Preventive maintenance structure for highway asphalt pavement

Abstract

The utility model discloses a road asphalt pavement preventive maintenance structure which comprises tamped plain soil and a middle surface layer, the middle surface layer is arranged at the upper end of the tamped plain soil, the middle surface layer is made of AC-60mm asphalt concrete with a waterproof function, the lower ends of the edges of the two sides of the middle surface layer are fixedly connected with water retaining seats, and the lower ends of the water retaining seats are inserted into the tamped plain soil; according to the preventive maintenance structure for the road asphalt pavement, the two water retaining seats and the middle surface layer are combined for use and are used for covering the upper end of the rammed plain soil at the lower end of the middle surface layer, so that rainwater and part of underground water are effectively prevented from permeating into the rammed plain soil at the lower end of the middle surface layer, and the purpose of preventing the rammed plain soil at the lower end of the middle surface layer from losing is achieved; subsidence or collapse caused by loss of soil below the pavement is avoided, so that the service life of the pavement is prolonged to delay expensive overhaul and reconstruction activities.

Description

Technical Field

[0001] The utility model relates to the technical field of road subsidence, in particular to a preventive maintenance structure for a highway asphalt road surface. Background Art

[0002] On asphalt roads, road subsidence or collapse is often seen; the main cause of subsidence and road collapse is that rainwater or groundwater has long infiltrated the soil, which dilutes the surrounding soil and causes soil loss, thereby reducing the soil supporting the asphalt road surface above, causing the soil to slowly sink or suddenly collapse;

[0003] This paper aims to propose a preventive maintenance structure for preventing soil erosion and avoiding subsidence or collapse caused by loss of soil beneath the road surface. Utility Model Content

[0004] The utility model aims to solve the problem of road surface collapse that can often be seen on asphalt roads in the prior art, and proposes a preventive maintenance structure for asphalt road surfaces.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A preventive maintenance structure for an asphalt road surface, comprising compacted soil and a middle surface layer, wherein the middle surface layer is arranged on the upper end of the compacted soil, and the middle surface layer is made of AC-60mm asphalt concrete with waterproof function;

[0007] The lower ends of the two side edges of the middle surface layer are fixedly connected with water retaining seats, and the lower ends of the water retaining seats are inserted into the compacted soil. The two water retaining seats and the middle surface layer are used in combination to cover the upper end of the compacted soil at the lower end of the middle surface layer, effectively reducing the penetration of rainwater into the compacted soil at the lower end of the middle surface layer, thereby achieving the purpose of preventing the loss of the compacted soil at the lower end of the middle surface layer.

[0008] Preferably, the middle of the upper end surface of the middle surface layer is convex upward, and the two sides are gradually inclined downward, so as to guide the rainwater above to be discharged to the two sides.

[0009] Preferably, the upper end of the middle surface layer is fixedly connected to the upper surface layer, and the upper surface layer is made of permeable asphalt.

[0010] Preferably, the area between the compacted soil and the middle surface layer is filled with a cushion layer, a subbase layer, an upper base layer, and a lower layer in sequence from bottom to top.

[0011] Preferably, a plurality of stone piles arranged in a matrix are inserted into the compacted soil, the cushion layer, the subbase layer and the upper base layer.

[0012] Preferably, a wear layer is provided on the upper end surface of the upper layer.

[0013] Compared with the prior art, the utility model provides a preventive maintenance structure for highway asphalt pavement, which has the following beneficial effects:

[0014] 1. The preventive maintenance structure of the asphalt pavement of the highway is used in combination with two water retaining seats and the middle surface layer to cover the upper end of the compacted soil at the lower end of the middle surface layer, effectively reducing the infiltration of rainwater and part of groundwater into the compacted soil at the lower end of the middle surface layer, so as to prevent the loss of the compacted soil at the lower end of the middle surface layer, avoid the subsidence or collapse caused by the loss of soil under the road surface, thereby extending the service life of the road surface to postpone expensive overhaul and reconstruction activities.

[0015] 2. The preventive maintenance structure of the asphalt pavement of the highway uses the upper layer made of permeable asphalt to quickly penetrate the rainwater on the road surface downward into the upper surface of the discharge middle layer, and the middle of the upper end surface of the middle layer is convex upward, and the two sides are gradually inclined downward, which quickly guides the upper rainwater to both sides for discharge, reducing the vehicle slippage caused by rainwater on the upper layer.

