CN108005038B - Accumulated slag water collecting structure of bottom flow stilling pool - Google Patents
Accumulated slag water collecting structure of bottom flow stilling pool Download PDFInfo
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- CN108005038B CN108005038B CN201711239342.9A CN201711239342A CN108005038B CN 108005038 B CN108005038 B CN 108005038B CN 201711239342 A CN201711239342 A CN 201711239342A CN 108005038 B CN108005038 B CN 108005038B
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- bottom plate
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a slag accumulation and water collection structure of an underflow stilling basin, wherein a slag accumulation drainage ditch is arranged at the junction of a bottom plate and a side wall along the bottom plate, extends from the upstream of the bottom plate to the downstream of the bottom plate, a slag accumulation and water collection pit is arranged at the corner of the junction of the bottom plate and a tail sill, the slag accumulation drainage ditch is communicated with the slag accumulation and water collection pit, and the slag accumulation and water collection pit is communicated with a drainage pump pipe. The invention utilizes the water flow flowing through the underflow stilling basin to push the hard substance slag on the bottom plate to the accumulated slag drainage ditches at two sides, because the density of the hard substance slag is less than that of water, the slag sinking into the accumulated slag drainage ditches is little under the power action of the water flow and can not be carried, the slag slides downstream along the water flow and finally is collected into the accumulated slag catchment pit arranged at the boundary corner of the bottom plate and the tail sill, and the slag collected at the position can be quickly and conveniently cleaned during maintenance; during the maintenance and pumping of the underflow stilling basin, the accumulated water can be conveniently pumped away by utilizing the water collecting effect of the accumulated slag drainage ditches at the two sides.
Description
Technical Field
The invention relates to the field of hydraulic construction engineering, in particular to a slag and water collecting structure of an underflow stilling basin.
Background
At present, a considerable number of hydroelectric and hydro-power engineering and water conservancy and hydropower engineering are built in China, such as the second beach, the brocade screen, the stream ferry, the upward dam, the Laxi tile, the small bay, the official place and the like, most of flood discharge energy dissipation modes adopted by the engineering are trajectory energy dissipation and underflow energy dissipation, most of the flood discharge energy dissipation modes are provided with a water cushion pond or a stilling pond for energy consumption of a discharged water body, and the arranged water cushion pond or stilling pond has the requirements of pumping drainage and maintenance in order to ensure safe operation of flood discharge energy dissipation facilities.
From the pumping inspection of the currently-operated second beach, Xiluodie, big hillock, official place, water-filled pond and stilling pond of a dam-added electric station and the like, the pumping inspection discovers that the residual water in the water-filled pond and the stilling pond is difficult to pump and drain, the maintenance parts need to be enclosed, accumulated water is manually cleaned outside the enclosure, and under the condition that the maintenance period is originally short, the accumulated slag on the bottom plate in the maintenance preparation period consumes longer cleaning time.
The problem that the bottom plate is abraded by hard substances such as reinforcing steel bars, steel pipes, block stones and the like existing in the plunged pool and the stilling pool is discovered from the initial stage of power station investment, unstable block stones can not be prevented from falling into the plunged pool and the stilling pool in the operation period, the hard substances cause certain abrasion damage to the bottom plate of the stilling pool, shallow abrasion causes exposure of aggregates and exposure of reinforcing steel bars, severe abrasion causes damage to local reinforcing mesh, and the depth reaches about 1 m. Statistics on the characteristics of the worn parts shows that the worn parts are mostly arranged at the junction parts of the side walls and the bottom plate, the worn residual bodies are accumulated at the corner positions between the side walls and the bottom plate within 20cm of the lower part of the worn side wall, and the steel bars, the steel pipes and the stone residual bodies are all ground to be smooth in surface.
Through the analysis of the motion flow state model test and prototype test results of the water bodies in the plunge pool and the stilling pool, the tumble of the vertical surface of the water body is formed by the discharge of the trajectory energy dissipation water body into the water cushion, and then the tumble water flows are adjusted at the rear parts of the plunge pool and the stilling pool and then flow into a downstream river channel. Hard substances entering the plunge pool and the stilling pool are mostly positioned near the bottom plate of the stilling pool due to the density of the hard substances is higher than that of a water body, and impact, abrasion and damage are generated on the bottom plate along with the left and right reversal, rolling and jumping of impact water flow.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the accumulated slag catchment structure of the underflow stilling pool can limit impact abrasion damage of hard substances falling into the stilling pool to a bottom plate of the stilling pool, and can be convenient for cleaning accumulated slag catchment of the bottom plate in the later period of maintenance, pumping and drainage.
