CN107326876B - Non-closed non-pumping drainage plunge pool structure - Google Patents
Non-closed non-pumping drainage plunge pool structure Download PDFInfo
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- CN107326876B CN107326876B CN201710692371.4A CN201710692371A CN107326876B CN 107326876 B CN107326876 B CN 107326876B CN 201710692371 A CN201710692371 A CN 201710692371A CN 107326876 B CN107326876 B CN 107326876B
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a non-closed non-pumping drainage plunge pool structure, which is positioned on two sides of a plunge pool (1) and comprises a closed structure (3) and a permeable structure (4); the closed structure (3) is positioned above the middle-upper parts of the two sides of the plunge pool (1) and above the permeable structure (4); a water stopping structure (5) is arranged in a structural joint between adjacent concrete wall surfaces (2) in the closed structure (3), a transverse drain pipe (6.1) and a longitudinal drain pipe (6.2) are arranged on the wall back of each concrete wall surface (2), and the transverse drain pipe (6.1) and the longitudinal drain pipe (6.2) are mutually interwoven and run through to form a drain pipe network (6); the method overcomes the defect of side wall instability damage caused by water stop damage or drainage system failure in the prior art, and has the advantage of greatly reducing the construction difficulty.
Description
Technical Field
The invention relates to the technical field of water conservancy and hydropower flood discharge, in particular to a non-closed non-pumping drainage plunge pool structure.
Background
Along with the construction of large-scale water conservancy and hydropower engineering in southwest areas of China, engineering characteristics such as 'high water head, large flow, narrow river valley' and the like are more prominent, and flood discharge and energy dissipation safety are important points of research in engineering. In the existing flood discharge and energy dissipation design of high arch dam engineering, a flood discharge and energy dissipation mode of dam body raising and falling flow is almost completely adopted, and the energy dissipation mode has the characteristics of simple engineering structure, short construction period, strong adaptability to the change of discharge capacity and tail water depth and the like. Because the flood discharge power of the high arch dam engineering is huge, how to avoid the serious scouring of the flood discharge water flow to the downstream river channel is important for the research in the engineering design. With the construction of high arch dam projects in China, through technical attack between 'seventy five' and 'nine five', in the existing high arch dam projects, the fall-choosing flood discharge energy dissipation mode is that an artificial concrete plunge pool with complete lining is arranged at the downstream for energy dissipation.
According to the research result of the flow state of water flow in the plunge pool, the water flow in the plunge pool is in an obvious oblique submerged impact jet flow state after entering water, and submerged hydraulic jumps are formed in the plunge pool of the plunge pool, so that the basic flow structure of the plunge pool is a mixed structure of a jet main flow region and a vortex region. The boundary area of the main flow area and each macroscopic vortex area is a layer of strong turbulent shearing action area, and the effective mechanical energy (kinetic energy) of the main flow is continuously eliminated and stopped in the area through strong turbulent shearing and diffusion action, so that the energy dissipation effect is achieved. Because of the strong turbulent action of water in the plunge pool, larger pulsating pressure is generated on the side wall and the bottom plate of the plunge pool, thereby influencing the stability of the side wall and the bottom plate. In order to avoid the turbulent water body in the plunge pool to enter the wall back to generate larger uplifting force, and simultaneously to reduce uplifting pressure, the plunge pool behind the existing high arch dam engineering dam adopts a closed pumping structure type: set up stagnant water in the structural joint between the concrete plate, set up drainage pipe network and drainage corridor at the plate back, with the back infiltration through the drainage pipe network in the drainage corridor to further collect in the sump pit, discharge through the water pump. The side wall of the closed pumping-discharging type plunge pool structure is of a closed structure from top to bottom, a seepage field on the back of the side wall is completely separated from water in the plunge pool, the water level of the back of the wall is low, and pulsating pressure basically does not exist, so that the load condition influencing the stability of the side wall is clear, the stability of the side wall is not influenced by the dynamic water pressure and water level shock drop in the plunge pool, and the stability of the side wall is good.
