CN110700206A - Overhauling system and implementation method of large-water-depth scoop type stilling pool - Google Patents
Overhauling system and implementation method of large-water-depth scoop type stilling pool Download PDFInfo
- Publication number
- CN110700206A CN110700206A CN201910897107.3A CN201910897107A CN110700206A CN 110700206 A CN110700206 A CN 110700206A CN 201910897107 A CN201910897107 A CN 201910897107A CN 110700206 A CN110700206 A CN 110700206A
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- water
- cofferdam
- dam
- overhaul
- scoop
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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
-
- 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
Abstract
The invention belongs to the technical field of water conservancy and hydropower, and particularly relates to an overhauling system and an implementing method of a large-water-depth bucket type absorption basin. Compared with the prior art, the permanent drainage system and the maintenance cofferdam core wall structure are arranged, the top elevation of the maintenance cofferdam core wall is slightly higher than the lowest downstream tail water level plus the wave climbing height, and temporary cofferdam filling is omitted; the overhaul cofferdam core wall is positioned at the tail end of the downstream of the apron and is far away from the flood discharge and energy dissipation main flow area, and the structural style of protecting rock masses on two sides of the concrete overhaul cofferdam core wall is adopted, so that the reliability and the durability are better; seepage-proofing and water-stopping materials are respectively arranged between two ends of the overhaul cofferdam core wall and the rock slope and between the guide walls of the plant and the dam, and an seepage-proofing curtain is arranged on the overhaul cofferdam core wall foundation, so that the seepage-proofing effect is good; and a pumping and drainage system is arranged in the sand flushing bottom hole dam section and comprises an overhaul water collecting well, a water collecting well pump room and an embedded pipe for communicating a bucket pool, a water body in the apron and the water collecting well, so that the arrangement and the disassembly of temporary pumping and drainage equipment are avoided.
Description
Technical Field
The invention belongs to the technical field of water conservancy and hydropower, and particularly relates to an overhauling system and an implementing method of a large-water-depth bucket type absorption basin.
Background
For the hydropower station with the barrage being a concrete gravity dam and the factory building being a dam-behind type, the overflow dam section is generally arranged on one side of the riverbed, the other side of the riverbed is a power generation factory building dam section, and the middle of the overflow dam section is provided with a sand flushing bottom hole dam section and a guide wall between the factory dams. When flood discharge energy dissipation building adopts the scoop type stilling pool, in order to guarantee the energy dissipation effect of the scoop type stilling pool, the water depth of the downstream is generally larger, even in the dry period, under the lowest water level condition of the downstream, the scoop type stilling pool is submerged under water, when the scoop type stilling pool needs to be overhauled, the common way is: (1) closing the gates of the overflow surface holes and the sand flushing bottom holes in the dry season, and stopping the water flow of the flood discharge building; (2) a temporary earth-rock cofferdam is filled at a proper position downstream of the scoop type stilling pool and is used for temporarily retaining water during maintenance; (3) water pumps are temporarily arranged in the scoop type stilling pool and the temporary cofferdam for pumping and draining water until the scoop type stilling pool is exposed out of the water surface; (4) during the inspection, a factory building unit is used for generating and discharging water flow, so that one side of the scoop type stilling pool is constructed in a dry land; (5) and (4) inspecting or repairing the scoop type absorption basin, completing the maintenance, dismantling the water part of the temporary cofferdam, opening an overflow meter hole gate, and recovering the submerging state of the scoop type absorption basin. In order to ensure that the scoop type absorption basin is in a dry land construction condition during inspection or maintenance, the work of filling, closing air, pumping and draining water of a foundation pit, maintaining the absorption basin, removing the cofferdam and the like of a downstream temporary maintenance cofferdam must be completed in a dry water period, and the number of working procedures is large. For the scoop type stilling pool, because the downstream water depth is larger, the filling amount of the temporary cofferdam is generally larger, the construction speed is slow, and the anti-seepage and air-blocking effects are difficult to ensure in underwater filling; the water in the stilling pool is large, the required power of the water pump is large, the arrangement of a temporary cable and a water pumping and draining pump is difficult, and the installation and the removal take long time; the overhaul cofferdam is temporary engineering, can be broken down when discharging flood, still need fill again when overhauing next time, wastes time and energy and costs money, becomes several difficult points that the scoop type stilling pool overhauld above.
