A concrete face rockfill dam

Abstract

A steel-faced rockfill dam. The present invention includes a dam body and a dam slope impervious body. The surface layer of the dam body is bedding material. The dam slope impervious body includes a steel panel and a coiled plate. The steel panel and the coiled plate are arranged successively from top to bottom along the dam body, and the lower end of the steel panel is fixedly connected to the coiled plate. A combined structure is arranged on the dam foundation at the lower end of the coiled plate, and the lower end of the coiled plate is fixedly connected to the steel side plate of the combined structure. The beneficial effects are as follows: The structural design is reasonable. The steel panel is used as the dam slope impervious body, and has good impervious performance; the steel panel has good deformation adaptability, high failure limit, and tensile performance far higher than that of a concrete panel, and basically no cracks will occur; a combined structure is arranged at the contact between the steel panel and the bank slope or the riverbed, effectively preventing the damage of the dam accessory structure caused by the deformation of the steel panel and the void between the steel panel and the dam body bedding layer, and ensuring the impervious performance of the dam.

Description

Technical Field

[0001] The present invention relates to a rockfill dam, and more particularly to a steel-faced rockfill dam, belonging to the technical field of dam construction. Background Art

[0002] A reinforced concrete faced rockfill dam, abbreviated as a concrete faced dam, is one of the main types of earth-rock dams. It has many advantages such as good dam slope stability, good water pressure bearing performance, good seismic performance, strong adaptability to geology, terrain and climate, and good economy, and is widely used. However, due to reasons such as uneven settlement of the dam body and changes in environmental temperature, the reinforced concrete face slab, which is the anti-seepage body of the dam slope, is prone to cracking, which is also a problem that the dam engineering field has not been able to completely solve. The invention patent with the application number CN201811560742.4 discloses a steel plate-concrete composite face slab earth-rock dam, that is, a channel steel face slab and a concrete face slab are sequentially laid from the inside to the outside on the upstream face of the dam body. The channel steel face slab includes a number of channel steels arranged at intervals along the dam height direction. The upstream face of the channel steel face slab is cast with concrete in blocks to form a concrete face slab, and the concrete face slab wraps the channel steel face slab. This channel steel face slab and concrete face slab earth-rock dam cannot effectively solve the problem of face slab cracking. Summary of the Invention

[0003] In order to overcome the problem of face slab cracking existing in the existing channel steel face slab and concrete face slab earth-rock dams, the present invention provides a steel-faced rockfill dam.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a steel-faced rockfill dam, including a dam body and a dam slope anti-seepage body. The surface layer of the dam body is cushion material. The dam slope anti-seepage body includes a steel face slab and a coiled plate. The steel face slab and the coiled plate are sequentially arranged from top to bottom along the dam body, and the lower end of the steel face slab is fixedly connected to the coiled plate.

[0005] A combined structure is arranged on the dam foundation at the lower end of the coiled plate, and the lower end of the coiled plate is fixedly connected to the steel side plate of the combined structure.

[0006] The concrete bottom plate, steel side plate and steel pressing plate of the combined structure are fixedly arranged in sequence from bottom to top.

[0007] A concrete side plate is arranged between the concrete bottom plate and the steel pressing plate and on the upstream side of the steel side plate, and the concrete side plate is fixedly connected to the steel pressing plate.

[0008] A flexible water-stop material is arranged between the steel side plate and the concrete bottom plate, steel pressing plate and concrete side plate.

[0009] Further, the water-stop material is rubber or SR flexible filler.

[0010] The concrete bottom plate, steel side plate and steel pressing plate are fixedly connected by screw I; the concrete side plate and the steel side plate are fixedly connected by screw II.

[0011] The diameter of the screw hole Ⅰ of the steel edge plate is 4 to 6 times the diameter of the screw Ⅰ.

[0012] The joints between the steel panel, the coiled plate, and the steel edge plate are fixedly connected by welding.

[0013] The beneficial effects of the present invention are as follows: The structure is reasonably designed. The steel panel is used as the anti-seepage body of the dam slope, and has good anti-seepage performance; the steel panel has good adaptability to deformation, a high failure limit, and its tensile performance is much higher than that of the concrete panel, and basically no cracks will occur; a combined structure is provided at the contact between the steel panel and the bank slope or the riverbed, which effectively prevents the damage of the auxiliary structure of the dam caused by the deformation of the steel panel and the void between the steel panel and the dam body cushion layer, ensuring the anti-seepage performance of the dam. Description of the Drawings

[0014] Figure 1 It is a schematic cross-sectional view of the steel panel rockfill dam (cross-section) of the present invention.

