Expressway reconstruction and extension pavement structure

Abstract

The utility model discloses an expressway reconstruction and extension pavement structure, and belongs to the field of road reconstruction and extension, the expressway reconstruction and extension pavement structure comprises an original pavement, a paver, a milling machine and a grouting machine, the top of the original pavement is provided with a roadbed reinforcing layer, the top of the roadbed reinforcing layer is provided with a transition layer assembly, and the top of the transition layer assembly is provided with a surface layer assembly; by arranging the roadbed reinforcing layer, the transition layer assembly, the surface layer assembly, the paver, the milling machine and the grouting machine, the construction period is short, the influence on traffic is small, the timeliness requirement of expressway reconstruction and extension can be met, the bonding strength of new and old pavements is high, the quality problems of reflection cracks, uneven settlement and the like are effectively avoided, meanwhile, the construction cost is controllable, the construction efficiency is high, and the construction period is shortened. And the method has remarkable economic benefits and social benefits.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road reconstruction and expansion, in particular to a rapid road reconstruction and expansion pavement structure. BACKGROUND

[0002] With the acceleration of urbanization, the traffic flow of the existing rapid road is increasing day by day, and the original road traffic capacity cannot meet the demand, so it is necessary to reconstruct and expand the rapid road. At present, the commonly used technologies in rapid road reconstruction and expansion engineering include full-section excavation reconstruction, half-width construction half-width traffic, etc. These technologies often face problems such as complex traffic organization, long construction period, and great influence on the surrounding environment during construction. In addition, the traditional pavement structure is prone to quality problems such as poor connection between new and old pavements and uneven settlement during reconstruction, which affects the service life and driving comfort of the road.

[0003] The specific solutions of the prior art are as follows: full-section excavation reconstruction: the original pavement is completely removed and then new pavement is laid, which has the advantages of controllable construction quality and the disadvantage of long construction period and great influence on traffic; half-width construction half-width traffic: one side of the lane is kept for traffic and the other side of the lane is constructed, which has the advantages of reducing the influence on traffic and the disadvantage of complex construction organization and long construction period; overlay method: directly overlaying new pavement layer on the original pavement, which has the advantages of fast construction speed and the disadvantage of easy reflection cracks and insufficient bonding strength between new and old pavements; milling and overlay method: milling the surface layer of the original pavement and then overlaying new pavement layer, which has the advantages of improving the bonding performance between new and old pavements and the disadvantage of high requirement for milling depth control and high construction cost.

[0004] The defects of the prior art are as follows: full-section excavation reconstruction and half-width construction half-width traffic have long construction period and great influence on traffic, which cannot meet the timeliness requirement of rapid road reconstruction and expansion; although the overlay method and the milling and overlay method have fast construction speed, they have the problems of insufficient bonding strength between new and old pavements, easy reflection cracks and uneven settlement, which affect the service life and driving comfort of the pavement. CONTENT OF THE UTILITY MODEL

[0005] In view of the deficiencies of the prior art, the present utility model provides a rapid road reconstruction and expansion pavement structure, which overcomes the deficiencies of the prior art and aims to solve the problems in the background art.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a rapid road reconstruction and expansion pavement structure, comprising an original pavement, a paver, a milling machine and a grouting machine, a roadbed reinforcement layer is installed on the top of the original pavement, a transition layer assembly is installed on the top of the roadbed reinforcement layer, and a surface layer assembly is installed on the top of the transition layer assembly.

[0007] As a preferred implementation, the milling machine is selected from a Vitek W2000 type milling machine, the milling width is 2m, the milling depth is adjustable in the range of 0-30cm, the grouting machine is selected from a ZBJ-300 type high-pressure grouting pump, the maximum grouting pressure is 1.0MPa, and the paver is selected from a Vogele SUPER 1800-3 type paver, the paving width is 1.8m.

[0008] By adopting the technical scheme, the original road surface layer can be milled to remove loose and damaged parts, the original road surface after milling is grouted by the grouting machine to improve the bearing capacity and stability of the original road surface, and the roadbed reinforcement layer, the transition layer assembly and the surface layer assembly are paved by the paver.

[0009] As a preferred implementation, the transition layer assembly includes a high-strength bonding layer and a stress absorption layer, the high-strength bonding layer is laid on top of the roadbed reinforcement layer, and the stress absorption layer is laid on top of the high-strength bonding layer.

