Construction method for large-span structure with rigid-flexible parallel connection

Abstract

The present invention belongs to the technical field of building construction, and discloses a construction method for a large-span structure with a rigid-flexible parallel connection. By compensating for the deformation difference of the truss structure, the truss structure coincides with the zero-stress state after being installed at high altitude, and theoretically coincides with the designed state after all additional structures are installed. To make up for the difference between theory and practice, the configuration of the connection components is finely adjusted in the horizontal and vertical directions to enable the rigid-flexible parallel structure to reach the designed state and control the deformation difference of the rigid-flexible parallel structure. The cable group tensioning is completed through the cooperation of the first tensioning unit and the second tensioning unit, and the simultaneous arrival of the cable shapes of all the cables can be realized, ensuring that the cable shapes of the cables in the cable group are consistent. The anti-tilting device is connected between the connection component and the cable group, and can balance the eccentric moment on the cable group to avoid the deflection deformation of the cable group. The first position fine-tuning device can adjust the position of the enclosure system to ensure the flatness of the overall strip structure, and the ideal mass can be achieved by adjusting the TMD through the mass regulator to ensure the vibration reduction performance of the TMD.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a construction method for a long-span structure with a rigid-flexible parallel connection. Background Art

[0002] The long-span structure includes a span structure with a rigid-flexible parallel connection and a connection component installed on the rigid-flexible parallel span structure. The rigid-flexible parallel span structure includes a rigid truss mechanism and a flexible cable structure. The cable structure includes a plurality of cable groups arranged side by side. During construction, first, two rigid truss structures are constructed at the side span positions between two end main structures, and then the cable structure is constructed between the two truss structures. After the cable structure construction is completed, the construction of auxiliary functional components is carried out. Among them, adjacent cable groups and the cable groups and the truss structure are all connected through connection components, and finally a cable net structure is formed between the two truss structures.

[0003] In existing projects, there is no case of a parallel connection of a rigid truss structure and a flexible cable group. When a rigid structure and a flexible structure are connected in parallel, due to the small deformation of the rigid structure and the large deformation of the flexible structure, a large morphological difference will be caused, and it is difficult to match after construction. On this basis, for the flexible cable structure, the existing cable tensioning process and equipment are difficult to meet the construction requirements of synchronous tensioning of multiple cables in the cable group; for the connection components between adjacent cable groups and between the cable groups and the truss structure, their installation will cause off-axis torsion of the cable group. In the prior art, a balance counterweight is usually hung to solve this problem, which increases the construction cost and has the safety hazard of hanging a counterweight at high altitude. To sum up, there are problems of poor construction quality, high construction cost and risk in constructing the above long-span structure by the existing construction method. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction method for a long-span structure with a rigid-flexible parallel connection, which can reduce the construction cost and risk and effectively improve the construction quality of the long-span structure.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Provide a construction method for a long-span structure with a rigid-flexible parallel connection. The long-span structure includes a rigid-flexible parallel structure and a strip structure. The rigid-flexible parallel structure includes a truss structure and a cable structure. The cable structure includes a plurality of cable groups arranged side by side. The strip structure includes a plurality of connection components connected in series. The construction method for the long-span structure with a rigid-flexible parallel connection includes:

[0007] S1. Construct the rigid-flexible parallel structure;

[0008] S2. Construct the strip structure;

[0009] Step S1 includes:

[0010] S11. Establish a simulation model of the rigid-flexible parallel structure, refine the rigid-flexible parallel structure, all additional structures installed thereon, and the connection nodes between components according to the design construction drawings, and clarify the actual magnitudes and distributions of all dead loads on the rigid-flexible parallel structure;

[0011] S12. Taking the rigid-flexible parallel structure reaching the design configuration under dead load as the goal, determine the zero-stress configuration of the truss structure through iterative form-finding analysis method;

[0012] There are vertical deformation differences ΔZ, horizontal deformation differences ΔY, and axial deformation differences ΔX between the zero-stress configuration and the design configuration of the truss structure;

[0013] S13. Compensate the vertical deformation difference ΔZ, the horizontal deformation difference ΔY of the truss structure, and selectively compensate the axial deformation difference ΔX, so that the truss structure fits the zero-stress configuration, and hoist the compensated truss structure in place at high altitude;

[0014] S14. Hoist the non-tension end of the cable group in place, use the first tensioning unit to tow the tensioning end of the cable group to complete the preset tensioning stroke, and then finely adjust the cable shape of each cable in the cable group and tension it in place through the second tensioning unit;

[0015] S15. Repeat step S14 to install and tension all cable groups of the cable structure in place;

[0016] Step S2 includes:

[0017] S21. Assemble the integral connection component in the factory;

[0018] The connection component includes a connection rod, a TMD arranged on the connection rod, and an enclosure system surrounding the connection rod. A mass regulator is arranged on the TMD, and a first position fine-tuning device is connected between the enclosure system and the connection rod;

[0019] S22. Install the connection component between the cable clips of two adjacent cable groups;

[0020] S23. Install the anti-tilting device, which is connected between the connection component and the cable clip to prevent the cable group from tilting; after the connection components symmetrically arranged on both sides of the same cable clip are all installed in place, remove the anti-tilting device on the first installed connection component, and there is no need to install the anti-tilting device between the later installed connection component and this cable clip;

[0021] S24. After the connection components on adjacent multiple cable groups are installed, adjust the horizontal position and vertical position of the enclosure system relative to the connection rod through the first position fine-tuning device, so that the corresponding multiple enclosure systems are flush;

[0022] S25, constructing a gap-filling section between two adjacent connection components;

[0023] S26, fine-tuning the mass of the TMD to an ideal mass by the mass adjuster;

[0024] S27. Finely adjust the position of the connecting component relative to the cable structure and the truss structure in the horizontal and vertical directions so that the rigid-flexible parallel structure reaches the designed shape.

[0025] As a preferred solution of the rigid-flexible parallel large-span structure construction method provided by the present invention, step S13 includes:

[0026] S131. Based on the horizontal coordinates of the design and construction drawing and the vertical coordinates of the zero-stress form, or based on the horizontal coordinates of the design and construction drawing and the vertical and axial coordinates of the zero-stress form, perform a detailed design of the truss structure, and issue a detailed drawing accordingly to guide the factory in fabricating the truss sections of the truss structure to compensate for the vertical deformation difference ΔZ or to compensate for the combined vertical deformation difference ΔZ and the axial deformation difference ΔX.

[0027] S132. Compensating the horizontal deformation difference ΔY of the truss structure: transporting the truss segments processed in the factory to the construction site for assembly. During assembly, horizontal coordinate compensation is performed on the connection points between the truss segments according to the zero stress form, so that the assembled truss structure matches the zero stress form.

[0028] As a preferred embodiment of the rigid-flexible parallel large-span structure construction method provided by the present invention, in step S27, the connection component between the truss structure and the cable structure is a side span connection component, and the side span connection component includes a length-adjustable segment, and the length-adjustable segment is used to compensate for the horizontal coordinate difference of the rigid-flexible parallel structure;

[0029] A vertically adjustable structure is provided at the connection node between the side span connection assembly and the truss structure, and the vertically adjustable structure is used to compensate for the vertical coordinate difference of the rigid-flexible parallel structure.

[0030] As a preferred solution of the rigid-flexible parallel large-span structure construction method provided by the present invention, the connecting rod of the side span connecting assembly is connected to a connecting head through the length-adjustable section, the vertically adjustable structure includes a truss plate arranged on the truss structure, a first strip hole and a second strip hole are opened on the truss plate in the vertical direction, the truss plate is clamped between the two ear plates of the connecting head, and a connecting plate is provided on the two sides of the two ear plates facing away from each other, a pin shaft passes through the two connecting plates, the two ear plates and the first strip hole, and a fastener passes through the two connecting plates and the second strip hole, so that the force of the connecting rod is transmitted to the connecting plate through the pin shaft, and the connecting plate is in friction contact with the truss plate;

[0031] A friction-reducing positioning plate is sandwiched between the two ear plates and the corresponding connecting plate, and the pin shaft passes through the friction-reducing positioning plate;

[0032] A destructible element is sandwiched between the two connecting plates and the truss plate, and the fastener passes through the destructible element.

[0033] As a preferred embodiment of the rigid-flexible parallel large-span structure construction method provided by the present invention, in step S14, the multiple cables of the cable group are connected by a tensioning tool. Each of the cables includes a cable body and a cable head provided at the end of the cable body. The end main body structure is provided with a plurality of connecting ear plates corresponding to the cables one by one. The connecting ear plates are used to connect to the cable heads after the corresponding cables are tensioned into place. The tensioning tool is located on the side of the cable head facing away from the connecting ear plates.

[0034] The first tensioning unit includes a winding device, on which a steel wire rope is wound, and the steel wire rope is connected to the tensioning tool, and the winding device tensions the cable group by winding and unwinding the steel wire rope;

[0035] The second tensioning unit includes a bidirectional lifting device and a retractable adjustment device. The bidirectional lifting device is installed on the end main structure and connected to the tensioning tooling. The tensioning tooling is provided with an adjustment device corresponding to each of the cables, and the retractable end of the adjustment device is connected to the cable head.

