A kind of slope seepage prevention geomembrane and slope seepage prevention structure

Abstract

The utility model discloses a kind of side slope anti-seepage geomembrane and side slope anti-seepage structure, belong to side slope processing technical field.The side slope anti-seepage geomembrane includes geomembrane (1) and the upper and lower sides of its upper layer geogrid (2) and lower layer geogrid (3), and upper layer geogrid (2) and lower layer geogrid (3) are all formed by grid bar that is crossed vertically and horizontally;Upper layer geogrid (2) and lower layer geogrid (3) are same in shape and are set up in correspondence with up and down, and glass fibre mesh (4) that is same in shape with upper layer geogrid (2) is equipped on geomembrane (1), and upper layer geogrid (2) and lower layer geogrid (3) respectively fixed in the upper and lower sides of glass fibre mesh (4) and it is set up in correspondence with glass fibre mesh (4).Installation mode is simple, need not to punch, and good anti-seepage effect.Glass fibre mesh sets up one can do many things;One is to enhance the strength of geomembrane, two is as the fixed framework of upper layer geogrid and lower layer geogrid.

Description

Technical Field

[0001] This utility model belongs to the field of slope treatment technology, and specifically relates to a slope seepage-proof geomembrane and a slope seepage-proof structure. Background Technology

[0002] A seepage control system is an engineering structure used to prevent liquid leakage, and includes various types such as clay seepage control, geomembrane seepage control, and concrete seepage control. Among them, geomembrane seepage control systems have been widely used due to the excellent seepage control effect, good corrosion and aging resistance, and long service life of geomembranes.

[0003] Geomembrane is a low-permeability waterproof barrier material made from polymers. It is a general term for various geosynthetic materials, including polyvinyl chloride (PVC) and polyethylene (PE). High-density polyethylene (HDPE) geomembranes are commonly used in environmental protection and seepage prevention projects. Because geomembranes are very thin and serve as the main seepage barrier layer in a seepage prevention system, damage to them will lead to seepage. Therefore, protective layers (specifically geogrids) should be installed above and below the geomembrane.

[0004] In existing technologies, geomembranes can be used in conjunction with geogrids.

[0005] For example, patent application number CN201610381336.6 discloses a double-layer composite geogrid, which consists of an HDPE geomembrane, double-layer longitudinal geogrid strips, double-layer transverse geogrid strips, double-layer diagonal geogrid strips, bolt heads, nuts, and bolts as the basic unit of the invention. A hole is provided at the overlap of every two geogrid strips on the double-layer geogrid, through which the bolt is passed to connect the double-layer geogrid to the HDPE geomembrane. This invention places the HDPE geomembrane between the double-layer geogrid; the HDPE geomembrane thickness is 1.5-2mm, the double-layer geogrid thickness is 6-8mm, and the geogrid strip width is 20-25mm.

[0006] For example, patent application number CN201720892853.X discloses a reinforced double-layer geogrid, including an upper geogrid, a lower geogrid, a geomembrane, a tapered connecting rod, and a nut; a geomembrane is provided between the upper geogrid and the lower geogrid, and mounting holes are provided at the connection points of the transverse and longitudinal grids of the upper geogrid and the lower geogrid, respectively. The tapered connecting rod passes through the mounting holes and connects the upper geogrid, the geomembrane, and the lower geogrid together through the nut.

[0007] For example, patent application number CN201921647926.4 discloses a reinforced double-layer geogrid, including an upper geogrid, a lower geogrid, and a geomembrane. The geomembrane is disposed between the upper and lower geogrids. Both the upper and lower geogrids are composed of transverse and longitudinal grids, and a reinforcing inclined grid is fixedly installed above the transverse and longitudinal grids. The reinforcing inclined grid is intersected on the transverse and longitudinal grids, and through holes are provided at the connection points with the transverse and longitudinal grids. Connecting plates are fixedly connected to both sides of the upper and lower geogrids, and several screw holes are provided on the connecting plates. The connecting plates on both sides of the upper and lower geogrids are fixedly connected to each other by screws through the screw holes. Plastic conical nail sleeves are installed at the bottom of the transverse and longitudinal grids where they are not connected to the reinforcing inclined grids. The plastic conical nail sleeves at the bottom of the upper geogrid and the bottom of the lower geogrid are nested and connected to each other.

[0008] For example, patent application number CN202123018887.1 discloses an interlocking grouting composite geogrid, which consists of an upper geogrid, a middle geomembrane, a lower geogrid, a conical screw, a nut, and serrations. The upper geogrid is a biaxially oriented plastic geogrid, the middle geomembrane is an HDPE geomembrane, and the lower geogrid is a steel-plastic geogrid. The conical screw is a cylindrical structure with a thread at one end and a conical head at the other end, and the bottom diameter of the conical head is 1-2 cm larger than the diameter of the conical screw body. The inner diameter of the nut is adapted to the threaded end of the conical screw, and the outer diameter of the nut is 1-2 cm larger than the diameter of the circular through holes of the upper and lower geogrids. Both the upper and lower geogrids have corresponding circular through holes of the same size at their reinforcement overlaps. The diameter of the circular through hole is 0.2-0.8 cm larger than the diameter of the tapered screw rod.

