CN220266794U - Ventilation structure of drainage system - Google Patents

Abstract

The utility model discloses a ventilation structure of a drainage system, relates to the technical field of building construction, and aims to solve the problem that negative pressure occurs in a flood drainage tunnel. The drainage system aeration structure includes: supporting construction, shaft spillway, vent pipe and drainage tunnel, supporting construction is located the stratum, supporting construction has accommodation space, shaft spillway with vent pipe all locates in the accommodation space, vent pipe is used for with drainage tunnel and external intercommunication. The ventilation structure of the drainage system is used for improving the water flow state of the drainage system of the tailing pond.

Description

Ventilation structure of drainage system

Technical Field

The utility model relates to the technical field of constructional engineering, in particular to a ventilation structure of a drainage system.

Background

The tailing pond is a place which is formed by a dam for intercepting a valley or surrounding land and is used for piling up tailings or other industrial waste residues, and generally comprises a tailing piling system, a tailing dam seepage drainage system, a tailing pond flood interception and drainage system, a tailing pond backwater system and the like.

The flood drainage tunnel and the vertical shaft spillway are important components in a tailing pond flood interception and drainage system, the high-speed water flow in the flood drainage tunnel can form a dragging effect on air in a residual space on the top of the tunnel, most of the air is discharged out of the tunnel along with the water flow except for a small amount of air which is doped into water, a large negative pressure can occur in the tunnel, the excessive negative pressure can influence the aeration and corrosion reduction effect of aeration facilities in the flood drainage tunnel, the possibility of cavitation is increased, the risk of cavitation damage of the flood drainage tunnel bottom plate, side walls and other drainage structures is increased, and engineering safety is endangered.

Disclosure of Invention

The utility model aims to provide a ventilation structure of a drainage system, which is used for improving the flow state of water flow of the drainage system of a tailing pond.

In order to achieve the above object, the present utility model provides the following technical solutions:

a drainage system aeration structure for improving the flow pattern of water in a tailings pond drainage system, comprising: supporting construction, shaft spillway, vent pipe and drainage tunnel, supporting construction is located the stratum, supporting construction has accommodation space, shaft spillway with vent pipe all locates in the accommodation space, vent pipe is used for with drainage tunnel and external intercommunication.

Further, the ventilation pipeline comprises a first connecting section, a second connecting section and a third connecting section which are sequentially connected, wherein the first connecting section, the second connecting section and the third connecting section are distributed along the depth increasing direction of the stratum; the third connecting section is communicated with the flood discharge tunnel.

Further, the ventilation pipe further comprises a support structure, wherein the support structure is arranged on the upper surface of the stratum; the first connection section is partially located on the surface of the stratum, and the first connection section is arranged on the supporting structure.

Further, an included angle alpha is formed between the extending direction of the first connecting section and the extending direction of the second connecting section, and the included angle alpha is more than or equal to 50 degrees and less than or equal to 70 degrees.

Further, the third connecting section is provided with a first drain pipe and a first filtering piece arranged on the first drain pipe, the first drain pipe is communicated with the third connecting section, and an axial extension line of the first drain pipe is intersected with an axial extension line of the third connecting section.

Further, the inner diameter of the third connecting section gradually increases from one end close to the second connecting section to one end far away from the second connecting section.

Further, the outer circumferences of the first connecting section and the second connecting section are provided with anti-corrosion coatings.

Further, the inlet of the vent pipe is provided with a waterproof cover.

Further, the side wall of the shaft spillway is provided with a plurality of second drain holes, and the axial extension line of each second drain hole is perpendicularly intersected with the axial extension line of the shaft spillway; and a second drain pipe is arranged in the second drain hole, and a second filter element is arranged at one end of the second drain pipe, which is far away from the shaft spillway.

Further, a gap is formed between the shaft spillway and the ventilation pipeline, and concrete is filled in the gap.

