CN114790714A - Later-stage diversion flood-fighting method for closed reservoir basin construction without permanent water release structure - Google Patents
Later-stage diversion flood-fighting method for closed reservoir basin construction without permanent water release structure Download PDFInfo
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- CN114790714A CN114790714A CN202210436215.2A CN202210436215A CN114790714A CN 114790714 A CN114790714 A CN 114790714A CN 202210436215 A CN202210436215 A CN 202210436215A CN 114790714 A CN114790714 A CN 114790714A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000010276 construction Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000000717 retained effect Effects 0.000 claims abstract description 4
- 239000004576 sand Substances 0.000 claims abstract description 4
- 238000005086 pumping Methods 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a method for diversion flood control in the later construction period of a closed reservoir basin without a permanent water release building, wherein the closed reservoir basin enters the later construction period, a reservoir bottom cushion layer and a reservoir bottom seepage-proof layer are constructed, reservoir bottom gallery concrete is poured, water inlet/outlet port concrete is poured, an access gate of a water inlet/outlet port cannot be used for closing down before flood, a water delivery system connected with the water inlet/outlet port is communicated with a matched factory building, and before the flood season comes, a drainage channel is opened at one side of the reservoir bottom gallery which is not in contact with the reservoir bottom cushion layer and the reservoir bottom seepage-proof layer and communicates the closed reservoir basin with the reservoir bottom gallery to perform drainage; meanwhile, water is retained at the periphery of the water inlet/outlet by utilizing a concrete structure or a piled sand bag; the discharge channel is plugged after flood to meet the permanent operation requirement. The invention can effectively solve the flood fighting problem of the reservoir and the factory building in the later construction period, avoids building a high cofferdam or configuring a large-capacity water pump for pumping water, and has the advantages of simple construction, low cost and small influence on permanent buildings.
Description
Technical Field
The invention relates to a flood control and flood fighting method, in particular to a later stage diversion and flood fighting method for closed reservoir basin construction without a permanent water release building.
Background
The pumped storage power station is provided with an upper reservoir and a lower reservoir according to the height of the reservoir, and a water delivery power generation system is arranged in a mountain between the upper reservoir and the lower reservoir. Different from hydropower station engineering built on large rivers, the pumped storage power station is generally small in basin area and small in natural river, and most upper reservoirs are runoff floods formed by rainstorm. Especially for closed storehouse basin arranged at the head of perennial runoff ditch, no special water outlet structure is generally arranged. Because the storehouse basin is communicated with the water delivery system through the water inlet/outlet, the construction diversion scheme in the construction period needs to be considered through the disc:
(1) in the early stage of construction, the gallery at the bottom of the reservoir is not closed, and the water delivery system is not communicated with the plant. The local part of the gallery at the bottom of the reservoir can be matched with a cofferdam around the water inlet/outlet in an unclosed way for flow guide;
(2) in the later construction stage, the water delivery system is communicated with a factory building, the construction of an impermeable layer at the bottom of a closed warehouse basin is nearly completed, and the ideal diversion mode is that the water inlet/outlet maintenance gate has a gate-down condition and is blocked by the gate.
In actual engineering, due to various reasons, the overhaul gate cannot be lowered in a flood season, a drainage channel does not exist in a warehouse, and a workshop constructed in the flood season has a great flood risk. How to guarantee the safe flood control of construction later stage reservoir and factory building adopts usually:
(1) and constructing cofferdam around the water inlet and the water outlet to block water, and pumping and discharging by using a pump. The limiting factors of the method are as follows: and in the later construction stage, the diversion standard is high, the cofferdam height is high, the impermeable layer at the bottom of the reservoir is close to the completion, the construction is difficult, and a pump is arranged.
(2) The concrete blocking body is poured in the water delivery tunnel, and the method has the following limiting factors: due to the existence of the concrete plugging body, construction traffic of partial hole sections of the water delivery system can be blocked, and the construction can not be carried out in the whole flood season.
Therefore, when the closed storehouse basin enters the later stage, the diversion in the construction period planned by using the conventional diversion mode is limited by construction and cost.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for diversion and flood control in the later construction stage of a closed reservoir basin without a permanent water release building, wherein the diversion and flood control of the reservoir basin are carried out by utilizing small holes, so that the engineering problem of high flood risk of a factory building when the closed reservoir basin enters the later construction stage is solved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a closed storehouse basin construction later stage diversion flood control method without building of permanent water discharge, the closed storehouse basin enters the construction later stage, the bed course of the storehouse bottom and impervious barrier of the storehouse bottom have already been constructed, the concrete of corridor of the storehouse bottom has already been pour and finished, enter/exit concrete has already been pour and finished, enter/the inspection gate of the exit can't lower the floodgate before flood, the water delivery system that is connected with entering/exit has already been communicated with supporting factory building, before the flood season comes, open the discharge passage on one side of the corridor of the storehouse bottom that is not contacted with bed course of the storehouse bottom and impervious barrier of the storehouse bottom, the discharge passage connects the closed storehouse basin with corridor of the storehouse bottom, carry on the discharge; meanwhile, water is retained at the periphery of the water inlet/outlet by utilizing a concrete structure or a piled sand bag; the discharge channel is plugged after flood to meet the permanent operation requirement.
