Fabricated concrete face rockfill dam anti-freezing structure

Abstract

The utility model provides a fabricated concrete face rock-fill dam anti-freezing structure which is characterized in that a water stop structure is arranged in a face plate vertical seam between two adjacent concrete face plates, and the anti-freezing structure is arranged between the lowest water level of a water level amplitude variation area and the highest water level of the water level amplitude variation area; comprising a plurality of ice crushing structures which are arranged in parallel in the gradient direction of a concrete panel, the ice crushing structures are detachably connected to the surface of the concrete panel, and the ice crushing structures are arranged between the lowest water level of a water level amplitude variation area and the highest water level of the water level amplitude variation area to form a near-dam ice crushing area so as to promote crushing of an ice layer in the near-dam area.

Description

TECHNICAL FIELD

[0001] The utility model relates to water conservancy and hydropower engineering technical field especially relates to a prefabricated concrete face rockfill dam anti-freezing structure. BACKGROUND

[0002] Due to the advantages of local material, investment saving, convenient construction, etc., in recent decades, the concrete face rockfill dam type has been widely used in water conservancy and hydropower engineering construction. Engineering practice shows that in the northern cold or cold regions, under the action of freezing in winter, the concrete face plate and vertical seam water stop structure are easy to be damaged locally, which further leads to the reduction of durability, and even causes the damage of the impervious body, affecting the long-term safe operation of the power station. The methods of improving the strength of the concrete face plate or using the improved face plate structure seam water stop surface structure to solve the problem of ice resistance of the face plate not only have limited effect, but also have high cost and high price. SUMMARY

[0003] The utility model discloses a prefabricated concrete face rockfill dam anti-freezing structure, which can solve the problem of local damage of the concrete face plate and vertical seam water stop structure in severe cold.

[0004] Therefore, the utility model adopts the following technical scheme:

[0005] A prefabricated concrete face rockfill dam anti-freezing structure is provided, which is arranged between the lowest water level of the water level amplitude area and the highest water level of the water level amplitude area and comprises a plurality of ice crushing structures arranged in parallel along the slope direction of the concrete face plate.

[0006] On the basis of the above technical scheme, the utility model can also adopt the following further technical scheme, or use these further technical schemes in combination:

[0007] A protective cover is arranged between the plurality of ice crushing structures on the adjacent two concrete face plates, the water stop structure is located in the protective cover, the protective cover is detachably connected to the surface of the concrete face plate, and the two ends of the protective cover are fixed by edge sealant.

[0008] One end of the ice crushing structure on the same horizontal line is adjacent to the protective cover.

[0009] The front side of the ice crushing structure faces the lowest water level of the water level amplitude area, the front side of the ice crushing structure is provided as an arc-shaped plate, the lower end of the arc-shaped plate is attached to the concrete face plate, and the upper end of the arc-shaped plate is tilted away from the concrete face plate.

[0010] The ice-crushing structure is a "factory" shaped structure. The upper side of the ice-crushing structure is a horizontally arranged flat plate, and an angle is formed between the flat plate and the arc-shaped plate. One end of the flat plate is attached to the concrete panel.

[0011] Several reinforcing ribs are fixed to the rear side of the arc-shaped plate.

[0012] The protective cover, the ice-crushing structure, and the reinforcing ribs are all made of stainless steel.

[0013] The lower end of the protective cover is located below the lowest water level in the water level fluctuation zone, and the upper end of the protective cover is located above the highest water level in the water level fluctuation zone.

[0014] The ice-breaking structure is fixed to the concrete panel using countersunk bolts.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects: by setting up a broken ice structure between the lowest water level and the highest water level in the water level fluctuation zone, a broken ice zone near the dam is formed, which promotes the breaking of ice layers in the near-dam area. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the planar structure of this utility model.

[0017] Figure 2 This utility model Figure 1 A cross-sectional schematic diagram of AA.

[0018] Figure 3 This utility model Figure 1 A cross-sectional view of BB.

[0019] Figure 4 This utility model Figure 2 Enlarged diagram of point C in the middle. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote elements with the same or similar functions throughout. However, it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting this utility model. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this utility model.

