Aluminum alloy bridge span top block for horizontal pushing type mechanical bridge

Abstract

The utility model belongs to the technical field of mechanized bridges, and particularly relates to a top block of an aluminum alloy bridge span. An aluminum alloy bridge span top block for a horizontal pushing type mechanical bridge comprises a convex top block and a concave top block. The convex top block comprises a transition plate A and a convex bearing block; the transition plate A and the bridge span body are in interference fit and are connected through a welding seam; the convex bearing block and the cab apron A are in interference fit and are connected through a screw; the concave top block comprises a transition plate B and a concave bearing block; the transition plate B is in interference fit with the bridge span body and is connected with the bridge span body through a welding seam; the concave bearing block is in interference fit with the transition plate B and is connected with the transition plate B through screws; the convex bearing block and the concave bearing block on the opposite surfaces of the convex top block and the concave top block are mutually extruded and are meshed together through convex and concave parts on the convex bearing block and the concave bearing block. According to the utility model, local extrusion deformation of the aluminum alloy top block caused by overlarge local pressure, breakage of a convex-concave contact part of the top block for transmitting shearing force due to bearing of huge shearing force, and cracking of a welding seam at a connecting part of the top block and a bridge span structure are avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of mechanized bridge, specifically relates to a top block of aluminium alloy bridge span. BACKGROUND

[0002] In order to reduce weight, aluminium alloy material starts to be applied to the bridge span of mechanized bridge. The length of the longest aluminium alloy bridge span is 23 meters, and the bearing capacity is 25 tons. The material of the top block between two bridge joints is the same as the bridge span, which is also aluminium alloy. At present, the maximum extrusion force of the aluminium alloy bridge span top block is 70 tons, and the maximum shear force is 7 tons.

[0003] With the increase of the length of the bridge span to 26 meters and the increase of the bearing load to 63.5 tons, the maximum extrusion force that the top block needs to bear reaches 220 tons, and the maximum shear force is 21 tons. The size of the existing aluminium alloy top block is limited by the structure, and it cannot transmit the huge pressure and shear force between the bridge joints. In the process of use, the aluminium alloy top block often appears local extrusion deformation due to excessive local pressure, the convex-concave contact part of the top block transmitting shear force is fractured due to bearing huge shear force, and the weld of the connecting part of the top block and the bridge span structure is cracked. SUMMARY

[0004] The utility model aims at avoiding the local extrusion deformation of the aluminium alloy top block due to excessive local pressure, the fracture of the convex-concave contact part of the top block transmitting shear force due to bearing huge shear force, and the cracking of the weld of the connecting part of the top block and the bridge span structure in the process of use, and provides an aluminium alloy bridge span top block for flat-pushing type mechanized bridge.

[0005] The technical scheme of the utility model is: an aluminium alloy bridge span top block for flat-pushing type mechanized bridge, which comprises: a convex top block and a concave top block.

[0006] The convex top block comprises: a transition plate A and a convex bearing block. The transition plate A is in interference fit with the bridge span body and is connected through a weld. The convex bearing block is in interference fit with the transition plate A and is connected through a screw.

[0007] The concave top block comprises: a transition plate B and a concave bearing block. The transition plate B is in interference fit with the bridge span body and is connected through a weld. The concave bearing block is in interference fit with the transition plate B and is connected through a screw.

[0008] The convex bearing block and the concave bearing block on the opposite faces of the convex top block and the concave top block extrude each other and are engaged together through the convex-concave parts on the convex bearing block and the concave bearing block.

[0009] On the basis of the above scheme, in order to ensure the smooth engagement of the convex top block and the concave top block in the process of use, the convex part of the convex bearing block is a circular arc transition.

[0010] In the above scheme, specifically, the convex bearing block is connected with the transition plate A through the interference fit of the pin and the hole of the transition plate A, and then connected with the transition plate A through the screw.