In order to avoid filling a temporary cofferdam, a movable flap gate is arranged at a flat protection position, the flap gate is folded at ordinary times, and the flap gate is unfolded when water is required to be retained. However, when the downstream water depth and the width of the bucket are large, the size of one flap gate cannot be too large, a structural pier needs to be arranged on the apron to support the flap gate, the flap gate is washed by water flow during normal operation flood discharge, the structural pier and the flap gate are easy to damage and deform, the reliability is poor, in addition, the metal structure of the flap gate is underwater for a long time, certain difficulty exists in self maintenance, and the flap gate cannot be normally used once the flap gate fails.
Disclosure of Invention
The first purpose of the invention is to provide a maintenance system of a large-water deep-scoop type stilling pool, aiming at the defects in the prior art.
For this reason, the above object of the present invention is achieved by the following technical solutions:
the overhaul system of the large-water-depth scoop type stilling pool is characterized by comprising an overflow dam section dam body, wherein the downstream of the overflow dam section dam body is the scoop type stilling pool, the tail part of the scoop type stilling pool is provided with a scoop type stilling pool tail bank, the downstream of the scoop type stilling pool is provided with a apron, the tail part of the apron is provided with an overhaul cofferdam core wall, and the top elevation of the overhaul cofferdam core wall is slightly higher than the lowest tail water level of the downstream; the utility model discloses a river bed dam for building dam, including overflow dam section dam body, factory building dam section, sand washing bottom hole dam section, pumping drainage system, stilt, drainage system, factory building tail canal, factory building dam section, be equipped with sand washing bottom hole dam section between overflow dam section dam body and the factory building dam section, be equipped with pumping drainage system in the sand washing bottom hole dam section, pumping drainage system and stilt are linked together respectively in order to draw water from in stilt basin and the stilt, pumping drainage system still is linked together with factory building tail canal in order to go into factory building tail canal with the water that comes from in stilt basin and the stilt, be equipped with between factory building tail canal and the stilt and lead the wall in order to separate factory building tail canal and stilt between factory building dam.
While adopting the technical scheme, the invention can also adopt or combine the following technical scheme:
according to a preferable technical scheme of the invention, the drainage system comprises an overhaul water collecting well, a first embedded pipe and a second embedded pipe are arranged on the side surface of the overhaul water collecting well, the first embedded pipe is used for communicating the overhaul water collecting well with a stilling bucket, the second embedded pipe is used for communicating the overhaul water collecting well with a apron, a water collecting well pump room is arranged above the overhaul water collecting well, and a plurality of water pumps are arranged in the water collecting well pump room.
As a preferred technical scheme of the invention, a side wall of the stilling pool is arranged at one side of the stilling pool close to the bank slope, and the side edge of the stilling pool is a rocky side slope at the downstream of the side wall of the stilling pool.
As a preferred technical scheme of the invention, the connection part of the rock slope and the overhaul cofferdam core wall is provided with an anti-seepage water-stop material, and the connection part of the overhaul cofferdam core wall and the guide wall between the plant dams is also provided with the anti-seepage water-stop material.
As the preferable technical scheme of the invention, the bottom of the core wall of the overhaul cofferdam is provided with an impermeable curtain.
As the preferable technical scheme of the invention, rockfill bodies with certain slopes are arranged on two sides of the overhaul cofferdam core wall.
As the preferred technical scheme of the invention, the drainage system and the overhaul cofferdam core wall are both permanent structures.
The second purpose of the present invention is to provide an overhaul implementation method for a large-water-depth bucket type stilling pool overhaul system, which aims at the defects existing in the prior art.
For this reason, the above object of the present invention is achieved by the following technical solutions:
an overhaul implementation method of a large-water-depth scoop type stilling pool overhaul system is characterized in that when the large-water-depth scoop type stilling pool needs to be overhauled, the reduction of the upstream water amount and the reduction of the downstream water level in a dry water period are utilized, and the effective coordination between overhaul cofferdams at the tail parts of a protection platform is realized, only an overflow surface hole gate and a sand flushing bottom hole dam section inner bottom hole gate need to be closed, water in the large-water-depth scoop type stilling pool and the protection platform needs to be drained to an overhaul water collecting well through a first pre-buried pipe and a second pre-buried pipe in the sand flushing bottom hole dam section, and the water in the large-water-depth scoop type stilling pool and the protection platform is pumped to a workshop tail canal by a water pump in a water collecting well pump room, so that a dry construction environment required for overhaul can be formed in the large-water-depth scoop pool and; after the overhaul is finished, the overflow meter hole gate is opened to fill water into the absorption bucket tank, and then the normal operation can be recovered.
