New and old pavement splicing device

Abstract

The utility model discloses a new and old pavement splicing device, which relates to the technical field of highway extension, and comprises an old pavement structure, a new pavement structure and a pavement reinforcing mechanism, a roadbed is paved below the old pavement structure, the new pavement structure is arranged on the right side of the old pavement structure, an upper base layer is paved below a lower surface layer, and a lower base layer is paved below a lower surface layer. A semi-rigid cushion layer is arranged below the lower base layer, and the pavement reinforcing mechanism is arranged on the right side of the upper base layer and the right side of the lower base layer. The old pavement structure and the new pavement structure adopt trapezoidal structures, the compressive strength of the device is enhanced by expanding the contact surface between the old pavement structure and the new pavement structure, the semi-rigid cushion layer in the old pavement structure is connected with the semi-rigid cushion layer in the new pavement structure through the stepped groove and the protruding end, and the compressive strength of the device is improved. The gap between the two semi-rigid cushion layers is filled through the stepped groove and the protruding end, accumulated water is prevented from permeating the semi-rigid cushion layers from the gap to damage the roadbed, and therefore the roadbed is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of highway expansion, in particular to a new and old road surface splicing device. Background Art

[0002] With the rapid development of my country's transportation industry, the traffic volume on highways and municipal roads has increased year by year. Many roads have reached or are approaching saturation before reaching their service life. There are basically two improvement measures for saturated highways: one is to build a double track, and the other is to expand and widen the original highway. Highway expansion and widening has the advantages of low investment and land saving. It is preferred when geological and environmental conditions permit. The splicing effect of the new and old pavement in the highway reconstruction and expansion project directly affects the construction quality and service life of the pavement. How to effectively splice the new and old pavement and reduce the occurrence of pavement diseases at the splicing point has always been a difficulty in the construction of reconstruction and expansion projects, and it is also one of its key technologies.

[0003] The existing joint surface of the new and old pavement is a vertical surface, so the gap is relatively large during splicing, and the compressive resistance of the joint is poor. The joint is prone to cracking and collapse under the pressure of the vehicle. The cushion layer in the pavement structure is mainly used for waterproofing and antifreeze. When the new and old pavement are spliced, there will definitely be gaps in the cushion layer structure. The accumulated water can easily enter the roadbed through the gaps and cause damage to the roadbed. For this reason, a new and old pavement splicing device is urgently needed. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a new and old pavement splicing device to solve the problem that the splicing surface of the existing new and old pavement is a vertical surface, so that the gap is relatively large during splicing, and the compressive resistance of the splicing is poor. The splicing is prone to cracking and collapse under the action of vehicle pressure. The cushion layer in the pavement structure is mainly used for waterproofing and antifreeze. When the new and old pavement are spliced, there will definitely be gaps in the cushion layer structure, and accumulated water can easily enter the roadbed through the gaps, causing damage to the roadbed.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new and old pavement splicing device, comprising an old pavement structure, a new pavement structure and a pavement reinforcement mechanism, a roadbed is laid below the old pavement structure, and the new pavement structure is arranged on the right side of the old pavement structure, the old pavement structure and the new pavement structure are both composed of an upper surface layer, a lower surface layer, an upper base layer, a lower base layer and a semi-rigid cushion layer, and the lower surface layer is laid below the upper surface layer, the upper base layer is laid below the lower surface layer, and the lower base layer is arranged below the upper base layer, and the semi-rigid cushion layer is arranged below the lower base layer, a step groove is arranged on the right side of the semi-rigid cushion layer in the old pavement structure, a protruding end is arranged on the left side of the semi-rigid cushion layer in the new pavement structure, and the pavement reinforcement mechanism is arranged on the right side of the upper base layer and the lower base layer.

[0006] Preferably, both the upper surface layer and the lower surface layer are made of asphalt material, and an adhesive layer is provided between the upper surface layer and the lower surface layer.

[0007] Preferably, the semi-rigid cushion layer in the old pavement structure is connected to the semi-rigid cushion layer in the new pavement structure through a stepped groove and a protruding end.

[0008] Preferably, the pavement reinforcement mechanism comprises an installation groove, concrete and steel bars, the interior of the installation groove is filled with concrete, and the steel bars are installed inside the concrete.

[0009] Preferably, the steel bar is arranged in an "L"-shaped structure, and one end of the steel bar is fixed inside the old pavement structure by concrete, and the other end of the steel bar is inserted into the new pavement structure.