[0015] Figure 2 is Figure 1 the top view of

[0016] In the figure: 1. Steel panel, 2. Coiled plate, 3. Steel edge plate, 4. Steel pressing plate, 5. Concrete bottom plate, 6. Concrete side plate, 7. Screw Ⅰ, 8. Screw Ⅱ, 9. Waterproof material, 10. Dam body, 11. Dam foundation, 12. Combined structure, 13. Screw hole Ⅰ, 14. Screw hole Ⅱ, 15. Cushion material. Detailed Embodiments

[0017] The present invention will be further described below in conjunction with the drawings and embodiments. However, those skilled in the art should be aware that the present invention is not limited to the specific embodiments listed, and as long as it conforms to the spirit of the present invention, it should be included within the protection scope of the present invention.

[0018] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "left", "right", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing or simplifying the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0019] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected", "sealed" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, a direct connection, an indirect connection, or an integral connection; it can be a mechanical connection, an indirect connection through an intermediate medium, or a communication inside two components. The seal can be an oil seal, a packing seal or other forms of seals. For those of ordinary skill in the art, the above can be understood according to specific circumstances

[0020] See the appendix Figure 1 、 2 A steel-faced rockfill dam of the present invention includes a dam body 10, a steel faceplate 1, a rolled plate 2, and a combined structure 12. The surface layer of the dam body 10 is a bedding material 15; preferably, the thickness of the bedding material is 1.20 - 1.25 m.

[0021] The slope anti-seepage body of the dam includes a steel faceplate 1 and a rolled plate 2. The steel faceplate 1 and the rolled plate 2 are arranged in sequence from top to bottom along the dam body 10, and the lower end of the steel faceplate 1 is fixedly connected to the rolled plate 2.

[0022] A combined structure 12 is arranged on the dam foundation 11 at the lower end of the rolled plate 2. The lower end of the rolled plate 2 is fixedly connected to the steel side plate 3 of the combined structure 12 to prevent the panel at the toe of the slope from being damaged due to stress concentration. The combined structure 12 is arranged on the dam foundation 11 to prevent the anti-seepage body composed of the steel faceplate 1 from being separated from the bedding material due to expansion and contraction deformation.

[0023] Furthermore, the joints between the steel faceplate 1, the rolled plate 2, and the steel side plate 3 are all fixedly connected by welding. Preferably, the joints are fully welded without gaps. The steel faceplate 1 is made of stainless steel, with a length of 2 - 6 m, a width of 1 - 2 m, and a thickness not exceeding 1 cm; the rolled plate 2 has the same thickness as the steel faceplate 1, and the radius of curvature and width of the rolled plate 2 are determined by calculation.

[0024] The concrete bottom plate 5, the steel side plate 3, and the steel pressing plate 4 of the combined structure 12 are fixedly arranged in sequence from bottom to top. The lower parts of the concrete bottom plate 5 and the concrete side plate 6 are both the dam foundation 11; between the concrete bottom plate 5 and the steel pressing plate 4, on the upstream side of the steel side plate 3 (such as Figure 1 the left side of the steel side plate 3 shown), a concrete side plate 6 is arranged, and the concrete side plate 6 is fixedly connected to the steel side plate 4. Preferably, steel plates are embedded in both the concrete bottom plate 5 and the concrete side plate 6.

[0025] Preferably, the thickness and material of the steel side plate 3 and the steel pressing plate 4 are the same as those of the steel faceplate 1.

[0026] Preferably, the concrete bottom plate 5 and the concrete side plate 6 can be a stepped bottom plate formed by integral pouring, and steel plates are arranged in the stepped bottom plate.

[0027] A combined structure 12 is arranged at the contact between the upstream toe of the steel face rockfill dam and the bank slope to prevent damage caused by the overall deformation of the steel face or the separation from the dam body.

[0028] A flexible water-stop material 9 is arranged between the steel side plate 3 and the concrete bottom plate 5, the steel pressing plate 4, and the concrete side plate 6; preferably, the water-stop material 9 is rubber or SR flexible filler to ensure good anti-seepage performance of the dam slope anti-seepage body.

[0029] The concrete bottom plate 5, the steel side plate 3, and the steel pressing plate 4 are fixedly connected by bolts Ⅰ7; the concrete side plate 6 and the steel side plate 4 are fixedly connected by bolts Ⅱ8.

[0030] Furthermore, the diameter of the bolt Ⅰ hole 13 of the steel side plate 3 is 4 - 6 times the diameter of the bolt Ⅰ7 to ensure the stability of the bolt Ⅰ7 and that the combined structure 12 will not be deformed or damaged after the steel face welded as a whole is deformed.

[0031] In the application of the present invention, the concrete bottom plate 5 and the concrete side plate 6 of the combined structure 12 are both arranged on the dam foundation 11, specifically as follows:

[0032] The connection method between the steel side plate 3 and the concrete bottom plate 5 with an internally embedded steel plate is that the concrete bottom plate 5 is a casting. Before casting, the embedded steel plate is connected by a threaded hole and the bolt Ⅰ7, and after casting, the concrete bottom plate 5 is fixedly connected with the bolt Ⅰ7; the bolt Ⅰ7 passes through the bolt Ⅰ hole 13 of the steel side plate 3, and the steel side plate 3 presses on the concrete bottom plate 5; the bolt Ⅰ7 passes through the bolt Ⅰ hole 13 of the steel pressing plate 4, and the steel pressing plate 4 presses on the steel side plate 3.

