Asphalt pavement roadbed lateral waterproof structure

Abstract

The utility model relates to road surface structure technical field, concretely is a kind of asphalt pavement roadbed lateral waterproof structure, including bottom base, roadbed and the asphalt layer being laid on roadbed, the upper surface and both sides of asphalt layer are provided with adhesive layer, the adhesive layer is bonded with several waterproof boards, the lower end of waterproof board extends to roadbed, the one end lower end surface of waterproof board is fixedly connected with clamping block, one side of clamping block is fixedly connected with connecting block, the other end upper end surface of waterproof board is provided with the clamping groove of cooperation with clamping block, the inner wall of clamping groove is provided with avoid slot. Compared with prior art, the surface and both sides of waterproof board and asphalt layer are bonded by asphalt hot melt adhesive in the present application, rainwater is prevented from flowing through both sides of asphalt layer, the problem that rainwater will flow to both sides along horizontal slope and infiltrate into the structure, causing asphalt layer side erosion, roadbed softening and other problems is solved, which seriously affects the safety and durability of pavement.

Description

Technical Field

[0001] This utility model relates to the field of road structure technology, specifically to a lateral waterproofing structure for asphalt pavement subgrade. Background Technology

[0002] Asphalt pavement refers to various types of road surfaces constructed by incorporating road-grade asphalt into mineral materials. Asphalt binders enhance the ability of paving aggregates to resist damage from traffic and natural factors, resulting in a smooth, dust-free, impermeable, and durable surface. Therefore, asphalt pavement is one of the most widely used high-grade road surfaces in road construction.

[0003] Currently, based on observations and surveys conducted over long periods of use, asphalt pavements are subject to erosion from rainwater on their sides. Rainwater can flow along the upper surface of the pavement to both sides, causing damage to the asphalt pavement and affecting its service life and safety performance. To address this issue, we propose a lateral waterproofing structure for asphalt pavement subgrade. Utility Model Content

[0004] This utility model aims to provide a lateral waterproofing structure for asphalt pavement subgrade, mainly to solve the technical problem that, in the long-term use of asphalt pavement, rainwater flows along the transverse slope to both sides and seeps into the structure, causing lateral erosion of the asphalt layer and softening of the subgrade, which seriously affects the safety and durability of the pavement.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A lateral waterproofing structure for asphalt pavement subgrade includes a subbase, a subgrade, and an asphalt layer laid on the subgrade. An adhesive layer is provided on the upper surface and both sides of the asphalt layer. Several waterproofing sheets are bonded to the adhesive layer. The lower ends of the waterproofing sheets extend into the subgrade. A snap-fit ​​block is fixed to the lower end face of one end of the waterproofing sheet. A connecting block is fixed to one side of the snap-fit ​​block. A snap-fit ​​groove for cooperating with the snap-fit ​​block is formed on the upper end face of the other end of the waterproofing sheet. A clearance groove is formed on the inner wall of the snap-fit ​​groove. Several insertion rods are fixed to the lower end face of the waterproofing sheet. An extrusion plate is fixed to the outer wall of the waterproofing sheet.

[0007] The working principle and beneficial effects of this utility model:

[0008] 1. Working principle: Water on the asphalt pavement flows to both sides. Because the waterproof membrane is bonded to the surface and both sides of the asphalt layer through the adhesive layer, it prevents rainwater from entering the sides of the asphalt pavement. The water on the asphalt pavement flows along the waterproof membrane and the extrusion plate to the subbase. The inner wall of the extrusion plate abuts against the roadbed slope of the subbase, compacting the roadbed slope.

[0009] 2. Beneficial effects:

[0010] (1) This solution uses hot melt asphalt adhesive to bond the waterproof membrane to the surface and sides of the asphalt layer, preventing rainwater from flowing through the sides of the asphalt layer. This solves the technical problem that rainwater will flow along the transverse slope to both sides and seep into the structure, causing side erosion of the asphalt layer and softening of the roadbed, which seriously affects the safety and durability of the road surface.

[0011] (2) This solution fixes the extrusion plate to the outer wall of the waterproof membrane. The extrusion plate abuts against the roadbed slope of the subbase. The waterproof membrane is fixed and the inner wall of the extrusion plate compacts the roadbed slope, reducing the loosening of the roadbed slope and preventing the roadbed from sliding or settling due to rainwater erosion. It also diverts the water accumulated on the asphalt pavement to both sides of the subbase to avoid water stagnation at the edge of the asphalt layer, thus reducing the risk of frost heave or seepage damage.

[0012] Preferably, the adhesive layer is asphalt hot melt adhesive; the asphalt hot melt adhesive is made of the same material as the asphalt layer, and forms a seamless bond after hot melting and cooling, avoiding interface peeling. After curing, it can withstand the lateral stress caused by vehicle load and prevent the waterproof membrane from falling off due to vibration or temperature difference deformation.

