Reservoir structure adopting polyurea for seepage prevention

Abstract

The utility model relates to a reservoir structure adopting polyurea for seepage prevention. The reservoir structure mainly comprises a reservoir, a protective layer and a polyurea seepage prevention layer, the reservoir is formed by excavating or enclosing a soil body, the reservoir comprises a reservoir bottom, a reservoir bank and a top retaining wall, the surfaces of the reservoir bottom and the reservoir bank are soil foundation layers, and the top retaining wall is arranged on the side, away from the reservoir bottom, of the reservoir bank in a surrounding mode; the protective layer is arranged on the surface of the soil foundation layer, the protective layer is made of rolling mortar, the laying thickness of the rolling mortar is about 10 cm, and the protective layer is provided with a structural joint concaved inwards in the protective layer; and the polyurea impermeable layer is sprayed on the surface of the protective layer. According to the reservoir structure adopting the polyurea for seepage prevention, high-requirement construction and welding of a geomembrane seepage prevention structure are avoided, and the reservoir structure has high impact resistance and high external force damage resistance.

Description

Technical Field

[0001] This application relates to the technical field of reservoir engineering, and particularly to a reservoir structure with polyurea anti-seepage. Background Art

[0002] After a large reservoir formed by excavating a deep pit in the soil body or filling it with soil is filled with water, the deformation is relatively large. In order to ensure the anti-seepage effect, a geomembrane is generally used for anti-seepage. However, the geomembrane needs to be welded, and it is difficult to control the quality of the weld. In addition, under high water heads, the geomembrane has high requirements for the flatness of the bottom support layer, and a fine-grained leveling layer needs to be filled. Therefore, an anti-seepage structure that can reduce the construction difficulty and effectively prevent seepage is needed to replace the geomembrane for anti-seepage. Summary of the Utility Model

[0003] The embodiment of this application provides a reservoir structure with polyurea anti-seepage. This reservoir structure with polyurea anti-seepage avoids the high-requirement construction and welding of the geomembrane anti-seepage structure, has strong impact resistance, and strong resistance to external force damage.

[0004] The reservoir structure with polyurea anti-seepage provided by the embodiment of this application includes: a reservoir, which is formed by excavating or filling the soil body. The reservoir includes a reservoir bottom, a reservoir bank, and a top retaining wall. The surfaces of the reservoir bottom and the reservoir bank are soil foundation layers, and the top retaining wall is enclosed on the side of the reservoir bank away from the reservoir bottom;

[0005] A protective layer, which is arranged on the surface of the soil foundation layer. The protective layer is roller-compacted mortar, and a structural joint concave into the protective layer is arranged on the protective layer;

[0006] A polyurea anti-seepage layer, which is spray-coated on the surface of the protective layer.

[0007] The reservoir structure with polyurea anti-seepage provided by the embodiment of this application may also have the following additional technical features:

[0008] In an optional solution, the structural joint includes a plurality of first structural joints and a plurality of second structural joints. The first structural joints and the second structural joints are arranged vertically and horizontally in a criss-cross manner, and the joint at the intersection of the first structural joints and the second structural joints is a T-shaped joint.

[0009] In an optional solution, the width of the first structural joint and / or the second structural joint is not greater than 0.5 cm, and the spacing between adjacent two first structural joints and / or adjacent two second structural joints is 15 - 20 m.

[0010] In an alternative solution, the polyurea anti-seepage layer includes a base fabric and a polyurea layer that are sequentially laid on the protective layer. The number of layers of the base fabric laid is 1 to 3 layers, and the laying thickness of the polyurea layer is 3 to 5 mm.

[0011] In an alternative solution, the structural joint is filled with a polyurea layer. The number of layers of the base fabric laid on both sides of the structural joint within a range of 30 cm on each side is 2 to 3 layers, and the laying thickness of the polyurea layer is 5 mm. The number of layers of the base fabric laid at the remaining positions of the protective layer is 1 to 2 layers, and the laying thickness of the polyurea layer is 3 mm.

[0012] In an alternative solution, the top retaining wall is a concrete retaining wall, and a road surface is laid on the side of the top retaining wall facing away from the reservoir bank;

[0013] The slope ratio of the reservoir bank at the slope part is not steeper than 1:1.3, and the reservoir bottom at the part where the slope ratio is steeper than 1:6 is rolled by a slope rolling process.