Compared with the prior art, in the ventilation structure of the drainage system, the supporting structure is positioned in the ground, the supporting structure is provided with an accommodating space, and the shaft spillway and the ventilation pipeline are both arranged in the accommodating space. And because the vent pipe is communicated with the flood discharge tunnel arranged below the vertical shaft flood spillway, when the vertical shaft flood spillway and the flood discharge tunnel are used for discharging water, the vent pipe is communicated with the outside air, so that the air pressure in the flood discharge channel is the same as the atmospheric pressure, the negative pressure in the flood discharge tunnel is reduced, the stability of the flood discharge tunnel in flood discharge is improved, and the drainage efficiency is improved. In addition, the shaft spillway and the vent pipe are arranged in the accommodating space of the supporting structure, so that shaft holes can be excavated once, then the supporting structure is integrally constructed on the inner wall of the shaft, and then the shaft spillway and the vent pipe are constructed in the accommodating space of the supporting structure, so that the construction difficulty, the construction efficiency and the construction cost are reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of a ventilation structure of a drainage system of a tailing pond;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view at B in FIG. 1;

FIG. 4 is an enlarged view of FIG. 1 at C;

FIG. 5 is a top view of the venting results of the drainage system of the present utility model;

fig. 6 is a schematic structural diagram of the first connecting section and the supporting structure.

Reference numerals:

100-drainage system ventilation structure, 10-shaft spillway, 101-second drainage hole, 102-second drain pipe, 103-second filter, 11-supporting structure, 12-accommodation space, 20-ventilation pipeline, 21-first linkage segment, 22-second linkage segment, 23-third linkage segment, 231-first drain pipe, 232-first filter, 24-sealing layer, 30-flood discharge tunnel, 40-supporting structure.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The tailing pond is a place which is formed by a dam for intercepting a valley or surrounding land and is used for piling up tailings or other industrial waste residues, and generally comprises a tailing piling system, a tailing dam seepage drainage system, a tailing pond flood interception and drainage system, a tailing pond backwater system and the like.

The flood drainage tunnel and the vertical shaft spillway are important components in a tailing pond flood interception and drainage system, the high-speed water flow in the flood drainage tunnel can form a dragging effect on air in a residual space on the top of the tunnel, most of the air is discharged out of the tunnel along with the water flow except for a small amount of air which is doped into water, a large negative pressure can occur in the tunnel, the excessive negative pressure can influence the aeration and corrosion reduction effect of aeration facilities in the flood drainage tunnel, the possibility of cavitation is increased, the risk of cavitation damage of the flood drainage tunnel bottom plate, side walls and other drainage structures is increased, and engineering safety is endangered.

Referring to fig. 1, an aeration structure of a drainage system according to an embodiment of the present utility model is configured to improve a water flow state of a drainage system of a tailing pond, and includes: supporting construction, shaft spillway, vent pipe and drainage tunnel, supporting construction is located the stratum, supporting construction has accommodation space, shaft spillway with vent pipe all locates in the accommodation space, vent pipe is used for with drainage tunnel and external intercommunication. The vertical shaft spillway is a water inlet structure of a drainage system; the present utility model is described by taking a tailing pond as an example, and of course, the drainage system ventilation structure 100 in the present application can also be used in other scenes such as water conservancy and hydropower.

During construction, construction roads are required to be built firstly, a site is leveled, then a vertical shaft is cut at a proper position of a tailing pond, supporting structures 11 are arranged on two sides of the vertical shaft after the vertical shaft is cut so as to strengthen the side wall of the vertical shaft, the supporting property of the side wall of the vertical shaft spillway 10 is improved, and the situation that the vertical shaft spillway 10 collapses or soil on the side wall falls in the subsequent construction process is avoided; the supporting structure 11 is a supporting structure 11 formed by reinforced concrete; the shaft forms a receiving space 12 in its interior after the support structure 11 has been cut.

The bottom of the vertical shaft is provided with a flood discharge tunnel 30, the flood discharge tunnel 30 is communicated with the vertical shaft spillway 10, an axial extension line of the flood discharge tunnel 30 is intersected with an axial extension line of the vertical shaft spillway 10, and the flood discharge tunnel 30 is used for discharging water in a tailing pond.