In order to solve the technical problems, the invention adopts the technical scheme that: the accumulated slag catchment structure comprises side walls arranged on two sides of a bottom plate and a tail sill arranged on the downstream of the bottom plate, wherein an accumulated slag drainage ditch is arranged at the junction of the bottom plate and the side walls along the bottom plate, the accumulated slag drainage ditch extends from the upstream of the bottom plate to the downstream of the bottom plate, an accumulated slag catchment pit is arranged at the junction edge of the bottom plate and the tail sill, the accumulated slag drainage ditch is communicated with the accumulated slag catchment pit, and the accumulated slag catchment pit is communicated with a drainage pump pipe.
Further, the method comprises the following steps: the depth of the starting end of the accumulated slag drainage ditch is 0.5m, and the width of the accumulated slag drainage ditch is 0.4 m.
Further, the method comprises the following steps: the accumulated slag drainage ditch is provided with a slope, and the slope gradually increases from the upstream to the downstream.
Further, the method comprises the following steps: the gradient of the accumulated slag drainage ditch is 1-3 per mill.
Further, the method comprises the following steps: the length of the accumulated slag water collecting pit is 2m, the width of the accumulated slag water collecting pit is 1.5m, and the depth of the accumulated slag water collecting pit is 1.5 m.
The invention has the beneficial effects that: the accumulated slag drainage ditch is arranged at the junction of the bottom plate of the underflow absorption basin and the side walls at two sides, the hard substance slag on the bottom plate is pushed into the accumulated slag drainage ditches at two sides by water flow flowing through the underflow absorption basin, and the hard substance slag sinks into the accumulated slag drainage ditches under the action of the power of the water flow and cannot be carried up any more because the density of the hard substance slag is less than that of water; during the maintenance and pumping period of the underflow stilling pool and the trajectory-deflecting plunge pool, the residual accumulated water can be conveniently pumped away by utilizing the water-collecting function of the accumulated slag drainage ditches at the two sides.
Drawings
FIG. 1 is a floor plan of the present invention;
3 FIG. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 the 3 line 3 A 3- 3 A 3 in 3 FIG. 3 1 3; 3
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
labeled as: 1-bottom plate, 2-side wall, 3-end sill, 4-accumulated slag drainage ditch and 5-accumulated slag water collecting pit.
Detailed Description
In order to facilitate understanding of the invention, the invention is further described below with reference to the accompanying drawings.
The accumulated slag water collecting structure of the underflow stilling pool, disclosed by the invention, comprises side walls 2 arranged at two sides of a bottom plate 1 and a tail sill 3 arranged at the downstream of the bottom plate 1, wherein a accumulated slag drainage ditch 4 is arranged at the junction of the bottom plate 1 and the side walls 2 along the bottom plate 1, the accumulated slag drainage ditch 4 extends from the upstream of the bottom plate 1 to the downstream of the bottom plate 1, an accumulated slag water collecting pit 5 is arranged at the corner of the junction of the bottom plate 1 and the tail sill 3, the accumulated slag drainage ditch 4 is communicated with the accumulated slag water collecting pit 5, and the accumulated slag water collecting pit 5 is communicated with a drainage pump pipe. The invention fully utilizes the water flow flowing through the underflow stilling basin, utilizes the impulsive force generated when the water flow flows from the upstream to the downstream to push the hard substance slag on the bottom plate 1 to two sides, so that the slag is pushed and deposited in the slag accumulating drainage ditch 4 at two sides of the bottom plate 1, then utilizes the flow of the water flow to drive the deposited slag to the downstream, and finally the deposited slag is driven into the slag collecting pit 5 at the junction of the tail sill 3 and the bottom plate 1, the flow velocity of the water flow at the tail sill 3 is small, the impact force of the water flow contacting the bottom is small, the slag cannot be taken out and deposited in the slag collecting pit 5, and the cleaning can be conveniently carried out.
The depth of the initial end of the accumulated slag drainage ditch 4 is 0.5m, and the width of the accumulated slag drainage ditch is 0.4 m.
In order to facilitate the water flow to convey the slag deposited in the slag drainage ditch 4 to the downstream slag catchment pit 5, the slag drainage ditch 4 is provided with a gradient, the gradient is gradually increased from the upstream to the downstream, further, the gradient of the slag drainage ditch 4 is set to be 1-3 per thousand, and as the density of the hard substance slag is greater than that of the water flow, the slag cannot be taken up but can slide to the downstream along the water flow under the action of the water flow until the slag is conveyed to the slag catchment pit 5.
