Load transfer device and method for bridge system

Abstract

The invention relates to the technical field of T-beam reinforcement, and discloses a load transfer device and method for a bridge system.The load transfer device comprises a transfer mechanism and a supporting mechanism, the supporting mechanism is arranged above a cover beam, and the transfer mechanism is fixedly arranged below a bridge deck; the load transfer method comprises the following steps: step 1, cushion stone pouring; secondly, a jacking mechanism is installed; thirdly, a slope self-adjusting mechanism is installed; fourthly, a transfer mechanism is installed; 5, jacking the transfer mechanism; sixthly, the leveling bolts are fastened; and seventhly, concrete is poured into a cavity between the jacking steel plate and the padstone. By the adoption of the technical scheme, the load sharing efficiency of the bridge deck slab is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of T-beam reinforcement, and in particular to a load transfer device and method for a bridge system. Background Art

[0002] At present, as the service life of the bridge (i.e. the original beam, such as a T-beam) increases, the bearing capacity of the original beam weakens, and a new beam is usually added. The new beam can bear part of the bridge deck vehicle load borne by the original beam, thereby reducing the bridge deck vehicle load actually borne by the original beam.

[0003] In the prior art, the invention patent "Bridge reinforcement device based on load transfer" with application publication number CN110983993A discloses a newly added beam body and a support system arranged under the newly added beam body, and the newly added beam body can bear part of the bridge deck vehicle load. Among them, the newly added beam body includes the following components from top to bottom: an upper flange plate, a web plate, and a lower flange plate. The specific process of the above components bearing the load is as follows: an upper flange plate, a web plate, and a lower flange plate are arranged from top to bottom between adjacent original beam bodies, and a support system is arranged under the newly added beam body, thereby reducing the bridge deck vehicle load actually borne by the original beam body. Among them, the original beam body can be a T-beam, and the upper flange plate, web plate, and lower flange plate of the newly added beam body form an I-beam (hereinafter referred to as an I-beam).

[0004] However, although part of the bridge deck load can be shared by the original beam (e.g., T-beam) and the newly added beam (e.g., I-beam), the bridge deck load cannot be shared to a large extent (i.e., cannot be shared effectively) to reduce the burden on the bridge deck. In other words, the efficiency of the newly added beam in sharing the bridge deck load is low.

[0005] Therefore, there is an urgent need for a load transfer device for a bridge system that can effectively share the load of the bridge deck, that is, greatly improve the efficiency of sharing the load of the bridge deck. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a load transfer device and method for a bridge system. First, the first transfer component of the transfer mechanism can realize the initial transfer of the bridge deck load. Second, the second transfer component of the transfer mechanism can share the bridge deck load borne by the first transfer component, that is, to realize the secondary transfer of the bridge deck load. It is precisely because the second transfer component is set on the basis of the first transfer component that the effective transfer of the bridge deck load is realized, and the transfer efficiency of the bridge deck load is greatly improved.

[0007] The present invention provides a load transfer device for a bridge system, characterized in that it comprises: a transfer mechanism disposed between a plurality of T-beams for transferring the load of the bridge deck, a support mechanism fixedly disposed below the transfer mechanism for supporting the transfer mechanism, the support mechanism fixedly disposed above the pad stone, and the transfer mechanism fixedly disposed below the bridge deck;

[0008] The transfer mechanism includes a plurality of transfer assemblies, each of which includes a first transfer assembly and a pair of second transfer assemblies symmetrically arranged on both sides of the first transfer assembly;

[0009] The first transfer assembly includes an upper chord fixedly disposed below the bridge deck, a lower chord fixedly disposed above the support mechanism, and a vertical rod fixedly disposed between the upper chord and the lower chord;

[0010] The second transfer assembly includes an upper node plate fixedly arranged on one side of the upper chord, a lower node plate fixedly arranged on one side of the lower chord, and a web member fixedly arranged between the upper node plate and the lower node plate;

[0011] The vertical rod is fixedly connected to the upper chord rod, and the vertical rod is fixedly connected to the lower node plate;

[0012] The bridge deck and the upper chord are fixedly connected by shear nails, the upper chord and the upper node plate are fixedly connected by a first connecting assembly, and the upper node plate and the web are connected by fixing screws;

[0013] The web member and the lower node plate are connected by the fixing screws, and the lower node plate and the lower chord are connected by the fixing screws;

[0014] The included angle range between the center line of the web member and the center line of the lower chord member includes [20°, 80°], wherein 20° is the lower limit of the included angle and 80° is the upper limit of the included angle;