The accommodating space 12 is internally provided with the vertical shaft spillway 10 and the ventilation pipeline 20, so that the supporting structure 11 is utilized to simultaneously stabilize the vertical shaft spillway 10 and the ventilation pipeline 20, the ventilation pipeline 20 is tightly attached to the side wall of the vertical shaft, and is arranged on the right side of the vertical shaft spillway 10 as shown in fig. 1 in the application, the ventilation pipeline 20 is communicated with the flood discharge tunnel 30, so that the air pressure in the flood discharge tunnel is the same as the atmospheric air pressure, and negative pressure is avoided in the flood discharge tunnel 30 in the drainage process; when negative pressure is generated in the tunnel, the stability of water flow is influenced, and particularly the phenomena of fluctuation, turbulence, alternation of full flow and the like of the water flow in the flood discharge tunnel 30 can occur, so that the interior of the tailing pond is washed and corroded, the interior of the flood discharge tunnel is cavitated, and a drainage system becomes more dangerous; when the vent pipe 20 is communicated with the flood discharge tunnel 30 arranged below the shaft spillway 10, the vent pipe 20 is communicated with the outside when the flood discharge channel is discharging water, so that the air pressure in the flood discharge channel is the same as the atmospheric pressure, negative pressure in the flood discharge tunnel 30 is reduced, the water flow stability of the flood discharge tunnel 30 during flood discharge is improved, and the drainage efficiency is further improved.

In addition, the shaft spillway 10 and the ventilation pipeline 20 are arranged in the accommodating space 12 of the supporting structure 11, so that shaft holes can be excavated once, then the supporting structure 11 is integrally constructed on the inner wall of the shaft, and then the spillway and the ventilation pipeline 20 are constructed in the accommodating space 12 of the supporting structure 11, thereby reducing construction difficulty, construction efficiency and construction cost.

In some embodiments, referring to fig. 1 to 4, the ventilation pipeline 20 includes a first connection section 21, a second connection section 22, and a third connection section 23 connected in sequence, the first connection section 21, the second connection section 22, and the third connection section 23 being distributed along a depth increasing direction of the stratum, the third connection section 23 being in communication with the flood discharge tunnel 30.

It will be appreciated that the first connecting section 21, the second connecting section 22 and the third connecting section 23 are prefabricated pipes, which can be customized according to the construction requirements before construction, and are directly assembled in the excavation shaft during construction. When the ventilation pipeline 20 is formed by adopting the prefabricated pipe, the ventilation pipeline 20 does not need to be specially constructed in a shaft hole, and the prefabricated pipe which is formed is directly placed in the ventilation pipeline to serve as a ventilation channel, so that the construction cost of the prefabricated pipe can be reduced, the construction period can be shortened, and the construction efficiency in construction is further improved; the first connecting section 21 and the third connecting section 23 in the ventilation pipeline 20 are both arranged in the surface or underground space near one side of the shaft spillway 10, and the second connecting section 22 is arranged in the shaft spillway 10, so that the construction work amount required to be excavated in the construction process can be reduced, the construction period is shortened, and the construction efficiency is improved.

It should be noted that the joints of the first connecting section 21, the second connecting section 22 and the third connecting section 23 need to be sealed, and a socket-and-spigot type or a tongue-and-groove type interface can be adopted to seal the joint.

In some embodiments, referring to fig. 6, the first connection section 21 is partially located above the ground of the stratum, and the drainage system aeration structure 100 further comprises a support structure 40, wherein the support structure 40 is disposed on the ground, and the portion of the first connection section 21 located above the ground is disposed on the support structure 40.

When the first connecting section 21 is disposed on the ground, the support structure 40 is disposed on the ground, and the first connecting section 21 is fixed on the ground by the support structure 40 to limit the movement of the first connecting section 21, so as to avoid the displacement of the first connecting section 21 and improve the stability of the first connecting section 21.

Alternatively, the support structure 40 may be one, and when the support structure 40 is one, the support structure 40 is disposed along the length direction of the first connecting section 21; of course, there may be a plurality of support structures 40, and when there are a plurality of support structures 40, they may be distributed at intervals along the extending direction of the first connecting section 21, and the support structures 40 may be concrete support structures 40 such as concrete mats, prefabricated concrete piers, etc. that are cast-in-place. For example: for the first connection section 21, it is located on the ground, and may be a prefabricated circular culvert, and the prefabricated circular culvert is supported by a concrete cushion layer, so that the prefabricated circular culvert can better adapt to the ground topography fluctuation.

