Assembly type cross beam capable of being adjusted and installed in multiple directions

Abstract

The utility model relates to the technical field of bridge design and construction, in particular to an assembly type cross beam capable of being adjusted and installed in multiple directions. The assembly type cross beam capable of being adjusted and installed in multiple directions comprises a cross beam body which is a sleeve box combination and comprises N sleeve boxes which are sequentially connected in a sleeved mode, and N is larger than or equal to 2; the first flange is fixed to the end, close to the first side, of the beam body; the second flange plate is fixed to the end, close to the second side, of the beam body; wherein at least two adjacent pouring jackets in the N pouring jackets are provided with pouring jacket bolt holes in the extending direction of the cross beam body, the two adjacent pouring jackets are fixed through pouring jacket bolts penetrating through the pouring jacket bolt holes, and in the state that the pouring jacket bolts are not locked, the relative positions of the two adjacent pouring jackets in the extending direction of the cross beam body are adjustable; and when the bolts of the pouring jackets are locked, the relative positions of the two adjacent pouring jackets in the extending direction of the cross beam body are fixed. According to the utility model, the overall length of the cross beam body can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge design and construction, in particular to an assembled cross beam that can be adjusted and installed in multiple directions. Background Technique

[0002] In traditional bridge design, precast concrete bridges usually adopt concrete cross beams. According to years of application experience, the on-site construction quality of concrete cross beams is difficult to control, which easily leads to diseases such as cracking and damage during operation. In contrast, steel cross beams can be processed in the factory, with less on-site workload and higher quality assurance, meeting the trend of industrialized bridge construction. However, the contradiction between the large deformation and error in the construction of concrete main beams and the high-precision installation requirements of steel cross beams often leads to difficult installation of steel cross beams, restricting their application in concrete bridges. Content of the Utility Model

[0003] I. Technical Problems to be Solved

[0004] The utility model expects to solve at least one of the above technical problems.

[0005] II. Technical Solutions

[0006] The utility model provides an assembled cross beam that can be adjusted and installed in multiple directions, including: a cross beam body, which is a combination of casing boxes, including: N casing boxes connected in sequence by sleeving, N≥2; a first flange plate fixed to the end of the cross beam body near the first side; a second flange plate fixed to the end of the cross beam body near the second side; wherein, at least two adjacent overlapping parts of the N casing boxes are provided with casing bolt holes extending along the extension direction of the cross beam body, and two adjacent casing boxes are fixed by casing bolts passing through the casing bolt holes, where: in the state where the casing bolts are not tightened, the relative positions of two adjacent casing boxes in the extension direction of the cross beam body are adjustable; in the state where the casing bolts are tightened, the relative positions of two adjacent casing boxes in the extension direction of the cross beam body are fixed.

[0007] In some embodiments of the utility model, N = 2, and the cross beam body includes: a first casing box and a second casing box connected by sleeving, wherein the second casing box is sleeved into the first casing box; the first flange plate is arranged at the end of the first casing box away from the second casing box; the second flange plate is arranged at the end of the second casing box away from the first casing box; the overlapping part of the first casing box and the second casing box is provided with casing bolt holes.

[0008] In some embodiments of the utility model, N=3, and the beam body includes: a first set box, an intermediate set box, and a second set box which are sequentially connected; wherein the two ends of the intermediate set box are respectively inserted into the first set box and the second set box; wherein the first flange is arranged at the end of the first set box away from the second set box; the second flange is arranged at the end of the second set box away from the first set box; the overlapping part of the first set box and the intermediate set box is provided with a set box bolt hole; the overlapping part of the second set box and the intermediate set box is provided with a set box bolt hole.

[0009] In some embodiments of the present invention, the casing box is a steel box; and the assembled crossbeam is a steel crossbeam.

[0010] In some embodiments of the utility model, multiple bolt holes are arranged in the circumferential direction, and the number is greater than or equal to 4. The connection center of two symmetrical bolt holes is consistent with the center of gravity of the vertical surface of the beam body, wherein the bolt hole is: sleeve bolt hole, and the circumferential direction is the circumferential direction of the sleeve.

[0011] In some embodiments of the present invention, a bolt pad is provided at the following position: between the casing bolt and the corresponding casing.

[0012] In some embodiments of the utility model, a first bolt hole is provided on the circumference of the first flange, and the first bolt hole extends in the first direction on the vertical plane; the first flange and the first main beam on the first side are fixed by a first bolt passing through the first bolt hole, wherein, in the unlocked state of the first bolt, the relative position of the beam body and the first main beam along the first direction is adjustable; in the locked state of the first bolt, the relative position of the beam body and the first main beam along the first direction is fixed; a second bolt hole is provided on the circumference of the second flange, and the second bolt hole extends in the second direction on the vertical plane; the second flange and the second main beam on the second side are fixed by a second bolt passing through the second bolt hole; wherein: in the unlocked state of the second bolt, the relative position of the beam body and the second main beam along the second direction is adjustable; in the locked state of the second bolt, the relative position of the beam body and the second main beam along the second direction is fixed; wherein the vertical plane is perpendicular to the extension direction of the beam body; and the angle between the first direction and the second direction is between 60° and 120°.

[0013] In some embodiments of the utility model, a first bolt sleeve is embedded in the first main beam, and the first bolt passes through the first bolt hole on the first flange and is fixed to the first bolt sleeve in the first main beam; a second bolt sleeve is embedded in the second main beam, and the second bolt passes through the second bolt hole on the second flange and is fixed to the second bolt sleeve in the second main beam.

