Flexible base asphalt pavement splicing widening structure

Abstract

The utility model relates to the technical field of asphalt pavement splicing and widening, and discloses a flexible base asphalt pavement splicing and widening structure which comprises an old roadbed, an old filling layer and an old asphalt pavement which are sequentially laid from bottom to top, a new roadbed is laid on one side of the old roadbed, and a plurality of connecting units are arranged between the old roadbed and the new roadbed. A new filling layer is laid on the upper surface of the new roadbed, a new asphalt pavement is laid on the upper surface of the new filling layer, the connecting unit comprises two plug bushes, the two plug bushes are inserted into the old roadbed and the new roadbed respectively, and a fixing steel bar is inserted between the two plug bushes; according to the utility model, the old roadbed and the new roadbed are mutually limited by adopting the fixed steel bars and the two plug bushes, so that the widened base layer and the original base layer of the road are tensioned and connected, the phenomenon that an asphalt layer cracks due to the separation of the old roadbed and the new roadbed is avoided, and the practicability of the pavement is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt pavement splicing and widening, in particular to a flexible base asphalt pavement splicing and widening structure. Background Art

[0002] With the development of society, people's travel methods have changed a lot. Car travel has become popular, which has brought greater pressure to traditional old roads. The width of the road cannot adapt to the growing traffic pressure, and it costs too much money to renovate the road. The old road is not unusable. Therefore, widening and expanding the old road has become the main way to alleviate traffic pressure today.

[0003] However, when widening old roads, there is a mismatch in the modulus of the new and old roadbeds and pavements, and improper overlap of the new and old roadbeds and pavements. As a result, cracks in the base layer often extend to the asphalt layer and develop into reflective cracks until they penetrate the asphalt top layer.

[0004] For this purpose, a flexible base asphalt pavement splicing and widening structure is proposed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a flexible base asphalt pavement splicing and widening structure to improve the strength of the asphalt pavement splicing and widening and avoid cracks.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flexible base asphalt pavement splicing and widening structure, comprising an old roadbed, an old filling layer and an old asphalt pavement laid in sequence from bottom to top, a new roadbed is laid on one side of the old roadbed, a plurality of connecting units are arranged between the old roadbed and the new roadbed, a new filling layer is laid on the upper surface of the new roadbed, a new asphalt pavement is laid on the upper surface of the new filling layer, the connecting unit comprises two sockets, the two sockets are respectively inserted into the old roadbed and the new roadbed, and a fixed steel bar is inserted between the two sockets.

[0007] Preferably, the connecting unit further comprises a plug-in rod, which is fixedly connected to the upper surface of the plug-in sleeve.

[0008] Preferably, the connection unit also includes a connection sleeve, which is fixedly connected to the upper outer wall of the plug-in rod, and a connecting steel bar is inserted between the two connection sleeves, and the two ends of the connecting steel bar are respectively inserted into the new filling layer and the old filling layer.

[0009] Preferably, an asphalt bonding layer is laid between the old filling layer and the new filling layer, and the asphalt bonding layer is laid outside the plug-in rod, the connecting sleeve and the connecting steel bar.

[0010] Preferably, new asphalt pavement is laid over the asphalt binder layer and the old fill layer.

[0011] Preferably, the lower end of the socket inserted into the old roadbed is a conical structure.

[0012] Preferably, one end of the fixed steel bar and the connecting steel bar are both tapered structures, and the other end of the fixed steel bar is fixedly connected with a stopper.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model adopts fixed steel bars and two insert sleeves to restrict each other between the old roadbed and the new roadbed, thereby tightening and connecting the widened base and the original base of the road, avoiding the separation of the old roadbed and the new roadbed and causing cracks in the asphalt layer, thereby improving the practicality of the road surface.

[0015] 2. The utility model can further improve the connectivity between the new pavement and the old pavement, increase the connection strength, and reduce the possibility of cracks by inserting the restricted connecting steel bars between the old filling layer and the new filling layer.

[0016] 3. The utility model lays an asphalt bonding layer on the connection unit, which can wrap and restrict the connection unit, thereby improving the connectivity between the new road surface and the old road surface, and improving the connectivity between the new asphalt road surface and the old asphalt road surface, thereby reducing the possibility of cracks in the road.

[0017] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the position structure of the connection unit of the utility model;

[0020] Figure 3 It is a schematic diagram of the connection structure of the connection unit of the utility model, the old roadbed and the old filling layer;

[0021] Figure 4 It is a detailed structural diagram of the connection unit of the utility model.