[0009] In existing technologies, the upper and lower geogrids are locked and fixed to the upper and lower sides of the geomembrane using corresponding fixing structures, with corresponding through holes on the geomembrane for the fixing structures to pass through. This structure is not only complex to install, but the placement of the through holes also affects the seepage prevention effect. Summary of the Invention

[0010] To address the aforementioned problems, this utility model provides a slope seepage-proof geomembrane and slope seepage-proof structure, which is simple to install, requires no drilling, and has good seepage-proof effect. The inclusion of a fiberglass mesh serves multiple purposes: firstly, it enhances the strength of the geomembrane; secondly, it acts as a fixing framework for the upper and lower geogrid layers. The technical solution is as follows:

[0011] On one hand, this utility model embodiment provides a slope seepage-proof geomembrane, including a geomembrane 1 and an upper geogrid 2 and a lower geogrid 3 on its upper and lower sides. The upper geogrid 2 and the lower geogrid 3 are both composed of intersecting grid bars. The upper geogrid 2 and the lower geogrid 3 have the same shape and are arranged correspondingly. The geomembrane 1 is provided with a glass fiber mesh 4 with the same shape as the upper geogrid 2. The upper geogrid 2 and the lower geogrid 3 are respectively fixed on the upper and lower sides of the glass fiber mesh 4 and are arranged correspondingly to the glass fiber mesh 4.

[0012] In this embodiment of the invention, the geomembrane 1 is an HDPE geomembrane with a basis weight of 300-600 g / m³. 2 The upper geogrid 2 is a polypropylene geogrid or a polyamide geogrid, the lower geogrid 3 is a polypropylene geogrid or a polyamide geogrid, and the glass fiber mesh 4 is an ECR glass fiber mesh.

[0013] In this embodiment of the invention, the glass fiber mesh 4 is composed of intersecting grid strips, with its upper and lower sides flush with or protruding from the corresponding sides of the geomembrane 1; the upper geogrid 2 and the lower geogrid 3 are fixed to the glass fiber mesh 4 by heat sealing, adhesive bonding or welding.

[0014] Specifically, in this embodiment of the present invention, the thickness of the grid strip is 4-8mm, and the thickness of the mesh strip is greater than or equal to the thickness of the grid strip.

[0015] Specifically, in this embodiment of the present invention, the grids of the upper geogrid 2, the grids of the lower geogrid 3, and the grids of the glass fiber mesh 4 are all rectangular and their specifications are (3-30cm)*(3-30cm).

[0016] In this embodiment of the invention, the height of the lower geogrid 3 is 5-15cm, and the height of the upper geogrid 2 is 8-30cm.

[0017] Specifically, in this embodiment of the present invention, the grids of the upper geogrid 2, the lower geogrid 3, and the fiberglass mesh 4 are all rectangular with dimensions of (5-20cm)*(5-20cm), and the geomembrane 1 has a basis weight of 350-550g / m³. 2 The lower geogrid 3 has a height of 10cm, and the upper geogrid 2 has a height of 20cm.

[0018] On the other hand, this utility model embodiment also provides a slope seepage prevention structure, including a slope base layer, turf, and the aforementioned slope seepage prevention geomembrane. The lower geogrid 3 of the slope seepage prevention geomembrane is inserted on the slope base layer, the geomembrane 1 of the slope seepage prevention geomembrane covers the surface of the slope base layer, and the upper geogrid 2 of the slope seepage prevention geomembrane is filled with backfill material. The backfill material is selected from one or more of soil, sand, and gravel, and its surface is planted with turf.

[0019] In this embodiment of the invention, the slope of the slope base layer is less than 1:3.

[0020] Preferably, in this embodiment of the present invention, the backfill material protrudes upwards by 5-15cm relative to the upper geogrid 2.

[0021] The beneficial effects of the technical solution provided by this utility model embodiment are:

[0022] 1. Improve the stability of geomembrane: Glass fiber mesh strips are added to both the longitudinal and transverse directions of the traditional geomembrane, and geogrids are added above and below the mesh strips, making the geogrids and glass fiber mesh strips an integrated unit. This design not only enhances the tensile and shear strength of the geomembrane but also increases its stiffness and stability.

[0023] 2. Enhanced friction between the geomembrane and the base layer: The lower geogrid is inserted into the base layer, increasing the friction between the geomembrane and the base layer and preventing the geomembrane from slipping off. This design effectively solves the problem of geomembrane slipping off the base layer, thereby improving the geomembrane's seepage prevention effect.