[0014] In some embodiments of the present utility model, one of the following two methods is adopted: ① Assembled crossbeams are provided on both sides of the main beam; the bolt sleeve is a bolt sleeve penetrating the main beam; the bolt passes through the bolt sleeve and is locked with the flange plates on both sides; ② Assembled crossbeams are provided on only one side of the main beam; the bolt sleeve is a bolt sleeve with a single-side opening, and threads are provided inside; the bolt is screwed into the bolt sleeve and locked; wherein, the main beam is the first main beam, the bolt sleeve is the first bolt sleeve, and the bolt is the first bolt; or, the main beam is the second main beam, the bolt sleeve is the second bolt sleeve, and the bolt is the second bolt.

[0015] In some embodiments of the present utility model, the included angle between the first direction and the second direction is 90°.

[0016] In some embodiments of the present utility model, one of the first direction and the second direction is along the horizontal direction; the other is along the vertical direction.

[0017] In some embodiments of the present utility model, the first direction is at an angle of 45° with the horizontal plane; the second direction is perpendicular to the first direction.

[0018] In some embodiments of the present utility model, the vertical section of the crossbeam body is one of the following shapes: square, rectangle, regular hexagon, circle, ellipse.

[0019] In some embodiments of the present utility model, the shapes of the first flange plate and the second flange plate correspond to the shape of the crossbeam body, and the following is satisfied between the radial extension dimension T2 of the first flange plate and the second flange plate and the radial extension dimension T1 of the crossbeam body: 0.67T1 ≤ T2 ≤ 1.5T1.

[0020] In some embodiments of the present utility model, the vertical section of the crossbeam body is: rectangle; one of the first direction and the second direction is along the horizontal direction; the other is along the vertical direction;

[0021] The radius R of the bolt satisfies:

[0022] ① To meet the shear strength requirement, the design value of the bearing capacity of each bolt is calculated by the following formula: Nv = 0.16P; where: Nv is the design value of the shear bearing capacity of the bolt; P is the design value of the pre-tension of the bolt, and the value ranges between 3R and 6R;

[0023] ② To meet the tensile strength requirement, the bearing capacity of each bolt is calculated by the following formula: Nt = 0.8P; where: Nt is the design value of the tensile force of the bolt; P is the design value of the pre-tension of the bolt, and the value ranges between 3R and 6R;

[0024] Wherein, the unit of R is mm, and the units of P, Nv, and Nt are kN;

[0025] The extension length of the bolt hole meets the following requirements:

[0026] The length L1 of the bolt hole extending in the horizontal direction satisfies: R+3mm≤L1≤2.5R;

[0027] The length L2 of the bolt hole extending in the vertical direction satisfies: R+3mm≤L2≤2.5R;

[0028] The arrangement of bolt holes meets the following requirements: the distance between the center of the bolt hole and the center of the beam body is between 6R and 16R; the distance between the center of the bolt hole and the edge of the beam body is between 3R and 8R;

[0029] Among them, the flange is the first flange or the second flange; the bolt is the first bolt or the second bolt; and the bolt hole is the first bolt hole or the second bolt hole.

[0030] In some embodiments of the present invention, the first main beam and the second main beam are concrete main beams.

[0031] In some embodiments of the utility model, multiple bolt holes are arranged in the circumferential direction, and the number is greater than or equal to 4, and the connection center of two symmetrical bolt holes is consistent with the center of gravity of the vertical surface of the beam body, wherein the bolt hole is a first bolt hole, and the circumferential direction is the circumferential direction of the first flange; and / or, the bolt hole is a second bolt hole, and the circumferential direction is the circumferential direction of the second flange.

[0032] In some embodiments of the present invention, bolt pads are arranged at the following positions: between the first bolt and the first flange; between the second bolt and the second flange.

[0033] 3. Beneficial Effects

[0034] It can be seen from the above technical solution that the present invention has at least one of the following beneficial effects compared with the prior art:

[0035] 1. In the present invention, the crossbeam body is a steel sleeve structure, comprising: N sleeves connected in sequence, N ≥ 2. Among the N sleeves, the overlapping part of at least two adjacent sleeves is provided with sleeve bolt holes along the extension direction of the crossbeam body, and the adjacent sleeves are fixed by sleeve bolts passing through the sleeve bolt holes, thereby realizing the adjustable overall length of the crossbeam body.

[0036] During the actual construction process, the length of the steel casing along the extension direction of the beam body can be flexibly adjusted, and the length of the beam body can be kept adjustable during construction; at the end of the construction, the large steel box and the small steel box are locked by the casing bolts to fix the length of the beam body, which greatly facilitates the construction.

[0037] It is particularly important to note that a slightly shorter steel beam will bring great convenience during the hoisting process, the alignment process of the first bolt hole and the first bolt sleeve, the installation of the first bolt, the alignment process of the second bolt hole and the second bolt sleeve, and the installation of the second bolt. After installing the first bolt and the second bolt, the steel beam is restored to its normal length through the sleeve bolt, compensating for the error in the main beam construction.