[0036] As a preferred solution of the rigid-flexible parallel large-span structure construction method provided by the present invention, step S14 includes:

[0037] S141, the tensioning tool, the first tensioning unit, and the second tensioning unit are installed in place;

[0038] S142, starting the winding device to pull the cable assembly close to the connecting lug plate through the steel wire rope;

[0039] S143. When the cable head of the cable approaches the connecting ear plate, the winding device stops operating and is locked by the safety locking device;

[0040] S144. Connect the two-way lifting device and the tensioning tooling;

[0041] S145. Start the two-way lifting device to gradually transfer the tensile force to the two-way lifting device;

[0042] S146. Adjust the cable head so that it can smoothly enter the connecting ear plate;

[0043] S147. After the cable shape of any one of the cables in the cable group is in place, drive the cable shapes of the remaining cables in place through the adjusting device;

[0044] S148. Record the distance between the pin holes on the cable head of each cable and the corresponding pin holes on the connecting ear plate as the cable length adjustment amount of the cable;

[0045] S149. Fine-tune each cable according to the cable length adjustment amount;

[0046] S1410. After the cable length adjustment of all the cables is completed, continue to tension through the two-way lifting device and the adjusting device. After the pin holes on the cable head are aligned with the corresponding pin holes on the connecting ear plate, install and fix the pin shaft component;

[0047] S1411. After all the cable heads are connected to the corresponding connecting ear plates through the pin shaft components, the two-way lifting device gradually unloads the tensile force to transfer the tensile force to the position of the pin shaft component;

[0048] S1412. Remove the first tensioning unit and the second tensioning unit.

[0049] As a preferred solution of the construction method for a large-span structure with a rigid-flexible parallel connection provided by the present invention, it further includes step S140: controlling the cable shape of the cable group based on the temperature sensitivity of the cable group. Step S140 includes:

[0050] S1401. The first cable group is tensioned on a cloudy day when the temperature difference does not exceed the preset range, and temperature sensors are arranged on the cable group. The cable shape is corrected according to the cable shape-temperature relationship determined by theoretical analysis;

[0051] S1402. After the first cable group is tensioned according to the corrected cable shape, at least 24 hours of real-time monitoring is carried out to obtain the measured curve of the cable shape-temperature relationship, and it is compared with the theoretical cable shape-temperature relationship. Relying on the measured and theoretical data, a cable shape-temperature mapping function is formulated, and the first cable group is finely adjusted for the second time according to the mapping function;

[0052] S1403. The cable shape of the cable group installed thereafter is tensioned based on the real-time measured cable shape of the adjacent cable group, and no real-time temperature measurement and correction is performed.

[0053] As a preferred embodiment of the rigid-flexible parallel large-span structure construction method provided by the present invention, in step S21, the mass regulator includes a liquid storage container and a liquid guide tube, one end of the liquid guide tube is connected to the liquid storage container, and the other end is connected to a suction port;

[0054] In step S25, the process further includes: constructing a flexible joint between the enclosure gap-filling section and the connecting component, wherein the suction and irrigation port is flush with the flexible joint and exposed;

[0055] In step S26, liquid is poured into or drawn out of the liquid storage container through the suction port until the TMD reaches the ideal quality.

[0056] As a preferred embodiment of the rigid-flexible parallel large-span structure construction method provided by the present invention, in step S21, the enclosure system includes an enclosure truss and an enclosure plate, the enclosure plate is covered on the outside of the enclosure truss, and the first position fine-adjustment device includes a horizontal adjustment member and a vertical adjustment member;

[0057] A support plate is provided on the connecting rod, and a load-bearing plate is provided on the support plate. The load-bearing plate includes a horizontal plate and a vertical plate connected vertically. The horizontal adjustment member is threadedly connected to the enclosure truss and can push the vertical plate along the X direction. The vertical adjustment member is threadedly connected to the enclosure truss and can push the horizontal plate vertically. The X direction is the width direction of the connecting rod.

[0058] As a preferred embodiment of the rigid-flexible parallel large-span structure construction method provided by the present invention, in step S23, the anti-tilt device includes a rigid rod, a first bolt, and a second bolt. The extension direction of the rigid rod is consistent with the extension direction of the connecting rod. The connecting rod is provided with a first connecting member, and the cable clamp is provided with a second connecting member.

[0059] The rigid rod is connected to the first connecting member via the first bolt, the axis of the first bolt is parallel to the connecting rod, a first oblong hole is formed on the rigid rod along its length, the axis of the second bolt is perpendicular to the rigid rod, and the second bolt passes through the second connecting member and the first oblong hole;

[0060] The second bolt is a friction type high-strength bolt.

[0061] Beneficial effects of the present invention:

[0062] 1) By compensating for the deformation difference of the truss structure, the truss structure coincides with the zero-stress state after high-altitude installation and before connection to the cable structure. After the installation of all additional structures is completed, it theoretically coincides with the designed state. To make up for the difference between the theoretical and actual configurations, the configurations of the connection components relative to the cable structure and the truss structure are finely adjusted in the horizontal and vertical directions, so that the rigid-flexible parallel structure reaches the designed state and the deformation difference of the rigid-flexible parallel structure is controlled.

[0063] 2) The cable group tensioning work is completed through the cooperation of the first tensioning unit and the second tensioning unit, which can realize the simultaneous arrival of the cable shapes of all cables, ensure the same cable shapes and cable forces of the cables in the cable group, and achieve the efficient fine adjustment and high-quality tensioning of the integrated cable group.

[0064] 3) Since the connection rods, TMD and the enclosure system are assembled at the factory stage to form an integrated connection component, the integrated connection component can be transported to the construction site for hoisting. Compared with the existing high-altitude installation operation method, the amount of high-altitude assembly work is reduced, the construction efficiency is improved, and the safety hazards are reduced.

[0065] 4) After the connection component is installed on the cable group, an anti-tilting device is installed at the corresponding position of the connection component. The anti-tilting device is connected between the connection component and the cable clip of the cable group to balance the eccentric moment generated on the cable group and avoid serious deflection deformation of the cable group.

[0066] 5) By setting the first position fine adjustment device, after multiple adjacent connection components are installed in place, the horizontal and vertical positions of the enclosure system relative to the connection rod can be adjusted through the first position fine adjustment device, so that the enclosure systems of two adjacent connection components are flush, and then the flatness of the overall strip structure formed by connecting multiple connection components in series is ensured, and the coordination between different sections is improved. In addition, the TMD can be adjusted to the ideal mass through the mass regulator to ensure the vibration reduction performance of the TMD. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 is the flow chart of the construction method of the large-span rigid-flexible parallel structure provided by the specific embodiment of the present invention;

[0068] Figure 2 is the top view of the large-span structure provided by the specific embodiment of the present invention;

[0069] Figure 3 is the elevation view of the truss structure provided by the specific embodiment of the present invention;

[0070] Figure 4 is Figure 3 the partial enlarged view at A in

[0071] Figure 5 is the top view of the truss structure provided by the specific embodiment of the present invention;

[0072] Figure 6 is Figure 5 The partial enlarged view at position B in

[0073] Figure 7 is the cross-sectional view of the truss structure provided by the specific embodiment of the present invention;

[0074] Figure 8 is the assembly schematic diagram of the truss structure provided by the specific embodiment of the present invention;

[0075] Figure 9 is the first construction process diagram provided by the specific embodiment of the present invention;

[0076] Figure 10 is the second construction process diagram provided by the specific embodiment of the present invention;

[0077] Figure 11 is the third construction process diagram provided by the specific embodiment of the present invention;

[0078] Figure 12 is the fourth construction process diagram provided by the specific embodiment of the present invention;

[0079] Figure 13 is the fifth construction process diagram provided by the specific embodiment of the present invention;

[0080] Figure 14 is the sixth construction process provided by the specific embodiment of the present invention Figure 1 ;

[0081] Figure 15 is the sixth construction process provided by the specific embodiment of the present invention Figure 2 ;

[0082] Figure 16 is the seventh construction process diagram provided by the specific embodiment of the present invention;

[0083] Figure 17 is the structural schematic diagram of the first tensioning unit provided by the specific embodiment of the present invention;

[0084] Figure 18 is the structural schematic diagram of the second tensioning unit provided by the specific embodiment of the present invention;

[0085] Figure 19 is the first assembly schematic diagram of the connection component provided by the specific embodiment of the present invention;

[0086] Figure 20 is the structural schematic diagram of the enclosure system provided by the specific embodiment of the present invention;

[0087] Figure 21is a second assembly diagram of the contact component provided in a specific embodiment of the present invention;

[0088] Figure 22 This is an eighth construction process diagram provided by a specific embodiment of the present invention;

[0089] Figure 23 This is a ninth construction process diagram provided by a specific embodiment of the present invention;

[0090] Figure 24 yes Figure 23 A partial enlarged view of point C in the middle;

[0091] Figure 25 This is the tenth construction process diagram provided by the specific embodiment of the present invention;

[0092] Figure 26 This is the eleventh construction process diagram provided by the specific embodiment of the present invention;

[0093] Figure 27 This is a schematic diagram of a large-span structure after construction is completed, provided by a specific embodiment of the present invention;

[0094] Figure 28 This is a front view of the contact assembly provided by the embodiment of the present invention after installation;

[0095] Figure 29 It is a structural schematic diagram of an anti-tilt device provided in a specific embodiment of the present invention;

[0096] Figure 30 1 is a schematic structural diagram of a first position fine adjustment device provided in a specific embodiment of the present invention;

[0097] Figure 31 1 is a schematic structural diagram of a mass regulator provided in a specific embodiment of the present invention;

[0098] Figure 32 It is a schematic diagram of the connection between the truss structure and the connecting components provided by a specific embodiment of the present invention;

[0099] Figure 33 yes Figure 32 A partial view of

[0100] Figure 34 It is a cross-sectional view of a vertically adjustable structure provided by a specific embodiment of the present invention.

