Method for penetrating super-long steel strands in corrugated steel web segment beam body

Abstract

The invention provides a strand pulling method for an ultra-long steel strand in a corrugated steel web segment beam body, which comprises the following steps of: moving a steel wire rope pulling cable, and enabling one end of the steel wire rope pulling cable to penetrate into a corrugated pipe from one end of the corrugated pipe and penetrate out of the corrugated pipe from the other end of the corrugated pipe; by reversely moving the steel wire rope traction cable, the two ends of the steel wire rope traction cable are located on the outer side of the corrugated pipe, and the other end of the steel wire rope traction cable is connected with one end of the steel strand; and one end of the steel strand penetrates into the corrugated pipe from the other end of the corrugated pipe and penetrates out of one end of the corrugated pipe by moving the steel cable traction rope, so that the two ends of the steel strand are located on the outer sides of the corrugated pipe respectively. Compared with the mode that a steel cable traction rope penetrates into the corrugated pipe, the mode that the steel cable traction rope penetrates into the corrugated pipe through manpower or a strand pulling machine is more time-saving and labor-saving, the operation difficulty is effectively reduced, and the strand pulling work efficiency of the ultra-long prestress overall steel strand is improved. Due to the fact that the tensile strength of the steel cable traction rope is large, the steel cable traction rope is used for traction of large-length steel strands, and large-size steel strands are more reliable.

Description

Technical Field

[0001] The invention belongs to the field of post-tensioning prestressed steel strand bundle threading construction, and relates to a bundle threading method for super-long steel strands after the segment beam has completed the suspension assembly work. This method is suitable for the bundle threading construction of 500m steel strands. Background Art

[0002] With the rapid development of my country's economy, various economic construction projects and infrastructure projects have become increasingly inseparable. Various types of bridges have emerged one after another, and prestressed bridges have become one of the mainstream. At present, bridge erection mostly adopts prefabricated segmental beam hoisting construction, and the segmental beam hanging length is gradually increasing. At present, the prefabricated assembly length has exceeded 100 meters, so the threading of prestressed steel strands has become a problem.

[0003] At present, there are two methods for stranding steel strands: overall stranding and single strand stranding. Single strand stranding is time-consuming and labor-intensive for ultra-long prestressing, and it is easy to get tangled during the stranding process, which hinders the stranding and affects the tensioning quality. The overall stranding process is heavy, long, and requires manual insertion, which is difficult to operate and lacks operating space. Summary of the invention

[0004] In view of the problem of threading bundles of extra-long steel strands in corrugated steel web segment beams, the present invention provides a method for threading bundles of extra-long steel strands in corrugated steel web segment beams, which can simplify the threading construction of extra-long steel strands, reduce the difficulty of the threading construction of extra-long steel strands, shorten the time, reduce manpower consumption, and improve the efficiency of the threading work of extra-long prestressed steel strands.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A method for threading an extra-long steel strand in a corrugated steel web segment beam comprises the following steps:

[0007] Step 1, by moving the wire rope traction rope, one end of the wire rope traction rope is passed through the corrugated pipe from one end of the corrugated pipe and passed out from the other end of the corrugated pipe;

[0008] Step 2, connecting one end of the steel wire rope traction rope with one end of the steel cable traction rope;

[0009] Step 3, by moving the steel wire rope traction rope in the opposite direction, one end of the steel wire rope traction rope is passed into the corrugated tube from the other end of the corrugated tube and passed out from one end of the corrugated tube, so that the two ends of the steel wire rope traction rope are respectively located outside the corrugated tube, and the other end of the steel wire rope traction rope is connected to one end of the steel strand;

[0010] Step 4, by moving the steel cable traction rope, one end of the steel strand is passed into the corrugated tube from the other end of the corrugated tube and passed out from one end of the corrugated tube, so that the two ends of the steel strand are respectively located on the outside of the corrugated tube.

[0011] Preferably, in the above-mentioned method for bundling extra-long steel strands in a corrugated steel web segment beam, in step 1, the wire rope traction rope is moved by a bundling machine, and one end of the wire rope traction rope is passed into the corrugated tube from one end of the corrugated tube and out from the other end of the corrugated tube.

[0012] Preferably, in the above-mentioned method for threading bundles of extra-long steel strands in a corrugated steel web segment beam, in step 3, the wire rope traction rope is moved in reverse by a threading machine, and one end of the wire rope traction rope is passed into the corrugated tube from the other end of the corrugated tube and out from one end of the corrugated tube.