[0022] In the figure: 1. old roadbed; 2. old filling layer; 3. old asphalt pavement; 4. new roadbed; 5. new filling layer; 6. new asphalt pavement; 7. asphalt bonding layer; 8. connecting unit; 81. plug-in sleeve; 82. fixed steel bar; 83. plug-in rod; 84. connecting sleeve; 85. connecting steel bar; 9. block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this technical field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4 The flexible base asphalt pavement splicing and widening structure of this embodiment includes an old roadbed 1, an old filling layer 2 and an old asphalt pavement 3 which are laid in sequence from bottom to top, a new roadbed 4 is laid on one side of the old roadbed 1, a plurality of connecting units 8 are arranged between the old roadbed 1 and the new roadbed 4, a new filling layer 5 is laid on the upper surface of the new roadbed 4, a new asphalt pavement 6 is laid on the upper surface of the new filling layer 5, the connecting unit 8 includes two sockets 81, the two sockets 81 are respectively inserted into the old roadbed 1 and the new roadbed 4, and a fixed steel bar 82 is inserted between the two sockets 81.

[0025] like Figure 1-4 As shown, the asphalt pavement splicing and widening structure in the utility model is similar to the existing asphalt pavement splicing and widening structure. The main improvement of the utility model is to improve the strength of the asphalt pavement splicing and widening to avoid cracks. When the asphalt pavement needs to be spliced ​​and widened, the utility model first digs the old asphalt pavement 3, the old filling layer 2 and the old roadbed 1 from top to bottom in a stepped manner to form a connection step, and then inserts a plurality of plug sleeves 81 from the upper surface of the old roadbed 1 into the interior thereof, and then passes the fixed steel bar 82 through another plug sleeve 81 and then from the old roadbed 1. The side wall of the roadbed 1 is inserted into the interior thereof, and the fixed steel bar 82 is plugged into the socket 81 in the old roadbed 1. At this time, the new roadbed 4 can be laid, and the new roadbed 4 buries the fixed steel bar 82 and another socket 81 therein, and then the new filling layer 5 and the new asphalt pavement 6 are laid in sequence. The fixed steel bar 82 can be used to restrict the two sockets 81 to each other, so that the old roadbed 1 and the new roadbed 4 are fully tightened and connected, avoiding the separation of the old roadbed 1 and the new roadbed 4 and causing cracks in the asphalt layer, thereby improving the practicability of the pavement.

[0026] like Figure 3 , 4 As shown, the connection unit 8 also includes a plug rod 83, which is fixedly connected to the upper surface of the socket 81; with the support of the plug rod 83, the socket 81 can be easily inserted into the old roadbed 1, and the socket 81 can be inserted deeper to improve the connection strength.

[0027] like Figure 2-4As shown, the connection unit 8 also includes a connection sleeve 84, which is fixedly connected to the outer wall of the upper end of the plug-in rod 83, and a connecting steel bar 85 is inserted between the two connection sleeves 84. The two ends of the connecting steel bar 85 are respectively inserted into the new filling layer 5 and the old filling layer 2; after the two plug-in sleeves 81 are respectively inserted into the old roadbed 1 and the new roadbed 4, the connecting steel bar 85 is passed through the two connection sleeves 84, and one end of the connecting steel bar 85 is inserted from one side of the old filling layer 2. At this time, the new filling layer 5 is laid, so that the new filling layer 5 buries the other end of the connecting steel bar 85. Through the connection of the connecting steel bar 85, the connectivity between the new road surface and the old road surface is further improved, the connection strength is improved, and the possibility of cracks in the road is reduced.

[0028] like Figure 1-3 As shown, an asphalt bonding layer 7 is laid between the old filling layer 2 and the new filling layer 5, and the asphalt bonding layer 7 is laid outside the plug-in rod 83, the connecting sleeve 84 and the connecting steel bar 85; when filling the new filling layer 5, a certain gap is left between the new filling layer 5 and the old filling layer 2, and the asphalt bonding layer 7 is laid in the gap. The connecting steel bar 85 can be wrapped by the asphalt bonding layer 7, thereby improving the connection strength between the connecting steel bar 85 to the new filling layer 5 and the old filling layer 2, and improving the connectivity between the new asphalt pavement 6 and the old asphalt pavement 3, thereby reducing the possibility of cracks in the road.

[0029] like Figure 1 As shown, the new asphalt pavement 6 is laid on the asphalt bonding layer 7 and the old filling layer 2; the new asphalt pavement 6 is laid on the new filling layer 5, the asphalt bonding layer 7 and the old filling layer 2, and the new asphalt pavement 6 connects the new filling layer 5, the asphalt bonding layer 7 and the old filling layer 2, thereby improving the paving strength and reducing the possibility of cracks.