[0101] In the figure:

[0102] 1. Truss structure; 2. Cable group; 3. Connecting assembly; 4. Anti-tilt device; 5. Enclosure and gap filling section; 6. Vertically adjustable structure; 8. End main structure; 9. Crane; 10. Measuring prism; 20. Measuring instrument; 30. Flexible joint;

[0103] 11. Truss section;

[0104] 21. Cable clamp; 22. Cable

[0105] 211. Second connecting member; 2111. Second oblong hole

[0106] 221. Cable body; 222. Cable head

[0107] 31. Connecting rod; 32. Enclosure system; 33. Mass regulator; 34. First position fine adjustment device; 35. Length adjustable section; 36. Connector; 37. Pin shaft; 38. Support plate; 39. Load-bearing plate

[0108] 311. First connecting member; 321. Enclosure truss; 322. Enclosure board

[0109] 331. Liquid storage container; 332. Liquid guide pipe; 333. Suction port; 334. Vent valve; 335. Liquid

[0110] 341. Horizontal adjustment member; 342. Vertical adjustment member; 343. Friction reducing plate

[0111] 361. Ear plate; 391. Horizontal plate; 392. Vertical plate

[0112] 41. Rigid rod; 42. First bolt; 43. Second bolt; 411. First oblong hole

[0113] 61. Truss plate; 62. Connecting plate; 63. Fastener; 64. Friction reducing positioning plate; 65. Sacrificial element

[0114] 611. First strip hole; 612. Second strip hole

[0115] 71. First tensioning unit; 72. Second tensioning unit; 73. Tensioning tooling

[0116] 711. Winding equipment; 712. Steel wire rope; 713. Guide wheel; 714. Pulley block

[0117] 721. Two-way lifting equipment; 722. Adjusting equipment; 723. Steel strand

[0118] 81. Connecting ear plate; 91. Hook Detailed implementation mode

[0119] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0120] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0121] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0122] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0123] As Figure 1 shown, this embodiment provides a construction method for a large-span structure with a rigid-flexible parallel connection. Refer to Figure 2 , the large-span structure includes a rigid-flexible parallel structure and a strip structure. The rigid-flexible parallel structure includes a truss structure 1 and a cable structure. The cable structure includes a plurality of cable groups 2 arranged side by side. The strip structure includes a plurality of connection components 3 connected in series. The construction method for the large-span structure with a rigid-flexible parallel connection includes:

[0124] S1. Construct the rigid-flexible parallel structure;

[0125] S2. Construct the strip structure.

[0126] That is, first construct the truss structure 1 and the cable groups 2 in the rigid-flexible parallel structure, and then construct the strip structure formed by connecting a plurality of connection components 3 in series. A network structure is formed by the intersection of a plurality of cable groups 2 and a plurality of strip structures.

[0127] Specifically, step S1 includes:

[0128] S11. Establish a simulation model of the rigid-flexible parallel structure. Refine the rigid-flexible parallel structure, all additional structures installed thereon, and the connection nodes between components according to the design construction drawings, and clarify the actual magnitudes and distributions of all dead loads on the rigid-flexible parallel structure.

[0129] Specifically, the truss structure 1 is rigid, and the cable structure is flexible. The two are connected in parallel to form a rigid-flexible parallel structure. The additional structures on the rigid-flexible parallel structure include strip structures, components for decoration, components for connection, etc. That is, all structures installed thereon, except for the truss structure 1 and the cable structure itself, can be collectively referred to as additional structures. Since the cable structure, the truss structure 1, its additional structures, connection nodes, etc. are deepened and refined according to the design construction drawings, and the actual magnitudes and distributions of all dead loads on the rigid-flexible parallel structure are clarified, the established model can be made more accurate.

[0130] S12. With the goal that the rigid-flexible parallel structure reaches the design configuration under the action of dead loads, determine the zero-stress configuration of the truss structure 1 through the iterative form-finding analysis method.

[0131] There are vertical deformation differences ΔZ, horizontal deformation differences ΔY, and axial deformation differences ΔX between the zero-stress configuration and the design configuration of the truss structure 1.

[0132] Based on the model established in step S11, clarify the zero-stress configuration of the truss structure 1 with the goal of reaching the design configuration. The design configuration is the ideal configuration in which the deformation differences after the construction of the rigid-flexible parallel structure are within the allowable range. The above iterative form-finding analysis method is a common means in existing simulation technologies and will not be elaborated here.

[0133] There is often a deviation between the dead load centroid and the structural rigidity center (i.e., the center of stiffness) of the truss structure 1. Therefore, the zero-stress configuration obtained through the iterative form-finding analysis method generally shows a multi-directional bending configuration; for the large-span truss structure 1, compared with the design configuration, its vertical difference in the zero-stress configuration is relatively large, while the horizontal difference is relatively small, and the axial difference is even smaller, that is, the vertical deformation difference ΔZ is greater than the horizontal deformation difference ΔY is greater than the axial deformation difference ΔX, as Figure 7 shown. The axial deformation difference ΔX is usually very small and can be ignored.

[0134] See Figure 3 and Figure 5 , the truss structure 1 should be installed at a high altitude between two spaced-apart end main structures 8. Specifically, two truss structures 1 are installed between the two end main structures 8, and the cable structure is located between the two truss structures 1. The truss structure 1 is connected to the adjacent cable group 2 to form a rigid-flexible parallel structure.

[0135] See Figure 3 and Figure 4, where the solid lines represent the truss structure 1 in the designed state, the dashed lines represent the truss structure 1 in the zero-stress state, and the vertical deformation difference between the two states is ΔZ.

[0136] See Figure 5 , which shows a schematic diagram of the truss structure 1 in a top view. Combining Figure 6 can display the horizontal deformation difference between the two states. In the figure, the solid lines represent the truss structure 1 in the designed state, the dashed lines represent the truss structure 1 in the zero-stress state, and the horizontal deformation difference between the two states is ΔY.

[0137] See Figure 7 , which shows the deformation differences of the truss structure 1 in the zero-stress state and the designed state in the vertical and horizontal directions. It can be seen that ΔZ > ΔY.

[0138] S13. Compensate for the vertical deformation difference ΔZ, the horizontal deformation difference ΔY of the truss structure 1, and selectively compensate for the axial deformation difference ΔX, so that the truss structure 1 conforms to the zero-stress state, and install the compensated truss structure 1 in place at high altitude. That is, the axial deformation difference ΔX can be considered for compensation or ignored.

[0139] Specifically, usually the axial deformation difference ΔX is small and compensation is ignored. At this time, step S13 includes:

[0140] S131. Compensate for the vertical deformation difference ΔZ of the truss structure 1: Based on the horizontal coordinates of the comprehensive design construction drawing and the vertical coordinates of the zero-stress state, conduct a detailed design of the truss structure 1, and issue detailed drawings accordingly to guide the factory to process the truss section 11 of the truss structure 1 to complete the compensation of the vertical deformation difference ΔZ.

[0141] That is, in the factory processing stage, only the vertical deformation difference ΔZ is compensated, and the detailed truss structure 1 only shows a vertical bending state, making the detailed work and factory assembly tend to be simple and reducing the manufacturing difficulty.

[0142] Furthermore, the truss structure 1 is divided into multiple truss sections 11. During the detailed design stage, it is necessary to determine the length of each truss section 1111 to better compensate for the horizontal deformation difference ΔY.

[0143] S132. Compensate for the horizontal deformation difference ΔY of the truss structure 1: Transport the truss sections 11 processed by the factory to the construction site for assembly. During assembly, the horizontal coordinates of each connection point between the truss sections 11 are compensated according to the zero-stress state, so that the assembled truss structure 1 conforms to the zero-stress state.

[0144] As Figure 8 shown, multiple truss sections 11 are connected to fit the zero-stress state in a zigzag manner in the horizontal direction.

[0145] If it is necessary to consider compensating for the axial deformation difference ΔX, then step S131 at this time is as follows:

[0146] Based on the horizontal coordinates of the comprehensive design construction drawings, the vertical coordinates and axial coordinates of the zero-stress state, the truss structure 1 is deeply designed, and deepening drawings are issued accordingly to guide the factory to process the truss section 11 of the truss structure 1, so as to complete the comprehensive compensation of the vertical deformation difference ΔZ and the axial deformation difference ΔX;

[0147] That is, in the factory processing stage, the vertical deformation difference ΔZ and the axial deformation difference ΔX are comprehensively compensated.