The area of the basin in the closed warehouse at the head of the ditch and in the drainage basin does not exceed 0.5km 2 。
The water delivery system is communicated with the plant.
The water inlet/outlet is positioned at the lowest end of the storehouse basin and is connected with the water delivery tunnel and the factory building.
The drainage channel is arranged in the range with the lowest elevation at the top of the gallery at the bottom of the reservoir so as to reduce the size of the cofferdam.
The aperture of the opening of the drainage channel is not more than 30 cm.
The drainage channel is a geological drilling hole or a pre-embedded PVC pipe, and the pipe diameter is 20-30 cm.
The beneficial effects of the invention are: the problem of high risk of flood fighting of factory building that the water inlet/outlet can't lower floodgate manger plate and take the rib in storehouse basin construction later stage is solved. The invention comprehensively considers the combination of the permanent and temporary conditions, utilizes the small holes on the outward drainage gallery at the bottom of the reservoir to drain water, has small influence on permanent buildings on the premise of meeting the flood standard, is convenient to construct and has low construction cost.
Drawings
FIG. 1 is a schematic plan view of reservoir basin diversion using the method of the present invention.
FIG. 2 is a schematic diagram of the structure of the reservoir bottom gallery and its periphery using the method of the present invention.
In the figure: 1. sealing the storehouse basin; 2. a water inlet/outlet; 3. a reservoir bottom gallery; 4. water inlet/outlet concrete; 5. a reservoir bottom cushion layer; 6. a reservoir bottom barrier layer; 7. a corridor drain pipe; 8. a drain passage.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is to be understood that the embodiments described are merely exemplary embodiments, rather than exemplary embodiments, and that all other embodiments may be devised by those skilled in the art without departing from the scope of the present invention.
As shown in fig. 1 and 2, the invention does not have a method for diversion flood control in the later construction period of a closed reservoir basin without a permanent water release building, the closed reservoir basin 1 enters the later construction period, the reservoir bottom cushion layer 5 and the reservoir bottom impermeable layer 6 are both constructed, the reservoir bottom gallery 3 is cast, the water inlet/outlet port concrete 4 of the water inlet/outlet port 2 is cast, the maintenance gate of the water inlet/outlet port 2 cannot be controlled before flood, before the flood season comes, a drainage channel 8 is opened on one side of the reservoir bottom gallery 3 which is not in contact with the reservoir bottom cushion layer 5 and the reservoir bottom impermeable layer 6, and the drainage channel 8 communicates the closed reservoir basin 1 with the reservoir bottom gallery 3 for drainage; meanwhile, water is retained at the periphery of the water inlet/outlet 2 by utilizing a concrete structure or a stacked sand bag; the discharge channel 8 is plugged after flood to meet the permanent operation requirement.
The area of the closed storehouse basin at the head of the ditch and in the drainage basin is not more than 0.5km 2 。
The water delivery system is communicated with the plant.
The water inlet/outlet 2 is positioned at the lowest end of the storehouse basin 1 and is connected with a water delivery tunnel and a factory building.
The drainage channel 8 is arranged in the range with the lowest elevation at the top of the gallery at the bottom of the reservoir so as to reduce the size of the cofferdam.
The opening aperture of the drainage channel 8 is not more than 30 cm. Preferably, the drainage channel 8 is a geological drilling hole or a pre-embedded PVC pipe, and the pipe diameter is 20-30 cm.
In the figure 1 corridor drainpipe.
The closed reservoir basin is positioned at the head of a ditch, has small area of a drainage basin, is not provided with a permanent flood discharge building, and is formed by excavating and backfilling, and flood water in a flood season is mainly formed by rainstorm and is close to completion. The water inlet/outlet is a concrete structure which is positioned at the lowest end of the storehouse basin, is connected with the water delivery tunnel and the factory building and is used for realizing the functions of power generation and the like; the reservoir bottom gallery is a concrete structure which is arranged below the reservoir bottom and along the periphery of the reservoir bottom, and deep water in the reservoir is discharged after the water inlet/outlet are converged; the water inlet/outlet concrete is structural concrete poured to meet the water inlet requirement and is connected with the gallery concrete at the bottom of the reservoir; the reservoir bottom cushion layer and the reservoir bottom impermeable layer are positioned on one side of the reservoir bottom gallery, the part is finished in the later stage of reservoir basin construction, and the part is avoided by opening the small drainage hole.
