Cable group synchronous tensioning device and construction method

Abstract

The application belongs to the technical field of building construction, and discloses a cable group synchronous tensioning device and a construction method. The cable group synchronous tensioning device comprises a tensioning tool, a first tensioning unit and a second tensioning unit. The tensioning tool is connected with a plurality of cables in the cable group. A connecting lug plate on a main body structure is used to be connected with a cable head. The tensioning tool is located on a side of the cable head away from the connecting lug plate. The first tensioning unit comprises a winding device. The winding device is used to wind and unwind a steel wire rope to tension the cable group. The second tensioning unit comprises a bidirectional lifting device and a telescopic adjusting device. The bidirectional lifting device is connected with the tensioning tool. One adjusting device is arranged on the tensioning tool corresponding to each cable. A telescopic end of the adjusting device is connected with the cable head. The cable group synchronous tensioning device and the construction method can realize synchronous tensioning of the cable group, improve the tensioning efficiency, and quickly and accurately adjust the cable length of each cable in the cable group, so that the cable shape and cable force of each cable in the cable group are consistent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a cable group synchronous tensioning device and construction method. BACKGROUND

[0002] In the traditional tensioning construction of cable structures, the tensioning jack is often connected with the cable head through a tensioning tool, and a hinged connecting piece is arranged at the anchoring end of the cable structure. This tensioning device can adaptively follow the rotation with the large amplitude change of the angle in the tensioning process, and can meet the requirements of large distance tensioning, and is currently widely used.

[0003] However, the above arrangement has the following disadvantages: 1) the tensioning jack is placed on the tensioning tool side and moves with the cable head, so a single-acting jack with a relatively short length is often used to reduce the eccentric bending moment on the cable body and facilitate the maintenance of its stable posture, but this also brings the problem that the tensioning process can only proceed but cannot be reversed; 2) the tensioning efficiency is low when using the tensioning jack for large distance tensioning. Due to the limitations of tensioning force requirements, cable manufacturing process, cost, etc., multiple cables are often arranged for cables with large tension, and the multiple cables form an integrated cable group through cable clamps. For a cable group composed of multiple cables, the above technical solution can also complete the tensioning work if each cable is tensioned one by one, but the efficiency is extremely low. If the cable group can be tensioned synchronously, the construction efficiency can be greatly improved, however, due to the mutual restriction of the cables in the cable group, the above technical solution cannot achieve synchronous tensioning.

[0004] Further, the manufacturing deviation of the cables is inevitable, so the lengths of the cables in a cable group will inevitably be different. If the cable group is tensioned synchronously, the cable shape and tension of each cable will also be different. Therefore, during the tensioning process, the length of each cable needs to be adjusted according to the measured results to make the cable shape and tension of each cable in the cable group consistent. However, during the synchronous tensioning process, the combined effects of the large tensioning force, the contact constraint between the ear plate and the cable head, the deflection and mutual restriction caused by the uneven lengths of the cables, etc. make it difficult to precisely adjust the cable length.

[0005] Therefore, there is an urgent need for a cable group synchronous tensioning device and construction method to solve the above-mentioned problems of "inability to achieve synchronous tensioning of the cable group and precise adjustment of the cable length". SUMMARY

[0006] The present application aims to provide a cable group synchronous tensioning device and construction method, which can not only achieve synchronous tensioning of the cable group and improve the tensioning efficiency, but also quickly and precisely adjust the cable length of each cable in the cable group to ensure that the cable shape and tension of each cable in the cable group are consistent.

[0007] To achieve this purpose, the present application adopts the following technical solutions:

[0008] In one aspect, a cable group synchronous tensioning device is provided, comprising:

[0009] A tensioning tool, the cable group comprising a plurality of cables, the tensioning tool being connected with the plurality of cables, each of the cables comprising a cable body and a cable head arranged at an end of the cable body, a plurality of connecting ear plates corresponding to the cables being arranged on a main structure, the connecting ear plates being used to be connected with the cable heads after the corresponding cables are tensioned in place, the tensioning tool being located on a side of the cable head away from the connecting ear plates;

[0010] A first tensioning unit, comprising a winding device, the winding device being wound with a steel wire rope, the steel wire rope being connected with the tensioning tool, the winding device being used to tension the cable group by winding and unwinding the steel wire rope;

[0011] A second tensioning unit, comprising a bidirectional lifting device and a telescopic adjusting device, the bidirectional lifting device being installed on the main structure and connected with the tensioning tool, the tensioning tool being provided with one adjusting device corresponding to each cable, a telescopic end of the adjusting device being connected with the cable head.

