Vertical prestressed tendon anchoring conversion construction method

Abstract

The application discloses a vertical prestressed tendon anchoring conversion construction method, belongs to the technical field of prestressed tendon installation, and solves the problem that it is difficult to integrally pass a cable through a reserved hole channel with a small diameter at present. The method is that a cable is prepared by using a cable head device, and a whole cable body with a diameter smaller than that of the reserved hole channel is obtained; then the whole cable body is hoisted and passed through the reserved hole channel by using a hoisting device, the hoisting device is replaced as a temporary hoisting tool, an anchor plate is installed, and the whole cable body is hoisted again; finally, the anchor plate is lowered to the reserved hole channel, a working clamp is installed, and the anchoring conversion of the prestressed tendon is completed. The vertical prestressed tendon anchoring conversion construction method can meet the requirement of fast cable hanging of the small-diameter reserved hole channel, and effectively improves the construction efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prestressed tendon installation, more particularly, it relates to a vertical prestressed tendon anchoring conversion construction method. BACKGROUND

[0002] In recent years, with the continuous implementation of new energy development strategy, wind power projects are also being built on a large scale. For the hanging cable construction process of the vertical prestressed tendon of the reinforced tower cylinder, the industry is mostly the construction method of lifting the whole bundle. Its main procedures are: ① cutting and bundling the prestressed tendon to make a cable, ② installing an upper end anchor clamp as a cable head, ③ connecting the cable head with the lifting wire rope of the crane to lift the whole bundle of prestressed tendons through the upper end reserved hole, ④ installing a two-piece pad above the reserved hole to fix the cable head (anchor clamp), ⑤ removing the lifting connection device to complete the hanging cable.

[0003] However, with the optimization of the design of the main concrete structure, the diameter of the reserved hole tends to be as small as possible, and the diameter of the prestressed anchor clamp is much larger than that of the cable body, which causes the anchor clamp to be unable to pass through the reserved hole. The existing hanging cable process cannot meet the needs of small-diameter reserved holes. For small-diameter reserved holes, only the method of passing through the reserved hole by each steel strand can be used, but this method is low in efficiency for anchor cables with a large number of steel strands, which seriously affects the construction efficiency. Therefore, a vertical prestressed tendon anchoring conversion construction method is proposed. SUMMARY

[0004] The technical problem to be solved by the present application is to solve the above-mentioned deficiencies of the prior art. The purpose of the present application is to provide a vertical prestressed tendon anchoring conversion construction method which can meet the needs of fast hanging cable for small-diameter reserved holes and effectively improve the construction efficiency.

[0005] In order to achieve the above-mentioned purpose, the present application provides a vertical prestressed tendon anchoring conversion construction method. The method is to make a cable with a cable head device to obtain a whole bundle cable body with a diameter smaller than that of the reserved hole; then use a lifting device to lift the whole bundle cable body through the reserved hole, and then replace the lifting device as a temporary lifting tool to install an anchor plate and lift the whole bundle cable body again; finally, lower the anchor plate to the reserved hole opening and install a working clamp to complete the anchoring conversion of the prestressed tendon.

[0006] As a further improvement, the cable head device includes a connector A, a wire separation plate and a guide cap, wherein the diameter of the guide cap is smaller than that of the reserved hole. The lifting device includes a traction rope, a connector B and a lifting tool. The connector B is fixedly installed at one end of the traction rope. The construction method includes the following steps:

[0007] S1: cut the prestressed tendon, upset the head, and install the connector A, the wire separation plate and the guide cap respectively to obtain a whole bundle cable body;

[0008] S2: hoist the whole cable through the reserved hole with the lifting device, and place the cable head device above the reserved hole;

[0009] S3: temporarily support the cable head device, and remove the lifting device and the guide cap;

[0010] S4: fix the lifting tool above the reserved hole, hang the traction rope on the lifting tool, pass the traction rope through the anchor hole of the anchor plate one by one, connect the connector B with the connector A, complete the replacement of the lifting tool and the installation of the anchor plate;

[0011] S5: lift the whole cable again with the lifting tool, remove the temporary support of the cable head device and the wire separating plate;

[0012] S6: lower the anchor plate to the mouth of the reserved hole, install the work clamping piece, remove the connector B and the connector A, and complete the anchoring conversion of the prestressed tendon.