[0010] By adopting the technical scheme, the bonding strength of the new and old road surfaces can be enhanced, and the stress generated by the vehicle load can be absorbed to reduce the generation of reflection cracks.

[0011] As a preferred implementation, the surface layer assembly includes a modified asphalt concrete layer and a wear-resistant surface layer, the modified asphalt concrete layer is laid on top of the stress absorption layer, and the wear-resistant surface layer is laid on top of the modified asphalt concrete layer.

[0012] By adopting the technical scheme, a complete new road surface structure can be formed to ensure the firmness of the road surface.

[0013] As a preferred implementation, the roadbed reinforcement layer is a cement-based composite material, and a polymer grouting material can be used instead.

[0014] By adopting the technical scheme, the grouting reinforcement effect can be improved.

[0015] As a preferred implementation, the high-strength bonding layer has a thickness of 2-3mm, the stress absorption layer has a thickness of 4-6cm, the paving temperature is not less than 160℃, rubber asphalt mixture is used, the modified asphalt concrete layer has a thickness of 8-10cm, SBS modified asphalt mixture is used, and the paving temperature is not less than 170℃, the wear-resistant surface layer has a thickness of 2-3cm, basalt aggregate asphalt mixture is used, and the paving temperature is not less than 160℃.

[0016] By adopting the technical scheme, the tightness of the connection between the layers after paving can be ensured, and the layers can not be easily separated after a long period of use.

[0017] The beneficial effects of the present application are as follows:

[0018] The rapid road reconstruction pavement structure has the advantages that the construction period is short, the traffic influence is small, the timeliness requirement of rapid road reconstruction can be met, the combination strength of new and old pavements is high, quality problems such as reflection cracks and uneven settlement are effectively avoided, the construction cost is controllable, the construction efficiency is high, and remarkable economic and social benefits are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0020] Figure 2 It is a schematic diagram of the local structure of the present application.

[0021] Figure 3 It is a schematic diagram of the transition layer assembly structure of the present application.

[0022] Figure 4 It is a schematic diagram of the surface layer assembly structure of the present application.

[0023] In the figure, 1 is the original pavement, 2 is the roadbed reinforcement layer, 3 is the transition layer assembly, 301 is the high-strength bonding layer, 302 is the stress absorption layer, 4 is the surface layer assembly, 401 is the modified asphalt concrete layer, 402 is the wear-resistant surface layer, 5 is the paving machine, 6 is the milling machine, and 7 is the grouting machine. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0025] Reference Figures 1-4 The rapid road reconstruction pavement structure comprises an original pavement 1, a paving machine 5, a milling machine 6, and a grouting machine 7. The top of the original pavement 1 is provided with a roadbed reinforcement layer 2. The top of the roadbed reinforcement layer 2 is provided with a transition layer assembly 3. The top of the transition layer assembly 3 is provided with a surface layer assembly 4.

[0026] Reference Figure 1, the milling machine 6 is selected from a W2000 type milling machine of Vitec, the milling width is 2m, the milling depth is adjustable in the range of 0-30cm, the grouting machine 7 is selected from a ZBJ-300 type high pressure grouting pump, the maximum grouting pressure is 1.0MPa, the paver 5 is selected from a SUPER 1800-3 type paver of Vogele, the paving width is 1.8m, so that the original pavement surface can be milled to remove the loose and damaged parts, the original pavement 1 after milling is grouted and reinforced by the grouting machine 7, the bearing capacity and stability of the original pavement 1 are improved, and the roadbed reinforcement layer 2, the transition layer assembly 3 and the surface layer assembly 4 are paved by the paver 5.

[0027] Referring to Figure 2 and Figure 3 , the transition layer assembly 3 includes a high-strength bonding layer 301 and a stress absorption layer 302, the high-strength bonding layer 301 is laid on the roadbed reinforcement layer 2, and the stress absorption layer 302 is laid on the high-strength bonding layer 301, so that the bonding strength of the new and old pavements can be enhanced and the stress generated by the vehicle load can be absorbed, and the generation of reflection cracks can be reduced.

[0028] Referring to Figure 2 and Figure 4 , the surface layer assembly 4 includes a modified asphalt concrete layer 401 and a wear-resistant surface layer 402, the modified asphalt concrete layer 401 is laid on the stress absorption layer 302, and the wear-resistant surface layer 402 is laid on the modified asphalt concrete layer 401, so that a complete new pavement structure can be formed to ensure the firmness of the pavement.

