Nanometer silicon dioxide reinforced high-doping-amount modified asphalt pavement structure

Abstract

The utility model relates to the technical field of asphalt pavements, and discloses a nano silicon dioxide reinforced high-mixing-amount modified asphalt pavement structure which comprises a roadbed, a base layer and a modified asphalt layer which are paved from bottom to top, wherein a manhole cover covers a sewage well preset on the roadbed; the sewage well is sleeved with the prefabricated protective sleeve, and the top of the prefabricated protective sleeve is flush with the top face of the well lid; the rubber buffer sleeve is filled in the circular seam between the outer side edge of the well lid and the prefabricated protective sleeve, the base plate is installed on the upper portion of the rubber buffer sleeve, the sewage well is sleeved with the prefabricated protective sleeve, and due to the fact that the prefabricated protective sleeve is prefabricated through high-strength concrete, the compressive strength is high; the problem that in an existing construction mode, due to the fact that asphalt materials are directly connected with the well lid in a laid mode, asphalt at the joints is prone to damage is solved; and the modified asphalt layer is laid on the top of the base layer and the prefabricated sheath, so that the contact adhesion is better, the compressive strength under the support of the prefabricated sheath is better, and the service life is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of asphalt pavement technology, specifically, it relates to a nano-silica reinforced high-dosage modified asphalt pavement structure. Background Technology

[0002] Adding silica fillers to asphalt pavements can improve pavement performance and durability. Silica fillers can increase the stability and anti-aging ability of asphalt mixtures, improve the crack resistance and durability of the pavement, and also improve the anti-skid performance and reduce road noise. By adding silica fillers, the service life of asphalt pavements can be extended and maintenance costs reduced. Silica pavement fillers refer to fillers in which silica is added to pavement materials. Silica can improve pavement performance and durability; for example, adding nano-silica to asphalt mixtures can improve the wear resistance and mechanical properties of the material. In addition, nano-silica can fill the spaces between cement particles, making the cement paste denser and improving the interface structure and performance. The application of silica fillers can extend the service life of pavements and improve their crack resistance, anti-skid performance, and noise reduction.

[0003] Currently, when asphalt pavement is poured, sewage manhole covers are pre-installed in the road. However, the current construction method is to pour the asphalt layer directly into contact with the manhole cover for easy later construction. However, because the asphalt pre-steel structure manhole cover has poor adhesion, the asphalt pavement around the manhole cover will fall off after a certain number of years of use. The reconstruction cycle is long and the construction is difficult.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] A nano-silica reinforced high-dosage modified asphalt pavement structure includes a roadbed, a base course, and a modified asphalt layer laid from bottom to top; wherein, a sewage well pre-installed on the roadbed is covered with a well cover;

[0007] It also includes a precast sleeve, which is fitted over the outside of the sewage well, with its top flush with the top surface of the well cover; a rubber buffer sleeve is filled in the annular gap between the outer edge of the well cover and the precast sleeve, and a pad is installed on the top of the rubber buffer sleeve. The precast sleeve is fitted over the sewage well. Because the precast sleeve is made of high-strength concrete, it has high compressive strength. This avoids the problem of easy damage to the asphalt at the joint caused by the direct connection between the asphalt material and the well cover in the existing construction method.

[0008] Furthermore, the modified asphalt layer, when laid on the base layer and the top of the precast sheath, exhibits better contact adhesion and greater compressive strength under the support of the precast sheath, thus extending its service life.

[0009] In a preferred embodiment of this utility model, the upper part of the prefabricated sheath is provided with an annular groove.

[0010] In a preferred embodiment of this utility model, the modified asphalt layer is extended and poured onto the inside corner groove.

[0011] In a preferred embodiment of this utility model, the prefabricated sheath is a high-strength concrete prefabricated component.

[0012] In a preferred embodiment of this utility model, the prefabricated sheath is overlapped on the roadbed and is encased and poured by the base layer and the modified asphalt layer.

[0013] In a preferred embodiment of this utility model, the prefabricated sheath is embedded with multiple layers of reinforcing ribs.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] During construction, this utility model involves placing a prefabricated protective sleeve over the sewage well. Since the prefabricated sleeve is made of high-strength concrete, it has high compressive strength. This avoids the problem of easy damage to the asphalt at the joints caused by the direct connection between the asphalt material and the well cover in existing construction methods.