[0015] The support mechanism comprises a self-slope-adjusting mechanism arranged below the support mechanism, and a lifting mechanism fixedly arranged below the self-slope-adjusting mechanism for lifting the self-slope-adjusting mechanism;

[0016] The self-slope adjustment mechanism comprises a slope adjustment steel plate, a support pressure steel plate, a support, a slide plate, and a support slide groove which are arranged in sequence from top to bottom, the bottom of the slope adjustment steel plate is provided with a spherical convex portion, the top of the support pressure steel plate is provided with a spherical groove adapted to the spherical convex portion, the support is arranged at the bottom of the support pressure steel plate, the slide plate is arranged at the bottom of the support, and the slide plate is located in the support slide groove adapted to the slide plate;

[0017] The jacking mechanism includes a jacking steel plate fixedly arranged below the support slide groove, leveling bolts passing through the four corners of the jacking steel plate, a limit nut arranged below the leveling bolts for limiting the height of the jacking steel plate, and a jack arranged in the cavity between the pad stone and the jacking steel plate for lifting the jacking steel plate upward, and the leveling bolts are installed in the pad stone.

[0018] The above-mentioned load transfer device for a bridge system is characterized in that: the first connecting component includes an upper steel plate arranged below the upper chord, a pair of L-shaped steel plates vertically symmetrically arranged on both sides of the upper steel plate and fixedly connected to the upper steel plate through the shear nails, the L-shaped steel plate and the upper node plate are fixedly connected by a first screw, the upper node plate and the web are connected by a second screw, and the upper node plate and the upper steel plate are fixedly connected by a third screw.

[0019] The above-mentioned load transfer device for a bridge system is characterized in that the vertical rod and the upper chord rod are connected by the second screw, and the vertical rod and the lower node plate are connected by the second screw.

[0020] The above-mentioned load transfer device for a bridge system is characterized in that the first screw includes a limit screw, the second screw includes a fixing screw, and the third screw includes a thrust screw.

[0021] The present invention also provides a method for load transfer using a load transfer device for a bridge system, which is characterized by comprising:

[0022] Step 1: Casting the cushion stone: Cast the cushion stone on the cap beam, and embed four leveling bolts in the cushion stone;

[0023] Step 2: Install the lifting mechanism, insert a limit nut into each of the four leveling bolts, insert a lifting steel plate above the limit nut, and adjust the limit nut to make the lifting steel plate level;

[0024] Step 3: Install the self-slope adjustment mechanism, weld the support chute on the upper surface of the jacking steel plate, place a slide plate in the support chute, place a support on the upper surface of the slide plate, and place a support pressure steel plate on the support, so that the spherical convex part of the jacking steel plate is in the spherical groove of the support pressure steel plate, and the center of gravity of the jacking steel plate, the support chute, the support, the support pressure steel plate, and the slope adjustment steel plate coincide;

[0025] Step 4: Install the transfer mechanism, first install the first transfer assembly and the lower node plate, set an upper chord on the lower surface of the bridge deck, set a lower chord on the upper surface of the slope adjustment steel plate, set a vertical rod below the upper chord, set the lower node plate below the vertical rod, and set a lower chord on one side of the lower node plate, so that the upper chord, the vertical rod, and the lower chord form an I-shape;

[0026] Then install the second transfer assembly, and symmetrically install two pairs of web members on both sides of the vertical rod, wherein the upper ends of the web members are connected to the upper node plate, the upper node plate is connected to the upper chord, the lower ends of the web members are connected to the lower node plate, and the lower node plate is connected to the lower chord;

[0027] Step 5: lifting the transfer mechanism. A jack is placed between the lifting steel plate and the cushion stone. The jack lifts the lifting steel plate upward. The lifting steel plate lifts the self-slope adjustment mechanism upward. The self-slope adjustment mechanism lifts the lower chord upward. Since the lower chord is connected to the vertical rod through the lower node plate, and the lower chord is connected to the web rod through the lower node plate, the vertical rod can lift the upper chord upward. The web rod can lift the upper chord upward. The upper chord lifts the bridge deck upward, thereby transferring the bridge deck load.

[0028] Step 6, tighten the leveling bolts. When the lifting force reaches the preset requirement, tighten the leveling bolts to ensure the position of the transfer mechanism and the size of the lifting force;

[0029] Step 7: Concrete is poured into the cavity between the jacking steel plate and the pad stone so that the upper surface of the concrete is flush with the lower panel of the jacking steel plate, thereby ensuring the stability of the jacking steel plate and further ensuring the magnitude of the jacking force.

[0030] The beneficial effect reasoning analysis is as follows:

[0031] In the prior art, although part of the bridge deck load can be borne by the original beam and the newly added beam, it still cannot share the bridge deck load to a large extent and reduce the burden on the bridge deck. That is, the efficiency of the newly added beam in sharing the bridge deck load is low.