[0024] 3. Improve the adhesion of the geomembrane surface layer: The upper geogrid is used for backfilling soil or other materials on the surface of the geomembrane, ensuring uniform backfilling and preventing backfill material from slipping off. This design improves the adhesion of the geomembrane surface layer.

[0025] 4. Simplified construction process: The laying and fixing of geomembrane is simpler, without the need for drilling and installing fixing structures, which reduces construction time and costs and improves construction efficiency.

[0026] In summary, compared with existing technologies, this patent not only improves the stability of the geomembrane, enhances the friction between the geomembrane and the foundation, and improves the adhesion of the geomembrane surface layer, but also simplifies the construction process, demonstrating significant advantages. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the slope impermeable geomembrane disclosed in the embodiments of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of a geomembrane combined with a glass fiber mesh.

[0029] In the diagram: 1 geomembrane, 2 upper geogrid, 3 lower geogrid, 4 fiberglass mesh. Detailed Implementation

[0030] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] See Figure 1-2 Example 1 provides a slope seepage prevention geomembrane, including geomembrane 1 and upper geogrid 2 and lower geogrid 3 on its upper and lower sides.

[0033] Among them, geomembrane 1 is an HDPE geomembrane with a basis weight of 300-600 g / m³. 2 (Preferred size: 350-550g / m³) 2 A glass fiber mesh 4 is provided on the geomembrane 1. The glass fiber mesh 4 has the same shape as the upper geogrid 2 (or the lower geogrid 3), and it is composed of intersecting grid strips (multiple transverse grid strips and multiple longitudinal grid strips). Its upper and lower sides are flush with or protrude from the corresponding sides of the geomembrane 1. Specifically, the glass fiber mesh 4 is an ECR glass fiber mesh. The glass fiber mesh 4 can be integrally formed with the geomembrane 1.

[0034] The upper geogrid 2 and lower geogrid 3 are both composed of intersecting geogrid strips (multiple transverse geogrid strips and multiple longitudinal geogrid strips). The upper geogrid 2 and lower geogrid 3 are identical in shape and arranged vertically. They are fixed to the upper and lower sides of the fiberglass mesh 4 (through heat sealing, adhesive bonding, or welding), respectively, corresponding to the fiberglass mesh 4. The upper geogrid 2, fiberglass mesh 4, and lower geogrid 3 are arranged sequentially from top to bottom to form a single unit. Specifically, transverse geogrid strips are fixed above or below the corresponding transverse geogrid strips, and longitudinal geogrid strips are fixed above or below the corresponding longitudinal geogrid strips. Specifically, the upper geogrid 2 is a polypropylene geogrid or polyamide geogrid, etc., with a height of 8-30 cm. The lower geogrid 3 is a polypropylene geogrid or polyamide geogrid, etc., with a height of 5-15 cm. The upper geogrid 2 and the lower geogrid 3 may be made of the same or different materials, preferably the same. Preferably, the height of the upper geogrid 2 is greater than the height of the lower geogrid 3.

[0035] Specifically, in this embodiment of the invention, the grids of the upper geogrid 2, the lower geogrid 3, and the fiberglass mesh 4 are all rectangular with dimensions of (3-30cm)*(3-30cm) (preferably (5-20cm)*(5-20cm)). The thickness of the grid strips (the thickness on the surface of the geogrid) is 4-8mm, and the thickness of the mesh strips (the thickness on the surface of the geomembrane 1) is greater than or equal to the thickness of the grid strips.

[0036] Example 2

[0037] Example 2 provides a slope impermeable geomembrane. The structure of this slope impermeable geomembrane is basically the same as that of Example 1, except that the upper geogrid 2 and the lower geogrid 3 in this example are both polypropylene geogrids.

[0038] Example 3

[0039] Example 3 provides a slope impermeable geomembrane. The structure of this slope impermeable geomembrane is basically the same as that of Example 1, except that the upper geogrid 2 in this example is a polypropylene geogrid, and the lower geogrid 3 is a polyamide geogrid.

[0040] Example 4

[0041] Example 4 provides a slope impermeable geomembrane. The structure of the slope impermeable geomembrane is basically the same as that of Example 1. The difference is that the upper geogrid 2 and the lower geogrid 3 in this example are both polypropylene geogrids and are fixed to the glass fiber mesh 4 by welding.

[0042] Example 5

[0043] Example 5 provides a slope impermeable geomembrane. The structure of this slope impermeable geomembrane is basically the same as that of Example 1, except that the grids of the upper geogrid 2, the lower geogrid 3, and the fiberglass mesh 4 in this example are all rectangular with dimensions of (5-20cm)*(5-20cm), and both the grids and mesh are square. The weight of the geomembrane 1 is 350-550 g / m³. 2 The lower geogrid 3 has a height of 10cm, and the upper geogrid 2 has a height of 20cm; the thickness of the geogrid strips is 5mm, and the thickness of the mesh strips is 8mm.