[0013] Further, the step S1 comprises the following specific steps:

[0014] S1.1: cut the wire of each prestressed tendon, and upset the head;

[0015] S1.2: install the prestressed tendon on the wire separating plate respectively, and place the center wire upset head above the wire separating plate;

[0016] S1.3: install the connector A on the center wire upset head above the wire separating plate one by one;

[0017] S1.4: sleeve the guide cap on the wire separating plate, so that the guide cap surrounds the connector A, the wire separating plate and the prestressed tendon, and obtain the whole cable.

[0018] Further, the circumference of the wire separating plate is provided with wire separating grooves consistent with the number of prestressed tendons, in the step S1.2, the center wire of the prestressed tendon is embedded into the wire separating groove from the outer circumference of the wire separating plate, one side of the connector A is provided with an upset groove, and in the step S1.3, the center wire of the prestressed tendon is embedded into the upset groove from one side of the connector A.

[0019] Further, the connector A comprises a core rod and a sleeve, wherein the upset groove is arranged at the lower part of the core rod, in the step S1.3, the center wire of the prestressed tendon is first passed through the sleeve, then embedded into the upset groove, and finally the sleeve is sleeved and fixed at the lower part of the core rod.

[0020] Further, the cable head device further comprises a universal lifting ring, and the step S1.4 further comprises the step of installing the universal lifting ring on the guide cap.

[0021] Further, the step S3 comprises the following specific steps:

[0022] S3.1: Install a temporary pad under the cable head device, and lower the whole cable body so that the gravity of the whole cable body is transferred to the temporary pad;

[0023] S3.2: Remove the hoisting device and the guide cap.

[0024] Further, the temporary pad is a half pad, and has a two-half structure.

[0025] Further, the lifting device further comprises a positioning plate and a rope clamp, wherein the positioning plate has a hole position consistent with the anchor hole of the anchor plate, and in step S4, before the anchor plate is installed, the traction ropes are threaded through the hole position of the positioning plate one by one, and the rope clamp is installed on each traction rope below the positioning plate.

[0026] Further, in step S4, the traction ropes are threaded after the anchor plate is temporarily fixed when the anchor plate is installed.

[0027] Advantages

[0028] Compared with the prior art, the present application has the following advantages:

[0029] 1. The vertical prestressed tendon anchoring conversion construction method adopts the cable head device to make the whole cable body with a diameter smaller than the diameter of the reserved hole, which can meet the rapid cable threading of the small-diameter reserved hole and effectively improve the construction efficiency; meanwhile, after the prestressed tendon is threaded through the reserved hole 1-1, the lifting device 1-T can be replaced as a temporary hoisting tool, and the hoisting device for cable threading can be transferred to the traction cable threading operation of the next prestressed tendon, so that the disassembly of the anchoring conversion device, the installation of the anchor plate and the traction cable threading of the prestressed tendon can be carried out at the same time, further improving the construction efficiency.

[0030] 2. The vertical prestressed tendon anchoring conversion construction method only operates on the end of the prestressed tendon during the whole anchoring conversion process, does not damage the outer sheath of other parts of the prestressed tendon, and ensures the durability of the prestressed tendon, so that the construction quality is good.

[0031] 3. The vertical prestressed tendon anchoring conversion device adopts the split wire plate to comb the prestressed tendon, facilitates the use of the connector A to anchor the single prestressed tendon, and then connects the guide cap and the split wire plate to wrap and combine all the prestressed tendons to realize the rapid production of the whole cable body; meanwhile, the split wire plate, the prestressed tendon, the connector A and the guide cap are detachable from each other, so that after the cable threading is completed, the anchoring conversion device can be directly disassembled from above the reserved hole, which can realize rapid disassembly and further improve the construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic view of the present application;

[0033] Figure 2 is a structure enlarged schematic view of the head device in the present application;

[0034] Figure 3 is a structure enlarged schematic view of the guide cap in the present application;

[0035] Figure 4 is a structure enlarged schematic view of the filament plate in the present application from the top;

[0036] Figure 5 is a structure enlarged schematic view of the connector A in the present application;

[0037] Figure 6 is a structure schematic view before threading the cable in the present application;

[0038] Figure 7 is a structure schematic view after threading the cable in the present application;

[0039] Figure 8 is a structure schematic view of replacing the lifting tool in the present application;

[0040] Figure 9 is a structure schematic view of lifting the prestressed tendon again in the present application;

[0041] Figure 10 is a structure schematic view below the anchor plate in the present application.