[0032] In the technical solution provided by the present invention, firstly, a first transfer assembly is arranged below the bridge deck. Specifically, an upper chord, a vertical rod, and a lower chord can be arranged in sequence below the bridge deck. Secondly, a pair of second transfer assemblies are symmetrically arranged on both sides of the first transfer assembly. Specifically, an upper node plate can be arranged on one side of the upper chord, and then a web member and a lower node plate are arranged in sequence below the upper node plate. Among them, the lower node plate is arranged on one side of the lower chord. It should be noted that the upper node plate is on one side of the upper chord, and the lower node plate is on one side of the lower chord, and the above two sides are on the same side. Thirdly, a supporting mechanism is arranged below the lower chord. Specifically, a self-slope adjusting mechanism and a jacking mechanism can be arranged in sequence below the lower chord. Fourthly, a cushion stone and a cap beam are arranged in sequence below the jacking mechanism.

[0033] It is precisely because a pair of second transfer assemblies are symmetrically arranged on one side of the first transfer assembly that, firstly, the T-beam and the first transfer assembly can bear the bridge deck load. Secondly, the second transfer assembly can share the bridge deck load borne by the first transfer assembly, thereby reducing the burden on the bridge deck. In other words, the first transfer assembly and the second transfer assembly can jointly bear the bridge deck load.

[0034] Therefore, the technical solution of the present invention is adopted to greatly improve the load sharing efficiency of the bridge deck. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a load transfer device for a bridge system provided by the present invention in the transverse direction of the bridge;

[0036] Figure 2 for Figure 1 A schematic diagram of the rightmost transfer mechanism and the supporting mechanism arranged below in the longitudinal direction of the bridge;

[0037] Figure 3 for Figure 2 Enlarged structural diagram of the middle upper chord, upper node plate, and web;

[0038] Figure 4 for Figure 2 Enlarged structural diagram of the middle and lower chord, lower node plate, vertical bar, and web member;

[0039] Figure 5 It is a structural schematic diagram of the self-slope adjustment mechanism and the jacking mechanism arranged thereunder when concrete is not poured in the cavity between the jacking steel plate and the pad stone;

[0040] Figure 6 for Figure 5 Schematic diagram of the structure after pouring concrete in the cavity between the jacking steel plate and the pad stone;

[0041] Figure 7 for Figure 3 Longitudinal section view along the II-II direction;

[0042] Reference numerals:

[0043] Upper chord rod 1; lower chord rod 2; vertical rod 3;

[0044] Upper node plate 4; lower node plate 5; web member 6;

[0045] Slope adjustment steel plate 7; support pressure steel plate 8; support 9;

[0046] Slide plate 10; support slide 11; lifting steel plate 12;

[0047] Leveling bolt 13; limiting nut 14; jack 15;

[0048] Shear nail 16; fixing screw 17; upper steel plate 18;

[0049] L-shaped steel plate 19; first screw 20; second screw 21;

[0050] The third screw 22; the bridge deck 23; the T beam 24;

[0051] Cap beam 25; pad stone 26. DETAILED DESCRIPTION

[0052] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0053] It should be noted that, in the absence of conflict, the features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the embodiments and in conjunction with the accompanying drawings.

[0054] In the prior art, although part of the bridge deck load can be shared by the original beam (e.g., T-beam) and the newly added beam (e.g., I-beam), the bridge deck load cannot be shared to a large extent (i.e., cannot be shared effectively) to reduce the burden on the bridge deck. In other words, the efficiency of the newly added beam in sharing the bridge deck load is low.

[0055] Based on this, the present invention provides a load transfer device and method for a bridge system. First, the first transfer component of the transfer mechanism can realize the initial transfer of the bridge deck load. Second, the second transfer component of the transfer mechanism can share the bridge deck load borne by the first transfer component, that is, to realize the secondary transfer of the bridge deck load. It is precisely because the second transfer component is set on the basis of the first transfer component that the effective transfer of the bridge deck load is realized, which greatly improves the transfer efficiency of the bridge deck load.

[0056] Figure 1A schematic diagram of a load transfer device for a bridge system provided by the present invention in the transverse direction of the bridge. Figure 2 for Figure 1 The rightmost transfer mechanism and the supporting mechanism arranged below are shown in the schematic diagram along the bridge. Figure 3 for Figure 2 Enlarged structural diagram of the middle upper chord, upper node plate, and web. Figure 4 for Figure 2 The enlarged structural diagram of the middle and lower chord, lower node plate, vertical rod, and web member. Figure 5 It is a structural schematic diagram of the self-slope adjustment mechanism and the jacking mechanism arranged thereunder when concrete is not poured in the cavity between the jacking steel plate and the pad stone. Figure 6 for Figure 5 Schematic diagram of the structure after pouring concrete in the cavity between the jacking steel plate and the pad stone. Figure 7 for Figure 3 Longitudinal section view along the II-II direction.

