Seepage-proofing structure of core wall and wave wall

Abstract

The utility model relates to an anti-seepage structure of a core wall and a wave wall, which is suitable for the core wall and the wave wall and comprises a deformation coordinating piece, a first end of the deformation coordinating piece is embedded and fixed in the core wall, a second end of the deformation coordinating piece is embedded and fixed in the wave wall, and the core wall and the wave wall are arranged in a staggered mode in the water flow direction so that the core wall and the wave wall can be kept connected through the deformation coordinating piece. According to the anti-seepage structure of the core wall and the wave wall, the core wall and the wave wall are arranged in the staggered mode, the deformation coordinating piece is arranged between the core wall and the wave wall, when the dam crest settles or cracks occur, it is ensured that the core wall and the wave wall are always kept connected while the deformation coordinating piece deforms, water stops of the core wall and the wave wall are prevented from being pulled open, and in other words, water leakage is avoided. The problem that the water stop is pulled open due to inconsistent settlement of the core wall and the dam shell is solved, the reliability of the anti-seepage body is improved, and the safety of the dam is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of water conservancy dam body anti-seepage, and specifically relates to an anti-seepage structure of a core wall and a wave-breaking wall. Background Art

[0002] Asphalt concrete core wall has strong deformation adaptability, so it is widely used in rockfill dam core wall or gravel dam core wall, and is used as the dam anti-seepage body. However, the connection between the asphalt concrete core wall and the dam top wave-breaking wall is a weak link. In order to solve this problem, the traditional approach is to offset the asphalt concrete core wall upstream to the bottom of the wave-breaking wall and set up water stop and anti-seepage. This method has the following defects:

[0003] The elastic modulus of the asphalt concrete core wall is smaller than that of the gravel dam shell material or the rockfill dam shell material. Generally, the elastic modulus of the dam shell material is about twice that of the asphalt concrete core wall, which leads to uneven settlement and deformation of the asphalt concrete core wall. It is easy for the settlement of the asphalt concrete core wall to be greater than that of the dam shell material, causing the waterstop between the asphalt core wall and the wave-breaking wall to be pulled apart, which in turn leads to leakage of the anti-seepage body and threatens the safety of the dam. Utility Model Content

[0004] The utility model aims to provide an anti-seepage structure of a core wall and a wave-breaking wall to overcome the above technical defects.

[0005] In order to solve the above technical problems, the utility model provides an anti-seepage structure of a core wall and a wave-breaking wall, which is applicable to the core wall and the wave-breaking wall. The anti-seepage structure includes:

[0006] The first end of the deformable coordination piece is embedded and fixed in the core wall, and the second end of the deformable coordination piece is embedded and fixed in the wave-breaking wall. The core wall and the wave-breaking wall are staggered along the water flow direction so that the core wall and the wave-breaking wall can be connected through the deformable coordination piece.

[0007] Deformation coordination components include:

[0008] The water-stop copper sheet has at least two opposite sides, namely a first side and a second side, the first side is embedded and anchored in the core wall, and the second side is embedded and anchored in the wave-breaking wall;

[0009] Flexible filler is filled in the space formed by the core wall, wave-breaking wall and the lower surface of the water-stop copper sheet to provide support and deformation conditions for the water-stop copper sheet;

[0010] Second-stage grouting: when the water-stop copper sheet is deformed or collapsed, the second-stage grouting is injected into the space formed by the core wall, wave-breaking wall and the upper surface of the water-stop copper sheet.

[0011] Water-stop copper sheet includes:

[0012] The copper sheet body has a concave middle portion, and the concave position has a U-shaped cross-section along the width direction. The two side edges of the U-shaped opening end extend away from each other in the horizontal direction to form flanges. The two flanges are first bent vertically downward and then bent horizontally to finally form the first side and the second side of the water-stop copper sheet.

[0013] The wave-breaking wall is L-shaped;

[0014] The vertical part of the L-shape is parallel to the core wall;

[0015] A gap is left between the horizontal part of the L-shape and the core wall to install the deformation coordination piece.