[0016] Furthermore, the modified asphalt layer, when laid on the base layer and the top of the precast sheath, exhibits better contact adhesion and greater compressive strength under the support of the precast sheath, thus extending its service life.

[0017] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0018] In the attached diagram:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This utility model Figure 1 A magnified structural diagram at point A.

[0021] In the diagram: 1. Roadbed; 2. Base course; 3. Modified asphalt layer; 4. Manhole cover; 5. Sewage well; 6. Precast protective sleeve; 7. Corner groove; 8. Pad; 9. Rubber buffer sleeve; 10. Reinforcing rib. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0023] like Figures 1 to 2 As shown, a nano-silica reinforced high-dosage modified asphalt pavement structure includes a roadbed 1, a base course 2, and a modified asphalt layer 3 laid from bottom to top; wherein, a sewage well 5 pre-installed on the roadbed 1 is covered with a well cover 4; it also includes a prefabricated protective sleeve 6, which is fitted over the sewage well 5 and is flush with the top surface of the well cover 4; a rubber buffer sleeve 9 is filled in the annular gap between the outer edge of the well cover 4 and the prefabricated protective sleeve 6, and a pad 8 is installed on the upper part of the rubber buffer sleeve 9.

[0024] like Figures 1 to 2 As shown, furthermore, the upper part of the precast sheath 6 is provided with an annular groove 7, and the modified asphalt layer 3 extends and is cast into the groove 7. In this configuration, the groove 7 can better provide space for the modified asphalt layer 3 to form a tight seal with the precast sheath 6 during casting.

[0025] like Figures 1 to 2 As shown, the precast sheath 6 is a high-strength precast concrete component. The precast sheath 6 overlaps the roadbed 1 and is encased and cast by the base course 2 and the modified asphalt layer 3. Multiple layers of reinforcing ribs 10 are embedded within the precast sheath 6. The reinforcing ribs 10 improve the compressive strength of the precast sheath 6.

[0026] The implementation principle of a nano-silica reinforced high-dosage modified asphalt pavement structure in this embodiment is as follows: During construction, a precast protective sleeve 6 is fitted onto the sewage well 5. Since the precast protective sleeve 6 is made of high-strength concrete, it has high compressive strength. This avoids the problem of easy damage to the asphalt at the joint caused by the direct connection between the asphalt material and the well cover in the existing construction method.

[0027] Furthermore, the modified asphalt layer 3 is laid on top of the base layer 2 and the precast sheath 6, resulting in better contact adhesion and better compressive strength under the support of the precast sheath 6, thus extending its service life.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0030] The above description is only a specific embodiment of the present utility model. Various examples and illustrations do not constitute a limitation on the substantive content of the present utility model. Those skilled in the art can make modifications or variations to the specific embodiments described above after reading the description without departing from the essence and scope of the utility model.

Claims

1. A nano-silica reinforced high-dosage modified asphalt pavement structure, characterized in that, It includes the roadbed (1), base course (2) and modified asphalt layer (3) laid from bottom to top; Among them, the sewage well (5) pre-set on the roadbed (1) is covered with a well cover (4). It also includes a prefabricated sheath (6), which is fitted over the outside of the sewage well (5) and is flush with the top of the well cover (4); The annular gap between the outer edge of the manhole cover (4) and the prefabricated sleeve (6) is filled with a rubber buffer sleeve (9), and a pad (8) is installed on the upper part of the rubber buffer sleeve (9).

2. The nano-silica reinforced high-dosage modified asphalt pavement structure according to claim 1, characterized in that, The upper part of the prefabricated sheath (6) is provided with an annular groove (7).

3. The nano-silica reinforced high-dosage modified asphalt pavement structure according to claim 2, characterized in that, The modified asphalt layer (3) is extended and poured into the corner groove (7).

4. The nano-silica reinforced high-dosage modified asphalt pavement structure according to claim 3, characterized in that, The precast sheath (6) is a high-strength concrete precast component.

5. The nano-silica reinforced high-dosage modified asphalt pavement structure according to claim 4, characterized in that, The precast sheath (6) is overlapped on the roadbed (1) and is covered and cast by the base course (2) and the modified asphalt layer (3).

6. The nano-silica reinforced high-dosage modified asphalt pavement structure according to claim 1, characterized in that, The prefabricated sheath (6) is embedded with multiple layers of reinforcing ribs (10).

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