A connecting joint mechanism for a modular bridge

Abstract

The utility model relates to a kind of connecting joint mechanisms for modular bridge, including the first connecting end part and the second connecting end part being respectively arranged in the adjacent edge of two bridge decks, connecting joint between the first connecting end part and the second connecting end part, the first connecting end part and the second connecting end part all include fixed base and fixed cover plate;The fixed base is embedded in the edge of bridge deck, its top surface is provided with the lower accommodating groove extending along the width direction of bridge deck, the bottom surface of the fixed cover plate is provided with the upper accommodating groove extending along the width direction of bridge deck, when fixed cover plate covers the top surface of fixed base, the upper accommodating groove and lower accommodating groove jointly form accommodating cavity, accommodating cavity is opened to connecting joint side, and rubber strip side edge is clamped in accommodating cavity and cannot be taken out;The fixed cover plate is detachably fixed with fixed base and bridge deck by its own fixed structure.The utility model can replace vulnerable parts without damaging bridge deck structure.

Description

Technical Field

[0001] This utility model relates to the field of joints in modular bridges, and more particularly to a joint mechanism for modular bridges. Background Technology

[0002] In bridge engineering, expansion joints, as key components connecting beam ends, primarily function to accommodate longitudinal displacements caused by temperature changes, concrete creep, vehicle loads, and earthquakes, while ensuring smooth driving, waterproofing, and structural durability. Traditional expansion joints often employ a combination of shaped steel and rubber sealing strips, such as the GQF-C type and modular expansion joints, relying on the high elasticity of the rubber strips to seal the gaps. However, existing technologies still suffer from the following significant drawbacks:

[0003] Existing expansion joints primarily rely on the elastic deformation of rubber strips to absorb displacement. However, these strips are prone to hardening, cracking, or detachment due to long-term exposure to rain, ultraviolet radiation, and vehicle impacts, leading to leaks and blockages. Replacement requires cleaning the sealing groove and using specialized tools to pry and re-insert the strips, a cumbersome process that disrupts traffic. While some designs propose quick replacement concepts, they still rely on complex traction devices (such as steel cable pulling), failing to fundamentally simplify the installation structure.

[0004] To overcome the above limitations, there is an urgent need for a joint mechanism that can be maintained quickly. Utility Model Content

[0005] To address the problems of easy fatigue damage and difficulty in replacing rubber strips in existing technologies, this utility model proposes a joint mechanism for modular bridges, the technical solution of which is as follows:

[0006] A joint mechanism for modular bridges includes a first connecting end and a second connecting end respectively disposed on the adjacent edges of two bridge decks, with a joint between the first connecting end and the second connecting end, and each of the first connecting end and the second connecting end includes a fixed base and a fixed cover plate.

[0007] The fixed base is embedded in the edge of the bridge deck, and its top surface is provided with a lower receiving groove extending along the width direction of the bridge deck. The bottom surface of the fixed cover plate is provided with an upper receiving groove extending along the width direction of the bridge deck. When the fixed cover plate covers the top surface of the fixed base, the upper receiving groove and the lower receiving groove together form a receiving cavity. The receiving cavity opens towards the connection seam side, and the side of the rubber strip is stuck in the receiving cavity and cannot be removed.

[0008] The fixed cover plate is detachably fixed to the fixed base and the bridge surface through its own fixing structure.

[0009] The accommodating cavity gradually narrows in the direction of opening along the width of the bridge deck, and the cross-section of the side of the rubber strip in the direction of the width of the bridge deck matches the cross-section of the accommodating cavity along the width of the bridge deck.

[0010] The fixed base is a rectangular column structure, and the length direction of the rectangular column is parallel to the width direction of the bridge deck. Several stabilizing steel bars are provided on the fixed base. One end of the stabilizing steel bar is fixedly connected to the bottom surface of the fixed base, and the other end is fixedly connected to the side of the fixed base away from the opposite side of the bridge deck.

[0011] The ends of the stabilizing steel bar at the junction with the fixed base are thickened.

[0012] The fixed cover plate is a rectangular plate structure, and the length direction of the rectangular plate is parallel to the width direction of the bridge deck. The fixed cover plate at the first connecting end extends horizontally to the side of the connecting seam to form a mudguard. The fixed cover plate at the second connecting end is provided with a clearance groove above it to allow the mudguard to move. The mudguard covers the connecting seam and extends to the top surface of the second connecting end.