The length of the slag collecting sump 5 is 2m, the width thereof is 1.5m, and the depth thereof is 1.5 m.
The trajectory-deflecting plunge pool and the underflow stilling pool have similar structures, and the invention is also suitable for improving the trajectory-deflecting plunge pool.
Claims (5)
1. The utility model provides a sediment catchment structure of underflow stilling basin, includes that the setting is at side wall (2) of bottom plate (1) both sides and sets up at end sill (3) of bottom plate (1) low reaches, its characterized in that: the utility model discloses a set up long-pending sediment escape canal (4) along bottom plate (1) in the juncture of bottom plate (1) and side wall (2), long-pending sediment escape canal (4) extend to the low reaches department of bottom plate (1) from the upper reaches department of bottom plate (1), set up long-pending sediment trap pit (5) in the juncture edge department of bottom plate (1) and tail sill (3), long-pending sediment escape canal (4) and long-pending sediment trap pit (5) intercommunication, long-pending sediment trap pit (5) intercommunication drainage pump pipe.
2. The accumulated slag water collecting structure of the underflow stilling basin as claimed in claim 1, wherein: the depth of the starting end of the accumulated slag drainage ditch (4) is 0.5m, and the width of the accumulated slag drainage ditch is 0.4 m.
3. The slag and water collecting structure of the underflow stilling basin as claimed in claim 1 or 2, wherein: the accumulated slag drainage ditch (4) is provided with a slope, and the slope gradually increases from the upstream to the downstream.
4. The accumulated slag water collecting structure of the underflow stilling basin as claimed in claim 3, wherein: the gradient of the accumulated slag drainage ditch (4) is 1-3 per mill.
5. The accumulated slag water collecting structure of the underflow stilling basin as claimed in claim 1, wherein: the length of the accumulated slag catchment pit (5) is 2m, the width of the accumulated slag catchment pit is 1.5m, and the depth of the accumulated slag catchment pit is 1.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711239342.9A CN108005038B (en) | 2017-11-30 | 2017-11-30 | Accumulated slag water collecting structure of bottom flow stilling pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711239342.9A CN108005038B (en) | 2017-11-30 | 2017-11-30 | Accumulated slag water collecting structure of bottom flow stilling pool |
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| Publication Number | Publication Date |
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| CN108005038A CN108005038A (en) | 2018-05-08 |
| CN108005038B true CN108005038B (en) | 2020-05-19 |
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| CN110700206A (en) * | 2019-09-23 | 2020-01-17 | 中国电建集团华东勘测设计研究院有限公司 | Overhauling system and implementation method of large-water-depth scoop type stilling pool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6059490A (en) * | 1998-05-05 | 2000-05-09 | Kauppi; Frederick J. | Hydraulic energy dissipating offset stepped spillway and methods of constructing and using the same |
| AU2002219143A1 (en) * | 2000-12-05 | 2002-06-18 | Hans Huber Ag Maschinen- Und Anlagenbau | Device for separating and removing separation materials from a flowing liquid |
| CN100366827C (en) * | 2006-03-22 | 2008-02-06 | 天津大学 | Hydraulic self-controlling water drainage structure of bottom plate of stilling pond |
| CN201526037U (en) * | 2009-10-19 | 2010-07-14 | 中国水电顾问集团华东勘测设计研究院 | Wide tail pier falling-sill bottom-flow energy dissipation structure |
| CN201560489U (en) * | 2009-12-09 | 2010-08-25 | 贵阳铝镁设计研究院 | Drainage ditch with large gradient |
| CN203080490U (en) * | 2012-12-20 | 2013-07-24 | 中国水电顾问集团华东勘测设计研究院 | Structure of overflow dam type draining tank in waste slag area |
| CN103321192B (en) * | 2013-07-11 | 2015-05-13 | 安徽理工大学 | Ski-jump and jet flow combined energy dissipation device |
| CN103498451B (en) * | 2013-09-26 | 2015-12-23 | 中国长江三峡集团公司 | Impact type combination underflow energy dissipator structure |
| CN204282315U (en) * | 2014-11-25 | 2015-04-22 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of absorption basin discharge structure |
| CN104674773A (en) * | 2015-02-13 | 2015-06-03 | 水利部交通运输部国家能源局南京水利科学研究院 | Rectification energy dissipation method for inverse step stilling basin and stilling basin |
| CN104863098B (en) * | 2015-05-14 | 2017-01-11 | 广东省水利水电科学研究院 | Danger-elimination refitting method for stilling pool downstream energy dissipater |
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