[0044] Example 6

[0045] Example 6 provides a slope seepage prevention structure, including a slope base layer (a soil layer that can be compacted (ensuring flatness and strength while allowing the lower geogrid 3 to be inserted), which is an existing structure), turf, and the slope seepage prevention geomembrane disclosed in Examples 1-5, etc. The lower geogrid 3 of the slope seepage prevention geomembrane is inserted on the slope base layer, and the geomembrane 1 of the slope seepage prevention geomembrane covers the surface of the slope base layer. The upper geogrid 2 of the slope seepage prevention geomembrane is filled with backfill material (the top of which is flush with or protrudes from the top of the upper geogrid 2). The backfill material is selected from one or more of soil, sand, and gravel, and its surface is planted with turf.

[0046] In this embodiment of the invention, the slope of the slope base layer is less than 1:3, meaning that the structure of this patent can only be used on slopes with a small slope.

[0047] Example 7

[0048] Example 7 provides a slope seepage prevention structure, which is basically the same as the structure of Example 6, except that the backfill material in this example protrudes upward by 5-15cm relative to the upper geogrid 2 to facilitate the planting of turf.

[0049] Example 8

[0050] Example 8 provides a slope seepage prevention structure, which is basically the same as the structure of Example 6, except that: in this example, the height of the lower geogrid 3 is 10cm, the height of the upper geogrid 2 is 20cm, and the backfill material protrudes upward by 10cm relative to the upper geogrid 2.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A slope impermeable geomembrane, comprising a geomembrane (1) and upper geogrid (2) and lower geogrid (3) on its upper and lower sides, wherein both the upper geogrid (2) and the lower geogrid (3) are composed of intersecting grid bars; characterized in that, The upper geogrid (2) and the lower geogrid (3) have the same shape and are arranged correspondingly. The geomembrane (1) is provided with a glass fiber mesh (4) with the same shape as the upper geogrid (2). The upper geogrid (2) and the lower geogrid (3) are respectively fixed on the upper and lower sides of the glass fiber mesh (4) and are arranged correspondingly to the glass fiber mesh (4).

2. The slope impermeable geomembrane according to claim 1, characterized in that, The geomembrane (1) is an HDPE geomembrane with a basis weight of 300-600 g / m³. 2 The upper geogrid (2) is a polypropylene geogrid or a polyamide geogrid, the lower geogrid (3) is a polypropylene geogrid or a polyamide geogrid, and the glass fiber mesh (4) is an ECR glass fiber mesh.

3. The slope impermeable geomembrane according to claim 1, characterized in that, The glass fiber mesh (4) is composed of intersecting grid strips, with its upper and lower sides flush with or protruding from the corresponding sides of the geomembrane (1); the upper geogrid (2) and the lower geogrid (3) are fixed to the glass fiber mesh (4) by heat sealing, adhesive bonding or welding.

4. The slope impermeable geomembrane according to claim 3, characterized in that, The thickness of the grid strip is 4-8mm, and the thickness of the mesh strip is greater than or equal to the thickness of the grid strip.

5. The slope impermeable geomembrane according to claim 1, characterized in that, The grids of the upper geogrid (2), the lower geogrid (3), and the fiberglass mesh (4) are all rectangular and have a specification of (3-30cm)*(3-30cm).

6. The slope impermeable geomembrane according to claim 1, characterized in that, The lower geogrid (3) has a height of 5-15cm, and the upper geogrid (2) has a height of 8-30cm.

7. The slope impermeable geomembrane according to claim 1, characterized in that, The grids of the upper geogrid (2), the lower geogrid (3), and the fiberglass mesh (4) are all rectangular with dimensions of (5-20cm)*(5-20cm). The geomembrane (1) has a basis weight of 350-550g / m³. 2 The lower geogrid (3) has a height of 10cm, and the upper geogrid (2) has a height of 20cm.

8. A slope seepage prevention structure, comprising a slope base layer and turf; characterized in that, It also includes a slope impermeable geomembrane as described in any one of claims 1-7, wherein the lower geogrid (3) of the slope impermeable geomembrane is inserted on the slope base layer, the geomembrane (1) of the slope impermeable geomembrane covers the surface of the slope base layer, and the upper geogrid (2) of the slope impermeable geomembrane is filled with backfill material, the backfill material being selected from one or more of soil, sand and gravel and its surface is planted with turf.

9. The slope seepage prevention structure according to claim 8, characterized in that, The slope of the slope base layer is less than 1:

3.

10. The slope seepage prevention structure according to claim 8, characterized in that, The backfill material protrudes upwards by 5-15cm relative to the upper geogrid (2).

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