[0012] As a preferred scheme of the cable group synchronous tensioning device provided by the application, the winding device is arranged on a plane support, the first tensioning unit further comprises a guide wheel, the guide wheel being hinged on the plane support, the steel wire rope being wound around the guide wheel and connected with the tensioning tool.

[0013] As a preferred scheme of the cable group synchronous tensioning device provided by the application, the first tensioning unit further comprises at least one gravity block, the gravity block being placed on the plane support.

[0014] As a preferred scheme of the cable group synchronous tensioning device provided by the application, the first tensioning unit further comprises a pulley block, the pulley block comprising a first trolley and a second trolley, the first trolley being hinged on the main structure, the second trolley being hinged on the tensioning tool, the steel wire rope being wound around pulleys of the first trolley and the second trolley in sequence and connected on a pulley frame of the first trolley.

[0015] As a preferred scheme of the cable group synchronous tensioning device provided by the application, the bidirectional lifting device is provided with two, the tensioning tool being provided with two anchor units at intervals, each of the bidirectional lifting devices being connected with the corresponding anchor unit through a steel strand, the steel strands of the two bidirectional lifting devices being arranged on two sides of the cable group.

[0016] As a preferred scheme of the cable group synchronous tensioning device provided by the application, the main body structure is provided with a mounting bracket, the bidirectional lifting device is arranged on the mounting bracket, and an anchor cable dynamometer is arranged between the bidirectional lifting device and the mounting bracket, and the anchor cable dynamometer is used for detecting the tensioning force value provided by the bidirectional lifting device.

[0017] As a preferred scheme of the cable group synchronous tensioning device provided by the application, the adjusting device is provided with a force sensor, and the force sensor is used for monitoring the cable force value of the corresponding cable.

[0018] In a second aspect, a cable group synchronous tensioning construction method is provided, and the cable group synchronous tensioning device is used for construction, and the method comprises the following steps.

[0019] S1, the tensioning tool, the first tensioning unit and the second tensioning unit are installed in place;

[0020] S2, the winding device is started to pull the cable group close to the connecting lug plate through the steel wire rope;

[0021] S3, when the cable head of the cable approaches the connecting lug plate, the winding device stops running and is locked through a safety locking device;

[0022] S4, the bidirectional lifting device is connected with the tensioning tool;

[0023] S5, the bidirectional lifting device is started to gradually convert the tensioning force to the bidirectional lifting device;

[0024] S6, the cable head is adjusted to be able to smoothly enter the connecting lug plate;

[0025] S7, after the cable shape of any cable in the cable group is in place, the cable shape of the remaining cables is driven to be in place through the adjusting device;

[0026] S8, the distance between the pin hole of the cable head on each cable and the pin hole on the corresponding connecting lug plate is recorded as the cable length adjustment amount of the cable;

[0027] S9, each cable is fine-adjusted according to the cable length adjustment amount;

[0028] S10, after the cable length adjustment of all the cables is completed, the bidirectional lifting device and the adjusting device continue to tension, and a fixed pin shaft is installed after the pin hole of the cable head is aligned with the pin hole on the corresponding connecting lug plate;

[0029] S11, after all the cable heads are connected with the corresponding connecting lug plate through the pin shaft, the bidirectional lifting device gradually unloads the tensioning force, so that the tensioning force is transferred to the pin shaft position;

[0030] S12, remove the first tensioning unit and the second tensioning unit.

[0031] As a preferred scheme of the cable group synchronous tensioning construction method provided by the application,

[0032] In step S9, if the cable length of the cable cannot be adjusted, the bidirectional lifting device is retreated in displacement control mode until the cable length of the cable is adjusted.