The flood fighting method abandons the traditional thinking of building a high cofferdam around the water inlet/outlet and distributing a pump for pumping, and solves the problem of later-stage diversion flood fighting of the closed reservoir basin by temporarily perforating and transforming the reservoir bottom gallery with the least influence on the reservoir basin. The specific implementation process is as follows: and no cofferdam or a low cofferdam is built around the water inlet/outlet, the produced flood is blocked outside the cofferdam and stored at the lower part of the reservoir basin, and the accumulated water is discharged into the reservoir bottom gallery through the gallery small hole which is opened in advance and finally discharged through the reservoir bottom gallery outlet, so that the flood safety of the reservoir and the factory building is ensured.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to carry out the same, and the present invention shall not be limited to the embodiments, i.e. the equivalent changes or modifications made within the spirit of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A closed storehouse basin construction later stage diversion flood control method without building of permanent water discharge is characterized in that a closed storehouse basin enters into the construction later stage, a storehouse bottom cushion layer and a storehouse bottom seepage-proofing layer are all constructed, storehouse bottom gallery concrete is all poured, water inlet/outlet port concrete is poured, an access gate of a water inlet/outlet port cannot be used for closing before flood, a water delivery system connected with the water inlet/outlet port is communicated with a matched factory building, before the flood season comes, a discharge passage is opened at one side of the storehouse bottom gallery not in contact with the storehouse bottom cushion layer and the storehouse bottom seepage-proofing layer, and the closed storehouse basin is communicated with the storehouse bottom gallery through the discharge passage for discharge; meanwhile, water is retained at the periphery of the water inlet/outlet by utilizing a concrete structure or a piled sand bag; the flow discharge channel is plugged after flood so as to meet the permanent operation requirement.
2. The method for diversion flood control in the later construction period of the closed reservoir basin without the permanent water release structure according to claim 1, wherein the closed reservoir basin is positioned at the head of a ditch, and the area of a drainage basin does not exceed 0.5km 2 。
3. The method for later stage diversion flood control in closed reservoir basin construction without permanent water release buildings according to claim 1, wherein the water delivery system is communicated with a factory building.
4. The method for later stage diversion flood control in closed reservoir basin construction without permanent water release structures as claimed in claim 1, wherein said water inlet/outlet is located at the lowest end of the reservoir basin and connected with water delivery tunnel and factory building.
5. The method for diversion flood control in the later stage of closed reservoir basin construction without permanent water release buildings according to claim 1, wherein the drainage channels are arranged in the range with the lowest elevation at the top of the reservoir bottom gallery to reduce the cofferdam scale.
6. The method for diversion flood control in the later construction period of the closed reservoir basin without the permanent drainage building according to claim 1 or 5, wherein the aperture of the opening of the drainage channel is not more than 30 cm.
7. The method for diversion flood control in the later period of construction of the closed reservoir basin without the permanent water release building according to claim 6, wherein the water release channel is a geological drilled hole or a pre-embedded PVC pipe, and the pipe diameter is 20-30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210436215.2A CN114790714A (en) | 2022-04-24 | 2022-04-24 | Later-stage diversion flood-fighting method for closed reservoir basin construction without permanent water release structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210436215.2A CN114790714A (en) | 2022-04-24 | 2022-04-24 | Later-stage diversion flood-fighting method for closed reservoir basin construction without permanent water release structure |
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| Publication Number | Publication Date |
|---|---|
| CN114790714A true CN114790714A (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210436215.2A Pending CN114790714A (en) | 2022-04-24 | 2022-04-24 | Later-stage diversion flood-fighting method for closed reservoir basin construction without permanent water release structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006328811A (en) * | 2005-05-26 | 2006-12-07 | Fudo Kogaku Design Kenkyusho | Construction method of sand removal facility using temporary drainage channel in bank |
| CN107700440A (en) * | 2017-10-31 | 2018-02-16 | 广东水电二局股份有限公司 | A kind of diversion tunnel concrete plug and its construction method |
| CN112982300A (en) * | 2021-02-01 | 2021-06-18 | 中国电建集团华东勘测设计研究院有限公司 | Seepage-proofing and drainage connecting structure for asphalt concrete face plate of reservoir bank and geomembrane at reservoir bottom and construction method |
| CN215211400U (en) * | 2020-12-30 | 2021-12-17 | 中国电建集团华东勘测设计研究院有限公司 | Gravity flow drainage structure after plugging of adverse slope construction branch tunnel of nearly underground factory building |
-
2022
- 2022-04-24 CN CN202210436215.2A patent/CN114790714A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006328811A (en) * | 2005-05-26 | 2006-12-07 | Fudo Kogaku Design Kenkyusho | Construction method of sand removal facility using temporary drainage channel in bank |
| CN107700440A (en) * | 2017-10-31 | 2018-02-16 | 广东水电二局股份有限公司 | A kind of diversion tunnel concrete plug and its construction method |
| CN215211400U (en) * | 2020-12-30 | 2021-12-17 | 中国电建集团华东勘测设计研究院有限公司 | Gravity flow drainage structure after plugging of adverse slope construction branch tunnel of nearly underground factory building |
| CN112982300A (en) * | 2021-02-01 | 2021-06-18 | 中国电建集团华东勘测设计研究院有限公司 | Seepage-proofing and drainage connecting structure for asphalt concrete face plate of reservoir bank and geomembrane at reservoir bottom and construction method |
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Application publication date: 20220726 |