Dam abutment flood intercepting ditch for preventing debris flow from impacting dam slope

Abstract

The utility model belongs to the field of seepage drainage of tailings ponds, and relates to a dam abutment flood intercepting ditch for preventing debris flow from impacting a dam slope, which is used for preventing the debris flow from impacting a dam body of a tailings pond fill dam to cause damage to a dam body structure and even instability of the dam body. The dam abutment flood intercepting ditch comprises a bottom plate and side walls, the two side walls are located on the two opposite sides of the bottom plate to form a groove for water flow to pass through, the section, perpendicular to the water flow direction, of the groove is in an inverted trapezoid shape with the top open, and the groove is adjacent to a dam abutment of the fill dam. The section of the flood intercepting ditch is in an inverted trapezoid shape with an opening in the top, and one bevel edge waist of the inverted trapezoid is adjacent to the bank slope so that flood can smoothly enter and be discharged through the bank slope. The big-end-up structural style is beneficial for rapidly discharging soil and stones deposited in the flood intercepting ditch under the impact action of water flow.

Description

Technical Field

[0001] The utility model belongs to the field of tailings pond drainage, and in particular relates to a dam shoulder flood interception ditch for preventing debris flow from impacting a dam slope. Background Art

[0002] Tailings ponds are man-made high-potential energy granular bodies, and the safety of their dam bodies is related to the overall safety of tailings ponds. Most of my country's tailings ponds are located in mountainous areas, which are more likely to encounter local rainstorms during the flood season. The flood defense standards of tailings ponds are relatively high, so various geological disasters are bound to occur when encountering floods. According to the analysis of tailings pond accident cases, under the premise that the tailings pond dam body and flood discharge system are safe, encountering geological disasters is the main reason for the failure of tailings ponds. Therefore, it is extremely urgent to prevent the impact of geological disasters on the safety of tailings ponds. Utility Model Content

[0003] The utility model aims to provide a dam shoulder flood intercepting ditch for preventing debris flow from impacting the dam slope, so as to overcome the above technical defects.

[0004] In order to solve the above technical problems, the utility model provides a dam shoulder flood interception ditch for preventing debris flow from impacting the dam slope, which is suitable for the accumulation dam of the tailings pond, including:

[0005] Base plate;

[0006] Side walls, two of which are located on opposite sides of the bottom plate to form a groove for water flow to pass through, the groove is in the shape of an inverted trapezoid with an open top in a cross section perpendicular to the water flow direction, and the groove is adjacent to the shoulder of the dam.

[0007] According to a dam shoulder flood interception ditch for preventing debris flow from impacting a dam slope, the side wall comprises:

[0008] A first side wall, adjacent to a bank slope on the shoulder side of the accumulation dam, the first side wall extending along the bank slope to form a slope;

[0009] The second side wall is adjacent to the shoulder of the accumulation dam, and the second side wall is in a straight wall shape.

[0010] According to a dam shoulder flood interception ditch for preventing debris flow from impacting a dam slope, the straight wall top of the second side wall is higher than the dam surface of the accumulation dam.

[0011] According to a dam shoulder flood interception ditch for preventing debris flow from impacting a dam slope, the bottom plate and the side wall are both cast with reinforced concrete;

[0012] The steel bars are single-layer or double-layer reinforcements.

[0013] According to a dam shoulder flood interception ditch for preventing debris flow from impacting a dam slope, when the bottom plate is in a steep slope section, an anchor rod is arranged below the bottom plate;

[0014] The anchor rod is extended into and anchored in the ground so that the bottom plate and the foundation are firmly connected.

[0015] The utility model relates to a dam shoulder intercepting ditch for preventing debris flow from impacting a dam slope, which is used to prevent debris flow from impacting a tailings pond dam body, thereby causing the dam body structure to be destroyed or even the dam body to become unstable. The cross section of the dam shoulder intercepting ditch is an inverted trapezoid with an open top, and a sloping waist of the inverted trapezoid is adjacent to the bank slope so that the bank slope is used to allow floods to enter and drain smoothly; this structure type with a large top and a small bottom is conducive to quickly discharging soil and rocks deposited in the intercepting ditch under the impact of water flow.

[0016] 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

[0017] Figure 1 This is a schematic diagram of the dam shoulder flood diversion ditch to prevent debris flow from impacting the dam slope.

[0018] Description of reference numerals:

[0019] 10. Bottom plate;

[0020] 21. First side wall; 22. Second side wall;

[0021] 30. Grooves;

[0022] 40. Bank slope;

[0023] 50. Accumulation dam;

[0024] 60. Anchor rod. DETAILED DESCRIPTION

[0025] 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.

[0026] It should be noted that, in the present utility model, the up, down, left and right in the figure are regarded as the up, down, left and right of the dam shoulder flood intercepting ditch for preventing debris flow from impacting the dam slope as described in this specification.

[0027] 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.

[0028] 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.

[0029] This embodiment relates to a dam shoulder flood interception ditch for preventing debris flow from impacting the dam slope, which is suitable for the tailings pond dam 50, see Figure 1 The dam shoulder flood interception ditch includes a bottom plate 10 and side walls. There are two side walls, which are located on opposite sides of the bottom plate 10 to form a groove 30 for water flow to pass through. The cross section of the groove 30 along the perpendicular direction of the water flow is an inverted trapezoid with an open top, and the groove 30 is adjacent to the dam shoulder of the accumulation dam 50.

[0030] In some embodiments, the flood diversion ditch is located on a stable bedrock and is integrally connected to the bank slope bedrock to avoid potential hazards that may affect the structural safety, such as uneven settlement and contact scouring.

