Rapid construction method of pouring type semi-flexible pavement

Abstract

The invention discloses a rapid construction method of a pouring type semi-flexible pavement, which comprises the following steps of: 1, milling or digging a pit slot with the length, width and height of L1, W1 and H1 on the pavement; step 2, prefabricating a pouring type matrix asphalt mixture in a prefabricating field, compacting the asphalt mixture, and cutting the asphalt mixture into a plurality of prefabricated asphalt blocks with the length, width and height of L2, W2 and H2 respectively, or pouring a hot asphalt mixture into a mold with the length, width and height of L2, W2 and H2 respectively to manufacture the prefabricated asphalt blocks; 3, a plurality of prefabricated asphalt blocks are flatly laid in the pit slot to form a prefabricated layer; step 4, paving a matrix asphalt mixture on the prefabricated layer, and rolling and forming by using a steel wheel road roller to form an on-site paving layer; and 5, after the temperature of the on-site paving layer is naturally reduced to 50 DEG C or below, slurry is poured into the prefabricated layer and the on-site paving layer. The method is beneficial to paving, and the cooling time is shortened. The time for closing traffic on the site of the pouring type semi-flexible pavement is shorter, the construction speed is high, and the traffic influence is small.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt pavement repair methods and the like, and in particular to a rapid construction method for a poured-type semi-flexible pavement. Background Art

[0002] The current construction method for semi-flexible pavement is to first mill out the pits on the pavement, then spread the base asphalt mixture in the pits, roll it into shape, and then pour the slurry when it cools naturally to below 50°C. However, using this construction method, due to the thick thickness of the spread base asphalt mixture, it takes a long time for the asphalt mixture to cool naturally to below 50°C, which not only has a great impact on traffic, but also affects the quality of pavement grouting. Summary of the invention

[0003] In view of this, in order to solve the above problems, the object of the present invention is to provide a rapid construction method of a cast-in-place semi-flexible pavement, which comprises:

[0004] Step 1: Mill or dig a pit with a length, width and height of L1, W1 and H1 respectively on the road surface;

[0005] Step 2: In the prefabrication yard, prefabricate the pouring type base asphalt mixture, compact the asphalt mixture and cut it into a plurality of prefabricated asphalt blocks with the length, width and height of L2, W2 and H2 respectively, or pour the hot asphalt mixture into a mold with the length, width and height of L2, W2 and H2 respectively to make the prefabricated asphalt blocks;

[0006] Step 3: laying a number of the prefabricated asphalt blocks flat on the pit to form a prefabricated layer;

[0007] Step 4: Spreading the base asphalt mixture on the prefabricated layer, and rolling it with a steel wheel roller to form an on-site paving layer;

[0008] Step 5: After the temperature of the on-site paving layer naturally drops to below 50°C, pour slurry into the prefabricated layer and the on-site paving layer.

[0009] In the above-mentioned rapid construction method of a cast-type semi-flexible pavement, in step three, tack coat oil is applied to the pit by a spreader, and then a number of the prefabricated asphalt blocks are spread flat in the pit to form a prefabricated layer.

[0010] In the above-mentioned rapid construction method of a cast-in-place semi-flexible pavement, grooves are provided on the bottom and side walls of each of the prefabricated asphalt blocks.

[0011] In the above-mentioned rapid construction method of a cast-in-place semi-flexible pavement, the groove can be any one of a V-shaped groove and an S-shaped groove.

[0012] In the above-mentioned rapid construction method of a cast-in-place semi-flexible pavement, L1 and W1 are integer multiples of L2 and W2 respectively.

[0013] In the above-mentioned rapid construction method of a cast-in-place semi-flexible pavement, H1 is greater than H2, and H1-H2≥3cm.

[0014] The above-mentioned rapid construction method of a cast-in-place semi-flexible pavement, wherein, in step four, the base asphalt mixture spread on site is rolled as required using the steel wheel roller to form the on-site paving layer.

[0015] Compared with the prior art, the above technical solution has the following positive effects:

[0016] Through the application of the present invention, a rapid construction method for a poured semi-flexible pavement is provided, which first uses prefabricated asphalt blocks as prefabricated layers, and uses base asphalt mixture as on-site paving layers during on-site construction, and finally uses grouting to connect the prefabricated layers and on-site paving layers together, thereby reducing the on-site paving thickness of the base mixture of the poured semi-flexible pavement, being more conducive to paving, and reducing the cooling time. This makes the time used for closing traffic on-site of the poured semi-flexible pavement shorter, and has the advantages of fast construction speed and small traffic impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of repairing a cast-in-place semi-flexible pavement according to the present invention.

[0018] 1. Road surface; 2. Prefabricated asphalt blocks; 3. Prefabricated layer; 4. On-site paving layer. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations, but they are not intended to limit the present invention.

[0020] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0021] like Figure 1 As shown, a quick construction method of a cast-in-place semi-flexible pavement according to a preferred embodiment is shown, which includes:

[0022] Step 1: Mill or dig a pit on the road surface with a length, width and height of L1, W1 and H1 respectively; L1 is the horizontal length of the pit, W1 is the horizontal width of the pit, and H1 is the vertical height.

[0023] Step 2: In the prefabrication yard, prefabricate the pouring base asphalt mixture, compact the asphalt mixture and cut it into a number of prefabricated asphalt blocks 2 with a length, width and height of L2, W2 and H2 respectively, or pour the hot asphalt mixture into a mold with a length, width and height of L2, W2 and H2 respectively to make prefabricated asphalt blocks 2; L2 is the transverse length of the prefabricated asphalt block 2, W1 is the transverse width of the prefabricated asphalt block 2, and H1 is the longitudinal height of the prefabricated asphalt block 2.