[0014] The beneficial effects of the embodiments of the present application are as follows:

[0015] The polyurea anti-seepage layer of this reservoir structure has the same deformation ability as the geomembrane, can adapt to the deformation of the soil foundation and the filled structure after water storage, and avoids the construction and welding of the support layer under the high requirements of the geomembrane anti-seepage structure, making the construction more convenient. In addition, compared with the geomembrane, the polyurea anti-seepage layer has stronger impact resistance and stronger ability to resist external force damage during operation, and is not easily damaged compared with the geomembrane; polyurea has strong adhesiveness, and during later repair, the damaged part can be simply treated and then directly sprayed, and the maintenance is also more convenient.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic plan view of the reservoir structure provided by the present application;

[0018] Figure 2 is a schematic plan view of the structural joint provided by the present application;

[0019] Figure 3 is Figure 1 the schematic cross-sectional view of the reservoir structure in

[0020] Reference numerals: reservoir 1, reservoir bottom 11, reservoir bank 12, top retaining wall 13, soil foundation layer 2, protective layer 3, structural joint 31, first structural joint 32, second structural joint 33, polyurea anti-seepage layer 4, road surface 5.

[0021] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Detailed Description of the Embodiments

[0022] For a better understanding of the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0023] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0024] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0025] It should be understood that the term "and / or" used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0026] It should be noted that the orientation terms such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described from the angles shown in the accompanying drawings, and should not be construed as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0027] As Figures 1-3 shown, the embodiments of the present application provide a reservoir structure with polyurea anti-seepage. The reservoir structure with polyurea anti-seepage mainly includes a reservoir 1, a protective layer 3, and a polyurea anti-seepage layer 4. Among them, the reservoir 1 is formed by excavating or filling the soil body. The reservoir 1 includes a reservoir bottom 11, a reservoir bank 12, and a top retaining wall 13. The surfaces of the reservoir bottom 11 and the reservoir bank 12 are soil foundation layers 2. The top retaining wall 13 is enclosed on the side of the reservoir bank 12 away from the reservoir bottom 11; the protective layer 3 is arranged on the surface of the soil foundation layer 2. The protective layer 3 is roller-compacted mortar, and the laying thickness of the roller-compacted mortar is about 10 cm. A structural joint 31 recessed into the protective layer 3 is arranged on the protective layer 3; the polyurea anti-seepage layer 4 is spray-coated on the surface of the protective layer 3.

[0028] The polyurea anti-seepage layer 4 of the reservoir structure has the same deformation ability as the geomembrane, can adapt to the deformation of the soil foundation and the filling structure after impounding, and avoids the construction and welding of the support layer under the high requirements of the geomembrane anti-seepage structure, making the construction more convenient. In addition, compared with the geomembrane, the polyurea anti-seepage layer 4 has superior anti-seepage, ductility and adhesion, and can be constructed by brushing or spraying. The work efficiency is high and there is no welded joint. Therefore, using the polyurea anti-seepage layer 4 for anti-seepage not only has the advantages of fast and convenient, but also has strong deformation adaptability, and the polyurea can be directly used for brushing and repairing in the later stage.

[0029] As Figure 2 shown, in a specific embodiment, the structural joint 31 includes a plurality of first structural joints 32 and a plurality of second structural joints 33. The first structural joints 32 and the second structural joints 33 are arranged vertically and horizontally, and the joint at the intersection of the first structural joints 32 and the second structural joints 33 is in a T shape, avoiding the appearance of a "cross" joint. Specifically, the joint width of the first structural joint 32 and / or the second structural joint 33 is not greater than 0.5 cm, and the joint spacing between two adjacent first structural joints 32 and / or two adjacent second structural joints 33 is 15 - 20 m.

[0030] As Figures 1-3 shown, in a specific embodiment, the polyurea anti-seepage layer 4 includes a geotextile cloth and a polyurea layer laid on the protective layer 3 in sequence. The number of layers of the geotextile cloth laid is 1 - 3 layers, and the laying thickness of the polyurea layer is 3 - 5 mm. Specifically, the structural joint 31 is filled with the polyurea layer. The number of layers of the geotextile cloth laid on both sides of the structural joint 31 within 30 cm of the protective layer 3 is 2 - 3 layers, and the laying thickness of the polyurea layer is 5 mm. The number of layers of the geotextile cloth laid at the remaining positions of the protective layer 3 is 1 - 2 layers, and the laying thickness of the polyurea layer is 3 mm.

[0031] As Figures 1-3 shown, in a specific embodiment, the top retaining wall 13 is a concrete retaining wall, and a road surface 5 is laid on the side of the top retaining wall 13 facing away from the reservoir bank 12; the slope ratio of the reservoir bank 12 at the slope part is not steeper than 1:1.3, and the bottom of the reservoir 11 at the part where the slope ratio is steeper than 1:6 is rolled by the slope rolling process.

