CN112144468A - Riverbed flow guide structure for hydraulic engineering construction - Google Patents
Riverbed flow guide structure for hydraulic engineering construction Download PDFInfo
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- CN112144468A CN112144468A CN202010990254.8A CN202010990254A CN112144468A CN 112144468 A CN112144468 A CN 112144468A CN 202010990254 A CN202010990254 A CN 202010990254A CN 112144468 A CN112144468 A CN 112144468A
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- water
- cofferdam
- retaining cofferdam
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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
- 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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Abstract
The invention relates to a river bed diversion structure for hydraulic engineering construction, which comprises an outer side water retaining cofferdam, a grass soil cofferdam attached to the outer side of the outer side water retaining cofferdam, an inner side water retaining cofferdam arranged at the inner side of the outer side water retaining cofferdam and having a certain distance, and a scoop surface arranged between the inner side water retaining cofferdam and the outer side water retaining cofferdam, wherein the inner side water retaining cofferdam and the outer side water retaining cofferdam form a diversion open channel; the scoop face is arranged at the cross water outlet of the diversion open channel and the original river channel. The invention has the advantages that the diversion open channel with high strength, no leakage, low cost and reusability can be formed by arranging the steel plate cofferdam and the grass-soil cofferdam; the impact of river water on the diversion structure can be reduced through the arranged scoop surfaces, the scouring pit is shallower, and the service life of the diversion open channel is prolonged.
Description
Technical Field
The invention relates to the field of water conservancy construction diversion, in particular to a riverbed diversion structure for water conservancy engineering construction.
Background
With the rapid development of economy and the continuous improvement of production and life, more and more electric energy and clean water are needed, while hydroelectric power generation is a clean energy source and is popularized all over the world; as the natural environment is worsened and water shortage places are increased, natural water resources are collected, and the problem which needs to be solved urgently at present is also solved by building the reservoir. No matter hydroelectric power generation or reservoir building, a dam needs to be built by intercepting, water diversion of a river channel needs to be carried out before the dam is built, the current diversion technologies comprise open channel diversion, culvert pipe diversion and the like, most of open channel diversion adopts concrete to build a cofferdam, the concrete cofferdam has high manufacturing cost, and the problems of incapability of recycling, resource waste and the like after the concrete cofferdam is dismantled after the project is finished need to be solved.
Therefore, how to design a riverbed diversion structure for hydraulic engineering construction, which can be repeatedly used, becomes a problem to be solved at present.
Disclosure of Invention
The invention aims to provide a river bed diversion structure for hydraulic engineering construction, which can be repeatedly used and has long service life.
In order to solve the problems, the invention adopts the following technical proposal,
a river bed diversion structure for hydraulic engineering construction comprises an outer side water retaining cofferdam, a grass soil cofferdam attached to the outer side of the outer side water retaining cofferdam, an inner side water retaining cofferdam arranged at the inner side of the outer side water retaining cofferdam and having a certain distance, and a scoop surface arranged between the inner side water retaining cofferdam and the outer side water retaining cofferdam, wherein a diversion open channel is formed by the inner side water retaining cofferdam and the outer side water retaining cofferdam; the scoop face is arranged at the cross water outlet of the diversion open channel and the original river channel.
Further, the grass soil cofferdam comprises a soil-stone layer and a grass bale; the straw bundles and the soil and stone material layer are arranged in a layered mode from top to bottom.
Further, the outer side water-retaining cofferdam and the inner side water-retaining cofferdam comprise arc-shaped steel plates and sand stones; the arc-shaped steel plates are a plurality of blocks, the lower portions of the arc-shaped steel plates are buried in the foundation of a riverbed, the arc-shaped steel plates form two side walls of the cofferdam, and the sand and stone materials are added between the two side walls.
Further, the scoop face is constructed of a concrete material. The scoop face has a bottom surface with a length of L1, the L1 is 12000mm, the upper portion of the scoop face has a water block with a height of h1, the h1 is 1000 mm; the top of the water retaining table is semi-cylindrical, the radius of the semi-cylindrical is R1, the radius of the semi-cylindrical is R1 mm, the length of the semi-cylindrical surface extending out of the bottom surface is L2, and the length of the L2 is 250 mm; the scoop surface is provided with a water flow inclined plane, the water flow inclined plane is arranged downwards along the tangential direction of the semi-cylindrical surface, the included angle between the water flow inclined plane and the vertical direction is a, and the a is more than 45 degrees; an arc-shaped water return surface is arranged at the lower part of the bucket surface and is tangent with the lower part of the water flow inclined surface, the radius of the arc-shaped water return surface is R2, the R2 is 400mm, the height of the lowest point of the arc-shaped water return surface and the bottom surface is h2, the h2 is 200mm, the height of one end, away from the water flow inclined surface, of the arc-shaped water return surface from the bottom surface is h20, and the h20 is 300 mm.