[0033] The application has the following beneficial effects:

[0034] The application provides a cable group synchronous tensioning device and a construction method. In tensioning construction, first, a tensioning tool, a first tensioning unit and a second tensioning unit are installed in place, then the first tensioning unit is used to complete most of the early-stage stroke of the cable, specifically, a winding device drives the cable group to approach the connecting lug through the steel wire rope, when the cable head approaches the connecting lug, the winding device stops running and is locked by a safety locking device. Then, a bidirectional lifting device is connected to the tensioning tool, so that the second tensioning unit is used to complete the late-stage stroke of the cable. Specifically, the bidirectional lifting device is started, the cable group continues to be tensioned, so as to gradually transfer the tensioning force to the bidirectional lifting device, then the orientation of the cable head is adjusted to a state in which the cable head can smoothly enter the connecting lug. After the cable shape of any cable in the cable group is in place, the remaining cables are driven to be in place by an adjusting device. After the cable shapes of all the cables are in place, the distance between the pin hole of the cable head of each cable and the pin hole on the corresponding connecting lug is recorded as the cable length adjustment amount of the cable, then each cable is fine-adjusted according to the cable length adjustment amount. After the cable length adjustment of all the cables is completed, the bidirectional lifting device and the adjusting device continue to be tensioned, and the fixing pin shaft is installed after the pin hole of the cable head is aligned with the pin hole on the corresponding connecting lug; after all the cable heads are connected to the corresponding connecting lug through the pin shaft, the bidirectional lifting device gradually unloads the tensioning force, so that the tensioning force is transferred to the pin shaft position; finally, the first tensioning unit, the second tensioning unit and the corresponding devices are removed. Based on the characteristics that the early-stage tensioning force of the cable group is small and the late-stage tensioning force is large, the cable group synchronous tensioning device completes most of the early-stage tensioning stroke of the cable group through the cooperation of the first tensioning unit and the tensioning tool, effectively improves the tensioning efficiency, shortens the time in the air and reduces the construction risk; the late-stage tensioning work of the cable group is completed through the cooperation of the bidirectional lifting device and the adjusting device in the second tensioning unit, so that the cable shapes of all the cables can be simultaneously in place, and then the cable length adjustment amount of each cable can be accurately measured, thereby avoiding the problem that the cable shape needs to be repeatedly adjusted multiple times due to the adverse effects caused by the cable shape being in place one by one, and ensuring that the cable shapes and cable forces of all the cables in the cable group are consistent. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a schematic diagram of the cable group synchronous tensioning device provided by the embodiment of the application;

[0036] Figure 2 is Figure 1 is a view in A-A direction (showing the elevation view of the first tensioning unit)

[0037] Figure 3 is Figure 1 is a view in B-B direction (showing the elevation view of the second tensioning unit)

[0038] Figure 4 is a first connection schematic diagram of the tensioning tool and the cable set provided by the embodiment of the present application;

[0039] Figure 5 is a second connection schematic diagram of the tensioning tool and the cable set provided by the embodiment of the present application;

[0040] Figure 6 is a three-view diagram of the adjusting device provided by the embodiment of the present application.

[0041] In the drawings:

[0042] 1, tensioning tool; 2, first tensioning unit; 3, second tensioning unit; 4, anchor cable dynamometer;

[0043] 11, upper tool; 12, lower tool; 13, connecting bolt; 14, anchoring unit; 15, second ear plate;

[0044] 21, winding device; 22, steel wire rope; 23, guide wheel; 24, gravity block; 25, pulley set;

[0045] 251, first trolley; 252, second trolley;

[0046] 31, bidirectional lifting device; 311, steel strand; 32, adjusting device;

[0047] 321, telescopic end; 322, fixed end;

[0048] 100, tension cable; 101, cable body; 102, cable head;

[0049] 200, main structure; 201, connecting ear plate; 202, mounting bracket; 203, first ear plate;

[0050] 300, planar support; 400, operation platform. DETAILED DESCRIPTION

[0051] The present application will be further described below in conjunction with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0052] In the description of the present application, unless specifically defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the present application, unless specifically defined and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0054] In the description of the present embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in description and have no special meaning.

[0055] As shown in Figure 1 , Figure 2 and Figure 3 , the present embodiment provides a cable group synchronous tensioning device for tensioning a cable group. The device comprises a tensioning tool 1, a first tensioning unit 2 and a second tensioning unit 3.

[0056] Among them, the cable group comprises a plurality of cables 100, and the tensioning tool 1 is connected with the plurality of cables 100 in the cable group. As shown in Figure 1 and Figure 4 , each cable 100 comprises a cable body 101 and a cable head 102 arranged at the end of the cable body 101, and a plurality of connecting ear plates 201 corresponding to the cables 100 are arranged on the main body structure 200. The connecting ear plate 201 is used to connect with the cable head 102 after the corresponding cable 100 is tensioned in place, and the tensioning tool 1 is located on the side of the cable head 102 away from the connecting ear plate 201. That is, the cable head 102 is located between the main body structure 200 and the tensioning tool 1.