[0011] In the above scheme, specifically, the convex bearing block is connected with the transition plate A through the interference fit of the pin and the hole of the transition plate A, and then connected with the transition plate A through the screw.

[0012] In the above scheme, specifically, the transition plate A and the transition plate B are made of aluminum alloy material, and the convex bearing block and the concave bearing block are made of high-strength steel material.

[0013] Principle of use:

[0014] In the process of using the flat push type bridge span, the pressure and shear force are transmitted between the contact parts of the top blocks of the two bridge segments. The convex top block is on one bridge segment, and the concave top block is on the other bridge segment. The convex and concave parts of the two top blocks are engaged with each other. The outside of the top block is nested with a bearing block made of high-strength steel material. The bearing block is connected with the aluminum alloy transition plate of the top block through the interference fit of the pin and the hole of the transition plate, and then connected with the aluminum alloy transition plate through the screw. Because there is a certain angle between the two bridge segments during the erection of the two bridge segments, the top blocks are in line contact during the contact process, and the contact stress between the top blocks is very large. Therefore, the bearing block made of high-strength steel material can withstand the huge local contact stress. In the process of use, the shear force of one bridge segment is transmitted to the other bridge segment through the top block. The shear force on the top block is first transmitted to the bearing block of the other top block by the bearing block of one top block. The pin structure of the bearing block transmits the shear force to the aluminum alloy transition plate. The aluminum alloy transition plate transmits the shear force to the structure of the other bridge segment through the interference fit and the welding seam connection with the bridge segment structure. The structure of the aluminum alloy transition plate makes the transition plate body and the welding seam jointly bear the shear force, thereby avoiding the cracking of the welding seam due to the excessive shear stress.

[0015] Advantages:

[0016] (1) In the utility model, the bearing block is connected with the transition plate through the interference fit, and then connected with the transition plate through the screw. The transition plate is connected with the structure of the bridge segment through the interference fit and the welding seam, and transmits the shear force to the structure of the other bridge segment. The structure of the transition plate makes the transition plate body and the welding seam jointly bear the shear force, thereby avoiding the cracking of the welding seam due to the excessive shear stress.

[0017] (2) In the utility model, the convex part of the convex top block is a circular arc transition, which ensures the smooth engagement of the top block in the process of use.

[0018] (3) In the utility model, the bearing block made of high-strength steel material can withstand the huge local contact stress, because there is a certain angle between the two bridge segments during the erection of the two bridge segments, which causes the top blocks to be in line contact during the contact process, and the contact stress between the top blocks is very large. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the whole structure schematic view of the utility model;

[0020] Figure 2 It is the structure schematic view of the utility model convex top block;

[0021] Figure 3 It is Figure 2 The AA direction section view of the utility model;

[0022] Figure 4 It is the structure schematic view of the utility model concave top block;

[0023] Figure 5 It is Figure 4 The AA direction section view of the utility model;

[0024] In the drawing: 1-convex top block, 1.1-transition plate A, 1.2-convex bearing block, 2-concave top block, 2.1-transition plate B, 2.2-concave bearing block. Specific implementation

[0025] The utility model will be further explained in detail in combination with the drawings and examples.

[0026] Referring to the accompanying Figure 1 An aluminum alloy bridge span top block for flat push type mechanized bridge, comprising: convex top block 1 and concave top block 2.

[0027] Referring to the accompanying Figure 2 、 3 Convex top block 1 includes transition plate A 1.1 and convex bearing block 1.2; transition plate A 1.1 is of aluminum alloy material, and convex bearing block 1.2 is of high-strength steel material.Transition plate A 1.1 is in interference fit with the bridge span body and is connected through a weld joint, and convex bearing block 1.2 is in interference fit with the hole of transition plate A 1.1 through a pin and is connected with transition plate A 1.1 through a screw.

