CN-122013632-A - Pavement arch expansion treatment device and embedding method

CN122013632ACN 122013632 ACN122013632 ACN 122013632ACN-122013632-A

Abstract

The application belongs to the field of road engineering, and relates to a pavement arch expansion treatment device and a burying method. The pavement arch expansion treatment device comprises a telescopic layer, a filling layer, a protective layer and a fixing piece. The telescopic layer is filled in a first gap in the cement base layer, the filling layer is filled in a second gap in the asphalt surface layer, the filling layer comprises a backfill layer and a covering layer, the protective layer covers above the first gap, the fixing pieces comprise a first fixing piece and a second fixing piece which are connected with each other, the first fixing piece is located between the filling layer and the asphalt surface layer, and the second fixing piece is located between the filling layer and the cement base layer and connected to the cement base layer. In the application, the covering layer material comprises polyurethane, the backfill layer material comprises modified asphalt mixture, and the double-layer design of the filling layer ensures that the pavement arch expansion treatment device has good expansion rebound performance of asphalt materials, good deformation adaptability, impact resistance, corrosion resistance and waterproof performance of polyurethane materials.

Inventors

HE ZHONGMING
CAI JUN
DENG RUI
ZHANG GUOQI
YU FENG
LI YIWEI
LI XI
ZHANG XULIANG
CHEN ZHIZHONG
GAO JIAN
QI QI
PAN FUYUAN

Assignees

长沙理工大学
内蒙古交通集团蒙通养护有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260204

Claims (10)

1. The pavement arch expansion treatment device is characterized by comprising a telescopic layer, a filling layer, a protective layer and a fixing piece; The telescopic layer is filled in a first gap in the cement base layer so that the first gap can be deformed in a telescopic way; The filling layer is filled in a second gap in the asphalt surface layer, the filling layer comprises a backfill layer and a covering layer, and the covering layer is positioned above the backfill layer; the protective layer covers the first gap, and the backfill layer is positioned above the cement base layer and the protective layer; The fixing members include a first fixing member and a second fixing member connected to each other, the first fixing member being located between the filling layer and the asphalt layer, and the second fixing member being located between the filling layer and the cement base layer and connected to the cement base layer.
2. The pavement marking device of claim 1, wherein the telescoping layer comprises a foam sheet that fills the first gap and has an upper surface that is flush with an upper surface of the cement base layer.
3. The pavement arch expansion treatment device according to claim 1, wherein the thickness of the backfill layer is the sum of the thicknesses of a middle layer and a lower layer of the asphalt surface layer, the material of the backfill layer comprises a modified asphalt mixture, the modified asphalt mixture comprises graded broken stone, modified asphalt and coarse sand, the graded broken stone accounts for 70-80% of the modified asphalt mixture by mass, the modified asphalt accounts for 12-18% of the modified asphalt mixture by mass, and the coarse sand accounts for 8-12% of the modified asphalt mixture by mass.
4. A pavement arch treatment apparatus according to claim 3, wherein the graded broken stone accounts for 75% by mass of the modified asphalt mixture, the modified asphalt accounts for 15% by mass of the modified asphalt mixture, and the coarse sand accounts for 10% by mass of the modified asphalt mixture.
5. The pavement arch expansion treatment device according to claim 3, wherein the modified asphalt comprises the following raw materials, by mass, 80-120 parts of matrix asphalt, 2-10 parts of SBS modifier, 15-25 parts of rubber powder, 2-8 parts of anti-rutting agent and 10-20 parts of light oil.
6. The pavement arch treatment apparatus according to claim 3, wherein the modified asphalt comprises the following raw materials, by mass, 100 parts of matrix asphalt, 7 parts of SBS modifier, 20 parts of rubber powder, 5 parts of anti-rutting agent and 15 parts of light oil.
7. The pavement marking apparatus of claim 1, wherein the material of the cover layer comprises polyurethane, the thickness of the cover layer is the same as the thickness of the upper layer of asphalt pavement, and the upper surface of the cover layer is flush with the upper surface of the asphalt pavement.
8. The pavement arch treatment apparatus according to claim 1, wherein the protective layer has a width greater than a width of the first gap such that the protective layer covers the first gap, the protective layer being fixedly connected to the telescoping layer by bolts.
9. The pavement arch treatment apparatus according to claim 1, wherein the fixing members are symmetrically arranged at both sides of the backfill layer and fixedly connected with the cement-based layer by bolts.
10. A method of burying a pavement arch treatment apparatus according to any one of claims 1 to 9, comprising the steps of: s1, digging out an asphalt surface layer and a cement base layer of a pavement arch expansion area, so that the width of a second gap in the asphalt surface layer is larger than that of a first gap in the cement base layer; S2, filling the telescopic layer into the first gap, so that the thickness of the telescopic layer is smaller than the height of the first gap, and the upper surface of the telescopic layer is flush with the upper surface of the cement base layer; S3, covering the protective layer above the first gap, and fixing the protective layer and the telescopic layer by using screws; S4, the first fixing piece is tightly attached to the side wall of the second gap and is arranged above the cement base layer, and the second fixing piece is fixed with the cement base layer; And S5, sequentially filling the backfill layer and the covering layer into the second gap to finish the burying operation of the pavement arch expansion treatment device.

