Longitudinal crack stress absorbing band structure for highway pavement

Abstract

This utility model discloses a stress-absorbing strip structure for longitudinal cracks in highway pavement. It includes a stress-absorbing strip positioned above the longitudinal crack. A filler layer is disposed within the cavity of the longitudinal crack. Below the stress-absorbing strip, a slot and a leveling opening are provided in the pavement. A mesh strip is provided within both the leveling opening and the slot. This utility model uses a structural adhesive layer to fix the mesh strip to the cavity of the slot. Then, an adhesive layer is used to lay and fix the stress-absorbing strip and the mesh strip together. Next, U-shaped anchors are used to anchor the edge of the stress-absorbing strip to the pavement. This achieves the goal of placing a mesh strip between the filler and the stress strip in the longitudinal crack, stabilizing the connection between the filler and the stress strip, and dispersing stress to further reduce crack formation. Simultaneously, U-shaped anchors securely connect the edge of the stress strip to the pavement, thereby improving the stability of the stress strip during installation.

Description

Technical Field

[0001] This utility model belongs to the field of road surface crack treatment technology, and in particular relates to the stress absorption zone structure for longitudinal cracks in highway pavement. Background Technology

[0002] Longitudinal cracks in highway pavement are a common road defect, and their causes are complex and varied, mainly including the following categories: Insufficient or uneven compaction of the subgrade: If the compaction of the fill soil is not up to standard during construction, especially if the compaction of the slope area is insufficient, the soil at the edge is prone to loosening and settling under traffic loads and rainwater erosion, leading to longitudinal cracks in the pavement. For example, if drainage is not smooth on both sides of the embankment in low-lying areas, rainwater intrusion will increase the lateral difference in the bearing capacity of the foundation, causing uneven settlement and cracks. Differential settlement between new and old subgrades: When an old road is widened and reconstructed, the strength and consolidation degree of the new and old subgrades are different, and longitudinal cracks are easily generated at the joint due to deformation differences. The pavement shows longitudinal cracks, transverse cracks and local subsidence, and the driving experience is obviously bumpy.

[0003] Stress-absorbing strips are laid at the junction of cracked and old pavement to form a modulus transition zone, absorbing and reducing stress and preventing cracks caused by structural deformation differences. When the stress strip is laid directly on top of the infill pavement, the contact surface may experience hollowing or curling due to insufficient adhesion, affecting the effectiveness of the stress strip. Therefore, a stress-absorbing strip structure for longitudinal cracks in highway pavement is needed. A mesh strip can be set between the longitudinal crack filler and the stress strip. The mesh strip stabilizes the connection between the filler and the stress strip and can disperse stress, further reducing the occurrence of cracks. At the same time, U-shaped nails are used to firmly connect the edge of the stress strip to the pavement, thereby improving the stability of the stress strip during installation. Utility Model Content

[0004] The purpose of this invention is to provide a stress-absorbing strip structure for longitudinal cracks in highway pavement. A mesh strip is set between the filler for longitudinal cracks and the stress strip. The mesh strip stabilizes the connection between the filler and the stress strip and can disperse stress, further reducing the generation of cracks. At the same time, U-shaped nails are used to firmly connect the edge of the stress strip to the pavement, thereby improving the stability of the stress strip during installation, thus solving the technical problems mentioned in the background art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a stress absorption strip structure for longitudinal cracks in highway pavement, comprising a stress absorption strip disposed above the longitudinal crack; a filler layer is disposed in the inner cavity of the longitudinal crack; a slot and a leveling opening are disposed below the stress absorption strip in the pavement; a mesh strip is disposed in the inner cavity of the leveling opening and the slot; a structural adhesive layer is disposed between the mesh strip and the inner wall of the slot; an adhesive layer is applied between the top of the mesh strip and the stress absorption strip; a bevel is formed on the inner wall of the leveling opening; an anchor bolt hole is disposed on the outer side of the bevel in the pavement; a U-shaped anchor bolt is disposed in the inner cavity of the anchor bolt hole; and an anchoring adhesive layer is disposed between the U-shaped anchor bolt and the inner wall of the anchor bolt hole.

[0006] Preferably, the slot has a wedge-shaped block inserted into its inner cavity.

[0007] Preferably, the surface of the U-shaped anchor rod is integrally formed with a raised ring.

[0008] Preferably, the filler layer comprises a crushed stone seal layer, a medium-grained asphalt layer, and an asphalt concrete layer laid from bottom to top on the inner wall of the longitudinal crack.

[0009] Preferably, an anchor is provided through the top of the mesh strip, and the bottom end of the anchor penetrates the mesh strip and extends into the road surface layer.

