High-strength connecting structure for new pavement and old pavement

Abstract

The utility model relates to the technical field of road construction, in particular to a new and old pavement high-strength connecting structure which comprises geogrids laid between an old pavement layer and a new pavement layer, the geogrids are fixed through fixing nails, and a supporting assembly is arranged between every two geogrids which are adjacent up and down. The supporting assembly comprises supporting plates used for supporting the geogrid in an attached mode, the supporting plates located on the lower portion are fixed through positioning nails, the supporting plates located on the upper portion are fixed through fixing nails, and a height-adjustable telescopic rod is arranged between the upper supporting plate and the lower supporting plate. Compared with a lap joint structure in the prior art, the connecting structure has the advantages that the height of the supporting assembly can be adaptively adjusted, the connecting structure is suitable for various pavement layers with different thicknesses, the production cost is reduced, the application range is expanded, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of road construction technology, and in particular to a high-strength connection structure for new and old road surfaces. Background Technology

[0002] During road construction, there will be situations where new road surfaces are connected to old road surfaces. In order to ensure a stable connection at the joint, geogrids will be installed at the joint.

[0003] Related technologies, such as the Chinese utility model patent with publication number CN218373110U, disclose a new and old road surface overlap structure, including an old road surface and a new road surface overlapped on the old road surface. The connection between the old and new road surfaces is set in a stepped shape. The old road surface consists of an old subbase, an old lower base, an old upper base, and an old surface layer from bottom to top. The new road surface consists of a new subbase, a new lower base, a new upper base, and a new surface layer from bottom to top. A geogrid is provided at the connection between the old upper base and the new upper base. One side of the geogrid covers the old upper base and the other side covers the new upper base. A support component for supporting the geogrid is also provided on the old lower base. This structure has the effect of hindering the vertical displacement of the roadbed and improving the crack resistance of the new and old road surface overlap structure.

[0004] However, the support components in the above structure have a fixed height and can only be used for one type of road surface layer thickness. Since the thickness of each road construction layer varies according to design requirements, it cannot be used for multiple road layer thicknesses, which limits its application. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the present invention provides a high-strength connection structure for new and old road surfaces.

[0006] The present invention provides a high-strength connection structure for new and old road surfaces, which adopts the following technical solution:

[0007] A high-strength connection structure for new and old road surfaces includes a geogrid laid between the old road surface layer and the new road surface layer. The geogrid is fixed by fixing nails. A support assembly is provided between two adjacent geogrids. The support assembly includes a support plate for fitting and supporting the geogrid. The lower support plate is fixed by positioning nails, and the upper support plate is fixed by fixing nails. An adjustable telescopic rod is provided between the upper and lower support plates.

[0008] By adopting the above technical solution, the height of the support components of this connection structure can be adjusted to adapt to different road layers of varying thicknesses, thus reducing production costs, expanding the scope of application, and improving construction efficiency.

[0009] Optionally, the telescopic rod includes an outer cylinder and an inner rod that is slidably sleeved within the outer cylinder. The outer cylinder has a threaded set screw for securing the inner rod.

[0010] By adopting the above technical solution, the inner rod is moved out of the outer cylinder by a corresponding length, and then the inner rod is fixed by a set screw, so that the length of the telescopic rod can be changed. Thus, the height of the support component can be adjusted according to the thickness of different road layers. This structure is quick and convenient to adjust.

[0011] Optionally, an installation cylinder is provided on the side wall of the support plate near the telescopic rod, and the telescopic rod is inserted into the installation cylinder.

[0012] By adopting the above technical solution, the installation cylinder has the function of positioning the telescopic pole, and the telescopic pole can be installed quickly through the installation cylinder.

[0013] Optionally, the mounting cylinder and the support plate are fixed together by connecting screws.

[0014] By adopting the above technical solution, it is convenient to assemble and fix the installation cylinder and the support plate.

[0015] Optionally, a rib is vertically fixed to the outer wall of the mounting cylinder, and the rib abuts against the support plate.

[0016] By adopting the above technical solution, the rib plate enhances the strength and stability between the support plate and the telescopic rod.

[0017] Optionally, a perforated hole is provided in the middle of the rib.

[0018] By adopting the above technical solution, the weight and production cost of the rib plate are reduced by setting the perforated holes.

[0019] Optionally, anchors are horizontally wedged into the sidewall of the old pavement layer adjacent to the new pavement layer, and vertically arranged baffles are provided on the anchors, with the baffles located inside the new pavement layer.

[0020] By adopting the above technical solution, the anchors and baffles are used together to improve the connection strength between the new pavement layer and the old pavement layer.

[0021] Optionally, the anchor is an anchor bolt, which passes through the baffle.

[0022] By adopting the above technical solution, the installation of the baffle is facilitated.

[0023] In summary, this utility model has at least one of the following beneficial technical effects:

[0024] Compared to the overlapping structure in the existing technology, the height of the support components of this connection structure can be adjusted to adapt to various road layers of different thicknesses, thereby reducing production costs, expanding the scope of application, and improving construction efficiency.

[0025] The inner rod is moved out of the outer cylinder by a certain length, and then the inner rod is fixed by the set screw. This allows the length of the telescopic rod to be changed, and the height of the support assembly can be adjusted according to the thickness of different road layers. This structure is quick and easy to adjust.

[0026] The anchors, used in conjunction with the baffles, enhance the connection strength between the new and old pavement layers. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the installation of the high-strength connection structure between the old and new road surfaces according to an embodiment of this utility model.

[0028] Figure 2 This is a schematic diagram of the high-strength connection structure between the old and new road surfaces according to an embodiment of this utility model.

