CN109356097B - A drainage tunnel import structure for ditch water treatment - Google Patents
A drainage tunnel import structure for ditch water treatment Download PDFInfo
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- CN109356097B CN109356097B CN201811443958.2A CN201811443958A CN109356097B CN 109356097 B CN109356097 B CN 109356097B CN 201811443958 A CN201811443958 A CN 201811443958A CN 109356097 B CN109356097 B CN 109356097B
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- canal
- drainage tunnel
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- channel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
The invention relates to a drainage tunnel inlet structure for ditch water treatment, and belongs to the technical field of ditch water treatment engineering in hydraulic and hydroelectric engineering. The invention comprises a natural channel, wherein a drainage tunnel communicated with the natural channel is arranged on one side of the natural channel, an inlet channel is arranged at the inlet end of the drainage tunnel, the inlet channel comprises an upstream channel section and a channel contraction section, and the tail end of the upstream channel section is connected with the inlet end of the drainage tunnel through the channel contraction section; one side wall of the inlet approach channel is arranged along the river shoreline of the natural channel, and the other side wall transversely passes through the natural channel and extends to the opposite side, so that the bottom slope of the upstream section of the approach channel is smoothly connected with the natural channel positioned at the upstream of the drainage tunnel; the part of the side wall of the inlet canal crossing the natural canal is set as a canal side wall of the river block, and the canal side wall of the river block is provided with a water retaining structure. The invention can reduce the height of the inlet hole body of the drainage tunnel, reduce the water retaining height of the downstream river bed and save the investment.
Description
Technical Field
The invention relates to a drainage tunnel inlet structure for ditch water treatment, and belongs to the technical field of ditch water treatment engineering in hydraulic and hydroelectric engineering.
Background
When a large building is built in a high mountain gorge region, a large amount of waste slag needs to be stored, the available space is limited in the high mountain gorge region, the waste slag needs to be stored on a small river channel or a small channel, and the occupied river channel or the small channel generally has water flow, so that ditch water treatment is needed when the waste slag is stored. Typical ditch water treatments include retaining dams for water retaining buildings and drainage tunnels for water draining buildings, as shown in FIG. 1. The drainage tunnel is generally designed according to open flow, and the drainage capacity is calculated through weir flow formulas (1) and (2).
Wherein: q- -tunnel overcurrent flow (m) 3 S); m- -flow coefficient; b- -the bottom width of the water section (m); g- -gravity acceleration (m/s) 2 )；H 1 -the depth of water (m) above the tunnel inlet bottom; v 1 Is the travelling flow rate (m/s); h 0 -a tunnel inlet head (m) taking into account the travelling flow velocity head.
The traditional design method is that the retaining dam is used for retaining the channel water flow and the water level is high, so that the drainage tunnel meets the design drainage capacity. Due to the traditional inlet design mode, the flow speed of inlet water flow in front of a dam is reduced, and the flow speed of the original river channel can not be fully utilized to increase the drainage capacity of a drainage hole. Therefore, the water depth of the inlet section is large, the water retaining dam is high in the traditional method, and the height of the entrance section of the drainage tunnel is high.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the inlet structure of the drainage tunnel for ditch water treatment is used for reducing the water retaining height of a downstream river bed, reducing the height of the inlet hole of the drainage tunnel and saving investment.
The technical scheme adopted by the invention for solving the technical problems is as follows: the drainage tunnel inlet structure for ditch water treatment comprises a natural ditch, wherein a drainage tunnel communicated with the natural ditch is arranged on one side of the natural ditch, an inlet guide ditch is arranged at the inlet end of the drainage tunnel, the inlet guide ditch comprises an upstream guide ditch section and a guide ditch contraction section, and the tail end of the upstream guide ditch section is connected with the inlet end of the drainage tunnel through the guide ditch contraction section; one side wall of the inlet approach channel is arranged along the river shoreline of the natural channel, and the other side wall transversely passes through the natural channel and extends to the opposite side, so that the bottom slope of the upstream section of the approach channel is smoothly connected with the natural channel positioned at the upstream of the drainage tunnel; the part of the side wall of the inlet canal crossing the natural canal is set as a canal side wall of the river block, and the canal side wall of the river block is provided with a water retaining structure.
Further is: the water retaining structure can adopt one of the following two modes, and the earth and stone water retaining dam is arranged on the downstream side of the side wall of the approach canal of the river block to serve as the water retaining structure; or, the body of the river-blocking section approach canal side wall adopts a concrete gravity type water retaining structure.
Further is: the whole inlet canal adopts a concrete structure.