[0057] The first tensioning unit 2 is used to complete the most of the early tensioning stroke of the cable group, which comprises a winding device 21, a steel wire rope 22 wound on the winding device 21, and the steel wire rope 22 connected with the tensioning tool 1, and the winding device 21 is used to tension the cable group by winding and unwinding the steel wire rope 22.

[0058] The second tensioning unit 3 is used to complete the remaining tensioning stroke of the cable group, which comprises a bidirectional lifting device 31 installed on the main structure 200 and connected with the tensioning tool 1, and an extendable adjusting device 32 arranged on the tensioning tool 1 corresponding to each cable 100, and the extension end 321 of the adjusting device 32 is connected with the cable head 102 to tension the single cable 100.

[0059] During the tensioning construction, the tensioning tool 1, the first tensioning unit 2 and the second tensioning unit 3 are first installed in place, and then the first tensioning unit 2 is used to complete the most of the early stroke of the cable 100, specifically, the winding device 21 pulls the cable group close to the connecting lug plate 201 through the steel wire rope 22, and when the cable head 102 approaches the connecting lug plate 201, the winding device 21 stops running and is locked by the safety locking device. Then, the bidirectional lifting device 31 is connected with the tensioning tool 1, so as to complete the later stroke of the cable 100 by the second tensioning unit 3. Specifically, the bidirectional lifting device 31 is started, and the cable group continues to be tensioned to gradually transfer the tensioning force to the bidirectional lifting device 31, and then the orientation of the cable head 102 is adjusted to a state that the cable head 102 can smoothly enter the connecting lug plate 201. After the cable shape of any cable 100 in the cable group is in place, the cable shape of the remaining cables 100 is driven to be in place by the adjusting device 32. After the cable shape of all cables 100 is in place, the distance between the pin hole of the cable head 102 on each cable 100 and the pin hole on the corresponding connecting lug plate 201 is recorded as the cable length adjustment amount of the cable 100, and then each cable 100 is fine-adjusted according to the cable length adjustment amount. After the cable length adjustment of all cables 100 is completed, the tensioning is continued by the bidirectional lifting device 31 and the adjusting device 32, and after the pin hole of the cable head 102 is aligned with the pin hole on the corresponding connecting lug plate 201, a fixed pin shaft is installed; after all cable heads 102 are connected with the corresponding connecting lug plate 201 through the pin shaft, the bidirectional lifting device 31 gradually unloads the tensioning force to transfer the tensioning force to the pin shaft position; finally, the first tensioning unit 2, the second tensioning unit 3 and the corresponding devices are removed.

[0060] Based on the characteristics of small early-stage tension and large late-stage tension of the cable group, the synchronous tensioning device of the cable group completes most of the early-stage tensioning of the cable group through cooperation of the first tensioning unit 2 and the tensioning tool 1, effectively improves the tensioning efficiency, shortens the time in the air, and reduces the construction risk; the late-stage tensioning of the cable group is completed through cooperation of the bidirectional lifting device 31 and the adjusting device 32 in the second tensioning unit 3, so that the shapes of all the cables 100 can be simultaneously positioned, and then the cable length adjusting amount of each cable 100 can be accurately measured, the problem of repeated adjustment caused by the adverse effects of the positioning of the cables 100 one by one is avoided, and the shapes and tensions of the cables 100 in the cable group are ensured to be consistent.

[0061] For the tensioning of the cable group, there are mutual constraints among the cables 100, and complex situations such as contact and constraint of the multi-cable heads 102 and the connecting ear plates 201, which bring difficulties to the cable length adjustment under high tensioning state, the tensioning device provided in the embodiment uses the bidirectional lifting device 31 to lift with load, reduces the tensioning force, and at the same time, the adjusting device 32 can appropriately stagger the cables 100, so that the cable length adjustment is facilitated, the operation risk of the operator and the damage to the cables 100 are reduced, and the construction quality is improved.

[0062] Referring to Figure 2 , the winding device 21 is arranged on a plane support 300, the first tensioning unit 2 further includes a guide wheel 23, the guide wheel 23 is hinged to the plane support 300, the steel wire rope 22 passes through the guide wheel 23 and is connected with the tensioning tool 1. In the embodiment, the winding device 21 is preferably a winch, the winch and the guide wheel 23 are connected to the same plane support 300, so that the horizontal forces generated by the winch traction are balanced with each other.

