Lap joint structure suitable for geomembranes made of different materials

Abstract

The utility model discloses a lap joint structure suitable for geomembranes of different materials, which comprises a first geomembrane, one end of the first geomembrane is provided with a first T-shaped joint, one side of the first T-shaped joint is provided with an HDPE geomembrane, one side of the HDPE geomembrane is provided with a TPO geomembrane, and a double-weld structure is arranged between the HDPE geomembrane and the TPO geomembrane. A second geomembrane is arranged on one side of the TPO geomembrane, and a second T-shaped connector is arranged at the joint of the TPO geomembrane and the second geomembrane. The structure is suitable for the scene in which geomembranes made of two different materials are selected in projects such as water conservancy and environmental protection, the problems that time and labor are wasted and the anti-seepage effect is poor in traditional mechanical connection of geomembranes made of different materials are solved, the overlapping matching degree between the geomembranes is high, construction is convenient, the overall toughness is good, the service life is long, the construction procedure is simplified, and the construction quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of geomembrane overlap, in particular to an overlap structure suitable for geomembranes made of different materials. Background Art

[0002] Due to its good anti-seepage and moisture-proof properties, geomembranes are widely used in water conservancy, environmental protection and other projects. However, due to the terrain, a single geomembrane is often not selected in the same project. How to connect two geomembranes of different materials and meet the anti-seepage requirements is the focus and difficulty of geomembrane construction. The traditional method is to anchor the two geomembranes of different materials on the corridor by mechanical connection. This method not only requires drilling holes in the corridor and placing bolts, and applying SR anti-seepage strips on the contact surface, but also requires extremely high requirements for the flatness of the corridor concrete. At the same time, geomembranes are flexible materials, and during the anchoring process, they are easy to deform and it is difficult to achieve the required anchoring force. Therefore, those skilled in the art provide a lap joint structure suitable for geomembranes of different materials to solve the problems raised in the above-mentioned background technology. Utility Model Content

[0003] The purpose of the utility model is to provide a geomembrane overlap structure suitable for different materials to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A lap joint structure suitable for geomembranes of different materials includes a first geomembrane, a first T-joint is provided at one end of the first geomembrane, a HDPE geomembrane is provided on one side of the first T-joint, a TPO geomembrane is provided on one side of the HDPE geomembrane, and a double weld structure is provided between the HDPE geomembrane and the TPO geomembrane, a second geomembrane is provided on one side of the TPO geomembrane, and a second T-joint is provided at the connection between the TPO geomembrane and the second geomembrane.

[0006] As a further solution of the present invention: the first geomembrane includes a geotextile and a geomembrane base layer, and a hot melt adhesive layer is provided between the geotextile and the geomembrane base layer.

[0007] As a further solution of the present invention: the first geomembrane is a component made of 1.5mm HDPE material, the second geomembrane is a component made of 1.5mm TPO material, the thickness of the HDPE geomembrane is 1.5mm, and the thickness of the TPO geomembrane is 2mm.

[0008] As a further solution of the present invention: the first T-shaped joint is a component made of HDPE material, and the second T-shaped joint is a component made of TPO material.

[0009] As a further solution of the present invention: the width of the double weld structure is 10 cm.

[0010] As a further solution of the present invention: the outer side surface of the first geomembrane is provided with a corrugated groove, and the rear side surface of the second geomembrane is provided with a corrugated strip matching the corrugated groove.

[0011] As a further solution of the present invention: a double weld structure is provided between adjacent first geomembranes, at the connection between the first geomembrane and the HDPE geomembrane, at the connection between the HDPE geomembrane and the TPO geomembrane, between the TPO geomembrane and the second geomembrane, and between adjacent second geomembranes.

[0012] Compared with the existing technology, the beneficial effects of the present invention are: the structure can connect two geomembranes of different materials by direct welding of transition materials, and a horizontal HDPE geomembrane is added between the two geomembranes. In order to prevent the T-joint from causing a weak point in the project in the same geomembrane, a TPO geomembrane is added horizontally. The overlap between the geomembranes is high. This structure is suitable for scenarios where two geomembranes of different materials are selected in water conservancy, environmental protection and other projects. It solves the problems of time-consuming and labor-intensive mechanical connection of geomembranes of different materials and poor anti-seepage effect. It is easy to construct and has good overall toughness. The service life simplifies the construction process and improves the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of a geomembrane overlap structure suitable for different materials;

[0014] Figure 2 This is a structural schematic diagram of the first geomembrane in a geomembrane overlap structure suitable for different materials.

[0015] In the figure: 1. First geomembrane; 2. First T-joint; 3. HDPE geomembrane; 4. Double weld structure; 5. TPO geomembrane; 6. Second T-joint; 7. Second geomembrane; 8. Geotextile; 9. Hot melt adhesive layer; 10. Geomembrane base layer. DETAILED DESCRIPTION

[0016] See also Figures 1-2In an embodiment of the utility model, a lap joint structure suitable for geomembranes of different materials includes a first geomembrane 1, a first T-joint 2 is provided at one end of the first geomembrane 1, a HDPE geomembrane 3 is provided on one side of the first T-joint 2, a TPO geomembrane 5 is provided on one side of the HDPE geomembrane 3, and a double weld structure 4 is provided between the HDPE geomembrane 3 and the TPO geomembrane 5, and the width of the double weld structure 4 is 10 cm, a second geomembrane 7 is provided on one side of the TPO geomembrane 5, and a second T-joint 6 is provided at the connection between the TPO geomembrane 5 and the second geomembrane 7. This structure can connect two geomembranes of different materials by direct welding of transition materials, and add a horizontal HDPE geomembrane between the two geomembranes. In order to prevent the T-joint from causing a weak point in the project in the same geomembrane, a TPO geomembrane is added horizontally.