[0042] Wherein:

[0043] 1-S, head device;

[0044] 1-1, reserved hole; 1-2, prestressed tendon; 1-3, filament plate; 1-4, guide cap; 1-5, connector A; 1-6, universal lifting ring; 1-3-1, filament groove; 1-5-1, upsetting groove; 1-5a, core rod; 1-5b, sleeve;

[0045] 1-T, lifting device;

[0046] 1-7, connector B; 1-8, anchor plate; 1-9, rope clamp; 1-10, positioning plate; 1-11, traction rope; 1-12, lifting tool;

[0047] 1-H, temporary backing plate. DETAILED DESCRIPTION

[0048] The present application will be further described below in conjunction with specific embodiments in the accompanying drawings.

[0049] Reference Figures 1-10The application discloses a vertical prestressed tendon anchoring conversion construction method, which comprises the following steps: first, a cable head device 1-S is used to make a cable, and a whole cable body with a diameter smaller than that of a reserved hole 1-1 is obtained; then, the whole cable body is hoisted through the reserved hole 1-1 by using a hoisting device; a lifting device 1-T is replaced as a temporary hoisting tool; the whole cable body is lifted again; finally, the anchoring conversion is completed by lowering the anchoring plate 1-8 to the reserved hole 1-1 and installing a working clamp.

[0050] The vertical prestressed tendon anchoring conversion construction method of the application can meet the requirement of fast cable passing through the small-diameter reserved hole and effectively improve the construction efficiency.

[0051] Preferably, the cable head device 1-S comprises a filament separating plate 1-3, a connector A1-5 and a guide cap 1-4, the filament separating plate 1-3 is provided with filament separating grooves 1-3-1 corresponding to the number of the prestressed tendons 1-2, the width of the filament separating grooves 1-3-1 is smaller than the diameter of the connector A1-5, so that the connector A1-5 can be clamped on the filament separating plate 1-3 and cannot fall off, the outer wall of the filament separating plate 1-3 is further provided with external threads, which facilitates the threaded connection with the guide cap 1-4, the connector A1-5 is provided with a upsetting groove 1-5-1 for installing the prestressed tendon 1-2, the connector A1-5 is located above the filament separating plate 1-3, the diameter of the guide cap 1-4 is smaller than that of the reserved hole 1-1, the lower end of the guide cap 1-4 is provided with internal threads and is connected with the external threads of the filament separating plate 1-3, the guide cap 1-4 is detachably sleeved on the filament separating plate 1-3, so that the guide cap 1-4 surrounds the connector A1-5, the filament separating plate 1-3 and the prestressed tendon 1-2 and is used for restraining the connector A1-5 and preventing the center wire of the prestressed tendon 1-2 from falling out, thereby obtaining the whole cable body with a diameter smaller than that of the reserved hole 1-1.

[0052] The vertical prestressed tendon anchoring conversion device of the application adopts the split wire plate 1-3 to comb the prestressed tendon 1-2, facilitates the use of the connector A1-5 to anchor the prestressed tendon 1-2 single root, and then connects the guide cap 1-4 with the split wire plate 1-3 to wrap and combine all the prestressed tendons 1-2, so that the whole bundle of tendon bodies with a diameter smaller than that of the reserved hole 1-1 can be obtained, which can meet the requirements of fast tendon penetration of small-diameter reserved holes and effectively improve the construction efficiency; meanwhile, the split wire plate 1-3, the prestressed tendon 1-2, the connector A1-5 and the guide cap 1-4 can be detachably connected with each other, so that the anchoring conversion device can be directly detached from the reserved hole 1-1 after the tendon penetration is completed, which can realize quick disassembly and further improve the construction efficiency.

[0053] Preferably, the split wire plate 1-3 is made of steel material, the split wire grooves 1-3-1 are uniformly distributed on the circumferential edge of the split wire plate 1-3, and the split wire grooves 1-3-1 are arranged in a radially concave manner along the circumferential edge of the split wire plate 1-3, the width of the split wire groove 1-3-1 is greater than the diameter of the center wire of the prestressed tendon 1-2 and smaller than the diameter of the upsetting head, so that the center wire of the prestressed tendon 1-2 can be embedded into the split wire groove 1-3-1 from one side of the split wire plate 1-3, facilitating the disassembly of the prestressed tendon 1-2, and the prestressed tendon 1-2 will not be vertically separated from the split wire plate 1-3, further improving the lifting safety. The upsetting head groove 1-5-1 is arranged in a radially concave manner along the outer wall of the connector A1-5, facilitating the embedding of the center wire upsetting head of the prestressed tendon 1-2 from one side of the connector A1-5, and facilitating the disassembly of the connector A1-5.