Further is: the inlet end of the drainage tunnel is arranged on the concave bank of the natural channel.
Further is: the bottom slope of the inlet canal is reduced more than the bottom slope of the natural canal.
Further is: the bottom of drainage tunnel is equipped with the intermediate wall along drainage tunnel length direction for the drainage tunnel forms two water channels, and the entrance point of drainage tunnel is provided with the lock chamber, is provided with the twice gate in the lock chamber, gate and water channel one-to-one.
The beneficial effects of the invention are as follows: by smoothly extending the conventional approach channel to the upstream natural channel and arranging the conventional water-retaining dam in combination with the approach channel, the advancing flow velocity V of the inlet can be increased 1 Reducing the water depth H above the bottom of the tunnel inlet 1 The water retaining height of the downstream riverbed and the height of the inlet hole of the drainage tunnel are effectively reduced, a water retaining dam is not additionally built, and the investment is saved.
Drawings
FIG. 1 is a prior art floor plan;
FIG. 2 is a plan view of the present invention;
FIG. 3 is a floor plan of the present invention;
FIG. 4 is a schematic view of the cross-sectional view of the embodiment A-A of FIG. 2;
FIG. 5 is a schematic diagram of a cross-sectional view of the embodiment A-A of FIG. 2;
fig. 6 is a schematic view of section B-B of fig. 3.
The parts in the figure are marked: 1-natural channel, 2-drainage tunnel, 3-inlet canal, 31-canal upstream section, 32-canal contraction section, 33-canal side wall, 4-middle wall, 5-gate chamber, 6-gate, 7-earth-rock retaining dam and 8-ground line.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 2 to 6, the invention comprises a natural channel 1, a drainage tunnel 2 communicated with the natural channel 1 is arranged on one side of the natural channel 1, an inlet canal 3 is arranged at the inlet end of the drainage tunnel 2, the inlet canal 3 comprises an canal upstream section 31 and an canal contraction section 32, and the tail end of the canal upstream section 31 is connected with the inlet end of the drainage tunnel 2 through the canal contraction section 32; one side wall of the inlet canal 3 is arranged along the river shoreline of the natural canal 1, and the other side wall transversely passes through the natural canal 1 and extends to the opposite side, so that the bottom slope of the canal upstream section 31 is smoothly connected with the natural canal 1 positioned upstream of the drainage tunnel 2; the partial side wall of the inlet canal 3 crossing the natural canal 1 is set as a river-block canal side wall 33, and the river-block canal side wall 33 is provided with a water blocking structure.
The invention adopts the inlet canal 3 to smoothly extend to the upstream side of the natural canal 1 on the basis of the traditional canal, the bottom slope of the canal is connected with the natural canal 1, a canal contraction section 32 is arranged at the inlet of the drainage tunnel 2, and water flow with a certain advancing flow rate is stably led into the drainage tunnel 2. According to the invention, water flow of the natural channel 1 can smoothly enter the drainage tunnel 2 through the extended canal, the water flow speed head loss of the natural channel 1 is reduced, and the inlet travelling flow speed of the drainage tunnel 2 is increased.
The bottom slope of the natural channel 1 is reduced to i 0 The bottom slope of the inlet canal 3 is reduced to i 1 The bottom slope of the drainage tunnel 2 is reduced to i 2 . To further increase the travelling flow velocity V 1 Reducing the water depth H above the bottom of the tunnel inlet 1 Bottom slope of inlet canal 3 falls by i 1 Preferably lower i than the bottom slope of the natural channel 1 0 Large; at the same time, in order to reduce the roughness of the approach channel and improve the water flow scouring resistance of the approach channel, the inlet approach channel 3 can be integrally formed by adopting concrete knotsConstructing a structure. Under the guidance of the inlet canal 3 with large gradient and low roughness, the flow speed of the natural channel 1 is further increased under the action of gravity, so that the drainage tunnel 2 obtains a larger advancing flow speed V 1 Reduce the water depth H above the bottom of the tunnel inlet 1 . Therefore, the hole height of the inlet section of the drainage tunnel 2 and the water blocking height along the river side can be reduced.
The side wall of the inlet canal 3 can adopt a slope-attached concrete structure or a gravity retaining wall structure according to actual topography and geological conditions. As shown in fig. 4, when the side wall 33 of the canal for the river block is of a slope-attached concrete structure, the side wall 33 of the canal for the river block is provided with a soil and stone retaining dam 7 on the downstream side as a water retaining structure, and the slopes on the two sides of the soil and stone retaining dam 7 are required to be stable. In addition, as shown in fig. 5, if the body of the canal approach side wall 33 adopts a concrete gravity type water retaining structure, the body is only required to be connected with a concrete bottom plate, and the concrete gravity type water retaining structure is required to meet the stability requirement.