[0057] Combination Figure 1 and Figure 2 The present invention provides a load transfer device for a bridge system, comprising: a transfer mechanism disposed between a plurality of T-beams 24 for transferring the load of the bridge deck 23, a support mechanism fixedly disposed below the transfer mechanism for supporting the transfer mechanism, the support mechanism fixedly disposed above the pad stone 26, and the transfer mechanism fixedly disposed below the bridge deck 23;

[0058] The transfer mechanism includes a plurality of transfer assemblies, each of which includes a first transfer assembly and a pair of second transfer assemblies symmetrically arranged on both sides of the first transfer assembly;

[0059] The first transfer assembly includes an upper chord 1 fixedly disposed below the bridge deck 23, a lower chord 2 fixedly disposed above the support mechanism, and a vertical rod 3 fixedly disposed between the upper chord 1 and the lower chord 2;

[0060] The second transfer assembly includes an upper node plate 4 fixedly arranged on one side of the upper chord 1, a lower node plate 5 fixedly arranged on one side of the lower chord 2, and a web member 6 fixedly arranged between the upper node plate 4 and the lower node plate 5;

[0061] The vertical rod 3 is fixedly connected to the upper chord rod 1, and the vertical rod 3 is fixedly connected to the lower node plate 5;

[0062] The bridge deck 23 and the upper chord 1 are fixedly connected by shear nails 16, the upper chord 1 and the upper node plate 4 are fixedly connected by a first connecting assembly, and the upper node plate 4 and the web member 6 are connected by fixing screws 17;

[0063] The web member 6 and the lower node plate 5 are connected by the fixing screws 17, and the lower node plate 5 and the lower chord member 2 are connected by the fixing screws 17;

[0064] The angle between the center line of the web member 6 and the center line of the lower chord member 2 ranges from [20° to 80°], where 20° is the lower limit of the angle and 80° is the upper limit of the angle;

[0065] The support mechanism comprises a self-slope-adjusting mechanism arranged below the support mechanism, and a lifting mechanism fixedly arranged below the self-slope-adjusting mechanism for lifting the self-slope-adjusting mechanism;

[0066] The self-slope adjustment mechanism includes a slope adjustment steel plate 7, a support pressure steel plate 8, a support 9, a slide plate 10, and a support slide groove 11 which are arranged in sequence from top to bottom. The bottom of the slope adjustment steel plate 7 is provided with a spherical convex portion, the top of the support pressure steel plate 8 is provided with a spherical groove adapted to the spherical convex portion, the bottom of the support pressure steel plate 8 is provided with the support 9, the bottom of the support 9 is provided with the slide plate 10, and the slide plate 10 is located in the support slide groove 11 adapted to the slide plate 10;

[0067] The jacking mechanism includes a jacking steel plate 12 fixedly arranged below the support slide groove 11, leveling bolts 13 passing through the four corners of the jacking steel plate 12, a limit nut 14 arranged below the leveling bolts 13 for limiting the height of the jacking steel plate 12, and a jack 15 arranged in the cavity between the pad stone 26 and the jacking steel plate 12 for lifting the jacking steel plate 12 upward, and the leveling bolts 13 are installed in the pad stone 26.

[0068] Among them, in the jacking mechanism, when the jack 15 is working, the jacking steel plate 12 can be pushed upward, so that the upper chord 1 (belonging to the first transfer assembly) moves upward, and the top of the upper chord 1 is against the bottom of the bridge deck 23. When the jacking force reaches the requirement, the limit nut 14 can be used to fix the height of the jacking steel plate 12 to ensure the stability of the upward jacking force.

[0069] Furthermore, when the vehicle travels on the bridge deck 23, the transfer mechanism will be subjected to downward pressure (i.e., the bridge deck load). As can be seen from the foregoing, the jacking mechanism has an upward lifting force on the transfer mechanism, and the lifting force and pressure are balanced. Since the transfer mechanism includes a second transfer component, the second transfer component can reduce the pressure on the first transfer component, share the bridge deck load borne by the first transfer component, and greatly improve the efficiency of sharing the bridge deck load.