[0038] 2. In some embodiments of the utility model, the crossbeam body includes: a large steel box and a small steel box. The small steel box is partially inserted into the large steel box 11, and a bolt hole for the box is provided at the overlapping portion of the large steel box and the small steel box. The bolt hole for the box is designed as a slot hole along the extending direction of the crossbeam body. In the slot hole, the overlapping portion is connected or welded by a high-strength box bolt. This crossbeam body has a simple structure, is easy to transport and assemble, has a higher strength than other structures, and has a strong practical value.

[0039] 3. In some embodiments of the utility model, the crossbeam body is a two-side sleeve structure, including: a first sleeve, an intermediate sleeve, and a second sleeve that are sleeved and connected in sequence; the two ends of the intermediate sleeve are respectively sleeved into the first sleeve and the second sleeve. The overlapping part of the first sleeve and the intermediate sleeve is provided with sleeve bolt holes; the overlapping part of the second sleeve and the intermediate sleeve is provided with sleeve bolt holes. Among them, the first flange is provided at the end of the first sleeve away from the second sleeve; the second flange is provided at the end of the second sleeve away from the first sleeve. Compared with the first embodiment of the assembled crossbeam, the advantages of this embodiment are: the crossbeam body can be longer, the symmetry will be better, the load-bearing capacity will be better, and it will be more beautiful.

[0040] 4. In the utility model, in the first flange, the first bolt hole is a horizontal slot hole, and the first bolt can move left and right in the first bolt hole in the unlocked state to achieve horizontal displacement adjustment of the steel beam. The second flange is located at the outer end of the small steel box, and is connected to the first main beam through a high-strength second bolt. The second bolt hole is a vertical slot hole, and the second bolt can move left and right in the second bolt hole in the unlocked state to achieve vertical displacement adjustment of the steel beam.

[0041] In this case, even if there is a deformation difference in the construction of the main beams on both sides, the deformation difference can be compensated by the extension length of the first bolt hole and the second bolt hole in the corresponding direction, thereby improving the flexibility and efficiency of the steel beam construction, and being able to better adapt to the deformation difference in the construction of the main beams on both sides; at the same time, since the limitations caused by excessively high installation accuracy requirements are reduced, the application scope of steel beams in precast concrete structures is broadened, which is of great significance to promoting the application of steel beams in prefabricated bridges and accelerating the realization of industrialized bridge construction.

[0042] 5. In some embodiments of the utility model, the first direction is 45° to the horizontal plane; the second direction is perpendicular to the first direction. Compared with the first embodiment of the assembled beam, the advantages of this embodiment are: it is more convenient for the bolts to find a suitable position, and when locking or welding, the bolts can also provide a certain support for the steel beam, which is beneficial to construction.

[0043] 6. In the utility model, multi-directional installation and adjustment of the beam body are realized by designing slots in three different directions between the sleeves and between the two flanges and the main beam, which solves the quality control problem in the construction of traditional concrete beams and overcomes the contradiction between accuracy and error in the installation process of steel beams, providing an efficient, stable and industrialized solution for bridge construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a three-dimensional schematic diagram of the assembled crossbeam that can be adjusted in multiple directions according to an embodiment of the utility model.

[0045] Figure 2 and Figure 3 They are Figure 1 Elevation and plan views of the fabricated beam shown.

[0046] Figure 4A and Figure 4B They are Figure 1 A cross-sectional view of the connection between the first and second flanges on both sides of the assembled crossbeam and the corresponding main beam is shown.

[0047] Figure 5 The figure is a flow chart of a beam assembly method according to an embodiment of the utility model. DETAILED DESCRIPTION

[0048] The purpose of the utility model is to provide a prefabricated steel crossbeam that can be adjusted in multiple directions to improve the tolerance of construction and installation, simplify the installation process, and improve the quality of the bridge structure as a whole.

[0049] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific implementation methods and with reference to the accompanying drawings.

[0050] A first aspect of the utility model provides an assembled crossbeam that can be adjusted in multiple directions. Figure 1 It is a three-dimensional schematic diagram of the assembled crossbeam that can be adjusted in multiple directions according to an embodiment of the utility model. Figure 2 and Figure 3 They are Figure 1 The elevation and plan views of the fabricated beams are shown. Figure 1 , Figure 2 , Figure 3The assembled crossbeam that can be adjusted in multiple directions in this embodiment includes:

[0051] The crossbeam body 10 is a sleeve box combination, including: N sleeve boxes that are sequentially sleeved and connected, N≥2;

[0052] A first flange 20 is fixed to the end of the beam body close to the first side, and is provided with first bolt holes 21 in the circumferential direction thereof. The first bolt holes 21 extend along the first direction O1 on the vertical plane;

[0053] A second flange 30 is fixed to the end of the beam body close to the second side, and is provided with second bolt holes 31 in the circumferential direction. The second bolt holes 31 extend along the second direction O2 on the vertical plane;

[0054] The vertical plane is perpendicular to the extension direction O3 of the beam body; on the vertical plane, the angle between the first direction O1 and the second direction O2 is between 60° and 120°.

[0055] The various components of the assembled crossbeam that can be adjusted in multiple directions in this embodiment are described in detail below.

[0056] In an actual construction environment, the assembled cross beam is installed between the first main beam A and the second main beam B on both sides. The first main beam A and the second main beam B are concrete main beams. The assembled cross beam is a steel cross beam.

[0057] Those skilled in the art should understand that the main beams on both sides may be made of other materials, and the main beams may also be other structures that perform a fixing function. These deformation methods can also implement the present utility model and are also within the protection scope of the present utility model.