The invention provides a maintenance system and an implementation method of a large-water-depth scoop type stilling pool, compared with the prior art, the maintenance system is provided with a permanent drainage system and a maintenance cofferdam core wall structure, the top elevation of the concrete maintenance cofferdam core wall is slightly higher than the lowest downstream tail water level plus the wave climbing height, and the temporary cofferdam filling is avoided; the overhaul cofferdam core wall is positioned at the tail end of the downstream of the apron and is far away from the flood discharge and energy dissipation main flow area, and the structural style of protecting rock masses on two sides of the concrete overhaul cofferdam core wall is adopted, so that the reliability and the durability are better; seepage-proofing and water-stopping materials are respectively arranged between two ends of the overhaul cofferdam core wall and the rock slope and between the guide walls of the plant and the dam, and an seepage-proofing curtain is arranged on the overhaul cofferdam core wall foundation, so that the seepage-proofing effect is good; a pumping drainage system is arranged in the sand flushing bottom hole dam section, and comprises an overhaul water collecting well, a water collecting well pump room and a pre-buried pipe for communicating a bucket pool, a water body in a apron and the water collecting well, so that the arrangement and the removal of temporary pumping drainage equipment are avoided; the overhauling system of the large-water-depth scoop-type absorption basin provided by the invention can quickly pump water in the scoop-type absorption basin, has high reliability and can be repeatedly used, thereby providing sufficient construction period for overhauling of the scoop-type absorption basin and greatly reducing the operation and maintenance cost.
Drawings
FIG. 1 is a plan view of a deep bucket type stilling pool maintenance system provided by the present invention;
FIG. 2 is a schematic view in the direction A-A of FIG. 1;
FIG. 3 is a schematic view in the direction B-B in FIG. 1;
FIG. 4 is a schematic view in the direction C-C of FIG. 1;
in the figure: 1-overflowing a dam body of a dam section; 2-a bucket-elimination pool; 3-stilling pool end ridge; 4-a care agent; 5-overhauling the cofferdam core wall; 6-bucket pool side wall; 7-rock slopes; 8-flushing sand bottom hole dam section; 9-guide wall between the plant dams; 10-a factory building dam section; 11-factory tail canal; 12-a first pre-buried pipe; 13-a second pre-buried pipe; 14-overhauling a water collecting well; 15-sump pump house; 16-rockfill; 17-impervious curtain; 18-water pump.
Detailed Description
The invention is described in further detail with reference to the figures and specific embodiments.
A maintenance system of a large-water-depth scoop-type stilling pool comprises an overflow dam section dam body 1, wherein a stilling pool 2 is arranged at the downstream of the overflow dam section dam body 1, a stilling pool tail bank 3 is arranged at the tail part of the stilling pool 2, a apron 4 is arranged at the downstream of the stilling pool 2, a maintenance cofferdam core wall 5 is arranged at the tail part of the apron 4, and the crest height of the maintenance cofferdam core wall 5 is slightly higher than the lowest tail water level of the downstream; the side of the absorption bucket pool 2 close to the bank slope is provided with an absorption bucket pool side wall 6, the downstream of the absorption bucket pool side wall 6, and the side of the apron 4 close to the bank slope is a rock slope 7; a factory building dam section 10 is arranged on one side of a riverbed of an overflow dam section dam body 1, a factory building tail water channel 11 is arranged on the downstream of the factory building dam section 10, a sand flushing bottom hole dam section 8 is arranged between the overflow dam section dam body 1 and the factory building dam section 10, a pumping and drainage system is arranged in the sand flushing bottom hole dam section 8, the pumping and drainage system is respectively communicated with an absorption and drainage bucket pool 2 and a protection flat 4 to pump water from the absorption and drainage bucket pool 2 and the protection flat 4, the pumping and drainage system is also communicated with the factory building tail water channel 11 to pump the water pumped from the absorption and drainage bucket pool 2 and the protection flat 4 into the factory building tail water channel 11, and an inter-dam guide wall 9 is arranged between the factory building tail water channel 11 and the protection flat 4 to separate the factory building tail water channel 11 from the protection flat 4.
The pumping drainage system comprises an overhaul water collecting well 14, a first embedded pipe 12 and a second embedded pipe 13 are arranged on the side face of the overhaul water collecting well 14, the first embedded pipe 12 is used for communicating the overhaul water collecting well 14 with the bottom of the side wall of the stilling bucket 2 so as not to disturb the rotating and rolling energy dissipation of water flow in the stilling bucket 2 during normal flood discharge, the second embedded pipe 13 is used for communicating the overhaul water collecting well 14 with a protection platform 4, a water collecting well pump house 15 is arranged above the overhaul water collecting well 14, and a plurality of water pumps 18 are arranged in the water collecting well pump house 15.