[0063] Further, the first tensioning unit 2 further includes at least one gravity block 24, the gravity block 24 is placed on the plane support 300, and the vertical force generated by the winch traction of the steel wire rope 22 is balanced with each other, and then the plane support 300 can be directly placed on the ground, and the shear resistance, uplift resistance and other measures are not required to meet the resistance requirement.

[0064] Still further, referring to Figure 2 , the pulley block 25 includes a first pulley 251 and a second pulley 252, the first pulley 251 is hinged to the main body structure 200, and specifically, the main body structure 200 is provided with a first ear plate 203, and the pulley frame of the first pulley 251 is hinged to the first ear plate 203. The second pulley 252 is hinged to the tensioning tool 1, and specifically, referring to Figure 4 and Figure 5The second ear plate 15 is arranged on the tensioning tool 1, and the pulley frame of the second trolley 252 is hinged to the second ear plate 15. The steel wire rope 22 bypassing the guide wheel 23 is sequentially wound around the pulleys of the first trolley 251 and the second trolley 252, and is connected to the pulley frame of the first trolley 251. After the winding device 21 (winch) is started, the tensioning of the cable group is realized through the guide wheel 23, the pulley block 25 and the tensioning tool 1.

[0065] As shown in Figure 4 and Figure 5 , a structural schematic diagram of the tensioning tool 1 is given. The tensioning tool 1 comprises an upper tool 11 and a lower tool 12, and connecting bolts 13, and the upper tool 11 and the lower tool 12 are arranged with arc-shaped grooves for accommodating the cable body 101 on the sides facing each other, and the upper tool 11 and the lower tool 12 are buckled and fixed through the connecting bolts 13. The model of the tensioning tool 1 can be determined according to the number of the cables 100 in the cable group, as shown in Figure 4 , the tensioning tool 1 selected for fixing two cables 100, as shown in Figure 5 , the tensioning tool 1 selected for fixing three cables 100.

[0066] As shown in Figure 4 and Figure 5 , after the upper tool 11 and the lower tool 12 are buckled, the arc-shaped grooves on the two tools are one-to-one opposite to form a circular groove, and the cable body 101 of the cable 100 is arranged in the circular groove. That is, the tensioning tool 1 is connected with the cable 100 in a hoop, and further, the tensioning tool 1 is in pressure contact with the protruding part of the cable head 102, so as to realize the transmission of the tensioning force between the tensioning tool 1 and the cable head 102. A plurality of connecting bolts 13 are arranged along the joint of the upper tool 11 and the lower tool 12, so as to ensure the stability of the connection between the tensioning tool 1 and the cable group.

[0067] In the embodiment, the first tensioning unit 2 comprises two winding devices 21, and correspondingly, the guide wheel 23 and the pulley block 25 are also provided with two, as shown in Figure 4 , the tensioning tool 1 is arranged with one second ear plate 15 on each side of the cable 100, and the two second ear plates 15 are symmetrical and one-to-one correspondingly hinged to the second trolley 252 in the two pulley blocks 25, so as to ensure the balance of tensioning.

[0068] As shown in Figure 1 and Figure 3 , the bidirectional lifting device 31 is provided with two, and the tensioning tool 1 is arranged with two anchoring units 14 (as shown in Figure 4 and Figure 5As shown, each bidirectional lifting device 31 is connected to the corresponding anchoring unit 14 via steel strands 311, and the steel strands 311 of the two bidirectional lifting devices 31 are respectively located on both sides of the cable assembly. That is, the two bidirectional lifting devices 31 are respectively connected to both sides of the tensioning fixture 1 via a set of steel strands 311 to ensure that the tension cable 100 is subjected to balanced force during tensioning. In addition, the two bidirectional lifting devices 31 can operate independently to level the tensioning fixture 1.

[0069] In this embodiment, the bidirectional lifting device 31 has equal bidirectional lifting and lowering capabilities under load, enabling tensioning and retraction of the cable assembly. It is important to emphasize that when the first tensioning unit 2 pulls the tensioning fixture 1, the bidirectional lifting device 31 is not connected to the anchoring unit 14 on the tensioning fixture 1. Only after the first tensioning unit 2 has completed tensioning and locking is the steel strand 311 of the bidirectional lifting device 31 connected and fixed to the anchoring unit 14.

