Polyurea anti-seepage membrane rockfill dam structure
By setting a geotextile isolation layer between the polyurea geotextile layer and the protective layer, the bonding problem between the polyurea geotextile layer and the surface protective layer of the rockfill dam is solved, which enhances the deformation adaptability and seepage prevention performance of the geotextile membrane rockfill dam, simplifies construction and improves operational safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-04-07
AI Technical Summary
The excellent adhesion between polyurea and the protective layer on the rockfill surface leads to deformation of the dam during operation, causing cracks in the protective layer and reducing the deformation adaptability of the polyurea impermeable layer.
Geotextile is used as an isolation layer and laid between the polyurea impermeable layer and the protective layer to eliminate strong adhesion. The excellent impermeability and deformation properties of the polyurea impermeable layer are utilized, and the structural adaptability is enhanced by setting deformation bulges.
It improves the deformation adaptability and seepage prevention performance of polyurea geomembrane rockfill dams, simplifies the construction process, reduces labor costs, and improves operational safety and material adaptability.
Smart Images
Figure CN224092416U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of rock-fill dam engineering, in particular to a polyurea anti-seepage membrane rock-fill dam structure. BACKGROUND
[0002] Polyurea has excellent anti-seepage, impact resistance and ductility, and is convenient to construct, but it has not been used for rock-fill dam surface anti-seepage in engineering practice. The main problem is that polyurea has superior bonding performance with the protective layer on the rock-fill surface, and the deformation of the dam during operation causes the protective layer to crack, and the effective bonding between polyurea and the protective layer will greatly reduce the deformation adaptability of the polyurea anti-seepage layer. CONTENT OF THE UTILITY MODEL
[0003] The present application provides a polyurea anti-seepage membrane rock-fill dam structure which can effectively overcome the problem of polyurea application for rock-fill dam surface anti-seepage.
[0004] The polyurea anti-seepage membrane rock-fill dam structure provided by the present application comprises a rock-fill dam body, wherein the rock-fill dam body has an upstream water retaining dam surface and a downstream dam surface, the bottom of the upstream water retaining dam surface is provided with a toe plate, and one side of the top of the upstream water retaining dam surface is provided with a wave wall.
[0005] A cushion layer is arranged on the upstream water retaining dam surface, and the cushion layer comprises a transition material area, a cushion material area and a protective layer which are sequentially arranged on the upstream water retaining dam surface, and the protective layer comprises one of rolled mortar, extruded side wall or inverted formwork slope.
[0006] A polyurea anti-seepage structure is arranged on the surface of the protective layer, one side of the polyurea anti-seepage structure is connected with the toe plate, and the other side of the polyurea anti-seepage structure is connected with the wave wall, the polyurea anti-seepage structure comprises a polyurea anti-seepage layer and a geotextile, and the geotextile is arranged as a separation layer between the protective layer and the polyurea anti-seepage layer.
[0007] In addition, the polyurea anti-seepage membrane rock-fill dam structure provided by the present application can further have the following additional technical features:
[0008] In an optional scheme, a first deformation bump is arranged at the joint part of the polyurea anti-seepage structure and the toe plate, a second deformation bump is arranged at the joint part of the polyurea anti-seepage structure and the wave wall, and a plurality of third deformation bumps are arranged at intervals on the polyurea anti-seepage structure, the third deformation bumps extend in the upstream and downstream directions and connect the first deformation bump and the second deformation bump.
[0009] In an alternative, the first deformed bump comprises an asphalt sand cushion layer and a polyurea thickening layer, the asphalt sand cushion layer at the first deformed bump is convex to the polyurea impervious structure and forms a circular arc surface, and the polyurea thickening layer is laid on the surface of the asphalt sand cushion layer.
[0010] In an alternative, the second deformed bump comprises an asphalt sand cushion layer and a polyurea thickening layer, and the polyurea thickening layer is laid on the surface of the asphalt sand cushion layer.
[0011] In an alternative, the third deformed bump comprises a polyurea thickening layer, the polyurea thickening layer comprises a geotextile and a polyurea impervious layer, the geotextile laid at the polyurea thickening layer has a thickness greater than that of the geotextile laid at the polyurea impervious structure, and the thickness difference of the geotextile between the two is not less than 5 cm.
[0012] In an alternative, the polyurea thickening layer comprises a polyurea impervious layer, the polyurea impervious layer laid at the polyurea thickening layer has a thickness greater than that of the polyurea impervious layer laid at the polyurea impervious structure, and the thickness difference of the polyurea impervious layer between the two is 1-2 mm; in the polyurea thickening layer, the thickening range of the polyurea impervious layer is greater than that of the geotextile, and the range difference between the two is not less than 20 cm.