[0010] Preferably, a plurality of the steel bars are provided, and the plurality of steel bars are parallel to each other.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the old pavement structure and the new pavement structure adopt a trapezoidal structure. By expanding the contact surface between the old pavement structure and the new pavement structure, the compressive strength of the device is enhanced. The semi-rigid cushion layer in the old pavement structure is connected with the semi-rigid cushion layer in the new pavement structure through the step groove and the protruding end. The gap between the two semi-rigid cushion layers is filled by the step groove and the protruding end, so that the accumulated water is prevented from penetrating the semi-rigid cushion layer from the gap to damage the roadbed, thereby protecting the roadbed;

[0013] 2. The utility model is provided with a pavement reinforcement mechanism. One end of the steel bar is fixed inside the upper and lower base layers of the old pavement structure through concrete, and the other end of the steel bar is compacted inside the upper and lower base layers of the new pavement structure. The connection strength between the base layers of the old pavement structure and the base layers of the new pavement structure is strengthened by the provision of the steel bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the old pavement structure of the utility model;

[0016] Figure 3 For the utility model Figure 1 Enlarged structural diagram at A in the middle.

[0017] In the figure: 1. old pavement structure; 2. upper surface layer; 3. lower surface layer; 4. upper base layer; 5. lower base layer; 6. semi-rigid cushion layer; 7. roadbed; 8. new pavement structure; 9. pavement reinforcement mechanism; 901. installation groove; 902. concrete; 903. steel bar; 10. step groove; 11. protruding end. DETAILED DESCRIPTION

[0018] 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. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0019] The following describes an embodiment of the utility model based on its overall structure.

[0020] See also Figure 1-3 A new and old pavement splicing device comprises an old pavement structure 1, a new pavement structure 8 and a pavement reinforcement mechanism 9, a roadbed 7 is paved below the old pavement structure 1, and the new pavement structure 8 is arranged on the right side of the old pavement structure 1, the old pavement structure 1 and the new pavement structure 8 are both composed of an upper surface layer 2, a lower surface layer 3, an upper base layer 4, a lower base layer 5 and a semi-rigid cushion layer 6, and a lower surface layer 3 is paved below the upper surface layer 2, the upper surface layer 2 and the lower surface layer 3 are both made of asphalt material, and an adhesive layer is arranged between the upper surface layer 2 and the lower surface layer 3, the upper surface layer 2 adopts a fine-grained asphalt layer, which is relatively dense and stable as a whole, and is anti-skid and wear-resistant, the lower surface layer 3 adopts a coarse-grained asphalt layer, the upper surface layer 2 and the lower surface layer 3 are fixed by the adhesive layer, thereby enhancing the connection strength between the upper surface layer 2 and the lower surface layer 3, an upper base layer 4 is paved below the lower surface layer 3, and a lower base layer 5 is arranged below the upper base layer 4, and below the lower base layer 5 A semi-rigid cushion layer 6 is provided, a step groove 10 is provided on the right side of the semi-rigid cushion layer 6 in the old pavement structure 1, and a protruding end 11 is provided on the left side of the semi-rigid cushion layer 6 in the new pavement structure 8. The semi-rigid cushion layer 6 in the old pavement structure 1 is connected to the semi-rigid cushion layer 6 in the new pavement structure 8 through the step groove 10 and the protruding end 11. The old pavement structure 1 and the new pavement structure 8 adopt a trapezoidal structure. By expanding the contact surface between the old pavement structure 1 and the new pavement structure 8, the compressive strength of the device is enhanced. The upper base layer 4 is mainly formed by compacting crushed stone and clay as an adhesive, and the lower base layer 5 is mainly formed by compacting cement and soil in proportion, and has high strength and stability. The setting of the semi-rigid cushion layer 6 can be used for drainage, water isolation and antifreeze, which is beneficial to protecting the roadbed 7. The gap between the two semi-rigid cushion layers 6 is filled by the step groove 10 and the protruding end 11 to prevent accumulated water from penetrating the semi-rigid cushion layer 6 from the gap to damage the roadbed 7, thereby protecting the roadbed 7;

[0021] The pavement reinforcement mechanism 9 is arranged on the right side of the upper base layer 4 and the lower base layer 5. The pavement reinforcement mechanism 9 includes a mounting groove 901, concrete 902 and steel bars 903. The interior of the mounting groove 901 is filled with concrete 902, and the interior of the concrete 902 is installed with steel bars 903. The pavement reinforcement mechanism 9 is used to enhance the connection strength between the old pavement structure 1 and the new pavement structure 8. The steel bars 903 are arranged in an "L"-shaped structure, and one end of the steel bars 903 is fixed to the interior of the old pavement structure 1 through the concrete 902, and the other end of the steel bars 903 is inserted into the interior of the new pavement structure 8. The old pavement structure 1, a plurality of installation grooves 901 are provided inside the right side of the upper base layer 4 and the lower base layer 5, one end of the steel bar 903 is placed inside the installation groove 901, and then concrete 902 is poured, so that one end of the steel bar 903 is firmly fixed inside the old pavement structure 1. When the new pavement structure 8 is constructed, the other end of the steel bar 903 is compacted inside the upper base layer 4 and the lower base layer 5 of the new pavement structure 8. A plurality of steel bars 903 are provided, and the plurality of steel bars 903 are parallel to each other. The provision of the steel bars 903 strengthens the connection strength between the base layer in the old pavement structure 1 and the base layer in the new pavement structure 8.