[0058] Please continue to refer to Figures 1 to 3 The cross beam body 10 is a steel casing, including: a large steel box 11 and a small steel box 12. The small steel box 12 is partially inserted into the large steel box 11. It should be noted that a casing bolt hole 13 is provided at the overlapping portion of the large steel box 11 and the small steel box 12. The casing bolt hole 13 is designed as a slot along the extending direction O3 of the cross beam body. In the slot, the overlapping portion is connected or welded by a high-strength casing bolt 14, wherein:

[0059] ① When the sleeve bolt 14 is not locked, the relative positions of the large steel box 11 and the small steel box 12 along the extension direction O3 of the crossbeam body can be adjusted;

[0060] ② When the sleeve bolts 14 are locked, the large steel box 11 and the small steel box 12 are fixed in relative positions along the extension direction O3 of the beam body.

[0061] The locking includes: threading and / or welding. The crossbeam body of this embodiment has a simple structure, is easy to transport and assemble, has a higher strength than other structures, and has great practical value.

[0062] During the actual construction process, the length of the steel casing along the extension direction of the beam body can be flexibly adjusted, and the length of the beam body can be kept adjustable during construction; at the end of the construction, the large steel box and the small steel box are locked by the casing bolts to fix the length of the beam body, which greatly facilitates the construction.

[0063] It is particularly important to note that a slightly shorter steel beam will bring great convenience during the hoisting process, the alignment process of the first bolt hole and the first bolt sleeve, the installation of the first bolt, the alignment process of the second bolt hole and the second bolt sleeve, and the installation of the second bolt. After installing the first bolt and the second bolt, the steel beam is restored to its normal length through the sleeve bolt, compensating for the error in the main beam construction.

[0064] It should be noted that, although the crossbeam body 10 of the present embodiment includes: a large steel box 11 and a small steel box 12, that is, the crossbeam body has two sleeves. However, the present invention is not limited to this. In other embodiments of the present invention, the crossbeam body may also include: N sleeves connected in sequence, N ≥ 2. Among the N sleeves, the overlapping parts of at least two adjacent sleeves are provided with sleeve bolt holes along the extension direction of the crossbeam body, and the two adjacent sleeves are fixed by sleeve bolts passing through the sleeve bolt holes, thereby realizing the adjustable length of the crossbeam body. These deformation methods can also realize the present invention and are also within the protection scope of the present invention.

[0065] In particular, in the second embodiment of the assembled crossbeam of the utility model, N=3, that is, the crossbeam body is a two-side sleeve structure, including: a first sleeve, an intermediate sleeve, and a second sleeve that are sleeved and connected in sequence; the two ends of the intermediate sleeve are respectively sleeved into the first sleeve and the second sleeve. The overlapping part of the first sleeve and the intermediate sleeve is provided with sleeve bolt holes; the overlapping part of the second sleeve and the intermediate sleeve is provided with sleeve bolt holes. Among them, the first flange is provided at the end of the first sleeve away from the second sleeve; the second flange is provided at the end of the second sleeve away from the first sleeve. Compared with the first embodiment of the assembled crossbeam, the advantages of this embodiment are: the crossbeam body can be longer, the symmetry will be better, the load-bearing capacity will be better, and it will be more beautiful.

[0066] Figure 4A and Figure 4B They are Figure 1 A cross-sectional view of the connection between the first and second flanges on both sides of the assembled crossbeam and the corresponding main beam is shown.

[0067] Please continue to refer to Figures 1 to 3 ,Figure 4A , Figure 4B The first flange 20 is located at the outer end of the large steel box and is connected to the first main beam through a high-strength first bolt 23. The second flange 30 is located at the outer end of the small steel box and is connected to the second main beam through a high-strength second bolt 33.

[0068] In this embodiment, the vertical cross section of the cross beam is a rectangle, and the corresponding longitudinal cross sections of the first flange 11 and the second flange 12 are also rectangles. However, the present invention is not limited to this. In other embodiments of the present invention, the vertical cross section of the cross beam can also be a regular hexagon, a circle, an ellipse, etc., and the first flange and the second flange can be designed into corresponding shapes. Preferably, considering the structural strength and convenience of the flange, the radial extension dimension T2 of the first flange and the second flange satisfies the radial extension dimension T1 of the cross beam body: 0.67T1≤T2≤1.5T1.

[0069] Please continue to refer to Figures 1 to 3 , Figure 4A In the first flange 20, the first bolt hole 21 is a horizontal slot. In the unlocked state, the first bolt 23 can move left and right in the first bolt hole 21 to achieve horizontal displacement adjustment of the steel beam. Please continue to refer to Figures 1 to 3 , Figure 4B The second flange 30 is located at the outer end of the small steel box and is connected to the first main beam through a high-strength second bolt. The second bolt hole 31 is a vertical slot. In the unlocked state, the second bolt 33 can move left and right in the second bolt hole 31 to achieve vertical displacement adjustment of the steel beam. Wherein:

[0070] ① The first flange 21 is fixed to the first main beam A by the first bolt 23 passing through the first bolt hole.

[0071] Wherein, when the first bolt 23 is not locked, the relative position of the beam body 10 and the first main beam A along the first direction is adjustable; when the first bolt 23 is locked, the relative position of the beam body 10 and the first main beam A along the first direction is fixed;

[0072] ② The second flange is fixed to the second main beam by the second bolt passing through the second bolt hole.