[0013] In an alternative, the rockfill dam body comprises a rockfill drainage layer area and a secondary rockfill area, the rockfill drainage layer area and the secondary rockfill area are laid and arranged along the upstream and downstream directions, and the cross section of the rockfill dam body is trapezoidal.
[0014] In an alternative, the connection mode of the polyurea impervious structure with the toe slab and the wave protection wall is adhesive connection; the bottom foundation of the toe slab is subjected to impervious treatment, the impervious treatment comprises consolidation grouting and curtain grouting, or the bottom foundation is a soil foundation, and the impervious treatment adopts an impervious wall for impervious treatment.
[0015] The application has the following beneficial effects:
[0016] The polyurea impervious membrane rockfill dam structure in the application utilizes the isolation effect of the geotextile, eliminates the strong adhesion between the polyurea impervious layer and the lower protective layer, fully plays the excellent impervious performance and deformation performance of the polyurea impervious layer, solves the problem of polyurea application and surface imperviousness of the face rockfill dam, and has better deformation adaptability of the impervious structure to the dam and wider adaptability of the dam body filling material compared with the reinforced concrete face rockfill dam and the asphalt concrete face rockfill dam.
[0017] It should be understood that the foregoing general description and the following detailed description are only exemplary and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 A schematic diagram of a planar arrangement of the polyurea impervious face membrane rockfill dam structure provided in the present application is shown in Figure 1.
[0019] Figure 2 A schematic diagram of a planar arrangement of the polyurea impervious face membrane rockfill dam structure provided in the present application is shown in Figure 1. Figure 1 A schematic diagram of a cross-sectional view of the polyurea impervious face membrane rockfill dam structure provided in the present application is shown in Figure 2.
[0020] Figure 3 A schematic diagram of the connection of the polyurea impervious structure with the toe slab at the joint portion provided in the present application is shown in Figure 3.
[0021] Figure 4 A schematic diagram of the connection of the polyurea impervious structure with the wave protection wall at the joint portion provided in the present application is shown in Figure 4.
[0022] Figure 5 A schematic diagram of the connection of the polyurea impervious structure at the third deformed bulge position provided in the present application is shown in Figure 5.
[0023] Figure 1: Rockfill dam body 1, toe slab 2, wave protection wall 3, transition material area 4, cushion material area 5, protective layer 6, polyurea impervious structure 7, polyurea impervious layer 8, geotextile 9, first deformed bulge 10, second deformed bulge 11, third deformed bulge 12, asphalt sand cushion 13, polyurea thickened layer 14, rockfill drainage layer area 15, secondary rockfill area 16, bottom foundation 17.
[0024] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the present application. DETAILED DESCRIPTION
[0025] For better understanding of the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0026] It should be clear that the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other technical solutions obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.
[0027] The terms used in the embodiments of the present application are merely for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" 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.
[0028] It should be understood that the term "and / or" used herein is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.
[0029] It should be noted that the terms "upper", "lower", "left", "right" and the like described in the embodiments of the present application are described from the angle shown in the drawings, and should not be understood as a limitation of the embodiments of the present application. In addition, in the context, it should also be understood that when referring to an element connected to another element "on" or "under", it can be directly connected to another element "on" or "under" or indirectly connected to another element "on" or "under" through an intermediate element.
[0030] As shown in Figures 1-5 The polyurea anti-seepage face membrane rockfill dam structure provided by the embodiments of the present application mainly comprises a rockfill dam body 1, a cushion layer and a polyurea anti-seepage structure 7, wherein the rockfill dam body 1 has an upstream water retaining dam surface and a downstream dam surface, the bottom of the upstream water retaining dam surface is provided with a toe plate 2, and one side of the top of the upstream water retaining dam surface is provided with a wave protection wall 3; the cushion layer comprises a transition material area 4, a cushion material area 5 and a protection layer 6 which are sequentially laid on the upstream water retaining dam surface, the protection layer 6 comprises structures such as rolled mortar, extruded side wall or inverted formwork slope fixing, etc.; the polyurea anti-seepage structure 7 is laid on the surface of the protection layer 6, and one side of the polyurea anti-seepage structure 7 is directly or indirectly connected with the toe plate 2, and the other side is directly or indirectly connected with the wave protection wall 3, the polyurea anti-seepage structure 7 comprises a polyurea anti-seepage layer 8 and a geotextile 9, the geotextile 9 is laid as a separation layer between the protection layer 6 and the polyurea anti-seepage layer 8, and the separation between the polyurea anti-seepage layer 8 and the protection layer 6 can be effectively realized through the geotextile 9, and the polyurea is prevented from being bonded on the protection layer 6, and the polyurea anti-seepage layer 8 can relatively freely stretch and contract when the protection layer 6 has cracks.
