Adjustable main buckle integrated type section steel tower cable wind connecting structure and construction method

Abstract

The invention discloses an adjustable main buckling integrated type section steel tower cable wind connecting structure and a construction method thereof. The cable wind connecting structure comprises a tower side cable wind buckling and hanging connecting structure, a tower waist cable wind hanging connecting structure and a tower top cable wind connecting structure, and corresponding cable wind ropes, tensioning end universal joints and cable wind ground anchors matched with the cable wind connecting structure, the tower waist cable wind hanging connecting structure and the tower top cable wind connecting structure. The construction method comprises the following construction steps: step 1, calculating the stress of the section steel tower wind cable system; 2, a tower mooring rope anchoring device and a tensioning end are installed before the tower is installed; 3, a tower wind cable system is installed in the tower installation process; 4, the tower wind cable system is tensioned step by step; and 5, in the tower dismantling process, the wind cable system is released, pulled and dismantled step by step. The structure of the technology has the advantages of being simple in structure, safe, reliable, clear in stress, small in steel consumption and capable of adjusting the angle of the cable rope, meanwhile, the method is convenient to assemble and disassemble and high in construction efficiency, it can be guaranteed that the displacement of the section steel tower is within the allowable range when the section steel tower works, and the construction safety risk of tower cable hoisting and cable-stayed buckling operation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tower wind cables of cable crane systems, and in particular to an adjustable main buckle-integrated steel tower cable wind connection structure and a construction method thereof. Background Art

[0002] The cable crane system is a crane system with a tower as the main load-bearing component. The tower is mainly composed of vertical column units and horizontal connection units. The tower columns are mainly round tubes, universal rods and steel. In order to ensure the stability of the tower, a tower cable wind connection structure is required. The existing literature on the tower cable wind connection structure is excerpted as follows: 1. Chinese Patent: Tower Cable with Installation Device; Application Number: 2017107595755; Applicant: Guangxi Road and Bridge Engineering Group Co., Ltd.; Abstract: The invention discloses a tower cable with installation device, including a column joint, an anchoring device, a cable and a tensioning device, the column joint is tubular, the bottom end of the column joint is the column connection end, the top end of the column joint is provided with a flange, and the outer side wall of the column joint is fixedly provided with a cable seat plate; the anchoring device comprises a first connecting frame and a second connecting frame, the first connecting frame and the cable seat plate are hinged through a transversely arranged first hinge shaft, the other end of the first connecting frame is hinged with one end of the second connecting frame through a second hinge shaft, the second hinge shaft is perpendicular to the first hinge shaft, and the other end of the second connecting frame is fixedly connected to one end of the cable; the tensioning device comprises an anchoring frame, the upper end of the anchoring frame is fixedly connected to the other end of the cable, the lower end of the anchoring frame is hinged with an anchoring base plate, and the anchoring base plate is fixedly provided with a plurality of anchoring steel bars. The tower cable wind rope with the installation device can solve the technical problem that the connection between the cable wind rope and the tower is easily broken by repeated force.

[0003] 2. Chinese Patent: A flexibly installable tower wind-cable ring beam and a tower; Application No. 202011419085.9; Applicant: Tongji University Architectural Design Institute (Group) Co., Ltd.; Abstract: The present invention relates to a flexibly installable tower wind-cable ring beam and a tower, the tower wind-cable ring beam comprises a ring beam, four upper tower column connecting sections, four lower tower column connecting sections, eight ring beam connecting plates, intermediate wind-cable ear plates and balance cable ear plates, the ring beam is rectangular, the top end of the upper tower column connecting section is fixedly connected to the ring beam connecting plate, the bottom end of the lower tower column connecting section is fixedly connected to the ring beam connecting plate, the intermediate wind-cable ear plate is fixedly arranged on one side of the ring beam, and the balance cable ear plate is fixedly arranged on the other side of the ring beam, and the tower comprises a tower wind-cable ring beam. Compared with the prior art, the present invention improves the lateral stability of the tower. The position of the tower cable wind ring beam is flexible and can adapt to cable winds at various heights. Compared with the random installation of cable winds on the tower body, the tower cable wind ring beam and the middle cable wind ear plate have high strength and can withstand larger loads, completely avoiding the safety hazards caused by the installation of temporary cable winds in the middle of the tower in traditional projects.

[0004] Since steel has the advantages of wide flange, large lateral stiffness, strong mechanical properties in fixed direction and strong bending resistance, it is used in steel towers. In order to adapt to various load requirements, including self-weight, hoisting weight, cable force, balanced cable force, wind load and other loads, the steel tower of the cable crane system needs to be equipped with wind cables that meet the calculation standards at the top, waist and side of the steel tower. Through the stable connection between the wind cable and the tower, the verticality of the tower can be adjusted during the installation of the tower body and the overall stability of the hoisting process can be ensured. Through application research, it was found that the tower wind rope with installation device in document 1, which is suitable for large round tube towers and combined round tube tower structures, cannot achieve the wind cable connection of the steel tower. When using the wind cable ring beam of the tower in document 2, only a balanced cable ear plate is set at the connection end with the tower, which leads to poor stability of the connection structure. At the same time, the strength requirements of the tower column connection plate are high, which increases the cost and also brings safety hazards. Moreover, since the main buckle-integrated steel tower is a new type of tower, there is no literature report on the design of its wind cable system. The top, waist and side wind cables of the steel tower need to be connected to the box beam, upper and lower flange plates and side flange plates respectively. Therefore, combined with the structural characteristics of the main buckle-integrated H-shaped steel tower, it is particularly important to tailor a wind cable connection structure with adjustable wind cable angle and its construction method. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustable main-buckle-type steel tower cable wind connection structure and a construction method in view of the problems existing in the prior art. The steel tower cable wind connection structure proposes three types of tower top cable wind, tower waist cable wind and tower side cable wind connection structures according to different installation positions. It can be directly connected with the tower column and the tower top box beam, and has the advantages of simple and light structure, no need to wrap the tower column connecting plate, direct bolted installation, and adjustable cable wind angle.

