Aluminum alloy pedestrian overpass expansion joint connecting structure

Abstract

An aluminum alloy pedestrian overpass expansion joint connecting structure is characterized in that an inverted-n-shaped inner cover is arranged at an expansion joint, the horizontal edges of the two sides of the inner cover are fixedly connected with floor profiles on the two sides through inner cover screws, and the vertical edges of the two sides of the inner cover serve as bending parts and are embedded into the expansion joint. The double-layer closed structure of the inner cover and the outer cover is utilized, the movable sealing waterproof effect of the overpass passageway is achieved, accumulated water is prevented from falling to the lower road surface from the expansion joint, and durability, stability and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy overpasses, in particular to an expansion joint connection structure of an aluminum alloy overpass. Background Art

[0002] Aluminum alloy pedestrian overpasses are a type of overpass widely used in urban roads in recent years. Aluminum alloy overpasses are built with aluminum profiles as the basic material. The aluminum profile rods are fixedly connected by buckling, bolting, etc. Due to the advantage of the variable cross-sectional shape of aluminum profiles, the profiles can also be buckled together using the edges of the profiles to minimize the loss of material mechanical properties caused by welding.

[0003] Aluminum alloy overpasses typically span tens of meters. The walkway is constructed from a series of interlocking floor profile beams, with bolts bolted to the staircases at both ends. Due to thermal expansion and contraction in hot and cold environments, expansion joints are required to compensate for this change in length. To prevent rainwater from seeping through the expansion joints and dripping onto the road surface below, a covering structure is installed to prevent water from entering the expansion joints.

[0004] However, the existing aluminum alloy pedestrian bridge aisle expansion joint covering structure still has the following shortcomings: the covering structure is not airtight enough, causing accumulated water to seep into the expansion joint through the gap and drip down to the road surface below; if the covering structure is tightly fitted with the aisle floor profile, the joint will wear out over a long period of time, the gap will also increase, and ultimately the airtightness will still be affected. Summary of the Invention

[0005] In response to the above problems, the utility model provides an aluminum alloy pedestrian overpass expansion joint connection structure, which utilizes a double-layer closed structure of inner and outer cover profiles to achieve a movable sealing and waterproof effect for the overpass aisle, preventing accumulated water from falling from the expansion joint to the road surface below, and is durable, stable and reliable.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An aluminum alloy pedestrian bridge expansion joint connection structure features an inverted "X"-shaped inner cover installed at the expansion joint. The inner cover's horizontal edges are fixed to the floor profiles on either side via inner cover screws, while the inner cover's vertical edges serve as curved portions, embedded in the expansion joint. The inner cover is made of EPDM.

[0008] The flexible inner cover completely seals the expansion joint, preventing accumulated water from leaking down the center of the joint. Instead, it flows out through the ends of the inner cover, completely eliminating any dripping. EPDM, scientifically known as ethylene propylene diene monomer (EPDM), is a copolymer of ethylene, propylene, and a small amount of non-conjugated dienes. It exhibits excellent heat, weather, and aging resistance and is widely used in automotive parts, building waterproofing materials, wire and cable sheathing, heat-resistant hoses, tapes, and automotive seals.

[0009] The inner cover is covered with an outer cover profile, one end of the outer cover profile is fixedly connected to the floor profile on one side through an outer cover screw, and the other end of the outer cover profile is freely slidably connected to the floor profile on the other side.

[0010] The functions of the outer cover are: 1. To protect the inner cover and prevent pedestrians from stepping on the inner cover for a long time, causing wear and damage; 2. To improve the overall appearance of the aluminum alloy aisle. From the outside, the expansion joint is covered by aluminum alloy material, which has better integrity.

[0011] The upper surface of the outer cover profile is provided with anti-skid patterns, which can improve the walking friction of the walkway and prevent pedestrians from falling due to the unevenness of the ground caused by the raised outer cover.

[0012] Advantages of this utility model:

[0013] 1. The utility model is provided with a flexible inner cover and an aluminum alloy outer cover profile. The double-layer closed structure seals the expansion joint of the overpass to prevent accumulated water from dripping downwards. It does not require maintenance during long-term use and has the advantages of durability and weather resistance.

[0014] 2. The utility model does not cause adverse effects on the overall appearance of the overpass, and the overall aluminum alloy metallic feel of the overpass aisle is not damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a structural diagram of the expansion joint in a stretched state;

[0017] Figure 3 This is a structural diagram of the expansion joint in the contracted state;

[0018] The serial numbers in the figure are marked as: 1-external cover profile; 11-external cover screws; 2-inner cover; 21-inner cover screws; 3-floor profile. DETAILED DESCRIPTION Example 1

[0019] An aluminum alloy pedestrian bridge expansion joint connection structure, an inverted "X"-shaped inner cover 2 is provided at the expansion joint, the horizontal edges on both sides of the inner cover 2 are fixedly connected to the floor profiles 3 on both sides by inner cover screws 21, and the vertical edges on both sides of the inner cover 2 serve as curved parts and are embedded in the expansion joint.

[0020] The inner cover 2 is covered with an outer cover profile 1, one end of the outer cover profile 1 is fixedly connected to the floor profile 3 on one side through an outer cover screw 11, and the other end of the outer cover profile 1 is freely slidably connected to the floor profile 3 on the other side.

[0021] The upper surface of the outer cover profile 1 is provided with anti-slip grooves.

[0022] The inner cover 2 is made of EPDM material.

Claims

1. An aluminum alloy pedestrian bridge expansion joint connection structure, characterized in that: An inverted "X"-shaped inner cover (2) is provided at the expansion joint. The horizontal edges on both sides of the inner cover (2) are fixedly connected to the floor profiles (3) on both sides through inner cover screws (21). The vertical edges on both sides of the inner cover (2) serve as curved portions and are embedded in the expansion joint.

2. The aluminum alloy pedestrian bridge expansion joint connection structure according to claim 1, characterized in that: The inner cover (2) is covered with an outer cover profile (1), one end of the outer cover profile (1) is fixedly connected to the floor profile (3) on one side via an outer cover screw (11), and the other end of the outer cover profile (1) is freely slidably connected to the floor profile (3) on the other side.

3. The aluminum alloy pedestrian bridge expansion joint connection structure according to claim 2, characterized in that: Anti-slip grooves are provided on the upper surface of the outer cover profile (1).

4. The aluminum alloy pedestrian bridge expansion joint connection structure according to claim 1, characterized in that: The inner cover (2) is made of EPDM material.

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