The inlet end of the drainage tunnel 2 is preferably arranged on the concave side of the natural channel 1, so that the flow state of water flowing into the drainage tunnel 2 can be regulated.
The water stop treatment is needed at the interconnection part among the inlet canal 3, the drainage tunnel 2 and the concrete gravity type water retaining structure.
If the natural channel 1 has more bed load, the bottom of the drainage tunnel 2 can be provided with the intermediate wall 4 along the length direction of the drainage tunnel 2, so that the drainage tunnel 2 forms two water passing channels, the inlet end of the drainage tunnel 2 is provided with a sluice chamber 5, two sluice gates 6 are arranged in the sluice chamber 5, and the sluice gates 6 correspond to the water passing channels one by one. And when the flow rate is low, one gate 6 can be arranged, single-side overflow can be realized, and the single-side drainage tunnels 2 can be overhauled in turn.
In practical implementation, as the flow of the natural channel 1 occupied by the slag pile is generally smaller, cofferdam can be arranged in a dead period for direct construction, and if necessary, the flow is guided by adopting culverts and other modes.
Claims (7)
1. A drainage tunnel inlet structure for ditch water treatment, including natural channel (1), drainage tunnel (2) that communicate natural channel (1) are arranged to one side of natural channel (1), and the entrance point of drainage tunnel (2) is provided with import canal (3), its characterized in that: the inlet canal (3) comprises a canal upstream section (31) and a canal contraction section (32), and the tail end of the canal upstream section (31) is connected with the inlet end of the drainage tunnel (2) through the canal contraction section (32);
one side wall of the inlet canal (3) is arranged along the river shoreline of the natural canal (1), and the other side wall transversely passes through the natural canal (1) to extend to the opposite side, so that the bottom slope of the upstream section (31) of the canal is smoothly connected with the natural canal (1) positioned at the upstream of the drainage tunnel (2);
the part of the side wall of the inlet canal (3) crossing the natural canal (1) is set as a canal side wall (33) of the river block, and the canal side wall (33) of the river block is provided with a water blocking structure.
2. The drainage tunnel inlet structure for ditch water treatment of claim 1, wherein: the guide canal side wall (33) of the river reach is provided with a soil and stone retaining dam (7) at the downstream side as a water retaining structure.
3. The drainage tunnel inlet structure for ditch water treatment of claim 1, wherein: the body of the guide canal side wall (33) of the river reach adopts a concrete gravity type water retaining structure.
4. The drainage tunnel inlet structure for ditch water treatment of claim 1, wherein: the whole inlet canal (3) adopts a concrete structure.
5. The drainage tunnel inlet structure for ditch water treatment of claim 1, wherein: the inlet end of the drainage tunnel (2) is arranged on the concave bank of the natural channel (1).
6. The drainage tunnel inlet structure for ditch water treatment of claim 1, wherein: the bottom slope of the inlet canal (3) is declined (i) 1 ) Lower slope (i) than the natural channel (1) 0 ) Large.
7. The drainage tunnel inlet structure for ditch water treatment as set forth in any one of claims 1 to 6, wherein: the bottom of drainage tunnel (2) is equipped with intermediate wall (4) along drainage tunnel (2) length direction for drainage tunnel (2) form two water channels, and the entrance point of drainage tunnel (2) is provided with lock chamber (5), is provided with two gates (6) in lock chamber (5), gate (6) and water channel one-to-one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811443958.2A CN109356097B (en) | 2018-11-29 | 2018-11-29 | A drainage tunnel import structure for ditch water treatment |
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|---|---|---|---|
| CN201811443958.2A CN109356097B (en) | 2018-11-29 | 2018-11-29 | A drainage tunnel import structure for ditch water treatment |
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| CN109356097A CN109356097A (en) | 2019-02-19 |
| CN109356097B true CN109356097B (en) | 2023-09-19 |
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| CN201811443958.2A Active CN109356097B (en) | 2018-11-29 | 2018-11-29 | A drainage tunnel import structure for ditch water treatment |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110258476A (en) * | 2019-06-26 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | High-mountain gorge areas power station ditch water process scupper structure |
| WO2021035374A1 (en) * | 2019-08-30 | 2021-03-04 | 钟炽昌 | Water flow dividing technique for accelerating increase of water flow and increasing water flow pressure for sloping water channel of water tower |
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