An efficient drainage anti-seepage geomembrane and drainage anti-seepage structure

Abstract

The utility model relates to the field of engineering construction waterproof technology discloses a kind of efficient drainage's anti-seepage geomembrane and drainage anti-seepage structure, including membrane body, lap joint area and rib, the lap joint area is located in the both sides of membrane body, several mutually parallel the rib is located on the upper surface of membrane body and protrudes from membrane body setting, form a drainage channel between the adjacent two rib, the membrane body, lap joint area and rib integrally are arranged, the length direction of rib can be same or perpendicular with the length direction of geomembrane.The utility model makes several mutually parallel ribs on geomembrane surface, drainage channel can be formed between adjacent two ribs;And benefit from simple production process, the length direction of rib and the length direction of geomembrane can be same or perpendicular, so that the anti-seepage geomembrane can be flexibly applied to various engineering environments, and stable play drainage anti-seepage effect, with simple and reliable structure, manufacturing and using cost is low, and the advantages such as wide application range.

Description

Technical Field

[0001] This utility model relates to the field of waterproofing technology in engineering construction, and in particular to a high-efficiency drainage impermeable geomembrane and a drainage and seepage prevention structure using the impermeable geomembrane. Background Technology

[0002] Geomembrane is a waterproof barrier material made from high molecular polymers. It is often used as a seepage prevention substrate in seepage prevention engineering.

[0003] Taking railway and highway subgrade waterproofing projects as an example, if surface water seeps into the subgrade and cannot be drained in time, it can lead to subgrade frost heave and mud pumping, increasing subgrade maintenance and repair work and posing a threat to safe passage. To address this, some structures have emerged capable of draining water that has seeped into the subgrade. For example, Chinese patent CN217810585U, "Porous Drainage Strip," discloses a porous drainage strip comprising a drainage strip body, a lower geotextile, and an upper geotextile. The upper geotextile is located on top of the drainage strip body, and the lower geotextile is located on the bottom. A geomembrane is installed below the drainage strip body, and the interior of the drainage strip body has evenly distributed drainage channels. Groundwater can enter the drainage channels and be discharged along them, thereby draining the water from the subgrade, improving soil stability, and ensuring the stability and compressive strength of the highway.

[0004] However, this type of drainage strip has many structures, complex manufacturing processes, and high costs, which limits its application in some projects that require a large number of drainage strips. Therefore, it is necessary to develop a drainage and seepage prevention structure that has drainage and seepage prevention functions while having a simpler structure and manufacturing process and lower cost. Utility Model Content

[0005] Addressing the problems existing in the prior art: current drainage and seepage prevention structures are complex in structure and have high manufacturing and usage costs. The purpose of this utility model is to provide a high-efficiency drainage and seepage prevention geomembrane and a drainage and seepage prevention structure using the geomembrane. By creating several parallel ribs on the surface of the geomembrane, a drainage channel can be formed between two adjacent ribs. Furthermore, thanks to the simple production process, the length direction of the ribs can be the same as or perpendicular to the length direction of the geomembrane, thus making the geomembrane flexibly applicable to various engineering environments and stably performing drainage and seepage prevention functions. It has the advantages of simple and reliable structure, low manufacturing and usage costs, and wide applicability, making it convenient for large-scale promotion and application.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A high-efficiency drainage impermeable geomembrane includes a membrane body, an overlapping area, and reinforcing bars. The overlapping area is located on both sides of the membrane body. Several parallel reinforcing bars are located on the upper surface of the membrane body and protrude from the membrane body. A drainage channel is formed between two adjacent reinforcing bars. The membrane body, overlapping area, and reinforcing bars are integrally formed. The length direction of the reinforcing bars can be the same as or perpendicular to the length direction of the geomembrane.

[0007] The present invention is further configured such that: the height of the reinforcing bar is h, and the height of the geomembrane is H, then H=n*h, and the value of n is in the range of 3-5.

[0008] The present invention is further configured such that: the width of the rib is a, the width of the drainage channel is b, and the height of the rib is h, then a=b=2h.