[0006] The present invention is achieved by adopting the following technical solutions: An adjustable main-buckle-in-one steel tower cable wind connection structure, which includes a tower side cable wind buckle hanging connection structure, a tower waist cable wind hanging connection structure and a tower top cable wind connection structure; the tower side cable wind buckle hanging connection structure includes a side cable wind rope, a side cable wind anchoring device, a first anchoring end, a first hinged shaft, a second anchoring end, a second hinged shaft, a tensioning end universal joint and a cable wind ground anchor, one end of the side cable wind rope is riveted to the cable wind ground anchor through the tensioning end universal joint, the other end of the side cable wind rope is riveted to the first anchoring end, the first anchoring end and the second anchoring end are hinged through the first hinged shaft, the second anchoring end is connected to the side cable wind anchoring device through the second hinged shaft, the side cable wind angle can be flexibly adjusted, and the side cable wind anchoring device is bolted to the outer flange plate of the H-shaped steel column of the tower.

[0007] The tower waist cable wind hanging connection structure includes a waist cable wind rope, a waist cable wind anchoring device, a first anchoring end, a first hinged shaft, a second anchoring end, a second hinged shaft, a tensioning end universal joint and a cable wind ground anchor. One end of the waist cable wind rope is riveted to the cable wind ground anchor through the tensioning end universal joint, the other end of the waist cable wind rope is riveted to the first anchoring end, the first anchoring end and the second anchoring end are hinged through the first hinged shaft, the second anchoring end and the waist cable wind anchoring device are connected through the second hinged shaft, and the waist cable wind anchoring device is installed between the inner flange plate and the outer flange plate of the H-shaped steel column of the tower frame through the waist cable wind high-strength bolts.

[0008] The tower top wind cable connection structure includes a top wind cable, a top wind cable anchor device, a first anchor end, a first hinge shaft, a second anchor end, a second hinge shaft, a tensioning end universal joint and a wind cable ground anchor. One end of the top wind cable is connected to the wind cable ground anchor through a tensioning end universal joint, the other end of the top wind cable is riveted to the first anchor end, the first anchor end is hinged to the second anchor end through a first hinge shaft, the second anchor end is connected to the top wind cable anchor device through a second hinge shaft, and the top wind cable anchor device is welded to the outer wall steel plate of the tower top box beam. The tensioning end universal joint is provided with a pre-buried hole, and the anchor steel bar passes through the pre-buried hole and is bonded and anchored to the contact interface of the wind cable ground anchor, so that stress transfer can be achieved between the tensioning end universal joint and the wind cable ground anchor concrete.

[0009] The side cable wind anchoring device comprises a side cable wind connection ear plate and a side cable wind connection seat plate. The side cable wind connection ear plate is fixedly connected to the center line position of one side of the side cable wind connection seat plate. The side cable wind connection ear plate is provided with a hinge hole for hingedly connecting to the second anchoring end through a second hinge shaft. The side cable wind connection seat plates on both sides of the side cable wind connection ear plate are provided with bolt holes for bolting to the outer flange plate of the H-shaped steel column of the tower through side cable wind high-strength bolts. After the other side of the side cable wind connection seat plate is fitted with the outer flange plate of the H-shaped steel column, it is bolted through the side cable wind high-strength bolts.

[0010] Further preferably, both sides of the side cable wind connection ear plate are reinforcedly connected to the side cable wind connection seat plate through side cable wind stiffening plates respectively.

[0011] Further preferred: the waist cable wind anchoring device includes a waist cable wind connecting seat plate, one side of the waist cable wind connecting seat plate is fixedly connected with two parallel waist cable wind connecting ear plates for being hinged to the second anchoring end through a second hinge axis, and a hinge hole is arranged on the waist cable wind connecting ear plate, and the other side of the waist cable wind connecting seat plate is fixed with two parallel waist cable wind inner plug-in plates for being inserted between the inner flange plate and the outer flange plate of the H-shaped steel column of the tower, and the waist cable wind inner plug-in plates are provided with bolt holes for bolting with the inner flange plate and the outer flange plate, and the waist cable wind inner plug-in plates are bolted with the inner flange plate and the outer flange plate through waist cable wind high-strength bolts.

[0012] Further preferably, waist cable wind cross partitions are respectively arranged between the two parallel waist cable wind connecting ear plates and between the two parallel waist cable wind inner plug-in plates.

[0013] Further preferably, the waist cable wind connection ear plate and the waist cable wind connection seat plate are further reinforced with a waist cable wind outer side stiffening plate.

[0014] Further preferably, the waist cable wind inner plug-in plate and the waist cable wind connection seat plate are further reinforced with a waist cable wind inner side stiffening plate to enhance the lateral constraint and overall bearing capacity with the waist cable wind connection ear plate and the waist cable wind inner plug-in plate.