[0013] Preferably, in the above-mentioned method for threading bundles of extra-long steel strands in a corrugated steel web segment beam, in step 4, the steel cable traction rope is moved by a winch to pass one end of the steel strand into the corrugated tube from the other end of the corrugated tube and out from one end of the corrugated tube, so that the two ends of the steel strand are respectively located on the outside of the corrugated tube.

[0014] Preferably, in the above-mentioned method for threading bundles of super-long steel strands in a corrugated steel web segment beam, the steel wire rope traction rope comprises a steel wire rope and a steel wire rope spring buckle for connecting the steel cable traction rope, and the steel wire rope spring buckle is connected to the end of the steel wire rope by welding.

[0015] Preferably, in the above-mentioned method for threading extra-long steel strands in a corrugated steel web segment beam, one end of the steel strand is provided with a guide cap for connecting a steel cable traction rope, and the steel cable traction rope is a steel cable with rope buckles installed at both ends, one of which is connected to a spring buckle of the wire rope, and the other is connected to the guide cap.

[0016] Preferably, in the above-mentioned method for threading extra-long steel strands in a corrugated steel web segment beam, the guide cap comprises a guide cap body and a guide cap spring buckle, one end of the guide cap body is provided with a groove for accommodating and fixing the end of the steel strand, the other end of the guide cap body is fixedly connected to the guide cap spring buckle, and the other rope buckle is connected to the guide cap spring buckle.

[0017] Preferably, in the above-mentioned method for threading bundles of super-long steel strands in a corrugated steel web segment beam, when the corrugated tube is located in a suspended position, a bogie is used to cooperate with the threading work.

[0018] Preferably, in the above-mentioned method for threading bundles of super-long steel strands in a corrugated steel web segment beam, the threading machine is fixed to the bridge deck by means of erecting a support, planting reinforcement, and connecting the bridge deck fixed structure.

[0019] Preferably, in the above-mentioned method for threading bundles of super-long steel strands in a corrugated steel web segment beam, the winch is fixed to the bridge deck by means of erecting a support, planting reinforcement, and connecting the bridge deck fixed structure.

[0020] It can be seen from the technical solutions disclosed above that, compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The present invention provides a method for threading bundles of super-long steel strands in a corrugated steel web segment beam. The method comprises the following steps: moving a steel wire rope traction rope, inserting one end of the steel wire rope traction rope into a corrugated tube from one end of the corrugated tube and passing it out from the other end of the corrugated tube; connecting one end of the steel wire rope traction rope with one end of a steel cable traction rope; moving the steel wire rope traction rope in the opposite direction, inserting one end of the steel cable traction rope into the corrugated tube from the other end of the corrugated tube and passing it out from one end of the corrugated tube, so that the two ends of the steel cable traction rope are respectively located on the outside of the corrugated tube, and connecting the other end of the steel cable traction rope with one end of the steel strand; and moving the steel cable traction rope, inserting one end of the steel strand into the corrugated tube from the other end of the corrugated tube and passing it out from one end of the corrugated tube, so that the two ends of the steel strand are respectively located on the outside of the corrugated tube. On the one hand, since the steel wire rope is lighter than the steel cable, it is more time-saving and labor-saving to insert the steel wire rope into the corrugated tube manually or by a bundle threading machine, which effectively reduces the difficulty of operation, shortens the time, reduces manpower consumption, and improves the efficiency of the overall bundle threading of super-long prestressed steel strands. On the other hand, since the tensile strength of the steel cable is greater than that of the steel wire rope, it is more reliable to use the steel cable to pull long and large steel strands, which improves the stability and efficiency of the overall bundle threading of super-long prestressed steel strands. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of step 1 of a method for threading bundles of super-long steel strands in a corrugated steel web segment beam of the present invention.

[0023] Figure 2 It is a structural schematic diagram of step 3 of a method for bundling super-long steel strands in a corrugated steel web segment beam of the present invention.

[0024] Figure 3 The present invention is a schematic structural diagram of a steel wire rope traction cable for a method of threading bundles of super-long steel strands in a corrugated steel web segment beam.

[0025] Figure 4 The present invention is a schematic structural diagram of a steel cable traction rope for a method of threading bundles of super-long steel strands in a corrugated steel web segment beam.

