阅读说明：本技术 一种新旧沥青路面搭接结构及施工方法 (New and old asphalt pavement lap joint structure and construction method ) 是由 阚义森 赵山虎 徐小明 牛文克 宋文奇 于 2020-06-03 设计创作，主要内容包括：本发明涉及路面施工领域,公开一种新旧沥青路面搭接结构及施工方法。所述新旧沥青路面搭接结构包括旧路面结构和新路面结构,旧路面结构设置有台阶状的搭接面,新路面结构包括自下而上依次设置的水泥稳定碎石层、乳化沥青透层、粗粒式沥青混凝土层、改性乳化沥青粘层和细粒式沥青混凝土层,水泥稳定碎石层、乳化沥青透层和粗粒式沥青混凝土层均与搭接面贴靠,改性乳化沥青粘层和细粒式沥青混凝土层延伸覆盖至旧路面结构的上表面。所述新旧沥青路面搭接施工方法用于施工上述的新旧沥青路面搭接结构。本发明不但可以增加新旧路面搭接处的压实度,而且对路面结构工程防水也能起到很大作用。(The invention relates to the field of pavement construction, and discloses a new and old asphalt pavement lap joint structure and a construction method. New and old bituminous paving overlap joint structure includes old road surface structure and new road surface structure, old road surface structure is provided with the faying surface of step form, new road surface structure includes the cement that sets gradually from bottom to top and stabilizes the metalling, emulsified asphalt passes through the layer, coarse grain formula asphalt concrete layer, modified emulsified asphalt adhesion layer and fine grain formula asphalt concrete layer, the metalling is stabilized to cement, emulsified asphalt passes through layer and coarse grain formula asphalt concrete layer and all leans on with the faying surface, modified emulsified asphalt adhesion layer and fine grain formula asphalt concrete layer extend to cover to the upper surface of old road surface structure. The new and old asphalt pavement lap construction method is used for constructing the new and old asphalt pavement lap structure. The invention not only can increase the compaction degree of the lap joint of the new and old road surfaces, but also can play a great role in the water resistance of the road surface structural engineering.)

1. The utility model provides a new and old bituminous paving overlap joint structure which characterized in that includes:

the old pavement structure (1) is provided with a step-shaped lapping surface (11);

new road surface structure (2), including cement that sets gradually from bottom to top stabilize rubble layer (21), emulsified asphalt permeable layer (22), coarse grain formula asphalt concrete layer (23), modified emulsified asphalt binder layer (24) and fine grain formula asphalt concrete layer (25), cement stabilize rubble layer (21) emulsified asphalt permeable layer (22) with coarse grain formula asphalt concrete layer (23) all with faying surface (11) are leaned on, modified emulsified asphalt binder layer (24) with fine grain formula asphalt concrete layer (25) extend to cover to the upper surface of old road surface structure (1).

2. The new and old asphalt pavement lap joint structure according to claim 1, further comprising a first fiberglass geogrid layer (26), wherein the first fiberglass geogrid layer (26) is laid between the emulsified asphalt permeable layer (22) and the coarse asphalt concrete layer (23).

3. The new and old asphalt pavement overlapping structure as claimed in claim 2, wherein the first glass fiber geogrid layer (26) partially covers the emulsified asphalt permeable layer (22), and one end of the first glass fiber geogrid layer (26) abuts against the overlapping surface (11).

4. The new and old asphalt pavement lap joint structure according to claim 3, further comprising a second fiberglass geogrid layer (27), wherein the second fiberglass geogrid layer (27) is laid between the modified emulsified asphalt binder layer (24) and the fine-grained asphalt concrete layer (25).

5. The new and old asphalt pavement lap joint structure according to claim 4, wherein the second fiberglass geogrid layer (27) partially covers the modified emulsified asphalt binder layer (24), and the second fiberglass geogrid layer (27) extends to cover the old pavement structure (1).

6. A new and old asphalt pavement lap construction method for constructing a new and old asphalt pavement lap structure according to any one of claims 1 to 5, comprising the steps of:

s1, milling the old pavement structure (1) to form a step-shaped lapping surface (11);

s2, paving a cement stabilized rubble layer (21) on the roadbed (100) to the highest horizontal plane covering the lapping surface (11);

s3, paving an emulsified asphalt permeable layer (22) on the cement stabilized gravel layer (21);

s4, paving a first glass fiber geogrid layer (26) on the emulsified asphalt permeable layer (22);

s5, paving a coarse-grained asphalt concrete layer (23) on the emulsified asphalt permeable layer (22) and the first glass fiber geogrid layer (26);

s6, paving a modified emulsified asphalt adhesive layer (24) on the coarse-grained asphalt concrete layer (23);

s7, laying a second glass fiber geogrid layer (27) on the modified emulsified asphalt adhesive layer (24);

s8, paving a fine particle type asphalt concrete layer (25) on the modified emulsified asphalt adhesive layer (24) and the second glass fiber geogrid layer (27).