[0015] Further preferred: the top cable wind anchor device comprises two parallel top cable wind connection ear plates, top cable wind cross partitions are respectively arranged at the upper end, middle part and lower end positions between the two parallel top cable wind connection ear plates, two groups of hinge holes are arranged on the two parallel top cable wind connection ear plates for hinged connection with the second anchor end through the second hinge shaft, single or multiple bundles of top cable wind ropes can be arranged according to the wind force of the tower top cable, and the sides of the two parallel top cable wind connection ear plates away from the top cable wind ropes are welded to the outer wall steel plate of the tower top box girder. The connection ear plate of the side cable wind anchor device is a single-piece structure, and the connection ear plates of the waist cable wind anchor device and the top cable wind anchor device are double-piece structures. Each bundle of side cable wind ropes, waist cable wind ropes and top cable wind ropes is composed of several steel strands, and the group anchor method is used to tension and relax the whole bundle step by step. Before the cable wind ropes are tensioned and relaxed, the relocation winch and jack should be maintained and inspected before use to ensure that all performance of the equipment is in the best condition; when the side cable wind ropes, waist cable wind ropes and top cable wind ropes are tensioned and relaxed, the steel tower frame will slowly deviate. The surveyor needs to observe the tower deviation during the construction period and determine the tensioning and relaxation of the cable wind ropes based on the measurement data, so as to ensure that the tower deviation of the steel tower frame is within the allowable value.

[0016] Further preferably, the first anchoring end, the first hinge axis, the second anchoring end and the second hinge axis of the tower side cable wind buckle connection structure, the tower waist cable wind hanging connection structure and the tower top cable wind connection structure adopt the same structural form, but the size is different. The tension end universal joint and the cable wind ground anchor are common device structures in the industry.

[0017] The construction method of the adjustable main buckle-integrated steel tower cable wind connection structure comprises the following steps: Step 1, force calculation of steel tower wind cable system; According to the unbalanced horizontal force generated by the load-bearing cables, buckle cables, balance cables, etc. on the tower during the installation of the main bridge, the force calculation of the steel tower wind cable system is carried out, including the foundation bearing capacity, shear state, passive earth pressure and stability of the cable wind anchor, calculation of the anti-sliding safety factor, anti-overturning safety factor and anti-pulling safety factor; calculation of the tensioning force of the side cable wind rope, waist cable wind rope and top cable wind rope; calculation of the Misses stress and crack of the tower side cable wind buckle connection structure, tower waist cable wind hanging connection structure, tower top cable wind connection structure and tensioning end universal joint. Finite element software should be used for detailed structure verification of the tower cable wind anchorage end and tensioning end. The most unfavorable load condition takes the most unfavorable angle and load that the tower cable wind can adjust.

[0018] Step 2: Install the tower cable wind anchor device and the tensioning end before installing the tower; The cable wind anchors for waist and top cable winds are set at the front and rear positions of the tower, and the cable wind anchors for side cable winds are set at both sides of the tower. The basic structure dimensions of the cable wind anchors are designed based on the calculation results, and the position of the cable wind ground anchor is determined according to the actual terrain on site. The tensioning end universal joint of the tensioning end of the cable wind rope should be pre-buried before the pouring of the cable wind anchor; the side cable wind anchors, waist cable wind anchors and top cable wind anchors on the steel tower are installed in advance when the tower unit components are assembled on the ground according to the calculated anchoring positions. For example, the side cable wind anchors are bolted to the outer flange plates of the steel tower columns in advance, the waist cable wind anchors are inserted between the inner and outer flange plates of the steel tower columns in advance for bolting, and the top cable wind anchors are welded to the outer wall steel plates of the tower top box girder in advance.

[0019] Step 3, installing the tower wind cable system during the tower installation process; After the pre-buried tensioning end universal joint anchor point and tower cable wind anchor device are constructed in advance, the wind cable system is installed simultaneously when the steel tower is installed to the installation height of each wind cable system; the anchor end is lifted by a tower crane to the pin ears of each cable wind anchor device of the steel tower and anchored, and the tensioning ends of the cables at the front, rear and sides of the tower are anchored on the pre-buried cable wind rope anchor points respectively.

[0020] Step 4, the tower wind cable system is tensioned step by step; After the installation of the tower wind cable system is completed, the cable wind rope is tensioned step by step at the cable wind tensioning end. The tensioning force adopts five-level tensioning, and each level of tensioning force is controlled at 20%, namely 20%, 40%, 60%, 80%, and 100%. The porous anchor set at the tensioning end of the cable wind rope is used, and the through-hole jack is used to tension the whole bundle symmetrically step by step at the anchor head; during the cable wind tensioning process, the displacement of the top of the tower is used for control, and the displacement of the top of the tower should be monitored throughout the process. It is required that the tower top deviation caused by tensioning at both ends does not exceed the allowable value of the specification. If an over-limit phenomenon is found, an instruction to stop tensioning should be issued in time, and the next construction can be carried out only after the cause is found.

[0021] Step 5: During the tower dismantling process, the wind cable system is released and dismantled step by step; During the dismantling of the steel tower, the tower is dismantled to the corresponding height of the wind cable system. First, the wind rope is tensioned step by step according to the designed cable tension. The tension is released in four stages, and the wind rope tension is released to 25%, 50%, 75% and 100% of the designed value in turn, and the wind rope is tensioned symmetrically at the anchor head by using a jack; after the reserved length is released, the winch is used in conjunction with the pulley group to withdraw the entire bundle of wind ropes from the anchor; then the side anchor head of the wind tower is tied to the tower crane lifting point, and then the tower crane lifting point is pre-tightened, the tower wind anchor head is removed, and then the wind anchor head is lowered to the ground using the lifting point; it is worth noting that in order to ensure the stability of the steel tower after the tower top wind rope is removed, a temporary wind rope needs to be set on the tower. Only after all the temporary wind ropes are pulled can the waist wind rope and side wind rope be officially tensioned. The temporary wind ropes are gradually removed as the tower column rods are removed.