However, the water stopping and draining system of the closed pumping-draining type plunge pool structure is complex, continuous pumping and draining are needed in the normal operation period, the long-term operation and maintenance are carried out, the engineering investment and the operation cost are high, and the safety risk of side wall instability and damage caused by water stopping damage or drainage system failure exists.
In recent years, with the construction of concrete high arch dams in southwest areas of China, deep covering layers and deep water mats in dam sites become an important characteristic of flood discharge and energy dissipation building design, so that energy dissipation of natural water mats of riverways can be fully utilized, and the simplification of protection design of water mats and ponds is possible, for example, a scheme of the water mats and ponds with bank protection and without bottom protection is adopted. The bottom of the scheme of the plunge pool is not provided with a concrete lining, if a closed pumping drainage structural form is still adopted, in order to prevent water bodies in the plunge pool from seeping to the back of the side wall through the bottom winding, an anti-seepage curtain needs to be arranged at the bottom of the side wall, the construction difficulty and the engineering investment are increased, and the reliability is difficult to guarantee. Meanwhile, because the side slope of the narrow river valley is high and steep, the concrete side walls on the two sides of the plunge pool are high, the water stopping and draining systems of the side walls are complex, the risk of local side wall instability caused by water stopping damage and draining system failure exists, and the difficulty in overhauling if the draining system is blocked is high. The closed pumping and discharging type structure needs continuous pumping and discharging in a normal operation period, long-term operation and maintenance are realized, and the operation cost is higher. If a non-closed plunge pool structure can be provided, and the pumping drainage is cancelled, the structural design of the plunge pool can be greatly simplified, the construction difficulty is reduced, the construction risk is reduced, and the operation cost can be reduced.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provides a non-closed non-pumping drainage plunge pool structure.
The technical scheme of the invention is implemented by the following technical scheme: the non-closed non-pumping drainage plunge pool structure is positioned on two sides of the plunge pool and comprises a closed structure and a permeable structure; the closed structure is positioned above the middle upper part of the two sides of the plunge pool and above the permeable structure; concrete wall surfaces are continuously poured on two sides of the plunge pool;
a water stopping structure is arranged in a structural joint between adjacent concrete wall surfaces in the closed structure, a transverse drain pipe and a longitudinal drain pipe are arranged on the back of the concrete wall surface, and the transverse drain pipe and the longitudinal drain pipe are interwoven and communicated with each other to form a drain pipe network;
a plurality of first drainage holes are drilled inwards along the back of the concrete wall surface in the closed structure in advance,
the pre-buried trend of the drainage pipe network in the closed structure is consistent with the trend of the first drainage hole;
the first drainage hole outlet is embedded with the outlet of the drainage pipe network and is arranged at the tail end of the concrete wall surface in the closed structure at equal intervals along the transverse direction;
a plurality of second drain holes are drilled inwards on the back of the concrete wall surface wall in the permeable structure,
and a sleeve is sleeved on the outlet of each second drain hole.
In the above technical scheme: the bottom of the plunge pool adopts a natural terrain or a permeable structure.
In the above technical scheme: the bottom of the concrete wall surface on two sides is provided with tooth grooves protruding downwards.
In the above technical scheme: the orifices of the second drain holes are arranged on the concrete wall surface of the permeable structure at equal intervals along the transverse direction and the longitudinal direction.
In the above technical scheme: the included angle between the directions of the orifices of the outlets of the first drain hole and the second drain hole and the horizontal plane is 10 degrees, and the orifices are arranged in an upward mode.
The invention has the following advantages: 1. the bottom drainage gallery, the bottom seepage-proof curtain and the drainage curtain are eliminated, the closed pumping system is eliminated, and the construction difficulty is greatly reduced.
2. During normal operation and maintenance, the seepage water of the pond mountain and the wall back is mainly discharged through the drain holes, so that pumping drainage is not needed, and the operation and management are convenient.