[0054] The vertical prestressed tendon anchoring conversion device of the application only operates on the end part of the prestressed tendon 1-2 during the whole anchoring conversion process, without damaging the outer sheath of other parts of the prestressed tendon, ensuring the durability of the prestressed tendon and good construction quality.

[0055] Preferably, the cable head device 1-S further comprises a universal lifting ring 1-6, which can be a mature product on the market and can rotate by 360° to release the torsional force in the lifting process, and the universal lifting ring 1-6 is detachably installed on the top of the guide cap 1-4, specifically, the universal lifting ring 1-6 is connected with the guide cap 1-4 through threads to realize quick disassembly of the universal lifting ring 1-6. In other embodiments, the universal lifting ring 1-6 and the guide cap 1-4 can also be connected by bolts.

[0056] Preferably, the temporary backing plate 1-H is made of steel, the temporary backing plate 1-H is a half backing plate, and one side of the temporary backing plate 1-H is provided with a groove matching the diameter of the guide cap 1-4 for limiting the position of the cable head device, and the other side of the temporary backing plate 1-H is provided with a boss matching the diameter of the reserved hole 1-1 for clamping into the reserved hole 1-1 for positioning, thereby improving the stability of the temporary support of the whole cable body. A through hole is arranged in the middle of the temporary backing plate 1-H for passing the prestressed beam. Further, the temporary backing plate 1-H is a two-piece structure for easy disassembly.

[0057] Preferably, the connector A1-5 is made of steel, the connector A1-5 includes a core rod 1-5a and a sleeve 1-5b, wherein a upsetting groove 1-5-1 is arranged at the lower part of the core rod 1-5a, and the sleeve 1-5b is detachably sleeved on the lower part of the core rod 1-5a to prevent the center wire from coming out. The sleeve 1-5b and the core rod 1-5a are threadedly connected, and in other embodiments, they can also be bolted.

[0058] Preferably, the anchoring conversion device further includes a lifting device 1-T as a temporary lifting tool instead of the hoisting device. The lifting device 1-T includes a traction rope 1-11, a connector B1-7 and a lifting tool 1-12, wherein the lifting tool 1-12 is a chain hoist, and can also be a hoist or other lifting equipment. The traction rope 1-11 is a conventional galvanized steel wire rope, which is hung on the lifting tool 1-12. The connector B1-7 is made of steel, one end of which is an extruded sleeve structure. After the traction rope 1-11 is inserted into the extruded sleeve, the connector B1-7 is fixedly installed at the bottom of the traction rope 1-11 by extrusion. The connector B1-7 is detachably connected with the connector A1-5, and the lifting device 1-T is detachably connected with the connector A1-5, so as to realize the replacement of the lifting tool. Specifically, the connector B1-7 and the connector A1-5 are connected by threads.

[0059] Preferably, the lifting device further includes a positioning plate 1-10 and a rope clamp 1-9, wherein the positioning plate 1-10 is made of steel plate, and the positioning plate 1-10 is provided with a hole position matching the anchor hole of the anchor plate 1-8. When the traction rope 1-11 passes through the positioning plate 1-10, the traction rope 1-11 is used to constrain the horizontal position of the whole traction rope 1-11. The rope clamp 1-9 matches the traction rope 1-11 to fix the vertical position of the positioning plate 1-10.

[0060] Preferably, the guide cap 1-4 is made of steel, and the top of the guide cap 1-4 is conical in shape to facilitate guiding the prestressed beam to pass through the reserved hole 1-1.

[0061] The vertical prestressed tendon anchoring conversion construction method comprises the following steps:

[0062] S1: cutting, heading, and respectively installing connector A1-5, filament plate 1-3, and guide cap 1-4 on prestressed tendon 1-2 to obtain a whole bundle of cable body;

[0063] S2: hoisting the whole bundle of cable body through the reserved hole 1-1 by using a hoisting device, and placing the cable head device 1-S above the reserved hole 1-1;

[0064] S3: temporarily supporting the cable head device 1-S, and removing the hoisting device and the guide cap 1-4;

[0065] S4: fixing the lifting tool 1-12 above the reserved hole 1-1, hanging the traction rope 1-11 on the lifting tool 1-12, then threading the traction rope 1-11 through the anchor holes of the anchor plate 1-8 one by one, and connecting the connector B1-7 with the connector A1-5, to complete the replacement of the hoisting tool and the installation of the anchor plate 1-8;

[0066] S5: lifting the whole bundle of cable body again by using the lifting tool 1-12, and removing the temporary support of the cable head device 1-S and the filament plate 1-3;

[0067] S6: lowering the anchor plate 1-8 to the mouth of the reserved hole 1-1, installing the working clamping piece, removing the connector B1-7 and the connector A1-5, and completing the anchoring conversion of the prestressed tendon.