[0148] In this embodiment, after the connection between the cable structure and the truss structure 1 is completed and all the additional structures on the truss structure 1 are constructed, the truss structure 1 should exactly match the designed shape. Therefore, following this principle, in the stage of designing and installing the truss structure 1, the vertical deformation difference ΔZ and the horizontal deformation difference ΔY between the zero-stress state and the designed state should be compensated (usually the axial deformation difference ΔX is ignored) so that the truss structure 1 matches the zero-stress state after being installed at high altitude and before being connected to the cable structure. Specifically, the vertical deformation difference ΔZ of the truss structure 1 is compensated in the factory processing stage, and when the truss section 11 is assembled on-site after the factory processing is completed, the horizontal deformation difference ΔY of the truss structure 1 is compensated. After the total assembly of multiple truss sections 11 is completed, the formed truss structure 1 exactly matches the zero-stress state due to the compensation of the vertical deformation difference ΔZ and the horizontal deformation difference ΔY. This construction method adopts a shape control scheme of "vertical compensation in the factory and horizontal compensation on-site" for the truss structure 1, that is, the compensation of the vertical deformation difference ΔZ and the horizontal deformation difference ΔY is carried out in stages. Compared with compensating for the deformation differences in two directions simultaneously, the manufacturing and assembly difficulties are reduced, and the factory processing efficiency and accuracy are improved.

[0149] When hoisting the truss structure 1, it is installed in place by means of segmented hoisting or overall lifting, etc., and then the enclosure functional components on the truss structure 1 are installed. Optionally, the enclosure functional components can also be installed on the truss structure 1 on the ground and then hoisted as a whole to high altitude. As Figure 9 shown, it is a schematic diagram of two truss structures 1 after being installed at high altitude.

[0150] S14. Hoist the non-tension end of the cable group 2 in place, use the first tensioning unit 71 to pull the tensioning end of the cable group 2 to complete the preset tensioning stroke, and then finely adjust the cable shape of each cable 22 in the cable group 2 through the second tensioning unit 72 and tension it in place.

[0151] S15. Repeat step S14 to install and tension all the cable groups 2 of the cable structure in place.

[0152] As Figures 10 to 16 shown, it is a schematic diagram of the installation of the cable group 2 of the cable structure. The following is referred toFigures 10 to 16 Describe the hoisting and tensioning process of cable group 2.

[0153] See also Figure 10 After the two truss structures 1 are installed at high altitude, the cables are laid out in the cable laying area on the ground. The cable group 2 to be constructed exemplarily includes two cables 22. The cable clamp 21 is installed between the two cables 22 on the ground to form an integrated cable group 2 with the two cables 22.

[0154] In step S14, see Figure 18 The two cables 22 of the cable group 2 are connected by a tensioning tool 73. Each cable 22 includes a cable body 221 and a cable head 222 provided at the end of the cable body 221. The end main structure 8 is provided with a plurality of connecting ear plates 81 corresponding to the cables 22 one by one. The connecting ear plates 81 are used to connect with the cable head 222 after the corresponding cable 22 is tensioned into place. The tensioning tool 73 is located on the side of the cable head 222 facing away from the connecting ear plates 81.

[0155] See also Figure 17 The first tensioning unit 71 includes a winding device 711, on which a steel wire rope 712 is wound. The steel wire rope 712 is connected to the tensioning fixture 73. The winding device 711 winds and unwinds the steel wire rope 712 to tension the cable assembly 2. Furthermore, the first tensioning unit 71 also includes a guide wheel 713 and a pulley assembly 714. The guide wheel 713 is mounted on a planar support. The pulley assembly 714 includes a first pulley and a second pulley. The first pulley is hinged to the end main structure 8, and the second pulley is hinged to the tensioning fixture 73. The steel wire rope 712 passes through the guide wheel 713, the first pulley, and the second pulley in sequence.

[0156] See also Figure 18 The second tensioning unit 72 includes a bidirectional lifting device 721 and a retractable adjustment device 722. The bidirectional lifting device 721 is mounted on the end main structure 8 and connected to the tensioning fixture 73. The tensioning fixture 73 is equipped with an adjustment device 722 corresponding to each cable 22. The retractable end of the adjustment device 722 is connected to the cable head 222. Furthermore, the bidirectional lifting device 721 is connected to the tensioning fixture 73 via a steel strand 723.

[0157] Specifically, step S14 includes:

[0158] S141, the tensioning tool 73, the first tensioning unit 71 and the second tensioning unit 72 are installed in place.

[0159] Specifically, the tensioning tool 73 and the adjustment device 722 are installed at the tensioning end of the cable group 2, and the measuring prism 10 is arranged at the mid-span position of each cable 22 of the cable group 2. Then, the non-tensioning end of the cable group 2 is hoisted to a high altitude using a crane 9 and connected to the connecting ear plate 81 on the main structure 8 at the corresponding end, as shown in FIG.Figure 11 as shown

[0160] S142. Start the winding device 711 to tow the cable group 2 close to the connecting ear plate 81 through the steel wire rope 712, as Figure 12 shown, which is a schematic diagram of the first tensioning unit 71 tensioning the cable group 2.

[0161] S143. When the cable head 222 of the cable 22 approaches the connecting ear plate 81, the winding device 711 stops operating and is locked through the safety locking device so that the cable group 2 is maintained in the existing position.

[0162] S144. Connect the two-way lifting device 721 and the tensioning tooling 73. Specifically, fix and connect the steel strand 723 of the two-way lifting device 721 with the anchoring unit on the tensioning tooling 73 on the operation platform.

[0163] S145. Start the two-way lifting device 721 to gradually transfer the tension force to the two-way lifting device 721, as Figure 13 shown, which is a schematic diagram of the remaining stroke of the second tensioning unit 72 tensioning the cable group 2. Specifically, the two-way lifting device 721 slowly tensions the steel strand 723 in a displacement control mode, and gradually transfers the tension force from the pulley block 714 to the two-way lifting device 721; when the steel wire rope 712 on the pulley block 714 is significantly slack, the pulley block 714 can be removed.

[0164] S146. Adjust the cable head 222 so that it can smoothly enter the connecting ear plate 81. Specifically, the two-way lifting device 721 continues to tension in a displacement control mode. When the cable head 222 is about to enter the ear plate 361, the cable head 222 can be adjusted to a state where it can smoothly enter the connecting ear plate 81 through the individual actions of the two left and right two-way lifting devices 721. If the two-way lifting device 721 is difficult to achieve this function, the adjusting device 722 can be turned on for further adjustment.

[0165] S147. After the cable shape of any cable 22 in the cable group 2 is in place, drive the cable shapes of the remaining cables 22 to be in place through the adjusting device 722. Specifically, the two-way lifting device 721 continues to tension in a displacement control mode. After the cable shape of a certain cable 22 in the cable group 2 is in place first, check whether the cable shapes of the remaining cables 22 are in place. For the cables 22 that are not in place, turn on the corresponding adjusting device 722 and also use the displacement control mode to slowly lift the cable head 222 by the adjusting device 722 until its cable shape is in place.

[0166] S148. Record the distance between the pin hole on the cable head 222 of each cable 22 and the pin hole on the corresponding connecting ear plate 81 as the cable length adjustment amount of this cable 22.

[0167] S149. Fine-tune each cable 22 according to the cable length adjustment amount;

[0168] In step S149, if the cable length of the cable 22 cannot be adjusted, the two-way lifting device 721 retracts in a displacement control mode until the cable length of the cable 22 can be adjusted. Specifically, affected by factors such as tensile force, the restraint of the ear plate 361, and insufficient space, the cable length may not be smoothly adjusted. After retracting the two-way lifting device 721 in a displacement control mode, the above-mentioned influences can be overcome until the cable length can be adjusted more easily.

[0169] S1410. After the cable lengths of all the cables 22 are adjusted, continue to tension through the two-way lifting device 721 and the adjusting device 722, and install and fix the pin shaft component after the pin holes of the cable heads 222 are aligned with the pin holes on the corresponding connecting ear plates 81.

[0170] S1411. After all the cable heads 222 are connected to the corresponding connecting ear plates 81 through the pin shaft components, the two-way lifting device 721 gradually unloads the tensile force to transfer the tensile force to the position of the pin shaft component. Specifically, in this process, the two-way lifting device 721 slowly unloads in a displacement control mode or a force control mode to complete the transition of the tensile force from the steel strand 723 to the pin shaft component. After the tensile force on the steel strand 723 is unloaded, step S1412 is carried out.

[0171] S1412. Remove the first tensioning unit 71 and the second tensioning unit 72.

[0172] Based on the characteristics that the cable group 2 has a small pre-tensile force and a large post-tensile force, most of the travel of the pre-tensioning of the cable group 2 is completed through the cooperation of the first tensioning unit 71 and the tensioning tooling 73, effectively improving the tensioning efficiency, shortening the air suspension time, and reducing the construction risk; the later tensioning work of the cable group 2 is completed through the cooperation of the two-way lifting device 721 and the adjusting device 722 in the second tensioning unit 72, which can realize the simultaneous in-place of the cable shapes of all the cables 22, and then the cable length adjustment amounts of each cable 22 can be accurately measured, avoiding the problem of repeated adjustment caused by the adverse effects brought by the in-place of the cable shapes of the cables 22 one by one, and ensuring the consistency of the cable shapes and cable forces of each cable 22 in the cable group 2.