[0013] Preferably, the waterproof membrane has an inverted L-shaped cross-section, with the horizontal section extending horizontally along the surface of the asphalt layer and the vertical section extending to the side of the asphalt layer. The inner side of the waterproof membrane is bonded to the upper surface and both sides of the asphalt layer by asphalt hot melt adhesive. The inverted L-shaped structure upgrades the traditional "single-sided waterproofing" to a "top + side" double seal, completely sealing the seepage path.

[0014] Preferably, the cross-section of the snap-fit ​​block is set in a right-angled trapezoid, and the slope of the snap-fit ​​groove abuts against the slope of the snap-fit ​​block; the right-angled trapezoidal snap-fit ​​block and the slope of the snap-fit ​​groove are tightly abutted against each other, and under the action of horizontal external force, they produce a tightening effect, preventing the waterproof membrane from shifting laterally or coming off. The tight fit between the snap-fit ​​block and the snap-fit ​​groove forms the first waterproof barrier, blocking rainwater from penetrating laterally.

[0015] Preferably, one end of the plug rod is fixedly connected to the lower end face of the vertical section of the waterproof membrane, and one end of the plug rod is inserted into the base layer and fixedly connected with a conical head; forming a "barb" effect to resist the floating or lateral displacement of the waterproof membrane caused by vehicle vibration or water flow.

[0016] Preferably, one end of the waterproof membrane has a first receiving groove, and the other end of the waterproof membrane has a second receiving groove. A first sealing strip is fixedly connected in the first receiving groove, and a second sealing strip is fixedly connected in the second receiving groove. The cross-section of the first sealing strip is arc-shaped, and the inner wall of the second sealing strip has a groove that matches the first sealing strip. Through the cooperation of the first sealing strip and the second sealing strip, the gap between adjacent waterproof membranes is sealed to prevent water from seeping into the gap between adjacent waterproof membranes. The compression deformation of the elastic material provides a second flexible seal.

[0017] Preferably, the extrusion plate is inclined on one side of the waterproofing plate, and the inner wall of the extrusion plate abuts against the soil surface of the subbase. A plug-in block is fixed to the lower end face of the end of the extrusion plate away from the waterproofing plate, and the plug-in block is plugged into the subbase. The plug-in block and the subbase make the extrusion plate more firmly abut against the roadbed slope, preventing the extrusion plate from shifting. The inner wall of the extrusion plate compacts the roadbed slope, reduces the loosening of the roadbed slope, and prevents the roadbed from lateral slippage or settlement caused by rainwater erosion. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a lateral waterproofing structure for an asphalt pavement subgrade according to this utility model patent.

[0019] Figure 2 This utility model patent provides a structural diagram of a waterproofing plate for a lateral waterproofing structure of an asphalt pavement subgrade.

[0020] Figure 3 This utility model patent provides a structural diagram of a waterproofing plate for a lateral waterproofing structure of an asphalt pavement subgrade.

[0021] Figure 4 This is a cross-sectional view of the subbase of an asphalt pavement subgrade lateral waterproofing structure according to this utility model patent;

[0022] Figure 5 This is a cross-sectional view of adjacent waterproofing plates spliced ​​together in an asphalt pavement subgrade lateral waterproofing structure according to this utility model patent.

[0023] Figure 6 This utility model patent relates to a lateral waterproofing structure for asphalt pavement subgrade. Figure 5 Enlarged view of point A.