[0021] The utility model is further described below with reference to the drawings and examples, but is not taken as the basis for limiting the utility model.

[0022] The utility model discloses a kind of assembled concrete face rockfill dam anti-freezing structures, water stop structure 6 is equipped in panel vertical joint 5 between adjacent two concrete face panels 4, anti-freezing structure is arranged between lowest water level 10 of water level amplitude area and highest water level 11 of water level amplitude area, including the slope direction of concrete face panel 4 Parallelly arranged several ice crushing structures 2, ice crushing structure 2 is detachably connected on the surface of concrete face panel 4.

[0023] Between lowest water level 10 of water level amplitude area and highest water level 11 of water level amplitude area, generally several rows of ice crushing structures 2 (such as 3~5 rows) are arranged, and in the embodiment, 4 rows of ice crushing structures 2 are arranged along the slope direction of concrete face; if reservoir water level amplitude is larger, a row can be additionally provided according to about 2m height difference.

[0024] Ice layer in winter is met with stainless steel anti-freezing structure when water level changes, can promote the fragmentation of ice layer in near dam area, to form a "near dam ice crushing area" with width greater than 50cm.

[0025] Several ice crushing structures 2 on adjacent two concrete face panels 4 are equipped with protective cover 1, water stop structure 6 is located in protective cover 1, protective cover 1 is detachably connected on the surface of concrete face panel 4, and both ends of protective cover 1 are fixed using edge sealing agent.

[0026] Protective cover 1 has relatively obvious "sinking" effect, which greatly reduces the ice pull force and ice push force of ice layer at vertical joint.

[0027] Protective cover 1 and ice crushing structure 2 are independent structures, which can better adapt to the deformation of vertical joint.

[0028] In the embodiment, protective cover 1 is fixed on concrete face panel 4 by bolts, and the bolt spacing is 0.3~0.5m.

[0029] One end of ice crushing structure 2 on the same horizontal line is adjacent to protective cover 1, that is, the sum of the length of several ice crushing structures 2 on the same horizontal line and the width of several protective covers 1 is equal to the sum of the width of several concrete face panels 4, the width of protective cover 1 is 0.6m, and the length of ice crushing structure 2 between two protective covers 1 is equal to the width of concrete face panel 4 minus 0.6m, and the width of concrete face panel 4 is 9~12m.

[0030] The front side of ice crushing structure 2 faces lowest water level 10 of water level amplitude area, the front side of ice crushing structure 2 is provided as an arc-shaped plate, the lower end of the arc-shaped plate is attached to concrete face panel 4, and the upper end of the arc-shaped plate is tilted away from concrete face panel 4.

[0031] In the embodiment, the arc-shaped plate is a circular arc plate with a radius in the range of 0.7-1.1 m.

[0032] The ice crushing structure 2 is a "factory" shaped structure, and the upper side of the ice crushing structure 2 is a horizontally arranged flat plate, and the flat plate and the arc-shaped plate form an angle, and one end of the flat plate is attached to the concrete panel 4.

[0033] When the water level rises, the reverse arc segment steel plate of the anti-freezing structure makes it easier for the ice layer to climb up, and the angle of the reverse arc and the horizontal segment enhances the ice crushing effect.

[0034] In the embodiment, the length of the flat plate is 0.5-1 m.

[0035] The rear side of the arc-shaped plate is fixed with a plurality of reinforcing rib plates 3.

[0036] In the embodiment, the reinforcing rib plate 3 is perpendicular to the flat plate of the ice crushing structure 2 and is located below the flat plate, and the reinforcing rib plate 3 is welded to the ice crushing structure 2.

[0037] Four to six reinforcing rib plates 3 can be welded behind each ice crushing structure 2, and the distance between the adjacent two reinforcing rib plates 3 is about 2 m.

[0038] The protective cover 1, the ice crushing structure 2, and the reinforcing rib plate 3 are all made of stainless steel, which can prevent rust and improve durability.

[0039] In the embodiment, the thickness of the stainless steel plate used for the protective cover 1 is 0.5-1 mm; the thickness of the stainless steel plate used for the ice crushing structure 2 is 0.8-2 mm, which can be adjusted according to the degree of freezing; and the thickness of the stainless steel plate used for the reinforcing rib plate 3 is 0.8-2 mm.