[0173] Furthermore, when the two-way lifting device 721 tensions in a displacement control mode, refer to Figure 13 , set up the measuring instrument 20 to aim at each measuring prism 10 at the mid-span of the cable group 2 for real-time tracking measurement. Preferably, the real-time measurement data of each measuring prism 10 is coupled with the displacement control program of the two-way lifting device 721 to realize the high-precision automatic regulation of the cable shape.

[0174] Repeat the above hoisting and tensioning steps of the cable group 2 until all the cable groups 2 in the cable structure are hoisted and tensioned in place.

[0175] Further, in the tensioning work of multiple cable groups 2, it also includes step S140: controlling the cable shape of the cable group 2 based on the temperature sensitivity of the cable group 2. Step S140 includes:

[0176] S1401. The first cable group 2 is tensioned on a cloudy day when the temperature difference does not exceed the preset range, and temperature sensors are arranged on the cable group 2. The cable shape is corrected according to the cable shape-temperature relationship determined by theoretical analysis.

[0177] S1402. After the tensioning of the first cable group 2 is completed according to the corrected cable shape, at least 24-hour real-time monitoring is carried out to obtain the measured curve of the cable shape-temperature relationship, and it is compared with the theoretical cable shape-temperature relationship. Relying on the measured and theoretical data, a cable shape-temperature mapping function is formulated, and the first cable group 2 is finely adjusted for the second time according to the mapping function.

[0178] S1403. For the cable shapes of the subsequently installed cable groups 2, tensioning is carried out based on the real-time measured cable shapes of the adjacent cable groups 2, and real-time temperature measurement and correction are no longer carried out. As Figure 14 and Figure 15 shown, after the tensioning of the first cable group 2 is completed, when the second cable group 2 is tensioned, measuring prisms 10 are also arranged on the second cable group 2. The measuring instrument 20 is aligned with each measuring prism 10 at the mid-span of the cable group 2 for real-time tracking measurement to reflect the cable shape of the cable group 2. The cable shape of the second cable group 2 can be tensioned based on the real-time measured cable shape of the first cable group 2, and real-time temperature measurement and correction of the second cable group 2 are no longer carried out, that is, the tensioning of the subsequent cable groups 2 is no longer restricted by the weather.

[0179] As Figure 16 shown, it is a schematic diagram after the installation of two truss structures 1 and the cable structure between the two truss structures 1. The left side is a top view, and the right side is an axonometric view.

[0180] After step S1 (constructing the rigid-flexible parallel structure) is completed, the process of step S2 (constructing the strip structure) is entered. As Figures 19 to 27 shown, specifically, step S2 includes:

[0181] S21. Assemble the integrated connection component 3 in the factory.

[0182] Refer to Figure 19 , Figure 20 and Figure 21 , the connection component 3 includes a connection rod 31, a TMD (tuned mass damper) arranged on the connection rod 31, and an enclosure system 32 surrounding the connection rod 31. A mass regulator 33 is arranged on the TMD, and a first position fine-tuning device 34 is connected between the enclosure system 32 and the connection rod 31 (refer to Figure 30The first position fine-tuning device 34 is used to adjust the horizontal and vertical position of the enclosure system 32 relative to the connecting rod 31 to resolve the problem of uneven alignment of the connecting components 3 after they are connected in series. The enclosure system 32 includes an enclosure truss 321 and an enclosure plate 322. The enclosure truss 321 is connected to the connecting rod 31, and the enclosure plate 322 is provided on the outside of the enclosure truss 321.

[0183] The above step S21 specifically includes:

[0184] S211, in the factory, TMD and mass regulator 33 are connected to the connecting rod 31 as a whole, such as Figure 19 , which is a schematic diagram of TMD and mass regulator 33 assembled on the connecting rod 31;

[0185] S212, connecting the enclosure truss 321 and the connecting rod 31 into one piece in the factory;

[0186] S213, complete the installation of the enclosure 322 in the factory to form an integrated connection component 3. Figure 21 FIG. 3 is a schematic diagram of a protective plate 322 covered on a protective truss 321. At this point, the integrated connecting component 3 is formed. The belt structure is formed by a plurality of connecting components 3 connected in series.

[0187] Since the connecting rod 31, TMD and enclosure system 32 are assembled at the factory stage to form an integrated connecting component 3, the integrated connecting component 3 can be transported to the construction site for hoisting. Compared with the high-altitude installation operation method in the existing technology, the workload of high-altitude assembly is reduced, the construction efficiency is improved, and the safety hazards are reduced.

[0188] S22 , installing the connecting assembly 3 between the cable clamps 21 of two adjacent cable groups 2 .

[0189] The prefabricated multiple connection components 3 are transported to the construction site, and the connection components 3 are hoisted by the crane 9 at the construction site, such as Figure 22 As shown, the crane 9 hoists a connecting assembly 3 between two adjacent cable groups 2 through a hook 91, and completes the connection between the connecting assembly 3 and the two adjacent cable groups 2. Specifically, the connecting rod 31 of the connecting assembly 3 is hinged to the cable clamps 21 of the two cable groups 2.

[0190] S23. Install the anti-tilt device 4, which is connected to the connecting assembly 3 and the cable clamp 21 to prevent the cable assembly 2 from tilting. After the connecting assemblies 3 symmetrically on both sides of the same cable clamp 21 are installed, remove the anti-tilt device 4 from the first connecting assembly 3 installed. No anti-tilt device 4 is required between the connecting assembly 3 installed later and the cable clamp 21.

[0191] After the connection component 3 is installed on the cable group 2, the anti-tilting device 4 is installed at the corresponding position of the connection component 3. The anti-tilting device 4 is connected between the connection component 3 and the cable clip 21 of the cable group 2 to balance the eccentric moment generated on the cable group 2 and prevent the cable group 2 from being severely deflected. Since the cable group 2 can be prevented from deflecting by installing the anti-tilting device 4 at the corresponding position after each connection component 3 is installed, there is no need to strictly control the installation order of the connection components 3 and no need for strictly symmetric hoisting, which reduces the requirements for material supply, component stacking, crane equipment layout and management control, etc. While effectively controlling the torsional deformation of the cable group 2, the installation of the connection component 3 becomes more flexible and the construction efficiency is improved. Moreover, compared with the existing balance method of hanging counterweights, there is no need to hang additional counterweights in the present invention, which can avoid the construction risks brought by the high-altitude suspension of counterweights while reducing the construction cost.

[0192] As Figure 23 and Figure 24 shown, it is a schematic diagram of installing the anti-tilting device 4 on the connection component 3. Specifically, the anti-tilting device 4 is installed between both ends of the connection component 3 and the corresponding cable clip 21 to balance the eccentric loads borne by the two cable groups 2. Further, the crane 9 hoists the connection component 3 through the hook 91. After the connection component 3 is in place and before the crane 9 releases the hook 91, the anti-tilting device 4 is installed to ensure the safety during the installation of the anti-tilting device 4. After the anti-tilting device 4 is installed, the crane 9 drives its hook 91 to release the hook for the subsequent hoisting of the next connection component 3.

[0193] As Figure 25 shown, after installing multiple connection components 3 between a pair of cable groups 2 (adjacent two cable groups 2) and installing the anti-tilting device 4 on all the connection components 3, the installation work of the connection components 3 between the adjacent pair of cable groups 2 is carried out. The multiple connection components 3 in this pair of cable groups 2 are in one-to-one correspondence with the multiple connection components 3 between the previous pair of cable groups 2, and the two corresponding connection components 3 are hinged on the same cable clip 21, that is, a connection component 3 is symmetrically installed on both sides of the cable clip 21.

[0194] After the connection components 3 symmetrically installed on both sides of the same cable clip 21 are in place, the anti-tilting device 4 connected to the cable clip 21 on the previously installed connection component 3 is removed, and there is no need to install the anti-tilting device 4 between the cable clip 21 and the subsequently installed connection component 3. Refer to Figure 25 , in the figure, the connection component 3 in the lower left corner is the newly installed connection component 3, and there is no need to install the anti-tilting device 4 on one end close to the corresponding connection component 3 because the eccentric loads generated on both sides of the cable clip 21 due to the installation of the connection components 3 will balance each other. That is, after the two symmetric connection components 3 on the same cable clip 21 are installed, the anti-tilting device 4 is only provided on the side far from each other, and there is no need to install the anti-tilting device 4 at both ends of each connection component 3, effectively improving the construction efficiency.

[0195] like Figure 26 As shown, the connection components 3 on the middle pair of cable groups 2 or two pairs of cable groups 2 can be constructed first. After the construction is completed, the connection components 3 are simultaneously constructed from the middle to the truss structures 1 on both sides until all the connection components 3 are completed.

[0196] S24, after the connection components 3 on the adjacent multiple rope groups 2 are installed, the horizontal and vertical positions of the enclosure systems 32 relative to the connection rods 31 are adjusted by the first position fine-adjusting device 34 so that the corresponding multiple enclosure systems 32 are aligned.