[0010] The beneficial effects of this utility model are:

[0011] This invention uses a structural adhesive layer to fix the mesh strip to the inner cavity of the slot, then uses an adhesive layer to lay and fix the stress-absorbing strip and the mesh strip together, and then uses U-shaped anchors to anchor the edge of the stress-absorbing strip to the road surface. This achieves the purpose of setting a mesh strip between the filler and the stress strip in the longitudinal crack of the road surface, stabilizing the connection between the filler and the stress strip through the mesh strip, and dispersing stress to further reduce the generation of cracks. At the same time, the U-shaped nails stabilize the connection between the edge of the stress strip and the road surface, thereby improving the stability of the stress strip during installation.

[0012] 2. By setting wedge blocks, this utility model compresses and inserts the connection between the mesh strip and the inner wall of the slot, which improves the stability of the connection between the mesh strip and the inner wall of the slot, thereby improving the flatness of the mesh strip when it is laid at the bottom of the flat cavity.

[0013] 3. By adding a convex ring, this utility model increases the surface area of ​​the U-shaped anchor rod, thereby improving the stability of the bond between the U-shaped anchor rod and the anchoring adhesive layer.

[0014] 4. By setting anchors, this utility model strengthens the connection between the mesh strip and the inner wall of the flat opening, further improving the stability of the mesh strip's position during installation. Attached Figure Description

[0015] in:

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0017] Figure 2 This is one embodiment of the present utility model. Figure 1 A magnified view of point A in the middle;

[0018] Figure 3 This is one embodiment of the present utility model. Figure 1 A magnified view of point B in the middle;

[0019] Figure 4 This is one embodiment of the present utility model. Figure 1 A magnified view of point C in the middle.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Stress-absorbing zone; 2. Longitudinal crack; 3. Filler layer; 31. Crushed stone seal layer; 32. Medium-grained asphalt layer; 33. Asphalt concrete layer; 4. Slot; 5. Smooth opening; 6. Mesh strip; 7. Wedge block; 8. Structural adhesive layer; 9. Bonding adhesive layer; 10. Sloping opening; 11. Anchor bolt hole; 12. U-shaped anchor bolt; 13. Convex ring; 14. Anchoring adhesive layer; 15. Anchor nail. Detailed Implementation

[0022] In the following description, embodiments of the stress-absorbing strip structure for longitudinal cracks in highway pavement according to the present invention will be described with reference to the accompanying drawings. Example 1

[0023] Figure 1-4This invention illustrates a stress-absorbing strip structure for longitudinal cracks in a highway pavement according to an embodiment of the present invention. It includes a stress-absorbing strip 1 positioned above a longitudinal crack 2. A filler layer 3 is disposed within the cavity of the longitudinal crack 2. Below the stress-absorbing strip 1, a slot 4 and a leveling opening 5 are provided in the pavement. A mesh strip 6 is provided within both the leveling opening 5 and the slot 4. A wedge-shaped block 7 is inserted into the cavity of the slot 4. The wedge-shaped block 7 compresses and secures the connection between the mesh strip 6 and the inner wall of the slot 4, improving the stability of the connection between the mesh strip 6 and the inner wall of the slot 4, thereby improving the stability of the connection when the mesh strip 6 is laid at the bottom of the cavity of the leveling opening 5. For flatness, a structural adhesive layer 8 is filled between the inner wall of the mesh strip 6 and the slot 4. An adhesive layer 9 is applied between the top of the mesh strip 6 and the stress-absorbing strip 1. A bevel 10 is opened on the inner wall of the flat opening 5. An anchor bolt hole 11 is set on the outer side of the bevel 10 and is located in the road surface. A U-shaped anchor bolt 12 is set in the inner cavity of the anchor bolt hole 11. A raised ring 13 is integrally formed on the surface of the U-shaped anchor bolt 12. An anchoring adhesive layer 14 is filled between the U-shaped anchor bolt 12 and the inner wall of the anchor bolt hole 11. The setting of the raised ring 13 increases the surface area of ​​the U-shaped anchor bolt 12 and improves the stability of the bond between the U-shaped anchor bolt 12 and the anchoring adhesive layer 14. Example 2

[0024] Figure 1-4 This invention illustrates a stress-absorbing strip structure for longitudinal cracks in a highway pavement according to an embodiment of the present invention. The structure includes a stress-absorbing strip 1 positioned above a longitudinal crack 2. A filler layer 3 is disposed within the cavity of the longitudinal crack 2. Below the stress-absorbing strip 1, a slot 4 and a leveling opening 5 are provided in the pavement. A mesh strip 6 is provided within both the leveling opening 5 and the slot 4. A structural adhesive layer 8 is filled between the mesh strip 6 and the inner wall of the slot 4. An adhesive layer 9 is applied between the top of the mesh strip 6 and the stress-absorbing strip 1. A bevel 10 is formed on the inner wall of the leveling opening 5, and an opening is provided on the outer side of the bevel 10. An anchor bolt hole 11 is installed in the road surface. A U-shaped anchor bolt 12 is installed in the inner cavity of the anchor bolt hole 11. An anchoring adhesive layer 14 is filled between the U-shaped anchor bolt 12 and the inner wall of the anchor bolt hole 11. The filler layer 3 includes a crushed stone seal layer 31, a medium-grained asphalt layer 32 and an asphalt concrete layer 33 laid from bottom to top on the inner wall of the longitudinal crack 2. An anchor nail 15 is installed through the top of the grid strip 6. The bottom end of the anchor nail 15 penetrates the grid strip 6 and extends into the road surface layer. The anchor nail 15 is used to reinforce the connection between the grid strip 6 and the inner wall of the leveling opening 5, which further improves the stability of the grid strip 6 when it is laid.

