A telescopic device for long-span bridge sidewalks and non-motorized vehicle lanes

Abstract

The present invention specifically relates to a telescopic device for a long-span bridge pedestrian walkway and non-motorized vehicle lane, characterized in that the telescopic device includes a support beam, one end of which is connected to the main beam on one side of the expansion joint via a pin hinge structure, providing vertical support for the support beam, and the other end of the support beam is provided with a curved sliding support, and the main beam on the other side of the expansion joint is provided with a sliding groove. A sliding connection is formed between the bottom of the curved sliding support and the sliding groove, and a deformation gap is provided between the bottom of the support beam and the top of the sliding groove to accommodate longitudinal and rotational deformation. The telescopic device for the pedestrian walkway and non-motorized vehicle lane of the present invention is a simply supported structure with an upper cover plate and a lower steel beam. It has reliable force transmission and low construction cost. It not only has the adaptability to large displacement expansion and rotation, but also has anti-slip, dustproof and drainage functions, making it easy to inspect and maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to an expansion and contraction device for a sidewalk and a non-motorized vehicle lane of a long-span bridge. Background Art

[0002] With the rapid development of bridge construction in my country, long-span bridges are emerging one after another. As an important component for the normal operation of bridges, the expansion joints have higher requirements for deformation capacity and durability as the span increases.

[0003] The expansion devices for small-displacement sidewalks and non-motorized vehicle lanes usually use steel expansion devices or simple expansion devices with overlapping steel plates. These two types of expansion devices are difficult to meet the expansion and rotation requirements in long-span bridges.

[0004] Common large-displacement motor vehicle lane expansion devices include comb plate type and modular type. However, the disadvantages of comb plate and modular expansion devices are large gaps in the bridge deck, which are easy to penetrate rainwater, dust, garbage and other debris. In addition, they have complex structures, are expensive, and have high operating and maintenance costs.

[0005] If sidewalks and non-motorized vehicle lanes use the same telescopic devices as motor vehicle lanes, it will affect the safety and comfort of pedestrians and non-motorized vehicle lanes. Summary of the Invention

[0006] In response to the above problems, the present invention proposes a telescopic device for large-span bridge sidewalks and non-motorized vehicle lanes, which has reliable force transmission and low construction cost. It not only has the adaptability to large displacement, telescopic and rotation, but also has anti-slip, dust-proof and drainage functions.

[0007] The present invention is achieved by the following technical solutions:

[0008] A telescopic device for sidewalks and non-motorized vehicle lanes on large-span bridges, characterized in that the telescopic device includes a supporting beam, one end of which is connected to the main beam on one side of the expansion joint through a pin hinge structure to provide vertical support for the supporting beam, and the other end of the supporting beam is provided with a curved sliding support, and the main beam on the other side of the expansion joint is provided with a sliding groove, the bottom of the curved sliding support is provided with an arc-shaped surface to form a sliding connection with the sliding groove, and a deformation gap is provided between the bottom of the supporting beam and the top of the sliding groove to adapt to longitudinal deformation and rotational deformation.

[0009] Furthermore, the pin hinge structure includes a sleeve connected to the support beam, a pin shaft cooperating therewith is provided in the sleeve, the pin shaft is fixed to the base plate through an ear plate, and the base plate is fixed to the main beam on one side of the expansion joint through embedded bolts.

[0010] Furthermore, the sliding groove is a concave groove, and the surface of the concave groove is made of stainless steel plate to meet the sliding requirements of the arc-surface sliding support.

[0011] Furthermore, a guide member is provided at one end of the sliding groove near the expansion joint, and the guide member includes a guide shaft arranged on both sides of the supporting beam and a guide sleeve arranged on the guide shaft. The guide member is in rolling friction contact with the supporting beam, which plays a role of lateral limitation and guidance for the sliding of the supporting beam.

[0012] Furthermore, a cover plate is provided on the top of the supporting beam, and the cover plate is fixed to the supporting beam through a cover plate connector. The cover plate extends above the main beams on both sides of the expansion joint. The cover plate plays the role of transferring crowd load, shielding the sliding groove and waterproofing and dustproofing. An independent sliding surface is provided on the top of the cover plate, and its length meets the requirements of longitudinal deformation and rotational deformation.

[0013] Furthermore, the cover plate connector includes connecting ear plates arranged on the bottom surface of the cover plate and the top plate of the support beam, and fastening bolts connecting the corresponding connecting ear plates, which play the role of connecting the support beam and the cover plate.

[0014] Furthermore, a drainage groove is provided under the sliding surface of the cover plate to discharge the water seeping under the cover plate to the main bridge drainage system, thereby preventing rainwater and dust from entering the sliding groove and causing damage to the sliding surface.

[0015] The advantages of the present invention are: ① simple structure, reliable force transmission, and low construction cost; ② large displacement, extension, and rotation capabilities; ③ the surfaces of sidewalks and non-motorized vehicle lanes are flat and gap-free, and traffic safety and comfort are good; ④ the present invention has anti-slip, dust-proof and drainage functions, and the cover plate is an openable structure, which is convenient for inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the elevation structure of the telescopic device for sidewalks and non-motorized vehicle lanes in the present invention;

[0017] Figure 2 This is a schematic diagram of the planar structure of the telescopic device for sidewalks and non-motorized vehicle lanes in the present invention;

[0018] Figure 3 For the present invention Figure 1 AA cross-section of

[0019] Figure 4 For the present invention Figure 1 BB cross-section diagram;

[0020] Figure 5 For the present invention Figure 1 CC cross-section diagram;

[0021] Figure 6 For the present invention Figure 1 DD profile;

[0022] Figure 7 This is a detailed diagram of the pin hinge structure of the present invention;

[0023] Figure 8 for Figure 7 Side view of

[0024] Figure 9 for Figure 7 A top view of

[0025] Figure 10 Detailed diagram of the arc-surface sliding support in the present invention;

[0026] Figure 11 for Figure 10 Side view of

[0027] Figure 12 for Figure 10 Top view of .