[0016] 3. The preventive maintenance structure of the asphalt pavement of the highway can keep the road surface smooth by regularly laying a wear layer on the upper layer to prevent the continuous deterioration of the road surface with declining quality. It can also resist skidding and have a certain correction effect on the contour of the road surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a preventive maintenance structure for a highway asphalt pavement proposed by the utility model;

[0018] Figure 2 The utility model is a cross-sectional view of a preventive maintenance structure for a highway asphalt pavement.

[0019] In the figure: 1. compacted soil; 2. water retaining seat; 3. stone piles; 4. cushion layer; 5. subbase layer; 6. upper base layer; 7. lower layer; 8. middle surface layer; 9. upper layer; 10. wearing layer. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] Reference Figure 1-2 A preventive maintenance structure for an asphalt pavement of a highway comprises a compacted soil 1, and water retaining seats 2 are pre-buried on both sides of the compacted soil 1, that is, the lower ends of the water retaining seats 2 are stably inserted into the compacted soil 1, and the lower ends of the two water retaining seats 2 can prevent groundwater from penetrating from the sides into the compacted soil 1 between the two water retaining seats 2, thereby maintaining the mechanical strength of the compacted soil 1. The periphery of the water retaining seat 2 is also provided with a compacted soil body or a stone pestle as a shoulder for supporting the water retaining seat 2. The water retaining seat 2 is composed of reinforced concrete stones with a waterproof function, which can block rainwater and groundwater. The upper end cross-section of the water retaining seat 2 is an isosceles trapezoid, and the width gradually decreases from bottom to top.

[0023] In this embodiment, the top of the compacted soil 1 between the two water retaining seats 2 is filled with a cushion layer 4, a subbase layer 5, an upper base layer 6, and a lower layer 7 in sequence. The cushion layer 4 is composed of 150mm graded gravel, which is compacted and laid flat on the compacted soil 1. The subbase layer 5 is composed of 200mm lime-stabilized soil, which is compacted and laid flat on the upper surface of the cushion layer 4. The upper base layer 6 is composed of 200mm cement-stabilized gravel. The upper base layer 6 is formed by laying 200mm gravel flat and compacted on the upper surface of the subbase layer 5, and then pouring cement to connect the gravel. The lower layer 7 is composed of AC-80mm asphalt concrete, which is poured and fixedly adhered to the upper surface of the upper base layer 6.

[0024] In this embodiment, a middle surface layer 8 is cast and paved on the upper surface of the lower layer 7. The middle surface layer 8 is made of AC-60mm asphalt concrete with waterproof function. The lower ends of the two side edges of the middle surface layer 8 are fixedly connected to the two ends of the two water retaining seats 2. The two water retaining seats 2 and the middle surface layer 8 are used in combination to cover the upper end of the compacted soil 1 at the lower end of the middle surface layer 8, effectively reducing the penetration of rainwater into the compacted soil 1 at the lower end of the middle surface layer 8, thereby preventing the loss of the compacted soil 1 at the lower end of the middle surface layer 8, avoiding subsidence or collapse caused by the loss of soil under the road surface, thereby extending the service life of the road surface to postpone expensive overhauls and reconstruction activities.

[0025] It should be added that the middle of the upper surface of the middle surface layer 8 is convex upward, and the two sides are gradually inclined downward, which is used to guide the rainwater above to be discharged to the two sides, that is, the rainwater on the middle surface layer 8 is discharged to the two sides along the upper surface, and drainage grooves can also be installed at the lower ends of both sides of the middle surface layer 8 to discharge the rainwater in a centralized manner. The drainage grooves can be pre-buried in the soil close to the water retaining seat 2, and the upper end opening of the drainage grooves can be no higher than the edges of both sides of the middle surface layer 8, so that the drainage grooves can collect rainwater on the middle surface layer 8 and support the outer wall of the water retaining seat 2. The upper end of the middle surface layer 8 is fixedly connected to the upper layer 9, which is made of permeable asphalt and is used to quickly penetrate and discharge rainwater on the road surface downward, thereby reducing vehicle slippage caused by rainwater.

