Double-layer steel truss structure for bridge construction

Abstract

The double-layer steel truss structure for bridge construction comprises an upper truss and a lower truss which are arranged at intervals, the lower truss and the upper truss are detachably connected through a plurality of supporting mechanisms, and a plurality of buffering mechanisms are arranged on the face, away from the supporting mechanisms, of the lower truss at intervals. By improving the structure of the existing double-layer steel truss and adopting the sectional assembly design, the double-layer steel truss can be disassembled into a plurality of relatively independent components in the transportation process, the transportation difficulty is reduced, the later maintenance is also facilitated, and the buffering mechanism is additionally arranged in the use process, so that the transportation efficiency is improved. When the double-layer steel truss is vibrated, part of force generated during vibration can be actively absorbed and stored, then buffering force borne by the double-layer steel truss during vibration is reduced, fatigue damage of the structure caused by repeated vibration stress action is reduced, and the service life of the steel truss is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of double -deck steel truss, especially to a double -deck steel truss structure for bridge construction. BACKGROUND

[0002] The double -deck steel truss structure is widely used in various large -scale bridge engineering owing to its high strength, good stability and reasonable mechanical properties and the like advantages, and guarantees the safety and durability of the bridge in the long -term use.

[0003] The existing double -deck steel truss structure is usually integrally designed, and the overall volume is large and the weight is heavy, and this structure form makes the transportation process extremely inconvenient, on the one hand, owing to the excessively large structure size, it is difficult to select conventional transport vehicles and transport routes, and often needs to rely on special large -scale transport equipment, which not only increases the transportation cost, but also the scheduling and use of special large -scale transport equipment are restricted by many factors, such as limited equipment quantity, limited transport time arrangement, and the like, on the other hand, in the transportation process, the large and heavy structure is difficult to be effectively fixed and protected, and is prone to deformation, damage and the like due to reasons such as road bumps, collision and the like, and the existing double -deck steel truss structure when subjected to vibration, the stress inside the structure will repeatedly change with the continuation of vibration, and these repeated vibration stresses will cause fatigue damage to the structure, and long -term accumulation will cause the strength and stiffness of the structure to gradually decrease, and cracks, deformation and the like problems occur, therefore, we launch a new double -deck steel truss structure for bridge construction. SUMMARY

[0004] The utility model provides a double -deck steel truss structure for bridge construction to solve the above -mentioned technical problem.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A double -deck steel truss structure for bridge construction, comprising spaced apart upper truss and lower truss, the lower truss is detachably linked with the upper truss through a plurality of support mechanisms, the side of the lower truss away from the support mechanism is spaced apart and arranged with a plurality of buffer mechanisms, the buffer mechanism comprises a first connecting sleeve provided on the lower truss, and a second connecting sleeve sleeving the first connecting sleeve, the second connecting sleeve is through with the inside of the first connecting sleeve and is equipped with a moving plate, the moving plate is equipped with a fixed rod every side edge, and the side of the first connecting sleeve and the second connecting sleeve is equipped with an assembly groove in the part corresponding to the fixed rod;When the second connecting sleeve sleeves the first connecting sleeve, two assembly grooves in the same vertical direction form a sliding groove, and the fixed rod is assembled in the sliding groove and can move along the length direction of the sliding groove.

[0007] Preferably, the bottom of the first connecting sleeve and the second connecting sleeve is provided with an assembling plate, the assembling plate of the first connecting sleeve is connected with the lower truss through bolts, and the assembling plate of the second connecting sleeve is connected with the truss node of the bridge through bolts.

[0008] Preferably, the slot of the assembling groove is provided with a closing piece through bolts.

[0009] Preferably, the supporting mechanism comprises a triangular connecting frame, two connecting plates parallel to each other are arranged on the triangular connecting frame, one of the connecting plates is arranged on one corner of the triangular connecting frame, and the other connecting plate is arranged on the side of the triangular connecting frame, and the connecting plates are connected with the upper truss or the lower truss through bolts.

[0010] Preferably, the middle part of the triangular connecting frame is provided with a triangular lightening hole.

[0011] Preferably, the gap between the two adjacent supporting mechanisms is rectangular.

[0012] Compared with the prior art, the double-layer steel truss has the following beneficial effects:

[0013] 1. The double-layer steel truss can be divided into a plurality of relatively independent parts in the transportation process, so that the transportation difficulty is reduced, and the later maintenance is facilitated.