Further, the radius of the outer side water-retaining cofferdam is R5, the radius of the inner side water-retaining cofferdam is R6, the R5 is larger than the difference of five times of R5 and R6, and the minimum R6 is two times of the width of the main river dam body; the outer side water retaining cofferdam and the joint of the inner side water retaining cofferdam and the old river channel are in arc transition, the included angle between the center line of the diversion structure enclosed by the outer side water retaining cofferdam and the inner side water retaining cofferdam and the main center line is b, and b is not less than 30 degrees.
The invention has the beneficial effects that:
1. the river water needing to be guided can be guided through the arranged outer cofferdam and the inner water retaining cofferdam, so that a dry field is provided for the construction of a dam, and the construction is facilitated;
2. through the radian design of the outer cofferdam and the inner water retaining cofferdam, the impact of the diversion water on the cofferdam can be reduced, so that the cofferdam cannot collapse during diversion;
3. through the arranged steel plate cofferdam piles, the piles can be detached for repeated use after the project is finished, and waste is avoided;
4. the set grass soil cofferdam can avoid water seepage of the steel plate cofferdam;
5. the water can be effectively retained and the impact of water flow on the ground can be reduced by the cylindrical design of the water retaining platform of the scoop surface;
6. potential energy can be effectively slowed down through the design that the angle of the water flowing inclined plane of the scoop surface is more than 45 degrees, and the direct impact of water flow on the riverbed is avoided;
7. through the design of the arc-shaped water return surface of the scoop surface, the water flow forms turbulent flow, the washing of the water flow to the riverbed is slowed down, and the service life of the riverbed is prolonged;
8. the river bed diversion structure adopts the design of the steel plate cofferdam and the grass soil cofferdam, can prevent leakage, has high cofferdam strength and long service life, can be repeatedly used, has low construction cost, and is worthy of great popularization.
Drawings
FIG. 1 is a front view of the present invention in a schematic configuration;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;
fig. 4 is a sectional view at C-C of fig. 1.
The reference numbers in the figures illustrate:
1-outer side water retaining cofferdam, 2-grass soil cofferdam, 3-scoop surface, 4-inner side water retaining cofferdam, 5-old river channel, 6-dam, 10-sandstone layer, 11-steel plate, 20-straw bale, 21-soil-rock layer, 30-water flow inclined plane, 31-semi-cylindrical surface.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it is to be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", left and right. The positional or orientational relationships indicated before, after, etc. are based on the positional or orientational relationships shown in the drawings and are intended to be merely to facilitate the description of the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation and is therefore not to be construed as limiting the invention. Furthermore, the terms "first," "second," "one end," and "the other end" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed", "sleeved/connected", "connected", and the like, are to be interpreted broadly, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
As shown in fig. 1-4:
a river bed diversion structure for hydraulic engineering construction comprises an outer side water retaining cofferdam 1, a grass soil cofferdam 2 attached to the outer side of the outer side water retaining cofferdam 1, an inner side water retaining cofferdam 4 arranged at the inner side of the outer side water retaining cofferdam 1 and having a certain distance, and a scoop surface 3 arranged between the inner side water retaining cofferdam 4 and the outer side water retaining cofferdam 1, wherein the inner side water retaining cofferdam 4 and the outer side water retaining cofferdam 1 form a diversion open channel, and the diversion open channel is provided with a water outlet; the scoop face 3 is arranged at the water outlet of the diversion open channel.
The grass soil cofferdam 2 comprises a soil-rock layer 21 and a straw bale 20; the grass bales 20 and the soil and stone material layers 21 are arranged in a vertically layered mode, and the grass soil cofferdam 2 has the advantages of being low in manufacturing cost, good in seepage prevention effect, capable of obtaining local materials, capable of automatically adapting to terrain settlement and the like.
