Pavement repairing mortar layer structure

Abstract

The utility model relates to a pavement patching mortar layer structure which comprises a pavement base layer, a bonding layer, precast blocks, a geotechnical cloth layer and a new pavement layer, a plurality of foundation trenches are formed in the pavement base course in the extending direction of a road at intervals in the left-right direction; the bonding layer is laid in the pavement base layer and the foundation trench; the lower parts of the precast blocks are distributed and fixed in the foundation trench through a bonding layer, and the upper parts of the precast blocks upwards extend out of the foundation trench; the geotechnical cloth layer is uniformly paved and fixed on the bonding layer and the precast blocks, and bulges are formed at the precast blocks; and the new pavement layer is paved and fixed on the geotechnical cloth layer. The lower parts of the precast blocks are distributed and fixed in the foundation trench through the bonding layer, and the upper parts of the precast blocks upwards extend out of the foundation trench, so that the problems that the repaired new and old pavements are not firmly bonded and are easy to fall off can be effectively solved, the adhesive force of the new layer of the pavements is enhanced, and the new layer of the pavements is prevented from falling off; the geotechnical cloth layer can enable all the precast blocks to form stress connection, and local interlayer falling caused by local stress of a new layer of the road surface is prevented.

Description

Technical Field

[0001] This utility model relates to the field of road construction technology, specifically to a road surface repair mortar layer structure. Background Technology

[0002] With the rapid development of China's social economy, the construction of cement concrete pavements for urban and rural roads is progressing rapidly. Currently, domestic road traffic volume is growing rapidly, traffic loads are becoming increasingly heavy, and vehicle overloading is becoming more serious, leading to a significant increase in damage to cement concrete pavements. Especially on lower-grade roads, due to relatively outdated construction technology, the water-cement ratio of cement concrete cannot be accurately controlled, resulting in widespread road defects such as pitting, potholes, exposed aggregate, and peeling, requiring timely and effective repair and maintenance.

[0003] Currently, there are two main methods for repairing damaged cement concrete pavements on existing low-grade highways: one is to directly break up the damaged concrete slabs, remove waste materials, reinforce the base layer, and then pour new concrete slabs. This repair method is costly, has a long construction period, and affects highway operation. The other method is to lay an asphalt macadam overlay on the existing damaged pavement. This repair method also has drawbacks such as poor adhesion between the old and new surfaces and easy detachment. Currently, many people on the market are trying to use some high-strength mortar materials for thin-layer overlay repairs, but because the thin overlay layer does not adhere well to the original pavement and is brittle, it soon breaks, detaches, and falls off. Moreover, such mortars are too expensive, have poor wear resistance, and have significant limitations in construction. Therefore, all existing pavement repair structures suffer from the problem of poor adhesion between the old and new pavements after repair and easy detachment.

[0004] Therefore, it is necessary to study a road repair mortar layer structure. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a road repair mortar layer structure that can effectively solve the problems of poor adhesion and easy detachment of the new and old road surfaces after repair.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A road repair mortar layer structure includes a road base layer, an adhesive layer, precast blocks, a geotextile layer, and a new road layer;

[0008] The road base layer is provided with trenches along the road extension direction, and multiple trenches are spaced apart in the left-right direction;

[0009] The adhesive layer is laid in the road base and the foundation trench;

[0010] The lower part of the prefabricated block is distributed and fixed in the base groove through the adhesive layer, and the upper part of the prefabricated block extends out of the base groove upwardly;

[0011] The geotextile layer is uniformly laid and fixed on the adhesive layer and the prefabricated blocks, and forms a protrusion at the prefabricated blocks;

[0012] The pavement new layer is laid and fixed on the geotextile layer.

[0013] Further, the prefabricated block comprises a wedge part and an anchoring part, the wedge part is located in the base groove, and the cross section of the wedge part is a downwardly tapered trapezoidal shape; the anchoring part is fixed on the wedge part.

[0014] Further, the left and right side walls of the wedge part are both provided with overflow grooves which are spaced apart along the road extension direction, the upper end of the overflow groove is communicated to the outside of the base groove, and the lower end of the overflow groove is communicated to the inside of the base groove.

[0015] Further, the overflow groove is a trapezoidal groove with a top width and a bottom narrowness.

[0016] Further, the upper end face of the anchoring part is provided with a plurality of anchor holes which are spaced apart along the road extension direction, a pre-buried bar is vertically arranged in the anchor hole, and the pre-buried bar is pre-buried in the pavement new layer.

[0017] Further, the pavement new layer comprises an interface layer, a waterproof mortar layer, a structural layer and a wear-resistant surface layer which are laid in sequence from bottom to top.

[0018] Further, the geotextile layer adopts a polyester fiber geotextile, and the geotextile layer is a mesh structure which can be penetrated by the mortar used by the pavement new layer.

[0019] The beneficial effects of the above technical scheme are:

[0020] (1) The base groove along the road extension direction is formed on the pavement base layer, the lower part of the prefabricated block is distributed and fixed in the base groove through the adhesive layer, and the upper part of the prefabricated block extends out of the base groove upwardly, so that the contact area with the pavement new layer can be increased, and the anchoring effect can be formed, thereby effectively solving the problem that the repaired new and old pavements are not firmly bonded and are easy to fall off, so as to enhance the adhesion of the pavement new layer and prevent it from falling off.

