CN215906481U

CN215906481U - Road surface structure suitable for highway major-medium maintenance and regenerated by utilizing old road waste

Info

Publication number: CN215906481U
Application number: CN202121520055.7U
Authority: CN
Inventors: 蔡晓斌; 刘同根; 彭波; 秦凯; 李云鹏; 欧彩云; 顾甘霖; 郝莲子; 林文虎; 杨艳山; 徐超; 赵晓龙; 单敏; 成明轩
Original assignee: Jiangsu Ts Traffic Design & Research Institute Co ltd; Huai'an Highway Development Center
Current assignee: Jiangsu Ts Traffic Design & Research Institute Co ltd; Huai'an Highway Development Center
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2022-02-25
Anticipated expiration: 2031-07-06

Abstract

The utility model discloses a road surface structure regenerated by old road waste and suitable for highway major-minor repair, which is mainly suitable for major-minor repair roads needing milling old road surface layers and base layers; comprises an old road subbase layer arranged at the bottommost layer; the subbase layer of the old road needs to be subjected to disease treatment and repaired, and a regenerated water-stable gravel layer, a water-stable gravel upper base layer seal coat and a surface layer are sequentially paved on the subbase layer of the old road from bottom to top; the regenerated water-stable gravel layer is obtained by doping aggregate of old road milling materials into water-stable gravel. The utility model can recycle the waste material of the old road surface structure, can effectively utilize the old material of the old road surface, is beneficial to reducing the pollution of the old road waste material to the environment, can save resources and improve the utilization rate of the resources.

Description

Road surface structure suitable for highway major-medium maintenance and regenerated by utilizing old road waste

Technical Field

The utility model relates to a pavement structure for regenerating a new pavement by using waste materials of an old highway when a highway is maintained, in particular to a pavement structure regenerated by using waste materials of the old highway, which is suitable for the major and middle repair of the highway.

Background

In recent years, with the rapid development of economy in China, roads in China develop rapidly, and after years of operation and use, pavement diseases are generated on part of roads, so that the driving comfort and safety of vehicles are seriously influenced. Therefore, the roads have entered the major and middle maintenance stage, the major and middle maintenance mileage of the roads is often longer, the construction is carried out by using the traditional road surface material and maintenance scheme, and the old road surface structure is often milled and paved with new materials such as water-stable macadam and asphalt, which not only generates a large amount of old road waste materials and causes pollution to the environment, but also the new road surface structure needs to generate more new resources; the cost of road surface maintenance is higher, and resources are wasted.

Disclosure of Invention

Aiming at the technical problems, the technical scheme provides the road surface structure which is suitable for the major and middle repair of the highway and is regenerated by using the old road waste materials, when the road is suitable for the major and middle repair of the highway, the waste materials in the road surface structure of the old road are used for regeneration, the old road materials can be effectively used, the pollution of the old road waste materials to the environment is favorably reduced, the resources are favorably saved, the utilization rate of the resources is improved, the ecological civilized construction is promoted, and the sustainable development of the highway traffic is realized.

The utility model is realized by the following technical scheme:

a road surface structure regenerated by old road waste suitable for the major and middle repair of highways comprises a road surface structure and a central dividing strip, wherein the road surface structure comprises an old road sub-base layer arranged at the bottommost layer; the subbase layer of the old road needs to be subjected to disease treatment and repaired, and a regenerated water-stable gravel layer, a water-stable gravel upper base layer, a seal coat and a surface layer are sequentially paved on the subbase layer of the old road from bottom to top; the regenerated water-stable gravel layer is formed by paving regenerated water-stable gravel obtained by processing aggregate of old road milling and planing by doping water-stable gravel.

Furthermore, the reclaimed water-stable macadam is obtained by matching aggregate with the grain diameter of 0-31.5 mm in the milling material of the old road with the water-stable macadam.

Further, the aggregate with the particle size of 0mm-31.5mm is obtained by screening with a pore size sieve with the pore size of 31.5 mm; the screened super-grain size aggregate is subjected to the operation of crushing and screening again until all the aggregate is screened out into the aggregate with the grain size of 0mm-31.5mm for use.

Furthermore, the reclaimed water-stable macadam is obtained by adopting 30% of old road milling aggregate and then doping a certain proportion of water-stable macadam.

Furthermore, the seal layer adopts an asphalt seal layer.

Furthermore, the surface layer comprises an asphalt lower surface layer and an asphalt upper surface layer; the lower asphalt surface layer comprises SUP-25, coarse-grained asphalt concrete AC-25C and plant-mixed hot recycled asphalt concrete; the asphalt upper surface layer comprises SBS modified SMA-13 and fine grain type asphalt concrete AC-13C.

Further, the subbase of the old road comprises low-dose cement stabilized macadam, lime soil and cement lime soil after disease treatment and repair are completed.

Furthermore, among the road surface structure, its one end that is close to central median, the downside that is located the pitch upper surface layer is provided with the concrete dog, the height of concrete dog and road surface structure's pitch lower surface layer, pitch seal coat, water stable rubble upper base layer and the height of regeneration water stable rubble layer are corresponding.

Further, the concrete block comprises C30 concrete and C35 concrete.

Furthermore, a median strip kerb is arranged between the pavement structure and the central separation strip, and the median strip kerb can be granite kerb and/or concrete kerb.

Furthermore, a greening and a guardrail are arranged in the central separation belt.

