Large-span wood arch and wood secondary beam connecting joint and construction method thereof

Abstract

The invention relates to a large-span wood arch and wood secondary beam connecting joint and a construction method thereof. The joint comprises a main wood arch, a wood secondary beam, a steel box cushion block and T-shaped connecting pieces, wherein the main wood arch is composed of two wood arch components, a U-shaped groove and an inserting groove are formed in the end of the wood secondary beam, the steel box cushion block is clamped between the two wood arches, and the T-shaped connecting pieces are symmetrically arranged on the two sides of the main wood arch. Flange plates of the T-shaped connecting pieces are embedded in the mounting grooves of the main wood arch, and web plates of the T-shaped connecting pieces are inserted into the inserting grooves of the secondary wood beams. The first connecting assembly adopts a long bolt to vertically penetrate through the main wood arch, the T-shaped connecting piece flange and the steel box cushion block to tightly tie the main wood arch, the T-shaped connecting piece flange and the steel box cushion block; the second connecting assembly comprises an interference fit steel pin with the middle being embossed and a self-drilling high-strength screw, and the second connecting assembly transversely penetrates through the wood secondary beam and the T-shaped piece web to form anti-shear-torsion composite connection. Wherein a flange plate of the T-shaped connecting piece is provided with a connecting hole, the diameter of the connecting hole is 1mm larger than that of the long bolt, a web is provided with a pin hole, the diameter of the pin hole is equal to that of the steel pin, and the length of the steel pin is equal to the width of the wood secondary beam. The connecting joint can meet the stress requirement that the wood secondary beam bears the combined action of vertical force and torque, and the attractive building effect can be achieved.

Description

Technical Field

[0001] This invention relates to the field of large-span timber structure building technology, and in particular to a connection node between a large-span timber arch and a secondary timber beam and its construction method. Background Technology

[0002] With the promotion of green and low-carbon building concepts, large-span timber structures are increasingly used in public buildings such as stadiums and exhibition centers. Glulam, due to its excellent compressive strength along the grain, is often used to construct arched structures to span large spaces. In these structures, secondary timber beams perpendicular to the main arch are required to support the roof system.

[0003] Traditional large-span timber structures often use exposed steel connecting plates and high-strength bolts to connect the main and secondary beams. Although this method has a high assembly rate, it has obvious drawbacks: First, the exposed steel plates, bolt heads, and other metal parts damage the texture of the wood itself and the overall aesthetics of the building, making it difficult to meet the interior decoration requirements of high-end venues. Second, errors are inevitable in the processing and installation of timber structural components, and exposed joints are extremely sensitive to construction precision. Errors can easily lead to connection difficulties or appearance defects. Summary of the Invention

[0004] The purpose of this invention is to provide a connection node between a large-span wooden arch and a secondary wooden beam and its construction method, which can not only meet the structural stress requirements, but also achieve an aesthetically pleasing architectural effect, and facilitate precise on-site installation.

[0005] To achieve the above objectives, the present invention provides a connection node between a large-span wooden arch and a secondary wooden beam, comprising:

[0006] The main wooden arch consists of two parallel wooden arch members spaced apart.

[0007] The wooden secondary beam has an upward-facing U-shaped groove on its end face, and the inner wall of the U-shaped groove has an insertion groove along the axis of the wooden secondary beam.

[0008] A steel box pad is sandwiched between the two wooden arch components;

[0009] Two T-shaped connectors are symmetrically arranged on opposite sides of the main wooden arch. The outer surfaces of the two wooden arch members are provided with mounting grooves. The flanges of the T-shaped connectors are embedded in the corresponding mounting grooves. The webs of the T-shaped connectors extend outward perpendicular to their flanges and are used to insert into the corresponding insertion slots.

[0010] The first connecting component extends through the flanges of the two wooden arch members, the two T-shaped connectors, and the steel box pad along a direction perpendicular to the outer side of the wooden arch member;

[0011] The second connecting component, along a direction perpendicular to the axis of the secondary timber beam, enters from the side of the secondary timber beam and passes through the web of the T-shaped connector.

[0012] Optionally, the outer surface of the flange plate of the T-shaped connector is flush with the outer surface of the wooden arch member.