[0021] (2) The geotextile layer is uniformly laid and fixed on the adhesive layer and the prefabricated blocks, so that the geotextile layer can not only improve the compression resistance of the road, but also form a force connection between the prefabricated blocks, and uniformly load, when the local prefabricated block is subjected to external force in the left and right directions, the prefabricated blocks in other areas can be pulled together to bear force through the geotextile layer, so as to prevent the pavement new layer from falling off due to local stress. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a sectional view of the utility model.

[0023] Figure 2 For Figure 1 the local enlarged view at A in FIG.

[0024] Figure 3 For the three-dimensional schematic view of the prefabricated block;

[0025] Figure 4 For Figure 3 the front view;

[0026] Figure 5 For Figure 4 the sectional view of B-B in FIG.

[0027] Reference: 1 is a road base layer, 2 is an adhesive layer, 3 is a prefabricated block, 4 is a geotextile layer, 5 is a new road surface layer, 6 is a pre-embedded reinforcing bar, 101 is a base groove, 301 is a wedge part, 302 is an anchoring part, 303 is a glue overflow groove, 304 is an anchor hole, 501 is an interface layer, 502 is a waterproof mortar layer, 503 is a structural layer, and 504 is a wear-resistant surface layer. DETAILED DESCRIPTION

[0028] The utility model will be described in further detail below in combination with the drawings and specific embodiments:

[0029] The embodiment aims to provide a road repair mortar layer structure, which is mainly used for road repair work and aims to solve the problem of poor adhesion and easy falling off of the new and old road surfaces after repair.

[0030] A road repair mortar layer structure, such as Figure 1 , comprises a road base layer 1, an adhesive layer 2, a prefabricated block 3, a geotextile layer 4, and a new road surface layer 5.

[0031] The road base layer 1 is the base layer surface after the old road is excavated and cleaned, and the broken stones, dust, oil stains, and loose substances of the original road surface need to be cleaned. At the same time, it is necessary to ensure that the road base layer is flat and clean and that its structure has no serious defects. If there are cracks or severely damaged areas, they need to be repaired. The repair method of the road base layer all adopts the prior art, which will not be described here.

[0032] The rectangular base groove 101 extending along the direction of the road is excavated on the road base layer, and a plurality of base grooves 101 are arranged at intervals along the left-right direction, which is the direction of the road to the two sides of the road.

[0033] The adhesive layer 2 is laid in the road base layer 1 and the base groove 101, and the adhesive layer 2 can adopt a polymer modified cement mortar, which is mainly used for adhering and fixing the prefabricated block 3 and the geotextile layer 4 on the road base layer 1.

[0034] The prefabricated block 3 is made of concrete prefabricated block, and can also be made of wood square, EPS prefabricated module, etc. The lower part of the prefabricated block 3 is located in the foundation groove 101 and is fixed in the foundation groove 101 through the adhesive layer 2. The upper part of the prefabricated block 3 extends out of the foundation groove 101 upward, which can increase the contact area with the new pavement layer 5 and form an anchoring effect to enhance the adhesion of the new pavement layer 5 and prevent it from falling off. The prefabricated block 3 needs to be arranged in the foundation groove 101 before the adhesive layer 2 is not solidified.

[0035] Specifically, as shown in Figure 3 and Figure 4 , the prefabricated block 3 includes a wedge part 301 and an anchoring part 302. The anchoring part 302 is fixed on the wedge part 301, that is, the anchoring part 302 is at the upper part thereof, and the wedge part 301 is at the lower part thereof. The wedge part 301 and the anchoring part 302 are integrally formed. The wedge part 301 is located in the foundation groove 101, and the cross section of the wedge part 301 is a trapezoidal shape that shrinks downward, so as to facilitate the wedge part 301 to enter the foundation groove 101.

[0036] The left and right side walls of the wedge part 301 are both provided with overflow grooves 303 which are spaced apart along the extension direction of the road, as shown in Figure 2 When the wedge part 301 is located in the foundation groove 101, the upper end of the overflow groove 303 is connected to the outside of the foundation groove 101, and the lower end of the overflow groove 303 is connected to the inside of the foundation groove 101, so that the wedge part 301 can extrude the un-solidified adhesive layer 2 from the foundation groove 101 through the overflow groove 303 when it enters the foundation groove 101. In addition, the overflow groove 303 can also increase the contact area between the adhesive layer 2 and the wedge part 301 and improve the bonding effect. As shown in Figure 5 , the overflow groove 303 is a trapezoidal groove with a top width and a bottom narrowness, so as to facilitate the flow of the mortar used for the adhesive layer 2.