[0026] Figure 5 It is a structural schematic diagram of a guide cap for a method for threading bundles of super-long steel strands in a corrugated steel web segment beam according to the present invention.

[0027] Figure 6 This is a structural schematic diagram of step 4 of a method for threading bundles of super-long steel strands in a corrugated steel web segment beam of the present invention.

[0028] Figure 7 for Figure 6 A magnified schematic diagram of part A.

[0029] In the figure: 1—wire rope traction rope, 1-1—wire rope, 1-2—wire rope spring buckle, 2—cable traction rope, 2-1—steel cable, 2-2—rope buckle, 3—corrugated pipe, 4—steel strand, 5—guide cap, 5-1—guide cap body, 5-2—guide cap spring buckle, 6—corrugated steel web segment beam, 7—winch. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The technical content and features of the present invention will be described in detail below by combining the enumerated embodiments with the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. For the convenience of description, the "upper" and "lower" described below are consistent with the upper and lower directions of the accompanying drawings, but this cannot be a limitation of the technical solution of the present invention.

[0031] See also Figures 1 to 7 This embodiment discloses a method for threading an ultra-long steel strand in a corrugated steel web segment beam, comprising the following steps:

[0032] Step 1, by moving the steel wire rope traction rope 1, one end of the steel wire rope traction rope 1 is passed through the corrugated tube 3 from one end of the corrugated tube 3, and passed out from the other end of the corrugated tube 3, wherein the corrugated tube 3 is pre-buried in the corrugated steel web segment beam body 6;

[0033] Step 2, connecting one end of the steel wire rope traction rope 1 with one end of the steel cable traction rope 2;

[0034] Step 3, by moving the steel wire rope traction rope 1 in the reverse direction, one end of the steel cable traction rope 2 is passed through the corrugated tube 3 from the other end of the corrugated tube 3 and passed through one end of the corrugated tube 3, so that the two ends of the steel cable traction rope 2 are respectively located outside the corrugated tube 3, and the other end of the steel cable traction rope 2 is connected to one end of the steel strand 4;

[0035] Step 4, by moving the steel cable traction rope 2, one end of the steel strand 4 is passed through the corrugated tube 3 from the other end of the corrugated tube 3 and passed out from one end of the corrugated tube 3, so that the two ends of the steel strand 4 are respectively located on the outside of the corrugated tube 3, as shown in FIG. Figure 6 and Figure 7 shown.

[0036] The present invention provides a method for threading a bundle of super-long steel strands in a corrugated steel web segment beam. The method comprises the following steps: moving a steel wire rope traction rope 1, inserting one end of the steel wire rope traction rope 1 into the corrugated tube 3 from one end of a corrugated tube 3, and passing the bundle out from the other end of the corrugated tube 3; connecting one end of the steel wire rope traction rope 1 to one end of a steel cable traction rope 2; moving the steel wire rope traction rope 1 in the opposite direction, inserting one end of the steel cable traction rope 2 into the corrugated tube 3 from the other end of the corrugated tube 3 and passing the bundle out from one end of the corrugated tube 3, so that the two ends of the steel cable traction rope 2 are respectively located on the outside of the corrugated tube 3, and connecting the other end of the steel cable traction rope 2 to one end of a steel strand 4; moving the steel cable traction rope 2, inserting one end of the steel strand 4 into the corrugated tube 3 from the other end of the corrugated tube 3 and passing the bundle out from one end of the corrugated tube 3, so that the two ends of the steel strand 4 are respectively located on the outside of the corrugated tube 3. On the one hand, since the steel wire rope traction rope 1 is lighter than the steel cable traction rope 2, using a bundle threading machine to thread the steel wire rope traction rope 1 into the corrugated tube 3 is more time-saving and labor-saving than threading the steel cable traction rope 2 into the corrugated tube 3, which effectively reduces the difficulty of operation and improves the efficiency of the bundle threading of the super-long prestressed steel strands 4. On the other hand, since the steel cable traction rope 2 has a greater tensile strength than the steel wire rope traction rope 1, it is more reliable to use the steel cable traction rope 2 to pull the long-length and large-volume steel strands 4, which improves the stability and efficiency of the bundle threading of the super-long prestressed steel strands 4. Therefore, the super-long steel strand threading method in the corrugated steel web segment beam body provided by the present invention can simplify the super-long steel strand threading construction, shorten the time, reduce manpower consumption, and efficiently complete the overall bundle threading of the super-long prestressed steel strands.