[0022] Due to the adoption of the above technology, the present invention has the following beneficial effects: 1. This technology combines the design features of wind cable systems such as large round tube towers, Wansheng rod towers, and modular towers, and tailors a new type of cable wind connection structure suitable for main buckle integrated steel towers according to the structural characteristics of the main buckle integrated H-shaped steel tower, which is used in conjunction with the H-shaped steel tower. The wind cable system has been rigorously calculated and designed. The Mises stress of the tower side cable wind buckle hanging connection structure, the tower waist cable wind buckle hanging connection structure, and the tower top cable wind buckle hanging connection structure is relatively small, and the crack control calculation is also within the allowable value. The structure is clearly stressed and uses a small amount of steel, which can ensure a stable connection between the cable wind and the tower, and can also ensure the stability of the steel tower during operation.

[0023] 2. The adjustable main buckle-integrated steel tower cable wind connection structure is a new tower cable wind connection structure with simple structure, safety and reliability, and adjustable cable wind rope angle. The angle of the cable wind rope in space is adjusted by the mutual rotation of the first hinge axis and the second hinge axis, which reduces the phenomenon of repeated pulling of the cable wind rope when the steel tower is subjected to unbalanced force, causing the connection at both ends to be damaged by pulling and breaking.

[0024] 3. During construction, the cable wind anchor device can be fixed on the steel tower in advance before the steel tower is installed. During installation, you only need to align the hole position of the cable wind connection structure with the hole position of the H-shaped steel wing plate and tighten it with high-strength bolts. Later, when installing at high altitude, you only need to insert the pin shaft to install the tower wind cable system, and the same is true for the removal of the wind cable system. Practice has proved that this new set of adjustable main buckle integrated steel tower cable wind system is easy to install and disassemble, can improve construction efficiency, can ensure that the displacement of the steel tower is within the allowable range during operation, and reduce the construction safety risks of tower cable hoisting and inclined buckle hanging operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the connection structure between the tower side cable wind buckle hanging connection structure and the steel tower frame; Figure 2 It is a schematic diagram of the connection structure between the tower waist, the tower top cable wind connection structure and the steel tower frame; Figure 3 It is a schematic diagram of the plane connection structure of the tower side cable wind buckle hanging connection structure; Figure 4 It is a schematic diagram of the three-dimensional connection structure of the tower side cable wind buckle hanging connection structure; Figure 5 It is a schematic diagram of the plane connection structure of the tower waist cable wind buckle hanging connection structure; Figure 6 It is a structural schematic diagram of the tower waist cable wind buckle hanging connection structure; Figure 7 It is a schematic diagram of the three-dimensional connection structure of the tower waist cable wind buckle hanging connection structure; Figure 8 It is a schematic diagram of the plane connection structure of the tower top cable wind buckle hanging connection structure; Fig. 9 It is a schematic diagram of the three-dimensional connection structure of the tower top cable wind buckle hanging connection structure; Fig.10 It is a schematic diagram of the connection structure of the cable wind anchor; The names of the parts corresponding to the serial numbers in the figure are: 1. Tower side cable wind buckle hanging connection structure, 2. Tower waist cable wind hanging connection structure, 3. Tower top cable wind connection structure, 4. Side cable wind rope, 5. Waist cable wind rope, 6. Top cable wind rope, 7. Cable wind anchor, 8. H-shaped steel column, 801, inner flange plate, 802, outer flange plate, 9. Tower top box beam, 10. First anchor end, 11. First hinge axis, 12. Second anchor end, 13. Second hinge axis, 14. Side cable wind anchor device, 1401, side cable wind connection ear plate, 1402, side cable wind stiffening plate, 14 03. Side cable wind connection seat plate, 1404. Side cable wind high-strength bolts, 15. Waist cable wind anchoring device, 1501. Waist cable wind connection ear plate, 1502. Waist cable wind diaphragm, 1503. Waist cable wind connection seat plate, 1504. Waist cable wind inner plug-in plate, 1505. Waist cable wind outer stiffening plate, 1506. Waist cable wind inner stiffening plate, 1507. Waist cable wind high-strength bolts, 16. Top cable wind anchoring device, 1601. Top cable wind connection ear plate, 1602. Top cable wind diaphragm, 17. Tensioning end universal joint. DETAILED DESCRIPTION

[0026] The technical solutions in the invention are clearly and completely described below in conjunction with the embodiments. The described embodiments are only a part of the present invention, rather than all the embodiments. Example

[0027] An adjustable main-buckle-in-one steel tower cable wind connection structure, which includes a tower side cable wind buckle hanging connection structure 1, a tower waist cable wind hanging connection structure 2 and a tower top cable wind connection structure 3; the tower side cable wind buckle hanging connection structure 1 includes a side cable wind rope 4, a side cable wind anchoring device 14, a first anchoring end 10, a first hinged shaft 11, a second anchoring end 12, a second hinged shaft 13, a tensioning end universal joint 17 and a cable wind ground anchor 7, one end of the side cable wind rope 4 is riveted to the cable wind ground anchor 7 through the tensioning end universal joint 17, the other end of the side cable wind rope 4 is riveted to the first anchoring end 10, the first anchoring end 10 and the second anchoring end 12 are hinged through the first hinged shaft 11, the second anchoring end 12 is connected to the side cable wind anchoring device 14 through the second hinged shaft 13, the side cable wind angle can be flexibly adjusted, and the side cable wind anchoring device 14 is bolted to the outer flange plate 802 of the H-shaped steel column 8 of the tower.