[0197] By setting up a first position fine-tuning device 34, after multiple adjacent connecting components 3 are installed in place, the horizontal position and vertical position of the enclosure system 32 relative to the connecting rod 31 can be adjusted by the first position fine-tuning device 34 to make the enclosure systems 32 of two adjacent connecting components 3 flush, thereby ensuring the overall flatness of the strip structure formed by the multiple connecting components 3 in series and improving the coordination between the sections.

[0198] S25. Construct a retaining gap-filling section 5 between two adjacent connecting assemblies 3. Furthermore, a second position fine-tuning device is provided on the retaining gap-filling section 5. The second position fine-tuning device is used to adjust the horizontal and vertical positions of the retaining gap-filling section 5 so that the retaining gap-filling section 5 is flush with the retaining system 32 of the connecting assembly 3, thereby ensuring the flatness of the entire strip structure.

[0199] S26 , fine-tuning the mass of the TMD to an ideal mass through the mass adjuster 33 to ensure the vibration reduction performance of the TMD.

[0200] S27. Finely adjust the position of the connecting component 3 relative to the cable structure and the truss structure 1 in the horizontal and vertical directions so that the rigid-flexible parallel structure reaches the designed shape.

[0201] like Figure 27 As shown in the figure, it is a schematic diagram after the strip structure is completed. Figure 28 , which is a schematic diagram of the installation of the connecting component 3 between two cable groups 2.

[0202] Figure 29 The figure shows a schematic diagram of the anti-roll device 4 mentioned in step S23. The anti-roll device 4 includes a rigid rod 41, which has bending resistance. The extension direction of the rigid rod 41 is consistent with the extension direction of the connecting assembly 3. One end of the rigid rod 41 is connected to the connecting rod 31 of the connecting assembly 3, and the other end of the rigid rod 41 is connected to the cable clip 21.

[0203] By adding a rigid rod 41, the original hinged connection between the connection assembly 3 and the cable clip 21 is changed into a connection structure capable of bearing bending moment. Thus, the eccentric bending moment generated by the eccentric load is jointly borne by the anti-tilting device 4 and the connection assembly 3. Each cable 22 of the cable group 2 can evenly share the vertical force transmitted by the connection assembly 3, and the deflection deformation of the cable group 2 is restricted by the anti-tilting device 4.

[0204] See Figure 29 , a first connecting piece 311 is arranged on the connecting rod 31 of the connection assembly 3, a second connecting piece 211 is arranged on the cable clip 21, one end of the rigid rod 41 is detachably connected to the first connecting piece 311, and the other end of the rigid rod 41 is detachably connected to the second connecting piece 211. Through the first connecting piece 311 on the connection assembly 3 and the second connecting piece 211 on the cable clip 21, the rigid rod 41 can be installed more conveniently, and the rigid rod 41 is detachably connected to the connection assembly 3 and the cable clip 21, which is convenient for repeated use.

[0205] Furthermore, the rigid rod 41 is connected to the first connecting piece 311 through a first bolt 42, and the rigid rod 41 is connected to the second connecting piece 211 through a second bolt 43. The axis of the first bolt 42 is parallel to the connection assembly 3, and the axis of the second bolt 43 is perpendicular to the connection assembly 3. The first bolt 42 is subjected to less force and can be selected as an ordinary bolt. Since the second bolt 43 bears shear force, it is preferably a friction-type high-strength bolt.

[0206] See Figure 29 , for the convenience of removing the rigid rod 41 in the stressed state, a first long circular hole 411 is formed in the rigid rod 41 along its length direction, and the second bolt 43 penetrates through the second connecting piece 211 and the first long circular hole 411. During the force-bearing stage of the rigid rod 41, the force is transmitted through the friction of the friction-type high-strength bolt. When the rigid rod 41 needs to be removed, as the pre-tightening force of the friction-type high-strength bolt is removed, the friction-type high-strength bolt slips slightly in the first long circular hole 411 to remove the internal force of the rigid rod 41, thereby making the removal operation easy and non-destructive.

[0207] Furthermore, see Figure 29 , a second long circular hole 2111 is arranged on the second connecting piece 211, the extending direction of the second long circular hole 2111 is perpendicular to the extending direction of the first long circular hole 411, and the second bolt 43 penetrates through the first long circular hole 411 and the second long circular hole 2111 to connect the rigid rod 41 and the second connecting piece 211. The arrangement of the second long circular hole 2111 and the first long circular hole 411 makes it more convenient to insert the second bolt 43 and avoids the situation where the two holes are not aligned and cannot be installed.

[0208] Figure 30 The figure shows a schematic structural diagram of the first position fine-tuning device 34 mentioned in step S21. See Figure 30, the enclosure panel 322 is covered outside the enclosure truss 321, and the connecting rod 31 is passed through the enclosure truss 321. The first position fine-tuning device 34 includes a horizontal adjusting member 341 and a vertical adjusting member 342 to adjust the position of the enclosure system 32 in the X direction and the Z direction. The X direction is the width direction of the connecting rod 31, and the Z direction is the vertical direction.

[0209] A support plate 38 is provided on the connecting rod 31, and a load-bearing plate 39 is provided on the support plate 38. The load-bearing plate 39 includes a horizontal plate 391 and a vertical plate 392 that are perpendicularly connected. The horizontal adjusting member 341 is threadedly connected to the enclosure truss 321 and can push against the vertical plate 392 along the X direction to adjust the position of the enclosure system 32 in the X direction, that is, the horizontal position. The vertical adjusting member 342 is threadedly connected to the enclosure truss 321 and can push against the horizontal plate 391 vertically to adjust the position of the enclosure system 32 in the vertical direction so that the enclosure system 32 reaches the elevation.

[0210] See Figure 30 , the first position fine-tuning device 34 further includes a top connector and a bottom connector. A first fixing plate is provided at the top of the support plate 38, and a first vertical strip hole is provided on the first fixing plate. A first horizontal strip hole is provided on the enclosure truss 321. The top connector passes through the first vertical strip hole and the first horizontal strip hole, and its position in the first vertical strip hole and the first horizontal strip hole is adjustable. A second fixing plate is provided on the enclosure truss 321, and a second horizontal strip hole is provided on the second fixing plate. A second vertical strip hole is provided at the bottom of the support plate 38. The bottom connector passes through the second horizontal strip hole and the second vertical strip hole, and its position in the second horizontal strip hole and the second vertical strip hole is adjustable. In this embodiment, both the top connector and the bottom connector are threaded connectors.

[0211] See Figure 30 , two load-bearing plates 39 are provided on the support plate 38 along the X direction, and a vertical adjusting member 342 is provided above each of the two load-bearing plates 39. When using the vertical adjusting member 342 to adjust the vertical position of the enclosure system 32, friction-reducing plates 343 are padded on the horizontal plates 391 of the two load-bearing plates 39, and the two vertical adjusting members 342 are adjusted to tightly press against the corresponding friction-reducing plates 343. The two vertical adjusting members 342 are located at both ends of the enclosure truss 321 along the X direction. Therefore, not only can the elevation of the enclosure system 32 be adjusted, but also the torsional form of the enclosure system 32 can be adjusted.

[0212] Furthermore, horizontal adjusting members 341 are provided on the sides of the vertical plates 392 of the two load-bearing plates 39 facing away from each other. The horizontal position of the enclosure system 32 relative to the connecting rod 31 can be adjusted left or right through the two horizontal adjusting members 341.

[0213] Figure 31The diagram shows the structure of the mass regulator 33 in step S21. The mass regulator 33 includes a liquid storage container 331 and a liquid conduit 332. One end of the liquid conduit 332 is connected to the liquid storage container 331, and the other end is connected to a suction port 333. The suction port 333 allows liquid 335 to be drawn from the liquid storage container 331 or injected into the liquid storage container 331.

[0214] In step S25, it also includes: constructing a flexible joint 30 between the enclosure gap filling section 5 and the connection component 3, and the suction and irrigation port 333 is flush with the flexible joint 30 and exposed. The flexible joint 30 can absorb the expansion and contraction deformation between the enclosure system 32 and the enclosure gap filling section 5 during the service of the connection component 3. Figure 28 Figure 2 shows the completed construction of the enclosure gap filling section 5 and the flexible joint 30. The flexible joint 30 can be sealed with sealant, an accordion cover, etc., and the suction port 333 of the mass regulator 33 must be flush with the flexible joint 30 to facilitate the extraction or injection of liquid 335.

[0215] In step S26, the natural frequency values of the TMD deployment points need to be measured, and the ideal mass of the TMD is calculated based on the measurement results. The mass adjustment value of the TMD is determined based on the deviation between the ideal mass and the existing mass of the TMD. Subsequently, liquid 335 is poured into or withdrawn from the liquid storage container 331 through the suction port 333 until the TMD reaches the ideal mass and, in turn, the TMD reaches the expected natural frequency, ensuring the vibration reduction performance of the TMD. The mass regulator 33 can adjust the TMD's frequency value within the enclosed space formed by the enclosure system 32. Fine-tuning the TMD's frequency can be achieved without leaving any gaps in the enclosure system 32, avoiding the adverse effects of leaving gaps at high altitudes. Furthermore, during the service life of the strip structure, as loads change or structural relaxation and degradation occur, the TMD's frequency can be conveniently adjusted in real time, achieving full-process optimization of vibration reduction performance.