[0016] The embedding and anchoring position of the first edge of the water-stop copper sheet and the core wall is close to the top surface of the core wall;

[0017] The second side of the water-stop copper sheet is embedded and anchored in the horizontal part of the L-shaped wave-breaking wall.

[0018] The anti-seepage structure also includes:

[0019] The supporting part covers the deformation coordination part.

[0020] The support part includes:

[0021] Supporting ground beams, which are attached to the downstream side of the core wall;

[0022] The slab covers the waterproof copper sheet and the top surface of the core wall;

[0023] The cushion layer is set in the gap between the slab and the core wall.

[0024] The board includes:

[0025] The flat plate has two opposite edges which extend vertically downwards respectively, and the extended ends are respectively fixed to the wave-breaking wall and the supporting ground beam.

[0026] The anti-seepage structure of the core wall and the wave-breaking wall provided by the utility model is suitable for the connection position of the core wall and the wave-breaking wall. The core wall and the wave-breaking wall are arranged in a staggered manner, and a deformation coordination member is arranged between the two. When the dam top settles or cracks, the deformation coordination member deforms while ensuring that the core wall and the wave-breaking wall are always connected, preventing the water stop of the core wall and the wave-breaking wall from being pulled apart, that is, solving the problem of water stop pulling apart caused by inconsistent settlement of the core wall and the dam shell material, improving the reliability of the anti-seepage body, and ensuring the safety of the dam.

[0027] In order to make the above contents of the present invention more clearly understood, preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the anti-seepage structure of the core wall and the wave-breaking wall.

[0029] Figure 2 This is a cross-sectional view of the completed anti-seepage structure construction of the core wall and wave-breaking wall.

[0030] Figure 3 It is a cross-sectional view of the later operation of the anti-seepage structure of the core wall and wave-breaking wall.

[0031] Description of reference numerals:

[0032] 1. Asphalt concrete core wall;

[0033] 2. Wave-breaking wall;

[0034] 3. Deformation coordination parts; 3-1. Water-stop copper sheet; 3-2. Flexible filler; 3-3. Second-stage grouting;

[0035] 4. Support part; 4-1. Supporting ground beam; 4-2. Strapping board; 4-3. Cushion layer;

[0036] 5. Dam filling. DETAILED DESCRIPTION

[0037] The following is an explanation of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0038] It should be noted that, in the present invention, the top, bottom, left and right in the figure are regarded as the top, bottom, left and right of the anti-seepage structure of the core wall and the wave-breaking wall described in this specification.

[0039] The exemplary embodiments of the present invention are now introduced with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0040] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0041] This embodiment relates to an anti-seepage structure of a core wall and a wave-breaking wall, and is applicable to a core wall 1 and a wave-breaking wall 2. The dam where the core wall 1 and the wave-breaking wall 2 are located is formed by a dam filler 5. For details, please refer to Figure 1The anti-seepage structure includes a deformation coordination member 3, a first end of which is embedded and fixed in the core wall 1, and a second end of which is embedded and fixed in the wave-breaking wall 2. The core wall 1 and the wave-breaking wall 2 are staggered along the direction of water flow so that the core wall 1 and the wave-breaking wall 2 can be kept connected through the deformation coordination member 3.

[0042] The dam filling material 5 is mainly the dam shell material.

[0043] The wave-breaking wall 2 is arranged upstream of the core wall 1, and the core wall 1 and the wave-breaking wall 2 are staggered along the water flow direction. Specifically, the wave-breaking wall 2 is L-shaped, the vertical part of the L-shape is parallel to the core wall 1, and the horizontal part of the L-shape reserves a gap with the core wall 1 to install the deformation coordination piece 3.

[0044] The core wall 1 may be an asphalt concrete core wall.

[0045] In some embodiments, the downstream edge (horizontal side) of the wave-breaking wall 2 and the upstream edge of the core wall 1 are staggered by 0.5 to 1.5 m, with the larger value being taken for the high dam and the smaller value being taken for the bottom dam; the top surface elevation of the foundation of the wave-breaking wall 2 is not lower than the top elevation of the core wall 1; the foundation thickness of the wave-breaking wall 2 is not less than 30 cm, and the wave-breaking wall 2 is made of reinforced concrete with a concrete strength not lower than C25.