The outer water-retaining cofferdam 1 and the inner water-retaining cofferdam 4 comprise arc-shaped steel plates 11 and grit materials 10; the arc-shaped steel plates 11 are a plurality of blocks, the lower parts of the arc-shaped steel plates 11 are buried in the foundation of a riverbed, the arc-shaped steel plates 11 form two side walls of the cofferdam, and the sand material 10 is added between the two side walls; the steel plate cofferdam has the advantages of high strength and capability of being disassembled for recycling after the project is finished, so that the purposes of saving materials and reducing consumption are achieved, and the defect is that the anti-leakage effect is poor.
The scoop face 3 is constructed of a concrete material. The scoop face 3 has a bottom surface with a length of L1, the L1 is 12000mm, the upper portion of the scoop face 3 has a water-stop table with a height of h1, the h1 is 1000 mm; the top of the water retaining table is a semi-cylindrical surface 31; the semi-cylindrical surface 31 is arranged in the incoming water direction, the radius of the semi-cylindrical surface 31 is R1, the R1 is 300mm, the length of the semi-cylindrical surface 31 extending out of the bottom surface is L2, and the length of the L2 is 250 mm; the scoop face 3 is provided with a water flow bevel 30, the water flow bevel 30 is arranged downwards along the tangential direction of the semi-cylindrical face 31, the water flow bevel 30 forms an included angle a with the vertical direction, and the a is larger than 45 degrees; the lower part of the bucket surface 3 is provided with an arc-shaped water return surface, the arc-shaped water return surface is tangent to the lower part of the water flow inclined plane 30, the radius of the arc-shaped water return surface is R2, R2 is 400mm, the lowest point of the arc-shaped water return surface is h2, h2 is 200mm, the height of one end, away from the water flow inclined plane 30, of the arc-shaped water return surface from the bottom surface is h20, and h20 is 300 mm.
The radius of the outer water-retaining cofferdam 1 is R5, the radius of the inner water-retaining cofferdam 4 is R6, the R5 is larger than the difference of five times of R5 and R6, and the minimum R6 is two times of the width of the main river dam body 6; the joints of the outer water-retaining cofferdam 1 and the inner water-retaining cofferdam 3 with the old river 5 are in arc transition; the included angle between the center line of the diversion structure enclosed by the outer water-retaining cofferdam 1 and the inner water-retaining cofferdam 4 and the center line of the original river channel is b, and b is not less than 30 degrees; if the included angle is too small, the distance between the diversion structure and the original river channel 5 is too close, and the stability of the old river channel 5 is affected.
The working process of the flow guide structure is as follows:
the arc-shaped steel plates 11 are vertically inserted into a foundation, the arc-shaped steel plates 11 form a cofferdam wall, sand and stone are added into the cofferdam wall, the outer side of the cofferdam formed by the arc-shaped steel plates is closely provided with a grass-soil cofferdam, a diversion open channel is formed by enclosing the outer side of an old river channel, when a dam needs to be built, river water enters the diversion open channel for diversion, a scoop surface is arranged at the outlet of the diversion open channel, and the dam breaking is avoided in order to reduce sand washing of the river water to a river bed.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (5)
1. The utility model provides a riverbed water conservancy diversion structure for hydraulic engineering construction which characterized in that: the open channel diversion system comprises an outer side water retaining cofferdam (1), a grass soil cofferdam (2) attached to the outer side of the outer side water retaining cofferdam (1), an inner side water retaining cofferdam (4) arranged on the inner side of the outer side water retaining cofferdam (1) and a scoop surface (3) arranged between the inner side water retaining cofferdam (4) and the outer side water retaining cofferdam (1), wherein the inner side water retaining cofferdam (4) and the outer side water retaining cofferdam (1) form a diversion open channel; the diversion open channel is provided with a water outlet; the scoop face (3) is arranged at the water outlet of the diversion open channel.
2. The riverbed diversion structure for the hydraulic engineering construction according to claim 1, wherein: the grass soil cofferdam (2) comprises a soil-stone layer (21) and a bale (20); the straw bales (20) and the soil and stone material layers (21) are arranged in a vertical layered mode.
