A roadbed drainage board and a composite drainage board

Abstract

This utility model provides a roadbed drainage board and a composite drainage board, belonging to the field of roadbed waterproofing technology. It includes a waterproof board body with a plurality of supporting units evenly distributed on its upper surface. Each supporting unit includes at least two inclined supporting columns, the lower ends of which are inclined towards the center of the supporting unit, and the upper ends of which are inclined away from the center of the supporting unit. The advantages of this utility model are that it improves drainage efficiency and has good compressive strength and service life, thus meeting the drainage requirements of complex roadbed environments.

Description

Technical Field

[0001] This utility model belongs to the field of roadbed waterproofing technology, specifically relating to a roadbed waterproofing and drainage board and a composite waterproofing and drainage board. Background Technology

[0002] In road engineering, the stability and durability of the roadbed play a crucial role in the normal use and lifespan of the road. Effective drainage measures are a key factor in ensuring good roadbed performance. Drainage boards, as a widely used roadbed drainage material, can promptly drain accumulated water within the roadbed area, preventing water damage to the roadbed structure and thus significantly improving roadbed stability.

[0003] Currently, various types of drainage boards are available on the market. Some drainage boards employ a traditional structural design, made from pressed plastic sheets, with drainage channels formed by surface protrusions or grooves. A composite filter layer on the surface acts as a filter, preventing soil particles from clogging the drainage channels. Others are three-dimensional composite drainage nets, composed of a three-dimensional plastic mesh bonded to permeable geotextile on both sides. Interlocking reinforcing bars form a supporting framework and drainage channels, thus providing a certain level of drainage performance and compressive strength.

[0004] However, existing drainage boards still exhibit numerous shortcomings in practical applications. Specifically, traditional three-dimensional composite drainage net structures, when subjected to significant roadbed pressure or vehicle loads, are prone to channel collapse due to the low height and unidirectional orientation of the drainage channels formed between the intersecting ribs. This further reduces the already limited cross-sectional area, significantly decreasing water flow efficiency and even creating stagnant zones. While traditional convex structures offer spacious channels, under substantial roadbed pressure or vehicle loads, the vertical arrangement of the convex points leads to stress concentration at their apex. Under excessive loads, this can easily puncture the upper composite filter layer, allowing soil particles to flow into the drainage channels through the damage and accumulate over time, causing blockages and significantly reducing the drainage efficiency of the drainage board. Utility Model Content

[0005] The purpose of this utility model is to address the problems of insufficient drainage capacity and poor structural stability of existing drainage boards during use, and to propose and design a roadbed drainage board and a composite drainage board that can improve drainage efficiency, have good compressive strength and service life, so as to meet the drainage needs of complex roadbed environments.

[0006] To achieve the above objectives, this utility model provides a roadbed drainage and waterproofing board, comprising a waterproofing board body with several support units evenly distributed on its upper surface. Each support unit includes at least two inclined support columns, with the lower end of the support column inclined towards the center of the support unit and the upper end inclined away from the center of the support unit. This design, with the lower end inclined towards the center of the support unit, concentrates the pressure from above towards the core area of ​​the support unit, and then, through the integrity of the waterproofing board body, evenly distributes the force to a wider area of ​​the base layer, preventing deformation in localized areas due to excessive stress concentration. The outward-inclined upper end transfers the load to adjacent support units, forming a collaborative force-bearing system between units. This results in a stepped force transmission pattern of "dispersion-convergence-redispersion" for the entire drainage and waterproofing board, significantly improving the overall structure's resistance to deformation. Simultaneously, this structure better complements the upper filter layer in its filtering function. Specifically, with the upper end of the support column tilted outwards, the contact points with the filter layer are distributed in a dispersed manner. Furthermore, the pressure on each contact point is more evenly distributed due to the tilt of the support column, reducing the possibility of localized damage to the filter layer caused by excessive stress. In this way, the filter layer maintains its intact filter surface under uniform support, effectively preventing soil particles from entering the drainage channels, ensuring the drainage system remains unobstructed for a long time, and reducing maintenance costs due to decreased drainage efficiency caused by particle blockage.

[0007] Furthermore, reinforcing ribs are provided between all the supporting columns in each supporting unit, and the reinforcing ribs form an interconnected overall frame, which further improves the structural strength and stability of the supporting unit.