[0013] Optionally, the first connecting assembly includes several long bolts and several nuts. Connecting holes are correspondingly opened on the flange plates of the two wooden arch members, the two T-shaped connectors, and the steel box pad. The long bolts pass through the corresponding connecting holes on the flange plates of one T-shaped connector, one wooden arch member, the steel box pad, the wooden arch member on the other side, and the flange plates of the other T-shaped connector in a direction perpendicular to the outer side of the wooden arch member, and are then locked by the nuts.

[0014] Optionally, the nut is located within the U-shaped groove.

[0015] Optionally, the second connecting component includes several steel pins. The webs of the secondary wooden beam and the T-shaped connector are respectively provided with pin holes. The diameter of the pin hole on the secondary wooden beam is 1 mm larger than the diameter of the steel pin. The diameter of the pin hole on the web of the T-shaped connector is equal to the diameter of the steel pin. The steel pin passes through the web of the secondary wooden beam and the corresponding pin hole on the secondary wooden beam from the side along a direction perpendicular to the axis of the secondary wooden beam. The length of the steel pin is equal to the width of the secondary wooden beam.

[0016] Optionally, the middle section of the steel pin is embossed, and the outer diameter of the embossed middle section of the steel pin is larger than the diameter of the steel pin. After the steel pin is driven in, it is in close contact with the hole wall of the web of the T-shaped connector to prevent the steel pin from loosening and falling off.

[0017] Optionally, the second connecting assembly further includes a plurality of self-drilling high-strength screws, which are screwed into the side of the secondary timber beam and through the web of the T-shaped connector.

[0018] Optionally, one side of the secondary wooden beam is provided with a countersunk hole, and the nut of the self-drilling high-strength screw is accommodated in the countersunk hole.

[0019] Based on this, the present invention also provides a construction method for the connection node between a large-span wooden arch and a secondary wooden beam as described above, wherein the large-span wooden arch comprises multiple parallel main wooden arches, and the secondary wooden beam is erected between two adjacent main wooden arches, comprising the following steps:

[0020] Using the first connecting assembly, steel box pads are installed between the two wooden arch members of each main wooden arch, and T-shaped connectors are installed on opposite sides of each main wooden arch.

[0021] Lift the secondary wooden beam from below the large-span wooden arch, raising both ends of the secondary wooden beam synchronously until the webs of the T-shaped connectors on both sides are aligned and inserted into the insertion slots at both ends of the secondary wooden beam.

[0022] A second connecting component is installed from the side of the secondary wooden beam to complete the fixed connection between the secondary wooden beam and the T-shaped connector.

[0023] Optionally, a steel structural bracing is pre-installed between the two wooden arch members of the main wooden arch, and the step of lifting the secondary wooden beam from below the large-span wooden arch includes:

[0024] Temporary hanging steel arms are installed on the steel structure web members of the main wooden arches on both sides respectively;

[0025] Install small lifting devices on each of the temporary suspended steel arms;

[0026] The small lifting device is used to lift both ends of the wooden secondary beam simultaneously.

[0027] The connection node between a large-span wooden arch and a secondary wooden beam, and its construction method provided by this invention, have at least one of the following beneficial effects:

[0028] 1) Excellent Architectural Aesthetics: By embedding the flange of the T-shaped connector into the mounting groove on the side of the wooden arch and further flushing its outer surface with the outer surface of the wooden arch, the visual abruptness of exposed steel plates in traditional joints is successfully eliminated. Simultaneously, the nuts of the first connecting component are accommodated in the U-shaped groove on the end face of the secondary wooden beam, while the second connecting components (such as steel pins and self-drilling high-strength screws) are all installed from the side of the secondary wooden beam, with the screw heads sunk into pre-set countersunk holes, and both ends of the steel pin flush with the surface of the secondary wooden beam. These designs collectively ensure that from any interior viewpoint, no bolts, steel plates, nuts, or other metal parts are exposed in the connection area, fully showcasing the natural texture of the wood and the pure form of the structure, perfectly meeting the stringent requirements for interior aesthetics in high-end stadium-type buildings.