[0014] 2. When the double-layer steel truss is vibrated, the buffer mechanism can actively absorb part of the force generated during vibration, thereby reducing the buffer force of the double-layer steel truss during vibration, reducing the fatigue damage of the structure caused by repeated vibration stress, and prolonging the service life of the steel truss. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view structural schematic diagram of the utility model;

[0016] Figure 2 is a cross-sectional structural schematic diagram of the buffer mechanism of the utility model;

[0017] Figure 3 is a front view structural schematic diagram of the buffer mechanism of the utility model;

[0018] Figure 4 is a structural schematic diagram of the moving plate of the utility model;

[0019] Figure 5 is a structural schematic diagram of the supporting mechanism of the utility model.

[0020] The drawing mark: 1, upper truss, 2, lower truss, 3, support mechanism, 31, triangular connecting frame, 32, connecting plate, 33, lightening hole, 4, buffer mechanism, 41, first connecting sleeve, 42, second connecting sleeve, 43, moving plate, 44, shock absorbing spring, 45, fixed rod, 46, assembly groove, 47, assembly plate, 48, closure. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model is further described in detail below with examples and drawings, the schematic embodiment and its description of the utility model are only used to explain the utility model, and do not serve as the limitation of the utility model.

[0022] Example 1

[0023] As Figure 1 shown, a double-layer steel truss structure for bridge construction includes upper trusses 1 and lower trusses 2 arranged at intervals, and the lower trusses 2 and the upper trusses 1 are detachably linked through a plurality of support mechanisms 3. During transportation, the support mechanisms 3 are detached from the lower trusses 2 and the lower trusses 2, the originally large double-layer steel truss is divided into a plurality of relatively independent and small components, thereby reducing the transportation difficulty, facilitating the selection of a more flexible transportation mode, reducing the dependence on special large transportation equipment, and indirectly reducing the transportation cost. At the same time, the components after splitting are easier to fix and protect during transportation, which can reduce the damage such as collision and deformation that may occur during transportation due to the large and heavy structure, and ensure the integrity of the components, providing protection for subsequent smooth installation. Moreover, this segmented assembly design can be divided into a plurality of relatively independent components, which not only reduces the transportation difficulty, but also facilitates maintenance and reduces maintenance costs when one component is damaged during use.

[0024] Example 2

[0025] Further, as Figure 1 shown on the basis of the above embodiment, a plurality of buffer mechanisms 4 are arranged at intervals on the side of the lower truss 2 away from the support mechanism 3. The buffer mechanism 4 set during the use of the double-layer steel truss can actively absorb and store part of the force generated when the double-layer steel truss is vibrated, thereby reducing the buffer force received by the double-layer steel truss when it is vibrated, reducing the fatigue damage of the structure of the double-layer steel truss due to repeated vibration stress, and prolonging the service life of the steel truss. Specifically, the structure of the buffer mechanism 4 is as Figures 2-4As shown, the first connecting sleeve 41 is arranged on the lower truss 2, and the second connecting sleeve 42 is sleeved on the first connecting sleeve 41, the second connecting sleeve 42 is penetrated with the first connecting sleeve 41 and is provided with a moving plate 43, the moving plate 43 is provided between the sleeve bottom of the second connecting sleeve 42 and the sleeve bottom of the first connecting sleeve 41, and the damping spring 44 is arranged between the moving plate 43 and the sleeve bottom of the second connecting sleeve 42 and the sleeve bottom of the first connecting sleeve 41, the fixed rod 45 is arranged on each side of the moving plate 43, and the edge side of the first connecting sleeve 41 and the second connecting sleeve 42 is provided with the assembly groove 46 at the position corresponding to the fixed rod 45; when the second connecting sleeve 42 is sleeved on the first connecting sleeve 41, the two assembly grooves 46 in the same vertical direction form a sliding groove, the fixed rod 45 is assembled in the sliding groove and can move along the length direction of the sliding groove, when the double-layer steel truss is vibrated in the use process, the second connecting sleeve 42 moves up and down along the length direction of the first connecting sleeve 41, at this time, the two damping springs 44 actively absorb, store and release part of the force generated when the double-layer steel truss is vibrated, in this process, the vibration force is consumed, thereby reducing the buffer force of the double-layer steel truss when it is vibrated, reducing the fatigue damage of the structure of the double-layer steel truss due to the repeated vibration stress, and prolonging the service life of the steel truss. In the embodiment, the moving plate 43 is arranged to separate the cavity originally used for assembling the damping spring 44 into two relatively independent small cavities, two damping springs 44 can be assembled, two damping springs 44 form two damping mechanisms, the limit of which is different from the buffer mechanism 4 of the original damping spring 44, because the two damping springs 44 are separated, the force generated when the vibration is better absorbed, the purpose of improving the damping efficiency is achieved, and the fixed rod 45 on the moving plate 43 and the sliding groove formed on the first connecting sleeve 41 and the second connecting sleeve 42 cooperate with each other to limit the direction of the second connecting sleeve 42, reduce the transverse force of the second connecting sleeve 42, and further improve the service life of the second connecting sleeve 42.

