Wave wall structure of concrete faced rockfill dam and construction method

Abstract

The invention belongs to the technical field of dam design and construction, and particularly relates to a wave wall structure of a concrete faced rockfill dam and a construction method. The face rockfill dam wave wall structure comprises a rockfill body, a concrete face is arranged on the side, close to a river channel, of the rockfill body, a wave wall is arranged on the side, close to the concrete face, of the upper portion of the rockfill body, the wave wall comprises a toe wall, a bottom plate and a plate wall, the toe wall is arranged on the upstream of the lower portion of the bottom plate, and the plate wall is arranged on the upper portion of the bottom plate. The toe wall is arranged along the edge of the top of the concrete panel, a horizontal seam is reserved between the toe wall and the concrete panel, and a water stop component is arranged in the horizontal seam. According to the concrete faced rockfill dam wave wall, the horizontal seam structure is adopted, so that the seam between the toe wall moving upwards on the wave wall and the panel is horizontal and straight; and the panel is constructed by a slip form with a set gradient, so that the dam body panel slip form and top waterstop mechanical construction is facilitated, and the stress safety of the dam body panel and the waterproof reliability of the waterstop component are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of dam design and construction, and in particular relates to a wave-breaking wall structure of a face rockfill dam and a construction method. Background Art

[0002] The face concrete rockfill dam is supported by the rockfill body to bear the water load. The dam body anti-seepage system consists of the upstream concrete face plate, the bank slope toe plate, and the dam top wave-breaking wall. A horizontal seam is formed between the dam top wave-breaking wall and the concrete face plate. Due to the broken edges and particles of the rockfill body, the rockfill body has significant rheology under the action of its own weight after the dam is filled, and a large settlement deformation occurs on the dam top. The rockfill body filling height should reserve the settlement after the dam body is filled, and the reserved settlement super height needs to vary according to the height of different parts of the riverbed and bank slope.

[0003] At present, the existing rockfill construction generally reserves a certain settlement height at the bottom of the wave-breaking wall, and steepens the slope of a certain range of the top of the upstream concrete panel, resulting in the horizontal joint between the dam top wave-breaking wall and the concrete panel changing with the filling height of different parts, which is not conducive to the panel slipform construction and mechanized construction of joint water-stopping, increasing the construction difficulty and construction cost. In addition, after the panel becomes steeper, a large angle bend is formed, causing this part to become a weak part of the panel. Summary of the invention

[0004] In view of the above problems, the object of the present invention is to provide a panel rockfill dam wave-breaking wall structure and a construction method. Under the premise of meeting the requirement of reserved super-high settlement at the top of the rockfill body, the upstream slope of the rockfill body and the concrete panel do not need to be provided with a local steep slope section, so that the horizontal joint between the upstream toe wall of the wave-breaking wall and the concrete panel is straight; the upstream slope of the rockfill body is filled with a set slope, and the concrete panel is constructed by slipform construction with a set slope, which facilitates the slipform construction of the dam body concrete panel and the mechanized construction of the top water stop, improves the stress safety of the dam body concrete panel and the waterproof reliability of the water stop structure of the horizontal joint, and reduces the difficulty and cost of constructing the panel and the horizontal joint of the wave-breaking wall.

[0005] The technical solution of the present invention is: a wave-breaking wall structure of a panel rockfill dam, comprising a rockfill body, a concrete panel is provided on the side of the rockfill body close to the river channel, a wave-breaking wall is provided on the upper part of the rockfill body close to the concrete panel, the wave-breaking wall comprises a toe wall, a bottom plate and a plate wall, a toe wall is provided upstream of the lower part of the bottom plate, a plate wall is provided on the upper part of the bottom plate, the toe wall is provided along the top edge of the concrete panel, a horizontal gap is left between the two, and a water-stop component is provided in the horizontal gap.

[0006] The waterstop component includes a top waterstop, a bottom waterstop and a caulking material. The top waterstop is arranged at the outer end of the horizontal seam, the bottom waterstop is arranged at the inner end of the horizontal seam, and the caulking material fills the gap between the top waterstop and the bottom waterstop.

[0007] The top water stop is arranged at the outer end of the horizontal seam and is V-shaped opening.

[0008] The caulking material is an asphalt wood board or a rubber board.