[0029] Referring to Figure 2 , the roadbed reinforcement layer 2 is a cement-based composite material, and can be replaced by a polymer grouting material, so that the grouting reinforcement effect can be improved.

[0030] Referring to Figure 3 and Figure 4 , the thickness of the high-strength bonding layer 301 is 2-3mm, the thickness of the stress absorption layer 302 is 4-6cm, the paving temperature is not less than 160℃, the rubber asphalt mixture is used, the thickness of the modified asphalt concrete layer 401 is 8-10cm, the SBS modified asphalt mixture is used, the paving temperature is not less than 170℃, the thickness of the wear-resistant surface layer 402 is 2-3cm, the basalt aggregate asphalt mixture is used, and the paving temperature is not less than 160℃, so that the tightness of the connection between the layers after paving can be ensured, and the layers can not be easily separated after a long period of use.

[0031] Working principle: firstly, the original road surface layer is milled by the milling machine 6, and the loose and damaged parts are removed; then the grouting machine 7 is used to grout the milled base to improve the bearing capacity and stability of the base; then the high-strength bonding layer 301 is laid to enhance the bonding strength of the new and old pavements, then the stress absorbing layer 302 is laid to absorb the stress generated by the vehicle load and reduce the generation of reflection cracks, finally, the modified asphalt concrete layer 401 and the wear-resistant surface layer 402 are laid in turn, so as to form a complete new pavement structure.

[0032] In the description of the utility model, it needs to be explained that the directions or position relations indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like are the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicative or suggestive of relative importance.

[0033] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements inside. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0034] The utility model has been described above in combination with specific embodiments, but those skilled in the art should understand that these descriptions are exemplary and are not limiting the protection scope of the utility model. Those skilled in the art can make various modifications and changes to the utility model according to the spirit and principles of the utility model, and these modifications and changes are also within the scope of the utility model.

Claims

1. A road surface structure for expressway reconstruction and expansion, comprising an existing road surface (1), a paver (5), a milling machine (6), and a grouting machine (7), characterized in that, The original road surface (1) is topped with a roadbed reinforcement layer (2), the roadbed reinforcement layer (2) is topped with a transition layer assembly (3), and the transition layer assembly (3) is topped with a surface layer assembly (4).

2. The pavement structure for expressway reconstruction and expansion according to claim 1, characterized in that, The milling machine (6) is a Wirtgen W2000 milling machine with a milling width of 2m and an adjustable milling depth of 0-30cm. The grouting machine (7) is a ZBJ-300 high-pressure grouting pump with a maximum grouting pressure of 1.0MPa. The paver (5) is a Vogele SUPER 1800-3 paver with a paving width of 1.8m.

3. The pavement structure for expressway reconstruction and expansion according to claim 1, characterized in that, The transition layer assembly (3) includes a high-strength adhesive layer (301) and a stress-absorbing layer (302). The high-strength adhesive layer (301) is laid on top of the roadbed reinforcement layer (2), and the stress-absorbing layer (302) is laid on top of the high-strength adhesive layer (301).

4. The pavement structure for expressway reconstruction and expansion according to claim 3, characterized in that, The surface layer component (4) includes a modified asphalt concrete layer (401) and a wear-resistant surface layer (402), wherein the modified asphalt concrete layer (401) is laid on top of the stress-absorbing layer (302) and the wear-resistant surface layer (402) is laid on top of the modified asphalt concrete layer (401).

5. The pavement structure for expressway reconstruction and expansion according to claim 1, characterized in that, The roadbed reinforcement layer (2) is a cement-based composite material, and polymer grouting material can be used instead.

6. The pavement structure for expressway reconstruction and expansion according to claim 4, characterized in that, The high-strength bonding layer (301) has a thickness of 2-3 mm, the stress-absorbing layer (302) has a thickness of 4-6 cm, the paving temperature is not lower than 160℃, and it uses rubber asphalt mixture; the modified asphalt concrete layer (401) has a thickness of 8-10 cm, it uses SBS modified asphalt mixture, the paving temperature is not lower than 170℃; the wear-resistant surface layer (402) has a thickness of 2-3 cm, it uses basalt aggregate asphalt mixture, and the paving temperature is not lower than 160℃.

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