[0028] The tower waist cable wind hanging connection structure 2 includes a waist cable wind rope 5, a waist cable wind anchoring device 15, a first anchoring end 10, a first hinged shaft 11, a second anchoring end 12, a second hinged shaft 13, a tensioning end universal joint 17 and a cable wind ground anchor 7. One end of the waist cable wind rope 5 is riveted to the cable wind ground anchor 7 through the tensioning end universal joint 17, and the other end of the waist cable wind rope 5 is riveted to the first anchoring end 10. The first anchoring end 10 and the second anchoring end 12 are hinged through the first hinged shaft 11, and the second anchoring end 12 is connected to the waist cable wind anchoring device 15 through the second hinged shaft 13. The waist cable wind anchoring device 15 is connected and installed between the inner flange plate 801 and the outer flange plate 802 of the H-shaped steel column 8 of the tower frame through the waist cable wind high-strength bolts 1507.

[0029] The tower top wind cable connection structure 3 includes a top wind cable 6, a top wind cable anchor device 16, a first anchor end 10, a first hinge shaft 11, a second anchor end 12, a second hinge shaft 13, a tensioning end universal joint 17 and a wind cable ground anchor 7. One end of the top wind cable 6 is connected to the wind cable ground anchor 7 through the tensioning end universal joint 17, the other end of the top wind cable 6 is riveted to the first anchor end 10, the first anchor end 10 is hinged to the second anchor end 12 through the first hinge shaft 11, the second anchor end 12 is connected to the top wind cable anchor device 16 through the second hinge shaft 13, and the top wind cable anchor device 16 is welded to the outer wall steel plate of the tower top box beam 9. The above-mentioned tensioning end universal joint is provided with a pre-buried hole, and the anchor steel bar passes through the pre-buried hole and is bonded and anchored to the contact interface of the wind cable ground anchor, so that stress transfer can be achieved between the tensioning end universal joint and the wind cable ground anchor concrete.

[0030] The side cable wind anchoring device 14 comprises a side cable wind connection ear plate 1401 and a side cable wind connection seat plate 1403. The side cable wind connection ear plate 1401 is fixedly connected to the center line position of one side of the side cable wind connection seat plate 1403. The side cable wind connection ear plate 1401 is provided with a hinge hole for hingedly connecting to the second anchoring end 12 through the second hinge shaft 13. The side cable wind connection seat plate 1403 on both sides of the side cable wind connection ear plate 1401 is provided with bolt holes for bolting to the outer flange plate 802 of the H-shaped steel column 8 of the tower through side cable wind high-strength bolts 1404. After the other side of the side cable wind connection seat plate 1403 is fitted with the outer flange plate 802 of the H-shaped steel column 8, it is bolted through the side cable wind high-strength bolts 1404.

[0031] Both sides of the side cable wind connection ear plate 1401 are reinforced and connected to the side cable wind connection seat plate 1403 through the side cable wind stiffening plate 1402 respectively.

[0032] The waist cable wind anchoring device 15 includes a waist cable wind connection seat plate 1503, one side of the waist cable wind connection seat plate 1503 is fixedly connected with two parallel waist cable wind connection ear plates 1501 for being hinged to the second anchoring end 12 through the second hinge shaft 13, and the waist cable wind connection ear plates 1501 are provided with hinge holes, and the other side of the waist cable wind connection seat plate 1503 is fixed with two parallel waist cable wind inner plug-in plates 1504 for being inserted between the inner flange plate 801 and the outer flange plate 802 of the H-shaped steel column 8 of the tower, and the waist cable wind inner plug-in plates 1504 are provided with bolt holes for bolting with the inner flange plate 801 and the outer flange plate 802, and the waist cable wind inner plug-in plates 1504 are bolted with the inner flange plate 801 and the outer flange plate 802 through waist cable wind high-strength bolts 1507.

[0033] A waist cable wind transverse partition plate 1502 is respectively arranged between the two parallel waist cable wind connecting ear plates 1501 and between the two parallel waist cable wind inner plug-in plates 1504.

[0034] The waist cable wind connection ear plate 1501 and the waist cable wind connection seat plate 1503 are further reinforced with a waist cable wind outer side stiffening plate 1505 .

[0035] The waist cable wind inner plug-in plate 1504 and the waist cable wind connection seat plate 1503 are further reinforced with a waist cable wind inner side stiffening plate 1506 to enhance the lateral restraint and overall bearing capacity of the waist cable wind connection ear plate and the waist cable wind inner plug-in plate.

[0036] The top cable wind anchor device 16 comprises two parallel top cable wind connection ear plates 1601, and top cable wind cross partitions 1602 are respectively arranged at the upper end, middle part and lower end between the two parallel top cable wind connection ear plates 1601. Two sets of hinge holes for hinge connection with the second anchor end 12 through the second hinge shaft 13 are arranged on the two parallel top cable wind connection ear plates 1601. Single or multiple top cable wind ropes 6 can be arranged according to the wind force of the tower top cable. The sides of the two parallel top cable wind connection ear plates 1601 away from the top cable wind ropes 6 are welded to the outer wall steel plate of the tower top box beam 9. The connection ear plates of the side cable wind anchor device are of a single-piece structure, and the connection ear plates of the waist cable wind anchor device and the top cable wind anchor device are of a double-piece structure. Each bundle of side cable wind ropes, waist cable wind ropes and top cable wind ropes is composed of several steel strands, and the group anchor method is used to tension and relax the whole bundle step by step. Before the cable wind ropes are tensioned and relaxed, the relocation winch and jack should be maintained and inspected before use to ensure that all performance of the equipment is in the best condition; when the side cable wind ropes, waist cable wind ropes and top cable wind ropes are tensioned and relaxed, the steel tower frame will slowly deviate. The surveyor needs to observe the tower deviation during the construction period and determine the tensioning and relaxation of the cable wind ropes based on the measurement data, so as to ensure that the tower deviation of the steel tower frame is within the allowable value.