[0024] The reference numerals in the accompanying drawings of the instruction manual include: 1. Subbase; 2. Subgrade; 3. Asphalt layer; 4. Adhesive layer; 5. Waterproof membrane; 6. Clip-on block; 7. Connecting block; 8. Clip-on groove; 9. Alternating groove; 10. Insert rod; 11. Extrusion plate; 12. Conical head; 13. First receiving groove; 14. Second receiving groove; 15. First sealing strip; 16. Second sealing strip; 17. Insert block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-6This diagram illustrates a lateral waterproofing structure for an asphalt pavement subgrade, comprising a base course 1, a subgrade 2, and an asphalt layer 3 laid on the subgrade 2. An adhesive layer 4 is provided on the upper surface and both sides of the asphalt layer 3. Several waterproofing sheets 5 are bonded to the adhesive layer 4. The adhesive layer 4 is made of hot-melt asphalt adhesive, which is of the same material as the asphalt layer 3. After hot melting and cooling, a seamless bond is formed, preventing interface peeling. After curing, it can withstand the lateral stress caused by vehicle loads, preventing the waterproofing sheets 5 from detaching due to vibration or temperature difference deformation. The waterproofing sheets 5 have an inverted L-shaped cross-section, with horizontal sections extending horizontally along the surface of the asphalt layer 3 and vertical sections extending towards the sides of the asphalt layer 3. The inner side of the waterproofing sheets 5 is bonded to the upper surface and sides of the asphalt layer 3 by the hot-melt asphalt adhesive. With adhesive on both sides, the vertical section of the waterproof membrane 5 extends into the roadbed 2. The inverted L-shaped structure upgrades the traditional "single-sided waterproofing" to a double seal of "top surface + side surface," completely sealing the seepage path. A snap-fit ​​block 6 is fixed to the lower end face of one end of the waterproof membrane 5, and a connecting block 7 is fixed to one side of the snap-fit ​​block 6. A snap-fit ​​groove 8 is opened on the upper end face of the other end of the waterproof membrane 5 to cooperate with the snap-fit ​​block 6. The cross-section of the snap-fit ​​block 6 is set in a right-angled trapezoid. The slope of the snap-fit ​​groove 8 abuts against the slope of the snap-fit ​​block 6. The right-angled trapezoidal snap-fit ​​block 6 and the slope of the snap-fit ​​groove 8 are tightly abutted against each other, producing a tightening effect under the action of horizontal external force, preventing the waterproof membrane 5 from shifting laterally or coming off. The snap-fit ​​block 6 and the snap-fit ​​groove 8 are tightly fitted together. Forming the first waterproof barrier to prevent rainwater from seeping laterally, the inner wall of the snap-fit ​​groove 8 has a clearance groove 9 that slides with the connecting block 7. Several plug-in rods 10 are fixedly connected to the lower end face of the waterproof board 5. One end of the plug-in rod 10 is fixedly connected to the lower end face of the vertical section of the waterproof board 5. One end of the plug-in rod 10 is inserted into the subbase 1 and fixedly connected to a conical head 12. An extrusion plate 11 is fixedly connected to the outer wall of the waterproof board 5. The extrusion plate 11 is located on one side of the waterproof board 5 and is inclined. The inner wall of the extrusion plate 11 abuts against the soil surface of the subbase 1. A plug-in block 17 is fixedly connected to the lower end face of the end of the extrusion plate 11 away from the waterproof board 5. The plug-in block 17 is inserted into the subbase 1. The inner wall of the extrusion plate 11 compacts the slope of the roadbed 2, reducing... The roadbed slope is loose to prevent lateral slippage or settlement of the roadbed 2 caused by rainwater erosion. One end of the waterproof membrane 5 is provided with a first receiving groove 13 and the other end is provided with a second receiving groove 14. A first sealing strip 15 is fixedly connected in the first receiving groove 13 and a second sealing strip 16 is fixedly connected in the second receiving groove 14. The cross-section of the first sealing strip 15 is set in an arc shape. The inner wall of the second sealing strip 16 is provided with a groove that matches the first sealing strip 15. Through the cooperation of the first sealing strip 15 and the second sealing strip 16, the gap between adjacent waterproof membranes 5 is sealed to prevent water from seeping into the gap between adjacent waterproof membranes 5. The compression deformation of the elastic material provides a second flexible seal.

[0027] As can be seen from the above, the specific embodiments of this utility model are as follows:

[0028] The waterproof membrane 5 is bonded to the surface and sides of the asphalt layer 3 from top to bottom using hot melt asphalt adhesive. After hot melting and cooling, a seamless bond is formed, preventing interface peeling. Once cured, it can withstand the lateral stress caused by vehicle loads, preventing the waterproof membrane 5 from detaching due to vibration or temperature deformation. The vertical section of the waterproof membrane 5 extends into the roadbed 2. When the waterproof membrane 5 moves downwards, it causes the insertion rod 10 to move downwards as well. The downward movement of the insertion rod 10 causes the conical head 12 to insert into the subbase 1, making the waterproof membrane 5 more firmly fixed. Simultaneously, the downward movement of the waterproof membrane 5 causes the extrusion plate 11, which is fixed to the outer wall, to connect with the roadbed 2 on the subbase 1. The slopes abut against each other, and the inner wall of the extrusion plate 11 compacts the slope of the roadbed 2, reducing the loosening of the roadbed 2 slope and preventing lateral slippage or settlement of the roadbed 2 caused by rainwater erosion. The plug block 17 fixed to one end of the extrusion plate 11 is inserted into the subbase 1 to enhance the stability of the extrusion plate 11. Then, the next waterproof plate 5 is bonded to the surface and both sides of the asphalt layer 3 from top to bottom. At the same time, the snap-fit ​​block 6 fixed to the lower end face of one end of the next waterproof plate 5 is aligned with the opening of the snap-fit ​​groove 8 opened on the upper end face of one end of the previous waterproof plate 5. Then, the snap-fit ​​block 6 of the next waterproof plate 5 is snapped into the snap-fit ​​groove 8. The connecting block 7, fixed on one side, moves from top to bottom along the clearance groove 9. Since the cross-section of the locking block 6 is a right-angled trapezoid, the slope of the locking groove 8 abuts against the slope of the locking block 6. The right-angled trapezoidal locking block 6 and the slope of the locking groove 8 are tightly pressed together, creating a tightening effect under horizontal external force. This prevents the adjacent waterproof membrane 5 from shifting laterally or separating, splicing the adjacent waterproof membranes 5. The tight fit between the locking block 6 and the locking groove 8 forms the first waterproof barrier, blocking rainwater penetration. Simultaneously, the second sealing strip 16 is fixed to the inner wall of the second receiving groove 14 opened at one end of the next waterproof membrane 5. The first sealing strip 15 is fixed to the inner wall of the first receiving groove 13 opened at one end of the previous waterproof membrane 5. The arc-shaped protrusion of the first sealing strip 15 and the groove of the second sealing strip 16 form an interference fit, constituting the first mechanical seal. At the same time, the compression deformation of the elastic material provides the second flexible seal, preventing water from seeping in from the joint of the adjacent waterproof membrane 5. The waterproof membranes 5 are bonded and fixed one by one along both sides of the asphalt layer 3. The water on the asphalt layer 3 road surface will flow along the waterproof membrane 5 and through the extrusion plate 11 to both sides of the subbase 1, thus waterproofing the asphalt layer 3 and both sides of the roadbed 2.

[0029] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A lateral waterproofing structure for asphalt pavement subgrade, comprising a subbase (1), a subgrade (2), and an asphalt layer (3) laid on the subgrade (2), characterized in that, An adhesive layer (4) is provided on the upper surface and both sides of the asphalt layer (3). Several waterproof boards (5) are bonded to the adhesive layer (4). The lower end of the waterproof board (5) extends into the roadbed (2). A snap-fit ​​block (6) is fixed to the lower end face of one end of the waterproof board (5). A connecting block (7) is fixed to one side of the snap-fit ​​block (6). A snap-fit ​​groove (8) is opened on the upper end face of the other end of the waterproof board (5) to cooperate with the snap-fit ​​block (6). An avoidance groove (9) is opened on the inner wall of the snap-fit ​​groove (8) to slide with the connecting block (7). Several plug-in rods (10) are fixed to the lower end face of the waterproof board (5). An extrusion plate (11) is fixed to the outer wall of the waterproof board (5).

2. The asphalt pavement subgrade lateral waterproofing structure according to claim 1, characterized in that, The adhesive layer (4) is asphalt hot melt adhesive.

3. The asphalt pavement subgrade lateral waterproofing structure according to claim 1, characterized in that, The waterproof membrane (5) has an inverted L-shaped cross section. The horizontal section extends horizontally along the surface of the asphalt layer (3), and the vertical section extends to the side of the asphalt layer (3). The inner side of the waterproof membrane (5) is bonded to the upper surface and both sides of the asphalt layer (3) by asphalt hot melt adhesive.

4. The asphalt pavement subgrade lateral waterproofing structure according to claim 1, characterized in that, The cross-section of the snap-fit ​​block (6) is arranged in a right-angled trapezoid, and the slope of the snap-fit ​​groove (8) abuts against the slope of the snap-fit ​​block (6).

5. The asphalt pavement subgrade lateral waterproofing structure according to claim 1, characterized in that, One end of the plug rod (10) is fixedly connected to the lower end face of the vertical section of the waterproof membrane (5), and one end of the plug rod (10) is inserted into the base layer (1) and fixedly connected with a conical head (12).

6. The asphalt pavement subgrade lateral waterproofing structure according to claim 1, characterized in that, The waterproof membrane (5) has a first receiving groove (13) at one end and a second receiving groove (14) at the other end. A first sealing strip (15) is fixedly connected in the first receiving groove (13) and a second sealing strip (16) is fixedly connected in the second receiving groove (14). The cross-section of the first sealing strip (15) is arc-shaped and the inner wall of the second sealing strip (16) has a groove that matches the first sealing strip (15).

7. The asphalt pavement subgrade lateral waterproofing structure according to claim 1, characterized in that, The extrusion plate (11) is located on one side of the waterproof board (5) and is inclined. The inner wall of the extrusion plate (11) abuts against the soil surface of the subbase (1). A plug-in block (17) is fixedly connected to the lower end face of the end of the extrusion plate (11) away from the waterproof board (5). The plug-in block (17) is plugged into the subbase (1).

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