[0068] The above step S1 comprises the following specific steps:

[0069] S1.1: cutting and heading each prestressed tendon 1-2;

[0070] S1.2: respectively installing the prestressed tendons 1-3 on the filament plate 1-3, so that the center wire head is arranged above the filament plate 1-3;

[0071] S1.3: installing the connector A1-5 on the center wire head above the filament plate 1-3 one by one;

[0072] S1.4: sleeving the guide cap 1-4 on the filament plate 1-3, so that the guide cap 1-4 surrounds the connector A1-5, the filament plate 1-3, and the prestressed tendon 1-2, to obtain a whole bundle of cable body.

[0073] In the above step S1.2, the center wire of the prestressed tendon 1-2 is embedded into the filament slot 1-3-1 from the outer circumferential edge of the filament plate 1-3. In the above step S1.3, the center wire of the prestressed tendon 1-2 is embedded into the head slot 1-5-1 from one side of the connector A1-5. This facilitates the disassembly of the filament plate 1-3 and the connector A1-5.

[0074] In the step S1.3, the center wire of the prestressed tendon 1-2 is first threaded through the sleeve 1-5b, then embedded into the upsetting groove 1-5-1, and finally the sleeve 1-5b is sleeved and fixed at the lower part of the core rod 1-5a. This plays a role in restraining the prestressed tendon 1-2 and improving the safety of hoisting.

[0075] In the step S1.4, the step of installing the universal lifting ring 1-6 on the guide cap 1-4 is further included, so as to realize the connection between the hoisting device and the cable head device 1-S.

[0076] The step S3 includes the following specific steps:

[0077] S3.1: A temporary pad 1-H is installed below the cable head device 1-S, and the whole cable body is lowered, so that the gravity of the whole cable body is transferred to the temporary pad 1-H.

[0078] S3.2: The hoisting device and the guide cap 1-4 are removed.

[0079] In the step S4, before the anchor plate 1-8 is installed, the traction ropes 1-11 are threaded through the hole positions of the positioning plate 1-10 one by one, and the rope clamps 1-9 are installed on each traction rope 1-11 below the positioning plate 1-10.

[0080] In the step S4, when the anchor plate 1-8 is installed, the anchor plate 1-8 is temporarily fixed, and then the traction ropes 1-11 are threaded. Specifically, a support frame with a hole in the middle can be erected on the concrete outside the reserved hole 1-1, and then the anchor plate 1-8 is placed on the support frame, which facilitates the threading of the traction ropes.

[0081] Comparison table of effects before and after using the conversion device

[0082]

[0083] From the above comparison table of effects, it can be concluded that using the anchoring conversion device to thread the prestressed bundle can not only greatly improve the construction efficiency, but also effectively reduce the construction cost and ensure the structural strength of the reserved hole.

[0084] The above is only a preferred embodiment of the present application, and it should be noted that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which will not affect the effect of the implementation of the present application and the practicality of the patent.