[0028] Referring to the accompanying Figure 4 、 5 Concave top block 2 includes transition plate B 2.1 and concave bearing block 2.2; transition plate B 2.1 is of aluminum alloy material, and concave bearing block 2.2 is of high-strength steel material.Transition plate B 2.1 is in interference fit with the bridge span body and is connected through a weld joint, and concave bearing block 2.2 is in interference fit with the hole of transition plate B 2.1 through a pin and is connected with transition plate B 2.1 through a screw.

[0029] The convex bearing block 1.2 and the concave bearing block 2.2 on the opposite faces of the convex top block 1 and the concave top block 2 extrude each other and are engaged together through the convex and concave parts on the convex bearing block 1.2 and the concave bearing block 2.2.To ensure the smooth engagement of the convex top block 1 and the concave top block 2 in the use process, the convex part of the convex bearing block 1.2 is in arc transition.

[0030] In the process of using the bridge span, the pressure and shear force are transmitted between the contact parts of the top blocks of the two bridge segments. The top block of one bridge segment is convex, and the top block of the other bridge segment is concave. The convex and concave parts of the two top blocks are engaged with each other. The outside of the top block is nested with a high-strength steel bearing block. The bearing block is connected with the aluminum alloy transition plate through the interference fit of the pin and the hole of the aluminum alloy transition plate, and then through the screw. Due to the certain angle between the two bridge segments during erection, the top blocks are in linear contact during contact, and the contact stress between the top blocks is very large, so the high-strength steel bearing block can withstand the huge local contact stress. In the process of use, the shear force of one bridge segment is transmitted to the other bridge segment through the top block. The shear force on the top block is first transmitted to the bearing block of the other top block by the bearing block of one top block. The pin structure of the bearing block transmits the shear force to the aluminum alloy transition plate. The aluminum alloy transition plate transmits the shear force to the other bridge segment structure through the interference fit and the weld joint with the bridge segment structure. The structure of the aluminum alloy transition plate makes the transition plate body and the weld joint bear the shear force together, avoiding the crack of the weld joint due to the excessive shear stress.

[0031] Although the utility model has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model belong to the scope of protection required by the utility model.

Claims

1. An aluminum alloy bridge deck block for a flatbed mechanized bridge comprising: The convex top block (1) and the concave top block (2); characterized in that: The convex top block (1) comprises a transition plate A (1.1) and a convex carrier block (1.2); the transition plate A (1.1) is in interference fit with the bridge span body and is connected by a weld seam, and the convex carrier block (1.2) is in interference fit with the transition plate A (1.1) and is connected by a screw; The concave top block (2) comprises a transition plate B (2.1) and a concave carrier block (2.2); the transition plate B (2.1) is in interference fit with the bridge span body and is connected by a weld seam, and the concave carrier block (2.2) is in interference fit with the transition plate B (2.1) and is connected by a screw; The convex carrier block (1.2) and the concave carrier block (2.2) on the opposite sides of the convex top block (1) and the concave top block (2) are pressed against each other and are engaged together through convex and concave parts on the convex carrier block (1.2) and the concave carrier block (2.2).

2. An aluminum alloy bridge deck panel for a flatbed mechanized bridge as defined in claim 1 wherein: The convex part of the convex carrier block (1.2) is a circular arc transition.

3. An aluminum alloy bridge deck panel for a flatbed mechanized bridge as defined in claim 1 wherein: The convex carrier block (1.2) is in interference fit with the hole of the transition plate A (1.1) through a pin, and is connected with the transition plate A (1.1) through a screw.

4. An aluminum alloy bridge deck panel for a flatbed mechanized bridge as defined in any one of claims 1 to 3, characterized in that: The concave carrier block (2.2) is in interference fit with the hole of the transition plate B (2.1) through a pin, and is connected with the transition plate B (2.1) through a screw.

5. An aluminum alloy bridge deck panel for a flatbed mechanized bridge as defined in claim 1 wherein: The transition plate A (1.1) and the transition plate B (2.1) are made of aluminum alloy material, and the convex carrier block (1.2) and the concave carrier block (2.2) are made of high-strength steel material.

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