3. The height of the side wall closed area is reduced, and the risk of local side wall instability caused by water stop damage and drainage system failure is small.
4. The side wall surface water outlets of the closed parts can be arranged in combination with the side slope corridors, and the running condition of a wall back water drainage pipe network can be judged according to the drainage condition of the water outlets, so that the inspection is visual, and the running maintenance is relatively convenient.
5. The non-closed non-pumping drainage plunge pool structure type has larger anchoring engineering quantity, but the engineering quantities of seepage control engineering, side wall concrete, water stop, drainage pipe network, pumping drainage system and the like are obviously reduced. Taking Wu Dongde engineering as an example, compared with the scheme of closing pumping drainage type plunge pool side wall, the method does not consider the operation and maintenance cost of canceling pumping drainage, and can save about 3000 ten thousand direct investment of engineering.
Drawings
Fig. 1 is a structural layout diagram of a plunge pool and a dam body.
Fig. 2 is a diagram of the overall structural arrangement of the present invention.
Fig. 3 is a schematic structural view of a one-side closed structure and a water permeable structure according to the present invention.
Fig. 4 is a structural layout diagram of a drain pipe network and drain holes in the present invention.
In the figure: the water-cushion pond comprises a plunge pool 1, a concrete wall surface 2, a closed structure 3, a permeable structure 4, a water stop structure 5, a drainage pipe network 6, a transverse drainage pipe 6.1, a longitudinal drainage pipe 6.2, a first drainage hole 7.1, a second drainage hole 7.2, a dam 8, an upstream water surface 9 and a downstream water surface 10.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the invention is not limited thereto, and is given by way of example only; while the advantages of the invention will be apparent and readily appreciated by the description.
Referring to FIGS. 1-4: the non-closed non-pumping drainage plunge pool structure is positioned at two sides of a plunge pool 1,
it comprises a closed structure 3 and a permeable structure 4; the closed structure 3 is positioned above the middle-upper parts of the two sides of the plunge pool 1 and above the permeable structure 4; concrete wall surfaces 2 are continuously poured on two sides of the plunge pool 1;
a water stopping structure 5 is arranged in a structural joint between adjacent concrete wall surfaces 2 in the closed structure 3, a transverse drain pipe 6.1 and a longitudinal drain pipe 6.2 are arranged on the wall backs of the concrete wall surfaces 2, and the transverse drain pipe 6.1 and the longitudinal drain pipe 6.2 are mutually interwoven and communicated to form a drain pipe network 6;
a plurality of first drainage holes 7.1 are drilled inwards along the back of the concrete wall surface 2 in the closed structure 3 in advance,
the pre-buried trend of the drainage pipe network 6 in the closed structure 3 is consistent with the trend of the first drainage hole 7.1;
the outlets of the first drainage holes 7.1 are embedded with the outlets of the drainage pipe network 6 and are arranged at the tail end of the concrete wall surface 2 in the closed structure 3 at equal intervals along the transverse direction;
a plurality of second drain holes 7.2 are drilled in the back of the concrete wall surface 2 in the permeable structure 4, and a sleeve is sleeved on the outlet of each second drain hole 7.2.
The bottom of the plunge pool 1 adopts a natural terrain or a permeable structure.
The bottom of the concrete wall surface 2 on two sides is provided with tooth grooves 2.1 protruding downwards.
The orifices of the second drain holes 7.2 are arranged on the concrete wall surface 2 of the permeable structure 4 at equal intervals along the transverse direction and the longitudinal direction; the included angle between the trend of the orifices of the outlets of the first drain hole 7.1 and the second drain hole 7.2 and the horizontal plane is 10 degrees, and the orifices are arranged upwards.
The invention also comprises a construction method: step (1): plunge pool 1 placement and structural sizing
Determining a specific arrangement scheme and a structural type of the plunge pool 1 by combining pivot arrangement and a flood discharge and energy dissipation scheme; and determining the main structural dimensions such as the length, the width, the bottom elevation and the like of the plunge pool according to hydraulic calculation and hydraulic model test results.