In some embodiments, the extending direction of the first connecting section 21 forms an angle α with the extending direction of the second connecting section 22, and α is 50 ° or less and 70 °. The first connecting section 21 and the second connecting section 22 have an included angle, that is, the ventilation pipeline 20 is a bent pipeline; the vent pipe 20 (the second section of the vent pipe 20) shares a part of structure with the spillway to reduce the construction work amount of the vent pipe 20 during construction, then through setting up the contained angle between the first connecting section 21 and the second connecting section 22, the first connecting section 21 and the shaft spillway 10 share a part of structure and then are far away from the shaft spillway 10, the structure inside the shaft spillway 10 is not influenced, meanwhile, the shaft spillway 10 is not influenced by the vent pipe 20, and the opening of the shaft spillway 10 is also far away from the pipe orifice of the third connecting section 23, so that the influence of the shaft spillway 10 on the exhaust effect of the exhaust pipe is reduced, the air flow at the inlet end of the vent pipe 20 is in a stable state, the negative pressure can not be generated inside the flood discharge tunnel 30 during drainage, the construction work amount is reduced, and the construction efficiency is improved.

Specifically, the included angle α may be any one of 50 °, 55 °, 60 °, 65 °, and 70 °, when α is too large, the third connecting section 23 is almost parallel to the shaft spillway 10, and when it is parallel, the stability of the structure of the shaft spillway 10 may be affected; when α is too small, its structural perpendicularity with the shaft spillway 10 is high, which increases the difficulty of construction of the exhaust duct in construction. Optionally, the above included angle α is preferably 60 ° in the present application, so as to ensure that the construction work amount of the exhaust pipe is reduced as much as possible without affecting the structure of the shaft spillway 10.

In some embodiments, the third connecting section 23 has a first drain pipe 231 and a first filter 232 disposed on the first drain pipe 231, the first drain pipe 231 is communicated with the third connecting section 23, an axial extension line of the first drain pipe 231 intersects with an axial extension line of the third connecting section 23, and the purpose of the first drain pipe 231 is to drain groundwater in surrounding rock around the ventilation pipeline lining into the ventilation pipeline through the first drain pipe 231 and out of the tailing pond through the flood discharge tunnel 30, so as to reduce external water pressure of the ventilation pipeline lining and reduce structural safety hazards; specifically, the first filter 232 may be a water filter, a screen, or a geotextile or a nonwoven filter cloth.

In some embodiments, the inner diameter of the third connecting section 23 increases gradually from an end closer to the second connecting section 22 to an end farther from the second connecting section 22.

It can be appreciated that the inner diameter of the end close to the flood discharge tunnel 30 is larger than the inner diameter of the end far from the flood discharge tunnel 30, so that the construction difficulty in constructing the third connecting section 23 can be reduced; meanwhile, the larger end close to the flood discharge tunnel 30 is beneficial to enabling external air flow to enter the flood discharge tunnel 30 through the third connecting section 23 more quickly, so that water flow of the flood discharge tunnel 30 in the water discharge process is more stable.

For example, the third connecting section 23 adopts a circular cross-section roadway structure with an inner diameter of 1.5m, and is provided with a gradual change section with a length of 3m at the tail end (namely, a side close to the flood discharge tunnel 30), the cross section is reduced from the inner diameter of 1.5m to 0.8m, and the third connecting section 23 is provided with a reinforced concrete lining.

In some embodiments, the outer perimeter of the first and second connection sections 21, 22 is provided with a corrosion resistant coating 24. The anti-corrosion coating 24 may be an asphalt layer, an epoxy resin layer, or other products capable of sealing to realize corrosion protection, and the anti-corrosion coating 24 can reduce or prevent the first connection section 21 and the second connection section 22 from being damaged by water, so as to prolong the service life of the ventilation pipeline 20.

In some embodiments, the inlet of the vent conduit 20 has a waterproof cover. The waterproof cover is used for blocking impurities or rainwater from entering the ventilation pipeline 20 to influence the ventilation effect of the ventilation pipeline 20 and the normal use of the ventilation pipeline 20.

The first connecting section 21 and the second connecting section 22 are C25 reinforced concrete prefabricated circular pipes with the inner diameter of 800mm, and the wall thickness of the circular pipes is 0.2m.

