Adjustable transverse linkage system of K-shaped support and construction method of adjustable transverse linkage system

Abstract

The invention relates to an adjustable transverse connecting system of a K-shaped support and a construction method of the adjustable transverse connecting system, the transverse connecting system comprises two standard trusses (1) and a middle truss connecting piece (2), and the two standard trusses (1) are fixedly connected with the middle truss connecting piece (2) through bolts (3) and bolt holes. During site construction, the two standard trusses (1) and the middle truss connecting piece (2) can be assembled through the corresponding bolt holes and bolts (3) according to the distance of the K-shaped support (5) and then are integrally hoisted and installed, and recycling of the K-shaped support (5) and the transverse connecting system is achieved. Compared with the prior art, the adjustable transverse linkage system is more reasonable in stress, more convenient to construct and suitable for K-shaped supports with different intervals, and the design of the long bolt holes meets the adjustment requirement within the small size.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, in particular to an adjustable transverse connection system of a K-shaped bracket and a construction method thereof. Background Art

[0002] In recent years, K-type brackets have been widely used in the construction of large bridge projects in my country. For bridges with larger spans, segmented installation of K-type brackets is currently a widely used construction solution. The main function of the K-type bracket is to provide support for the upper cast-in-place concrete beam during the pouring process to ensure the stability of the overall structure before the cast-in-place concrete main beam is cured. Among the large-span bridges currently in the design and construction stage in my country, most bridges use a variable width design in some sections, which results in different spacing between K-type brackets installed in different construction sections. Taking the sea area viaduct of the third phase of the Hangzhou-Ningbo Expressway Ningbo as an example, since the total length of the coastal viaduct is 2164m, it is necessary to adopt a segmented construction method for pouring during construction. Since the middle section of the bridge is designed with a variable width, the spacing of the K-type brackets erected in each section during construction is variable.

[0003] The transverse connection system of the K-type bracket is a component that connects two K-type brackets into a whole so that they are jointly stressed. For bridges where the spacing of the K-type brackets in all construction sections remains unchanged, when the strength of the upper concrete beam reaches the required value, the K-type bracket and a series of auxiliary structures such as the cross-connection can be removed and moved to the construction location of the next section for installation, so that the K-type bracket and the auxiliary components can be recycled. At this time, the transverse connection system only needs to select standard components that meet the size. However, for many large-scale sea viaducts currently under construction where the installation spacing of the K-type brackets in each construction section is constantly changing, the selection of a certain type of transverse connection system cannot meet the spacing requirements of the K-type brackets in most sections, but if the transverse connection system is reconfigured according to each section, it will greatly increase unnecessary economic costs. In this case, a transverse connection system that can be adjusted to different spacings is designed so that it can still be recycled for K-type brackets with different spacings, which can greatly save engineering economic costs and achieve the goal of green construction, which has great engineering practical significance.

[0004] In current engineering practice, Figure 1 As shown, for K-type brackets with changing spacing in different construction sections, the method usually adopted is to select standard transverse connecting system components with specifications that can meet the maximum spacing requirements. Under the condition of meeting the section strength requirements, a screw hole is opened at a certain interval (usually 50mm) on the upper and lower cross bars. During installation, different K-beam spacings are adapted by aligning different screw holes.

[0005] However, the transverse connection system still has the following main problems: Taking the engineering K-type bracket spacing range of 1 to 2m as an example, for some K-type brackets with smaller spacing, the selection of 2m transverse connection system hole connection will make part of the transverse connecting rod exposed outside the structure, which not only increases the difficulty of hoisting and hole connection during construction, but also affects the transverse connection installation of adjacent K-type brackets. Most of the large-span bridges are cross-river and cross-sea bridges. Some bridge construction sites are located in coastal areas and are more likely to be affected by typhoons. The exposed parts are more susceptible to horizontal wind loads, resulting in large eccentric moments, affecting the stability of the structure. Since the opening position cannot be directly opposite the node of the truss, this will cause some crossbars to directly bear the load transmitted by the K-type brackets on both sides, becoming bending rods, resulting in asymmetric force, and the internal force changes and verification are more complicated. It is possible that the standard components after verification cannot meet the strength requirements. The cross section of the component crossbar needs to be expanded accordingly, increasing the design difficulty and steel consumption. In order to ensure the strength of the section, the minimum spacing of the openings should be calculated according to the strength requirements, which is generally around 50mm. This means that when installing this transverse connection system, the docking bolt holes can only be adjusted every 50mm, and it is impossible to adjust smoothly to accommodate some special dimensions in the project (i.e., if the span is not a multiple of 50mm, it cannot be adjusted).