[0070] See Figure 1 and Figure 3 The main structure 200 has a mounting bracket 202 on the side opposite to the connecting ear plate 201. The bidirectional lifting device 31 is mounted on the mounting bracket 202. The main structure 200 has high rigidity and strength, and can easily withstand the eccentric bending moment transmitted by the long bidirectional lifting device 31.

[0071] See Figure 6 The diagram shows a three-view drawing of the adjusting device 32. The adjusting device 32 includes a fixed end 322 and a telescopic end 321. The fixed end 322 is connected to the tensioning fixture 1, and the telescopic end 321 is connected to the cable head 102 of the cable 100. The telescopic end 321 can extend relative to the fixed end 322 to tension the corresponding cable 100. For example, the adjusting device 32 can be a U-shaped jack. By lifting under load, it can compensate for the length deviation of each cable 100 in the cable group and control the horizontal deflection of the tensioning fixture 1, so that the cable head 102 can smoothly enter the connecting ear plate 201, reducing the constraint effect of the connecting ear plate 201 on the cable head 102, protecting the cable head 102, and providing a prerequisite for cable length adjustment. In addition, during the tensioning and fine-tuning stage, the adjustment device 32 can ensure that each cable 100 reaches its position simultaneously, so as to achieve a one-time accurate measurement of the cable length adjustment, avoiding the mutual influence caused by the cable 100 being positioned one by one, and avoiding repeated adjustments of the cable 100.

[0072] See Figure 1 and Figure 3 An anchor cable force gauge 4 is installed between the bidirectional lifting device 31 and the mounting bracket 202. The anchor cable force gauge 4 is used to detect the tension force provided by the bidirectional lifting device 31. When the bidirectional lifting device 31 is started to gradually transfer the tension force on the pulley block 25 to the bidirectional lifting device 31, the value of the anchor cable force gauge 4 gradually increases.

[0073] In this embodiment, the adjusting device 32 is optionally provided with a force sensor for monitoring the cable force value of the corresponding cable 100. That is, each cable 100 has a corresponding force sensor for cable force value measurement, accurately controlling the form of the cable 100.

[0074] The embodiment also provides a cable group synchronous tensioning construction method, which uses the cable group synchronous tensioning device described above for construction, and includes the following steps:

[0075] S1, the tensioning tool 1, the first tensioning unit 2 and the second tensioning unit 3 are installed in place.

[0076] Specifically, in step S1, the specific construction process is as follows:

[0077] S11, the cable clamp installation between each cable 100 in the cable group is completed, so as to form an integrated cable group.

[0078] S12, the adjusting device 32 and the tensioning tool 1 are installed on the cable group. As shown in Figure 4 and Figure 5 , it is a schematic diagram of the adjusting device 32 and the tensioning tool 1 after installation.

[0079] S13, the winding device 21 (winch) and the guide wheel 23 are connected to the plane support 300, and are hoisted and installed in place to the designated construction point.

[0080] S14, the counterweight is hoisted to the plane support 300.

[0081] S15, the operator completes the threading of the steel wire rope 22 on the pulley block 25 on the ground.

[0082] S16, the working platform 400 is erected on the main structure 200 for the high-altitude operator to use when installing the cable group and related equipment.

[0083] S17, the second pulley 252 of the pulley block 25 is hinged to the second ear plate 15 on the tensioning tool 1, and then the first pulley 251 is hoisted by the crane to the high altitude and hinged to the first ear plate 203 on the main structure 200.

[0084] S18, the bidirectional lifting device 31 and the anchor cable force meter 4 are installed on the main structure 200 through the installation bracket 202.

[0085] After the above installation work is completed, the subsequent operation steps are performed.

[0086] S2, the winding device 21 is started to pull the cable group close to the connecting ear plate 201 through the steel wire rope 22.

[0087] S3, when the cable head 102 of the cable 100 approaches the connecting lug plate 201, the winding device 21 stops running and is locked by a safety locking device, so as to maintain the cable group in the existing position.

[0088] S4, the bidirectional lifting device 31 is connected with the tensioning tool 1. Specifically, the steel strand 311 of the bidirectional lifting device 31 is connected and fixed with the anchoring unit 14 on the tensioning tool 1 on the operation platform 400.