[0009] The present invention is further configured such that: when the length direction of the reinforcing bar is the same as the length direction of the geomembrane, the length of the reinforcing bar is the same as the length of the geomembrane; when the length direction of the reinforcing bar is perpendicular to the length direction of the geomembrane, the length of the reinforcing bar is the same as the width of the geomembrane.

[0010] The present invention is further configured such that: a fastening area with the same length as the overlapping area is provided on the overlapping area; when two overlapping areas facing each other on two adjacent geomembranes overlap each other, all fastening areas on the two overlapping areas are tightly attached to each other and fixed.

[0011] The present invention is further configured such that: the fastening area includes a connector and a socket, the socket is located on the upper surface of the overlapping area, the connector is located on the lower surface of the overlapping area and directly below the socket, and the shape and size of the connector are adapted to the socket.

[0012] The present invention is further configured such that: each of the overlapping areas is provided with two fastening areas, and each of the fastening areas is provided with multiple connectors and sockets.

[0013] The present invention is further configured such that: a retaining ring is provided on the outer edge of the connector, and a retaining groove adapted to the retaining ring is provided in the socket.

[0014] The present invention is further configured such that: the distance between the slot and the upper surface of the overlapping area is x1, and the distance between the ring and the bottom surface of the overlapping area is x2, then x1>x2.

[0015] This utility model also discloses a drainage and seepage prevention structure, including a filter geotextile layer, a geotextile protective layer, and a grid reinforcement layer, as well as a high-efficiency drainage and seepage prevention geomembrane as described above. The geomembrane is located between the filter geotextile layer and the geotextile protective layer, with the filter geotextile layer located above the geomembrane and the grid reinforcement layer located below the geotextile protective layer.

[0016] In summary, the beneficial effects achieved by this utility model are as follows: (1) Reinforcing bars are directly installed on the geomembrane with impermeability function. The reinforcing bars and the membrane body cooperate to form a drainage channel on the upper surface of the geomembrane. The geomembrane alone can achieve both impermeability and drainage without other structures, which is simple in structure. Furthermore, the membrane body, overlapping area and reinforcing bars on the geomembrane are all integrated, which simplifies the manufacturing process and effectively reduces production and usage costs, resulting in high economic benefits. (2) Since the length of the geomembrane used in different engineering environments is often much greater than the width, but the drainage direction required by different engineering environments is not the same, the drainage channel on the geomembrane that can flexibly change the drainage direction can make the geomembrane of this utility model flexibly applied to different engineering environments; and, thanks to the simple manufacturing process of the integrated design, the geomembrane of this utility model can still achieve the change of the length direction of the drainage channel while maintaining low cost. (3) A fastening area is set in the overlapping area so that the two geomembranes can be aligned and kept flat when they are overlapped and fixed, preventing edge curling and misalignment, and facilitating on-site construction and fixing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a side view of the impermeable geomembrane in Embodiment 1 of this utility model; Figure 2 This is a top view of the impermeable geomembrane in Embodiment 1 of this utility model; Figure 3 for Figure 2 A magnified view of part A in the middle; Figure 4 This is a partial structural schematic diagram of the impermeable geomembrane in Embodiment 1 of this utility model; Figure 5 This is a top view of the impermeable geomembrane in Embodiment 2 of this utility model; Figure 6 This is a top view of the impermeable geomembrane in Embodiment 3 of this utility model; Figure 7 This is a schematic diagram of the overlapping area on the impermeable geomembrane in Embodiment 3 of this utility model. Figure 1 ; Figure 8This is a schematic diagram of the overlapping area on the impermeable geomembrane in Embodiment 3 of this utility model. Figure 2 ; Figure 9 This is a structural schematic diagram of the overlapping state of the impermeable geomembrane in Embodiment 3 of this utility model; Figure 10 This is a schematic diagram of the drainage and seepage prevention structure in Embodiment 4 of this utility model when applied in a roadbed; Figure 11 This is a schematic diagram of the drainage and seepage prevention structure in Embodiment 4 of this utility model when applied to a slope or pit bottom; Figure 12 This is a schematic diagram of the drainage and seepage prevention structure in embodiment four of this utility model when applied in a tunnel.