In some embodiments, referring to fig. 5, a plurality of second drain holes 101 are provided on a side wall of the shaft spillway 10, an axial extension line of the second drain holes 101 perpendicularly intersects with an axial extension line of the shaft spillway 10, a second drain pipe 102 is provided in the second drain hole 101, and a second filter 103 is provided at an end of the second drain pipe 102 away from the shaft spillway 10.

It can be understood that the second drainage holes 101 disposed at two sides of the shaft spillway 10 are also used for draining stratum groundwater and reducing the external water pressure of the lining structure, the second drainage holes 101 penetrate through the side wall of the supporting structure 11, and the second drainage pipes 102 are disposed in the drainage holes, and the stratum groundwater is drained into the shaft spillway 10 by disposing the drainage pipes, and the shaft spillway 10 is communicated with the flood discharge tunnel 30, so that the drained groundwater flows through the shaft spillway 10 and then enters the flood discharge tunnel 30 to be discharged; meanwhile, the second drain hole 101 may be disposed at an angle b (the angle range may be 20 ° -70 °) with respect to the shaft spillway 10, where the disposed angle is required to facilitate drainage of groundwater around the lining of the shaft spillway 10.

The second drain pipe 102 extends into surrounding rock at the periphery of the lining and is provided with a second filtering piece 103, and the second filtering piece 103 is used for blocking impurities in the tailing pond and avoiding the impurities from entering the second drain pipe 102 to cause the blockage of the second drain pipe 102; alternatively, the second filter 103 may be a screen or geotextile or nonwoven filter cloth.

In some embodiments, there is a void between the shaft spillway 10 and the vent conduit 20, with the void filled with concrete.

It can be appreciated that after the vent pipe 20 is disposed in the shaft spillway 10, a gap is formed between the vent pipe 20 and the shaft spillway 10, and concrete is injected into the gap to connect the shaft spillway 10 and the vent pipe 20 into a whole, so as to improve the overall stability of the shaft spillway 10 and the vent pipe 20.

In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A drainage system aeration structure for improving the flow pattern of water in a drainage system of a tailings pond, comprising: supporting construction, shaft spillway, vent pipe and drainage tunnel, supporting construction is located the stratum, supporting construction has accommodation space, shaft spillway with vent pipe all locates in the accommodation space, vent pipe is used for with drainage tunnel and external intercommunication.

2. The drainage system aeration structure of claim 1 wherein said aeration conduit comprises a first connection section, a second connection section, and a third connection section connected in sequence, said first connection section, said second connection section, and said third connection section being distributed along a depth increasing direction of said formation; the third connecting section is communicated with the flood discharge tunnel.

3. The drainage system aeration structure of claim 2 wherein said aeration conduit further comprises a support structure, said support structure being disposed on an upper surface of said formation; the first connection section is partially located on the surface of the stratum, and the first connection section is arranged on the supporting structure.

4. A drainage system aeration structure according to claim 3 wherein the direction of extension of said first connection section forms an angle α with the direction of extension of said second connection section of 50 ° - α -70 °.

5. The drain system breather structure of claim 2, wherein the third connection section has a first drain pipe and a first filter provided on the first drain pipe, the first drain pipe communicates with the third connection section, and an axial extension of the first drain pipe intersects an axial extension of the third connection section.

6. A drainage system aeration structure according to claim 3 wherein the inner diameter of said third connecting section increases progressively from an end proximal to said second connecting section to an end distal to said second connecting section.

7. The drain system venting structure of claim 2, wherein the outer perimeter of the first and second connection sections is provided with a corrosion resistant coating.

8. The drain vent structure of claim 4, wherein the inlet of the vent conduit has a waterproof cover.

9. The drainage system ventilation structure of claim 4, wherein the side wall of the shaft spillway is provided with a plurality of second drain holes, and the axial extension line of the second drain holes perpendicularly intersects with the axial extension line of the shaft spillway; and a second drain pipe is arranged in the second drain hole, and a second filter element is arranged at one end of the second drain pipe, which is far away from the shaft spillway.

10. The drainage system aeration structure of claim 1 wherein a void is provided between the shaft spillway and the aeration conduit, the void being filled with concrete.