[0031] The polyurea anti-seepage face membrane rockfill dam structure in the embodiments utilizes the isolation effect of the geotextile 9, eliminates the strong bonding between the polyurea anti-seepage layer 8 and the lower protection layer 6, fully utilizes the excellent anti-seepage performance and deformation performance of the polyurea anti-seepage layer 8, solves the problem of polyurea application and surface anti-seepage of the face rockfill dam, and has better deformation adaptability of the anti-seepage structure to the dam and wider adaptability of the dam body filling material compared with the reinforced concrete face rockfill dam and the asphalt concrete face rockfill dam.
[0032] In addition, the polyurea impervious layer 8 has good impact resistance, and thus can effectively resist damage from external forces during operation, ensuring safe operation. Compared with a geomembrane-faced rockfill dam that has excellent deformation adaptability, the surface protection structure can be simplified. The polyurea impervious layer 8 has excellent workability, low labor cost, fast construction speed, and convenient post-operation repair. Whether it is a local pit or a large-scale damage, the polyurea impervious layer 8 can be directly sprayed or brushed after simple surface treatment, and the dam can be impounded or put into normal operation on the same day of completion of construction.
[0033] As shown in Figure 1 In a specific embodiment, the polyurea impervious structure 7 is provided with a first deformation bump 10 at a joint position of the toe slab 2, the polyurea impervious structure 7 is provided with a second deformation bump 11 at a joint position of the wave wall 3, and a plurality of third deformation bumps 12 are provided on the polyurea impervious structure 7 at intervals. The interval between two adjacent third deformation bumps 12 can be 10-20 m. The third deformation bumps 12 extend in the upstream and downstream directions and connect the first deformation bump 10 and the second deformation bump 11.
[0034] As shown in Figures 3-5 In a specific embodiment, the third deformation bump 12 includes a polyurea thickening layer 14. The polyurea thickening layer 14 includes the geotextile 9 and the polyurea impervious layer 8. The thickness of the geotextile 9 laid at the polyurea thickening layer 14 is greater than the thickness of the geotextile 9 laid at the polyurea impervious structure 7, and the thickness difference of the geotextile 9 between them is not less than 5 cm. The thickness of the polyurea impervious layer 8 laid at the polyurea thickening layer 14 is greater than the thickness of the polyurea impervious layer 8 laid at the polyurea impervious structure 7, and the thickness difference of the polyurea impervious layer 8 between them is 1-2 mm. In the polyurea thickening layer 14, the thickening range of the polyurea impervious layer 8 is greater than the thickening range of the geotextile 9, and the range difference between them is not less than 20 cm.
[0035] As shown in Figure 3 In a specific embodiment, the first deformation bump 10 includes an asphalt sand cushion layer 13 and a polyurea thickening layer 14. The asphalt sand cushion layer 13 at the first deformation bump 10 protrudes outward from the polyurea impervious structure 7 and forms a circular arc surface, and the polyurea thickening layer 14 is laid on the surface of the asphalt sand cushion layer 13. Specifically, during construction, the protective layer 6 and the cushion layer at the joint pre-position of the toe slab 2 can be excavated first, the asphalt sand cushion layer 13 is used to fill and form the outward protruding first deformation bump 10, the geotextile 9 is added on both sides of the first deformation bump 10 to increase the size of the bump. The structure sharp corners of the polyurea impervious layer 8 covered on the inner side of the toe slab 2 are set as circular arc shapes, and the added range of the geotextile 9 on the asphalt sand cushion layer 13 is 10 cm on both sides of the asphalt sand cushion layer 13, and the thickness is not less than 5 cm.
[0036] As shown in Figure 2 and Figure 4As shown, in one specific embodiment, the wave-breaking wall 3 is set on the cushion material area 5 to avoid the risk of cracking at the top of the protective layer 6 due to the inconsistent deformation performance between the protective layer 6 and the cushion material area 5. The second deformable bulge 11 includes an asphalt sand cushion layer 13 and a polyurea thickening layer 14, with the polyurea thickening layer 14 laid on the surface of the asphalt sand cushion layer 13. Specifically, after the protective layer 6 and the wave-breaking wall 3 are filled and smoothed by the asphalt sand cushion layer 13, geotextile 9 is laid to form an outwardly convex bulge. The structural sharp corners of the part covered by the polyurea impermeable layer 8 on the outside of the wave-breaking wall 3 are set as arcs. In the second deformable bulge 11 preset in the horizontal joint of the wave-breaking wall 3, the geotextile 9 extends 10cm beyond the asphalt sand cushion layer 13 and has a thickness of not less than 5cm.