[0030] like Figure 4 As shown, the lower end of the plug sleeve 81 plugged into the old roadbed 1 is a tapered structure; the plug sleeve 81 with a tapered structure can be easily inserted into the old roadbed 1, thereby improving the convenience of use.

[0031] like Figure 3 , 4 As shown, one end of the fixed steel bar 82 and the connecting steel bar 85 are both conical structures, and the other end of the fixed steel bar 82 is fixedly connected with a stopper 9; the conical structure of the fixed steel bar 82 and the connecting steel bar 85 is convenient for insertion and installation, and at the same time, the stopper 9 can limit the fixed steel bar 82, so that the fixed steel bar 82 can stably limit the two sockets 81 to ensure the connection strength.

[0032] The implementation steps in this embodiment are as follows: when it is necessary to splice and widen the asphalt pavement, firstly, the old asphalt pavement 3, the old filling layer 2 and the old roadbed 1 are excavated from top to bottom in a step-like manner to form a connection step, and then a plurality of insert sleeves 81 are inserted into the old roadbed 1 from its upper surface, and then the fixed steel bar 82 is passed through another insert sleeve 81 and then inserted into the old roadbed 1 from its side wall, and the fixed steel bar 82 is plugged into the insert sleeve 81 in the old roadbed 1, and then the new roadbed 4 can be laid, so that the new roadbed 4 buries the fixed steel bar 82 and another insert sleeve 81 inside it, and after the new roadbed 4 is laid, the connecting steel bar 85 is passed through the two connecting sleeves 84, and one of the connecting steel bars 85 is inserted into the old roadbed 1. The end is inserted from one side of the old filling layer 2, and the new filling layer 5 is laid at this time, so that the new filling layer 5 fills the other end of the connecting steel bar 85. When filling the new filling layer 5, a certain gap is left between the new filling layer 5 and the old filling layer 2, and an asphalt bonding layer 7 is laid at the gap. The connecting steel bar 85 can be wrapped by the asphalt bonding layer 7 to improve the connection strength between the connecting steel bar 85 and the new filling layer 5 and the old filling layer 2. The fixed steel bar 82 can limit the mutual restriction of the two sleeves 81, so that the old roadbed 1 and the new roadbed 4 are fully tightened and connected. Finally, the new asphalt pavement 6 is laid on the new filling layer 5, the asphalt bonding layer 7 and the old filling layer 2.

[0033] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A flexible base asphalt pavement splicing and widening structure, comprising an old roadbed (1), an old filling layer (2) and an old asphalt pavement (3) laid in sequence from bottom to top, characterized in that: A new roadbed (4) is paved on one side of an old roadbed (1), a plurality of connection units (8) are arranged between the old roadbed (1) and the new roadbed (4), a new filling layer (5) is paved on the upper surface of the new roadbed (4), a new asphalt pavement (6) is paved on the upper surface of the new filling layer (5), and the connection unit (8) comprises two insert sleeves (81), the two insert sleeves (81) are respectively inserted into the old roadbed (1) and the new roadbed (4), and a fixed steel bar (82) is inserted between the two insert sleeves (81).

2. A flexible base asphalt pavement splicing and widening structure according to claim 1, characterized in that: The connecting unit (8) further comprises a plug-in rod (83), and the plug-in rod (83) is fixedly connected to the upper surface of the plug sleeve (81).

3. A flexible base asphalt pavement splicing and widening structure according to claim 2, characterized in that: The connection unit (8) further comprises a connection sleeve (84), the connection sleeve (84) being fixedly connected to the upper outer wall of the plug-in rod (83), a connection steel bar (85) being inserted between the two connection sleeves (84), and two ends of the connection steel bar (85) being respectively inserted into the new filling layer (5) and the old filling layer (2).

4. A flexible base asphalt pavement splicing and widening structure according to claim 3, characterized in that: An asphalt bonding layer (7) is laid between the old filling layer (2) and the new filling layer (5), and the asphalt bonding layer (7) is laid outside the plug-in rod (83), the connecting sleeve (84) and the connecting steel bar (85).

5. A flexible base asphalt pavement splicing and widening structure according to claim 4, characterized in that: The new asphalt pavement (6) is laid on the asphalt bonding layer (7) and the old filling layer (2).

6. The flexible base asphalt pavement splicing and widening structure according to claim 1 is characterized in that: The lower end of the plug sleeve (81) plugged into the old roadbed (1) is a tapered structure.

7. The flexible base asphalt pavement splicing and widening structure according to claim 3 is characterized in that: One end of the fixed steel bar (82) and the connecting steel bar (85) are both conical structures, and the other end of the fixed steel bar (82) is fixedly connected to a stopper (9).

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