[0216] Furthermore, one end of the liquid guiding tube 332 is connected to the bottom wall of the liquid storage container 331, the highest point of the liquid guiding tube 332 is higher than the highest point of the liquid storage container 331, and the suction and irrigation port 333 is lower than the highest point of the liquid guiding tube 332. Figure 31 The liquid conduit 332 includes a first and a second connected section. The first section is connected to the bottom of the liquid storage container 331 via a bend and extends upward to its highest point. The second section extends downward at an angle from the highest point and connects to the suction port 333. Because the highest point of the liquid conduit 332 is higher than both the highest point of the liquid storage container 331 and the suction port 333, the liquid 335 will not overflow due to gravity.

[0217] Preferably, the liquid storage container 331 is provided with a vent valve 334 that automatically opens when the pressure within the liquid storage container 331 reaches a threshold. When liquid 335 is poured into or withdrawn from the liquid storage container 331, the pressure within the liquid storage container 331 changes. The vent valve 334 ensures that the pressure within the liquid storage container 331 does not exceed a set range, thereby preventing the liquid 335 from being ejected under pressure.

[0218] Preferably, a frequency meter is provided on the TMD, and the frequency meter is used to measure the natural frequency value of the TMD, and the accuracy of the TMD frequency adjustment is ensured by real-time monitoring and feedback of the frequency value.

[0219] Furthermore, a sealing plug is detachably provided at the suction port 333. After the suction and filling process of the liquid 335 is completed, the sealing plug is used to seal the suction port 333. When adjusting the quality of the TMD next time, the sealing plug can be removed.

[0220] Figure 32 、 Figure 33 as well as Figure 34 The figure shows a schematic diagram of the connection between the truss structure 1 and the connecting component 3. Through the connection between the two, the position of the connecting component 3 relative to the truss structure 1 and the cable structure can be accurately adjusted.

[0221] In step S27, the connection component 3 between the truss structure 1 and the cable structure is defined as a side span connection component, such as Figure 32 and Figure 33 As shown, the side span connection assembly includes a length-adjustable section 35, which is used to compensate for the horizontal coordinate difference of the rigid-flexible parallel structure; a vertically adjustable structure 6 is provided at the connection node between the side span connection assembly and the truss structure 1, which is used to compensate for the vertical coordinate difference of the rigid-flexible parallel structure.

[0222] Due to the inevitable discrepancies between theoretical analysis and actual construction, the truss structure 1 and the cable structure installed according to the process described in step S1 above cannot completely match the designed form. In other words, there will inevitably still be a certain degree of configurational deviation between the two. Therefore, the side span connection assembly is installed between the truss structure 1 and the cable structure. The horizontal length of the connection assembly 3 is adjusted via the adjustable length section 35 of the side span connection assembly to compensate for the horizontal coordinate difference of the rigid-flexible parallel structure. The vertical displacement of the connection assembly 3 can be adaptively adjusted via the vertical adjustable structure 6 to compensate for the vertical coordinate difference of the rigid-flexible parallel structure, thereby allowing the truss structure 1 to better achieve the designed form. This construction method allows the rigid-flexible parallel structure to be constructed, and the deformation difference between the rigid truss structure 1 and the flexible cable structure can be controlled during the construction and use phases, thereby improving the force coordination between the rigid-flexible parallel structure.

[0223] Specifically, see Figure 32 and Figure 33, the connecting rod 31 of the side-span connection assembly is connected with a connector 36 through an adjustable-length section 35. The vertically adjustable structure 6 includes a truss plate 61 arranged on the truss structure 1. A first strip-shaped hole 611 and a second strip-shaped hole 612 are formed in the truss plate 61 in the vertical direction. See Figure 33 , the truss plate 61 is clamped between two ear plates 361 of the connector 36. Connecting plates 62 are arranged on one side of the two ear plates 361 facing away from each other. A pin shaft 37 penetrates through the two connecting plates 62, the two ear plates 361 and the first strip-shaped hole 611. A fastener 63 penetrates through the two connecting plates 62 and the second strip-shaped hole 612, so that the force on the connecting rod 31 is transmitted to the connecting plate 62 through the pin shaft 37, and the connecting plate 62 is in frictional contact with the truss plate 61. The fastener 63 is a friction-type high-strength bolt.

[0224] That is, the force transmission path between the connector 36 and the truss plate 61 is: the force on the connector 36 is transmitted to the pin shaft 37, the pin shaft 37 transmits it to the connecting plate 62, and a large static friction force is generated between the connecting plate 62 and the truss plate 61 by the pre-tightening force applied by the friction-type high-strength bolt, and this friction force is finally transmitted to the truss plate 61.

[0225] When the vertical position of the pin shaft 37 is adjusted in the first strip-shaped hole 611, the fastener 63 also adaptively moves vertically in the second strip-shaped hole 612 to make up for the vertical coordinate difference.

[0226] Anti-friction positioning plates 64 are clamped between the two ear plates 361 and the corresponding connecting plates 62, and the pin shaft 37 penetrates through the anti-friction positioning plates 64. The combination of the pin shaft 37 and the anti-friction positioning plates 64 is to ensure the hinged connection performance between the connecting rod 31 and the truss structure 1, more easily accept the deformation difference between the rigid truss structure 1 and the flexible cable group 2, and prevent large deformation internal forces from being generated in the connecting rod 31.

[0227] Wearable elements 65 are clamped between the two connecting plates 62 and the truss plate 61, and the fastener 63 penetrates through the wearable elements 65. Under the action of strong wind during the use stage, the wearable elements 65 unload force and dissipate energy through sliding, improve the wind resistance performance of the structure, and ensure the structural safety.

[0228] Preferably, the wearable element 65 includes a friction energy dissipation plate, which can provide a large friction force to resist external forces such as strong wind.

[0229] Furthermore, in this embodiment, a sensor is arranged at the connection node between the side-span connection assembly and the truss structure 1. The sensor is used to detect the deformation and / or pre-tightening force at the connection node. When it senses phenomena such as large deformation at the connection node position or relaxation of the pre-tightening force, it can give real-time feedback so as to replace the wearable element 65 in time. Exemplarily, the sensor includes a force sensor and / or a deformation sensor, and can be arranged on the truss plate 61 or at positions such as the connector 26.

[0230] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Construction method for large-span structure with rigid-flexible parallel connection, characterized in that, The long-span structure includes a rigid-flexible parallel structure and a strip structure. The rigid-flexible parallel structure includes a truss structure (1) and a cable structure. The cable structure includes a plurality of cable groups (2) arranged side by side. The strip structure includes a plurality of connection components (3) connected in series. The construction method of the long-span rigid-flexible parallel structure includes: S1. Construct the rigid-flexible parallel structure; S2. Construct the strip structure; Step S1 includes: S11. Establish a simulation model of the rigid-flexible parallel structure, refine the rigid-flexible parallel structure and all additional structures installed thereon, as well as the connection nodes between components according to the design construction drawings, and clarify the actual size and distribution of all dead loads on the rigid-flexible parallel structure; S12. Aiming at the rigid-flexible parallel structure reaching the design form under the action of dead load, determine the zero-stress form of the truss structure (1) through the iterative form-finding analysis method; There are vertical deformation differences ΔZ, horizontal deformation differences ΔY and axial deformation differences ΔX between the zero-stress form of the truss structure (1) and the design form; S13. Compensate the vertical deformation difference ΔZ, the horizontal deformation difference ΔY of the truss structure (1) and selectively compensate the axial deformation difference ΔX, so that the truss structure (1) fits the zero-stress form, and hoist the compensated truss structure (1) in place at high altitude; S14. Hoist the non-tension end of the cable group (2) in place, use the first tensioning unit (71) to tow the tensioning end of the cable group (2) to complete the preset tensioning stroke, and then finely adjust the cable shape of each cable (22) in the cable group (2) and tension it in place through the second tensioning unit (72); S15. Repeat step S14 to install and tension all cable groups (2) of the cable structure in place; Step S2 includes: S21. Assemble the integral connection component (3) in the factory; The connection component (3) includes a connection rod (31), a TMD arranged on the connection rod (31), and an enclosure system (32) surrounding the connection rod (31). A mass regulator (33) is arranged on the TMD, and a first position fine-tuning device (34) is connected between the enclosure system (32) and the connection rod (31); S22. Install the connection component (3) between the cable clamps (21) of two adjacent cable groups (2); S23. Install the anti-tilting device (4). The anti-tilting device (4) is connected to the connection component (3) and the cable clamp (21) to prevent the cable group (2) from tilting; after the connection components (3) symmetrically arranged on both sides of the same cable clamp (21) are all installed in place, remove the anti-tilting device (4) on the first installed connection component (3), and there is no need to install the anti-tilting device (4) between the later installed connection component (3) and the cable clamp (21); S24. After the connection components (3) on adjacent multiple cable groups (2) are installed, adjust the horizontal position and vertical position of the enclosure system (32) relative to the connection rod (31) through the first position fine-tuning device (34) to make the corresponding multiple enclosure systems (32) flush; S25, constructing a retaining and gap-filling section (5) between two adjacent connecting components (3); S26, fine-tuning the mass of the TMD to an ideal mass by the mass regulator (33); S27. Finely adjust the position of the connection component (3) relative to the cable structure and the truss structure (1) in the horizontal and vertical directions so that the rigid-flexible parallel structure reaches the designed shape.