[0037] Preferably, in the above-mentioned method for bundling super-long steel strands in the corrugated steel web segment beam, in step 1, the steel wire rope traction rope 1 is moved by a bundling machine (not shown), and one end of the steel wire rope traction rope 1 is inserted into the corrugated tube from one end of the corrugated tube 3 and is passed out from the other end of the corrugated tube. The use of a bundling machine can simplify the bundling construction of super-long steel strands, shorten the time, reduce manpower consumption, and further improve the efficient overall bundling work of super-long prestressed steel strands.

[0038] Preferably, in the above-mentioned method for bundling super-long steel strands in the corrugated steel web segment beam, in step 3, the steel wire rope traction rope 1 is moved in the opposite direction by a bundling machine, and one end of the steel wire rope traction rope 1 is inserted into the corrugated pipe 3 from the other end of the corrugated pipe 3 and passed out from one end of the corrugated pipe 3. The use of a bundling machine can simplify the overall bundling construction of super-long steel strands, shorten the time, reduce manpower consumption, and further improve the efficient overall bundling work of super-long prestressed steel strands.

[0039] Preferably, in the above-mentioned method for threading bundles of super-long steel strands in a corrugated steel web segment beam, in step 4, the steel cable traction rope 2 is moved by a winch 7, and one end of the steel strand 4 is passed into the corrugated tube 3 from the other end of the corrugated tube 3 and passed out from one end of the corrugated tube 3, so that the two ends of the steel strand 4 are respectively located on the outside of the corrugated tube 3. Since the tensile strength of the steel cable traction rope 2 is greater than that of the steel wire rope traction rope 1, it is more reliable to use the steel cable traction rope 2 to pull the long-length and large-volume steel strand 4. The use of a winch can simplify the threading construction of super-long steel strands, shorten the time, reduce manpower consumption, and further improve the efficient overall threading of super-long prestressed steel strands.

[0040] Preferably, in the above-mentioned method for threading bundles of extra-long steel strands in a corrugated steel web segment beam, the steel wire rope traction rope 1 includes a steel wire rope 1-1 and a steel wire rope spring buckle 1-2 for connecting a steel cable traction rope 2, and the steel wire rope spring buckle 1-2 is connected to the end of the steel wire rope 1-1 by welding. The welding connection method can prevent the steel wire rope spring buckle 1-2 from being stuck in the groove of the corrugated tube 3 due to turning during the threading process, and the steel wire rope spring buckle 1-2 is used to connect the steel cable traction rope 2.

[0041] Preferably, in the above-mentioned method for threading bundles of super-long steel strands in a corrugated steel web segment beam, one end of the steel strand 4 is provided with a guide cap 5 for connecting to a steel cable traction rope 2, and the steel cable traction rope 2 is a steel cable 2-1 with rope buckles 2-2 respectively installed at both ends, one of which is connected to a steel wire rope spring buckle 1-2, and the other is connected to the guide cap 5. The steel cable traction rope 2 has a greater tensile strength than the steel wire rope traction rope 1, and is more reliable in traction of a long-length and large-volume steel strand 4.

[0042] Preferably, in the above-mentioned method for threading extra-long steel strands in the corrugated steel web segment beam, the guide cap 5 includes a guide cap body 5-1 and a guide cap spring buckle 5-2, one end of the guide cap body 5-1 is provided with a groove for accommodating and fixing the end of the steel strand 4, the other end of the guide cap body 5-1 is fixedly connected to the guide cap spring buckle 5-2, and the other rope buckle 2-2 is connected to the guide cap spring buckle 5-2.

[0043] Preferably, in the above-mentioned method for threading the bundle of extra-long steel strands in the corrugated steel web segment beam, when the corrugated tube 3 is in a suspended position, a bogie is used to cooperate with the threading work, which can ensure the horizontality of the corrugated tube 3 and is conducive to the smooth threading construction of the extra-long steel strands 4.

[0044] Preferably, in the above-mentioned method for threading bundles of extra-long steel strands in a corrugated steel web segment beam, the bundle threading machine is fixed to the bridge deck by means of erecting a support, planting reinforcement, and connecting the bridge deck fixed structure, thereby stably fixing the bundle threading machine on the bridge deck, which is beneficial to the bundle threading construction of the extra-long steel strands 4.