Step (2): water-cushion pond side slope excavation
And (3) excavating the side slope of the plunge pool 1 according to the structural requirement of the plunge pool 1 and by combining the topographic and geological conditions, wherein the excavation slope ratio and the excavation thickness meet the integral stability of the side slope of the plunge pool.
And (3): plunge pool slope support
In the excavation process of the side slope of the plunge pool, the surface unloading can cause the problem of local stability of the side slope, and meanwhile, a rock mass structural plane can form an unstable block, so that the slope surface of the plunge pool side slope needs to be supported, including system support, random support, deep support and the like, and the first drain hole 7.1 and the second drain hole 7.2 are implemented.
And (4): construction of side wall structure of water-cushion pond
After the excavation of the side slope of the plunge pool 1 is finished, the concrete wall surface 2 of the side wall of the plunge pool is constructed, and the construction projects mainly comprise the construction projects of cleaning a foundation rock surface, constructing anchoring measures, binding reinforcing steel bars, installing a water stopping structure 5, a drainage pipe network 6, installing a first drainage hole 7.1 and a second drainage hole 7.2, pouring concrete and the like, wherein each construction project meets the regulations of relevant regulations and requirements of construction technologies.
The main technical requirements of the non-closed non-pumping drainage plunge pool structure in the specific implementation process are as follows:
(1) The non-closed non-pumping drainage plunge pool structure comprises a closed structure 3 and a permeable structure 4, wherein the closed structure 3 is generally arranged in an area with severe water surface fluctuation and strong water body turbulence (arrows in the figure indicate water flow directions, and small triangles indicate water level lines).
(2) In 3 structural scopes of enclosed construction, 2 plates on concrete wall form integral enclosed construction through setting up modes such as stagnant water structure 5, and horizontal drain pipe 6.1 and longitudinal drain pipe 6.2 have been arranged to the wall back to concentrate the first drainage hole 7.1 that converges to closed off side wall surface with the infiltration of discharging through the side slope wash port in the side slope and concentrate the discharge. The side wall structure in the closed area should ensure the reliability of the whole closure and the smoothness of the wall back drainage pipe network.
(3) The first drainage holes 7.1 on the surface of the concrete wall surface 2 of the closed structure 3 are arranged according to needs, the quantity is not too large, turbulent water in the water-proof pad pond 1 is transmitted to the back surface of the concrete wall surface 2 through the first drainage holes 7.1, the first drainage holes 7.1 can be arranged in combination with side slope corridors and arranged above the normal operation water level of the water-proof pad pond 1, and the operation condition of the closed structure drainage system can be conveniently and visually judged through the drainage condition of the first drainage holes 7.1.
(4) The second drain hole 7.2 of the concrete wall surface 2 in the permeable structure 4 is directly led out to the surface of the concrete wall surface 2, the seepage water discharged from the side slope through the side slope drain hole in the side slope is directly discharged into the plunge pool 1 through the second drain hole 7.2, and the aperture and the interval of the second drain hole 7.2 are consistent with those of the side slope drain hole. In order to improve the drainage effect of the side wall of the permeable area, the number of the drain holes in the range can be properly encrypted, and the holes are protected in the drain holes to prevent blockage.
The table is a comparison table for the engineering quantity and design approximate calculation of the non-closed non-pumping drainage plunge pool structure
The above-mentioned parts which are not described in detail are prior art.