[0046] When settlement or cracks occur on the dam top, the deformation coordination member 3 deforms while ensuring that the core wall 1 and the wave-breaking wall 2 always remain connected, preventing the waterstops of the core wall 1 and the wave-breaking wall 2 from being pulled apart, that is, solving the problem of waterstop pulling apart caused by inconsistent settlement of the core wall 1 and the dam shell material.

[0047] The deformation coordination element 3 has two states, namely Figure 2 The construction status shown is completed and Figure 3 The later runtime state shown is compared Figure 2 and Figure 3 It can be seen that during the later operation, the deformation coordination member 3 has been deformed, but the core wall 1 and the wave-breaking wall 2 are still connected.

[0048] Specifically, see Figure 2 or Figure 3 , deformation coordination element 3 includes:

[0049] (1) The water-stop copper sheet 3-1 has at least two opposite sides, namely a first side and a second side. The first side is embedded and anchored in the core wall 1, and the second side is embedded and anchored in the wave-breaking wall 2. The first side is the first end of the deformation coordination member 3, and the second side is the second end of the deformation coordination member 3.

[0050] The water-stop copper sheet 3-1 includes a copper sheet main body, the middle part of which is concave, and the cross-section of the concave position along the width direction is U-shaped. The two side edges of the U-shaped opening end extend away from each other in the horizontal direction to form flanges, and the two flanges are first bent vertically downward and then bent horizontally to finally form the first side and the second side of the water-stop copper sheet 3-1.

[0051] See also Figure 2 or Figure 3 The overall shape of the water-stop copper sheet 3-1 is M-shaped.

[0052] The embedding and anchoring position of the first side of the water-stop copper sheet 3 - 1 and the core wall 1 is close to the top surface of the core wall 1 , and the second side of the water-stop copper sheet 3 - 1 is embedded and anchored in the horizontal part of the L-shaped wave-breaking wall 2 .

[0053] In some embodiments, the depth of the U-shaped water-stop copper sheet 3-1 is not less than 20 cm, and the depth is increased for high dams, thereby increasing its deformation capacity. The embedding point of the water-stop copper sheet 3-1 is not less than 15 cm from the edge of the core wall 1 and the wave-breaking wall 2, and the end parts are bent horizontally outward to increase the anchoring force between the water-stop copper sheet 3-1 and the structure.

[0054] (2) The flexible filler 3-2 is filled in the space formed by the core wall 1, the wave-breaking wall 2, and the lower surface of the water-stop copper sheet 3-1 to provide support and deformation conditions for the water-stop copper sheet 3-1. The flexible filler 3-2 should have a large compression deformation capacity.

[0055] In some embodiments, the flexible filler 3 - 2 is made of polypropylene sealing material.

[0056] according to Figure 2 It can be seen that after the construction is completed, the top surface elevation of the horizontal part of the wave-breaking wall 2 is basically flush with the top surface elevation of the core wall 1, the water-stop copper sheet 3-1 is slightly higher than the top surface elevations of the two, and the flexible filler 3-2 is filled in the space formed by the upstream side of the core wall 1, the downstream side of the wave-breaking wall 2, and the lower surface of the water-stop copper sheet 3-1, and the bottom surface of the flexible filler 3-2 is flush with the bottom surface of the horizontal part of the wave-breaking wall 2.

[0057] (3) Second stage grouting 3-3, when the water stop copper sheet 3-1 is deformed or collapsed, that is, Figure 3 During the normal operation shown, the second phase grouting 3-3 is injected into the space formed by the core wall 1, the wave-breaking wall 2, and the upper surface of the water-stop copper sheet 3-1.

[0058] In some embodiments, the second phase grouting 3-3 uses polypropylene sealing material.