[0032] The construction of the reservoir structure with polyurea anti-seepage in the embodiment of the present application can be carried out according to the following steps:

[0033] 1) Excavate or fill to form the pool body structure of the reservoir 1 according to the impounding requirements, and the four sides of the reservoir 1 adopt an arc transition.

[0034] 2) Level, trim, and roll the area around the reservoir 1; the slope ratio of the slope part after excavation and filling of the reservoir 1 shall not be steeper than 1:1.3. Trim its surface and use a roller to roll and level it. The purpose of trimming is to eliminate phenomena such as pits, steps, and concentrated large boulders on the surface, and the purpose of leveling is to make the surface dense and the foundation surface smooth. For the rolling mortar at the bottom of the pool, use a self-propelled roller for vibrating rolling, and use the slope rolling process for rolling at parts steeper than 1:6.

[0035] 3) Lay mortar and roll it to form the protective layer 3; in this process, first roll the bottom part of the pool, and then roll the surrounding slope part. Use a self-propelled roller for rolling the bottom part of the pool. First, roll statically once and then use a vibrating roller. Use the slope rolling process for the slope part, rolling statically when going down and vibrating when going up.

[0036] 4) Use a cutting machine to cut the structural joint 31, and control the joint width within 0.5 cm.

[0037] 5) Use a high-pressure water gun to clean the surface of the rolled mortar, and then use the brushing process to fill the structural joint 31 with polyurea.

[0038] 6) Use the spraying process to first spray on both sides of the structural joint 31 within a range of 30 cm on each side. When the joint is fully filled with polyurea and the spraying thickness on both sides reaches 1.5 mm, cover it with a layer of geotextile.

[0039] 7) Spray polyurea on the entire reservoir basin (including the already sprayed structural joint 31 part). After reaching 1.5 mm, cover the entire reservoir basin with a layer of geotextile, and then spray another 1.5 mm of polyurea. In addition, according to the anti-seepage grade, a layer of geotextile can be added to the entire reservoir basin and then another 1.5 mm of polyurea can be sprayed.

[0040] 8) Build a concrete retaining wall around the reservoir 1, and press and cover the polyurea anti-seepage layer 4 on the side of the retaining wall facing the reservoir.

[0041] The above is only the preferred embodiment of this application and is not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A reservoir structure with polyurea anti-seepage, characterized in that, include: A water reservoir, wherein the water reservoir is formed by excavation or filling of soil, and comprises a reservoir bottom, a reservoir bank and a top retaining wall, wherein the surfaces of the reservoir bottom and the reservoir bank are soil foundation layers, and the top retaining wall is arranged on a side of the reservoir bank away from the reservoir bottom; A protective layer, the protective layer is arranged on the surface of the soil foundation layer, the protective layer is a rolled mortar, and the protective layer is provided with a structural joint recessed in the protective layer; A polyurea anti-seepage layer is sprayed on the surface of the protective layer.

2. The reservoir structure with polyurea anti-seepage according to claim 1, characterized in that The structural seams include a plurality of first structural seams and a plurality of second structural seams, the first structural seams and the second structural seams are arranged in a crisscross pattern, and the seams at the intersection of the first structural seams and the second structural seams are T-shaped.

3. The reservoir structure with polyurea anti-seepage according to claim 2, characterized in that, The width of the first structural seam and / or the second structural seam is not greater than 0.5 cm, and the seam spacing between two adjacent first structural seams and / or two adjacent second structural seams is 15 to 20 m.

4. The reservoir structure with polyurea anti-seepage according to any one of claims 1-3, characterized in that, The polyurea anti-seepage layer comprises a tire base fabric and a polyurea layer which are sequentially laid on the protective layer. The number of layers of the tire base fabric is 1 to 3, and the thickness of the polyurea layer is 3 to 5 mm.

5. The reservoir structure with polyurea anti-seepage according to claim 4, characterized in that, The structural seams are filled with polyurea layers, the protective layer is laid in 2 to 3 layers of the tire base cloth within 30 cm on both sides of the structural seams, and the thickness of the laid polyurea layer is 5 mm, and the protective layer is laid in 1 to 2 layers of the tire base cloth at other locations, and the thickness of the laid polyurea layer is 3 mm.

6. The reservoir structure with polyurea anti-seepage according to any one of claims 1-3 or claim 5, characterized in that, The top retaining wall is a concrete retaining wall, and a road surface is paved on one side of the top retaining wall away from the reservoir bank; The slope ratio of the reservoir bank at the sloped part is not steeper than 1:1.3, and the reservoir bottom is compacted by a slope compaction process at the part where the slope ratio is steeper than 1:6.

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