[0009] The surface of the concrete panel has a set slope, and the slope range is 1:1.3~1:1.6.

[0010] The rockfill body comprises cushion material, transition material and upstream rockfill material.

[0011] The top height H1 of the rockfill body and the bottom height H3 of the wave-breaking wall are both filled to reserve a certain settlement super-height Δh. After the dam settles, the top height of the rockfill body is H2 and the bottom height of the wave-breaking wall is H4, and the height of Δh is determined according to the settlement of the dam body; the height h1 of the toe wall upstream of the wave-breaking wall and the height h2 of the plate wall are related to the reserved settlement super-height Δh, and the height h1 of the toe wall can be the reserved settlement super-height Δh; the height h2 of the plate wall and the thickness t of the bottom plate should meet the wave height requirements of the reservoir operation.

[0012] The horizontal seam height H4 is the design height H4 of the bottom of the wave-breaking wall, and the height difference between the design height H4 of the bottom of the wave-breaking wall and the normal water level H5 is greater than the reserved settlement superheight Δh.

[0013] A construction method for a face rockfill dam wave-breaking wall structure, the construction of the face rockfill dam wave-breaking wall structure as described above, comprising the following steps: S1: The upstream slope of the dam is set to a certain slope and remains unchanged. The rockfill is filled to the design elevation of the bottom of the wave-breaking wall and overfilled to a certain height. After meeting the requirements of the settlement period and settlement rate of the dam rockfill, the rockfill at the bottom of the wave-breaking wall is excavated and leveled to the design elevation of the bottom of the wave-breaking wall; S2: Concrete panel is constructed. The concrete panel is slipformed from bottom to top with a slope to the design elevation of the bottom of the wave-breaking wall. There is no need to partially change the slope of the upstream slope. Before construction, the lower water-stopping component is buried at the inner end of the top of the concrete panel; S3: According to the reserved settlement superelevation of the designed rockfill body, determine the height of the toe wall upstream of the wave-breaking wall and the designed shape of the wave-breaking wall, and cast the toe wall upstream of the wave-breaking wall after filling to the filling elevation at the bottom of the wave-breaking wall to form a horizontal joint between the wave-breaking wall and the concrete panel. Before pouring, fill the caulking material in the horizontal joint between the toe wall upstream of the wave-breaking wall and the concrete panel; S4: After the toe wall upstream of the wave-breaking wall is completed, the upper water-stopping components of the horizontal joints are constructed and connected with the water-stopping structures of the vertical joints and peripheral joints of the concrete panel to form a complete water-stopping system. Subsequently, the bottom plate and plate wall of the wave-breaking wall are constructed, and the rockfill is filled to the top of the dam.

[0014] The technical effect of the present invention is that: under the premise of meeting the requirement of reserved super-high settlement at the top of the rockfill body, the upstream slope of the rockfill body and the concrete panel do not need to be provided with a local steep slope section, so that the horizontal joint between the upstream toe wall of the wave-breaking wall and the concrete panel is straight; the upstream slope of the rockfill body is filled with a set slope, and the concrete panel is constructed by a set slope slipform, which facilitates the slipform construction of the dam body concrete panel and the mechanized construction of the top water stop, improves the stress safety of the dam body concrete panel and the waterproof reliability of the water stop structure of the horizontal joint, and reduces the difficulty and cost of the panel and the horizontal joint construction of the wave-breaking wall.

[0015] The following is a further description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a wave-breaking wall structure of a panel rockfill dam according to an embodiment of the present invention.

[0017] Figure numerals: 1 - toe wall; 2 - bottom plate; 3 - plate wall; 4 - wave-breaking wall; 5 - concrete panel; 6 - horizontal joint; 7 - top water stop; 8 - bottom water stop; 9 - rockfill body; 10 - caulking. DETAILED DESCRIPTION Example 1

[0018] like Figure 1 As shown, a wave-breaking wall structure of a panel rockfill dam comprises a rockfill body 9, wherein a concrete panel 5 is provided on the side of the rockfill body 9 close to the river channel, a wave-breaking wall 4 is provided on the upper part of the rockfill body 9 close to the concrete panel 5, and the wave-breaking wall 4 comprises a toe wall 1, a bottom plate 2 and a plate wall 3, wherein the toe wall 1 is provided upstream of the lower part of the bottom plate 2, the plate wall 3 is provided on the upper part of the bottom plate 2, the toe wall 1 is provided along the top edge of the concrete panel 5, a horizontal seam 6 is left between the two, and a water-stopping member is provided in the horizontal seam 6.