The junction of the rocky side slope 7 and the overhaul cofferdam core wall 5 is provided with an anti-seepage water-stop material, and the junction of the overhaul cofferdam core wall 5 and the plant dam guide wall 9 is also provided with an anti-seepage water-stop material. The bottom of the overhaul cofferdam core wall 5 is provided with an impervious curtain 17.
And rockfill bodies 16 with certain slopes are filled on two sides of the overhaul cofferdam core wall 5.
The drainage system and the overhaul cofferdam core wall 5 are both permanent structures.
The maintenance system of the bucket type stilling pool with large water depth adopts the following method to implement maintenance operation:
when a large-water deep-scoop type stilling pool needs to be overhauled, the reduction of water amount at the upstream of a dry water period, the reduction of water level at the downstream and the effective matching between the overhauling cofferdams at the tail parts of the aprons are utilized, only an overflow surface hole gate and a bottom hole gate in a sand flushing bottom hole dam section need to be closed, water in the stilling pool and the aprons are drained into an overhauling sump through a first pre-buried pipe and a second pre-buried pipe in the sand flushing bottom hole dam section, the water in the overhauling sump and the aprons is pumped into a workshop tail canal by using a water pump in a sump pump room, and at the moment, a dry construction environment required for overhauling can be formed in the stilling pool and the aprons; after the overhaul is finished, the overflow meter hole gate is opened to fill water into the absorption bucket tank, and then the normal operation can be recovered.
The invention provides a maintenance system and an implementation method of a large-water-depth scoop type stilling pool, compared with the prior art, the maintenance system is provided with a permanent drainage system and a maintenance cofferdam core wall structure, the top elevation of the concrete maintenance cofferdam core wall is slightly higher than the lowest downstream tail water level plus the wave climbing height, and the temporary cofferdam filling is avoided; the overhaul cofferdam core wall is positioned at the tail end of the downstream of the apron and is far away from the flood discharge and energy dissipation main flow area, and the structural style of protecting rock masses on two sides of the concrete overhaul cofferdam core wall is adopted, so that the reliability and the durability are better; seepage-proofing and water-stopping materials are respectively arranged between two ends of the overhaul cofferdam core wall and the rock slope and between the guide walls of the plant and the dam, and an seepage-proofing curtain is arranged on the overhaul cofferdam core wall foundation, so that the seepage-proofing effect is good; a pumping drainage system is arranged in the sand flushing bottom hole dam section, and comprises an overhaul water collecting well, a water collecting well pump room and a pre-buried pipe for communicating a bucket pool, a water body in a apron and the water collecting well, so that the arrangement and the removal of temporary pumping drainage equipment are avoided; the overhauling system of the large-water-depth scoop-type absorption basin provided by the invention can quickly pump water in the scoop-type absorption basin, has high reliability and can be repeatedly used, thereby providing sufficient construction period for overhauling of the scoop-type absorption basin and greatly reducing the operation and maintenance cost.
The above-described embodiments are intended to illustrate the present invention, but not to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit of the present invention and the scope of the claims fall within the scope of the present invention.
Claims (8)
1. The overhaul system of the large-water-depth scoop type stilling pool is characterized by comprising an overflow dam section dam body, wherein the downstream of the overflow dam section dam body is the scoop type stilling pool, the tail part of the scoop type stilling pool is provided with a scoop type stilling pool tail bank, the downstream of the scoop type stilling pool is provided with a apron, the tail part of the apron is provided with an overhaul cofferdam core wall, and the top elevation of the overhaul cofferdam core wall is slightly higher than the lowest tail water level of the downstream; the utility model discloses a river bed dam for building dam, including overflow dam section dam body, factory building dam section, sand washing bottom hole dam section, pumping drainage system, stilt, drainage system, factory building tail canal, factory building dam section, be equipped with sand washing bottom hole dam section between overflow dam section dam body and the factory building dam section, be equipped with pumping drainage system in the sand washing bottom hole dam section, pumping drainage system and stilt are linked together respectively in order to draw water from in stilt basin and the stilt, pumping drainage system still is linked together with factory building tail canal in order to go into factory building tail canal with the water that comes from in stilt basin and the stilt, be equipped with between factory building tail canal and the stilt and lead the wall in order to separate factory building tail canal and stilt between factory building dam.