[0013] The fixing structure includes multiple first-step through holes on the fixing cover plate, and multiple fixing holes corresponding to the first-step through holes are provided on the top surface of the fixing base. An internal thread is provided on the inner wall of the fixing hole near the end face. The fixing cover plate can be fixed on the fixing base by inserting a fixing pin into the corresponding first-step through hole and fixing hole. The end of the fixing pin near the inner end face of the fixing hole is provided with an external thread that matches the internal thread.

[0014] The fixed cover plate extends along the length of the bridge deck from one end away from the joint, forming an extension section. Multiple second-step through holes are provided on the extension section, through which bolts can be screwed into the bridge deck to lock the fixed cover plate.

[0015] A buffer rubber layer is provided on the lower side of the mudguard.

[0016] The beneficial effects of this utility model are as follows: the adhesive strip is fixed by setting a cavity formed by a fixed base and a fixed cover plate; at the same time, the fixed cover plate adopts a detachable connection method, so that when the adhesive strip needs to be replaced, only the fixed cover plate needs to be removed to take out the old adhesive strip and install the new adhesive strip. The operation is simple and quick, which greatly reduces the maintenance difficulty and cost. It realizes the replacement of vulnerable parts without damaging the bridge deck structure, effectively extends the overall service life of the joint, and ensures the convenience of modular bridge construction and maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional view along the width of the bridge deck in an embodiment of the present invention.

[0019] In the above figures: first connecting end 1, second connecting end 2, fixed base 3, fixed cover plate 4, lower receiving groove 5, upper receiving groove 6, receiving cavity 7, rubber strip 8, connecting seam 9, stabilizing steel bar 10, mudguard 11, first stepped through hole 12, second stepped through hole 13, fixing hole 14, fixing pin 15, buffer rubber layer 16, extension section 17, clearance groove 18. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] like Figure 1 As shown, a joint mechanism for modular bridges includes a first connecting end 1 and a second connecting end 2 respectively disposed on the adjacent edges of two bridge decks. A joint 9 is formed between the first connecting end 1 and the second connecting end 2. Both the first connecting end 1 and the second connecting end 2 include a fixed base 3 and a fixed cover plate 4.

[0022] like Figure 1 , Figure 2 As shown, the fixed base 3 is embedded in the edge of the bridge deck, and its top surface is provided with a lower receiving groove 5 extending along the width direction of the bridge deck. The bottom surface of the fixed cover plate 4 is provided with an upper receiving groove 6 extending along the width direction of the bridge deck. When the fixed cover plate 4 covers the top surface of the fixed base 3, the upper receiving groove 6 and the lower receiving groove 5 together form a receiving cavity 7. The receiving cavity 7 opens to the side of the connecting seam 9, and the side of the adhesive strip 8 is stuck in the receiving cavity 7 and cannot be removed.

[0023] like Figure 1 , Figure 2 As shown, the fixed cover plate 4 is detachably fixed to the fixed base 3 and the bridge surface through its own fixing structure.

[0024] like Figure 1 , Figure 2 As shown, preferably, the cross-section of the receiving cavity 7 gradually narrows towards the opening direction along the width of the bridge deck, and the cross-section of the side of the rubber strip 8 in the width direction of the bridge deck matches the cross-section of the receiving cavity 7 along the width of the bridge deck. Through the narrowed cross-sectional shape, the rubber strip 8 can be stuck in the receiving cavity 7 to prevent it from falling out, thereby improving the sealing performance and structural stability and ensuring the reliability of the connection seam 9.

[0025] like Figure 1 , Figure 2As shown, preferably, the fixed base 3 is a rectangular column structure, and the length direction of the rectangular column is parallel to the width direction of the bridge deck. Several stabilizing steel bars 10 are provided on the fixed base 3. One end of each stabilizing steel bar 10 is fixedly connected to the bottom surface of the fixed base 3, and the other end is fixedly connected to the side of the fixed base 3 away from the opposite side of the bridge deck. The steel bars enhance the anchorage force between the fixed base 3 and the bridge deck concrete, preventing the base from loosening or shifting, and improving the shear strength and durability of the overall structure.