[0006] Therefore, there is an urgent need for a transverse connection system with freely adjustable size to make the force more reasonable and the construction more convenient. Summary of the invention

[0007] The purpose of the present invention is to provide an adjustable transverse connection system of a K-type bracket and a construction method thereof. The adjustable transverse connection system has more reasonable force, more convenient construction, and is applicable to K-type brackets with different spacings.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] An adjustable transverse connection system of a K-shaped bracket comprises two standard trusses and an intermediate truss connecting piece. The two standard trusses are connected and fixed to the intermediate truss connecting piece through bolts and bolt holes.

[0010] Preferably, the two standard trusses are respectively connected to two sides of the middle truss connecting member.

[0011] Preferably, the two standard trusses and the intermediate truss connecting piece are welded by an upper cross bar, a lower cross bar, a vertical bar and an oblique bar.

[0012] Further preferably, the trusses in the present invention are welded together by an upper cross bar, a lower cross bar, two vertical bars and two diagonal bars.

[0013] Further preferably, the upper cross bar, the lower cross bar and the two vertical bars are connected to form a rectangle, and the vertical bars are vertically arranged between the upper cross bar and the lower cross bar, and are respectively connected to both ends of the upper cross bar and the lower cross bar.

[0014] Further preferably, the diagonal rods are arranged in an X-shaped structure to enhance the stability of the truss.

[0015] Preferably, a plurality of standard bolt holes with the same intervals are respectively formed on the upper cross bar and the lower cross bar of the intermediate truss connecting member.

[0016] In the present invention, the main function of the intermediate truss is to adjust the lateral size of the lateral connection system by adjusting the aligned standard bolt holes so as to adapt it to the spacing of the K-shaped brackets.

[0017] Preferably, the interval between the standard bolt holes is set to 50 mm, and the diameter of the standard bolt hole is 23 mm.

[0018] Preferably, a standard bolt hole is respectively provided on the upper cross bar and the lower cross bar on the side of the two standard trusses away from the middle truss connecting piece, and a long bolt hole is respectively provided on the upper cross bar and the lower cross bar on the side of the two standard trusses close to the middle truss connecting piece.

[0019] Preferably, the long bolt hole is a long hole consisting of a rectangle corresponding to the hole width and two semicircles.

[0020] Preferably, the length of the rectangle is 50 mm, the width is 23 mm, and the diameter of the two semicircles is 23 mm.

[0021] In the present invention, the long bolt hole allows the present invention to be adjusted in time when encountering small size deviations or non-standard sizes at the construction site, without the need for secondary processing such as hole expansion, and the assembly process is simple and convenient.

[0022] Preferably, the two standard trusses meet the half-length requirement of the minimum span size, and the sum of the connection lengths of the two standard trusses and the intermediate truss connectors meets the maximum K-type bracket spacing requirement.

[0023] Preferably, the bolts are M22 high-strength friction bolts, and the bolts are also equipped with bolt washers. The bolt washers are thickened to a thickness of 3-5 mm. The two standard trusses and the intermediate truss connectors are made of Q235b steel, ensuring the strength and stability requirements of the structure.

[0024] The present invention also provides a construction method of the adjustable transverse connection system of the K-shaped bracket, comprising the following steps:

[0025] S1: According to the size design of the whole construction section, prefabricate two standard trusses and the intermediate truss connectors and transport them to the construction site;

[0026] S2: During on-site construction, first install the K-type bracket, and then assemble the two standard trusses and the intermediate truss connector into a transverse connection system suitable for the spacing on the ground plane through the corresponding bolt holes and bolts according to the spacing of the K-type brackets in the current construction section, and then hoist and fix the transverse connection system to the K-type bracket;

[0027] S3: After the current construction section is completed, the connection between the transverse connection system and the K-shaped bracket is removed, and the transverse connection system is split into two standard trusses and an intermediate truss connector, and moved to the preset position of the next construction section;

[0028] S4: In the next construction section, install the K-type bracket. According to the spacing of the K-type bracket in this section, reassemble the two standard trusses and the intermediate truss connector through the corresponding bolt holes and bolts, and then hoist and install the entire structure to achieve the recycling of the K-type bracket and the transverse connection system.