[0008] Furthermore, the inclination directions of any two support columns in the same support unit are different, so that the support unit forms a multi-directional force equilibrium system in three-dimensional space, which further optimizes the load distribution effect.

[0009] Furthermore, each support unit includes two support columns with their centerlines skewed, meaning the centerlines of the two support columns are neither parallel nor intersecting, thus forming a spatially staggered distribution pattern, which further optimizes the force transmission and drainage space utilization of the support unit.

[0010] Furthermore, each support unit includes at least three support columns, all of which are arranged in a circular array to form a ring-shaped force-bearing structure around the center of the support unit, further improving the force balance and space utilization of the support unit.

[0011] Furthermore, the support unit and the waterproof membrane body are integrally molded parts, and they can be manufactured using a compression molding process.

[0012] Furthermore, the lower surface of the waterproof membrane body is provided with protrusions, which form gaps on the lower surface of the waterproof membrane body to prevent the waterproof membrane body from directly adhering to the base layer; at the same time, it can also serve as an anti-slip measure.

[0013] Secondly, this utility model also provides a composite drainage and waterproofing board for roadbeds, which includes the aforementioned drainage and waterproofing board for roadbeds, and can form an overall drainage and waterproofing system with a wider coverage and more coordinated functions by splicing and combining multiple of the aforementioned drainage and waterproofing boards for roadbeds.

[0014] Furthermore, it also includes a filter layer, which is installed above the support unit of the roadbed drainage board and can effectively prevent particulate impurities in the roadbed soil from entering the drainage channel of the support unit.

[0015] As can be seen from the above technical solutions, this utility model has the following advantages: First, this utility model can significantly improve the overall compressive bearing capacity of the support unit through a special support column structure, enabling it to better adapt to load changes in complex roadbed environments; second, this utility model can also enhance the contact stability between the support column structure and the upper filter layer through a special support column structure. Compared with the existing contact method between vertical columns and composite layers, the contact method between the inclined support column structure and the filter layer in this utility model can effectively disperse the local pressure borne by the filter layer and reduce the probability of the filter layer being punctured; at the same time, this inclined support column structure also allows the support columns of adjacent support units to naturally form a wider and more diversified drainage gap, breaking the limitation of a single drainage path under the traditional regular arrangement structure; in this way, even if a small blockage occurs locally, the water can find a new flow path through the adjacent diffusion gaps, effectively reducing the formation of stagnant water areas, significantly improving drainage efficiency, ensuring that the water in the roadbed can be discharged in time, avoiding roadbed diseases caused by water retention, and providing a reliable guarantee for the long-term stability of the roadbed. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the first type of roadbed drainage board in this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the second type of roadbed drainage board in this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the third type of roadbed drainage board in this utility model;

[0020] Figure 4 This is a structural schematic diagram of the fourth type of roadbed drainage board in this utility model;

[0021] Figure 5 This is a schematic diagram of the composite drainage and waterproofing board for roadbeds in this utility model.

[0022] In the diagram: 1. Waterproof membrane body; 2. Support column; 3. Reinforcing rib; 4. Support unit; 5. Filter layer; 6. Protrusion. Detailed Implementation

[0023] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0024] Example 1

[0025] like Figure 1 As shown, this embodiment provides a roadbed drainage and waterproofing board, which includes a waterproof board body 1 made of waterproof material. The lower surface of the waterproof board body 1 has protrusions 6, which form gaps on the lower surface of the waterproof board body 1 to prevent direct contact between the waterproof board body 1 and the base layer; simultaneously, they also serve an anti-slip purpose. The upper surface of the waterproof board body 1 has a plurality of support units 4 evenly distributed. The support units 4 are integrally formed with the waterproof board body 1, and the arrangement of the support units 4 on the upper surface of the waterproof board body 1 can be a rectangular array, a staggered array, a cross array, a triangular array, a hexagonal array, a zoned mixed array, etc., as long as it meets the support requirements of the filter layer 5 laid above. Specifically, in this embodiment, the support unit 4 includes at least two inclined support columns 2. The support columns 2 are preferably made of polyolefin, and the lower end of the support column 2 is inclined towards the center of the support unit 4, while the upper end of the support column 2 is inclined away from the center of the support unit 4, thus forming an outwardly expanding structure.