[0070] In the self-slope adjusting mechanism, when the vehicle applies downward pressure to the bridge deck 23, the spherical protrusion opened at the bottom of the slope adjusting steel plate 7 can rotate 360° in the spherical groove opened at the bottom of the support pressure steel plate 8. For example, the spherical protrusion of the slope adjusting steel plate 7 can automatically deflect as the force changes, so that the support pressure steel plate 8 is evenly stressed.

[0071] In the self-slope adjusting mechanism, when the vehicle applies downward pressure on the bridge deck 23 so that the slope of the bridge deck 23 changes to a certain extent, the skateboard 10 arranged below it (i.e. the bridge deck 23) is close to the support 9, and there is a sliding gap between the skateboard 10 and the support slide groove 11 arranged on the outer periphery of the skateboard 10. The skateboard 10 can slide in the above-mentioned gap (for example, slide forward and backward, left and right) until it slides to the position to be supported, thereby supporting the bridge deck 23.

[0072] Optionally, the slide plate 10 may also be replaced by silicone grease to ensure that the slide plate 10 can slide in the support slide groove 11 .

[0073] Optionally, the support pressure steel plate 8 and the support 9 can be independent components or integrated components, which can be specifically configured according to actual conditions.

[0074] In the specific implementation, first, a supporting mechanism (specifically a self-slope-adjusting mechanism and a jacking mechanism) is installed on the pad stone 26 .

[0075] Secondly, install the first transfer assembly and part of the second transfer assembly (specifically the lower node plate 5) above the self-slope adjusting mechanism. For example, the upper chord 1 can be fixedly arranged (for example, by shear nails) under the bridge deck 23, and then the vertical rod 3 is welded to the lower surface of the upper chord 1, and then the lower node plate 5 is welded under the vertical rod 3, and the lower chord 2 is welded on one side of the lower node plate 5, and finally the lower chord 2 and the supporting mechanism (specifically the slope adjusting steel plate 7) are fixedly connected.

[0076] Third, the remaining second transfer assemblies are installed on the first transfer assembly, and the upper node plate 4 is first arranged on one side of the upper chord 1, and then a pair of web members 6 are symmetrically arranged below the upper node plate 6, and then the pair of web members 6 are connected to the lower node plate 5. It can be understood that the lower node plate 5 is installed on one side of the lower chord 2.

[0077] It can be understood that the upper node plate 4 is arranged on one side of the upper chord 1 (referred to as the first side), and the lower node plate 5 is arranged on one side of the lower chord 2 (referred to as the second side), and the first side and the second side are the same side.

[0078] Among them, the upper chord 1 and the upper node plate 4 are fixedly connected by the first connecting component, and the lower node plate 5 and the lower chord 2 are fixedly connected by the fixing screws 17. Although the connection relationship between the chord and the node plate is different here, the purpose is to connect the chord, the web 6, and the node plate, so that the web 6 (belonging to the second connecting component) can share the bridge deck load borne by the chord (belonging to the first connecting component).

[0079] In a specific implementation, first, the upper chord 1 can be connected under the bridge deck 23 through the shear nails 16. Secondly, the upper node plate 4 is connected on one side of the upper chord 1 through the first connecting assembly. Thirdly, the upper node plate 4 and the web 6 are connected through the fixing screws 17.

[0080] Preferably, when the angle value is 45°, the load-bearing capacity of the web member 6 is better.

[0081] In a specific implementation, when the web member 6 is installed on the lower chord member 2, the angle between the web member 6 and the lower chord member 2 may be adjusted to a suitable angle (for example, 45°) before subsequent installation.

[0082] The beneficial effect reasoning analysis is as follows:

[0083] In the prior art, although part of the bridge deck load can be shared by the original beam (e.g., T-beam) and the newly added beam (e.g., I-beam), the bridge deck load cannot be shared to a large extent (i.e., cannot be shared effectively) to reduce the burden on the bridge deck. In other words, the efficiency of the newly added beam in sharing the bridge deck load is low.

[0084] In the technical solution provided by the present invention, firstly, a first transfer assembly is arranged below the bridge deck. Specifically, an upper chord 1, a vertical bar 3, and a lower chord 2 can be arranged in sequence below the bridge deck. Secondly, a pair of second transfer assemblies are symmetrically arranged on both sides of the first transfer assembly. Specifically, an upper node plate 4 can be arranged on one side of the upper chord 1, and then a web member 6 and a lower node plate 5 are arranged in sequence below the upper node plate 4. Among them, the lower node plate 5 is arranged on one side of the lower chord 2. It should be noted that the upper node plate 4 is on one side of the upper chord 1, and the lower node plate 5 is on one side of the lower chord 5, and the above two sides are on the same side. Thirdly, a supporting mechanism is arranged below the lower chord 5. Specifically, a self-slope adjustment mechanism and a jacking mechanism can be arranged in sequence below the lower chord 5. Fourthly, a cushion stone 26 and a cap beam 25 are arranged in sequence below the jacking mechanism.