[0089] S5, the bidirectional lifting device 31 is started to gradually convert the tensioning force to the bidirectional lifting device 31. Specifically, the bidirectional lifting device 31 slowly tensions the steel strand 311 in displacement control mode, and gradually converts the tensioning force from the pulley block 25 to the bidirectional lifting device 31; when the steel wire rope 22 on the pulley block 25 is obviously relaxed, the pulley block 25 can be removed.

[0090] S6, the cable head 102 is adjusted to be able to smoothly enter the connecting lug plate 201. Specifically, the bidirectional lifting device 31 continues to tension in displacement control mode, and when the cable head 102 is about to enter the lug plate, the cable head 102 can be adjusted to be able to smoothly enter the connecting lug plate 201 through the separate action of the left and right bidirectional lifting devices 31. If the bidirectional lifting device 31 cannot achieve this function, the adjusting device 32 can be opened for further adjustment.

[0091] S7, after the cable shape of any cable 100 in the cable group is in place, the cable shape of the remaining cable 100 is driven to be in place by the adjusting device 32. Specifically, the bidirectional lifting device 31 continues to tension in displacement control mode, and after the cable shape of a certain cable 100 in the cable group is in place first, it is checked whether the cable shape of the remaining cable 100 is in place. For the cable 100 that is not in place, the corresponding adjusting device 32 is opened, and the adjusting device 32 is slowly jacked up the cable head 102 in displacement control mode until the cable shape is in place. After the cable shape of all cables 100 is in place, step S8 is performed.

[0092] S8, the distance between the pin hole of the cable head 102 on each cable 100 and the pin hole on the corresponding connecting lug plate 201 is recorded as the cable length adjustment amount of the cable 100.

[0093] S9, each cable 100 is fine-tuned according to the cable length adjustment amount recorded in step S8.

[0094] In step S9, if the cable length of the cable 100 cannot be adjusted, the bidirectional lifting device 31 is retreated in displacement control mode until the cable length of the cable 100 can be adjusted. Specifically, due to factors such as tensioning force, lug plate constraint, insufficient space, etc., the cable length may not be adjusted smoothly. After the bidirectional lifting device 31 is retreated in displacement control mode, the above-mentioned influences can be overcome until the cable length can be adjusted relatively easily.

[0095] S10, after the cable length adjustment of all the cables 100 is completed, continue to tension through the bidirectional lifting device 31 and the adjusting device 32, and install the fixed pin shaft after the pin hole of the cable head 102 is aligned with the pin hole on the corresponding connecting lug plate 201; during the process, the bidirectional lifting device 31 and the adjusting device 32 are lifted in displacement control mode.

[0096] S11, after all the cable heads 102 are connected with the corresponding connecting lug plates 201 through the pin shaft, the bidirectional lifting device 31 gradually unloads the tensioning force, so that the tensioning force is transferred to the position of the pin shaft; specifically, during the process, the bidirectional lifting device 31 is slowly unloaded in displacement control mode or force control mode, and the transition of the tensioning force from the steel strand 311 to the pin shaft is completed. After the tensioning force on the steel strand 311 is unloaded, step S12 is performed.

[0097] S12, remove the first tensioning unit 2 and the second tensioning unit 3.

[0098] Based on the characteristics that the pre-stage tensioning force of the cable group is small and the post-stage tensioning force is large, the synchronous tensioning construction method of the cable group first completes most of the stroke of the pre-stage tensioning of the cable group through the cooperation of the first tensioning unit 2 and the tensioning tool 1, effectively improves the tensioning efficiency, shortens the time in the air, and reduces the construction risk; secondly, the post-stage tensioning work of the cable group is completed through the cooperation of the bidirectional lifting device 31 and the adjusting device 32 in the second tensioning unit 3, which can realize the simultaneous arrival of the cable shape of all the cables 100, and then the cable length adjustment amount of each cable 100 can be accurately measured, thereby avoiding the problem that the cable 100 needs to be repeatedly adjusted due to the adverse effects caused by the arrival of the cable shape one by one, and ensuring that the cable shape and the cable force of each cable 100 in the cable group are consistent.