2. The construction method of the large-span structure with rigid-flexible parallel connection according to claim 1, characterized in that Step S13 includes: S131, comprehensively designing the truss structure (1) by combining the horizontal coordinates of the design and construction drawing and the vertical coordinates of the zero stress form or comprehensively designing the horizontal coordinates of the design and construction drawing and the vertical coordinates and axial coordinates of the zero stress form, and issuing a comprehensive design drawing accordingly to guide the factory in processing the truss section (11) of the truss structure (1) to complete the compensation of the vertical deformation difference ΔZ or complete the comprehensive compensation of the vertical deformation difference ΔZ and the axial deformation difference ΔX; S132, compensating the horizontal deformation difference ΔY of the truss structure (1): transporting the truss segments (11) processed in the factory to the construction site for assembly, and performing horizontal coordinate compensation on the connection points between the truss segments (11) according to the zero stress form during assembly, so that the assembled truss structure (1) matches the zero stress form.

3. The construction method of the large-span structure with rigid-flexible parallel connection according to claim 1, characterized in that, In step S27, the connection component (3) between the truss structure (1) and the cable structure is a side span connection component, and the side span connection component includes a length-adjustable segment (35), and the length-adjustable segment (35) is used to compensate for the horizontal coordinate difference of the rigid-flexible parallel structure; A vertically adjustable structure (6) is provided at a connection node between the side span connection component and the truss structure (1), and the vertically adjustable structure (6) is used to compensate for the vertical coordinate difference of the rigid-flexible parallel structure.

4. The construction method of the large-span structure with rigid-flexible parallel connection according to claim 3, characterized in that, The connecting rod (31) of the side span connecting assembly is connected to the connecting head (36) through the length adjustable section (35), the vertical adjustable structure (6) includes a truss plate (61) arranged on the truss structure (1), the truss plate (61) is provided with a first strip hole (611) and a second strip hole (612) in the vertical direction, the truss plate (61) is clamped between the two ear plates (361) of the connecting head (36), and the two ear plates (361) are provided with a connecting plate (62) on the side facing away from each other, the pin shaft (37) passes through the two connecting plates (62), the two ear plates (361) and the first strip hole (611), and the fastener (63) passes through the two connecting plates (62) and the second strip hole (612), so that the force of the connecting rod (31) is transmitted to the connecting plate (62) through the pin shaft (37), and the connecting plate (62) is in friction contact with the truss plate (61); A friction-reducing positioning plate (64) is sandwiched between the two ear plates (361) and the corresponding connecting plate (62), and the pin shaft (37) passes through the friction-reducing positioning plate (64); A consumable element (65) is clamped between each of the two connecting plates (62) and the truss plate (61), and the fastener (63) penetrates through the consumable element (65).

5. The construction method of the large-span structure with rigid-flexible parallel connection according to claim 1, characterized in that, In step S14, multiple stay cables (22) of the stay cable group (2) are connected through a tensioning tooling (73). Each stay cable (22) includes a cable body (221) and a cable head (222) arranged at the end of the cable body (221). A plurality of connecting ear plates (81) corresponding to the stay cables (22) one by one are arranged on the end main structure (8). The connecting ear plates (81) are used to connect with the cable heads (222) after the corresponding stay cables (22) are tensioned in place. The tensioning tooling (73) is located on the side of the cable head (222) facing away from the connecting ear plate (81); The first tensioning unit (71) includes a winding device (711) around which a steel wire rope (712) is wound. The steel wire rope (712) is connected to the tensioning tooling (73). The winding device (711) tensions the stay cable group (2) by winding and unwinding the steel wire rope (712); The second tensioning unit (72) includes a two-way lifting device (721) and a telescopic adjusting device (722). The two-way lifting device (721) is installed on the end main structure (8) and is connected to the tensioning tooling (73). One adjusting device (722) is arranged on the tensioning tooling (73) corresponding to each stay cable (22). The telescopic end of the adjusting device (722) is connected to the cable head (222).

6. The construction method of the large-span structure with rigid-flexible parallel connection according to claim 5, characterized in that Step S14 includes: S141. The tensioning tooling (73), the first tensioning unit (71), and the second tensioning unit (72) are installed in place; S142. Start the winding device (711) to tow the stay cable group (2) close to the connecting ear plate (81) through the steel wire rope (712); S143. When the cable head (222) of the stay cable (22) approaches the connecting ear plate (81), the winding device (711) stops operating and is locked by a safety locking device; S144. Connect the two-way lifting device (721) and the tensioning tooling (73); S145. Start the two-way lifting device (721) to gradually transfer the tension force to the two-way lifting device (721); S146. Adjust the cable head (222) so that it can smoothly enter the connecting ear plate (81); S147. After the cable shape of any one of the stay cables (22) in the stay cable group (2) is in place, drive the cable shapes of the remaining stay cables (22) in place through the adjusting device (722); S148. Record the distance between the pin holes on the cable head (222) of each stay cable (22) and the pin holes on the corresponding connecting ear plate (81) as the cable length adjustment amount of the stay cable (22); S149. Fine-tune each stay cable (22) according to the cable length adjustment amount; S1410, after the length adjustment of all the cables (22) is completed, tensioning is continued through the bidirectional lifting device (721) and the adjusting device (722), and a fixed pin shaft component is installed after the pin hole of the cable head (222) is aligned with the corresponding pin hole on the connecting ear plate (81); S1411, after all the cable heads (222) are connected to the corresponding connecting ear plates (81) via the pin components, the bidirectional lifting device (721) gradually unloads the tensioning force so that the tensioning force is transferred to the position of the pin components; S1412. Dismantle the first tensioning unit (71) and the second tensioning unit (72).

7. The construction method of the large-span structure with rigid-flexible parallel connection according to any one of claims 1-6, characterized in that The method further comprises step S140: controlling the shape of the cable group (2) based on the temperature sensitivity of the cable group (2), and step S140 comprises: S1401, tensioning the first cable group (2) on a cloudy day when the temperature difference does not exceed a preset range, and placing a temperature sensor on the cable group (2), and modifying the cable shape according to the cable shape-temperature relationship determined by theoretical analysis; S1402, after completing the tensioning of the first cable group (2) according to the modified cable shape, conduct real-time monitoring for at least 24 hours to obtain a measured curve of the cable shape-temperature relationship, and compare it with the theoretical cable shape-temperature relationship. Based on the measured and theoretical data, formulate a cable shape-temperature mapping function, and perform secondary fine adjustment on the first cable group (2) according to the mapping function; S1403, the cable shape of the cable group (2) installed thereafter is tensioned based on the real-time measured cable shape of the adjacent cable group (2), and no real-time temperature measurement and correction is performed.

8. The construction method of the large-span structure with rigid-flexible parallel connection according to any one of claims 1-6, characterized in that, In step S21, the mass regulator (33) includes a liquid storage container (331) and a liquid guide tube (332), one end of the liquid guide tube (332) is connected to the liquid storage container (331), and the other end is connected to a suction port (333); In step S25, the process further includes: constructing a flexible joint (30) between the enclosure gap filling section (5) and the connection component (3), wherein the suction and irrigation port (333) is flush with the flexible joint (30) and exposed; In step S26, liquid (335) is poured into or drawn out of the liquid storage container (331) through the suction port (333) until the TMD reaches the ideal quality.

9. The construction method of the large-span structure with rigid-flexible parallel connection according to any one of claims 1-6, characterized in that In step S21, the enclosure system (32) includes an enclosure truss (321) and an enclosure plate (322), the enclosure plate (322) is covered on the outside of the enclosure truss (321), and the first position fine adjustment device (34) includes a horizontal adjustment member (341) and a vertical adjustment member (342); A support plate (38) is provided on the connecting rod (31), a load-bearing plate (39) is provided on the support plate (38), the load-bearing plate (39) includes a horizontal plate (391) and a vertical plate (392) which are vertically connected, the horizontal adjusting member (341) is threadedly connected to the retaining truss (321) and can push the vertical plate (392) along the X direction, the vertical adjusting member (342) is threadedly connected to the retaining truss (321) and can push the horizontal plate (391) vertically, and the X direction is the width direction of the connecting rod (31).

10. The construction method of the large-span structure with rigid-flexible parallel connection according to any one of claims 1-6, characterized in that, In step S23, the anti-tilting device (4) includes a rigid rod (41), a first bolt (42) and a second bolt (43), the extending direction of the rigid rod (41) is the same as the extending direction of the connecting rod (31), a first connecting member (311) is provided on the connecting rod (31), and a second connecting member (211) is provided on the cable clamp (21); The rigid rod (41) is connected to the first connecting member (311) through the first bolt (42), the axis of the first bolt (42) is parallel to the connecting rod (31), a first oblong hole (411) is formed in the rigid rod (41) along its length direction, the axis of the second bolt (43) is perpendicular to the rigid rod (41), and the second bolt (43) penetrates through the second connecting member (211) and the first oblong hole (411); The second bolt (43) is a friction-type high-strength bolt.

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