[0085] It is also because a pair of second transfer assemblies are symmetrically arranged on one side of the first transfer assembly that, firstly, the T-beam 24 and the first transfer assembly can bear the bridge deck load. Secondly, the second transfer assembly can share the bridge deck load borne by the first transfer assembly, thereby reducing the burden on the bridge deck. In other words, the first transfer assembly and the second transfer assembly can jointly bear the bridge deck load.

[0086] Therefore, the technical solution of the present invention is adopted to greatly improve the load sharing efficiency of the bridge deck.

[0087] In the embodiment described above, a load transfer device for a bridge system is introduced. In another embodiment of the present invention, a specific structure of the first connecting component is introduced.

[0088] For example, the first connecting component includes an upper steel plate 18 arranged below the upper chord 1, a pair of L-shaped steel plates 19 vertically symmetrically arranged on both sides of the upper steel plate 18 and fixedly connected to the upper steel plate 18 by shear nails 16, the L-shaped steel plate 19 and the upper node plate 4 are fixedly connected by a first screw 20, the upper node plate 4 and the web 6 are connected by a second screw 21, and the upper node plate 4 and the upper steel plate 8 are fixedly connected by a third screw 22.

[0089] The upper chord 2 and the upper node plate 4 are connected by an upper pad steel plate 18, a shear nail 16, an L-shaped steel plate 19, a first screw 20, and a third screw 22. It can be understood that the above components belong to the first connection component, the purpose of which is to connect the upper chord 2 and the upper node plate 4.

[0090] In the above-mentioned embodiment, the specific structure of the first connection assembly is introduced. In another embodiment of the present invention, the specific connection relationship between the vertical rod 3, the upper chord rod 2, and the lower node plate 5 is introduced.

[0091] For example, the vertical rod 3 and the upper chord rod 2 are connected by the second screw 21 , and the vertical rod 3 and the lower node plate 5 are connected by the second screw 21 .

[0092] Among them, the upper end of the vertical rod 3 is connected to the chord rod 2, and the lower end is connected to the node plate. The purpose is to realize the connection between the first transfer component (including the vertical rod 3 and the upper chord rod 2) and the second transfer component (including the node plate, for example, the lower node plate 5), so that the second transfer component can share the bridge deck load borne by the first transfer component.

[0093] In a specific implementation, first, a first transfer assembly (specifically including an upper chord rod 2 and a vertical rod 3) can be arranged below the bridge deck 23. Secondly, a lower node plate 5 can be installed on one side of the lower end of the vertical rod 3, thereby completing the connection between the first transfer assembly and the second transfer assembly.

[0094] In the above-mentioned embodiment, the specific connection relationship between the vertical rod 3, the upper chord rod 2, and the lower node plate 5 is introduced. In another embodiment of the present invention, the specific types of the first screw 20, the second screw 21, and the third screw 22 are introduced.

[0095] For example, the first screw 20 includes a limiting screw, the second screw 21 includes a fixing screw, and the third screw 22 includes a thrust screw.

[0096] In the above-mentioned embodiment, specific types of the first screw 20, the second screw 21, and the third screw 22 are introduced. In another embodiment of the present invention, a method for load transfer using the above-mentioned load transfer device for a bridge system is introduced, and the method includes:

[0097] Step 1: Casting the cushion stone 26: Casting the cushion stone 26 on the cap beam 25, and embedding four leveling bolts 13 in the cushion stone 26;

[0098] Step 2: Install the lifting mechanism, insert a limit nut 14 into each of the four leveling bolts 13, insert the lifting steel plate 12 above the limit nut 14, and adjust the limit nut 14 to make the lifting steel plate 12 level;

[0099] Step 3: Install the self-slope adjustment mechanism, weld the support chute 11 on the upper surface of the jacking steel plate 12, place the slide plate 10 in the support chute 11, place the support 9 on the upper surface of the slide plate 10, and place the support pressure steel plate 8 on the support 9, so that the spherical convex part of the jacking steel plate 12 is in the spherical groove of the support pressure steel plate 8, and the center of gravity of the jacking steel plate 12, the support chute 11, the support 9, the support pressure steel plate 8, and the slope adjustment steel plate 7 coincide;