7. The new and old asphalt pavement lap construction method according to claim 6, characterized in that the old pavement structure (1) is cleaned before being milled and the milled lap surface (11) is cleaned.

8. The new and old asphalt pavement overlapping construction method according to claim 6, wherein the first fiberglass geogrid layer (26) is installed before the emulsified asphalt permeable layer (22) is broken, one end of the first fiberglass geogrid layer (26) is fixed through a fixer, the other end of the first fiberglass geogrid layer is laid through mechanical or manual tensioning, and after the laying is completed, the other end of the first fiberglass geogrid layer (26) is fixed through the fixer.

9. The new and old asphalt pavement overlapping construction method according to claim 6, wherein the second glass fiber geogrid layer (27) is installed before the modified emulsified asphalt adhesive layer (24) is broken, one end of the second glass fiber geogrid layer (27) is fixed through a fixer, the other end of the second glass fiber geogrid layer (27) is laid through mechanical or manual tensioning, and after the laying is completed, the other end of the second glass fiber geogrid layer (27) is fixed through the fixer.

10. The new and old asphalt pavement lap construction method according to claim 6, characterized in that the upper surface of the coarse-grained asphalt concrete layer (23) is flush with the upper surface of the old pavement structure (1).

Technical Field

The invention relates to the field of pavement construction, in particular to a new and old asphalt pavement lap joint structure and a construction method.

Background

Along with the development of social economy, the demand of municipal roads is increasing day by day, the municipal roads constructed in the early stage are difficult to meet the growth of modern traffic and the demand of the development of social economy nowadays, and in order to solve the phenomenon, two ways are usually adopted, namely, a new road is built, and the original road is widened and modified. Because the investment of a newly-built road is huge and the economic benefit needs to be checked, a road widening mode is adopted at the present stage, and the method for widening the road is an economic and effective method. However, in the process of road widening, the lap joint of the new and old road surfaces cannot be embedded, compacted and compacted as the hot mixed material is molded, so that the lap joint is low in compaction degree, serious in water seepage and easy to damage to a certain extent after rainwater enters.

Disclosure of Invention

Based on the problems, the invention aims to provide a new and old asphalt pavement lap joint structure, which can improve the pavement splicing compactness of new and old roads and reduce the water seepage risk.

Based on the above problems, the invention also aims to provide a new and old asphalt pavement lap joint construction method, which can improve the pavement splicing compactness of new and old roads and reduce the water seepage risk.

In order to achieve the purpose, the invention adopts the following technical scheme:

a new and old asphalt pavement lap joint structure comprising:

the old pavement structure is provided with a step-shaped lapping surface;

new road surface structure, including cement stabilization rubble layer, emulsified asphalt layer, coarse grain formula asphalt concrete layer, modified emulsified asphalt adhesive layer and the fine grain formula asphalt concrete layer that sets gradually from bottom to top, cement stabilization rubble layer emulsified asphalt layer with coarse grain formula asphalt concrete layer all with the faying surface pastes and leans on, modified emulsified asphalt adhesive layer with fine grain formula asphalt concrete layer extends to cover to the upper surface of old road surface structure.

The preferable scheme of the new and old asphalt pavement lap joint structure further comprises a first glass fiber geogrid layer, wherein the first glass fiber geogrid layer is laid between the emulsified asphalt permeable layer and the coarse-grained asphalt concrete layer.

As a preferable scheme of the new and old asphalt pavement overlapping structure, the first glass fiber geogrid layer partially covers the emulsified asphalt permeable layer, and one end of the first glass fiber geogrid layer is attached to the overlapping surface.

The preferable scheme of the new and old asphalt pavement lap joint structure further comprises a second glass fiber geogrid layer, wherein the second glass fiber geogrid layer is laid between the modified emulsified asphalt adhesive layer and the fine-grain asphalt concrete layer.

As a preferable scheme of the new and old asphalt pavement lap joint structure, the second glass fiber geogrid layer partially covers the modified emulsified asphalt adhesive layer, and the second glass fiber geogrid layer extends to cover above the old asphalt pavement structure.