[0019] In the diagram: 1. Geomembrane; 11. Membrane body; 12. Overlap area; 121. Fastening area; 1211. Insertion joint; 12111. Clip; 1212. Insertion hole; 12121. Slot; 13. Reinforcing bar; 14. Drainage channel; 2. Filter geotextile layer; 3. Geotextile protective layer; 4. Grid reinforcement layer. Detailed Implementation

[0020] 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, not all embodiments. For ease of explanation, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc., used in this specification to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] It should be noted that the embodiments and features involved in the embodiments of this utility model can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0022] Example 1

[0023] As attached Figure 1-3 As shown, a high-efficiency drainage impermeable geomembrane includes a membrane body 11, an overlap area 12, and reinforcing bars 13.

[0024] Existing geomembranes are typically 50 to 100 meters long per roll, and their materials are mainly classified as: low-density polyethylene (LDPE) geomembrane, high-density polyethylene (HDPE) geomembrane, and EVA geomembrane. The geomembrane in this invention can be made of HDPE material, and its length is also 50-100 meters, but it can also be customized according to actual needs. Therefore, the length of the geomembrane is often much greater than its width.

[0025] The membrane body 11, the overlapping area 12, and the reinforcing strip 13 are integrally formed during manufacturing. In this embodiment, the length direction of the three is the same as the length direction of the geomembrane 1, and the length of the three is the same as the length of the geomembrane 1.

[0026] In the width direction of the geomembrane 1, the membrane body 11 is located at the center of the geomembrane 1, and the overlapping area 12 is located on both sides of the membrane body 11. In this embodiment, the thickness of the membrane body 11 is the same as the thickness of the overlapping area 12.

[0027] The reinforcing bars 13 are located on the upper surface of the membrane body 11 and protrude from the membrane body 11. A drainage channel 14 of the same length as the geomembrane 1 can be formed between two adjacent reinforcing bars 13. Several parallel reinforcing bars 13 arranged at equal intervals form several drainage channels 14 with the same drainage direction on the upper surface of the membrane body 11.

[0028] As attached Figure 4 As shown, the cross-sectional shape of the reinforcing bar 13 is rectangular in the width direction of the geomembrane 1, therefore the cross-sectional shape of the drainage channel 14 is also rectangular. In some other embodiments, by changing the shape of the reinforcing bar 13, the cross-sectional shape of the drainage channel 14 can be made to present various shapes that are conducive to drainage, such as U-shape, dovetail shape, trapezoidal shape, etc.

[0029] When the geomembrane 1 of this utility model is laid in actual engineering, the side where the reinforcing bars 13 are located faces upward. The geomembrane 1 itself has the function of preventing seepage, and the water that seeps into the geomembrane 1 can be discharged through the drainage channel 14. Thus, the geomembrane 1 alone can achieve both the functions of preventing seepage and drainage.

[0030] To maximize drainage efficiency, ensure the service life of the reinforcing rib 13, and save manufacturing costs, the dimensions of the reinforcing rib 13 and the spacing of the drainage channels 14 can be determined with reference to the following numerical relationships: Let the height of reinforcing bar 13 be denoted as h, and the height of geomembrane 1 as H. Then H = n * h, where the value of n ranges from 3 to 5. That is, the height of geomembrane 1 is 3 to 5 times the height of reinforcing bar 13.

[0031] Meanwhile, let a be the width of the reinforcing bar 13 and b be the width of the drainage channel 14. Then a = b = 2h, meaning that the width of the reinforcing bar 13 and the width of the drainage channel 14 are equal and both are twice the height of the reinforcing bar 13.

[0032] Example 2

[0033] As attached Figure 5 As shown, this utility model discloses a high-efficiency drainage impermeable geomembrane. Unlike the first embodiment, the length direction of the reinforcing bar 13 is not the same as the length direction of the geomembrane 1, but perpendicular to it.

[0034] Because of the simple manufacturing process in which the membrane body 11, the overlapping area 12 and the ribs 13 are integrally formed during manufacturing, the length direction of the ribs 13 on the membrane body 11 can be changed simply by adjusting the equipment, and it can also be manufactured using low cost.