[0037] The geotextile layer 4 is made of polyester fiber geotextile. The geotextile layer 4 is preferably a net structure that can be penetrated by the mortar used for the new pavement layer 5. The geotextile layer 4 is uniformly laid and fixed on the adhesive layer 2 and the prefabricated block 3. The lower layer of the geotextile layer 4 is bonded and connected to the adhesive layer 2. The geotextile layer 4 forms a protrusion at the prefabricated block 3. The upper surface of the prefabricated block 3 can be coated with glue to facilitate the bonding of the area where the geotextile layer 4 contacts the prefabricated block 3. In addition to improving the compressive capacity of the road, the geotextile layer 4 can also form a force connection between the prefabricated blocks 3. When a local prefabricated block 3 is subjected to external force in the left and right directions, it can pull other prefabricated blocks 3 in the same area to bear force through the geotextile layer 4, thereby improving the mechanical properties of the new pavement layer 5.

[0038] The new pavement layer 5 is laid and fixed on the geotextile layer 4. Specifically, as shown in Figure 1The new pavement layer 5 comprises, from bottom to top, an interface layer 501, a waterproof mortar layer 502, a structural layer 503, and a wear-resistant surface layer 504. The interface layer 501 uses nano-SiO2 cement mortar, composed of nano-SiO2 cement powder and water, which provides strong adhesion and can penetrate the geotextile layer 4, ensuring a tight bond and preventing problems such as weak adhesion and easy detachment of the new pavement layer 5. The waterproof mortar layer 502 uses polymer-modified waterproof mortar or cement-based penetrating crystalline waterproof mortar, effectively preventing water penetration. The structural layer 503 uses high-strength cement mortar or polymer-modified cement mortar, primarily to provide strength support and enhance the pavement's load-bearing capacity; fiber-reinforced cement mortar can also be used to increase crack resistance. The wear-resistant surface layer 504 uses polymer-modified wear-resistant mortar or ultra-high-performance concrete, primarily to provide wear resistance, skid resistance, and long-term stability of the pavement surface.

[0039] Furthermore, such as Figure 3 The upper end face of the anchoring part 302 is provided with multiple anchor holes 304 spaced apart along the road extension direction. Pre-embedded reinforcing bars 6 are vertically installed in the anchor holes 304. These pre-embedded reinforcing bars 6 are embedded in the new road surface layer 5, thereby improving the overall strength of the new road surface layer 5 and the adhesion between its layers. The pre-embedded reinforcing bars 6 need to be installed before laying the new road surface layer 5.

[0040] The construction method of this embodiment is as follows: First, the road base layer 1 is treated and a foundation trench 101 is opened; then the adhesive layer 2 is laid; before the adhesive layer 2 solidifies, the precast block 3 is placed in the foundation trench 101, and then the geotextile layer 4 is laid on the adhesive layer 2 and the precast block 3; after the adhesive layer 2 solidifies, the interface layer 501, the waterproof mortar layer 502, the structural layer 503 and the wear-resistant surface layer 504 are laid sequentially from bottom to top.

Claims

1. A pavement patching mortar layer structure, characterized by: The road surface base (1), the adhesive layer (2), the prefabricated block (3), the geotextile layer (4) and the new road surface layer (5) are included. The base groove (101) is arranged along the road extending direction on the road surface base (1), and the base groove (101) is arranged in multiple along the left-right direction. The adhesive layer (2) is laid in the road surface base (1) and the base groove (101). The lower part of the prefabricated block (3) is arranged in the base groove (101) and fixed by the adhesive layer (2), and the upper part of the prefabricated block (3) extends out of the base groove (101). The geotextile layer (4) is uniformly laid and fixed on the adhesive layer (2) and the prefabricated block (3), and forms a protrusion at the prefabricated block (3). The new road surface layer (5) is laid and fixed on the geotextile layer (4).

2. A pavement patching mortar layer structure according to claim 1, characterized in that: The prefabricated block (3) includes the inclined wedge part (301) and the anchor part (302), the inclined wedge part (301) is located in the base groove (101), and the cross section of the inclined wedge part (301) is a trapezoidal shape which is contracted downward. The anchor part (302) is fixed on the inclined wedge part (301).

3. A pavement patching mortar layer structure according to claim 2, wherein: The left and right side walls of the inclined wedge part (301) are both arranged with the overflow groove (303) along the road extending direction, the upper end of the overflow groove (303) is communicated to the outside of the base groove (101), and the lower end of the overflow groove (303) is communicated to the inside of the base groove (101).

4. A pavement repair mortar layer structure according to claim 3, characterized in that: The overflow groove (303) is a trapezoidal groove with top width and bottom narrowness.

5. A pavement repair mortar layer structure according to claim 3, characterized in that: The upper end face of the anchor part (302) is arranged with multiple anchor holes (304) along the road extending direction, the embedded steel bar (6) is vertically arranged in the anchor hole (304), and the embedded steel bar (6) is embedded in the new road surface layer (5).

6. A pavement patching mortar layer structure according to any one of claims 1-5, characterized in that: The new road surface layer (5) includes the interface layer (501), the waterproof mortar layer (502), the structure layer (503) and the wear-resistant surface layer (504) which are laid in sequence from bottom to top.

7. A pavement repair mortar layer structure according to any one of claims 1-5, characterized in that: The geotextile layer (4) adopts polyester geotextile, and the geotextile layer (4) is a mesh structure which can be penetrated by the mortar used by the new road surface layer (5).

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