Arc-shaped face rockfill dam structure capable of preventing crushing rupture and face rockfill dam

Abstract

The invention belongs to the technical field of water-power engineering, and particularly relates to an arc-shaped face rockfill dam structure capable of preventing crushing rupture. The arc-shaped face rockfill dam structure comprises a concrete faced rockfill dam and a concrete face. The concrete faced rockfill dam and the concrete face are in the shape of an arc which protrudes towards the upstream on the horizontal plane. According to the arc-shaped face rockfill dam structure capable of preventing crushing rupture, the face crushing stress can be offset through the arc-shaped structure, axial displacement of the face towards the riverbed portion is reduced or avoided, the working stress state of the face is improved, the crushing rupture condition of the face is also reduced or avoided, and thus the working state of the face is greatly improved.

Description

technical field

[0001] The invention belongs to the technical field of hydropower engineering, and in particular relates to an arc-shaped face rockfill dam structure and a face face rockfill dam for preventing extrusion damage. Background technique

[0002] In recent years, concrete face rockfill dams have developed rapidly in my country due to their advantages of strong adaptability to topographic and geological conditions of the dam site area, superior economy, safety and reliability, and the dam height has been developed to 300m. Due to the difference in topography and geological conditions, the rockfill body deforms from both banks to the riverbed. In concrete face rockfill dams, the faceplate of the riverbed is usually under compression, and the faceplate of the abutments on both banks is under tension. Compressive vertical joints were set up on the slabs of the compressive part, tensile vertical joints were set up on the slabs of the abutments on both sides of the bank...

Examples

Embodiment 1

[0021] In order to overcome the defect that the anti-seepage system of the face rockfill dam is seriously damaged due to mutual extrusion damage of the existing face plates, the present invention provides such figure 1 with figure 2 The curved face rockfill dam structure for preventing extrusion damage includes a concrete face rockfill dam and a concrete face 5, and the concrete face rockfill dam and the concrete face are in an arc convex to the upstream on the horizontal plane.

[0022] The present invention offsets the extrusion stress of the panel through the arc-shaped face rockfill dam structure, reduces or avoids the axial displacement of the panel to the riverbed, improves the working stress state of the panel, reduces or avoids the situation of panel extrusion damage, and greatly improves the The working state of the panel.

Embodiment 2

[0024] On the basis of Example 1, such as figure 1 As shown, the top of the concrete panel 5 is connected with a wave wall 14, and a seam is provided between the bottom of the wave wall 14 and the top of the concrete panel 5, and the seam is the first peripheral seam 4, the first peripheral seam 4 The arc shape can make the stress distribution between the dam body and the concrete face plate 5 more uniform, and adjust and reduce the compressive stress at the joint between the dam body and the concrete face plate 5 .

[0025] Such as figure 1 As shown, there is a seam between the concrete panel 5 and the toe board 10, the seam is the second peripheral seam 6, and the second peripheral seam 6 is a straight line. The bending moment transmitted from the dam body to the toe plate 10 is reduced through the second peripheral seam 6, thereby reducing or even eliminating the vertical tensile stress on the upstream surface of the dam body, so that the stress distribution on the contact...

Embodiment 3

[0027] On the basis of Example 1, such as figure 1 As shown, the arc radius 1 and the rise height 2 of the arc-shaped face rockfill dam structure can be determined by combining the topographic and geological conditions, through finite element calculation, and assuming that the vertical joint 7 does not undergo extrusion deformation.

technical field

[0001] The invention belongs to the technical field of hydropower engineering, and in particular relates to an arc-shaped face rockfill dam structure and a face face rockfill dam for preventing extrusion damage. Background technique

[0002] In recent years, concrete face rockfill dams have developed rapidly in my country due to their advantages of strong adaptability to topographic and geological conditions of the dam site area, superior economy, safety and reliability, and the dam height has been developed to 300m. Due to the difference in topography and geological conditions, the rockfill body deforms from both banks to the riverbed. In concrete face rockfill dams, the faceplate of the riverbed is usually under compression, and the faceplate of the abutments on both banks is under tension. Compressive vertical joints were set up on the slabs of the compressive part, tensile vertical joints were set up on the slabs of the abutments on both sides of the bank...

Examples

Embodiment 1

[0021] In order to overcome the defect that the anti-seepage system of the face rockfill dam is seriously damaged due to mutual extrusion damage of the existing face plates, the present invention provides such figure 1 with figure 2 The curved face rockfill dam structure for preventing extrusion damage includes a concrete face rockfill dam and a concrete face 5, and the concrete face rockfill dam and the concrete face are in an arc convex to the upstream on the horizontal plane.

[0022] The present invention offsets the extrusion stress of the panel through the arc-shaped face rockfill dam structure, reduces or avoids the axial displacement of the panel to the riverbed, improves the working stress state of the panel, reduces or avoids the situation of panel extrusion damage, and greatly improves the The working state of the panel.

Embodiment 2

[0024] On the basis of Example 1, such as figure 1 As shown, the top of the concrete panel 5 is connected with a wave wall 14, and a seam is provided between the bottom of the wave wall 14 and the top of the concrete panel 5, and the seam is the first peripheral seam 4, the first peripheral seam 4 The arc shape can make the stress distribution between the dam body and the concrete face plate 5 more uniform, and adjust and reduce the compressive stress at the joint between the dam body and the concrete face plate 5 .

[0025] Such as figure 1 As shown, there is a seam between the concrete panel 5 and the toe board 10, the seam is the second peripheral seam 6, and the second peripheral seam 6 is a straight line. The bending moment transmitted from the dam body to the toe plate 10 is reduced through the second peripheral seam 6, thereby reducing or even eliminating the vertical tensile stress on the upstream surface of the dam body, so that the stress distribution on the contact...

Embodiment 3

[0027] On the basis of Example 1, such as figure 1 As shown, the arc radius 1 and the rise height 2 of the arc-shaped face rockfill dam structure can be determined by combining the topographic and geological conditions, through finite element calculation, and assuming that the vertical joint 7 does not undergo extrusion deformation.

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