[0045] Preferably, in the above-mentioned method for threading the bundle of extra-long steel strands in the corrugated steel web segment beam, the winch is fixed to the bridge deck by means of erecting a support, planting reinforcement, and connecting the bridge deck fixed structure, thereby stably fixing the winch on the bridge deck, which is conducive to the threading construction of the extra-long steel strands 4.

[0046] In summary, the present invention is used for the bundle threading of super-long cables after the segment beam is assembled. The wire rope traction cable is bundled to the other end of the corrugated tube in the beam body through the bundle threading machine, and the steel cable traction cable is pulled to the other end of the corrugated tube through the winch and the wire rope traction cable. The overall bundle threading of the steel strand is completed through the winch and the steel cable traction cable. The method has simple steps and convenient construction. It overcomes the current situation that the bundle threading of prestressed pipes over 100 meters is difficult, the steps are cumbersome, time-consuming and labor-intensive, and inefficient.

[0047] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A method for threading super-long steel strands in a corrugated steel web segment beam, characterized in that: The steps include: Step 1, by moving the wire rope traction rope, one end of the wire rope traction rope is passed through the corrugated pipe from one end of the corrugated pipe and passed out from the other end of the corrugated pipe; Step 2, connecting one end of the steel wire rope traction rope with one end of the steel cable traction rope; Step 3, by moving the steel wire rope traction rope in the opposite direction, one end of the steel wire rope traction rope is passed into the corrugated tube from the other end of the corrugated tube and passed out from one end of the corrugated tube, so that the two ends of the steel wire rope traction rope are respectively located outside the corrugated tube, and the other end of the steel wire rope traction rope is connected to one end of the steel strand; Step 4, by moving the steel cable traction rope, one end of the steel strand is passed into the corrugated tube from the other end of the corrugated tube and passed out from one end of the corrugated tube, so that the two ends of the steel strand are respectively located on the outside of the corrugated tube.

2. The method for threading super-long steel strands in a corrugated steel web segment beam according to claim 1, characterized in that: In step 1, the wire rope traction rope is moved by the bunching machine, and one end of the wire rope traction rope is passed into the corrugated tube from one end of the corrugated tube and passed out from the other end of the corrugated tube.

3. The method for threading super-long steel strands in a corrugated steel web segment beam according to claim 1, characterized in that: In step 3, the wire rope traction rope is moved in the reverse direction by the bunching machine, and one end of the wire rope traction rope is passed into the corrugated tube from the other end of the corrugated tube and passed out from one end of the corrugated tube.

4. The method for threading super-long steel strands in a corrugated steel web segment beam according to claim 1, characterized in that: In step 4, the steel cable traction rope is moved by a winch, and one end of the steel strand is passed into the corrugated tube from the other end of the corrugated tube and passed out from one end of the corrugated tube, so that the two ends of the steel strand are respectively located on the outside of the corrugated tube.

5. The method for bundling super-long steel strands in a corrugated steel web segment beam according to claim 1, characterized in that: The steel wire rope traction rope comprises a steel wire rope and a steel wire rope spring buckle used for connecting the steel cable traction rope, and the steel wire rope spring buckle is connected to the end of the steel wire rope by welding.

6. The method for threading super-long steel strands in a corrugated steel web segment beam according to claim 5, characterized in that: One end of the steel strand is provided with a guide cap for connecting a steel cable traction rope. The steel cable traction rope is a steel cable with rope buckles installed at both ends, one of which is connected to a steel wire rope spring buckle, and the other is connected to the guide cap.

7. The method for threading super-long steel strands in a corrugated steel web segment beam according to claim 6, characterized in that: The guide cap includes a guide cap body and a guide cap spring buckle. One end of the guide cap body is provided with a groove for accommodating and fixing the end of the steel strand. The other end of the guide cap body is fixedly connected to the guide cap spring buckle. The other rope buckle is connected to the guide cap spring buckle.

8. The method for bundling super-long steel strands in a corrugated steel web segment beam according to claim 1, characterized in that: When the bellows is in a suspended position, a bogie is used to cooperate with the beam threading work.

9. The method for bundling super-long steel strands in a corrugated steel web segment beam according to claim 2 or 3, characterized in that: The beam threading machine is fixed to the bridge deck by means of erecting brackets, planting reinforcement bars and connecting the bridge deck fixed structure.

10. The method for bundling super-long steel strands in a corrugated steel web segment beam according to claim 4, characterized in that: The winch is fixed to the bridge deck by means of erecting a support, planting reinforcement and connecting the bridge deck fixed structure.

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