[0029] (2) Superior structural performance: The connection node adopts a composite force transmission path: The first connection component (long bolt) tightly connects the main wooden arch, steel box pad, and T-shaped connector flange plate to form a high-strength, high-rigidity integral node core, effectively transmitting the internal force of the main arch. In the second connection component, the steel pin passes through in a direction perpendicular to the axis of the secondary wooden beam, mainly bearing and efficiently transmitting the shear force between the secondary wooden beam and the web of the T-shaped component; while the self-drilling high-strength screw mainly provides the secondary wooden beam with torsional restraint and the pull-out force it generates. The two work together to solve the problem of the actual torque bearing in the hinged design at both ends of the secondary wooden beam, so that the node has higher stiffness, strength and fatigue resistance, and good long-term reliability.

[0030] (3) Construction-friendly and high-precision: The specialized construction method cleverly utilizes the structural body (steel structure web members) as lifting points, eliminating the need for additional high-altitude scaffolding or large tower cranes, thus reducing the cost and complexity of the construction. The bottom-up lifting method and the visualized docking process make the construction precision controllable and adjustable, effectively absorbing minor errors in component processing and construction, ensuring that the high precision requirements of the "hidden" connection nodes are met, and improving the installation success rate.

[0031] (4) Good economic efficiency and scalability: The node components (steel box pads, T-type connectors, bolts, pins and screws) are all conventional building materials, and the installation and construction processes are easy to master, with broad engineering application prospects. Attached Figure Description

[0032] Those skilled in the art will understand that the accompanying drawings are provided to better understand the invention and do not constitute any limitation on the scope of the invention. Wherein:

[0033] Figure 1 This is a schematic diagram of a large-span wooden arch structure provided in an embodiment of the present invention;

[0034] Figure 2 This is an overall schematic diagram of the connection node between a large-span wooden arch and a secondary wooden beam, provided in an embodiment of the present invention.

[0035] Figure 3 This is a partially enlarged view of the connection node between a large-span wooden arch and a secondary wooden beam according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the end of a secondary wooden beam provided in an embodiment of the present invention;

[0037] Figure 5 This is a top view of the connection node between a wooden arch and a secondary wooden beam according to an embodiment of the present invention;

[0038] Figure 6 for Figure 5 Cross-sectional view along the AA direction;

[0039] Figure 7 for Figure 5 Cross-sectional view along the BB direction;

[0040] Figure 8 for Figure 6 Cross-sectional view along the CC direction;

[0041] Figure 9 This is a schematic diagram of the embossing of a steel pin according to an embodiment of the present invention;

[0042] Figure 10 This is a front view of the connection between the steel structure web members and the temporary hanging steel arm according to an embodiment of the present invention;

[0043] Figure 11 This is a top view of the connection between the steel structure web members and the temporary hanging steel arm provided in an embodiment of the present invention;

[0044] Figure 12 This is a schematic diagram of clamping a wooden secondary beam according to an embodiment of the present invention.

[0045] The attached figures are labeled as follows:

[0046] 100-Main wooden arch; 110-Wooden arch component; 111-Installation groove; 200-Secondary wooden beam; 210-U-shaped groove; 220-Interlocking groove; 300-Steel box pad; 400-T-type connector; 510-Long bolt; 520-Nut; 610-Steel pin; 611-Embossing; 620-Self-drilling high-strength screw; 700-Steel structure web member; 710-Connecting plate; 800-Temporary hanging steel arm; 810-Small lifting equipment; 820-Wire rope; 900-Clamping component; 910-Flexible gasket; 920-Wire rope hole. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0049] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] Furthermore, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes said element. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] Please refer to Figures 1-8 This invention provides a connection node between a large-span wooden arch and a secondary wooden beam, comprising:

[0052] The main wooden arch 100 includes two parallel wooden arch members 110 with a distance between them;

[0053] The secondary wooden beam 200 has an upward-facing U-shaped groove 210 on its end face, and an insertion groove 220 is provided on the inner wall of the U-shaped groove 210 along the axis of the secondary wooden beam 200.

[0054] A steel box pad 300 is sandwiched between two wooden arch components 110;

[0055] Two T-shaped connectors 400 are symmetrically arranged on opposite sides of the main wooden arch 100. The outer surfaces of the two wooden arch members 110 are provided with mounting grooves 111. The flanges of the T-shaped connectors 400 are embedded in the corresponding mounting grooves 111. The web of the T-shaped connectors 400 extends outward perpendicular to its flanges and is used to insert into the insertion slots 220 of the corresponding secondary wooden beams 200.

