection ropes, a plurality of side plates, a plurality of cover plates, a plurality of lifting rings, a plurality of sliding grooves, a plurality of reinforcing ribs, a plurality of reinforcing straight rods and a plurality of reinforcing inclined rods. Figure 1As shown, it comprises a chassis 1, two inclined rods 2 for hanging the lifting device are arranged on the chassis 1, the inclined rod 2 comprises a support rod 3 fixedly connected to the chassis 1 and a sliding rod 4 sliding along the extension direction of the support rod 3, the sliding rod 4 is provided with a hanging hole 5 for hanging the lifting device, and all the sliding rods 4 are connected with a driving assembly for driving the sliding rods 4 to move forward and backward along the extension direction of the support rod 3. The lifting device can be any existing small lifting device with a hook, such as an electric hoist, a small crane, etc. The bottom surface of the chassis 1 is provided with a supporting leg or a locking type caster. When the lifting device on each sliding rod 4 respectively hangs one end of the cantilever formwork, the sliding rod 4 and the driving assembly can be used to drive one of the sliding rods 4 to move forward and the other to move backward, so that the distance between the two sliding rods 4 in the front-back direction is different, the cantilever formwork is horizontally inclined, and the requirement of the horizontal bending of the double-curvature arch dam can be met, without manual adjustment of the rotation angle by workers, with high safety and high precision; through the design of the number of sliding rods 4, two lifting devices can be hung, so that the large amplitude rotation of the cantilever formwork caused by a single lifting device can be lifted.

[0035] Specifically, as shown in the figure, Figure 1 The driving assembly comprises a connecting rod 6 connected between the two sliding rods 4, the connecting rod 6 comprises a hinged rod 7 hinged to the inclined rod 2 and a sleeve rod 8 coaxially sleeved with the hinged rod 7, the sleeve rod 8 is connected with a driving rod 9 on the side wall, the driving rod 9 is connected with a motor 10 through a synchronous belt 15, the two inclined rods 2 and the connecting rod 6 are located in the same plane, the driving rod 9 is arranged perpendicularly to the plane where the two inclined rods 2 are located, and the output shaft of the motor 10 is arranged in parallel with the driving rod 9. The rotating shaft on the hinged rod 7 is arranged in parallel with the driving rod 9. A cylindrical sleeve cavity is arranged in one end of the hinged rod 7 facing 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 sleeve cavity. Through the arrangement 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, the connecting rod 6 can retract the other sliding rod 4 while pushing out one of the sliding rods 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 changes when the sliding rod 4 moves forward and backward, the length of the connecting rod 6 on both sides of the driving rod 9 can change with the movement of the sliding rod 4 through the connecting relationship between the hinged rod 7 and the sleeve rod 8, so that the sliding rod 4 can move forward and backward smoothly.

[0036] Specifically, as shown in the figure, Figure 1As shown, a support plate 11 connects the two support rods 3. A fixing plate 12 for fixing the drive rod 9 is connected to the support plate 11. The fixing plate 12 is provided with a fixing hole 13 for the drive rod 9 to pass through. Its function is to fix the drive rod 9 radially through the fixing hole 13, ensuring that the drive rod 9 can rotate around its own axis within the fixing hole 13.

[0037] Specifically, such as Figure 1 As shown, the inner diameter of the fixing hole 13 is equal to the outer diameter of the drive rod 9. A support ring 14 for supporting the drive rod 9 on the top surface of the fixing plate 12 is connected to the drive rod 9. The outer diameter of the support ring 14 is larger than the outer diameter of the drive rod 9. The drive rod 9 is provided with a gear segment for meshing with the synchronous belt 15. The outer diameter of the gear segment is smaller than the inner diameter of the fixing hole 13. A gear for meshing with the synchronous belt 15 is connected to the output shaft of the motor 10 via a key. (Not shown in the figure) Its function is to fix the height of the drive rod 9 by setting the support ring 14, preventing the drive rod 9 from moving downward along its own axis; and to prevent the synchronous belt 15 from sliding along the axial direction of the drive rod 9 by the size design of the gear segment and the drive rod 9.

[0038] Specifically, such as Figure 2 As shown, the fixing plate 12 is disposed on the bottom surface of the support plate 11, and 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, and a connecting rope 18, which passes around the fixed pulley 16, connects the two hanging rings 17. The connecting rope 18 is made of steel wire rope. Its function is to connect the two sliding rods 4 through the fixed pulley 16 and the connecting rope 18, and, in conjunction with the fixed pulley 16 and the support rod 3, to limit the range of motion of the two sliding rods 4, thereby preventing the sliding rods 4 from falling off the support rod 3.