A new and old asphalt pavement lap construction method is used for constructing the new and old asphalt pavement lap structure, and comprises the following steps:

s1, milling the old pavement structure to form a step-shaped lapping surface;

s2, paving a cement stabilized rubble layer on the roadbed to the highest horizontal plane covering the lapping surface;

s3, paving an emulsified asphalt permeable layer on the cement stabilized gravel layer;

s4, paving a first glass fiber geogrid layer on the upper part of the emulsified asphalt permeable layer;

s5, paving a coarse-grained asphalt concrete layer on the emulsified asphalt permeable layer and the first glass fiber geogrid layer;

s6, paving a modified emulsified asphalt adhesive layer on the coarse-grained asphalt concrete layer;

s7, laying a second glass fiber geogrid layer on the modified emulsified asphalt adhesive layer;

s8, laying a fine particle type asphalt concrete layer on the modified emulsified asphalt adhesive layer and the second glass fiber geogrid layer.

As a preferred scheme of the new and old asphalt pavement lap construction method, the old pavement structure is cleaned before being milled, and the milled lap surface is cleaned.

As a preferred embodiment of the new and old asphalt pavement lap joint construction method of the present invention, the first glass fiber geogrid layer needs to be installed before the emulsified asphalt permeable layer is broken, one end of the first glass fiber geogrid layer is fixed by a fixer, the other end of the first glass fiber geogrid layer is laid by mechanical or manual tensioning, and after the laying is completed, the other end of the first glass fiber geogrid layer is fixed by the fixer.

As a preferred scheme of the new and old asphalt pavement lap joint construction method, the second glass fiber geogrid layer needs to be installed before the modified emulsified asphalt adhesive layer is broken, one end of the second glass fiber geogrid layer is fixed through a fixer, the other end of the second glass fiber geogrid layer is paved through mechanical or manual tensioning, and after paving is completed, the other end of the second glass fiber geogrid layer is fixed through the fixer.

As a preferred scheme of the new and old asphalt pavement lap joint construction method, the upper surface of the coarse-grained asphalt concrete layer is flush with the upper surface of the old pavement structure.

The invention has the beneficial effects that:

the invention provides a new and old asphalt pavement lap joint structure, wherein the old pavement structure is provided with a step-shaped lap joint surface, the new pavement structure comprises a cement stabilized gravel layer, an emulsified asphalt permeable layer, a coarse grain type asphalt concrete layer, a modified emulsified asphalt adhesive layer and a fine grain type asphalt concrete layer which are sequentially arranged from bottom to top, the cement stabilized gravel layer, the emulsified asphalt permeable layer and the coarse grain type asphalt concrete layer are attached to the lap joint surface, and the modified emulsified asphalt adhesive layer and the fine grain type asphalt concrete layer extend to cover the upper surface of the old pavement structure. The new and old asphalt pavement lap joint structure provided by the invention not only can increase the compactness of the new and old pavement lap joint, but also can play a great role in waterproofing of pavement structure engineering.

The invention provides a new and old asphalt pavement lap joint construction method, which comprises the steps of milling and planing an old pavement structure to form a step-shaped lap joint surface, paving a cement stable gravel layer on a roadbed to the highest horizontal plane covering the lap joint surface, paving an emulsified asphalt permeable layer on the cement stable gravel layer, paving a first glass fiber geogrid layer on the emulsified asphalt permeable layer, paving a coarse-grained asphalt concrete layer on the emulsified asphalt permeable layer and the first glass fiber geogrid layer, paving a modified emulsified asphalt adhesive layer on the coarse-grained asphalt concrete layer, paving a second glass fiber geogrid layer on the modified emulsified asphalt adhesive layer, and paving a fine-grained asphalt concrete layer on the modified emulsified asphalt adhesive layer and the second glass fiber geogrid layer. The construction method for overlapping the new and old asphalt pavements provided by the invention not only can increase the compaction degree of the overlapped part of the new and old asphalt pavements, but also can play a great role in waterproofing of pavement structure engineering.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a new and old asphalt pavement lap joint structure provided by an embodiment of the present invention;

fig. 2 is a schematic flow chart of a new and old asphalt pavement lap construction method according to an embodiment of the present invention.

In the figure:

1-old pavement structure; 11-a faying surface;

2-new road surface structure; 21-cement stabilized gravel layer; 22-emulsified asphalt permeable layer; 23-coarse asphalt concrete layer; 24-modified emulsified asphalt adhesive layer; 25-fine particle asphalt concrete layer; 26-a first fiberglass geogrid layer; 27-a second fiberglass geogrid layer;

100-roadbed.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides a new and old asphalt pavement lap joint structure, as shown in fig. 1, which includes an old pavement structure 1 and a new pavement structure 2. Wherein, old road surface structure 1 is provided with step-like faying surface 11, new road surface structure 2 includes cement stabilization rubble layer 21 that sets gradually from bottom to top, emulsified asphalt priming coat 22, coarse grain formula asphalt concrete layer 23, modified emulsified asphalt binder coat 24 and fine grain formula asphalt concrete layer 25, cement stabilization rubble layer 21, emulsified asphalt priming coat 22 and coarse grain formula asphalt concrete layer 23 all paste with faying surface 11 and lean on, modified emulsified asphalt binder coat 24 and fine grain formula asphalt concrete layer 25 extend to cover to old road surface structure 1's upper surface. The overlapping surface 11 is arranged to be step-shaped, which is beneficial to increasing the contact area of the overlapping part of the old pavement structure 1 and the new pavement structure 2. Milling is mainly performed for the upper layer of the old road structure 1, while the lower layer of the old road structure 1 is still utilized.