[0056] The first connecting component extends through the flanges of the two wooden arch members 110, the two T-shaped connectors 400, and the steel box pad 300 in a direction perpendicular to the outer side of the wooden arch member 110.

[0057] The second connecting component, along a direction perpendicular to the axis of the secondary timber beam 200, enters from the side of the secondary timber beam 200 and passes through the web of the T-shaped connector 400.

[0058] The core of this large-span wooden arch and secondary wooden beam connection node lies in the fact that all connectors are completely hidden inside the wood or between the interfaces through an embedded and plug-in connection structure, thereby achieving an architectural effect where no bolts or steel plates are visible on the exposed surface.

[0059] Firstly, in a long-span timber arch structure, multiple parallel main timber arches 100 are usually used as main beams in the main span direction, and several secondary timber beams 200 are set perpendicular to the timber arch direction. These secondary timber beams 200 are erected between two adjacent main timber arches 100. The interior architectural effect requires that the main timber arches 100 and the secondary timber beams 200 be exposed.

[0060] In this embodiment, the main wooden arch 100 is composed of two parallel wooden arch members 110 spaced a certain distance apart. The wooden arch members 110 include, but are not limited to, glued laminated timber, and may also be cross-laminated timber (CLT) or high-performance composite engineered timber, the curvature and size of which are determined according to the building span design.

[0061] The steel box pad 300 is usually made of steel plates welded into a box shape and fixedly clamped between two wooden arch members 110. The thickness of the steel box pad 300 is determined by the spacing between the wooden arch members 110.

[0062] In this embodiment, the secondary wooden beam 200 is erected between two adjacent main wooden arches 100. To achieve a concealed connection, such as... Figure 4 and Figure 8 As shown, the end of the secondary timber beam 200 is precision-machined: a U-shaped groove 210 with an upward opening is machined on its end face, meaning the groove in the secondary timber beam 200 is a through hole on the top surface but not on the bottom surface. The depth and width of this U-shaped groove 210 are designed according to the size of the nuts to be accommodated later. Crucially, on an inner wall of this U-shaped groove 210 away from the main timber arch 100, a narrow and elongated insertion groove 220 is further machined along the axis (i.e., its length) of the secondary timber beam 200. The width of this insertion groove 220 matches the thickness of the web of the T-shaped connector 400, while its depth is slightly greater than the insertion depth of the web of the T-shaped connector 400.

[0063] Two T-shaped connectors 400 are symmetrically arranged on both sides of the main timber arch 100. The T-shaped connectors 400 are welded from flange plates and web plates, typically made of steel. On the outer surface of each timber arch member 110, corresponding to the position of the flange plate of the T-shaped connector 400, a mounting groove 111 is pre-machined. The depth of this mounting groove 111 is equal to or slightly greater than the thickness of the flange plate, and its area is the same as that of the flange plate. During installation, the flange plate of the T-shaped connector 400 is completely embedded into this mounting groove 111.

[0064] Preferably, after the flange plate of the T-shaped connector 400 is embedded, its outer surface is flush with the outer surface of the wooden arch member 110, making the steel plate completely invisible from the outside, thus achieving a perfect concealment effect. The web plate of the T-shaped connector 400 extends horizontally outward and is inserted into the insertion groove 220 of the wooden secondary beam 200.

[0065] In this embodiment, the first connecting assembly is used to fasten the main wooden arch 100, the steel box pad 300, and the T-shaped connector 400 into a whole. In a preferred embodiment, as shown... Figures 5-7 As shown, the first connecting assembly includes several long bolts 510 and several nuts 520. Connecting holes are correspondingly provided on the flanges of the two wooden arch members 110, the two T-shaped connectors 400, and the steel box pad 300. The long bolts 510 sequentially pass through the corresponding connecting holes on the flanges of one T-shaped connector 400, one wooden arch member 110, the steel box pad 300, the other wooden arch member 110, and the flanges of the other T-shaped connector 400 along a direction perpendicular to the outer surface of the wooden arch member 110, and are then locked in place by the nuts 520. The long bolts 510 provide a strong clamping force, ensuring a tight connection between the wooden arch member 110, the T-shaped connector 400, and the steel box pad 300, thus guaranteeing the integrity of the joint. In this embodiment, the diameter of the openings on the flanges of the steel box pad 300 and the T-shaped connector 400 is 1 mm larger than the diameter of the long bolts 510.