[0035] At this point, the length of the reinforcing bar 13 is the same as the width of the geomembrane 1, the length direction of the drainage channel 14 is perpendicular to the length direction of the geomembrane 1, and the overlap area 12 is located at both ends of the length direction of the geomembrane 1. In this embodiment, the geomembrane 1 can meet the needs of engineering environments where the drainage direction is different from the length direction of the geomembrane 1.

[0036] Example 3

[0037] As attached Figure 6-9 As shown, this utility model discloses a high-efficiency drainage impermeable geomembrane. Unlike the first embodiment, the overlapping area 12 is provided with a fastening area 121 of the same length as the overlapping area 12.

[0038] The fastening area 121 is a portion of the overlapping area 12. In the prior art, after the geomembrane is laid, the overlapping areas 12 of two adjacent geomembranes 1 need to be overlapped and fixed by adhesive or welding. However, the edges of the overlapping area 12 often curl up or misalign, resulting in incomplete overlap and affecting the seepage prevention effect of the geomembrane 1.

[0039] Each overlapping area 12 has a long strip-shaped fastening area 121 at each end in the width direction. When the two overlapping areas 12 on the two geomembranes 1 overlap each other, all the fastening areas 121 on the two overlapping areas 12 are tightly attached to each other and fixed, thereby forming a strong positioning and stretching leveling effect, which makes it easy to fix the overlapping area 12.

[0040] Specifically, the fastening area 121 is provided with a plurality of connectors 1211 and sockets 1212 arranged in a straight line. The sockets 1212 are located on the upper surface of the overlapping area 12, and the connectors 1211 are located on the lower surface of the overlapping area 12 and directly below the sockets 1212. Furthermore, the shape and size of the connectors 1211 are adapted to the sockets 1212, both being cylindrical. Therefore, when two overlapping areas 12 overlap, by inserting the connectors 1211 on the lower surface of the upper overlapping area 12 into the sockets 1212 on the lower overlapping area 12, the two overlapping areas 12 can be positioned and pre-fixed. Simultaneously, the overlapping areas 12 also have a stretching and flattening effect, facilitating subsequent bonding or welding fixation.

[0041] In some other embodiments, when the overlap area 12 is thicker, the depth of the insertion hole 1212 is also greater. In this case, an annular retaining ring 12111 can be provided on the outer edge of the connector 1211, and correspondingly, an annular retaining groove 12121 adapted to the retaining ring 12111 is provided inside the insertion hole 1212. Furthermore, in the vertical direction, the retaining ring 12111 is located in the upper-middle part of the connector 1211, and the retaining groove 12121 is also located in the upper-middle part of the insertion hole 1212. Thus, when the connector 1211 is inserted into the insertion hole 1212, the retaining ring 12111 expands the top of the insertion hole 1212 and enters and engages in the retaining groove 12121, thereby strengthening the fixing strength between the connector 1211 and the insertion hole 1212.

[0042] Furthermore, as attached Figure 8 As shown, the distance between the slot 12121 and the upper surface of the overlapping area 12 is denoted as x1, and the distance between the retaining ring 12111 and the bottom surface of the overlapping area 12 is denoted as x2. Then x1>x2, so that after the retaining ring 12111 enters the slot 12121, the bottom surface of the upper overlapping area 12 and the top surface of the lower overlapping area 12 can be in full and tight contact.

[0043] Meanwhile, let y1 be the depth of the socket 1212 and y2 be the height of the connector 1211. Then y1>y2, thus ensuring that the connector 1211 can be fully inserted into the socket 1212.

[0044] Example 4

[0045] As attached Figure 10-12 As shown, this utility model discloses a drainage and seepage prevention structure, including a filter geotextile layer 2, a geotextile protective layer 3, a grid reinforcement layer 4, and the high-efficiency drainage and seepage prevention geomembrane in Examples 1-3. This drainage and seepage prevention structure can be applied as shown in the attached figure. Figure 10 The illustration shows roadbed drainage and seepage prevention scenarios in highway and railway engineering, and the attached diagram. Figure 11 The diagram shows a seepage prevention and drainage scenario for the slope, pit bottom, and foundation, as well as the attached diagram. Figure 12 The tunnel project shown.