In order to reduce reflection cracks and uneven settlement, the new and old asphalt pavement overlapping structure optionally further comprises a first glass fiber geogrid layer 26, and the first glass fiber geogrid layer 26 is laid between the emulsified asphalt permeable layer 22 and the coarse-grained asphalt concrete layer 23. Optionally, the first glass fiber geogrid layer 26 partially covers the emulsified asphalt permeable layer 22, and one end of the first glass fiber geogrid layer 26 abuts against the faying surface 11. By laying the first glass fiber geogrid layer 26, the strength of the lap joint part of the old pavement structure 1 and the new pavement structure 2 is enhanced, and the overall deformation resistance of the roadbed 100 is improved.

In order to reduce reflection cracks and uneven settlement, the new and old asphalt pavement overlapping structure optionally further comprises a second glass fiber geogrid layer 27, and the second glass fiber geogrid layer 27 is laid between the modified emulsified asphalt binder layer 24 and the fine-grained asphalt concrete layer 25. Optionally, the second glass fiber geogrid layer 27 partially covers the modified emulsified asphalt adhesive layer 24, and the second glass fiber geogrid layer 27 extends to cover the old pavement structure 1. By laying the second glass fiber geogrid layer 27, the strength of the lap joint part of the old pavement structure 1 and the new pavement structure 2 is enhanced, and the overall deformation resistance of the roadbed 100 is improved.

The new and old bituminous pavement lap joint structure that this embodiment provided not only can increase the degree of compaction of new and old road surface overlap joint department, also can play very big effect to road surface structural engineering is waterproof moreover.

The embodiment also provides a new and old asphalt pavement overlapping construction method, as shown in fig. 2, the new and old asphalt pavement overlapping construction method is used for constructing the new and old asphalt pavement overlapping structure, and comprises the following steps:

s1, milling the old pavement structure 1 to form a step-shaped lapping surface 11;

s2, paving the cement stabilized gravel layer 21 on the roadbed 100 to the highest horizontal plane covering the lapping surface 11;

s3, paving an emulsified asphalt permeable layer 22 on the cement stabilized gravel layer 21;

s4, laying a first glass fiber geogrid layer 26 on the emulsified asphalt permeable layer 22;

s5, paving a coarse-grained asphalt concrete layer 23 on the emulsified asphalt permeable layer 22 and the first glass fiber geogrid layer 26;

s6, paving a modified emulsified asphalt adhesive layer 24 on the coarse-grained asphalt concrete layer 23;

s7, laying a second glass fiber geogrid layer 27 on the upper part of the modified emulsified asphalt adhesive layer 24;

s8, laying a fine-grained asphalt concrete layer 25 on the modified emulsified asphalt adhesive layer 24 and the second glass fiber geogrid layer 27.

In order to ensure the quality of the overlap, the old road structure 1 is optionally cleaned before being milled and the milled overlap surface 11 is cleaned. To level the pavement, optionally the upper surface of the coarse-grained asphalt concrete layer 23 is flush with the upper surface of the old pavement structure 1.

In order to avoid the wrinkles or folding of the first glass fiber geogrid layer 26, optionally, the first glass fiber geogrid layer 26 needs to be installed before the emulsified asphalt permeable layer 22 is broken, one end of the first glass fiber geogrid layer 26 is fixed through a fixer, the other end of the first glass fiber geogrid layer 26 is laid through mechanical or manual tensioning, and after the laying is completed, the other end of the first glass fiber geogrid layer 26 is fixed through the fixer, so that the first glass fiber geogrid layer 26 is kept in a slightly tight state.

In order to avoid the second glass fiber geogrid layer 27 from being folded or folded, optionally, the second glass fiber geogrid layer 27 needs to be installed before the modified emulsified asphalt adhesive layer 24 is broken, one end of the second glass fiber geogrid layer 27 is fixed through a fixer, the other end of the second glass fiber geogrid layer 27 is laid through mechanical or manual tensioning, and after the laying is completed, the other end of the second glass fiber geogrid layer 27 is fixed through the fixer.

The new and old asphalt pavement lap construction method provided by the embodiment can not only increase the compactness of the new and old pavement lap joint, but also play a great role in waterproofing of pavement structure engineering.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.