[0066] Preferably, the nut 520 is located within the U-shaped groove 210. That is, when the secondary timber beam 200 is installed in place, the nut 520 (or bolt head) protruding from both ends of the long bolt 510 is precisely located within the cavity formed by the U-shaped groove 210 on the end face of the secondary timber beam 200. Therefore, whether viewed from below or from the side, the bolt head is completely concealed by the wood, achieving a better hiding effect. It should be noted that the nuts 520 on the two T-shaped connectors 400 on opposite sides of the same main timber arch 100 can be accommodated by the U-shaped grooves 210 on the ends of the two secondary timber beams 200 on either side of the main timber arch 100.

[0067] The second connecting assembly is used to fix the secondary timber beam 200 to the web of the T-shaped connector 400. In a preferred embodiment, the second connecting assembly includes several steel pins 610. Corresponding pin holes are provided on the webs of the secondary timber beam 200 and the T-shaped connector 400. The diameter of the pin hole on the secondary timber beam 200 is 1 mm larger than the diameter of the steel pin 610. The diameter of the pin hole on the web of the T-shaped connector 400 is equal to the diameter of the steel pin 610. The steel pins 610, perpendicular to the axis of the secondary timber beam 200, pass through the side of the secondary timber beam 200 and through the web of the T-shaped connector 400 and the corresponding pin hole on the secondary timber beam 200. The length of the steel pin 610 is equal to the width of the secondary timber beam 200. The steel pins 610 mainly bear the shear force between the secondary timber beam 200 and the T-shaped connector, making them a highly efficient shear-resistant connector.

[0068] To further improve the reliability of this pin connection and prevent loosening under long-term vibration or minor deformation, the middle section of the steel pin 610 is embossed 610. After being driven in, the steel pin 610 makes tight contact with the hole wall of the web plate of the T-shaped connector 400 to prevent it from loosening and falling off. After embossing, the diameter of this section is slightly larger than the diameter of the pin hole (e.g., 0.3-0.8 mm larger), forming a slight interference fit. A certain amount of force is required when driving it in. After driving in, the embossed 610 and the hole wall of the steel plate are squeezed and engaged, resulting in high initial stiffness of the connection and greatly enhancing the anti-loosening ability.

[0069] Because the wooden arches in large-span structures are often not planar, and the arrangement of the secondary wooden beams 200 is also not planar, but usually perpendicular to the tangent direction of the wooden arch structure, the secondary wooden beams 200 may actually bear lateral forces and torque, causing them to twist. Furthermore, considering that the steel pins 610 are not tightened by nuts 520, there is a risk of cracking at the grooves of the secondary wooden beams 200 and the steel pins being pulled out over time. Therefore, after the steel pins 610 are installed, several self-drilling high-strength screws 620 can be vertically screwed in from the same side or the other side of the secondary wooden beams 200. The tips of the self-drilling high-strength screws 620 can drill threads on the web of the T-connector 400 on their own, eliminating the need for pre-tapping the web, making construction extremely convenient. These screws mainly provide axial gripping force and pull-out resistance, effectively limiting the lifting and rotation of the secondary wooden beams 200 relative to the web, thereby resisting torque.

[0070] Preferably, the side of the secondary wooden beam 200 is provided with a countersunk hole, into which the nut 520 of the self-drilling high-strength screw 620 is accommodated. The nut 520 of the self-drilling high-strength screw 620 is finally sunk into the countersunk hole. After completion, the countersunk hole can be sealed with wood wax, putty, or a small wooden plug of the same color as the wood, thus achieving a concealed installation of the screw. In this embodiment, the length of the self-drilling high-strength screw 620 is less than 10% of the width of the secondary wooden beam 200. The self-drilling high-strength screw 620 is drilled from one side of the secondary wooden beam 200, passes through the web of the T-shaped connector 400, and enters the other side of the secondary wooden beam 200, but does not penetrate the other side of the secondary wooden beam 200.

[0071] By adopting a pin-nail composite connection, the division of labor is clear and the collaboration is efficient. The steel pin 610 mainly bears the shear force, while the self-drilling high-strength screw 620 provides pull-out and torsional constraints. The two work together to give the node higher stiffness, strength and fatigue resistance, and can effectively resist the torsion of the secondary wooden beam 200, resulting in better reliability.

