Geomembrane breathable anchoring structure

Abstract

The utility model provides a geomembrane breathable anchoring structure which comprises a pool bottom and a side slope, a riding track is arranged on the side slope, and a base layer, a bentonite waterproof blanket, a geomembrane and non-woven geotextile are sequentially arranged on the pool bottom and the side slope from bottom to top. Wherein a concrete anchoring plate is arranged on the upper layer of the geomembrane located at the riding track, an elbow deformed steel bar is arranged in the concrete anchoring plate, and the geomembrane is pressed at the bottom of the concrete anchoring plate by the elbow deformed steel bar; a gas-guide tube is arranged at the edge of the pool bottom, the bottom end of the gas-guide tube is located on the lower layer of the geomembrane, the other end of the gas-guide tube is located on the upper layer of the geomembrane, and the geomembrane is connected with the gas-guide tube through full welding. According to the utility model, the concrete anchoring plate is adopted to replace the traditional structure form of excavating an anchoring groove, so that on one hand, the construction difficulty is greatly simplified, the concrete consumption of the concrete anchoring plate is less than that of excavating the groove, large equipment assistance is not needed during manufacturing, and the construction quality of the riding track can be kept.

Description

TECHNICAL FIELD

[0001] The utility model belongs to geomembrane field relates to a kind of geomembrane ventilation anchoring structure. BACKGROUND

[0002] At present, there is a "closed gas-permeable" contradiction in the anti-seepage film in the anti-seepage engineering of landfill, underground pipe gallery, tailings pond and the like. The traditional anchoring trench on the film is mostly in the form of right-angled rectangle or steep slope trapezoid (such as 0.8m deep and 0.5m wide). For example, a Chinese patent with publication number CN201334669Y discloses an anchoring structure of geomembrane for anti-seepage of initial dam top of tailings pond. The patent needs to excavate a groove on one side of the inner slope of the dam body requiring anti-seepage on the initial dam, lay the geomembrane along the inner wall of the groove, and pour a landfill concrete layer on the geomembrane. The landfill concrete layer fills the entire groove. However, this type of anchoring form forms a stress concentration area at the turning point of the film material, which is prone to breakage under temperature difference (±30℃) or slope creep (annual displacement >5mm).

[0003] On the other hand, this type of anchoring scheme has great construction difficulty. Taking a certain phosphogypsum resource concentration pond as an example, the horse path is only 4m wide. If the traditional scheme is used to excavate the anchoring trench, the horse path after excavation cannot be used for construction by large machinery. This not only causes difficulty in subsequent anti-seepage construction, but also requires a large amount of manpower, material resources and time cost for backfilling of the anchoring trench, which seriously affects the construction progress. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at the defects of the prior art and provides a geomembrane ventilation anchoring structure based on the concept of "controllable ventilation and precise anti-seepage". Through hierarchical design of the structure, safe discharge of gas is realized while maintaining the integrity of the anti-seepage layer.

[0005] The technical purpose of the utility model is achieved through the following technical scheme.

[0006] A geomembrane ventilation anchoring structure includes a pool bottom and a slope. A horse path is provided on the slope. The pool bottom and the slope are sequentially provided from bottom to top with a foundation layer, a bentonite waterproof blanket, a geomembrane and a non-woven geotextile. A concrete anchoring plate is provided on the upper layer of the geomembrane at the horse path. Elbow threaded steel is provided in the concrete anchoring plate. The geomembrane is pressed at the bottom of the concrete anchoring plate by the elbow threaded steel. A gas guide pipe is provided at the edge of the pool bottom. The bottom end of the gas guide pipe is located at the lower layer of the geomembrane, and the other end is located at the upper layer of the geomembrane. The geomembrane is fully welded to the gas guide pipe.

[0007] Preferably, the slope of the slope is 1:1.25-1:2.5.

[0008] Preferably, the thickness of the geomembrane is not less than 2mm.

[0009] Preferably, the lap joint of the geomembrane is arranged at the bottom of the concrete anchoring plate.

[0010] Preferably, the thickness of the concrete anchoring plate is not less than 18 cm, and the width is not less than 240 cm.

[0011] Preferably, the air guide pipe is a high-density polyethylene pipe with a wall thickness of 3-5 mm, and is arranged uniformly along the edge of the pool bottom at intervals of 5-8 m.