[0040] The lower end of the protective cover 1 is located below the lowest water level 10 of the water level fluctuation area, and the upper end of the protective cover 1 is located above the highest water level 11 of the water level fluctuation area.

[0041] In the embodiment, the lower end of the protective cover 1 is located 0.5 m below the lowest water level 10 of the water level fluctuation area, and the upper end of the protective cover 1 is located 0.5 m above the highest water level 11 of the water level fluctuation area.

[0042] The ice crushing structure 2 is fixed on the concrete panel 4 by means of a countersunk bolt, and the distance between the adjacent two countersunk bolts is 0.3-0.5 m.

[0043] The countersunk bolt anchoring can reduce the ice surface lifting resistance, prevent the joint anchoring from being pulled out by ice, cause the anti-freezing structure to lose stability, and enhance the reliability of the anti-freezing structure.

[0044] A method for using the assembled concrete panel rock-fill dam anti-freezing structure, comprising the following steps:

[0045] I. The prefabricated protective cover 1 is designed according to the size of the water stop structure 6 and the height between the lowest water level 10 and the highest water level 11 of the water level fluctuation area, and the width of the protective cover 1 is greater than the width of the water stop structure 6, and the length of the protective cover 1 is greater than the length of the concrete panel (4) between the lowest water level 10 and the highest water level 11 of the water level fluctuation area;

[0046] II. The prefabricated ice crushing structure 2 is designed according to the transverse width of the protective cover 1 and the concrete panel 4, and the "factory" shaped ice crushing structure 2 is processed in advance, and a plurality of reinforcing rib plates 3 are welded on the rear side of the arc plate of the ice crushing structure 2;

[0047] III. According to the height between the lowest water level 10 and the highest water level 11 of the water level fluctuation area, a plurality of ice crushing structures 2 are arranged therebetween, the ice crushing structures 2 are arranged in parallel along the slope direction of the concrete panel 4, the spacing between the upper and lower ice crushing structures 2 is greater than or equal to 1.5 meters, and the ice crushing structures 2 are fixed on the concrete panel 4 by means of countersunk head bolts;

[0048] IV. The protective cover 1 is installed above the water stop structure 6, and the protective cover 1 is fixed on the concrete panel 4 by means of bolts, and the two ends of the protective cover 1 are fixed by means of edge sealant;

[0049] V. The anti-freezing structure is operated, and during the cold period, the ice crushing structure 2 closest to the water level line plays a role when the water level changes, and the ice layer only climbs to the ice crushing structure 2 near the water level line to form a near-dam ice crushing area, and the fold angle between the flat plate and the arc plate of the ice crushing structure 2 enhances the ice crushing effect, and according to the ice crushing effect during operation, the arrangement of the ice crushing structure 2 can be dynamically adjusted, and if the number is too large, it can be removed, and if the number is insufficient, it can be increased.

[0050] In the embodiment, the concrete panel 4 is a reinforced concrete anti-seepage structure located on the upstream face of the rockfill, generally with a slope ratio of 1:1.4~1:1.5 along the water flow direction, and is poured with concrete not less than C25, and the thickness is designed according to the water head bearing capacity, generally 0.3~1m.

[0051] The panel vertical joint 5 is a vertical joint between the concrete panels 4, generally 9~12m wide, and the joint is provided with a water stop structure 6;

[0052] The water stop structure 6 is a surface plastic water stop structure of the panel vertical joint, generally with a copper water stop piece at the bottom of the vertical joint, a V-shaped groove at the top of the vertical joint, plastic anti-seepage filler filled in the groove, and the surface is closed with an anti-seepage protective cover, and the two ends are fixed with angle steel or flat steel + bolts;

[0053] The concrete panel 4 is sequentially provided with a cushion layer 7, a transition area 8, and an upstream rockfill area 8;

[0054] Wherein for the cushion 7, the direct support body of the concrete panel 4, uniformly transmits water pressure to the rockfill body, and plays a seepage control role, the width is 1-4m, generally weak, slightly weathered material is processed and mixed, and the maximum particle size is generally not more than 8cm, and continuous gradation;

[0055] Wherein for the transition zone 8, the dam body subzone between the cushion 7 and the upstream rockfill zone 9, plays a protection and transition role, the width is 2-5m, generally weak, slightly weathered blasting excavation stone, continuous gradation;

[0056] Wherein for the upstream rockfill zone 9, the rockfill dam body located in the upstream part of the dam, is a main support body for bearing water load, generally weak, slightly weathered blasting excavation stone, continuous gradation;

[0057] The lowest water level 10 of the water level amplitude area is the lowest elevation of the reservoir water level change;

[0058] The highest water level 11 of the water level amplitude area is the highest elevation of the reservoir water level change.