[0072] Due to the special structure of the connection node between the large-span wooden arch and the secondary wooden beam (the bottom surface of the end of the secondary wooden beam 200 is an opaque U-shaped groove 210), it is impossible to use the traditional "top-down" hoisting method for placement. Therefore, this embodiment of the invention also provides a construction method for the connection node between the large-span wooden arch and the secondary wooden beam as described above, including the following steps:

[0073] S1. Using the first connecting assembly, steel box pads 300 are installed between the two wooden arch members 110 of each main wooden arch 100, and T-shaped connectors 400 are installed on opposite sides of each main wooden arch 100.

[0074] S2. Lift the secondary wooden beam 200 from below the large-span wooden arch, so that both ends of the secondary wooden beam 200 are lifted simultaneously until the webs of the T-shaped connectors 400 on both sides are aligned and inserted into the insertion slots 220 at both ends of the secondary wooden beam 200.

[0075] S3. Install the second connecting component from the side of the secondary timber beam 200 to complete the fixed connection between the secondary timber beam 200 and the T-shaped connector 400.

[0076] First, execute S1 to complete the installation of the main arch structure. Secure the main timber arch 100, steel box pads 300, and T-shaped connectors 400 to the design position using the first connecting assembly and hoist them into place. Typically, in long-span tensioned timber arch structures, a steel structural web member 700 is provided between two timber arch members 110 to form a stable truss. The steel box pads 300 can be pre-welded to this steel structural web member 700.

[0077] During the factory prefabrication stage, coaxial connection holes are precisely drilled at corresponding positions on the flanges of the two wooden arch members 110, the two T-shaped connectors 400, and the steel box pad 300. During on-site installation, long bolts 510 are inserted from one side in the following order: through the connection hole on the flange of one T-shaped connector 400 → through the connection hole on the wooden arch member 110 on that side → through the connection hole on the steel box pad 300 → through the connection hole on the wooden arch member 110 on the other side → and finally through the connection hole on the flange of the other T-shaped connector 400. Nuts 520 are then screwed onto the ends of the bolts and the designed torque is applied for tightening.

[0078] Then, execute S2 to lift the secondary timber beam 200 from below the large-span wooden arch, raising both ends of the secondary timber beam 200 synchronously until the webs of the T-shaped connectors 400 on both sides are aligned and inserted into the insertion slots 220 at both ends of the secondary timber beam 200. Specifically, this includes:

[0079] Temporary hanging steel arms 800 are installed on the steel structure web members 700 of the main wooden arches 100 on both sides respectively;

[0080] Install small lifting devices 810 on each temporary suspended steel boom 800;

[0081] The small lifting equipment 810 was used to simultaneously lift both ends of the wooden secondary beam 200.

[0082] This step makes full use of the existing steel structure web members 700. On the steel structure web members 700 that have been installed on both sides, a temporary hanging steel arm 800 that extends horizontally outward is detachably connected. At the end of each temporary hanging steel arm 800, a small lifting device 810, such as a light winch or electric hoist, is installed.

[0083] Place the secondary wooden beam 200 horizontally on the ground, ensuring that the openings of the U-shaped grooves 210 at both ends face upwards, and secure the secondary wooden beam 200 with lifting straps or special clamps.

[0084] Simultaneously start two small lifting devices 810, and lift the two ends of the wooden secondary beam 200 smoothly and synchronously upwards by lifting wire rope 820. The lifting speed should be slow and controllable.

[0085] By observing the proximity of the ends of the secondary wooden beam 200 to the web of the T-shaped connectors 400 extending from both sides, and by finely adjusting the speed of the two small lifting devices 810, the horizontality and lateral position of the secondary wooden beam 200 can be easily controlled, so that the ends of the webs of the T-shaped connectors 400 are accurately aligned with the insertion slots 220 and inserted until the secondary wooden beam 200 reaches the design elevation.

[0086] Once the secondary wooden beam 200 is installed in place, the nuts 520 protruding from both ends of the long bolt 510 are precisely positioned within the cavity formed by the U-shaped groove 210 on the end face of the secondary wooden beam 200. Therefore, whether viewed from below or from the side, the bolt ends are completely concealed by the wood, achieving a hiding effect.