2. The system of claim 1, wherein the pumping and drainage system comprises an inspection water collection well, the side of the inspection water collection well is provided with a first embedded pipe and a second embedded pipe, the first embedded pipe is used for communicating the inspection water collection well with the bottom of the side wall of the absorption bucket, the second embedded pipe is used for communicating the inspection water collection well with the apron, a water collection well pump room is arranged above the inspection water collection well, and a plurality of water pumps are arranged in the water collection well pump room.
3. The system as recited in claim 1, wherein said bucket is provided with a bucket side wall on a side adjacent to the bank slope, said bucket side wall downstream and said side edge of said apron being a rocky slope.
4. The system as recited in claim 2, wherein the rock slopes are provided with watertight material at the junction with the cofferdam core and the cofferdam core is also provided with watertight material at the junction with the guide wall between the plant and the dam.
5. The system of servicing a large water depth scoop type stilling pool of claim 1, wherein an impervious curtain is provided at the bottom of the service cofferdam core.
6. The large depth scoop digestion tank maintenance system of claim 1, wherein the maintenance cofferdam core is provided with a sloped rock-fill on both sides.
7. The large water deep scoop digestion tank maintenance system of claim 1, wherein the drainage system and maintenance cofferdam core are both permanent structures.
8. An implementation method of a large-water-depth scoop-type stilling pool overhauling system is characterized in that when a large-water-depth scoop-type stilling pool needs to be overhauled, the upstream water quantity reduction and the downstream water level reduction in a dry water period and the effective matching between overhauling cofferdam core walls at the tail part of a protection flat are utilized, only an overflow meter hole gate and a sand flushing bottom hole dam section inner bottom hole gate need to be closed, water in the scoop pool and the protection flat is drained to an overhauling water collecting well through a first pre-buried pipe and a second pre-buried pipe in the sand flushing bottom hole dam section, and the water in the overhauling water collecting well is pumped to a workshop tail canal by a water pump in a water collecting well pump room, so that a dry construction environment required for overhauling can be formed in the scoop pool and the protection flat; after the overhaul is finished, the overflow meter hole gate is opened to fill water into the absorption bucket tank, and then the normal operation can be recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910897107.3A CN110700206A (en) | 2019-09-23 | 2019-09-23 | Overhauling system and implementation method of large-water-depth scoop type stilling pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910897107.3A CN110700206A (en) | 2019-09-23 | 2019-09-23 | Overhauling system and implementation method of large-water-depth scoop type stilling pool |
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| CN110700206A true CN110700206A (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910897107.3A Pending CN110700206A (en) | 2019-09-23 | 2019-09-23 | Overhauling system and implementation method of large-water-depth scoop type stilling pool |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204151761U (en) * | 2014-10-11 | 2015-02-11 | 江苏省洪泽湖水利工程管理处 | Be installed in the submersible electric generating device in sluice absorption basin |
| CN106592540A (en) * | 2017-01-10 | 2017-04-26 | 中国电建集团贵阳勘测设计研究院有限公司 | Reusable stilling pool overhauling device and overhauling method |
| CN108005038A (en) * | 2017-11-30 | 2018-05-08 | 中国电建集团成都勘测设计研究院有限公司 | A kind of accumulated slag charge for remittance structure of underflow stilling basin |
| CN207512707U (en) * | 2017-11-28 | 2018-06-19 | 中国电建集团成都勘测设计研究院有限公司 | A kind of stiling basin for laying novel evacuation system |
| CN211472426U (en) * | 2019-09-23 | 2020-09-11 | 中国电建集团华东勘测设计研究院有限公司 | Overhauling system of large-water-depth scoop type stilling pool |
-
2019
- 2019-09-23 CN CN201910897107.3A patent/CN110700206A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204151761U (en) * | 2014-10-11 | 2015-02-11 | 江苏省洪泽湖水利工程管理处 | Be installed in the submersible electric generating device in sluice absorption basin |
| CN106592540A (en) * | 2017-01-10 | 2017-04-26 | 中国电建集团贵阳勘测设计研究院有限公司 | Reusable stilling pool overhauling device and overhauling method |
| CN207512707U (en) * | 2017-11-28 | 2018-06-19 | 中国电建集团成都勘测设计研究院有限公司 | A kind of stiling basin for laying novel evacuation system |
| CN108005038A (en) * | 2017-11-30 | 2018-05-08 | 中国电建集团成都勘测设计研究院有限公司 | A kind of accumulated slag charge for remittance structure of underflow stilling basin |
| CN211472426U (en) * | 2019-09-23 | 2020-09-11 | 中国电建集团华东勘测设计研究院有限公司 | Overhauling system of large-water-depth scoop type stilling pool |
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Application publication date: 20200117 |