[0073] Among them, when the second bolt 33 is unlocked, the relative position of the beam body 10 and the second main beam B along the second direction is adjustable; when the second bolt 33 is locked, the relative position of the beam body 10 and the second main beam B along the second direction is fixed.

[0074] In this embodiment, even if there is a deformation difference in the construction of the main beams on both sides, the deformation difference can be compensated by the extension length of the first bolt hole 21 and the second bolt hole 31 in the corresponding direction, thereby improving the flexibility and efficiency of the steel beam construction, and can better adapt to the deformation difference in the construction of the main beams on both sides; at the same time, since the limitations caused by excessively high installation accuracy requirements are reduced, the application scope of steel beams in precast concrete structures is broadened, which is of great significance to promoting the application of steel beams in prefabricated bridges and accelerating the realization of industrialized bridge construction.

[0075] Please continue to refer to Figures 1 to 3 In this embodiment, the angle between the first direction O1 and the second direction O2 is 90°, that is, the first bolt hole 21 is a horizontal slot, and the second bolt hole 31 is a vertical slot. However, the present invention is not limited to this. In other embodiments of the present invention, the angle between the first direction O1 and the second direction O2 can be between 60° and 120°. These deformation modes can also realize the present invention and are also within the protection scope of the present invention.

[0076] In particular, in the third embodiment of the assembled beam of the utility model, the first direction is 45 degrees to the horizontal plane; the second direction is perpendicular to the first direction. Compared with the first embodiment of the assembled beam, the advantages of this embodiment are: it is more convenient for the bolts to find a suitable position, and when locking or welding, the bolts can also provide a certain support for the steel beam, which is beneficial to construction.

[0077] For the bolt holes and corresponding bolts on the first flange, the second flange, and the crossbeam sleeve, the following aspects also need to be explained:

[0078] (1) Number and location of bolt holes / bolts

[0079] like Figures 1 to 3 As shown, in the overlapping part of the large steel box and the small steel box, 6 bolt holes / bolts are set on the two horizontal planes, and 4 bolt holes / bolts are set on the two longitudinal planes. Figure 4A and Figure 4B There are 8 bolt holes / bolts in the first and second flanges.

[0080] Those skilled in the art should understand that the above are only preferred embodiments of the present invention. In other embodiments of the present invention, the number of bolt holes / bolts can be reasonably set according to the results of structural calculations.

[0081] In a preferred embodiment of the present invention, the bolt holes are evenly distributed in the circumferential direction, and the number of the bolt holes is greater than or equal to 4.

[0082] (2) Multiple bolt holes / bolt locations

[0083] In a preferred embodiment of the utility model, the connection center of the two symmetrical bolt holes is consistent with the center of gravity of the vertical surface of the beam body, and the distance between the bolt hole and the center of the beam body is between 6R and 16R; the distance between the center of the bolt hole and the edge of the beam body is between 3R and 8R.

[0084] (3) Radius of the bolt

[0085] For each bolt, the shear force and tensile stress it bears can be obtained through structural calculation. After obtaining the shear force and tensile stress, the radius R of the bolt is calculated in combination with the strength parameters of the bolt material. Specifically, the radius R of the bolt satisfies:

[0086] ① To meet the shear strength requirements, the design value of the bearing capacity of each bolt is calculated as follows: Nv = 0.16P; where: Nv is the design value of the shear bearing capacity of the bolt; P is the design value of the pre-tension of the bolt, which is between 3R and 6R;

[0087] ② To meet the tensile strength requirements, the bearing capacity of each bolt is calculated according to the following formula: Nt=0.8P; where: Nt is the design value of the bolt's tensile force; P is the design value of the bolt's pre-tension force, which ranges from 3R to 6R.

[0088] Among them, the unit of R is mm, and the unit of P, Nv, and Nt is kN.

[0089] (4) Extension length of bolt hole

[0090] The larger the bolt hole extension length is, the larger the main beam construction error can be compensated, but it also means a reduction in the flange structure strength. Therefore, it is necessary to consider the specific construction conditions and the size of the steel beam for setting. Based on many years of construction experience, in this utility model, the bolt hole extension length meets the following requirements:

[0091] ① The length L1 of the first bolt hole 21 extending in the horizontal direction satisfies: R+3mm≤L1≤2.5R;

[0092] ② The length L2 of the second bolt hole 31 extending in the vertical direction satisfies: R+3mm≤L2≤2.5R;

[0093] (5) Anchoring of bolts.

[0094] In this embodiment, a bolt washer is provided between the bolt and the flange to improve the stability and bearing capacity of the connection. Specifically, a sleeve bolt washer is provided between the sleeve bolt and the large steel box; a first bolt washer 24 is provided between the first bolt and the first flange, and a second bolt washer 34 is provided between the second bolt and the second flange.

[0095] Furthermore, in order to improve the anchoring force of the steel crossbeam on the concrete main girder, bolt sleeves are embedded in the first / second main girders to enhance the integrity and stability of the structure. Specifically:

[0096] ① The first bolt sleeve 22 is embedded in the first main girder A

[0097] Among them, the first bolt 23 passes through the first bolt hole 21 on the first flange and is fixed into the first bolt sleeve 22 in the first main girder;

[0098] ② The second bolt sleeve 32 is embedded in the second main girder B

[0099] Among them, the second bolt 33 passes through the second bolt hole 31 on the second flange and is fixed into the second bolt sleeve 32 in the second main girder.