[0087] To achieve a smooth and synchronous lifting of the 200mm secondary wooden beam, this embodiment employs a dedicated temporary suspension system. The core of this system is the symmetrically arranged temporary suspension steel arms 800mm. For example... Figures 10-12 As shown, the temporary suspended steel arm 800 is made of H-beams and has good bending resistance. Three connecting plates 710 are pre-fixed (e.g., welded) to the steel structure web members 700 installed between the main wooden arches 100. Each connecting plate 710 has multiple sets of bolt holes. The flange plates and web plates of the temporary suspended steel arm 800 are respectively provided with multiple sets of bolt holes corresponding to the connecting plates 710. High-strength bolts are used to connect and fasten the connecting plates 710 to the two flange plates and the web plates of the temporary suspended steel arm 800.

[0088] In a preferred embodiment, the secondary wooden beam 200 is clamped from both the top and bottom by two clamping components 900. The inner side of the clamping component 900 is in contact with the surface of the secondary wooden beam 200, and a flexible gasket 910 can be placed between the clamping component 900 and the secondary wooden beam 200 to prevent damage to the secondary wooden beam 200. The two ends of the two clamping components 900 are connected by bolts. At the same time, the top of the upper clamping component 900 is provided with an outwardly protruding connecting lug plate, which has a wire rope hole 920. The wire rope 820 used by the small lifting device 810 for lifting passes through the wire rope hole 920 to lift the secondary wooden beam 200.

[0089] Finally, execute S3 to install the second connecting component from the side of the secondary timber beam 200, completing the fixed connection between the secondary timber beam 200 and the T-shaped connector 400. First, drive the steel pin 610 into the side of the secondary timber beam 200. The embossed center 611 of the steel pin 610 should be in close contact with the web of the T-shaped connector 400. The steel pin 610 should be fully driven in. Then, screw the self-drilling high-strength screw 620 into the pre-set countersunk hole.

[0090] This invention cleverly utilizes the structural body (i.e., the steel structure web member 700) as a lifting point, eliminating the need for additional high-altitude scaffolding or large tower cranes, thus reducing costs and construction complexity. Simultaneously, the bottom-up lifting method and the visualized docking process ensure controllable and adjustable installation accuracy, effectively absorbing minor errors in component processing and construction, and guaranteeing installation precision.

[0091] Since the construction method provided by this invention belongs to the same inventive concept as the large-span wooden arch and secondary wooden beam connection node described above, the construction method provided by this invention has all the advantages of the large-span wooden arch and secondary wooden beam connection node described above. Therefore, the beneficial effects of the construction method provided by this invention will not be described in detail here.

[0092] In summary, the large-span wooden arch and secondary beam connection node and its construction method provided by this invention, through an innovative "embedded-plugged-composite connection" structure, solves the problems of unsightly exposed wooden structure nodes, sensitivity to errors, and insufficient torsional resistance in traditional wooden structures. It achieves a "fully concealed" effect in the connection area, allowing the building interior to present a pure and complete wood texture, greatly enhancing its aesthetic quality. In terms of structural performance, the node adopts a force transmission mechanism that combines "long bolt ties" and "pin-nail composite connections," ensuring overall rigidity while providing reliable resistance to shear and torque, significantly enhancing the node's durability and safety. Furthermore, the accompanying "bottom-up synchronous lifting" construction method cleverly utilizes existing structural web members as lifting points. Through temporary hanging steel arms and clamping fixtures, controllable and precise installation of the secondary wooden beams is achieved, effectively absorbing minor errors in component processing and construction, ensuring installation accuracy, and reducing costs and construction complexity.

[0093] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure are within the protection scope of the present invention. Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the present invention and its equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A large-span wooden arch and wooden secondary beam connecting joint, characterized in that, The utility model relates to a large-span wood arch structure, comprising: a main wood arch comprising two wood arch members arranged in parallel and having a spacing; a wood secondary beam having a U-shaped groove with an opening facing upwards formed on an end surface thereof, and an insertion slot formed in an inner groove wall of the U-shaped groove along an axis of the wood secondary beam; a steel box cushion block clamped between the two wood arch members; two T-shaped connectors symmetrically arranged on opposite sides of the main wood arch, the two wood arch members each having an installation groove formed on an outer side surface thereof, a flange plate of the T-shaped connector being embedded in the corresponding installation groove, and a web plate of the T-shaped connector extending outward perpendicularly to the flange plate and being used for being inserted into the corresponding insertion slot; a first connecting assembly penetrating the two wood arch members, the flange plates of the two T-shaped connectors and the steel box cushion block in a direction perpendicular to the outer side surfaces of the wood arch members; a second connecting assembly penetrating the web plate of the T-shaped connector from a side surface of the wood secondary beam and penetrating the web plate of the T-shaped connector in a direction perpendicular to the axis of the wood secondary beam.