[0100] Step 4: Install the transfer mechanism. First, install the first transfer assembly and the lower node plate 5. Set the upper chord 1 on the lower surface of the bridge deck 23, set the lower chord 2 on the upper surface of the slope adjustment steel plate 7, set the vertical rod 3 below the upper chord 1, set the lower node plate 5 below the vertical rod 3, and set the lower chord 2 on one side of the lower node plate 5, so that the upper chord 1, the vertical rod 3, and the lower chord 2 form an I-shape;

[0101] Then install the second transfer assembly, and symmetrically install two pairs of web members 6 on both sides of the vertical rod 3, the upper ends of the web members 6 are connected to the upper node plate 4, the upper node plate 4 is connected to the upper chord 1, the lower ends of the web members 6 are connected to the lower node plate 5, and the lower node plate 5 is connected to the lower chord 2;

[0102] Step 5: Lifting the transfer mechanism. Place a jack 15 between the lifting steel plate 12 and the cushion stone 26. The jack 15 lifts the lifting steel plate 12 upward. The lifting steel plate 12 lifts the self-slope adjustment mechanism upward. The self-slope adjustment mechanism lifts the lower chord 2 upward. Since the lower chord 2 is connected to the vertical rod 3 through the lower node plate 5, and the lower chord 2 is connected to the web rod 6 through the lower node plate 5, the vertical rod 3 can lift the upper chord 1 upward. The web rod 6 can lift the upper chord 1 upward. The upper chord 1 lifts the bridge deck 23 upward, thereby transferring the load of the bridge deck 23.

[0103] Step 6: Tighten the leveling bolts 13. When the lifting force reaches the preset requirement, tighten the leveling bolts 13 to ensure the position of the transfer mechanism and the size of the lifting force.

[0104] Step 7: Concrete is poured into the cavity between the jacking steel plate 12 and the pad stone 26, so that the upper surface of the concrete is flush with the lower panel of the jacking steel plate 12, thereby ensuring the stability of the jacking steel plate 12 and further ensuring the size of the jacking force.

[0105] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A load transfer device for a bridge system, the bridge system comprising a bridge deck (23), a plurality of T-beams (24) arranged below the bridge deck (23) for bearing the load of the bridge deck (23), a cap beam (25) arranged below the plurality of T-beams (24) for transferring the load of the bridge deck (23) to the ground, a pad stone (26) for installing the load transfer device cast above the cap beam (25), characterized in that: include: A transfer mechanism for transferring the load of the bridge deck (23) is arranged between the plurality of T-beams (24); a support mechanism for supporting the transfer mechanism is fixedly arranged below the transfer mechanism, the support mechanism is fixedly arranged above the cushion stone (26); and the transfer mechanism is fixedly arranged below the bridge deck (23); The transfer mechanism includes a plurality of transfer assemblies, each of which includes a first transfer assembly and a pair of second transfer assemblies symmetrically arranged on both sides of the first transfer assembly; The first transfer assembly comprises an upper chord (1) fixedly arranged below the bridge deck (23), a lower chord (2) fixedly arranged above the support mechanism, and a vertical rod (3) fixedly arranged between the upper chord (1) and the lower chord (2); The second transfer assembly comprises an upper node plate (4) fixedly arranged on one side of the upper chord (1), a lower node plate (5) fixedly arranged on one side of the lower chord (2), and a web member (6) fixedly arranged between the upper node plate (4) and the lower node plate (5); The vertical rod (3) and the upper chord rod (1) are fixedly connected, and the vertical rod (3) and the lower node plate (5) are fixedly connected; The bridge deck (23) and the upper chord (1) are fixedly connected via shear nails (16), the upper chord (1) and the upper node plate (4) are fixedly connected via a first connecting assembly, and the upper node plate (4) and the web member (6) are connected via fixing screws (17); The web member (6) and the lower node plate (5) are connected via the fixing screws (17), and the lower node plate (5) and the lower chord member (2) are connected via the fixing screws (17); The included angle range between the center line of the web member (6) and the center line of the lower chord member (2) includes [20°, 80°], wherein 20° is the lower limit of the included angle and 80° is the upper limit of the included angle; The support mechanism comprises a self-slope-adjusting mechanism arranged below the support mechanism, and a lifting mechanism fixedly arranged below the self-slope-adjusting mechanism for lifting the self-slope-adjusting mechanism; The self-slope adjustment mechanism comprises a slope adjustment steel plate (7), a support pressure steel plate (8), a support (9), a slide plate (10), and a support slide groove (11) which are arranged in sequence from top to bottom, the bottom of the slope adjustment steel plate (7) is provided with a spherical convex portion, the top of the support pressure steel plate (8) is provided with a spherical groove adapted to the spherical convex portion, the bottom of the support pressure steel plate (8) is provided with the support (9), the bottom of the support (9) is provided with the slide plate (10), and the slide plate (10) is located in the support slide groove (11) adapted to the slide plate (10); The lifting mechanism comprises a lifting steel plate (12) fixedly arranged below the support slide groove (11), leveling bolts (13) passing through the four corners of the lifting steel plate (12), a limit nut (14) arranged below the leveling bolts (13) for limiting the height of the lifting steel plate (12), and a jack (15) arranged in the cavity between the pad stone (26) and the lifting steel plate (12) for lifting the lifting steel plate (12) upwards, and the leveling bolts (13) are installed in the pad stone (26).