[0028] In the drawings, like parts are given like reference numerals, but the drawings are not necessarily drawn to scale. DETAILED DESCRIPTION

[0029] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0030] like Figures 1-8 The marks in the figure are: pin hinge 1, arc surface sliding support 2, supporting beam 3, sliding groove 4, guide 5, cover plate 6, cover plate connector 7, drainage trough 8, main beam 9, stiffener 10, embedded bolt 11, bottom plate 12, ear plate 13, pin shaft 14, sleeve 15, stainless steel surface 16, bolt 17.

[0031] like Figures 1 and 2 As shown, the support beam 3 is a steel beam, formed into a simply supported structure using a pin hinge 1 and a curved sliding support 2. A deformation gap is provided between the bottom of the support beam 3 and the top of the sliding groove 4. The guide 5 serves as a lateral limiter and guide for the sliding of the support beam 3. A cover plate 6 is mounted on top of the support beam 3 and secured to the support beam 3 via a cover plate connector 7. The cover plate 6 is made of a material with good corrosion resistance, such as embossed stainless steel or aluminum alloy.

[0032] B1 is the structural length of the fixed end of support beam 3; b is the width of the expansion joint; B2 is the overlap length between support beam 3 and the main beam, and B2's length must meet the main bridge's contraction requirements; B3 is the sliding trough extension clearance, and B3 must meet the main bridge's extension requirements; L2 is the extension range of the cover plate structure, and L2's length must meet the main bridge's contraction requirements; L3 is the extension range of the cover plate, and L3 must meet the main bridge's extension requirements. B2+B3 is the expansion range of the lower support beam 3, and L2+L3 is the expansion range of the upper cover plate 6. The staggered expansion ranges of the upper and lower layers ensure the integrity of the sidewalk and non-motorized vehicle lane surfaces and the sealing of the sliding trough 4.

[0033] like Figure 3 、 Figures 7-9 As shown, the pin hinge 1 is a telescopic fixed end, providing vertical support for the supporting beam 3. The pin hinge 1 structure includes embedded bolts 11, a base plate 12, an ear plate 13, a pin shaft 14, a sleeve 15, etc.

[0034] like Figure 4 、 Figures 10-12 As shown, the arc-shaped sliding support 2 is fixed to the bottom of the front end of the supporting beam 3, and an arc-shaped surface is provided at the bottom of the support to form a longitudinal sliding surface with the sliding groove 4.

[0035] like Figure 5 As shown, the guide member 5 includes a guide shaft and a guide sleeve. The guide shaft is arranged on both sides of the support beam 3 to play a role of lateral limitation and guidance for the sliding of the support beam 3.

[0036] like Figure 6 As shown, the cover plate connector 7 includes a connecting ear plate and a fastening bolt provided on the bottom surface of the cover plate 6 and the top plate of the support beam 3, which plays the role of fixing the cover plate 6. The fastening bolts can be removed to facilitate the inspection and maintenance of the telescopic device.

[0037] The telescopic device for the sidewalk and non-motorized vehicle lane of a large-span bridge has reliable force transmission and low construction cost. It not only has the adaptability to large displacement, telescopic and rotation, but also has anti-skid, dust-proof and drainage functions.

[0038] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be regarded as limiting the present invention, and the protection scope of the present invention should be defined by the appended claims.

Claims

1. A telescopic device for long-span bridge sidewalks and non-motorized vehicle lanes, characterized in that The telescopic device includes a supporting beam, one end of the supporting beam is connected to the main beam on one side of the expansion joint through a pin hinge structure, providing vertical support for the supporting beam, and an arc-shaped sliding support is provided at the other end of the supporting beam, and the main beam on the other side of the expansion joint is provided with a sliding groove, a sliding connection is formed between the bottom of the arc-shaped sliding support and the sliding groove, and a deformation gap is provided between the bottom of the supporting beam and the top of the sliding groove, which can adapt to longitudinal deformation and rotational deformation; the sliding groove is a concave groove, the surface of the concave groove is made of stainless steel plate, and a guide member is provided in the sliding groove near one end of the expansion joint, and the guide member includes a guide shaft arranged on both sides of the supporting beam and a guide sleeve arranged on the guide shaft. The guide member is in rolling friction contact with the supporting beam, which plays a role of lateral limitation and guidance for the sliding of the supporting beam.

2. The telescopic device according to claim 1, characterized in that The pin hinge structure includes a sleeve connected to the support beam, a pin shaft cooperating therewith is provided in the sleeve, the pin shaft is fixed to the base plate through an ear plate, and the base plate is fixed to the main beam on one side of the expansion joint through embedded bolts.

3. The telescopic device according to claim 1, characterized in that A cover plate is provided on the top of the supporting beam, and the cover plate is fixed to the supporting beam through a cover plate connector. The cover plate extends above the main beams on both sides of the expansion joint, and an independent sliding surface is provided on the top of the cover plate.

4. The telescopic device according to claim 3, characterized in that The cover plate connecting member includes connecting ear plates arranged on the bottom surface of the cover plate and the top plate of the supporting beam, and fastening bolts connecting the corresponding connecting ear plates.

5. The telescopic device according to claim 3, characterized in that A drainage trough is provided under the sliding surface of the cover plate to discharge the water seeping under the cover plate to the main bridge drainage system.

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