[0012] Compared with the prior art, the geomembrane air-permeable anchoring structure has the following beneficial effects:

[0013] The geomembrane air-permeable anchoring structure provided by the utility model adopts a concrete anchoring plate to replace the structure form of a traditional excavated anchoring groove, which greatly simplifies construction difficulty, and the consumption of concrete by the concrete anchoring plate is less than that of excavated grooves, and large equipment is not needed during production, so that the construction quality of the horse path can be maintained.

[0014] The geomembrane air-permeable anchoring structure provided by the utility model is provided with an air guide pipe at the edge of the pool bottom, and the pipe opening of the air guide pipe extends into the geomembrane, so that the pool bottom water vapor, ground gas and the like can be discharged, and the risk of rupture of the geomembrane due to pressure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the utility model.

[0016] Figure 2 It is a structural schematic view of the utility model. Figure 1 It is an enlarged structural schematic view of the A part.

[0017] Figure 3 It is a structural schematic view of the air guide pipe in the utility model.

[0018] Figure 4 It is a connection state schematic view of the elbow threaded steel and the geomembrane in the utility model.

[0019] In the above figure: 1, pool bottom; 2, slope; 3, horse path; 4, foundation layer; 5, bentonite waterproof blanket; 6, geomembrane; 7, non-woven geotextile; 8, concrete anchoring plate; 9, elbow threaded steel; 10, air guide pipe. DETAILED DESCRIPTION

[0020] In order to make the technical scheme of the utility model better understood by the skilled in the art, the preferred embodiment of the utility model is described below in combination with specific embodiments, but it should be understood that the drawings are only used for illustrative description and cannot be understood as a limitation on the patent; in order to better illustrate the embodiments, some components in the drawings will be omitted, enlarged or reduced, and the size of the actual product is not represented; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted; the positional relationship described in the drawings is only used for illustrative description and cannot be understood as a limitation on the patent.

[0021] The utility model is with a phosphorus gypsum resource centralized library as an experimental point, the library area is a second-class library, mainly used for the stacking of phosphorus slag, and has a high requirement for anti-seepage. The stacking yard needs to be well anti-seepage, and at the same time, gas is discharged, and the effect of membrane inner and outer pressure balance is made.

[0022] As an embodiment of the utility model, reference is made to the accompanying Figures 1-4 The embodiment provides a geomembrane air-permeable anchoring structure, which comprises a pool bottom 1 and a slope 2, a horse path 3 is arranged on the slope 2, and the pool bottom 1 and the slope 2 are sequentially provided with a foundation layer 4, a 5000g / m2 sodium-based bentonite waterproof blanket 5, a 2mm-thick HDPE single rough surface geomembrane 6 and a non-woven geotextile 7 from bottom to top; wherein a concrete anchoring plate 8 is arranged on the upper layer of the geomembrane at the horse path 3, a bend threaded steel 9 is arranged in the concrete anchoring plate 8, and the geomembrane 6 is pressed on the bottom of the concrete anchoring plate 8 by the bend threaded steel 9; a Φ50 HDPE gas guide pipe 10 is arranged at the edge of the pool bottom 1, the bottom end of the gas guide pipe 10 is located on the lower layer of the geomembrane, the other end is located on the upper layer of the geomembrane, and the geomembrane is fully welded with the gas guide pipe 10.

[0023] During construction, hot melt welding, lap and other forms are used at the overlapping part of the geomembrane to reinforce, so as to ensure the continuity and integrity of the anti-seepage layer; the gas guide pipe 10 forms an air-permeable channel between the pool bottom geomembrane and the slope geomembrane, so as to ensure the internal and external air pressure balance. The concrete anchoring plate 8 is constructed by using a formwork method, the formwork is first supported, then the concrete is prepared and poured into the formwork, a vibrating rod is used for vibrating and compacting, then a trowel is used to smooth the surface of the concrete, after the initial setting of the concrete, maintenance is carried out, the surface of the concrete is kept wet, and the maintenance time is determined according to the strength requirement of the concrete and the weather condition; after the concrete reaches the design strength, the formwork is removed, quality inspection is carried out, the pressed top surface is ensured to be flat, free of cracks and falling-off phenomenon, and the expansion joint is cut.

[0024] The above embodiment adopts a new geomembrane anchoring scheme, replaces the traditional anchoring scheme using an anchoring trench, so that the geomembrane is no longer bent at a right angle or a large angle, and the defect that the membrane material forms a stress concentration area at the turning part in the traditional scheme is overcome.