[0026] In this embodiment, a wear layer 10 is provided on the upper end surface of the upper layer 9. The wear layer 10 is composed of a hot asphalt mixture with a water-permeable function. The wear layer 10 is a layer of hot asphalt mixture regularly laid on the crude oil road surface of the upper layer 9. The thickness is kept at 1-3 cm for the best. It can keep the road surface flat to prevent the continuous deterioration of the road surface with declining quality, and it can also resist skidding and have a certain correction effect on the contour of the road surface.

[0027] In this embodiment, a plurality of stone piles 3 arranged in a matrix are inserted in the compacted soil 1, the cushion layer 4, the subbase layer 5 and the upper base layer 6. The stone piles 3 are made of concrete and can be pre-buried or later made by a compactor. The lower end is inserted deep into the compacted soil 1, and the upper end is fixedly connected with 200 mm crushed stones in the upper base layer 6 by cement. Figure 2 After the upper middle end of the compacted soil 1 is partially infiltrated and lost by groundwater, the lower end of the stone pile 3 can still be supported on the soil below to support the upper base layer 6, eliminating highway diseases and safety hazards before they occur, which is beneficial to extending the service life of the highway.

[0028] The utility model discloses a preventive maintenance structure for an asphalt road surface. When the preventive maintenance structure is used, two water retaining seats 2 and a middle surface layer 8 are used in combination to cover the upper end of the compacted soil 1 at the lower end of the middle surface layer 8, effectively reducing the penetration of rainwater and part of groundwater into the compacted soil 1 at the lower end of the middle surface layer 8, thereby preventing the loss of the compacted soil 1 at the lower end of the middle surface layer 8, and avoiding the sinking or collapse caused by the loss of the soil under the road surface, thereby extending the service life of the road surface to postpone expensive overhaul and reconstruction activities.

[0029] The upper layer 9 made of permeable asphalt quickly infiltrates the rainwater on the road surface into the upper surface of the middle layer 8 for discharge, and the middle of the upper end surface of the middle layer 8 is convex upward, and the two sides are gradually inclined downward, so as to quickly guide the rainwater from above to both sides for discharge, thereby reducing the slipping of vehicles on the upper layer 9 due to rainwater, and regularly laying a wear layer 10 on the upper layer 9 to keep the road surface flat and prevent the continuous deterioration of the road surface with declining quality. It can also be anti-skid and have a certain correction effect on the contour of the road surface.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A preventive maintenance structure for an asphalt road surface, comprising compacted soil (1) and a middle surface layer (8), wherein the middle surface layer (8) is arranged on the upper end of the compacted soil (1), and is characterized in that: The middle surface layer (8) is made of AC-60mm asphalt concrete with waterproof function; The lower ends of both side edges of the middle surface layer (8) are fixedly connected with water retaining seats (2), and the lower ends of the water retaining seats (2) are inserted into the compacted soil (1). The two water retaining seats (2) and the middle surface layer (8) are used in combination to cover the upper end of the compacted soil (1) at the lower end of the middle surface layer (8), thereby effectively reducing the penetration of rainwater into the compacted soil (1) at the lower end of the middle surface layer (8), thereby achieving the purpose of preventing the loss of the compacted soil (1) at the lower end of the middle surface layer (8).

2. A preventive maintenance structure for highway asphalt pavement according to claim 1, characterized in that: The middle of the upper end surface of the middle surface layer (8) is convex upward, and the two sides are gradually inclined downward, so as to guide the rainwater above to be discharged to the two sides.

3. A preventive maintenance structure for highway asphalt pavement according to claim 1, characterized in that: The upper end of the middle surface layer (8) is fixedly connected to the upper surface layer (9), and the upper surface layer (9) is made of permeable asphalt.

4. A preventive maintenance structure for highway asphalt pavement according to claim 1, characterized in that: The area between the compacted soil (1) and the middle surface layer (8) is filled with a cushion layer (4), a bottom base layer (5), an upper base layer (6), and a lower layer (7) in sequence from bottom to top.

5. A preventive maintenance structure for highway asphalt pavement according to claim 4, characterized in that: A plurality of stone piles (3) arranged in a matrix are inserted into the compacted soil (1), the cushion layer (4), the subbase layer (5) and the upper base layer (6).

6. A preventive maintenance structure for highway asphalt pavement according to claim 3, characterized in that: A wear layer (10) is provided on the upper end surface of the upper layer (9).

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