Advantageous effects

Compared with the prior art, the road surface structure regenerated by the old road waste material and suitable for the major and middle repair of the highway provided by the utility model has the following beneficial effects:

(1) this technical scheme is through setting up the steady rubble layer of regeneration water at old way subbase upside, and the steady rubble layer of regeneration water adopts the steady rubble layer of regeneration water to be laid and form by the steady rubble of regeneration water that obtains after the steady rubble of aggregate that adopts old way milling plane material is processed. The waste materials in the road surface structure of the old road are utilized for regeneration, the old road materials can be effectively utilized, the pollution of the old road waste materials to the environment is reduced, the utilization rate of resources is improved, and the resources are saved.

(2) According to the technical scheme, the milling material of the old road is crushed into aggregate with the grain diameter of 0mm-31.5mm, and then the aggregate is matched with the water-stable macadam to obtain the regenerated water-stable macadam, so that the firmness of the regenerated water-stable macadam layer can be improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

The labels in the figures are: 1-regenerated water-stable gravel layer, 2-water-stable gravel upper base layer, 3-asphalt seal layer, 4-asphalt lower surface layer, 5-asphalt upper surface layer, 6-concrete block, 7-old road subbase layer, 8-median band kerb and 9-central separation band.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are only some embodiments of the utility model, not all embodiments. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and all of them should fall into the protection scope of the present invention.

Example 1:

as shown in fig. 1, a pavement structure regenerated by old road waste suitable for the major and middle repair of highways comprises a pavement structure and a central dividing strip 9, wherein the pavement structure comprises an old road sub-base layer 7 arranged at the bottommost layer; and a regenerated water stable gravel layer 1, a water stable gravel upper base layer 2, an asphalt seal layer 3, an asphalt lower surface layer 4 and an asphalt upper surface layer 5 are sequentially paved on the upper side of the old road subbase layer 7 from bottom to top.

The old road subbase 7 needs to be subjected to disease treatment and renovation, and when the old road subbase 7 is renovated, the old road subbase 7 is subjected to disease treatment after the old road surface layer and the base layer are milled. The subbase 7 of the old road comprises low-dose cement stabilized macadam, lime soil and cement lime soil after disease treatment and repair are completed.

The reclaimed water-stable gravel layer 1 is formed by paving reclaimed water-stable gravel obtained by processing aggregate of old road milling and planing by doping water-stable gravel. The reclaimed water-stable macadam is prepared by adopting plant-mixed reclaimed water-stable macadam, and the plant-mixed reclaimed water-stable macadam is prepared by matching aggregate with the particle size of 0-31.5 mm in milling material of an old road with the water-stable macadam. The aggregate with the grain diameter of 0mm-31.5mm is obtained by screening with a pore size sieve with the pore size of 31.5 mm; the screened super-grain aggregate can be subjected to secondary crushing and screening, the super-grain aggregate is recycled, piled and crushed, sampled and subjected to multi-group screening test detection until all the aggregate is screened into the aggregate with the grain size of 0-31.5 mm and then used. The regenerated water-stable macadam is obtained by adopting 30% of old road milling material aggregate and then doping a certain proportion of water-stable macadam.

The water-stable gravel layer 2 is obtained by directly paving plant-mixed water-stable gravel.

The seal layer adopts an asphalt seal layer 3.

The surface layer comprises an asphalt lower surface layer 4 and an asphalt upper surface layer 5; the asphalt lower surface layer 4 comprises SUP-25, coarse-grained asphalt concrete AC-25C and plant-mixed hot recycled asphalt concrete; the asphalt upper surface layer 5 comprises SBS modified SMA-13 and fine grain type asphalt concrete AC-13C.

In the road surface structure, its one end that is close to central median 9, the downside that is located pitch upper surface 5 is provided with concrete dog 6, and concrete dog 6 highly corresponds with the height of pitch lower surface 4, pitch seal 3, the water-stable rubble upper substrate 2 and the stable rubble layer 1 of regeneration water of road surface structure. The concrete block 6 comprises C30 concrete and C35 concrete.

And a median strip kerb 8 is arranged between the pavement structure and the central separation strip, and the median strip kerb 8 can be granite kerb and/or concrete kerb. The central separation belt 9 is internally provided with greening and guard rails.

Claims

1. A pavement structure regenerated by old road waste suitable for the major and middle repair of highways comprises a pavement structure and a central dividing strip (9), wherein the pavement structure comprises an old road sub-base layer (7) arranged at the bottommost layer; the method is characterized in that: the old road subbase layer (7) needs to be subjected to disease treatment and repaired, and a regenerated water stable gravel layer (1), a water stable gravel upper base layer (2), a sealing layer and a surface layer are additionally paved on the upper side of the old road subbase layer from bottom to top in sequence.

2. The pavement structure suitable for highway overhaul and repair and regenerated by using waste old road materials as claimed in claim 1, wherein: the seal layer adopts an asphalt seal layer (3).

3. The pavement structure suitable for highway overhaul and repair and regenerated by using waste old road materials as claimed in claim 1, wherein: the surface layer comprises an asphalt lower surface layer (4) and an asphalt upper surface layer (5).

4. The pavement structure suitable for highway overhaul and repair and regenerated by using waste old road materials as claimed in claim 1, wherein: the road surface structure in, its one end that is close to central median (9), the downside that is located pitch upper surface layer (5) is provided with concrete dog (6), the height of concrete dog (6) and road surface structure's pitch lower surface layer (4), pitch seal coat (3), water stable rubble upper base layer (2) and the height of regeneration water stable rubble layer (1) are corresponding.

5. The pavement structure suitable for highway overhaul and repair and regenerated by using waste old road materials as claimed in claim 1, wherein: and a median strip kerb (8) is arranged between the pavement structure and the central separation strip (9), and the median strip kerb (8) can adopt granite kerb and/or concrete kerb.