[0059] The anti-seepage structure further comprises a support part 4 , which covers the deformation coordination part 3 . The main function of the support part 4 is to protect the dam top structure when the core wall 1 sinks relatively.

[0060] Specifically, the support portion 4 includes:

[0061] (a) The supporting ground beam 4 - 1 is close to the downstream side of the core wall 1 .

[0062] See also Figure 2 and Figure 3 The supporting ground beam 4 - 1 is a square beam or a rectangular beam, which is arranged on the downstream side of the core wall 1 , and the top elevation is flush with the top of the core wall 1 .

[0063] In some embodiments, the width of the supporting ground beam 4-1 is not less than 30 cm, and the height is not less than 30 cm.

[0064] In some embodiments, the supporting ground beam 4-1 is made of plain concrete, and the concrete strength is not less than C20.

[0065] (b) The butt plate 4 - 2 covers the waterproof copper sheet 3 - 1 and the top surface of the core wall 1 .

[0066] like Figure 2 and Figure 3 As shown, the strapping plate 4-2 comprises a flat plate, two opposite edges of which extend vertically downward respectively, and the extended ends are respectively fixed to the wave-breaking wall 2 and the supporting ground beam 4-1.

[0067] The slats 4-2 are arranged above the horizontal part of the supporting ground beam 4-1 and the wave-breaking wall 2, and completely wrap the water-stop copper sheet 3-1 and the core wall 1, leaving a gap between the core wall 1, and the gap height is not less than 5cm, mainly to prevent the water-stop from being damaged by excessive ballast, and at the same time provide a larger deformation space for the water-stop.

[0068] The thickness of the slab 4-2 is mainly determined by its span and the dam top load, and shall not be less than 10 cm.

[0069] In some embodiments, the buttress plate 4 - 2 is made of reinforced concrete, and the concrete strength is not less than C25.

[0070] (c) The cushion layer 4 - 3 is arranged in the gap between the butt plate 4 - 2 and the core wall 1 .

[0071] The cushion layer 4-3 and the water-stop copper sheet 3-1 together provide a construction surface for the slab 4-2. The cushion layer 4-3 is preferably made of plain concrete with a concrete strength not less than C15. Medium-coarse sand may also be used. When plain concrete is used, the slab 4-2 should be constructed after the plain concrete has completely set.

[0072] During normal operation, when a large cavity appears between the core wall 1 and the slab 4-2, the second-stage grouting 3-3 is set, and the second-stage grouting 3-3 is filled by drilling grouting.

[0073] For the anti-seepage structure of the core wall and wave-breaking wall, please refer to Figure 1-3 , the construction sequence is:

[0074] First, complete the dam filling material 5 and the core wall 1 below the bottom of the wave-breaking wall 2, generally in a layered filling construction; then construct the top core wall 1, and pre-embed the water-stop copper sheet 3-1; then construct the foundation (horizontal part) of the wave-breaking wall 2, and complete the construction of the water-stop copper sheet 3-1 at the same time, and then construct the vertical section of the wave-breaking wall 2; then construct the supporting ground beam 4-1; then construct the flexible filler 3-2, filling from one end of the dam axis to the other end, or from the middle to both ends. During the filling process, observe the water-stop copper sheet 3-1 at all times, and use sandbags to ballast the water-stop copper sheet 3-1 when necessary; then construct the cushion layer 4-3; after the strength of the wave-breaking wall 2 and the supporting ground beam 4-1 reaches 50% of the design strength, construct the slab 4-2; after the strength of the slab 4-2 reaches 75% of the design strength, construct the dam top part of the dam filling material 5.

[0075] The normal operation of the utility model is that after the construction is completed, the dam shell material settles less under the action of its own weight, while the asphalt concrete core wall settles more. The settlement of the asphalt concrete core wall drives the water-stop copper sheet 3-1 to move downward. Since the water-stop copper sheet 3-1 has a large deformation capacity and space, the safety of the anti-seepage system is guaranteed. During the operation period, it is necessary to constantly observe the settlement and cracks of the dam top. When settlement or cracks occur on the dam top, the second-stage grouting 3-3 is promptly drilled into the bottom of the slab 4-2 to further improve the safety of the dam top structure.