[0017] The first geomembrane 1 includes a geotextile 8 and a geomembrane base layer 10 , and a hot melt adhesive layer 9 is provided between the geotextile 8 and the geomembrane base layer 10 .

[0018] The first geomembrane 1 is a component made of 1.5 mm HDPE material, the second geomembrane 7 is a component made of 1.5 mm TPO material, the thickness of the HDPE geomembrane 3 is 1.5 mm, and the thickness of the TPO geomembrane 5 is 2 mm.

[0019] The first T-shaped joint 2 is a component made of HDPE material, and the second T-shaped joint 6 is a component made of TPO material.

[0020] The outer side surface of the first geomembrane 1 is provided with a corrugated groove, and the rear side surface of the second geomembrane 7 is provided with a corrugated strip matching the corrugated groove for easy docking.

[0021] Double weld structures 4 are provided between adjacent first geomembranes 1, at the connection between the first geomembrane 1 and the HDPE geomembrane 3, at the connection between the HDPE geomembrane 3 and the TPO geomembrane 5, between the TPO geomembrane 5 and the second geomembrane 7, and between adjacent second geomembranes 7 to enhance permeability.

[0022] The working principle of this utility model is: this structure is suitable for the overlapping of geomembranes of different materials, that is, the direct welding method through transition materials. It consists of 1.5mmHDPE geomembrane, T-joint (XHDPE), 1.5mmXHDPE geomembrane, 2.0mmTPO geomembrane, T-joint (TPO), 1.5mmTPO geomembrane and double welds. When implemented specifically: before formal welding, trial welding is required, and the welding temperature, welding pressure and driving speed are selected according to the ambient temperature. The trial welding seam samples are sampled for shear and peel tests. After meeting the requirements, the welding temperature, welding pressure and driving speed can be determined; keep the working surface clean and flat , and there are no hard objects such as steel bars and stones that can easily damage the geomembrane. A three-dimensional composite drainage net is laid on the working surface. The gaps between the drainage nets are firmly tied with cable ties, and the geotextiles are connected by hot air welding; XHDPE geomembrane and TPO geomembrane are laid horizontally on the three-dimensional composite drainage net; the two geomembranes are overlapped by 10 cm, and overlapped by 10 cm with the geomembranes on both sides at the same time; all geomembrane overlaps are wiped clean with a dry rag to ensure that there is no dust and water droplets on the welding contact surface; double welds are used for geomembrane connections, and the T-joint welds must be patched and strengthened; the welds and T-joints are checked for airtightness by pressing and vacuuming respectively to ensure the firmness of the welding.

[0023] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A geomembrane overlap structure suitable for geomembranes of different materials, comprising a first geomembrane (1), characterized in that: A first T-joint (2) is provided at one end of the first geomembrane (1), a HDPE geomembrane (3) is provided on one side of the first T-joint (2), a TPO geomembrane (5) is provided on one side of the HDPE geomembrane (3), and a double weld structure (4) is provided between the HDPE geomembrane (3) and the TPO geomembrane (5), a second geomembrane (7) is provided on one side of the TPO geomembrane (5), and a second T-joint (6) is provided at the connection between the TPO geomembrane (5) and the second geomembrane (7).

2. The overlapping structure of geomembranes of different materials according to claim 1 is characterized in that: The first geomembrane (1) comprises a geotextile (8) and a geomembrane base layer (10), and a hot melt adhesive layer (9) is provided between the geotextile (8) and the geomembrane base layer (10).

3. The overlapping structure of geomembranes of different materials according to claim 1 is characterized in that: The first geomembrane (1) is a component made of 1.5 mm HDPE material, the second geomembrane (7) is a component made of 1.5 mm TPO material, the thickness of the HDPE geomembrane (3) is 1.5 mm, and the thickness of the TPO geomembrane (5) is 2 mm.

4. The overlapping structure of geomembranes of different materials according to claim 1 is characterized in that: The first T-shaped joint (2) is a component made of HDPE material, and the second T-shaped joint (6) is a component made of TPO material.

5. The overlapping structure of geomembranes of different materials according to claim 1 is characterized in that: The width of the double weld structure (4) is 10 cm.

6. The overlapping structure of geomembranes of different materials according to claim 1 is characterized in that: The outer side surface of the first geomembrane (1) is provided with a corrugated groove, and the rear side surface of the second geomembrane (7) is provided with a corrugated strip matching the corrugated groove.

7. The overlapping structure of geomembranes of different materials according to claim 1 is characterized in that: Double weld structures (4) are provided between adjacent first geomembranes (1), at the connection between the first geomembrane (1) and the HDPE geomembrane (3), at the connection between the HDPE geomembrane (3) and the TPO geomembrane (5), between the TPO geomembrane (5) and the second geomembrane (7), and between adjacent second geomembranes (7).

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