[0026] As a preferred scheme of the above embodiment, the bottom of the first connecting sleeve 41 and the second connecting sleeve 42 is provided with an assembly plate 47, the assembly plate 47 of the first connecting sleeve 41 is connected with the lower truss 2 through a bolt, and the assembly plate 47 of the second connecting sleeve 42 is connected with the truss joint of the bridge through a bolt, so that the buffer mechanism 4 can be disassembled and replaced, thereby facilitating maintenance.

[0027] As a preferred scheme of the above embodiment, the slot of the assembly groove 46 is provided with a closing piece 48 assembled through a bolt, so as to avoid the situation that the fixed rod 45 is separated from the sliding groove due to the large moving amplitude of the second connecting sleeve 42.

[0028] Embodiment 3

[0029] As a preferred scheme of the above embodiment, the support mechanism 3 comprises a triangular connecting frame 31, and two connecting plates 32 parallel to each other are arranged on the triangular connecting frame 31, one of the connecting plates 32 is arranged on one corner of the triangular connecting frame 31, and the other connecting plate 32 is arranged on the side of the triangular connecting frame 31, and the connecting plate 32 is connected with the upper truss 1 or the lower truss 2 through a bolt.

[0030] As a preferred scheme of the above embodiment, the middle part of the triangular connecting frame 31 is provided with a triangular lightening hole 33, which can reduce the weight of the support mechanism 3, facilitate carrying, reduce the consumption of manufacturing materials, indirectly reduce the production cost, and effectively disperse the stress received by the support mechanism 3, improve the overall rigidity of the triangular connecting frame 31, balance the load distribution, avoid local deformation, and improve the load capacity.

[0031] As a preferred scheme of the above embodiment, the gap between the two adjacent support mechanisms 3 is rectangular, which can further balance the stress received by each support mechanism 3, balance the overall load distribution of the double-layer steel truss, and reduce the local deformation of the double-layer steel truss.

[0032] Of course, the present application can also have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application, but these corresponding changes and modifications should belong to the protection scope of the claims attached to the present application.

Claims

1. A double-layer steel truss structure for bridge construction, characterized in that, The utility model provides a kind of bridge, including spaced apart upper truss (1) and lower truss (2), the lower truss (2) is detachably linked between upper truss (1) by multiple support mechanisms (3), the side of the lower truss (2) away from support mechanism (3) is spaced apart and arranged with multiple buffer mechanisms (4), the buffer mechanism (4) includes first connecting sleeve (41) arranged on the lower truss (2), and second connecting sleeve (42) that first connecting sleeve (41) is sleeved, the inside of second connecting sleeve (42) and first connecting sleeve (41) is through and is equipped with moving plate (43), the moving plate (43) is equipped with damping spring (44) between the sleeve bottom of second connecting sleeve (42) and the sleeve bottom of first connecting sleeve (41), the moving plate (43) is equipped with fixed rod (45) every side edge, the side of first connecting sleeve (41) and second connecting sleeve (42) is equipped with assembly slot (46) in the part corresponding to fixed rod (45);When second connecting sleeve (42) is sleeved first connecting sleeve (41), two the assembly slot (46) in the same vertical direction forms sliding slot, the fixed rod (45) is assembled in the sliding slot and can be moved along the length direction of sliding slot.

2. The double-layer steel truss structure for bridge construction according to claim 1, characterized by, The bottom of first connecting sleeve (41) and second connecting sleeve (42) is equipped with assembly plate (47), the assembly plate (47) of first connecting sleeve (41) is connected with lower truss (2) by bolt, the assembly plate (47) of second connecting sleeve (42) is connected with the truss node of bridge by bolt.

3. The double-layer steel truss structure for bridge construction according to claim 2, characterized by The slot of assembly slot (46) is equipped with closure (48) by bolt.

4. The double-layer steel truss structure for bridge construction according to claim 1, characterized by Support mechanism (3) includes triangular connecting frame (31), the two connecting plates (32) parallel to each other are arranged on the triangular connecting frame (31), one of the connecting plates (32) is located on one of the corners of the triangular connecting frame (31), and the other connecting plate (32) is located on the side of the triangular connecting frame (31), the connecting plate (32) is connected with the upper truss (1) or lower truss (2) by bolt.

5. The double-layer steel truss structure for bridge construction according to claim 4, characterized by The middle part of the triangular connecting frame (31) has triangular weight-reducing hole (33).

6. The double-layer steel truss structure for bridge construction according to any one of claims 4-5, characterized in that, The gap between the adjacent two support mechanisms (3) is rectangular.

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