[0019] During actual use, the concrete panel 5 of the present invention is laid on the upstream side of the rockfill body 9, and the surface of the concrete panel 5 has a set slope, and there is no need to set a steep slope section; the wave-breaking wall 4 is arranged on the upper part of the rockfill body 9, and the wave-breaking wall 4 is composed of a toe wall 1, a bottom plate 2, and a plate wall 3. The toe wall 1 is arranged upstream of the lower part of the bottom plate 2, and the upper part of the bottom plate 2 is a plate wall 3. The toe wall 1 is arranged along the top edge of the concrete panel 5, and the upstream toe wall 1 of the wave-breaking wall 4 is connected to the top of the concrete panel 5, and the joint is a horizontal seam 6; the horizontal seam 6 is provided with a water-stop component. The concrete panel 5 does not need to be provided with a local steep slope section, so that the joint horizontal seam 6 between the upstream toe wall 1 of the wave-breaking wall 4 and the concrete panel 5 is straight; the concrete panel 5 is constructed by a set slope slipform, which is convenient for the mechanized construction of the slipform of the dam body concrete panel 5 and the top water stop 7, and improves the stress safety of the dam body concrete panel 5 and the waterproof reliability of the water stop structure of the horizontal seam 6. Example 2

[0020] Preferably, on the basis of Example 1, in this embodiment, preferably, the water stop component includes a top water stop 7, a bottom water stop 8 and a caulking material 10, the top water stop 7 is arranged at the outer end of the horizontal seam 6, the bottom water stop 8 is arranged at the inner end of the horizontal seam 6, and the caulking material 10 fills the gap between the top water stop 7 and the bottom water stop 8.

[0021] During actual use, the top waterstop 7 of the present invention is arranged at the outer end of the horizontal seam 6, the bottom waterstop 8 is arranged at the inner end of the horizontal seam 6, and the caulking material 10 is filled in the gap between the top waterstop 7 and the bottom waterstop 8. The top waterstop 7 of the present invention is arranged at the outer end of the horizontal seam 6, which can cope with deformation and serve as the first anti-seepage line of the horizontal seam of the wave-breaking wall. The bottom waterstop pad is at the inner end of the horizontal joint between the wave-breaking wall and the panel, which can cope with deformation and serve as the second anti-seepage line of the horizontal seam of the wave-breaking wall. Example 3

[0022] Preferably, on the basis of Example 1 or Example 2, in this embodiment, preferably, the top water stop 7 is arranged at the outer end of the horizontal seam 6 and is a V-shaped opening.

[0023] During actual use, the top water stop 7 of the present invention is arranged at the outer end of the horizontal seam 6 and has a V-shaped opening, which can better cope with deformation and prevent leakage. Example 4

[0024] Preferably, on the basis of Example 1 or Example 3, in this embodiment, preferably, the caulking material 10 is an asphalt wood board or a rubber board.

[0025] In actual use, the caulking material 10 of the present invention is an asphalt wood board or a rubber board, and the caulking material is filled in the horizontal joints of the wave-breaking wall to adapt to the settlement and deformation of the dam rockfill body. Example 5

[0026] Preferably, on the basis of Example 1 or Example 4, in this embodiment, preferably, the surface of the concrete panel 5 has a set slope, and the slope range is 1:1.3~1:1.6.

[0027] During actual use, the surface of the concrete panel 5 of the present invention has a set slope, and the slope range is 1:1.3~1:1.6. The surface of the concrete panel 5 has a set slope, and there is no need to set a steep slope section separately on the top. The concrete panel 5 is constructed by slipform with set slope, which is convenient for the slipform of the dam panel and the mechanized construction of the top water stop, and improves the stress safety of the dam panel and the waterproof reliability of the water stop component. Example 6

[0028] Preferably, on the basis of Embodiment 1 or Embodiment 5, in this embodiment, preferably, the rockfill body 9 includes cushion material, transition material and upstream rockfill material.