[0039] Specifically, such as Figure 1 As shown, the fixed pulley 16 includes an axle, a side plate 19 on the top surface of the support rod 3, and a cover plate 20 connected to the side plate 19 by bolts. Both the cover plate 20 and the support plate 11 have embedding grooves for embedding the end of the axle. The top end of the axle is located in the embedding groove on the cover plate 20, and the bottom end of the axle is located in the embedding groove on the support plate 11. The axle and the embedding groove are fitted with any existing anti-rotation structure, such as the section of the axle located in the embedding groove and the embedding groove being prismatic, or the axle and the embedding groove being connected by a key. Its function is that the cover plate 20 and the embedding groove can position the axle, thereby transmitting the force from the sliding rod 4 to the connecting rope 18 to the fixed pulley 16, and the axle and the embedding groove are subjected to force.

[0040] Specifically, such as Figure 1As shown, the support rod 3 is provided with a hanging ring 22 for hanging a fixing rope, which is used to be fixed on the top surface of the poured and solidified concrete. The fixing rope itself is a prior art, which is connected with the ground anchor on the concrete and will not be described here.

[0041] Specifically, as shown in the figure, Figure 1 As shown, the left and right sides of the support rod 3 are provided with sliding grooves 23, and the inner walls of the left and right sides of the sliding rod 4 are provided with sliding bars for embedding into the sliding grooves 23. Its function is to transmit part of the force received by the sliding rod 4 to the sliding groove 23 through the design of the sliding groove 23 on the left and right sides of the support rod 3, which plays a certain dispersing role on the stress of the sliding rod 4.

[0042] Specifically, as shown in the figure, Figure 1 As shown, the top of the sliding rod 4 is in the shape of a solid column, the bottom of the support rod 3 is not provided with a sliding groove 23, the top end of the sliding rod 4 is provided with a reinforcing rib 25, the hanging hole 5 is arranged on the reinforcing rib 25, the bottom end of the section of the sliding rod 4 provided with the sliding bar is open, the bottom end of the section of the support rod 3 provided with the sliding groove 23 is connected with the chassis 1 through a reinforcing straight rod 26, and the bottom end of the section of the support rod 3 not provided with the sliding groove 23 is connected with the chassis 1 through a reinforcing inclined rod 27. The reinforcing straight rod 26 is arranged vertically with the chassis 1, and the reinforcing inclined rod 27 is arranged obliquely with the chassis 1. Its function is that the setting of the reinforcing rib 25 can enhance the overall structural strength of the sliding rod 4, and the setting of the reinforcing straight rod 26 and the reinforcing inclined rod 27 can enhance the overall structural strength of the support rod 3.

[0043] In the second aspect, a cantilever formwork construction method for double-curvature arch dams is applied to the cantilever formwork hoisting tool for double-curvature arch dams, and includes the following steps:

[0044] Step S1, hanging the two hoisting devices on the hanging holes 5 on the two sliding rods 4 respectively;

[0045] Step S2, hanging the hooks of the two hoisting devices on the two lifting lugs of the cantilever formwork respectively;

[0046] Step S3, lifting the cantilever formwork;

[0047] Step S4, starting the driving assembly to drive one of the sliding rods 4 to move forward and the other one to move backward, adjusting the wire lengths of the two hoisting devices at the same time to make the two lifting lugs of the cantilever formwork at the same height, and adjusting the angle of the cantilever formwork to turn left or right according to the installation requirements of the cantilever formwork.

[0048] Further including the following steps:

[0049] Step S0, before step S1, first connecting the fixing rope with the hanging ring 22, and then connecting the fixing rope with the ground anchor on the solidified concrete to complete the fixation of the hoisting tool.

[0050] The working principle of the embodiment is explained as follows: when the hoisting devices on the two sliding rods 4 are all hung on different lifting lugs on the same cantilever formwork, the gravity of the cantilever formwork is transmitted to the sliding rods 4, the force of the sliding rods 4 is partially transmitted to the sliding grooves 23 and the other part is transmitted to the fixed pulleys 16, the force of the sliding grooves 23 and the fixed pulleys 16 is transmitted to the supporting rods 3, the force of the supporting rods 3 is partially transmitted to the chassis 1 and the other part is transmitted to the fixed ropes.

[0051] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. According to the technical essence of the present application, any simple modification, equivalent replacement and improvement of the above embodiment, and the like, all still belong to the protection scope of the technical scheme of the present application within the spirit and principles of the present application.