[0029] Preferably, during disassembly, the transverse connection system can also be disassembled as a whole, and the whole can be transported to the next construction site for adjustment of the size. Therefore, the present invention is more flexible in the transportation process, and can be transported as a whole or in pieces, with lower requirements on the transport vehicle, and a suitable transportation method can be selected according to the actual project to save costs.

[0030] The design of the adjustable transverse connection system of the present invention ensures that no matter how large or small the spacing of the K-type brackets is, it can be adjusted so that the vertical bars of the standard trusses on both sides can directly bear the load of the K-beam. This solves a series of problems at the same time, such as asymmetric force, some rods exceeding the range of the K-beam, resulting in large eccentric bending moments when subjected to horizontal loads, and the excessively long transverse connection system affecting the installation of adjacent transverse connection systems. As for the continuous adjustment problem of the transverse connection system, by improving the original circular standard bolt hole into a long hole composed of a rectangle with a corresponding aperture width and two semicircles, the free adjustment of the component size within 50mm is achieved. Combining the long holes of the two standard trusses with the bolt holes set every 50mm on the middle truss connector, the full length can be freely adjusted within the adjustable length range of the truss. At the same time, the gasket is thickened to ensure the connection performance of the local component with the long hole.

[0031] Compared with the prior art, the adjustable transverse connection system of the present invention has been improved in design principle, force principle, construction method and other aspects.

[0032] In terms of design principles, in the prior art, when the transverse connection system is installed on K-type brackets with different spacings, the transverse dimensions of the transverse connection system do not change, and the connection is only made by using bolt holes at different positions. When the spacing between K-type brackets is small, the transverse connection system of the existing solution is likely to affect the installation of adjacent transverse connection systems; while the present invention directly changes the transverse dimensions of the transverse connection through the matching holes of the standard trusses on both sides and the middle truss connector, so that the dimensions of the transverse connection system itself change with the change of the spacing with the K-type bracket, rather than just using bolt holes at different positions for connection. In addition, the long bolt hole design of the standard trusses on both sides of the present invention also meets the adjustment requirements within a small size.

[0033] In terms of the force principle, the adjustable transverse connection system of the present invention has made a significant adjustment compared to the existing scheme. In the existing scheme, since the size of the transverse connection system must correspond to the maximum spacing of the K-type bracket in the project, if a symmetrical installation is adopted during installation, it may affect the installation of adjacent brackets, so it is difficult to ensure the symmetrical force of the transverse connection. At the same time, since the bolt holes are not directly facing the truss nodes, the asymmetric installation will also cause bending rods in the truss, which greatly increases the difficulty of design verification, and the force mode of the transverse connection system is not ideal. In the present invention, due to the adjustment of the transverse size of the transverse connection system, the upper load transmitted by the K-type bracket directly acts on the vertical bars of the standard trusses on both sides, and no bending cross bars are directly formed. At the same time, the force of the transverse connection system becomes symmetrical, and the design and verification work is also simplified. In addition, when the asymmetric installation method of the existing scheme faces sudden horizontal loads such as typhoons at the seaside, a large asymmetric torque will be formed inside the transverse connection system, while the installation method of the present invention can avoid the generation of asymmetric torque and improve the stability of the bracket when it is subjected to sudden horizontal loads.

[0034] In addition to the differences in principle, the construction method of the adjustable transverse connection system of the present invention has certain improvements in different construction processes compared with the existing solutions.