[0029] In actual use, the rockfill body 9 of the present invention includes cushion material, transition material and upstream rockfill material to ensure that the rockfill body 9 meets the use requirements. Example 7

[0030] Preferably, on the basis of Example 1 or Example 6, in this embodiment, preferably, the top height H1 of the rockfill body 9 and the bottom height H3 of the wave-breaking wall 4 are both filled to reserve a certain settlement superheight Δh, and after the dam settles, the top height of the rockfill body 9 is H2 and the bottom height of the wave-breaking wall 4 is H4, and the height of Δh is determined according to the settlement of the dam body; the height h1 of the toe wall 1 upstream of the wave-breaking wall 4 and the height h2 of the plate wall 3 are related to the reserved settlement superheight Δh, and the height h1 of the toe wall 1 can be the reserved settlement superheight Δh; the height h2 of the plate wall 3 and the thickness t of the bottom plate 2 should meet the wave height requirements of reservoir operation.

[0031] In actual use, the top height H1 of the rockfill body 9 and the bottom height H3 of the wave-breaking wall 4 of the present invention are both filled to reserve a certain settlement extra height Δh to ensure that the reserved settlement of the dam top meets the safe operation requirements of the dam, and the design height of the wave-breaking wall also meets the reservoir operation requirements. Example 8

[0032] Preferably, on the basis of Example 1 or Example 7, in this embodiment, preferably, the height H4 of the horizontal seam 6 is the design height H4 of the bottom of the wave-breaking wall 4, and the height difference between the design height H4 of the bottom of the wave-breaking wall 4 and the normal water level H5 is greater than the reserved settlement superheight Δh.

[0033] During actual use, the height H4 of the horizontal seam 6 described in the present invention is the design height H4 of the bottom of the wave-breaking wall 4. The height difference between the design height H4 of the bottom of the wave-breaking wall 4 and the normal water level H5 is greater than the reserved settlement superheight Δh, so that the horizontal seam is still higher than the normal water level after the dam construction settlement, ensuring the safety of the horizontal seam of the dam. Example 9

[0034] A construction method for a face rockfill dam wave-breaking wall structure, the construction of the face rockfill dam wave-breaking wall structure as described above, comprising the following steps: S1: The upstream slope of the dam is set to a certain slope and remains unchanged. The rockfill body 9 is filled to the design elevation of the bottom of the wave-breaking wall 4 and overfilled to a certain height. After the settlement period and settlement rate requirements of the dam rockfill body are met, the rockfill body 9 at the bottom of the wave-breaking wall 4 is excavated and leveled to the design elevation of the bottom 4 of the wave-breaking wall; S2: Construct the concrete panel 5. The concrete panel 5 is slipformed from bottom to top with a slope to the design elevation of the bottom of the wave-breaking wall 4. There is no need to partially change the slope of the upstream slope. Before construction, the lower water-stopping component is buried at the inner end of the top of the concrete panel 5; S3: according to the reserved settlement superelevation of the designed rockfill body 9, the height of the toe wall 1 upstream of the wave-breaking wall 4 and the designed body shape of the wave-breaking wall 4 are determined, and after the filling reaches the filling elevation at the bottom of the wave-breaking wall, the toe wall 1 upstream of the wave-breaking wall 4 is cast to form a horizontal joint 6 between the wave-breaking wall 4 and the concrete panel 5, and before casting, the caulking material is filled in the horizontal joint 6 between the toe wall 1 upstream of the wave-breaking wall and the concrete panel 5; S4: After the toe wall 1 upstream of the wave-breaking wall 4 is completed, the upper water-stopping components of the horizontal joints 6 are constructed and connected with the water-stopping structures of the vertical joints and peripheral joints of the concrete panel 5 to form a complete water-stopping system. Subsequently, the bottom plate 2 and the plate wall 3 of the wave-breaking wall 4 are constructed, and the rockfill body 9 is filled to the dam top.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A wave-breaking wall structure of a face rockfill dam, characterized in that: The invention comprises a rockfill body (9), wherein a concrete panel (5) is provided on the side of the rockfill body (9) close to the river channel, and a wave-breaking wall (4) is provided on the upper part of the rockfill body (9) close to the concrete panel (5). The wave-breaking wall (4) comprises a toe wall (1), a bottom plate (2) and a plate wall (3). The toe wall (1) is provided upstream of the lower part of the bottom plate (2), and the plate wall (3) is provided on the upper part of the bottom plate (2). The toe wall (1) is provided along the top edge of the concrete panel (5), and a horizontal gap (6) is left between the two. A water-stopping component is provided in the horizontal gap (6).