Claims

1. A construction method for anchoring and converting vertical prestressed tendons, characterized in that, The method involves first using a cable head device (1-S) to create a cable bundle with a diameter smaller than that of the pre-reserved duct (1-1); then using a hoisting device to lift the entire cable bundle through the pre-reserved duct (1-1); next, replacing the hoisting device (1-T) with a temporary hoisting tool, while the hoisting device used for cable threading is transferred to the next prestressed tendon traction cable threading operation, installing the anchor plate (1-8), and lifting the entire cable bundle again; finally, lowering the anchor plate (1-8) to the opening of the pre-reserved duct (1-1), installing the working clamps, and completing the prestressing process. The anchorage conversion of the stress tendon, the cable head device (1-S) includes connector A (1-5), wire splitter (1-3), and guide cap (1-4), wherein the diameter of guide cap (1-4) is smaller than the diameter of the reserved channel (1-1), the lifting device (1-T) includes traction rope (1-11), connector B (1-7), and lifting tool (1-12), wherein connector B (1-7) is fixedly installed at one end of traction rope (1-11), and the construction method includes the following steps: S1: Cut the prestressed tendon (1-2) into wires, upset the ends, and install connector A (1-5), wire splitter (1-3), and guide cap (1-4) respectively to obtain the entire cable bundle; S2: Use a hoisting device to lift the entire cable bundle through the reserved channel (1-1), so that the cable head device (1-S) is positioned above the reserved channel (1-1); S3: Provide temporary support for the cable head device (1-S), and remove the hoisting device and guide cap (1-4). S4: Fix the lifting tool (1-12) above the reserved channel (1-1), and hang the traction rope (1-11) on the lifting tool (1-12). Then, pass the traction rope (1-11) through the anchor hole of the anchor plate (1-8) one by one, and connect the connector B (1-7) to the connector A (1-5) to complete the replacement of the lifting tool and the installation of the anchor plate (1-8). S5: Use lifting tools (1-12) to lift the entire cable bundle again, and release the temporary support of the cable head device (1-S) and the wire splitting plate (1-3). S6: Lower the anchor plate (1-8) to the reserved duct (1-1), install the working clamp, release connector B (1-7) and connector A (1-5) to complete the anchorage conversion of the prestressed tendon; Step S1 includes the following specific steps: S1.1: Cut each prestressed tendon (1-2) into wires and upset its head; S1.2: Install the prestressed tendons (1-2) on the wire splitting plate (1-3) respectively, so that the center wire upset head is placed above the wire splitting plate (1-3); S1.3: Install connectors A (1-5) one by one on the center wire upsetting head above the wire splitter plate (1-3); S1.4: Fit the guide cap (1-4) onto the wire splitting plate (1-3) so that the guide cap (1-4) surrounds the connector A (1-5), the wire splitting plate (1-3) and the prestressing tendon (1-2) to obtain the entire cable bundle; The connector A (1-5) has a upset head groove (1-5-1) on one side. The connector A (1-5) includes a core rod (1-5a) and a sleeve (1-5b). The upset head groove (1-5-1) is located at the lower part of the core rod (1-5a). In step S1.3, the center wire of the prestressing tendon (1-2) first passes through the sleeve (1-5b) and then is embedded into the upset head groove (1-5-1). Finally, the sleeve (1-5b) is fitted and fixed to the lower part of the core rod (1-5a). The cable head device (1-S) further includes a universal lifting ring (1-6), and step S1.4 further includes the step of installing the universal lifting ring (1-6) on the guide cap (1-4).

2. The construction method for anchorage conversion of vertical prestressed tendons according to claim 1, characterized in that, The circumference of the wire-splitting plate (1-3) is provided with a wire-splitting groove (1-3-1) with the same number of prestressing tendons (1-2). In step S1.2, the center wire of the prestressing tendon (1-2) is inserted from the outer circumference of the wire-splitting plate (1-3) into the wire-splitting groove (1-3-1). In step S1.3, the center wire of the prestressing tendon (1-2) is inserted from one side of the connector A (1-5) into the upsetting groove (1-5-1).

3. The construction method for anchorage conversion of vertical prestressed tendons according to claim 1, characterized in that, Step S3 includes the following specific steps: S3.1: Install a temporary pad (1-H) below the cable head device (1-S), and lower the entire cable bundle so that the weight of the entire cable bundle is transferred to the temporary pad (1-H). S3.2: Remove the hoisting device and guide cap (1-4).

4. The construction method for anchorage conversion of vertical prestressed tendons according to claim 3, characterized in that, The temporary pad (1-H) is a Haval pad and has a two-half structure.

5. A construction method for anchoring and converting vertical prestressed tendons according to any one of claims 1-4, characterized in that, The lifting device (1-T) further includes a positioning plate (1-10) and a rope clamp (1-9). The positioning plate (1-10) has holes that correspond to the anchor holes of the anchor plate (1-8). In step S4, before installing the anchor plate (1-8), the traction ropes (1-11) are passed through the holes of the positioning plate (1-10) one by one, and a rope clamp (1-9) is installed on each traction rope (1-11) below the positioning plate (1-10).

6. The construction method for anchorage conversion of vertical prestressed tendons according to claim 5, characterized in that, In step S4, when installing the anchor plate (1-8), the anchor plate (1-8) is temporarily fixed before the traction rope (1-11) is threaded through it.

Images