[0035] The transverse connection system of the existing scheme is an integrated component. After the size suitable for the entire section of the project is designed, it is prefabricated by the steel component processing plant, and then the whole piece of prefabricated components can be transported to the construction site for hoisting. The transverse connection system of the present invention is bolted together by the standard trusses on both sides and the middle truss connector to form a transverse connection system as a whole. After the steel structure processing plant completes the production of the components and transports them to the construction site in pieces, the workers bolt the three trusses according to the different K-type bracket spacings, and then hoist the assembled transverse connection system. Since the transverse connection system of the present invention is transported in pieces, and the overall size of each truss component is small, the transportation tools that can be selected are more flexible, while the transverse connection system prefabricated in one piece has higher requirements for transportation vehicles.

[0036] During the hoisting process, since the size of the transverse connection system of the existing solution remains unchanged, the rotation angle and movement direction of the K-type bracket with a smaller spacing are limited during the hoisting process, and the hoisting is difficult. The transverse connection system of the existing solution also needs to be aligned according to the size of the K-type bracket during the hoisting process, which greatly increases the working time of the hoisting. The adjustable transverse connection system of the present invention can be assembled at the construction site according to the designed size before hoisting. During hoisting, the size of the transverse connection system matches the spacing of the K-type bracket, which reduces the difficulty of hoisting. At the same time, since the size of the transverse connection system has been determined during assembly, during hoisting, it is only necessary to align the bolt holes of the K-type bracket with the standard bolt holes on the standard trusses on both sides of the transverse connection system, without the need to align the holes in a row of bolt holes, which also reduces the working time of hoisting. In addition, for small-size adjustments, the transverse connection system of the present invention can be adjusted directly through the long bolt holes without the need for on-site hole expansion, which greatly increases the applicability.

[0037] When a certain section of the K-type bracket needs to be dismantled and moved to the next construction section, the transverse connecting system needs to be dismantled first. Due to the problem of lateral dimension mismatch, the rotation angle and movement direction of the transverse connecting system of the existing solution are limited during dismantling, and the dismantling operation is difficult and time-consuming. After the transverse connecting system of the existing solution is dismantled, the K-type bracket can be directly moved after the relocation is completed. The transverse connecting system of the present invention is less difficult to dismantle because its size corresponds to the spacing between the K-type brackets. However, after dismantling, it needs to be disassembled into 3 pieces and then moved to adapt to the spacing of the next section of the K-type brackets, which adds the on-site construction steps of disassembly and assembly.

[0038] In summary, the adjustable transverse connection system of the present invention has significant advantages over the existing scheme of simple openings in terms of force performance, construction process, engineering practicality, material saving, etc. The adjustable transverse connection system of the present invention cleverly utilizes the combination of trusses to solve the core problem that the transverse dimensions of the transverse connection of the existing scheme cannot change with the change of the K-beam spacing, reduces the difficulty of hoisting and hole alignment during the construction process, cleverly resolves the problem of asymmetric force, avoids the appearance of bending cross bars, simplifies the stress state of the cross section, and therefore, compared with the existing scheme, rods with smaller cross sections can be appropriately used to achieve the purpose of saving steel. The design of the long bolt hole also solves the problem that the existing scheme can only adjust the position according to the multiple of the bolt hole spacing and cannot be adjusted smoothly, which greatly increases the engineering practicality.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] (1) The adjustable transverse connection system designed in the present invention has a more reasonable force distribution, higher structural stability, can adapt to K-type brackets with different spacings, and is more convenient to construct.

[0041] (2) The present invention constructs an adjustable transverse connection system by setting up two standard trusses and an intermediate truss connector. The upper load transmitted by the K-type bracket directly acts on the vertical bars of the two standard trusses on both sides, without directly forming a bending transverse bar. At the same time, the force of the transverse connection becomes symmetrical, and the force is more reasonable. At the same time, the installation method of the present invention can avoid the generation of asymmetric torque, thereby improving the stability of the K-type bracket when subjected to sudden horizontal loads.

[0042] (3) By setting the long bolt holes on the standard truss and the standard bolt holes on the intermediate truss connector, the transverse connection system of the present invention can be applied to K-type brackets with various different spacings, and the long bolt hole design also meets the adjustment requirements within a small size.

[0043] (4) The present invention can prefabricate standard trusses and intermediate truss connectors that meet the composite requirements according to the size design of the entire construction section, and transport them to the construction site in a piece-by-piece connection manner and assemble them on site, so that transportation is more flexible.