Claims (3)
1. Non-closed suction drainage plunge pool structure, it is located the both sides of plunge pool (1), its characterized in that: it comprises a closed structure (3) and a water permeable structure (4); the closed structure (3) is positioned above the middle-upper parts of the two sides of the plunge pool (1) and above the permeable structure (4); concrete wall surfaces (2) are continuously poured on two sides of the plunge pool (1);
a water stopping structure (5) is arranged in a structural joint between adjacent concrete wall surfaces (2) in the closed structure (3), a transverse drain pipe (6.1) and a longitudinal drain pipe (6.2) are arranged on the wall back of each concrete wall surface (2), and the transverse drain pipe (6.1) and the longitudinal drain pipe (6.2) are mutually interwoven and run through to form a drain pipe network (6);
a plurality of first drainage holes (7.1) are drilled inwards in advance along the wall back of the concrete wall surface (2) in the closed structure (3),
the pre-buried trend of the drainage pipe network (6) in the closed structure (3) is consistent with the trend of the first drainage hole (7.1);
outlets of the first drainage holes (7.1) are embedded with outlets of the drainage pipe network (6) and are arranged at the tail end of the concrete wall surface (2) in the closed structure (3) at equal intervals along the transverse direction;
a plurality of second drain holes (7.2) are drilled inwards on the back of the concrete wall surface (2) in the water permeable structure (4),
a sleeve is sleeved on the outlet of each second drain hole (7.2); the orifices of the second drain holes (7.2) are arranged on the concrete wall surface (2) of the permeable structure (4) at equal intervals along the transverse direction and the longitudinal direction;
the included angles between the directions of the orifices of the outlets of the first drain hole (7.1) and the second drain hole (7.2) and the horizontal plane are 10 degrees and are arranged upwards; the first drainage hole (7.1) is arranged above the normal operation water level of the plunge pool (1).
2. The non-enclosed, pumpless plunge pool structure of claim 1, wherein: the bottom of the plunge pool (1) adopts a natural terrain or a permeable structure.
3. The non-enclosed, pumpless plunge pool structure of claim 1 or 2, wherein: the bottom of the concrete wall surface (2) on two sides is provided with tooth grooves (2.1) protruding downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710692371.4A CN107326876B (en) | 2017-08-14 | 2017-08-14 | Non-closed non-pumping drainage plunge pool structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710692371.4A CN107326876B (en) | 2017-08-14 | 2017-08-14 | Non-closed non-pumping drainage plunge pool structure |
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| Publication Number | Publication Date |
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| CN107326876A CN107326876A (en) | 2017-11-07 |
| CN107326876B true CN107326876B (en) | 2023-02-28 |
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| CN201710692371.4A Active CN107326876B (en) | 2017-08-14 | 2017-08-14 | Non-closed non-pumping drainage plunge pool structure |
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| CN112777788A (en) * | 2020-12-22 | 2021-05-11 | 成都华阳建筑股份有限公司 | Circulating water system for building construction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787614A (en) * | 2012-08-31 | 2012-11-21 | 黄河勘测规划设计有限公司 | Drainage structure of excavation slope of plunge pool |
| CN103556611A (en) * | 2013-11-05 | 2014-02-05 | 中国水电顾问集团华东勘测设计研究院有限公司 | Plunge pool water filling and discharging system capable of generating electricity |
| CN204644989U (en) * | 2015-03-30 | 2015-09-16 | 三峡大学 | A kind of cushion pool with efficient erosion control energy-dissipating structure |
| CN207159958U (en) * | 2017-08-14 | 2018-03-30 | 长江勘测规划设计研究有限责任公司 | Non-close is without pump drainage cushion pool structure |
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2017
- 2017-08-14 CN CN201710692371.4A patent/CN107326876B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787614A (en) * | 2012-08-31 | 2012-11-21 | 黄河勘测规划设计有限公司 | Drainage structure of excavation slope of plunge pool |
| CN103556611A (en) * | 2013-11-05 | 2014-02-05 | 中国水电顾问集团华东勘测设计研究院有限公司 | Plunge pool water filling and discharging system capable of generating electricity |
| CN204644989U (en) * | 2015-03-30 | 2015-09-16 | 三峡大学 | A kind of cushion pool with efficient erosion control energy-dissipating structure |
| CN207159958U (en) * | 2017-08-14 | 2018-03-30 | 长江勘测规划设计研究有限责任公司 | Non-close is without pump drainage cushion pool structure |
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