[0026] For example, when the support unit 4 adopts a structure with two support columns 2, such as Figure 1 , Figure 2As shown, it can make the center lines of the two support columns 2 skewed, that is, control the center lines of the two support columns 2 to be neither parallel nor intersecting, thereby forming a spatially staggered distribution pattern, and further optimizing the force transmission and drainage space utilization of the entire support unit 4. Moreover, for the cross-sectional shape of the support column 2, it is preferred to adopt a cylindrical, oblong or other structure with smooth sidewalls.

[0027] When the support unit 4 adopts a structure of more than two support columns 2, such as Figure 3 , Figure 4 As shown, all the support columns 2 can be arranged in a circular array to form a ring-shaped force-bearing structure around the center of the support unit 4, thereby further improving the force balance and space utilization of the entire support unit 4. Moreover, the cross-sectional shape of the support columns 2 is preferably cylindrical, oblong, or other structures with smooth sidewalls.

[0028] Furthermore, as a preferred embodiment, this embodiment can also provide reinforcing ribs 3 between all the supporting columns 2 in each supporting unit 4, and form an interconnected overall frame through these reinforcing ribs 3, further improving the structural strength and stability of the supporting unit 4. Moreover, in this case, the reinforcing ribs 3 can be integrally formed with the waterproof membrane body 1 and the supporting columns 2 using methods such as compression molding.

[0029] Example 2

[0030] like Figure 5 As shown in the second embodiment, this provides a composite drainage and waterproofing board for roadbeds. It consists of an upper non-woven geotextile filter material, a core of several diagonally braced polyolefin bosses, and a bottom anti-slip waterproofing plate. Specifically, in this embodiment, it includes the aforementioned drainage and waterproofing board for roadbeds, and also includes a filter layer 5 made of materials such as non-woven geotextiles. The filter layer 5 is installed above the support unit 4 of the drainage and waterproofing board for roadbeds, forming a composite drainage network. This effectively prevents particulate impurities in the roadbed soil from entering the drainage channels of the support unit 4, ensuring the drainage channels remain unobstructed and avoiding a decrease in drainage efficiency due to impurity accumulation. Furthermore, the drainage and waterproofing board significantly improves the overall compressive bearing capacity and effectively disperses the local pressure borne by the filter layer 5, reducing the probability of the filter layer 5 being punctured, thereby extending the overall service life.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A roadbed drainage and waterproofing board, comprising a waterproof board body (1), wherein a plurality of support units (4) are evenly distributed on the upper surface of the waterproof board body (1); characterized in that, Each support unit (4) includes at least two inclined support columns (2), with the lower end of the support column (2) inclined toward the center of the support unit (4) and the upper end of the support column (2) inclined away from the center of the support unit (4).

2. The roadbed drainage and waterproofing board according to claim 1, characterized in that, Reinforcing ribs (3) are provided between all the support columns (2) in each support unit (4).

3. The roadbed drainage and waterproofing board according to claim 1, characterized in that, The inclination directions of any two support columns (2) in the same support unit (4) are different.

4. The roadbed drainage and waterproofing board according to claim 1, 2, or 3, characterized in that, Each support unit (4) includes two support columns (2), and the centerlines of the two support columns (2) are not in the same plane.

5. The roadbed drainage and waterproofing board according to claim 1, 2, or 3, characterized in that, Each support unit (4) includes at least three support columns (2), and all the support columns (2) are arranged in a circular array.

6. The roadbed drainage and waterproofing board according to claim 1, 2, or 3, characterized in that, The support unit (4) and the waterproof membrane body (1) are integrally formed.

7. The roadbed drainage and waterproofing board according to claim 1, 2, or 3, characterized in that, The lower surface of the waterproof membrane body (1) is provided with protrusions (6).

8. A composite drainage and waterproofing board for roadbeds, characterized in that, Includes the roadbed drainage board according to any one of claims 1-7.

9. The composite drainage and waterproofing board for roadbeds according to claim 8, characterized in that, It also includes a filter layer (5), which is installed above the support unit (4) of the roadbed drainage board.

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