[0099] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A cable group synchronous tensioning device, characterized in that, include: The tensioning fixture (1) includes multiple cables (100), and the tensioning fixture (1) is connected to the multiple cables (100). Each cable (100) includes a cable body (101) and a cable head (102) disposed at the end of the cable body (101). The main structure (200) is provided with multiple connecting ear plates (201) corresponding to each cable (100). The connecting ear plates (201) are used to connect with the cable head (102) after the corresponding cable (100) is tensioned into place. The tensioning fixture (1) is located on the side of the cable head (102) facing away from the connecting ear plates (201). The first tensioning unit (2) includes a winding device (21) on which a steel wire rope (22) is wound. The steel wire rope (22) is connected to the tensioning fixture (1). The winding device (21) tensions the cable group by winding and unwinding the steel wire rope (22). The second tensioning unit (3) includes a bidirectional lifting device (31) and a retractable adjustment device (32). The bidirectional lifting device (31) is installed on the main structure (200) and connected to the tensioning fixture (1). The tensioning fixture (1) is provided with an adjustment device (32) for each cable (100). The telescopic end (321) of the adjustment device (32) is connected to the cable head (102). The winding device (21) is mounted on a planar support (300). The first tensioning unit (2) also includes a guide wheel (23), which is hinged to the planar support (300). The wire rope (22) passes around the guide wheel (23) and is connected to the tensioning fixture (1). The first tensioning unit (2) further includes a pulley block (25), which includes a first trolley (251) and a second trolley (252). The first trolley (251) is hinged to the main structure (200), and the second trolley (252) is hinged to the tensioning fixture (1). The wire rope (22) passes through the pulleys of the first trolley (251) and the second trolley (252) in sequence and is connected to the pulley frame of the first trolley (251).

2. The cable group synchronous tensioning device according to claim 1, characterized in that, The first tensioning unit (2) further includes at least one gravity block (24), which is placed on the planar support (300).

3. The cable group synchronous tensioning device according to claim 1, characterized in that, Two bidirectional lifting devices (31) are provided, and two anchoring units (14) are provided at intervals on the tensioning fixture (1). Each bidirectional lifting device (31) is connected to the corresponding anchoring unit (14) through a steel strand (311). The steel strands (311) of the two bidirectional lifting devices (31) are respectively located on both sides of the cable group.

4. The cable group synchronous tensioning device according to any one of claims 1-3, characterized in that, The main structure (200) is provided with an installation bracket (202), the bidirectional lifting device (31) is provided on the installation bracket (202), and an anchor cable force gauge (4) is provided between the bidirectional lifting device (31) and the installation bracket (202). The anchor cable force gauge (4) is used to detect the tension value provided by the bidirectional lifting device (31).

5. The cable group synchronous tensioning device according to any one of claims 1-3, characterized in that, The adjustment device (32) is equipped with a force sensor, which is used to monitor the cable force value of the corresponding cable (100).

6. A method for synchronous tensioning of cable groups, characterized in that, Construction using the cable group synchronous tensioning device as described in any one of claims 1-5 includes the following steps: S1. The tensioning fixture (1), the first tensioning unit (2), and the second tensioning unit (3) are installed in place; S2. Start the winding device (21) to pull the cable group close to the connecting lug (201) via the wire rope (22). S3. When the cable head (102) of the cable (100) approaches the connecting ear plate (201), the winding device (21) stops operating and is locked by the safety locking device. S4. Connect the bidirectional lifting device (31) to the tensioning fixture (1). S5. Start the bidirectional lifting device (31) to gradually transfer the tension to the bidirectional lifting device (31). S6. Adjust the cable head (102) so that it can smoothly enter the connecting ear plate (201); S7. After any of the cables (100) in the cable group is in position, the remaining cables (100) are driven into position by the adjustment device (32); S8. Record the distance between the pin hole of the cable head (102) on each cable (100) and the pin hole on the corresponding connecting ear plate (201), as the cable length adjustment amount of the cable (100); S9. Fine-tune each of the cables (100) according to the cable length adjustment amount. S10. After the cable length adjustment of all the cables (100) is completed, tensioning continues through the bidirectional lifting device (31) and the adjustment device (32). After the pin hole of the cable head (102) is aligned with the pin hole on the corresponding connecting ear plate (201), the fixing pin is installed. S11. After all the cable heads (102) are connected to the corresponding connecting ear plates (201) by pins, the bidirectional lifting device (31) gradually unloads the tension force, so that the tension force is transferred to the pin position. S12. Remove the first tensioning unit (2) and the second tensioning unit (3).

7. The method for synchronous tensioning of cable groups according to claim 6, characterized in that, In step S9, if the length of the cable (100) cannot be adjusted, the bidirectional lifting device (31) retracts in a displacement control manner until the length of the cable (100) can be adjusted.

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