[0037] The construction method of the adjustable main buckle-integrated steel tower cable wind connection structure comprises the following steps: Step 1, force calculation of steel tower wind cable system; According to the unbalanced horizontal force generated by the load-bearing cables, buckle cables, balance cables, etc. on the tower during the installation of the main bridge, the force calculation of the steel tower wind cable system is carried out, including the foundation bearing capacity, shear state, passive earth pressure and stability calculation of the cable wind anchor 7, the anti-sliding safety factor, the anti-overturning safety factor, and the anti-pullout safety factor; the tensioning force calculation of the side cable wind rope 4, the waist cable wind rope 5 and the top cable wind rope 6; the Mises stress and crack calculation of the tower side cable wind buckle connection structure 1, the tower waist cable wind hanging connection structure 2, the tower top cable wind connection structure 3 and the tensioning end universal joint 17. The finite element software should be used for detailed structure verification of the tower cable wind anchorage end and the tensioning end. The most unfavorable load condition takes the most unfavorable angle and load that the tower cable wind can adjust.

[0038] Step 2: Install the tower cable wind anchor device and the tensioning end before installing the tower; The cable wind anchors 7 for the waist cable wind and top cable wind are arranged in the front and rear positions of the tower, and the cable wind anchors 7 for the side cable wind are arranged on both sides of the tower. The basic structure dimensions of the cable wind anchor 7 are designed based on the calculation results, and the position of the cable wind ground anchor is determined according to the actual terrain on site. The tensioning end universal joint 17 of the tensioning end of the cable wind rope should be pre-buried in advance before the pouring of the cable wind anchor 7; the side cable wind anchor 14, waist cable wind anchor 15 and top cable wind anchor 16 of the steel tower are installed in advance when the tower unit components are assembled on the ground according to the calculated anchoring positions, such as the side cable wind anchor 14 is bolted to the outer flange plate 802 of the steel tower column in advance, the waist cable wind anchor 15 is inserted in advance between the inner and outer flange plates 802 of the steel tower column for bolting, and the top cable wind anchor 16 is welded to the outer wall steel plate of the tower top box girder 9 in advance. Step 3, installing the tower wind cable system during the tower installation process; After the pre-buried tensioning end universal joint 17 anchor point and tower cable wind anchor device are constructed in advance, when the steel tower is installed to the installation height of each wind cable system, the wind cable system is installed simultaneously; the anchor end is lifted by a tower crane to the pin ears of each cable wind anchor device of the steel tower and anchored, and the tensioning ends of the cables at the front, rear and both sides of the tower are anchored on the pre-buried cable wind rope anchor points respectively.

[0039] Step 4, the tower wind cable system is tensioned step by step; After the installation of the tower wind cable system is completed, the cable wind rope is tensioned step by step at the cable wind tensioning end. The tensioning force adopts five-level tensioning, and each level of tensioning force is controlled at 20%, namely 20%, 40%, 60%, 80%, and 100%. The porous anchor set at the tensioning end of the cable wind rope is used, and the through-hole jack is used to tension the whole bundle symmetrically step by step at the anchor head; during the cable wind tensioning process, the displacement of the top of the tower is used for control, and the displacement of the top of the tower should be monitored throughout the process. It is required that the tower top deviation caused by tensioning at both ends does not exceed the allowable value of the specification. If an over-limit phenomenon is found, an instruction to stop tensioning should be issued in time, and the next construction can be carried out only after the cause is found.

[0040] Step 5: During the tower dismantling process, the wind cable system is released and dismantled step by step; During the dismantling of the steel tower, the tower is dismantled to the corresponding height of the wind cable system. First, the wind rope is tensioned step by step according to the designed cable tension. The tension is released in four stages, and the wind rope tension is released to 25%, 50%, 75% and 100% of the designed value in turn, and the wind rope is tensioned symmetrically at the anchor head by using a jack; after the reserved length is released, the winch is used in conjunction with the pulley group to withdraw the entire bundle of wind ropes from the anchor; then the side anchor head of the wind tower is tied to the tower crane lifting point, and then the tower crane lifting point is pre-tightened, the tower wind anchor head is removed, and then the wind anchor head is lowered to the ground using the lifting point; it is worth noting that in order to ensure the stability of the steel tower after the tower top wind rope 6 is removed, a temporary wind rope needs to be set for the tower. Only after all the temporary wind ropes are pulled can the waist wind rope 5 and the side wind rope 4 be officially tensioned. The temporary wind ropes are gradually removed as the tower column rods are removed.

[0041] The technology of this application has been applied in a steel tube concrete arch bridge, and the height of the main buckle steel tower of the cable hoisting system is 84m. According to the calculation results of the tower wind cable system, the design adopts a layer of waist cable wind and a layer of top cable wind in the longitudinal direction, and a layer of side cable wind in the transverse direction. The cable wind rope adopts 1860MPa Φ15.2mm high-strength low-relaxation steel strand. Two bundles of cable wind are arranged at the rear of the single column head tower top, and the number of cable winds in each bundle is combined into 8+8, for a total of 16; two bundles of cable wind are arranged at the front of the tower top, and the number of cable winds in each bundle is combined into 6+6, for a total of 12; two bundles of waist cable wind are arranged, with 4 cables in each bundle, for a total of 8.