[0100] Due to the different positions of the first / second main girders, the setting methods of the bolt sleeves will also be different. Specifically, one of the following two methods is adopted:

[0101] ① As shown in the first main girder A in Figure 3 , prefabricated crossbeams are arranged on both sides of the first main girder; the first bolt sleeve 22 is a bolt sleeve penetrating the first main girder A; the first bolt 23 passes through the first bolt sleeve and is locked with the second flange 30' on the other side, and the second flange 30' is welded on another crossbeam body 10';

[0102] ② As shown in the second main girder B in Figure 3 , prefabricated crossbeams are arranged on only one side of the second main girder; the second bolt sleeve 32 is a bolt sleeve with a unilateral opening, and threads are provided inside; the second bolt 33 is screwed into the bolt sleeve and locked.

[0103] In this embodiment, the multi-directional installation adjustment of the crossbeam body is realized through the design of the slot holes in three different directions between the casing boxes and between the two flanges and the main girder, solving the quality control problems in the construction of traditional concrete crossbeams and overcoming the contradiction between the accuracy and error in the installation process of the steel crossbeam, providing an efficient, stable and industrialized solution for bridge construction.

[0104] Based on the above prefabricated crossbeam, the second aspect of the present invention provides a crossbeam assembly method during the construction stage. Figure 5 It is the flow chart of the crossbeam assembly method of the embodiment of the present invention. Please refer to Figures 1 to 3 , Figure 4A , Figure 4B , Figure 5 As shown, the crossbeam assembly method of this embodiment includes:

[0105] Step A, prepare N casing boxes that form the crossbeam body in the prefabricated crossbeam as in the above embodiment; among them, casing box bolt holes extending along the extension direction of the crossbeam body are provided at the preset overlapping parts of two adjacent casing boxes; a first flange is welded on the outer side of the first-side casing box in the casing box combination; a second flange is welded on the outer side of the second-side casing box.

[0106] Step B, pre-embed a first bolt sleeve and a second bolt sleeve at the preset flange connection positions of the first main beam and the second main beam on both sides respectively.

[0107] Step C, sequentially sleeve and pre-connect the N casing boxes into the crossbeam body, and among them, keep the casing box bolts passing through the casing box bolt holes in a semi-locked state.

[0108] It should be specifically noted that the "semi-locked state" here means that the relative positions of the large casing box and the small casing box are basically fixed, but not completely locked, and they can be disassembled with little effort to adjust the positions of the casing box bolts in the casing box bolt holes.

[0109] Step D, adjust the position of the crossbeam body to meet the following conditions: the first bolt sleeve on the first main beam can align with a specific position of the first bolt hole extending along the first direction on the first flange; the second bolt sleeve on the second main beam can align with a specific position of the second bolt hole extending along the second direction on the second flange.

[0110] Step E, install the first bolt and lock it to fix the first flange to the first main beam, thereby fixing the relative position of the crossbeam body and the first main beam along the first direction; install the second bolt and lock it to fix the second flange to the second main beam, thereby fixing the relative position of the crossbeam body and the second main beam along the second direction.

[0111] Step F, completely lock the casing box bolts to fix the relative positions of adjacent casing boxes in the crossbeam extension direction in the casing box combination, thereby fixing the length of the crossbeam body along its own extension direction.

[0112] Step G, weld and fix the casing box bolts to the corresponding casing boxes, weld and fix the first bolts to the first flanges, and weld and fix the second bolts to the second flanges.

[0113] The following details each step of the crossbeam assembly method of this embodiment.

[0114] For Step A, it is divided into the following two sub-steps:

[0115] Sub-step A1, manufacture steel casing boxes

[0116] In this embodiment, the N casing boxes are: large casing box 11 and small casing box 12.

[0117] In actual engineering, high-strength steel is used to manufacture the large steel box 11 and the small steel box 12 separately in the factory. Slot holes are provided in the predetermined connection area of the large steel box 11 along the crossbeam direction; round holes are provided in the predetermined connection area of the small steel box 12 for subsequent high-strength bolt connections.

[0118] Sub-step A2, manufacturing the flange

[0119] In actual engineering, the first flange 20 and the second flange 30 are manufactured and welded to the corresponding steel boxes as a whole. The first flange 20 is welded and fixed to the outer end of the small steel box 12; the second flange 30 is welded and fixed to the outer end of the large steel box 11. Among them, slot holes are provided in the first flange 20 along the horizontal direction to accommodate the adjustment of the steel crossbeam in the horizontal direction. Vertical slot holes are provided in the second flange 30 to accommodate the adjustment of the steel crossbeam in the vertical direction. After the steel crossbeam is manufactured, it is transported to the construction site and positioned at the predetermined position between the two concrete main girders - the first main girder A and the second main girder B.

[0120] In step B, the concrete main girders A and B are precast in the factory, and bolt sleeves are embedded at the pre-connection positions of the steel crossbeam. The first bolt sleeve 22 is embedded in the side girder, and the second bolt sleeve 32 is embedded in the middle girder to meet the connection requirements of the steel crossbeam. The first bolt sleeve is a bolt sleeve with a single-sided opening, and the second bolt sleeve is a bolt sleeve that penetrates the main girder.