2. According to claim 1, a face rockfill dam wave-breaking wall structure is characterized by: The water stop component comprises a top water stop (7), a bottom water stop (8) and a caulking material (10); the top water stop (7) is arranged at the outer end of the horizontal seam (6); the bottom water stop (8) is arranged at the inner end of the horizontal seam (6); and the caulking material (10) fills a gap between the top water stop (7) and the bottom water stop (8).

3. According to claim 2, a face rockfill dam wave-breaking wall structure is characterized by: The top water stop (7) is arranged at the outer end of the horizontal seam (6) and has a V-shaped opening.

4. According to claim 2, a face rockfill dam wave-breaking wall structure is characterized by: The caulking material (10) is an asphalt wood board or a rubber board.

5. According to claim 1, a face rockfill dam wave-breaking wall structure is characterized by: The surface of the concrete panel (5) has a set slope, and the slope range is 1:1.3-1:1.

6.

6. The wave-breaking wall structure of a face rockfill dam according to claim 1, characterized in that: The rockfill body (9) comprises cushion material, transition material and upstream rockfill material.

7. The wave-breaking wall structure of a face rockfill dam according to claim 1, characterized in that: The top height H1 of the rockfill body (9) and the bottom height H3 of the wave-breaking wall (4) are both filled to reserve a certain settlement superheight Δh. After the dam settles, the top height of the rockfill body (9) is H2 and the bottom height of the wave-breaking wall (4) is H4. The height of Δh is determined according to the settlement of the dam body. The height h1 of the toe wall (1) and the height h2 of the plate wall (3) upstream of the wave-breaking wall (4) are related to the reserved settlement superheight Δh. The height h1 of the toe wall (1) can be the reserved settlement superheight Δh. The height h2 of the plate wall (3) and the thickness t of the bottom plate (2) should meet the reservoir operation wave height requirements.

8. The wave-breaking wall structure of a face rockfill dam according to claim 1, characterized in that: The height H4 of the horizontal seam (6) is the design height H4 of the bottom of the wave-breaking wall (4), and the height difference between the design height H4 of the bottom of the wave-breaking wall (4) and the normal water level H5 is greater than the reserved settlement superheight Δh.

9. A method for constructing a wave-breaking wall structure of a face rockfill dam, comprising constructing a wave-breaking wall structure of a face rockfill dam as claimed in claim 1, characterized in that: The following steps are involved: S1: The upstream slope of the dam is set to a certain slope and remains unchanged. The rockfill body (9) is filled to the design elevation of the bottom of the wave-breaking wall (4) and is overfilled to a certain height. After the settlement period and settlement rate requirements of the dam rockfill body are met, the rockfill body (9) at the bottom of the wave-breaking wall (4) is excavated and leveled to the design elevation of the bottom of the wave-breaking wall (4); S2: constructing a concrete panel (5), wherein the concrete panel (5) is slipformed from bottom to top with a slope to the design elevation of the bottom of the wave-breaking wall (4), without locally changing the slope of the upstream slope, and before construction, a lower water-stopping component is buried at the inner end of the top of the concrete panel (5); S3: according to the reserved settlement superelevation of the designed rockfill body (9), the height of the toe wall (1) upstream of the wave-breaking wall (4) and the designed body shape of the wave-breaking wall (4) are determined, and after the filling reaches the filling elevation at the bottom of the wave-breaking wall, the toe wall (1) upstream of the wave-breaking wall (4) is cast to form a horizontal joint (6) between the wave-breaking wall (4) and the concrete panel (5), and before casting, the caulking material is filled in the horizontal joint (6) between the toe wall (1) upstream of the wave-breaking wall and the concrete panel (5); S4: After the toe wall (1) upstream of the wave-breaking wall (4) is completed, the upper water-stopping components of the horizontal joints (6) are constructed and connected with the water-stopping structures of the vertical joints and peripheral joints of the concrete panel (5) to form a complete water-stopping system. Subsequently, the bottom plate (2) and plate wall (3) of the wave-breaking wall (4) are constructed, and the rockfill body (9) is filled to the dam top.

Images