[0033] The concrete side plate 6 is a casting with an internally embedded steel plate. The concrete side plate 6 is located on the upstream side of the steel side plate 3, and the lower part of the concrete side plate 6 has partial overlap with the concrete bottom plate 5 (as Figure 1 shown); the steel pressing plate 4 is arranged on the concrete side plate 6. The specific connection method is that before casting the concrete side plate 6, the embedded steel plate is connected by a screw hole and the bolt Ⅱ8, and after casting, the concrete side plate 6 is fixedly connected with the bolt Ⅱ8. The bolt Ⅱ8 passes through the bolt Ⅱ hole 14 of the steel pressing plate 4, and the steel pressing plate 4 presses on the concrete side plate 6.

[0034] The gap between the steel side plate 3 and the steel pressing plate 4, the concrete side plate 6, and the concrete bottom plate 5 is filled with a flexible water-stop material 9, and the water-stop material 9 is selected as rubber or SR flexible filler.

[0035] Nuts are installed at the upper ends of the bolts Ⅰ7 and bolts Ⅱ8 to fix the steel pressing plate 4.

[0036] After the steel faceplate 1, the coiled plate 2, and the steel side plate 3 are welded, in order to ensure the stability of the screw I 7 and the screw II 8 when the steel faceplate deforms and the structure of the combined structure is not damaged. Preferably, the diameter of the screw I hole 13 in the steel side plate 3 is much larger than the diameter of the screw I 7 (as Figure 2 shown). For example, when the diameter of the screw I 7 is 10 cm, the diameter of the screw I hole 13 is at least 40 - 60 cm.

[0037] At the contact with the hillside outside the upstream toe of the steel faceplate rockfill dam, the combined structure 12 can also be used to prevent the damage caused by the overall deformation of the steel faceplate or the separation from the dam body. The connection method between the combined structure 12 and the dam body is that the steel side plate 3 and the coiled plate 2 are connected by welding without leaving gaps; a peripheral joint is set between the concrete side plate 6, the concrete bottom plate 5 and the dam body and a water stop is provided. The width of the peripheral joint and the form of the water stop are determined according to relevant specifications and through calculation.

[0038] The combined structure is connected to the treated riverbed or bank slope by pouring the concrete side plate during construction.

[0039] Applying the steel faceplate rockfill dam of the present invention, the steel faceplate is used as the anti-seepage body of the dam slope. The anti-seepage ability is much stronger than that of the reinforced concrete faceplate, and the adaptability of the steel plate to deformation is high, and the failure limit is high. It will not crack easily like the concrete faceplate; at the contact between the periphery of the steel faceplate and the bank slope and the riverbed, the combined structure is adopted, which can effectively prevent the damage of the dam accessory structure caused by the deformation of the steel faceplate welded as a whole and the separation between the steel faceplate and the dam body cushion layer.

[0040] It should be noted that the above embodiments are examples and do not limit the present invention. Those skilled in the art will be able to design many alternative embodiments without departing from the scope of the claims of this patent.

Claims

1. A steel-faced rockfill dam, comprising a dam body and a dam slope anti-seepage body, wherein the surface layer of the dam body is a cushion material, and is characterized by: The dam slope anti-seepage body comprises a steel panel and a rolled plate, which are arranged in sequence from top to bottom along the dam body, and the lower end of the steel panel is fixedly connected to the rolled plate; A combined structure is arranged on the dam foundation at the lower end of the roll plate, and the lower end of the roll plate is fixedly connected to the steel side plate of the combined structure; The concrete bottom plate, steel side plate and steel pressure plate of the combined structure are fixedly arranged in sequence from bottom to top; A concrete side plate is arranged between the concrete bottom plate and the steel pressure plate and on the upstream side of the steel side plate, and the concrete side plate is fixedly connected to the steel pressure plate; The concrete bottom plate, steel side plate and steel pressure plate are fixedly connected by screw rods I; the concrete side plate and steel side plate are fixedly connected by screw rods II; The diameter of the screw rod I hole of the steel side plate is 4 to 6 times the diameter of the screw rod I.

2. The steel-faced rockfill dam according to claim 1 is characterized in that: Flexible water-stopping materials are arranged between the steel side plate and the concrete bottom plate, the steel pressure plate and the concrete side plate.

3. The steel-faced rockfill dam according to claim 2 is characterized in that: The water-stopping material is rubber or SR flexible filler.

4. The steel-faced rockfill dam according to claim 1 is characterized in that: The connections between the steel panel, the rolled plate and the steel side plate are fixedly connected by welding.

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