[0031] Generally speaking, the flood diversion ditch is set on the shoulders of both sides of the accumulation dam 50. Figure 1 It is a cross-sectional view along the dam surface direction of the left bank dam 50, that is, the cross section is perpendicular to the water flow direction. Figure 1 It can be seen that the left side of the dam is the bank slope 40 , and the flood diversion ditch is located between the bank slope 40 and the abutment of the accumulation dam 50 .

[0032] For details, please continue to see Figure 1 The side wall includes a first side wall 21 and a second side wall 22 .

[0033] The first side wall 21 is adjacent to the bank slope 40 on the abutment side of the accumulation dam 50. The first side wall 21 extends along the bank slope 40 to form a slope. That is, the first side wall 21 extends from bottom to top along the surface of the bank slope 40 to form a slope. Figure 1 The slope shown can be used to drive flood water in and out smoothly.

[0034] The second side wall 22 is adjacent to the abutment of the accumulation dam 50, and is in the shape of a straight wall. That is, the second side wall 22 is a vertical waist of a right-angled inverted trapezoid, and the structure formed is larger at the top and smaller at the bottom, which is conducive to quickly discharging the soil and rocks deposited in the flood interception ditch under the impact of water flow.

[0035] In some embodiments, Figure 1 As shown, the top of the straight wall of the second side wall 22 is higher than the dam surface of the accumulation dam 50. When the straight wall (second side wall 22) encounters water flow and debris flow impact, the raised portion can prevent the water flow and debris flow from directly rushing to the dam shoulder, and also help prevent the water flow and debris flow from dissipating energy after impacting the straight wall (second side wall 22) and bending back, thereby minimizing the impact force on the dam surface.

[0036] In some embodiments, the straight wall top of the second side wall 22 is about 300 mm to 500 mm higher than the dam surface of the accumulation dam 50 .

[0037] In some embodiments, the bottom plate 10 and the side walls are cast with reinforced concrete, and the steel bars are single-layer or double-layer reinforced. The purpose of this design is to maximize the structural strength and structural stability and improve its impact resistance.

[0038] In some embodiments, when the bottom plate 10 is in a steep slope section, an anchor rod 60 is provided below the bottom plate 10, and the anchor rod 60 extends into the ground and is anchored to firmly connect the bottom plate 10 to the foundation (or, to always maintain connection with the bedrock). That is, the top end of the anchor rod 60 is connected to the bottom plate 10, and the bottom end of the anchor rod 60 extends into the bedrock and is anchored. The purpose is to maximize the pull-out resistance and impact resistance of the flood interception ditch.

[0039] The above-mentioned steep slope refers to the channel bottom slope with a slope greater than the critical bottom slope, and also refers to a steeply rising slope.

[0040] The dam shoulder interception ditch for preventing debris flow from impacting the dam slope provided by the utility model can prevent the debris flow from the branch ditches and bank slopes on both sides of the accumulation dam from directly impacting the dam body, causing the dam body structure to be damaged or even unstable. The dam shoulder interception ditch is mainly suitable for the accumulation dam of the tailings pond, including a bottom plate and a side wall. The two side walls are located on opposite sides of the bottom plate to form a groove for water flow to pass through. The groove is in an inverted trapezoidal shape with an open top along the cross section perpendicular to the water flow direction, and the groove is adjacent to the shoulder of the accumulation dam. The side wall includes a first side wall, adjacent to the bank slope on the shoulder of the accumulation dam, and the first side wall extends along the bank slope to form a slope; and also includes a second side wall, adjacent to the shoulder of the accumulation dam, and the second side wall is in the shape of a straight wall. The straight wall top of the second side wall is higher than the dam surface of the accumulation dam. The bottom plate and the side wall are both cast with reinforced concrete, and the steel bars are single-layer or double-layer reinforcement. When the base plate is on a steep slope, anchor rods are arranged below the base plate, and the anchor rods are extended into and anchored underground so that the base plate and the anchor rods always remain connected.

[0041] 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. A dam shoulder interception ditch for preventing debris flow from impacting the dam slope, suitable for a tailings pond dam (50), characterized in that: include: Bottom plate (10); Side walls, the two side walls are located on opposite sides of the bottom plate (10) to form a groove (30) for water flow to pass through, the groove (30) is in the shape of an inverted trapezoid with an open top along a cross section perpendicular to the water flow direction, and the groove (30) is adjacent to the shoulder of the accumulation dam (50).

2. The dam shoulder flood interception ditch for preventing debris flow from impacting the dam slope according to claim 1 is characterized in that: The side wall comprises: A first side wall (21) is adjacent to a bank slope (40) on the shoulder side of the accumulation dam (50), the first side wall (21) extending along the bank slope (40) to form a slope; The second side wall (22) is adjacent to the shoulder of the accumulation dam (50), and the second side wall (22) is in the shape of a straight wall.

3. The dam shoulder flood interception ditch for preventing debris flow from impacting the dam slope according to claim 2 is characterized in that: The straight wall top of the second side wall (22) is higher than the dam surface of the accumulation dam (50).

4. The dam shoulder flood interception ditch for preventing debris flow from impacting the dam slope according to claim 1, characterized in that: The bottom plate (10) and the side walls are both cast using reinforced concrete; The steel bars are single-layer or double-layer reinforcements.

5. The dam shoulder flood interception ditch for preventing debris flow from impacting the dam slope according to claim 4 is characterized in that: When the bottom plate (10) is in a steep slope section, an anchor rod (60) is arranged below the bottom plate (10); The anchor rod (60) extends into and is anchored underground so that the base plate (10) and the foundation are firmly connected.

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