[0022] Working principle: When in use, the right side of the old pavement structure 1 is cut into an inclined surface, and then a number of installation grooves 901 are excavated on the right sides of the upper base layer 4 and the lower base layer 5 in the old pavement structure 1, and one end of the steel bar 903 is placed inside the installation groove 901, and concrete 902 is poured to make one end of the steel bar 903 firmly fixed inside the old pavement structure 1, and then the new pavement structure 8 is laid, and the semi-rigid cushion layer 6, the lower base layer 5, the upper base layer 4, the lower surface layer 3 and the upper surface layer 2 are laid from bottom to top. The semi-rigid cushion layer 6 is used for drainage, water isolation and antifreeze, which is beneficial to protect the roadbed 7, and the semi-rigid cushion layer 6 in the old pavement structure 1 and the semi-rigid cushion layer in the new pavement structure 8 are filled through the step groove 10 and the protruding end 11. The gaps between the layers 6 can prevent accumulated water from penetrating through the gaps and damaging the roadbed 7. The upper base layer 4 is mainly compacted with crushed stone and clay as an adhesive. The lower base layer 5 is mainly compacted with cement and soil in proportion. It has high strength and stability. When constructing a new pavement structure 8, the other end of the steel bar 903 is compacted inside the upper base layer 4 and the lower base layer 5 in the new pavement structure 8 to enhance the connection strength between the old pavement structure 1 and the new pavement structure 8. The upper surface layer 2 adopts a fine-grained asphalt layer, which is relatively dense and stable as a whole, and is anti-skid and wear-resistant. The lower surface layer 3 adopts a coarse-grained asphalt layer. The upper surface layer 2 and the lower surface layer 3 are fixed by an adhesive layer to enhance the connection strength between the upper surface layer 2 and the lower surface layer 3.

[0023] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0024] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the protection content of the present invention.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new and old road surface splicing device, comprising an old road surface structure (1), a new road surface structure (8) and a road surface reinforcement mechanism (9), characterized in that: A roadbed (7) is laid below the old pavement structure (1), and the new pavement structure (8) is arranged on the right side of the old pavement structure (1). Both the old pavement structure (1) and the new pavement structure (8) are composed of an upper surface layer (2), a lower surface layer (3), an upper base layer (4), a lower base layer (5) and a semi-rigid cushion layer (6), and the lower surface layer (3) is laid below the upper surface layer (2), the upper base layer (4) is laid below the lower surface layer (3), and the lower base layer (5) is arranged below the upper base layer (4), and the semi-rigid cushion layer (6) is arranged below the lower base layer (5). A stepped groove (10) is arranged on the right side of the semi-rigid cushion layer (6) in the old pavement structure (1), and a protruding end (11) is arranged on the left side of the semi-rigid cushion layer (6) in the new pavement structure (8), and the pavement reinforcement mechanism (9) is arranged on the right side of the upper base layer (4) and the lower base layer (5).

2. A new and old road surface splicing device according to claim 1, characterized in that: The upper surface layer (2) and the lower surface layer (3) are both made of asphalt material, and an adhesive layer is provided between the upper surface layer (2) and the lower surface layer (3).

3. A new and old road surface splicing device according to claim 1, characterized in that: The semi-rigid cushion layer (6) in the old pavement structure (1) is connected to the semi-rigid cushion layer (6) in the new pavement structure (8) via a stepped groove (10) and a protruding end (11).

4. The new and old road surface splicing device according to claim 1 is characterized in that: The road surface reinforcement mechanism (9) comprises an installation groove (901), concrete (902) and steel bars (903); the interior of the installation groove (901) is filled with concrete (902), and the interior of the concrete (902) is installed with steel bars (903).

5. A new and old road surface splicing device according to claim 4, characterized in that: The steel bar (903) is arranged in an "L"-shaped structure, and one end of the steel bar (903) is fixed inside the old pavement structure (1) through concrete (902), and the other end of the steel bar (903) is inserted into the new pavement structure (8).

6. The new and old road surface splicing device according to claim 4 is characterized in that: A plurality of the steel bars (903) are provided, and the plurality of steel bars (903) are parallel to each other.

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