2. A load transfer device for a bridge system according to claim 1, characterized in that: The first connection assembly comprises an upper steel plate (18) arranged below the upper chord (1), a pair of L-shaped steel plates (19) vertically symmetrically arranged on both sides of the upper steel plate (18) and fixedly connected to the upper steel plate (18) via the shear nails (16), the L-shaped steel plate (19) and the upper node plate (4) are fixedly connected via a first screw (20), the upper node plate (4) and the web (6) are connected via a second screw (21), and the upper node plate (4) and the upper steel plate (8) are fixedly connected via a third screw (22).

3. A load transfer device for a bridge system according to claim 2, characterized in that: The vertical rod (3) and the upper chord rod (2) are connected via the second screw (21), and the vertical rod (3) and the lower node plate (5) are connected via the second screw (21).

4. A load transfer device for a bridge system according to claim 3, characterized in that: The first screw (20) comprises a limit screw, the second screw (21) comprises a fixing screw, and the third screw (22) comprises a thrust screw.

5. A method for load transfer using the load transfer device for a bridge system according to claim 1, characterized in that: include: Step 1: Casting of the cushion stone (26): Casting the cushion stone (26) on the cap beam (25), wherein four leveling bolts (13) are pre-embedded in the cushion stone (26); Step 2: Install the lifting mechanism, insert a limiting nut (14) into each of the four leveling bolts (13), insert a lifting steel plate (12) above the limiting nut (14), and adjust the limiting nut (14) to make the lifting steel plate (12) level; Step 3: Install the self-slope adjustment mechanism, weld a support chute (11) on the upper surface of the lifting steel plate (12), place a slide plate (10) in the support chute (11), place a support (9) on the upper surface of the slide plate (10), and place a support pressure-bearing steel plate (8) on the support (9), so that the spherical convex part of the lifting steel plate (12) is in the spherical groove of the support pressure-bearing steel plate (8), and the center of gravity of the lifting steel plate (12) and the support chute (11), the support (9), the support pressure-bearing steel plate (8), and the slope adjustment steel plate (7) coincide; Step 4: Install the transfer mechanism, first install the first transfer assembly and the lower node plate (5), set the upper chord (1) on the lower surface of the bridge deck (23), set the lower chord (2) on the upper surface of the slope adjustment steel plate (7), set the vertical rod (3) below the upper chord (1), set the lower node plate (5) below the vertical rod (3), and set the lower chord (2) on one side of the lower node plate (5), so that the upper chord (1), the vertical rod (3), and the lower chord (2) form an I-shape; Then, a second transfer assembly is installed, and two pairs of web members (6) are symmetrically installed on both sides of the vertical rod (3), the upper ends of the web members (6) are connected to the upper node plate (4), the upper node plate (4) is connected to the upper chord (1), the lower ends of the web members (6) are connected to the lower node plate (5), and the lower node plate (5) is connected to the lower chord (2); Step 5: lifting and transferring mechanism. A jack (15) is placed between the lifting steel plate (12) and the cushion stone (26). The jack (15) lifts the lifting steel plate (12) upward. The lifting steel plate (12) lifts the self-slope adjusting mechanism upward. The self-slope adjusting mechanism lifts the lower chord (2) upward. Since the lower chord (2) is connected to the vertical rod (3) via the lower node plate (5), and the lower chord (2) is connected to the web rod (6) via the lower node plate (5), the vertical rod (3) can lift the upper chord (1) upward. The web rod (6) can lift the upper chord (1) upward. The upper chord (1) lifts the bridge deck (23) upward, thereby transferring the load of the bridge deck (23). Step 6, tighten the leveling bolt (13). When the lifting force reaches the preset requirement, tighten the leveling bolt (13) to ensure the position of the transfer mechanism and the size of the lifting force; Step seven: pour concrete into the cavity between the lifting steel plate (12) and the cushion stone (26) so that the upper surface of the concrete is flush with the lower panel of the lifting steel plate (12), thereby ensuring the stability of the lifting steel plate (12) and further ensuring the magnitude of the lifting force.

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