[0076] The anti-seepage structure is mainly used for the connection between the asphalt concrete core wall and the wave-breaking wall. The deformation capacity of the water stop is increased by staggering the asphalt concrete core wall and the wave-breaking wall and setting a deformation coordination structure. The problem of the water stop being pulled apart due to inconsistent settlement of the asphalt concrete core wall and the dam shell material is solved, the reliability of the anti-seepage body is improved, and the safety of the dam is ensured.

[0077] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An anti-seepage structure of a core wall and a wave-breaking wall, applicable to a core wall (1) and a wave-breaking wall (2), characterized in that: The anti-seepage structure includes: A deformation coordination member (3) has a first end embedded and fixed in the core wall (1), and a second end embedded and fixed in the wave-breaking wall (2); the core wall (1) and the wave-breaking wall (2) are arranged staggered along the direction of water flow, so that the core wall (1) and the wave-breaking wall (2) are kept connected through the deformation coordination member (3).

2. The anti-seepage structure of the core wall and the wave-breaking wall according to claim 1 is characterized in that: The deformation coordination member (3) comprises: The water-stop copper sheet (3-1) has at least two opposite sides, namely a first side and a second side, wherein the first side is embedded and anchored in the core wall (1), and the second side is embedded and anchored in the wave-breaking wall (2); A flexible filler (3-2) is filled in the space formed by the core wall (1), the wave-breaking wall (2), and the lower surface of the water-stop copper sheet (3-1), so as to provide support and deformation conditions for the water-stop copper sheet (3-1); Second-stage grouting (3-3), when the water-stopping copper sheet (3-1) is deformed or collapsed, the second-stage grouting (3-3) is injected into the space formed by the core wall (1), the wave-breaking wall (2), and the upper surface of the water-stopping copper sheet (3-1).

3. The anti-seepage structure of the core wall and the wave-breaking wall according to claim 2 is characterized in that: The water-stop copper sheet (3-1) comprises: The copper sheet body has a concave middle portion, and the concave position has a U-shaped cross section along the width direction. The two side edges of the U-shaped opening end extend away from each other in the horizontal direction to form flanges. The two flanges are first bent vertically downward and then bent horizontally, finally forming the first side and the second side of the water-stop copper sheet (3-1).

4. The anti-seepage structure of the core wall and the wave-breaking wall according to claim 2 or 3, characterized in that: The wave-breaking wall (2) is L-shaped; The L-shaped vertical portion is parallel to the core wall (1); A gap is reserved between the L-shaped horizontal portion and the core wall (1) for installing the deformation coordination member (3).

5. The anti-seepage structure of the core wall and the wave-breaking wall according to claim 4, characterized in that: The embedding and anchoring position of the first edge of the water-stop copper sheet (3-1) and the core wall (1) is close to the top surface of the core wall (1); The second edge of the water-stop copper sheet (3-1) is embedded and anchored in the horizontal portion of the L-shaped wave-breaking wall (2).

6. The anti-seepage structure of the core wall and the wave-breaking wall according to claim 2, characterized in that: The anti-seepage structure also includes: A support portion (4), wherein the support portion (4) covers the deformation coordination component (3).

7. The anti-seepage structure of the core wall and the wave-breaking wall according to claim 6, characterized in that: The support portion (4) comprises: A supporting ground beam (4-1) which is closely attached to the downstream side of the core wall (1); a butt plate (4-2), the butt plate (4-2) covering the water-stop copper sheet (3-1) and the top surface of the core wall (1); The cushion layer (4-3) is arranged in the gap between the butt plate (4-2) and the core wall (1).

8. The anti-seepage structure of the core wall and the wave-breaking wall according to claim 7, characterized in that: The butt plate (4-2) comprises: A flat plate, wherein two opposite edges of the flat plate respectively extend vertically downward, and the extended ends are respectively fixed to the wave-breaking wall (2) and the supporting ground beam (4-1).

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