[0121] Steps C to G are the installation process of the steel crossbeam. During the installation process, using the reserved slot holes, according to the actual measurement results of the concrete main girders, the positions of the high-strength bolts are adjusted to accommodate the deformation and error of the main girders. Bolt washers are placed between the high-strength bolts and the slot holes, and then the high-strength bolts are gradually tightened to ensure the firm connection between the steel crossbeam and the concrete main girders, while achieving the required multi-directional adjustment.

[0122] It should be particularly noted that during the installation process of the steel crossbeam, first, the sleeve bolts are semi-locked. At this time, during the hoisting process, the installation process of aligning the first bolt hole and the first bolt sleeve, the installation of the first bolt, the alignment of the second bolt hole and the second bolt sleeve, and the installation of the second bolt, the slightly shorter steel crossbeam will bring great convenience and improve safety. After installing the first bolt and the second bolt, the steel crossbeam is restored to its normal length through the sleeve bolts, compensating for the errors in the construction of the main girders.

[0123] So far, the description of each embodiment of the present utility model is completed. Based on the above description, those skilled in the art should have a clear understanding of the present utility model.

[0124] It should be noted that, unless explicitly stated to the contrary, the numerical parameters in the description and claims of the present utility model may be approximate values and can be changed according to the content of the present utility model. Specifically, all the numbers recorded in the description and claims representing the content of components, reaction conditions, etc. should be understood as being modified by the term "about" in all cases, and the meaning expressed is that it includes a change of ±10% of a specific quantity in some embodiments.

[0125] The ordinal numbers used in the description and claims, such as "first", "second", "third", "main", "sub", as well as Arabic numerals, letters, etc., are used to modify the corresponding elements (or steps). Their original intention is only to clearly distinguish one element (or step) with a certain name from another element (or step) with the same name, and does not mean that the element (or step) has any ordinal number, nor does it represent the order of one element (or step) and another element (or step).

[0126] It also should be noted that the directional terms mentioned in the embodiments, such as "center", "lateral", "longitudinal", "top", "bottom", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship only based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. And throughout the drawings, the same elements are represented by the same or similar reference numerals. And the shapes and sizes of the components in the drawings do not reflect the actual size and proportion, but only illustrate the content of the embodiments of the present utility model.

[0127] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "coupled" 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 directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0128] Those skilled in the art should understand that in the claims and description of the present utility model, the word "comprising" does not exclude the existence of elements (or steps) not listed in the claims. The word "a" or "an" before an element (or step) does not exclude the existence of multiple such elements (or steps).

[0129] For some implementations, if they are not the key content of the present utility model and are well-known to those of ordinary skill in the art, due to space limitations, they are not described in detail in the specification drawings or the text. In this case, reference may be made to the relevant prior art for understanding.

[0130] Moreover, the purpose of providing the above embodiments is only to make the present utility model meet legal requirements, and the present utility model can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein.

[0131] Similarly, it should be understood that, in order to streamline the present utility model, in the above description of the exemplary embodiments of the present utility model, the various features of the present utility model are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present utility model should not be construed as reflecting the intention that the claimed utility model requires more features than those expressly recited in each claim. Rather, as reflected in the claims, each aspect of the utility model lies in less than all the features of the preceding single embodiment. Also, the embodiments may be combined with each other or with other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments. Therefore, the claims following the specific implementation are hereby expressly incorporated into the specific implementation, where each claim itself serves as a separate embodiment of the present utility model.

[0132] In the above specific embodiments, the purpose, technical means, and beneficial effects of the present utility model are described in detail. It should be understood that the purpose of the detailed description is for those skilled in the art to understand the present utility model more clearly and is not used to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An assembled beam that can be adjusted in multiple directions, characterized in that: include: The crossbeam body is a set of boxes, including: N sets of boxes connected in sequence, N ≥ 2; A first flange, fixed to an end of the beam body close to the first side; A second flange is fixed to an end of the beam body close to the second side; Among them, the overlapping parts of at least two adjacent sleeves among the N sleeves are provided with sleeve bolt holes along the extension direction of the beam body, and the two adjacent sleeves are fixed by sleeve bolts passing through the sleeve bolt holes, wherein: when the sleeve bolts are not locked, the relative positions of the two adjacent sleeves along the extension direction of the beam body are adjustable; when the sleeve bolts are locked, the relative positions of the two adjacent sleeves along the extension direction of the beam body are fixed.

2. The assembled crossbeam according to claim 1, characterized in that: N=2, the crossbeam body comprises: a first set box and a second set box which are connected in a sleeved manner, wherein the second set box is sleeved into the first set box; a first flange is arranged at an end of the first set box away from the second set box; a second flange is arranged at an end of the second set box away from the first set box; and a sleeve bolt hole is arranged at the overlapping portion of the first set box and the second set box; Or, N=3, the beam body includes: a first casing, an intermediate casing, and a second casing which are sequentially connected in a sleeve; wherein the two ends of the intermediate casing are respectively inserted into the first casing and the second casing; wherein the first flange is arranged at the end of the first casing away from the second casing; the second flange is arranged at the end of the second casing away from the first casing; casing bolt holes are arranged at the overlapping part of the first casing and the intermediate casing; casing bolt holes are arranged at the overlapping part of the second casing and the intermediate casing.