[0046] The filter geotextile layer 2, geotextile protective layer 3, and geogrid reinforcement layer 4 are all existing technologies. The filter geotextile layer 2 is located above the geomembrane 1 and can filter sand, gravel, silt, etc., preventing them from clogging the drainage channels 14 on the geomembrane 1. The geomembrane 1 is located between the filter geotextile layer 2 and the geotextile protective layer 3, and the geogrid reinforcement layer 4 is located below the geotextile protective layer 3. The combined use of the geotextile protective layer 3 and the geogrid reinforcement layer 4 can increase the stability of the overall engineering structure.

[0047] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and modifications.

Claims

1. A high-efficiency drainage and impermeable geomembrane, characterized in that, It includes a membrane body (11), an overlap area (12) and reinforcing bars (13). The overlap area (12) is located on both sides of the membrane body (11). Several parallel reinforcing bars (13) are located on the upper surface of the membrane body (11) and protrude from the membrane body (11). A drainage channel (14) is formed between two adjacent reinforcing bars (13). The membrane body (11), overlap area (12) and reinforcing bars (13) are integrally formed. The length direction of the reinforcing bars (13) can be the same as or perpendicular to the length direction of the geomembrane (1).

2. The high-efficiency drainage impermeable geomembrane according to claim 1, characterized in that, The height of the reinforcing bar (13) is h, and the height of the geomembrane (1) is H. Then H = n * h, and the value of n is in the range of 3-5.

3. The high-efficiency drainage impermeable geomembrane according to claim 1, characterized in that, The width of the rib (13) is a, the width of the drainage channel (14) is b, and the height of the rib (13) is h, then a=b=2h.

4. The high-efficiency drainage impermeable geomembrane according to claim 1, characterized in that, When the length direction of the reinforcing bar (13) is the same as the length direction of the geomembrane (1), the length of the reinforcing bar (13) is the same as the length of the geomembrane (1); when the length direction of the reinforcing bar (13) is perpendicular to the length direction of the geomembrane (1), the length of the reinforcing bar (13) is the same as the width of the geomembrane (1).

5. The high-efficiency drainage impermeable geomembrane according to claim 1, characterized in that, The overlapping area (12) is provided with a fastening area (121) of the same length as the overlapping area (12). When two overlapping areas (12) on two adjacent geomembranes (1) overlap each other, all the fastening areas (121) on the two overlapping areas (12) are tightly attached to each other and fixed.

6. The high-efficiency drainage impermeable geomembrane according to claim 5, characterized in that, The fastening area (121) includes a connector (1211) and a socket (1212). The socket (1212) is located on the upper surface of the overlapping area (12), and the connector (1211) is located on the lower surface of the overlapping area (12) and directly below the socket (1212). The shape and size of the connector (1211) are adapted to the socket (1212).

7. The high-efficiency drainage impermeable geomembrane according to claim 6, characterized in that, Each of the overlapping areas (12) is provided with two fastening areas (121), and each of the fastening areas (121) is provided with multiple connectors (1211) and sockets (1212).

8. The high-efficiency drainage impermeable geomembrane according to claim 6, characterized in that, A retaining ring (12111) is provided on the outer edge of the connector (1211), and a retaining groove (12121) adapted to the retaining ring (12111) is provided in the socket (1212).

9. The high-efficiency drainage impermeable geomembrane according to claim 8, characterized in that, The distance between the slot (12121) and the upper surface of the overlapping area (12) is x1, and the distance between the retaining ring (12111) and the bottom surface of the overlapping area (12) is x2, then x1> x2.

10. A drainage and seepage prevention structure, comprising a filter geotextile layer (2), a geotextile protective layer (3), and a grid reinforcement layer (4), characterized in that, It also includes a high-efficiency drainage impermeable geomembrane as described in any one of claims 1-9, wherein the geomembrane (1) is located between the filter geotextile layer (2) and the geotextile protective layer (3), the filter geotextile layer (2) is located above the geomembrane (1), and the grid reinforcement layer (4) is located below the geotextile protective layer (3).

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