[0025] Working principle: When using this utility model, the user first creates slots 4, bevels 10, and leveling openings 5 ​​in the longitudinal crack 2 and cleans them. Then, the crushed stone seal layer 31, medium-grained asphalt layer 32, and asphalt concrete layer 33 are laid in the longitudinal crack 2 respectively. Next, the mesh tape 6 is inserted into the cavity of the slot 4. Then, the mesh tape 6 is fixed to the cavity of the slot 4 by the structural adhesive layer 8. Then, the stress-absorbing tape 1 is laid and fixed between the mesh tape 6 and the adhesive layer 9, so that the edge of the stress-absorbing tape 1 fits against the inner wall of the bevel 10. Finally, the anchoring is... The adhesive layer 14 is filled into the cavity of the anchor bolt hole 11. Then, the U-shaped anchor bolt 12 passes through the stress absorption strip 1 and is inserted into the cavity of the anchor bolt hole 11, so that the U-shaped anchor bolt 12 anchors the edge of the stress absorption strip 1 to the road surface. This realizes the setting of a mesh strip between the longitudinal crack filler and the stress strip. The mesh strip stabilizes the connection between the filler and the stress strip, and the mesh strip can disperse stress, further reducing the generation of cracks. At the same time, the U-shaped nail stabilizes the connection between the edge of the stress strip and the road surface, thereby improving the stability of the stress strip during installation.

[0026] In summary, this stress-absorbing strip structure for longitudinal cracks in highway pavement uses a structural adhesive layer 8 to fix the mesh strip 6 into the inner cavity of the slot 4. Then, an adhesive layer 9 is used to lay and fix the stress-absorbing strip 1 and the mesh strip 6 together. Next, U-shaped anchor rods 12 are used to anchor the edge of the stress-absorbing strip 1 to the road surface. This achieves the goal of placing a mesh strip between the longitudinal crack filler and the stress strip, stabilizing the connection between the filler and the stress strip, dispersing stress, and further reducing crack formation. Simultaneously, U-shaped nails securely connect the edge of the stress strip to the road surface, thereby improving the stability of the stress strip during installation.

Claims

1. A stress-absorbing zone structure for longitudinal cracks in highway pavement, characterized in that, The stress-absorbing zone (1) is provided above the longitudinal crack (2): a filler layer (3) is provided in the inner cavity of the longitudinal crack (2), a slot (4) and a leveling opening (5) are provided below the stress-absorbing zone (1) in the road surface, a mesh strip (6) is provided in the inner cavity of the leveling opening (5) and the slot (4), a structural adhesive layer (8) is provided between the mesh strip (6) and the inner wall of the slot (4), an adhesive layer (9) is applied between the top of the mesh strip (6) and the stress-absorbing zone (1), a bevel opening (10) is provided in the inner wall of the leveling opening (5), an anchor bolt hole (11) is provided in the road surface on the outer side of the bevel opening (10), a U-shaped anchor bolt (12) is provided in the inner cavity of the anchor bolt hole (11), and an anchoring adhesive layer (14) is provided between the U-shaped anchor bolt (12) and the inner wall of the anchor bolt hole (11).

2. The stress-absorbing zone structure for longitudinal cracks in highway pavement according to claim 1, characterized in that, The slot (4) is fitted with a wedge block (7).

3. The stress-absorbing zone structure for longitudinal cracks in highway pavement according to claim 2, characterized in that, The surface of the U-shaped anchor rod (12) is integrally formed with a raised ring (13).

4. The stress-absorbing zone structure for longitudinal cracks in highway pavement according to claim 3, characterized in that, The filler layer (3) includes a crushed stone seal layer (31), a medium-grained asphalt layer (32), and an asphalt concrete layer (33) laid from bottom to top on the inner wall of the longitudinal crack (2).

5. The stress-absorbing zone structure for longitudinal cracks in highway pavement according to claim 4, characterized in that, An anchor (15) is provided through the top of the mesh strip (6), and the bottom end of the anchor (15) penetrates the mesh strip (6) and extends into the road surface layer.

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