[0029] Explanation of reference numerals in the attached drawings: 1. Old pavement layer; 2. New pavement layer; 3. Geogrid; 4. Fixing nail; 5. Support assembly; 50. Support plate; 51. Telescopic rod; 510. Outer cylinder; 511. Inner rod; 512. Top screw; 52. Mounting cylinder; 53. Connecting screw; 54. Rib plate; 540. Hole; 55. Positioning nail; 6. Anchor; 7. Baffle. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 2 The present invention will be described in further detail below.

[0031] This utility model discloses a high-strength connection structure for new and old road surfaces. (Refer to...) Figure 1 The old road surface layer 1 and the new road surface layer 2 are connected in a stepped manner. A high-strength connection structure between the old and new road surfaces includes a geogrid 3 laid between the old road surface layer 1 and the new road surface layer 2. The geogrid 3 adopts an integral perforated stretching three-dimensional geogrid with an equilateral triangle mesh shape.

[0032] Reference Figure 1 and Figure 2 The geogrid 3 is fixed to the old pavement layer 1 and the new pavement layer 2 respectively by fixing nails 4. A support assembly 5 is installed between two adjacent geogrids 3. The support assembly 5 includes a support plate 50 for abutting and supporting the geogrid 3. The support plate 50 is long and narrow. A telescopic rod 51 is vertically arranged between the two support plates 50. The telescopic rod 51 includes an outer cylinder part 510 and an inner rod part 511. The inner rod part 511 is slidably inserted into the outer cylinder part 510. A set screw 512 is also threaded on the outer wall of the outer cylinder part 510. The set screw 512 is used to abut and fix with the inner rod part 511.

[0033] Reference Figure 1 and Figure 2A mounting cylinder 52 is vertically installed on the side wall of the support plate 50 near the telescopic rod 51. The mounting cylinder 52 is fixed to the support plate 50 by connecting screws 53. The outer cylinder part 510 is inserted into the upper mounting cylinder 52, and the inner rod part 511 is inserted into the lower mounting cylinder 52. A right-angled triangular rib plate 54 is also vertically fixed to the outer wall of the mounting cylinder 52. One right-angled side of the rib plate 54 is in contact with the outer wall of the mounting cylinder 52, and the other right-angled side of the rib plate 54 abuts against the support plate 50. In order to reduce the weight of the rib plate 54, a right-angled triangular hollow hole 540 is opened in the middle of the rib plate 54.

[0034] Reference Figure 1 The lower support plate 50 is fixed by positioning nails 55, and the upper support plate 50 is fixed by fixing nails 4. In order to improve the connection effect between the old pavement layer 1 and the new pavement layer 2, anchors 6 are horizontally wedged into the vertical wall of the old pavement layer 1 adjacent to the new pavement layer 2. In this embodiment, the anchors 6 are anchor nails, and baffles 7 are provided on the anchor nails. The baffles 7 are long strips and are vertically arranged in the new pavement layer 2.

[0035] The implementation principle of a high-strength connection structure between old and new road surfaces according to this utility model embodiment is as follows: First, the old road surface layer 1 is constructed in a stepped shape, then a geogrid 3 is laid and fixed with fixing nails 4. A support component 5 is installed, and the height of the telescopic rod 51 is adjusted so that the distance between the upper and lower support plates 50 matches the height of the road surface layer. Anchors 6 and baffles 7 are constructed simultaneously. Then, the new road surface layer 2 is laid, and other road surface layers are constructed sequentially according to the above steps. Compared with the overlapping structure in the prior art, the height of the support component 5 can be adjusted for adaptability, making it suitable for road surface layers of various thicknesses, reducing production costs, expanding the scope of application, and improving construction efficiency.

[0036] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A high-strength connection structure for new and old road surfaces, characterized in that: The system includes a geogrid (3) laid between the old road surface layer (1) and the new road surface layer (2). The geogrid (3) is fixed by fixing nails (4). A support assembly (5) is provided between two adjacent geogrids (3). The support assembly (5) includes a support plate (50) for fitting and supporting the geogrid (3). The lower support plate (50) is fixed by positioning nails (55), and the upper support plate (50) is fixed by fixing nails (4). An adjustable telescopic rod (51) is provided between the upper and lower support plates (50).

2. The high-strength connection structure between new and old road surfaces according to claim 1, characterized in that: The telescopic rod (51) includes an outer cylinder (510) and an inner rod (511) that is slidably sleeved inside the outer cylinder (510). A set screw (512) for abutting and fixing the inner rod (511) is threaded on the side wall of the outer cylinder (510).

3. The high-strength connection structure between new and old road surfaces according to claim 1 or 2, characterized in that: An installation cylinder (52) is provided on the side wall of the support plate (50) near the telescopic rod (51), and the telescopic rod (51) is inserted into the installation cylinder (52).

4. The high-strength connection structure between new and old road surfaces according to claim 3, characterized in that: The mounting cylinder (52) is fixed to the support plate (50) by connecting screws (53).

5. The high-strength connection structure between new and old road surfaces according to claim 3, characterized in that: Ribs (54) are vertically fixed to the outer wall of the mounting cylinder (52), and the ribs (54) abut against the support plate (50).

6. The high-strength connection structure between new and old road surfaces according to claim 5, characterized in that: A perforated hole (540) is provided in the middle of the rib plate (54).

7. The high-strength connection structure between new and old road surfaces according to claim 1 or 2, characterized in that: An anchor (6) is horizontally wedged into the side wall of the old pavement layer (1) adjacent to the new pavement layer (2). A vertically arranged baffle (7) is provided on the anchor (6) and the baffle (7) is located inside the new pavement layer (2).

8. The high-strength connection structure between new and old road surfaces according to claim 7, characterized in that: The anchor (6) is an anchoring nail, which is inserted through the baffle (7).

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