3. The assembled crossbeam according to claim 1, characterized in that: The casing is a steel box; the assembled crossbeam is a steel crossbeam; and / or, a plurality of bolt holes are arranged in a circumferential direction, and the number is greater than or equal to 4, and the connection center of two symmetrical bolt holes is consistent with the center of gravity of the vertical surface of the crossbeam body, wherein the bolt holes are: sleeve bolt holes, and the circumferential direction is the circumferential direction of the sleeve; And / or, a bolt pad is provided at the following position: between the casing bolt and the corresponding casing.

4. The assembled crossbeam according to claim 1, characterized in that: A first bolt hole is arranged on the circumference of the first flange, and the first bolt hole extends along the first direction on the vertical plane; the first flange is fixed to the first main beam on the first side by a first bolt passing through the first bolt hole, wherein, when the first bolt is not locked, the relative position of the cross beam body and the first main beam along the first direction is adjustable; when the first bolt is locked, the relative position of the cross beam body and the first main beam along the first direction is fixed; A second bolt hole is arranged on the circumference of the second flange, and the second bolt hole extends along the second direction on the vertical plane; the second flange is fixed to the second main beam on the second side by a second bolt passing through the second bolt hole; wherein: when the second bolt is not locked, the relative position of the cross beam body and the second main beam along the second direction is adjustable; when the second bolt is locked, the relative position of the cross beam body and the second main beam along the second direction is fixed; Wherein, the vertical surface is perpendicular to the extension direction of the beam body; and the angle between the first direction and the second direction is between 60° and 120°.

5. The assembled crossbeam according to claim 4, characterized in that: A first bolt sleeve is embedded in the first main beam, and the first bolt passes through a first bolt hole on the first flange and is fixed to the first bolt sleeve in the first main beam; A second bolt sleeve is embedded in the second main beam, and the second bolt passes through the second bolt hole on the second flange and is fixed to the second bolt sleeve in the second main beam.

6. The assembled crossbeam according to claim 5, characterized in that: Use one of the following two methods: ① Both sides of the main beam are provided with assembled cross beams; the bolt sleeve is a bolt sleeve that penetrates the main beam; the bolt passes through the bolt sleeve and is locked with the flanges on both sides; ②Only one side of the main beam is provided with an assembled crossbeam; the bolt sleeve is a bolt sleeve with a single-side opening and a thread is provided inside; the bolt is screwed into the bolt sleeve and locked; Among them, the main beam is the first main beam, the bolt sleeve is the first bolt sleeve, and the bolt is the first bolt; or, the main beam is the second main beam, the bolt sleeve is the second bolt sleeve, and the bolt is the second bolt.

7. The assembled crossbeam according to claim 4, characterized in that: The angle between the first direction and the second direction is 90°; Or, one of the first direction and the second direction is along the horizontal direction; the other is along the vertical direction; Alternatively, the first direction is at an angle of 45° to the horizontal plane; and the second direction is perpendicular to the first direction.

8. The assembled crossbeam according to claim 4, characterized in that: The vertical cross-section of the beam body is one of the following shapes: square, rectangle, regular hexagon, circle, ellipse; And / or, the shapes of the first flange and the second flange correspond to the shape of the beam body, and the radial extension dimension T2 of the first flange and the second flange and the radial extension dimension T1 of the beam body satisfy: 0.67T1≤T2≤1.5T1.

9. The assembled crossbeam according to claim 4, characterized in that: The vertical section of the crossbeam body is: rectangular; One of the first direction and the second direction is in a horizontal direction; the other is in a vertical direction; The radius R of the bolt satisfies: ① To meet the shear strength requirements, the design value of the bearing capacity of each bolt is calculated as follows: Nv = 0.16P; where: Nv is the design value of the shear bearing capacity of the bolt; P is the design value of the pre-tension of the bolt, which is between 3R and 6R; ② To meet the tensile strength requirements, the bearing capacity of each bolt is calculated as follows: Nt = 0.8P; where: Nt is the design value of the bolt's tensile force; P is the design value of the bolt's pre-tension force, which is between 3R and 6R; Among them, the unit of R is mm, and the unit of P, Nv, and Nt is kN; The extension length of the bolt hole meets the following requirements: The length L1 of the bolt hole extending in the horizontal direction satisfies: R+3mm≤L1≤2.5R; The length L2 of the bolt hole extending in the vertical direction satisfies: R+3mm≤L2≤2.5R; the arrangement of the bolt holes satisfies: the distance between the center of the bolt hole and the center of the beam body is between 6R and 16R; the distance between the center of the bolt hole and the edge of the beam body is between 3R and 8R; Wherein, the flange is the first flange or the second flange; the bolt is the first bolt or the second bolt; and the bolt hole is the first bolt hole or the second bolt hole.

10. The assembled crossbeam according to claim 4, characterized in that: The first main beam and the second main beam are concrete main beams; and / or, a plurality of bolt holes are arranged in a circumferential direction, and the number of the bolt holes is greater than or equal to 4, and the connection center of two symmetrical bolt holes is consistent with the center of gravity of the vertical surface of the crossbeam body, wherein the bolt hole is a first bolt hole, and the circumferential direction is the circumferential direction of the first flange; and / or, the bolt hole is a second bolt hole, and the circumferential direction is the circumferential direction of the second flange; And / or, a bolt pad is arranged at the following positions: between the first bolt and the first flange; between the second bolt and the second flange.

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