[0026] like Figure 1 , Figure 2 As shown, preferably, the ends of the stabilizing steel bar 10 at the junction with the fixed base 3 are thickened. The thickening treatment increases the cross-sectional area of ​​the steel bar at the key stress point, effectively disperses stress concentration, and prevents the steel bar from breaking at the junction due to fatigue or impact, thereby improving the seismic performance and service life of the connection joint 9.

[0027] like Figure 1 , Figure 2 As shown, preferably, the fixed cover plate 4 is a rectangular plate structure, and the length direction of the rectangular plate is parallel to the width direction of the bridge deck. The fixed cover plate 4 at the first connecting end 1 extends horizontally to one side of the connecting seam 9 as a mudguard 11. A clearance groove 18 is provided above the fixed cover plate 4 at the second connecting end 2 to allow space for the movement of the mudguard 11. The mudguard 11 covers the connecting seam 9 and extends above the top surface of the second connecting end 2. The mudguard 11 can prevent large debris from entering the connecting seam 9, and the extended covering design ensures full protection of the connecting seam 9, reducing maintenance requirements.

[0028] like Figure 1 , Figure 2 As shown, preferably, the fixing structure includes multiple first-step through holes 12 opened on the fixing cover plate 4, and multiple fixing holes 14 corresponding to the first-step through holes 12 are provided on the top surface of the fixing base 3. The inner wall of the fixing hole 14 near the end face is provided with an internal thread. By inserting a fixing pin 15 into the corresponding first-step through hole 12 and fixing hole 14, the fixing cover plate 4 can be fixed on the fixing base 3. The outer wall of the fixing pin 15 near the inner end face of the fixing hole 14 is provided with an external thread that matches the internal thread. The stepped through hole structure allows the head of the fixing pin 15 to be embedded in the fixing cover plate 4, keeping the surface flat and avoiding protrusions from interfering with traffic. The threaded connection provides reliable fastening force, facilitates quick installation and disassembly, and is beneficial for daily inspection or replacement of the rubber strip 8, improving construction efficiency and maintainability. In addition, the fixing pin 15 has a smooth surface without threads at the interface between the fixing cover plate 4 and the fixing base 3, which enhances the radial strength of the fixing pin 15.

[0029] like Figure 1 , Figure 2As shown, preferably, the fixed cover plate 4 extends along the length of the bridge deck from one end away from the joint, forming an extension section. The extension section is provided with a plurality of second-step through holes 13. Bolts can be screwed into the bridge deck through the second-step through holes 13 to lock the fixed cover plate 4. The extension section increases the contact area between the fixed cover plate 4 and the bridge deck. The second-step through holes 13 and the bolts provide additional fixing points to prevent the cover plate from tilting or sliding under vehicle load, thereby enhancing the overall stability and ensuring the flatness and safety of the joint 9.

[0030] like Figure 1 , Figure 2 As shown, preferably, a buffer rubber layer 16 is provided on the lower side of the mudguard 11. The effect of this design is that the buffer rubber layer 16 can absorb the impact energy when the vehicle passes by, reduce noise and vibration, and at the same time protect the mudguard 11 and the bridge surface from wear, thus extending the service life of the components.

[0031] The method of using this utility model embodiment is as follows;

[0032] Pre-processing involves reserving installation positions at the edge of the modular bridge deck to ensure that the corresponding areas of the first connecting end 1 and the second connecting end 2 are flat.

[0033] Install the fixed base 3 and embed it into the edge of the bridge deck. Anchor the fixed base 3 to the bridge deck concrete by the sturdy steel bar 10 to ensure that the fixed base 3 is firm and the lower receiving groove 5 faces the connection joint 9.

[0034] Place the adhesive strip 8 and insert the side of the adhesive strip 8 into the lower receiving groove 5 of the fixed base 3. The adhesive strip 8 should be laid continuously along the width of the bridge deck.

[0035] Install the fixing cover plate 4 and cover the fixing base 3 so that the upper receiving groove 6 and the lower receiving groove 5 are aligned to form the receiving cavity 7, and the adhesive strip 8 is tightly locked in place.