[0042] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. An adjustable main buckle integrated steel tower cable wind connection structure, characterized in that: The invention comprises a tower side cable wind buckle connection structure (1), a tower waist cable wind buckle connection structure (2) and a tower top cable wind connection structure (3); the tower side cable wind buckle connection structure (1) comprises a side cable wind rope (4), a side cable wind anchoring device (14), a first anchoring end (10), a first hinged shaft (11), a second anchoring end (12), a second hinged shaft (13), a tensioning end universal joint (17) and a cable wind ground anchor (7); one end of the side cable wind rope (4) is connected to the side cable wind rope by a cable wind anchoring device (14); The tensioning end universal joint (17) is connected to the cable wind anchor (7), the other end of the side cable wind rope (4) is riveted to the first anchor end (10), the first anchor end (10) and the second anchor end (12) are hinged via a first hinge shaft (11), the second anchor end (12) and the side cable wind anchor device (14) are connected via a second hinge shaft (13), and the side cable wind anchor device (14) is bolted to the outer flange plate (802) of the H-shaped steel column (8) of the tower; The tower waist cable wind hanging connection structure (2) comprises a waist cable wind rope (5), a waist cable wind anchoring device (15), a first anchoring end (10), a first hinged shaft (11), a second anchoring end (12), a second hinged shaft (13), a tensioning end universal joint (17) and a cable wind ground anchor (7), wherein one end of the waist cable wind rope (5) is connected to the cable wind ground anchor (7) via the tensioning end universal joint (17), and the other end of the waist cable wind rope (5) is connected to the first anchoring end (12), and the second hinged shaft (13) is connected to the first anchoring end (10). The anchoring end (10) is riveted, the first anchoring end (10) and the second anchoring end (12) are hinged via a first hinge shaft (11), the second anchoring end (12) and the waist cable wind anchoring device (15) are connected via a second hinge shaft (13), and the waist cable wind anchoring device (15) is connected and installed between the inner flange plate (801) and the outer flange plate (802) of the H-shaped steel column (8) of the tower frame via waist cable wind high-strength bolts (1507); The tower top wind cable connection structure (3) comprises a top wind cable (6), a top wind cable anchoring device (16), a first anchoring end (10), a first hinged shaft (11), a second anchoring end (12), a second hinged shaft (13), a tensioning end universal joint (17) and a wind cable ground anchor (7); one end of the top wind cable (6) is connected to the wind cable ground anchor (7) via the tensioning end universal joint (17); the other end of the top wind cable (6) is riveted to the first anchoring end (10); the first anchoring end (10) and the second anchoring end (12) are hinged via the first hinged shaft (11); the second anchoring end (12) and the top wind cable anchoring device (16) are connected via the second hinged shaft (13); and the top wind cable anchoring device (16) is welded to the outer wall steel plate of the tower top box girder (9).

2. The adjustable main buckle integrated steel tower cable wind connection structure according to claim 1 is characterized in that: The side cable wind anchoring device (14) comprises a side cable wind connection ear plate (1401) and a side cable wind connection seat plate (1403); the side cable wind connection ear plate (1401) is fixedly connected to the center line position of one side of the side cable wind connection seat plate (1403); the side cable wind connection ear plate (1401) is provided with a hinge hole for hinged connection with the second anchoring end (12) through a second hinge shaft (13); the side cable wind connection seat plate (1403) on both sides of the side cable wind connection ear plate (1401) is provided with bolt holes for bolting with the outer flange plate (802) of the H-shaped steel column (8) of the tower through the side cable wind high-strength bolts (1404); the other side of the side cable wind connection seat plate (1403) is bolted with the outer flange plate (802) of the H-shaped steel column (8) through the side cable wind high-strength bolts (1404).

3. The adjustable main buckle integrated steel tower cable wind connection structure according to claim 2 is characterized in that: Both sides of the side cable wind connection ear plate (1401) are reinforced and connected to the side cable wind connection seat plate (1403) via the side cable wind stiffening plates (1402) respectively.

4. The adjustable main buckle integrated steel tower cable wind connection structure according to claim 1 is characterized in that: The waist cable wind anchoring device (15) comprises a waist cable wind connection seat plate (1503), one side of the waist cable wind connection seat plate (1503) is fixedly connected with two parallel waist cable wind connection ear plates (1501) for being hinged to the second anchoring end (12) via a second hinge shaft (13), the waist cable wind connection ear plates (1501) are provided with hinge holes, and the other side of the waist cable wind connection seat plate (1503) is fixed with an H-shaped steel for inserting into the tower frame. Two parallel waist cable wind inner plug-in plates (1504) are provided between the inner flange plate (801) and the outer flange plate (802) of the column (8). Bolt holes for bolting to the inner flange plate (801) and the outer flange plate (802) are provided on the waist cable wind inner plug-in plates (1504). The waist cable wind inner plug-in plates (1504) are bolted to the inner flange plate (801) and the outer flange plate (802) by waist cable wind high-strength bolts (1507).

5. The adjustable main buckle integrated steel tower cable wind connection structure according to claim 4 is characterized in that: A waist cable wind transverse partition plate (1502) is arranged between the two parallel waist cable wind connection ear plates (1501).