[0044] (5) During hoisting, the present invention only requires directly aligning the bolt holes of the K-shaped bracket with the standard bolt holes on the standard trusses on both sides of the transverse connection system for bolt connection, without the need to align the bolt holes in a row, thereby reducing the difficulty of hoisting and aligning the holes during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The schematic diagram of the installation of the adjustable transverse connection system of the existing scheme is shown, and the position where the bending cross bar appears is marked;

[0046] Figure 2 It is a schematic model of openings of two standard trusses of a transverse connection system in the present invention;

[0047] Figure 3 It is a schematic model of the opening of the intermediate truss connecting member of the transverse connection system in the present invention;

[0048] Figure 4 This is a three-dimensional effect diagram after the transverse connection system of the present invention is assembled;

[0049] Figure 5 It is a schematic elevation diagram of the transverse connection system after assembly in the present invention;

[0050] Figure 6 It is a schematic elevation diagram of the transverse connection system installed between K-shaped brackets in the present invention;

[0051] Figure 7 It is a plan view of the transverse connection system installed between K-shaped brackets in the present invention;

[0052] In the figure, 1-standard truss; 2-intermediate truss connector; 3-bolt; 4-bolt gasket; 5-K-type bracket; 6-bending cross bar. DETAILED DESCRIPTION

[0053] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0054] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the following implementation manners or examples, unless otherwise specified, functional components or structures are conventional components or conventional structures used in the art to achieve corresponding functions.

[0057] Example 1

[0058] An adjustable transverse connection system of a K-shaped bracket is composed of two standard trusses 1 and an intermediate truss connector 2 to form an integral body. The two standard trusses 1 are respectively connected and fixed to the intermediate truss connector 2 through bolts 3 and bolt holes.

[0059] Example 2

[0060] An adjustable transverse connection system of a K-type bracket, such as Figures 2 to 5 As shown, it is formed by bolting two standard trusses 1 and an intermediate truss connector 2. The two standard trusses 1 are respectively arranged on both sides of the intermediate truss connector 2. The overall length of the transverse connection system formed by the two standard trusses 1 and the intermediate truss connector 2 meets the spacing requirement of the largest K-type bracket 5, wherein the two standard trusses 1 meet the half length requirement of the minimum span size.

[0061] The two standard trusses 1 and the middle truss connector 2 are welded by upper crossbars, lower crossbars, vertical bars and diagonal bars. The upper crossbars and lower crossbars on the side of the two standard trusses 1 away from the middle truss connector 2 each have a standard bolt hole with a diameter of 23mm, and the upper crossbars and lower crossbars on the side close to the middle truss connector 2 each have a long bolt hole. The long bolt hole is a long hole consisting of a rectangle and two semicircles of corresponding hole diameter width. The length of the rectangle is 50mm, the width is 23mm, and the diameter of the two semicircles is 23mm. The upper crossbar and lower crossbar of the middle truss connector 2 have a standard bolt hole with a diameter of 23mm every 50mm. The two standard trusses 1 and the middle truss connector 2 are connected and fixed by bolt holes and bolts 3, and are equipped with bolt washers 4 to further tighten the structure.

[0062] In this embodiment, the bolts are all M22 high-strength friction bolts, and the two standard trusses 1 and the middle truss connector 2 are all made of Q235b steel.

[0063] The construction method of the adjustable transverse connection system of the K-type bracket provided in this embodiment is as follows: Figures 6-7 As shown, the following steps are included:

[0064] (1) According to the size design of the entire construction section, the steel structure prefabrication factory prefabricates two standard trusses 1 and the middle truss connector 2 in a piece-by-piece prefabrication manner. The horizontal bars, vertical bars and diagonal bars of the trusses are directly welded with angle steels. After prefabrication, they are transported to the construction site in groups;

[0065] (2) During on-site construction, the K-type bracket 5 is first installed. Then, according to the spacing of the K-type bracket 5 in the current construction section, the workers use the corresponding bolt holes and bolts 3 according to the size marked on the construction design drawing, and then use the bolt washers 4 to assemble the two standard trusses 1 and the intermediate truss connector 2 on the ground plane into a transverse connection system suitable for the spacing, and then hoist and fix the transverse connection system to the K-type bracket 5;

[0066] (3) After the current construction section is completed, the connection between the transverse connection system and the K-shaped bracket 5 is removed, and the transverse connection system is split into two standard trusses 1 and the intermediate truss connector 2, and moved to the preset position of the next construction section;

[0067] (4) In the next construction section, K-type supports 5 are installed. According to the spacing of the K-type supports 5 in this section, the two standard trusses 1 and the intermediate truss connector 2 are reassembled through the corresponding bolt holes and bolts 3, and then hoisted and installed as a whole, so as to realize the recycling of the K-type supports 5 and the transverse connection system and save engineering costs.