3. The riverbed diversion structure for the hydraulic engineering construction according to claim 1, wherein: the outer side water-retaining cofferdam (1) and the inner side water-retaining cofferdam (4) comprise arc-shaped steel plates (11) and sand stones (10); the arc-shaped steel plates (11) are a plurality of blocks, the lower portions of the arc-shaped steel plates (11) are buried in a foundation of a river bed, the arc-shaped steel plates (11) form two side walls of the cofferdam, and the sand stone materials (10) are added into the two side walls.
4. The riverbed diversion structure for the hydraulic engineering construction according to claim 1, wherein: the scoop face (3) is constructed of a concrete material. The scoop face (3) has a bottom surface with a length of L1, the L1 is 12000mm, the scoop face (3) has a water-stop table with a height of h1, the h1 is 1000 mm; the top of the water retaining table is a semi-cylindrical surface (31), the radius of the semi-cylindrical surface (31) is R1, the R1 is 300mm, the length of the semi-cylindrical surface (31) extending out of the bottom surface is L2, and the length of the L2 is 250 mm; the scoop face (3) is provided with a water flow inclined plane (30), the water flow inclined plane (30) is arranged downwards along the tangential direction of the semi-cylindrical face (31), the included angle between the water flow inclined plane (30) and the vertical direction is a, and the a is more than 45 degrees; the lower part of the bucket surface (3) is provided with an arc-shaped water return surface, the arc-shaped water return surface is tangent to the lower part of the water flow inclined surface (30), the radius of the arc-shaped water return surface is R2, R2 is 400mm, the lowest point of the arc-shaped water return surface is h2, h2 is 200mm, the height of one end, away from the water flow inclined surface (30), of the arc-shaped water return surface from the bottom surface is h20, and h20 is 300 mm.
5. The riverbed diversion structure for the hydraulic engineering construction according to claim 1, wherein: the radius of the outer side water-retaining cofferdam (1) is R5, the radius of the inner side water-retaining cofferdam (4) is R6, the R5 is larger than the difference of five times of R5 and R6, and the minimum R6 is twice of the width of the main river channel dam body; the joints of the outer water-retaining cofferdam (1) and the inner water-retaining cofferdam (4) and the main river channel are in arc transition; and the included angle between the center line of the diversion structure enclosed by the outer water-retaining cofferdam (1) and the inner water-retaining cofferdam (4) and the center line of the original river channel is b, and the b is not less than 30 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010990254.8A CN112144468A (en) | 2020-09-19 | 2020-09-19 | Riverbed flow guide structure for hydraulic engineering construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010990254.8A CN112144468A (en) | 2020-09-19 | 2020-09-19 | Riverbed flow guide structure for hydraulic engineering construction |
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| CN112144468A true CN112144468A (en) | 2020-12-29 |
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| CN202010990254.8A Withdrawn CN112144468A (en) | 2020-09-19 | 2020-09-19 | Riverbed flow guide structure for hydraulic engineering construction |
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| CN1238408A (en) * | 1998-05-13 | 1999-12-15 | 清原满族自治县水利勘测设计室 | Low dam for eliminating potential energy by drainage and its construction method |
| US20090297280A1 (en) * | 2008-05-28 | 2009-12-03 | Mcbride Todd | Shiftable Fluid Diversion Conduit |
| KR20160048730A (en) * | 2016-03-30 | 2016-05-04 | 한동훈 | Method for excavating base rock of on the sea |
| CN106381878A (en) * | 2016-10-27 | 2017-02-08 | 中建三局集团有限公司 | Environment-friendly dismantling construction method for two-layer steel sheet pile and soil core composite cofferdam |
| CN108612117A (en) * | 2018-06-07 | 2018-10-02 | 深圳市市政设计研究院有限公司 | A kind of seabed water-retaining structure across municipal tunnel greatly and construction method |
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| CN111364419A (en) * | 2020-03-30 | 2020-07-03 | 西藏农牧学院 | Overflow dam |
-
2020
- 2020-09-19 CN CN202010990254.8A patent/CN112144468A/en not_active Withdrawn
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|---|---|---|---|---|
| CN1238408A (en) * | 1998-05-13 | 1999-12-15 | 清原满族自治县水利勘测设计室 | Low dam for eliminating potential energy by drainage and its construction method |
| US20090297280A1 (en) * | 2008-05-28 | 2009-12-03 | Mcbride Todd | Shiftable Fluid Diversion Conduit |
| KR20160048730A (en) * | 2016-03-30 | 2016-05-04 | 한동훈 | Method for excavating base rock of on the sea |
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