[0025] On the anchoring groove, the direct use of coping concrete and steel anchoring on the horse track can effectively prevent the anti-seepage material from sliding down and also play an anchoring role, greatly saving manpower and material resources; the combination of non-woven geotextile and air duct is practical, with a gas permeability rate of ≥0.01 m³ / (m²·d), effectively solving the problem of cracking of the traditional scheme of the pool bottom geotextile under the water vapor pressure of the membrane.

[0026] In some embodiments, the slope of the slope 2 is 1:1.25-1:2.5. This slope range balances structural stability and space occupation. A steeper slope such as 1:1.25 can reduce the amount of excavation and is suitable for space-limited scenarios; a gentler slope such as 1:2.5 can reduce the risk of landslides and enhance the overall stability of the slope, especially suitable for soft soil or high water level areas.

[0027] In some preferred embodiments, to enhance the resistance to penetration, puncture and aging, and suitable for long-term exposure or high-stress environments, the thickness of the geomembrane 6 in this embodiment is not less than 2 mm.

[0028] In order to increase its waterproofness, in this embodiment, the lap joint of the geomembrane 6 is arranged at the bottom of the concrete anchoring plate 8.

[0029] The mechanical pressing effect of the concrete anchoring plate 9 on the lap joint in the above embodiment can reduce the risk of peeling at the joint due to external force or settlement, while avoiding direct exposure to the external environment, reducing the probability of leakage.

[0030] In some embodiments, in order to improve the anchoring performance, the thickness of the concrete anchoring plate 8 in this embodiment is not less than 18 cm, and the width is not less than 240 cm. The use of large-size concrete anchoring plate 8 can improve the shear resistance and overall stability, especially suitable for high slopes or high water pressure scenarios.

[0031] In some preferred embodiments, the air duct 10 is a high-density polyethylene pipe with a wall thickness of 3-5 mm, and is uniformly arranged along the edge of the pool bottom at an interval of 5-8 m. The HDPE pipe is corrosion-resistant and has high compressive strength, and the wall thickness of 3-5 mm can withstand the soil pressure on the top layer of the geomembrane; a reasonable interval of 5-8 m can ensure uniform gas discharge and avoid local gas pressure accumulation leading to membrane bulging or tearing.

[0032] Compared with the traditional scheme, the above embodiments have the following advantages:

[0033] Improve construction efficiency: standardized construction steps and technical requirements can reduce the difficulty of anchoring construction, shorten the construction period, and improve the construction efficiency.

[0034] Enhanced structural stability: The combination of membrane material and concrete road anchor rod anchoring effectively improves the stability and durability of the top of the building structure.

[0035] Aesthetic building appearance: The selection and installation of the membrane material make the top of the building structure more beautiful, enhancing the artistic effect of the overall building.

[0036] Cost reduction: By optimizing the construction process and material selection, the construction cost is reduced, and the economic benefit of the project is improved.

[0037] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application. The technical solutions should be covered in the scope of the claims of the present application.

Claims

1. A geomembrane air permeable anchoring structure comprising a pond bottom and a slope, a horse path being provided on the slope, characterized in that: The bottom and the slope of the pool are sequentially provided with a foundation layer, a bentonite waterproof blanket, a geomembrane and a non-woven geotextile from bottom to top; wherein the upper layer of the geomembrane at the horse path is provided with a concrete anchoring plate, a bent thread steel is arranged in the concrete anchoring plate, and the geomembrane is pressed at the bottom of the concrete anchoring plate by the bent thread steel; a gas guide pipe is arranged at the edge of the pool bottom, the bottom end of the gas guide pipe is located below the lower layer of the geomembrane, the other end is located above the upper layer of the geomembrane, and the geomembrane is full-welded with the gas guide pipe.

2. A geomembrane air permeable anchoring structure according to claim 1, wherein: The slope of the slope is 1:1.25-1:2.

5.

3. The geomembrane air permeable anchoring structure according to claim 1, wherein: The thickness of the geomembrane is not less than 2mm.

4. The geomembrane air permeable anchoring structure according to claim 1, wherein: The lap joint of the geomembrane is arranged at the bottom of the concrete anchoring plate.

5. The geomembrane air permeable anchoring structure according to claim 1, wherein: The thickness of the concrete anchoring plate is not less than 18cm, and the width is not less than 240cm.

6. The geomembrane air permeable anchoring structure according to claim 1, wherein: The gas guide pipe is a high-density polyethylene pipe, the pipe wall thickness is 3-5mm, and the pipe is uniformly arranged along the edge of the pool bottom at intervals of 5-8m.

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