[0068] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. An adjustable transverse connection system for a K-shaped bracket, characterized in that: It comprises two standard trusses (1) and an intermediate truss connecting piece (2); the two standard trusses (1) are connected and fixed to the intermediate truss connecting piece (2) via bolts (3) and bolt holes.

2. The adjustable transverse connection system of a K-shaped bracket according to claim 1, characterized in that: The two standard trusses (1) and the intermediate truss connector (2) are formed by welding an upper crossbar, a lower crossbar, a vertical bar and an oblique bar.

3. The adjustable transverse connection system of a K-shaped bracket according to claim 2, characterized in that: The upper crossbar and the lower crossbar of the intermediate truss connecting member (2) are each provided with a plurality of standard bolt holes with the same intervals.

4. The adjustable transverse connection system of a K-shaped bracket according to claim 3, characterized in that: The interval between the standard bolt holes is set to 50 mm, and the diameter of the standard bolt holes is 23 mm.

5. The adjustable transverse connection system of a K-shaped bracket according to claim 2, characterized in that: A standard bolt hole is respectively provided on the upper cross bar and the lower cross bar on the side of the two standard trusses (1) away from the middle truss connecting piece (2), and a long bolt hole is respectively provided on the upper cross bar and the lower cross bar on the side of the two standard trusses close to the middle truss connecting piece (2).

6. The adjustable transverse connection system of a K-shaped bracket according to claim 5, characterized in that: The long bolt hole is a long hole composed of a rectangle and two semicircles corresponding to the hole width.

7. The adjustable transverse connection system of a K-shaped bracket according to claim 6, characterized in that: The length of the rectangle is 50 mm, the width is 23 mm, and the diameter of the two semicircles is 23 mm.

8. The adjustable transverse connection system of a K-shaped bracket according to claim 1, characterized in that: The two standard trusses (1) meet the half-length requirement of the minimum span size, and the sum of the connection lengths of the two standard trusses (1) and the intermediate truss connector (2) meets the maximum K-type bracket spacing requirement.

9. The adjustable transverse connection system of a K-shaped bracket according to claim 1, characterized in that: The bolt (3) is an M22 high-strength friction bolt. The bolt (3) is also equipped with a bolt gasket (4). The thickness of the bolt gasket (4) is 3-5 mm. The two standard trusses (1) and the intermediate truss connecting piece (2) are both made of Q235b steel.

10. A construction method for an adjustable transverse connection system of a K-type bracket as claimed in any one of claims 1 to 9, characterized in that: S1: prefabricate two standard trusses (1) and an intermediate truss connector (2) according to the size design of the entire construction section, and transport them to the construction site; S2: During on-site construction, first install the K-type bracket (5), then assemble the two standard trusses (1) and the intermediate truss connector (2) into a transverse connection system suitable for the spacing on the ground plane through the corresponding bolt holes and bolts (3) according to the spacing of the K-type brackets (5) in the current construction section, and then hoist and connect the transverse connection system to the K-type bracket (5); S3: After the current construction section is completed, the connection between the transverse connection system and the K-shaped bracket (5) is removed, and the transverse connection system is split into two standard trusses (1) and an intermediate truss connection member (2), and moved to a preset position of the next construction section; S4: In the next construction section, the K-shaped bracket (5) is installed. According to the spacing of the K-shaped bracket (5) in this section, the two standard trusses (1) and the intermediate truss connector (2) are reassembled through the corresponding bolt holes and bolts (3), and then hoisted and installed as a whole, so as to realize the recycling of the K-shaped bracket (5) and the transverse connection system.

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