End mold device for expansion joint of track bed of rail bearing platform of elevated bridge

Abstract

The utility model discloses a viaduct bridge rail bearing platform ballast bed expansion joint end mold device which comprises two supporting beam plates, buffer blocks are arranged in the two supporting beam plates, butt joint beams are fixedly connected to the upper ends of the two supporting beam plates, an expansion pad is arranged between the two butt joint beams, and the upper ends of the two butt joint beams are fixedly connected with the buffer blocks. A plurality of memory alloy plates are arranged between the two supporting beam plates, a plurality of fixing pieces are arranged in the two supporting beam plates, and the fixing pieces penetrate through the buffer blocks. By arranging the buffer block, the memory alloy plate and the telescopic pad, when the beam body is stretched and deformed due to environmental factors such as air temperature and the like, the memory alloy plate deforms and is lengthened, when displacement deformation disappears, the memory alloy plate restores deformation, when a vehicle passes by, the buffer block and the telescopic pad weaken vibration, and meanwhile the telescopic pad has waterproof and dustproof functions.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to an expansion joint end mold device for a track bearing platform roadbed of an elevated bridge. Background Art

[0002] When the environmental parameters such as temperature change, the bridge will have longitudinal deformation due to expansion and contraction, and vertical and lateral bending deformation; under vehicle load, there will be longitudinal displacement and vertical bending deformation. In order to meet the deformation requirements of the bridge, expansion joint devices are usually set at the ends of the beams or between them and the back of the platform to allow free deformation such as longitudinal and vertical bending. Bridge expansion joints are divided into jointed expansion joints and seamless expansion joints. With the enhancement of comprehensive national strength, the construction of railways, highways and other projects in my country has been greatly accelerated, and the durability requirements of bridges have gradually increased. The expansion joints at the ends of beams have become one of the key factors affecting the durability of concrete bridges.

[0003] Most of the existing expansion joints of elevated track bearing platform ballasts will cause vehicle bumping, causing damage to the vehicle, greatly wasting unnecessary money, and have poor waterproofing effects and are inconvenient to maintain. Utility Model Content

[0004] The utility model aims to provide an expansion joint end mold device for the track bearing platform of an elevated bridge, which can pass through a buffer block, a memory alloy plate, and a telescopic pad. When the beam body is stretched and deformed due to environmental factors such as temperature, the memory alloy plate and the telescopic pad are deformed and elongated. When the displacement deformation disappears, the memory alloy plate and the telescopic pad restore the deformation. When a vehicle passes by, the buffer block and the telescopic pad will reduce the vibration. At the same time, the telescopic pad has waterproof and dustproof functions.

[0005] In order to achieve the above-mentioned purpose, an expansion joint end mold device of an elevated bridge track platform roadbed is provided, including a support beam plate, two support beam plates are provided, buffer blocks are provided inside the two support beam plates, the upper ends of the two support beam plates are fixedly connected with a butt beam, a telescopic pad is provided between the two butt beams, and a plurality of memory alloy plates are provided between the two support beam plates.

[0006] According to the expansion joint end mold device of the track bearing platform of an elevated bridge, a plurality of fixing parts are arranged inside the two supporting beam plates, and the fixing parts pass through the buffer block.

[0007] According to the expansion joint end mold device of the track bearing platform of an elevated bridge, the memory alloy plate is "wavy".

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] The end formwork device for the expansion joint of the track bed on the elevated bridge crosstie support platform, by setting buffer blocks, shape memory alloy plates, and expansion pads. When the beam body undergoes tensile deformation due to environmental factors such as temperature, the shape memory alloy plates deform and elongate. When the displacement deformation disappears, the shape memory alloy plates return to their original shape. When a vehicle passes by, the buffer blocks and expansion pads weaken the vibration. At the same time, the expansion pad has the functions of waterproofing and dustproofing.

[0010] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0012] Figure 1 is a perspective view of the end formwork device for the expansion joint of the track bed on the elevated bridge crosstie support platform of the present utility model;

[0013] Figure 2 is a disassembly schematic diagram of the expansion pad of the end formwork device for the expansion joint of the track bed on the elevated bridge crosstie support platform of the present utility model.

[0014] In the figure: 1, support beam plate; 2, fixing piece; 3, buffer block; 4, docking beam; 5, expansion pad; 6, shape memory alloy plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0016] Please refer to Figure 1-2 , the embodiments of the present utility model provide a technical solution: an end formwork device for the expansion joint of the track bed on the elevated bridge crosstie support platform, including support beam plates 1. There are two support beam plates 1, and buffer blocks 3 are arranged inside both of the two support beam plates 1. Docking beams 4 are fixedly connected to the upper ends of the two support beam plates 1. An expansion pad 5 is arranged between the two docking beams 4. A plurality of shape memory alloy plates 6 are arranged between the two support beam plates 1. By setting buffer blocks 3, shape memory alloy plates 6, and expansion pads 5, when the beam body undergoes tensile deformation due to environmental factors such as temperature, the shape memory alloy plates 6 and the expansion pad 5 deform and elongate. When the displacement deformation disappears, the shape memory alloy plates 6 and the expansion pad 5 return to their original shape. When a vehicle passes by, the buffer blocks 3 and the expansion pad 5 weaken the vibration. At the same time, the expansion pad 5 has the functions of waterproofing and dustproofing.

[0017] There are several fixing members 2 provided inside both of the two supporting beam plates 1. By providing the fixing members 2, it is convenient to fix the two supporting beam plates 1 on two bridges respectively. The fixing members 2 penetrate through the buffer blocks 3, and the shape memory alloy plate 6 is "wavy".

[0018] Working principle: During use, the two supporting beam plates 1 are respectively fixed on two bridges through the fixing members 2. When the beam body undergoes tensile deformation due to environmental factors such as temperature, the shape memory alloy plate 6 and the expansion pad 5 deform and elongate. When the displacement deformation disappears, the shape memory alloy plate 6 and the expansion pad 5 recover their deformation. When a vehicle passes by, the buffer blocks 3 and the expansion pad 5 weaken the vibration. At the same time, the expansion pad 5 has the functions of waterproofing and dustproofing.

[0019] The above has described the embodiments of the present utility model in detail with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the relevant technical field, various changes can be made without departing from the gist of the present utility model.

Claims

1. An end form device for the expansion joint of the track bed of the elevated bridge crosstie support, comprising a support beam slab (1), characterized in that, There are two support beam plates (1). Buffer blocks (3) are arranged inside both of the two support beam plates (1). Docking beams (4) are fixedly connected to the upper ends of the two support beam plates (1). A telescopic pad (5) is arranged between the two docking beams (4). A number of shape memory alloy plates (6) are arranged between the two support beam plates (1).

2. The end formwork device for the expansion joint of the track bed of the elevated bridge crosstie support as described in claim 1, characterized in that: A number of fixing members (2) are arranged inside both of the two support beam plates (1), and the fixing members (2) penetrate through the buffer blocks (3).

3. The end formwork device for the expansion joint of the track bed of the elevated bridge crosstie support as claimed in claim 1, characterized in that: The shape memory alloy plates (6) are "wavy".

Images