[0037] like Figures 1-2 As shown, in one specific embodiment, the rockfill dam 1 includes a rockfill drainage layer 15 and a secondary rockfill layer 16, which are laid out along the upstream and downstream directions. The cross-section of the rockfill dam 1 is trapezoidal. Furthermore, the polyurea anti-seepage structure 7 is connected to the toe slab 2 and the wave wall 3 by adhesive bonding. The bottom foundation 17 of the toe slab 2 undergoes anti-seepage treatment, which includes consolidation grouting and curtain grouting. When the bottom foundation 17 is a soil foundation, anti-seepage treatment is performed using an anti-seepage wall.
[0038] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A polyurea impermeable membrane rockfill dam structure, characterized in that, include: A rockfill dam body, the rockfill dam body having an upstream water-retaining dam face and a downstream dam face, the bottom of the upstream water-retaining dam face being provided with a toe plate, and a wave-breaking wall being provided on one side of the top of the upstream water-retaining dam face; The cushion material layer includes a transition material area, a cushion material area and a protective layer sequentially laid on the upstream dam surface. The protective layer includes one of compacted mortar, extruded sidewall or formwork slope stabilization. A polyurea seepage-proof structure is laid on the surface of the protective layer, with one side of the polyurea seepage-proof structure connected to the toe plate and the other side connected to the wave wall. The polyurea seepage-proof structure includes a polyurea seepage-proof layer and a geotextile, with the geotextile laid as an isolation layer between the protective layer and the polyurea seepage-proof layer.
2. The polyurea impermeable membrane rockfill dam structure according to claim 1, characterized in that, The polyurea waterproofing structure is provided with a first deformable bulge at the joint with the toe plate, the polyurea waterproofing structure is provided with a second deformable bulge at the joint with the wave wall, and a plurality of third deformable bulges are provided at intervals on the polyurea waterproofing structure. The third deformable bulges extend in the upstream and downstream direction and connect the first deformable bulges and the second deformable bulges.
3. The polyurea impermeable membrane rockfill dam structure according to claim 2, characterized in that, The first deformed bulge includes an asphalt sand cushion layer and a polyurea thickening layer. The asphalt sand cushion layer at the first deformed bulge protrudes outward from the polyurea anti-seepage structure and forms an arc surface. The polyurea thickening layer is laid on the surface of the asphalt sand cushion layer.
4. The polyurea impermeable membrane rockfill dam structure according to claim 2, characterized in that, The wave-breaking wall is set on the cushion material area, and the second deformed bulge includes an asphalt sand cushion layer and a polyurea thickened layer, with the polyurea thickened layer laid on the surface of the asphalt sand cushion layer.
5. The polyurea impermeable membrane rockfill dam structure according to claim 3 or 4, characterized in that, The third deformed bulge includes a polyurea thickened layer; the polyurea thickened layer includes geotextile and a polyurea impermeable layer, the thickness of the geotextile laid at the polyurea thickened layer is greater than the thickness of the geotextile laid at the polyurea impermeable structure, and the thickness difference of the geotextile between the two is not less than 5 cm.
6. The polyurea impermeable membrane rockfill dam structure according to claim 5, characterized in that, The thickness of the polyurea impermeable layer laid at the polyurea thickened layer is greater than the thickness of the polyurea impermeable layer laid at the polyurea impermeable structure, and the thickness difference between the two polyurea impermeable layers is 1 to 2 mm; in the polyurea thickened layer, the thickened range of the polyurea impermeable layer is greater than the thickened range of the geotextile, and the difference between the two ranges is not less than 20 cm.
7. The polyurea geomembrane rockfill dam structure according to any one of claims 1-4 or 6, characterized in that, The rockfill dam body includes a rockfill drainage layer and a secondary rockfill layer, which are laid out along the upstream and downstream directions. The cross-section of the rockfill dam body is trapezoidal.
8. The polyurea impermeable membrane rockfill dam structure according to claim 7, characterized in that, The polyurea impermeable structure is connected to the toe slab and the wave wall by adhesive bonding; the bottom foundation of the toe slab is subjected to impermeable treatment, which includes consolidation grouting and curtain grouting, or the bottom foundation is a soil foundation, and the impermeable treatment is carried out by an impermeable wall.