6. The adjustable main buckle integrated steel tower cable wind connection structure according to claim 4 or 5, characterized in that: The waist cable wind connection ear plate (1501) and the waist cable wind connection seat plate (1503) are further reinforced and connected with a waist cable wind outer side stiffening plate (1505).

7. The adjustable main buckle integrated steel tower cable wind connection structure according to claim 4 is characterized in that: The waist cable wind inner plug-in plate (1504) and the waist cable wind connecting seat plate (1503) are further reinforced and connected with a waist cable wind inner side stiffening plate (1506).

8. The adjustable main buckle integrated steel tower cable wind connection structure according to claim 1, characterized in that: The top cable wind anchoring device (16) comprises two parallel top cable wind connection ear plates (1601), top cable wind cross partitions (1602) are respectively arranged at the upper end, middle part and lower end positions between the two parallel top cable wind connection ear plates (1601), two groups of hinge holes for hinged connection with the second anchoring end (12) through the second hinge shaft (13) are arranged on the two parallel top cable wind connection ear plates (1601), and the sides of the two parallel top cable wind connection ear plates (1601) away from the top cable wind rope (6) are welded to the outer wall steel plate of the tower top box girder (9).

9. The adjustable main buckle integrated steel tower cable wind connection structure according to claim 1, characterized in that: The construction method of the adjustable main buckle-integrated steel tower cable wind connection structure comprises the following steps: Step 1, force calculation of steel tower wind cable system; Based on the unbalanced horizontal force generated by the load-bearing cables, buckle cables, balance cables, etc. on the tower during the installation of the main bridge, the force calculation of the steel tower wind cable system is carried out, including the foundation bearing capacity, shear state, passive earth pressure and stability calculation (anti-sliding safety factor, anti-overturning safety factor, anti-pulling safety factor) of the cable wind anchor (7); the tension force calculation of the side cable wind rope (4), waist cable wind rope (5) and top cable wind rope (6); the Mises stress and crack calculation of the tower side cable wind buckle connection structure (1), the tower waist cable wind hanging connection structure (2), the tower top cable wind connection structure (3) and the tension end universal joint (17). Finite element software should be used to perform detailed structural verification on the tower cable wind anchor end and the tension end. The most unfavorable load condition takes the most unfavorable angle and load that the tower cable wind can adjust; Step 2: Install the tower cable wind anchor device and the tensioning end before installing the tower; The cable wind anchors (7) for the waist and top cable winds are arranged at the front and rear positions of the tower frame, and the cable wind anchors (7) for the side cable winds are arranged at the sides of the tower frame. Based on the calculation results, the basic structure dimensions of the cable wind anchors (7) are designed, and the positions of the cable wind ground anchors are determined according to the actual terrain on site. The tensioning end universal joint (17) of the tensioning end of the cable wind rope should be pre-buried before the cable wind anchors (7) are cast. The cable wind anchoring devices (side cable wind anchoring devices (14), waist and side cable wind anchoring devices (15)) on the steel tower frame are pre-buried. The cable wind anchor device (15) and the top cable wind anchor device (16) are installed in advance when the tower frame unit components are assembled on the ground according to the calculated anchoring positions. For example, the side cable wind anchor device (14) is bolted to the outer flange plate (802) of the steel tower frame column in advance, the waist cable wind anchor device (15) is inserted between the inner and outer flange plates (802) of the steel tower frame column in advance for bolting, and the top cable wind anchor device (16) is welded to the outer wall steel plate of the tower top box beam (9) in advance; Step 3, installing the tower wind cable system during the tower installation process; After the pre-buried tensioning end universal joint (17) anchor point and tower cable wind anchor device are constructed in advance, when the steel tower is installed to the installation height of each wind cable system, the wind cable system is installed simultaneously; the anchor end is lifted to the pin ear of each wind cable anchor device of the steel tower by a tower crane and anchored, and the tensioning ends of the wind cables (4) at the front and rear and both sides of the tower are respectively anchored to the pre-buried wind cable anchor points; Step 4, the tower wind cable system is tensioned step by step; After the installation of the tower wind cable system is completed, the wind rope is tensioned step by step at the wind cable tensioning end. The tensioning force adopts five levels, and each level of tensioning force is controlled at 20%, namely 20%, 40%, 60%, 80%, and 100%. The multi-hole anchor set at the wind rope tensioning end is used, and the through-hole jack is used to tension the whole bundle symmetrically step by step at the anchor head; during the wind cable tensioning process, the displacement of the top of the tower is controlled, and the displacement of the top of the tower should be monitored throughout the process. It is required that the displacement of the tower top caused by tensioning at both ends does not exceed the allowable value of the specification. If an over-limit phenomenon is found, an instruction to stop tensioning should be issued in time, and the next step of construction can be carried out after the cause is found out; Step 5: During the tower dismantling process, the wind cable system is released and dismantled step by step; During the dismantling process of the steel tower, the tower is dismantled to the corresponding height of the wind cable system. First, the cable wind rope is tensioned step by step according to the designed cable tension. The tension is released in four stages, and the cable wind rope tension is released to 25%, 50%, 75% and 100% of the designed tension value in turn, and the cable wind rope is tensioned symmetrically at the anchor head by using a jack; after the reserved length is loosened, the winch is used in conjunction with the pulley group to withdraw the entire bundle of cable wind ropes from the anchor; then the side anchor head of the cable wind tower is tied to the tower crane lifting point, and then the tower crane lifting point is pre-tightened, the tower cable wind anchor head is removed, and then the cable wind anchor head is lowered to the ground using the lifting point.

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