2. The large-span wooden arch and wooden secondary beam connecting joint according to claim 1, characterized in that, An outer surface of the flange plate of the T-shaped connector is flush with the outer side surface of the wood arch member.

3. The connection joint of long-span wooden arch and wooden secondary beam according to claim 1, characterized in that, The first connecting assembly comprises a plurality of long bolts and a plurality of nuts, and the two wood arch members, the flange plates of the two T-shaped connectors and the steel box cushion block each have a connecting hole formed thereon, the long bolts sequentially penetrating the corresponding connecting holes of one side flange plate of the T-shaped connector, one side wood arch member, the steel box cushion block, the other side wood arch member and the other side flange plate of the T-shaped connector in a direction perpendicular to the outer side surfaces of the wood arch members, and being locked by the nuts.

4. The connection joint of long-span wooden arch and wooden secondary beam according to claim 3, characterized in that, The nuts are located in the U-shaped groove.

5. The large-span wood arch and wood secondary beam connection node according to claim 1, characterized in that, The second connecting assembly comprises a plurality of steel pins, the wood secondary beam and the web plate of the T-shaped connector each have a pin hole formed thereon, the pin hole of the wood secondary beam has a diameter greater than that of the steel pin by 1 mm, the pin hole of the web plate of the T-shaped connector has a diameter equal to that of the steel pin, the steel pin penetrates the web plate of the T-shaped connector and the pin hole of the wood secondary beam from the side surface of the wood secondary beam in a direction perpendicular to the axis of the wood secondary beam, and the length of the steel pin is equal to the width of the wood secondary beam.

6. The connection joint of a long-span wooden arch and wooden secondary beam according to claim 5, characterized in that, A middle section surface of the steel pin is provided with an embossing, an outer diameter of the middle section of the steel pin after the embossing is greater than the diameter of the steel pin, and the steel pin is in close contact with the hole wall of the web plate of the T-shaped connector after being driven in, so as to avoid loosening and falling of the steel pin.

7. The connection joint of a long-span wooden arch and wooden secondary beam according to claim 5, characterized in that, The second connecting assembly further comprises a plurality of self-drilling high-strength screws, the self-drilling high-strength screws are screwed into the web plate of the T-shaped connector from the side surface of the wood secondary beam.

8. The connection joint of a long-span wooden arch and wooden secondary beam according to claim 7, characterized in that, One side surface of the wood secondary beam is provided with a countersunk hole, and a nut of the self-drilling high-strength screw is accommodated in the countersunk hole.

9. A construction method of a large-span wooden arch and wooden secondary beam connecting joint according to any one of claims 1-8, wherein the large-span wooden arch comprises a plurality of parallel arranged main wooden arches, and the wooden secondary beam is arranged between two adjacent main wooden arches, characterized in that, The utility model relates to a large-span wood arch structure, comprising: the following steps: installing the steel box cushion block between the two wood arch members of each main wood arch and installing the T-shaped connector on opposite sides of each main wood arch by using the first connecting assembly; lifting the wood secondary beam from below the large-span wood arch, synchronously lifting two ends of the wood secondary beam, and inserting the web plates of the T-shaped connectors on both sides into the insertion slots at the two ends of the wood secondary beam until the web plates of the T-shaped connectors on both sides are aligned; A second connecting assembly is installed from the side of the wood girder, and the fixed connection of the wood girder and the T-shaped connecting piece is completed.

10. The construction method of a large-span wooden arch and wooden secondary beam connecting joint according to claim 9, characterized in that, The step of lifting the wood girder from below the large-span wood arch includes: Temporary hanging steel arms are respectively installed on the steel structure web members of the main wood arch on both sides; Small lifting devices are installed on the temporary hanging steel arms; The small lifting devices are activated to synchronously lift both ends of the wood girder.

Images