[0059] It should be noted that the terms "including", "having", and "with" and any variations thereof in the description and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "mounting", "setting", "providing", "connecting", "connecting", "sleeving" should be understood broadly. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication between two mechanisms, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "one end", "the other end", "outer side", "inner side", "horizontal", "end", "length", "outer end", "left", "right" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application. The terms "first", "second" are only used for the convenience of description, and do not indicate or imply relative importance.

[0061] In addition, in the practice of the claims of the present application, those skilled in the art can understand and affect the changes of the disclosed embodiments through the study of the drawings, disclosure and attached claims. In addition, in the claims, the description, "including", "containing" and the like do not exclude other elements or steps, and the singular noun does not exclude its plural form.

[0062] The above are only preferred embodiments of the present application, and are not intended to limit the scope of the present application, that is, any equivalent changes and modifications made according to the present application are all covered by the scope of the present application, which will not be repeated here.

Claims

1. A prefabricated concrete-faced rockfill dam anti-freezing structure, wherein a water-stopping structure (6) is provided in the vertical joint (5) between two adjacent concrete panels (4), characterized in that, The anti-freezing structure is set between the lowest water level (10) and the highest water level (11) in the water level fluctuation zone, and includes several ice-breaking structures (2) arranged parallel to the slope direction of the concrete panel (4). The ice-breaking structures (2) are detachably connected to the surface of the concrete panel (4).

2. The prefabricated concrete-faced rockfill dam anti-freezing structure as described in claim 1, characterized in that, A protective cover (1) is provided between several ice-breaking structures (2) on two adjacent concrete panels (4). A water-stopping structure (6) is located inside the protective cover (1). The protective cover (1) is detachably connected to the surface of the concrete panel (4). The two ends of the protective cover (1) are fixed with an edge sealant.

3. The prefabricated concrete-faced rockfill dam anti-freezing structure as described in claim 2, characterized in that, One end of the ice-crushing structure (2) on the same horizontal line is adjacent to the protective cover (1).

4. The prefabricated concrete-faced rockfill dam anti-freezing structure as described in claim 2, characterized in that, The front side of the ice-breaking structure (2) faces the lowest water level (10) of the water level fluctuation zone. The front side of the ice-breaking structure (2) is set as an arc plate. The lower end of the arc plate is attached to the concrete panel (4), and the upper end of the arc plate is raised away from the concrete panel (4).

5. The prefabricated concrete-faced rockfill dam anti-freezing structure as described in claim 4, characterized in that, The ice-crushing structure (2) is a "plant" shaped structure. The upper side of the ice-crushing structure (2) is a horizontally set flat plate. The flat plate and the arc plate form an angle. One end of the flat plate is attached to the concrete panel (4).

6. The prefabricated concrete-faced rockfill dam anti-freezing structure as described in claim 4, characterized in that, Several reinforcing ribs (3) are fixed to the rear side of the arc-shaped plate.

7. The prefabricated concrete-faced rockfill dam anti-freezing structure as described in claim 6, characterized in that, The protective cover (1), the ice-crushing structure (2), and the reinforcing rib (3) are all made of stainless steel.

8. The prefabricated concrete-faced rockfill dam anti-freezing structure as described in claim 2, characterized in that, The lower end of the protective cover (1) is below the lowest water level (10) of the water level fluctuation zone, and the upper end of the protective cover (1) is above the highest water level (11) of the water level fluctuation zone.

9. The prefabricated concrete-faced rockfill dam anti-freezing structure as described in claim 1, characterized in that, The ice-breaking structure (2) is fixed to the concrete panel (4) using countersunk bolts.

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