Description

Pavement arch expansion treatment device and embedding method Technical Field The application relates to the field of road engineering, in particular to a pavement arch expansion treatment device and a burying method. Background In the expressway maintenance process of the desert gobi saline soil area with large temperature difference in the inner Mongolia autonomous region, the problem that the road surface is frequently arched and distended is found, driving safety is endangered, the service performance and the road service life of the road surface are seriously influenced, and the development of local transportation and economy and society is restricted. In the present stage, aiming at slight arch expansion diseases, milling and planing treatment is mostly adopted at the arch expansion position of the 'emergency' asphalt surface, and for severe arch expansion diseases, pavement is adopted to excavate to a cement base layer, asphalt surface layers and cement base layer materials within a certain width and depth range of arch expansion are cut off, and then asphalt mixture is backfilled for treatment. However, through two-three years of operation observation, new arch expansion can still be generated at the original road surface arch expansion position, and the road surface is induced to be broken and cracked in a large area, so that the exertion of the road access performance is severely restricted, and great hidden danger is brought to traffic safety. The pavement arch expansion causes are analyzed, and the cement base layer at the lower part of the asphalt surface layer is found that under the long-term effects of temperature, moisture and salt, the cement stability is insufficient, so that the volume expansion of the cement base layer plate body is caused, and the generated transverse extrusion stress exceeds the limit, so that the cement base layer plate body is vertically raised, and the pavement arch is expanded and cracked. If the road surface is not treated in time, the road surface is damaged seriously and the traffic capacity is lost under the actions of vehicle load, temperature difference change and moisture. The existing pavement arch expansion part is directly milled and scraped and cannot fundamentally eliminate arch expansion, and the asphalt surface layer and the cement base layer are backfilled after being excavated, so that the volume expansion can be relieved to a certain extent, but the backfill asphalt mixture has weaker bearing capacity, pavement subsidence is easy to be induced, and the reverse composite arch expansion is easy to be induced if high-strength material is adopted for backfilling. Disclosure of Invention In view of the above-mentioned drawbacks of the prior art, the present application aims to provide a pavement arch expansion treatment device and a burying method, which can provide a compression deformation space when a cement base layer is expanded and deformed, and can bear a vehicle load, ensure the road passing comfort, and solve the problem of pavement arch expansion. In one aspect, the application provides a pavement arch expansion treatment device, which comprises a telescopic layer, a filling layer, a protective layer and a fixing piece; The telescopic layer is filled in a first gap in the cement base layer so that the first gap can be deformed in a telescopic way; The filling layer is filled in a second gap in the asphalt surface layer, the filling layer comprises a backfill layer and a covering layer, and the covering layer is positioned above the backfill layer; the protective layer covers the first gap, and the backfill layer is positioned above the cement base layer and the protective layer; The fixing members include a first fixing member and a second fixing member connected to each other, the first fixing member being located between the filling layer and the asphalt layer, and the second fixing member being located between the filling layer and the cement base layer and connected to the cement base layer. In an alternative embodiment, the telescoping layer comprises a foam sheet that fills the first gap and has an upper surface that is flush with an upper surface of the cementitious base layer. In an optional embodiment, the thickness of the backfill layer is the sum of the thicknesses of the middle layer and the lower layer of the asphalt surface layer, the material of the backfill layer comprises a modified asphalt mixture, the modified asphalt mixture comprises graded broken stone, modified asphalt and coarse sand, the graded broken stone accounts for 70-80% of the modified asphalt mixture by mass, the modified asphalt accounts for 12-18% of the modified asphalt mixture by mass, and the coarse sand accounts for 8-12% of the modified asphalt mixture by mass. In an alternative embodiment, the graded broken stone accounts for 75% of the modified asphalt mixture by mass, the modified asphalt accounts for 15% of the modified asphalt mixture by mass, and