[0036] To fix the cover plate 4, firstly, insert the fixing pin 15 into the first stepped through hole 12 and the fixing hole 14 of the fixing base 3, and tighten the threaded part to fix the cover plate 4 to the fixing base 3; then, on the extension section of the cover plate 4, screw bolts into the bridge deck through the second stepped through hole 13 to further lock the cover plate 4.

[0037] Check and adjust to ensure that the mudguard 11 covers the joint 9 and that the buffer rubber layer 16 makes good contact. Perform a load test to check the sealing and flatness.

[0038] Maintenance involves regularly inspecting the adhesive strip 8 and the fixing structure. If necessary, the fixing cover plate 4 can be removed to replace the adhesive strip 8 or fastening components. This method simplifies the splicing process of modular bridges, improves construction efficiency, and ensures the durability and functionality of the connection joint 9. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A joint mechanism for modular bridges, comprising a first connecting end (1) and a second connecting end (2) respectively disposed at adjacent edges of two bridge decks, wherein a joint (9) is formed between the first connecting end (1) and the second connecting end (2), characterized in that: Both the first connecting end (1) and the second connecting end (2) include a fixed base (3) and a fixed cover plate (4); The fixed base (3) is embedded in the edge of the bridge deck, and its top surface is provided with a lower receiving groove (5) extending along the width direction of the bridge deck. The bottom surface of the fixed cover plate (4) is provided with an upper receiving groove (6) extending along the width direction of the bridge deck. When the fixed cover plate (4) covers the top surface of the fixed base (3), the upper receiving groove (6) and the lower receiving groove (5) together form a receiving cavity (7). The receiving cavity (7) opens to the side of the connecting seam (9), and the side of the rubber strip (8) is stuck in the receiving cavity (7) and cannot be removed. The fixed cover plate (4) is detachably fixed to the fixed base (3) and the bridge surface through its own fixing structure.

2. The joint mechanism for modular bridges according to claim 1, characterized in that: The accommodating cavity (7) gradually narrows in the direction of opening along the width of the bridge deck, and the cross section of the side of the rubber strip (8) in the direction of the width of the bridge deck matches the cross section of the accommodating cavity (7) along the width of the bridge deck.

3. A joint mechanism for modular bridges according to claim 1, characterized in that: The fixed base (3) is a rectangular column structure, and the length direction of the rectangular column is parallel to the width direction of the bridge deck. Several stabilizing steel bars (10) are provided on the fixed base (3). One end of the stabilizing steel bar (10) is fixedly connected to the bottom surface of the fixed base (3), and the other end is fixedly connected to the side of the fixed base (3) away from the opposite side of the bridge deck.

4. A joint mechanism for modular bridges according to claim 3, characterized in that: The ends of the stabilizing steel bar (10) at the junction with the fixed base (3) are thickened.

5. A joint mechanism for modular bridges according to claim 1, characterized in that: The fixed cover plate (4) is a rectangular plate structure, and the length direction of the rectangular plate is parallel to the width direction of the bridge deck. The fixed cover plate (4) of the first connecting end (1) extends horizontally to the side of the connecting seam (9) to form a mudguard (11). A clearance groove (18) is provided above the fixed cover plate (4) of the second connecting end (2) to allow the mudguard (11) to move. The mudguard (11) covers the connecting seam (9) and extends to the top surface of the second connecting end (2).

6. A joint mechanism for modular bridges according to claim 1, characterized in that: The fixing structure includes multiple first-step through holes (12) opened on the fixing cover plate (4). Multiple fixing holes (14) corresponding to the first-step through holes (12) are provided on the top surface of the fixing base (3). An internal thread is provided on the inner wall of the fixing hole (14) near the end face. The fixing cover plate (4) can be fixed on the fixing base (3) by inserting a fixing pin (15) into the corresponding first-step through hole (12) and fixing hole (14). The fixing pin (15) is provided with an external thread matching the internal thread at the end near the inner end face of the fixing hole (14).

7. A joint mechanism for modular bridges according to claim 6, characterized in that: The fixed cover plate (4) extends along the length of the bridge deck from one end away from the joint to form an extension section. Multiple second-step through holes (13) are provided on the extension section. Bolts can be screwed into the bridge deck through the second-step through holes (13) to lock the fixed cover plate (4).

8. A joint mechanism for modular bridges according to claim 5, characterized in that: A buffer rubber layer (16) is provided on the lower side of the mudguard (11).

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