[0024] Step 3: Lay several prefabricated asphalt blocks 2 flat on the pit to form a prefabricated layer 3; spread several prefabricated asphalt blocks 2 on the bottom of the pit. Prefabricated asphalt blocks 2 are prefabricated in advance in the factory and then transported to the construction site for use. When the prefabricated asphalt blocks 2 are placed at the bottom of the pit, if the total length and width of the combined prefabricated asphalt blocks 2 are large, the length and width of the prefabricated asphalt blocks 2 at the edge can be cut so that multiple prefabricated asphalt blocks 2 cover the pit to form a prefabricated layer 3.

[0025] Step 4: Spread the base asphalt mixture on the prefabricated layer 3, and use a steel wheel roller to roll and shape it to form an on-site paving layer 4;

[0026] Step 5: After the temperature of the on-site paving layer 4 naturally drops to below 50°C, grout is poured into the prefabricated layer 3 and the on-site paving layer 4. Grouting connects the prefabricated layer 3 and the on-site paving layer 4 to form a whole. Since the thickness of the on-site paving layer 4 is small, not only is paving faster, but the cooling time is also reduced, making the time required for closing the on-site traffic of the poured semi-flexible pavement shorter, with the advantages of fast construction speed and small traffic impact.

[0027] The present invention also has the following implementation modes based on the above:

[0028] Further, a quick construction method of a castable semi-flexible pavement is provided, wherein in step 3, a tack coat oil is applied to the pit by a spreading vehicle, and then a plurality of prefabricated asphalt blocks 2 are laid flat in the pit to form a prefabricated layer 3. Specifically, the tack coat oil can improve the bonding strength between the prefabricated asphalt blocks 2 and the bottom of the pit.

[0029] Furthermore, a quick construction method of a cast-in-place semi-flexible pavement is provided, wherein grooves are provided on the bottom and side walls of each prefabricated asphalt block 2. Specifically, the grooves can form an interlocking structure between the prefabricated asphalt blocks 2, thereby improving the overall strength of the prefabricated layer 3 and reducing the occurrence of reflective cracks.

[0030] Furthermore, a rapid construction method for a cast-in-place semi-flexible pavement is provided, wherein the groove can be either a V-shaped groove or an S-shaped groove.

[0031] Furthermore, a quick construction method for a cast-in-place semi-flexible pavement is provided, wherein L1 and W1 are integer multiples of L2 and W2, respectively. Specifically, a plurality of whole prefabricated asphalt blocks 2 can be used to pave the bottom of the pit without cutting the prefabricated asphalt blocks 2.

[0032] Further, a quick construction method of a cast-in-place semi-flexible pavement is provided, wherein H1 is greater than H2, and H1-H2≥3 cm. Specifically, the on-site paving layer 4 does not protrude from the pothole, and the upper surface of the on-site paving layer 4 is flush with the pavement.

[0033] Further, a quick construction method of a cast-in-place semi-flexible pavement is provided, wherein in step 4, a steel wheel roller is used to roll the on-site base asphalt mixture as required to form an on-site paving layer 4. Specifically, the upper surface of the on-site paving layer 4 formed by the pavement is made smoother by repeated rolling.

[0034] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A rapid construction method for a cast-in-place semi-flexible pavement, characterized in that: include: Step 1: Mill or dig a pit with a length, width and height of L1, W1 and H1 respectively on the road surface; Step 2: In the prefabrication yard, prefabricate the pouring type base asphalt mixture, compact the asphalt mixture and cut it into a plurality of prefabricated asphalt blocks with the length, width and height of L2, W2 and H2 respectively, or pour the hot asphalt mixture into a mold with the length, width and height of L2, W2 and H2 respectively to make the prefabricated asphalt blocks; Step 3: laying a number of the prefabricated asphalt blocks flat on the pit to form a prefabricated layer; Step 4: Spreading the base asphalt mixture on the prefabricated layer, and rolling it with a steel wheel roller to form an on-site paving layer; Step 5: After the temperature of the on-site paving layer naturally drops to below 50°C, pour slurry into the prefabricated layer and the on-site paving layer.

2. A rapid construction method for a cast-in-place semi-flexible pavement according to claim 1, characterized in that: In step three, tack coat oil is applied to the pit by a spreader, and then a number of the prefabricated asphalt blocks are spread flat in the pit to form a prefabricated layer.

3. The rapid construction method of a cast-in-place semi-flexible pavement according to claim 1, characterized in that: The bottom and side walls of each prefabricated asphalt block are provided with grooves.

4. A rapid construction method for a cast-in-place semi-flexible pavement according to claim 3, characterized in that: The groove may be a V-shaped groove or an S-shaped groove.

5. The rapid construction method of a cast-in-place semi-flexible pavement according to claim 1, characterized in that: The L1 and the W1 are integer multiples of the L2 and the W2 respectively.

6. The rapid construction method of a cast-in-place semi-flexible pavement according to claim 1, characterized in that: The H1 is greater than the H2, and the H1-H2≥3 cm.

7. The rapid construction method of a cast-in-place semi-flexible pavement according to claim 1, characterized in that: In step four, the steel wheel roller is used to roll the base asphalt mixture spread on site as required to form the on-site paving layer.

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