Claims

1. A cantilever formwork hoisting tool for double-curvature arch dams, characterized in that: The utility model provides a kind of double-curved arch dam construction device, including chassis (1), the chassis (1) is equipped with two inclined poles (2) for hanging lifting equipment, inclined pole (2) includes support rod (3) fixedly connected on chassis (1) and sliding rod (4) for sliding along the extension direction of support rod (3), sliding rod (4) is equipped with hanging hole (5) for hanging lifting equipment, all sliding rods (4) are connected with the drive assembly for driving sliding rod (4) moves back and forth along the extension direction of support rod (3). The drive assembly includes connecting rod (6) connected between two sliding rods (4), connecting rod (6) includes articulated rod (7) articulated on inclined pole (2) and sleeve rod (8) coaxially sleeved with articulated rod (7), drive rod (9) is connected on the side wall of sleeve rod (8), drive rod (9) is connected with motor (10) by synchronous belt (15), two inclined poles (2) are located in the same plane with connecting rod (6), drive rod (9) is vertically arranged with the plane where two inclined poles (2) are located, the output shaft of motor (10) is parallelly arranged with drive rod (9), after lifting equipment on each sliding rod (4) respectively hangs one end of cantilever formwork, sliding rod (4) and drive assembly can be respectively driven to move forward one of sliding rods (4) and move backward the other one, so that distance difference is generated in front and back direction of two sliding rods (4), so that cantilever formwork is horizontally inclined, so that the demand of double-curved arch dam horizontal bending can be met.

2. The cantilever formwork hoisting tooling for double-curvature arch dam according to claim 1, characterized in that: Two support rods (3) are connected with support plate (11), support plate (11) is connected with fixing plate (12) for fixing drive rod (9), fixing plate (12) is provided with fixing hole (13) for drive rod (9) to pass through.

3. The cantilever formwork hoisting tooling for double curvature arch dams according to claim 2, characterized in that: The inner diameter of fixing hole (13) is equal to the outer diameter of drive rod (9), support ring (14) is connected on the top surface of drive rod (9) for supporting, the outer diameter of support ring (14) is greater than the outer diameter of drive rod (9), gear segment is provided on drive rod (9) for engaging with synchronous belt (15), the outer diameter of gear segment is smaller than the inner diameter of fixing hole (13).

4. The cantilever formwork hoisting tooling for double-curvature arch dam according to claim 2, characterized in that: Fixing plate (12) is arranged on the bottom surface of support plate (11), at least one fixed pulley (16) is arranged on the top surface of support plate (11), hanging ring (17) is arranged on sliding rod (4), and connecting rope (18) is connected between two hanging rings (17) and passes through fixed pulley (16).

5. The cantilever formwork hoisting tooling for double curvature arch dams according to claim 4, characterized in that: The fixed pulley (16) includes an axle, a side plate (19) is arranged on the top surface of the support rod (3), a cover plate (20) is connected to the side plate (19) by bolts, and an embedding groove is arranged on the support plate (11) and the cover plate (20) for embedding the end of the axle.

6. The cantilever formwork hoisting tool for double-curvature arch dam according to claim 1, characterized in that: The support rod (3) is provided with a lifting ring (22) for hanging a fixing rope, and the fixing rope is used for fixing on the top surface of the solidified concrete.

7. The cantilever formwork hoisting tool for double-curvature arch dam according to claim 1, characterized in that: The left and right sides of the support rod (3) are provided with sliding grooves (23), and the inner walls of the sliding rods (4) are provided with sliding bars for embedding into the sliding grooves (23).

8. The cantilever formwork hoisting tooling for double curvature arch dams as claimed in claim 7 wherein: The top of the sliding rod (4) is in the shape of a solid column, the bottom of the support rod (3) is not provided with a sliding groove (23), the top end of the sliding rod (4) is provided with a reinforcing rib (25), the hanging hole (5) is arranged on the reinforcing rib (25), the section of the sliding rod (4) provided with the sliding bar is open at the bottom end, the section of the support rod (3) provided with the sliding groove (23) is connected with the chassis (1) through a reinforcing straight rod (26), the section of the support rod (3) not provided with the sliding groove (23) is connected with the chassis (1) through a reinforcing inclined rod (27), the reinforcing straight rod (26) is arranged vertically with the chassis (1), and the reinforcing inclined rod (27) is arranged obliquely with the chassis (1).

9. A method for cantilever formwork construction of a double curvature arch dam, characterized in that: The application is applied to the cantilever formwork hoisting tooling for double-curvature arch dams in any one of claims 1-8, and comprises the following steps: Step S1, hanging two hoisting devices on the hanging holes (5) on the two sliding rods (4) respectively; Step S2, hanging the hooks of the two hoisting devices on the two lifting lugs of the cantilever formwork respectively; Step S3, lifting the cantilever formwork; Step S4, starting the driving assembly, driving one of the sliding rods (4) to move forward, driving one of the sliding rods (4) to move backward, adjusting the wire length of the two hoisting devices at the same time, so that the two lifting lugs of the cantilever formwork are in the state of being at the same height, and adjusting the angle of the left turn or the right turn of the cantilever formwork according to the installation requirement of the cantilever formwork.

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