CN103276703B - Folded-line shape diversion pier of spillway - Google Patents
Folded-line shape diversion pier of spillway Download PDFInfo
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- CN103276703B CN103276703B CN201310237609.6A CN201310237609A CN103276703B CN 103276703 B CN103276703 B CN 103276703B CN 201310237609 A CN201310237609 A CN 201310237609A CN 103276703 B CN103276703 B CN 103276703B
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Abstract
The invention relates to a folded-line shape diversion pier of a spillway. The folded-line shape diversion pier comprises an upper pier, a middle pier and a lower pier or comprises a middle pier and a lower pier. The upper pier is a semi-cylindrical pier, the middle pier comprises a middle pier body, an overhead view surface of the middle pier body is an isosceles trapezoid, side view surfaces of the middle pier body are right triangles, a pier head in the shape of a semicircular oblique frustum with a small bottom and a large top is arranged on the front oblique surface of the middle pier body, the lower pier comprises a pier body in the shape of a triangular prism,wherein the overhead view surface of the pier body is a rectangle and the side view surfaces are right triangles, a pier body in the shape of an isosceles oblique trapezoidal prism with a small front portion and a large rear portion is arranged on the front oblique surface of the pier body in the shape of the triangular prism, side view surfaces of the pier body in the shape of the isosceles oblique trapezoidal prism are parallelograms, and a pier head in the shape of a semicircular oblique cylindrical table is arranged on the front oblique surface of the pier body in the shape of the oblique trapezoidal prism. The folded-line shape diversion pier has the advantages that the folded-line shape diversion pier has a regular size, stress on each pier head is simple, a downstream flow condition is improved, the construction difficulty is reduced, requirements on the strength of materials is lowered, and the folded-line shape diversion pier is adaptable to flow rate variation in a large range.
Description
Technical field
Content of the present invention belongs to water engineering facility technical field, relates to a kind of Folded-line shape diversion pier of spillway that can be used for ensureing the water engineering facility safety such as reservoir dam, outlet structure escape works, powerhouse of hydropower station.
Background technology
In prior art, known most typical flood spillway baffle pier is exactly gate pier, and the vertical semicolumn of pier nose body, is mainly applicable to low flow velocity.For Spillway chute, flow velocity is higher, more at present to Aeration research, and build is also more, but for pure baffle pier, does not still have ripe build.Used baffle pier can be divided into two large classes: the first kind is that pier nose body is vertical, and its pier nose shape has the semicircle assembly of triangle, semicircle and triangle; Equations of The Second Kind is that pier nose body tilts, its angled manner is divided into again straight line to tilt and camber line tilts two kinds, the shape of straight line inclination pier nose has the semicircle assembly of triangle, semicircle and triangle, and the shape of camber line inclination pier nose is semicircle, and pier shaft is complex space pinch plane.The weak point that existing baffle pier build exists in actual applications is: (1) fluidised form is bad, shows as or water wing is too high, spray of water, or current take off wall, causes downstream current disorderly; (2) the stressed complexity of pier nose, easily causes structural vibration; (3) be suitable for range of flow little, restriction water reservoir management runs; (4) pier shaft build is too complicated, and inconvenient civil engineering is implemented; (5) easily there is flow cavitation, cause baffle pier cavitation erosion; (6) require high to the baffle pier strength of materials, improve difficulty of construction and construction cost.
Summary of the invention
The object of the invention is to the weak point overcoming prior art existence, there is provided a kind of project organization rational Folded-line shape diversion pier of spillway, the build rule of this Folded-line shape diversion pier of spillway, pier nose is simply stressed, improve downstream m flow state, reduce difficulty of construction, reduce the requirement to the strength of materials, changes in flow rate in a big way can be adapted to.
Such for realizing the technical scheme of foregoing invention object: the Folded-line shape diversion pier of spillway provided have one be connected with in partition wall one end, downstream by the fold-line-shaped pier nose body being highly respectively the top pier body of H3, H2 and H1, middle part pier body and bottom pier body and forming, wherein
Described top pier body be a height H 3 equal 0 or be not equal to 0 semi-cylindrical pier body, the diameter of pier body is equal with the thickness D of downstream partition wall;
Described middle part pier body has one to be overlooked face and is isosceles trapezoid and side-looking face is the middle body pier shaft of right-angled triangle, the front bevel of middle body pier shaft is provided with the semicircle oblique cone platform pier nose that little top, the end is large, the end radius of circle of semicircle oblique cone platform pier nose is R2, tip circle radius R 3 is equal with the radius R 4 of top pier body, and the upper surface of semicircle oblique cone platform pier nose coincide with the lower surface of top pier body and transition is connected;
Described bottom pier body has one to be overlooked face and is rectangle and side-looking face is the triangle cylindricality pier shaft of right-angled triangle, the front bevel of triangle cylindricality pier shaft is provided with the pre-small post-large isosceles inclined ladder shape prism pier shaft that a side-looking face is parallelogram, the upper surface of inclined ladder shape prism pier shaft coincide with the lower surface of middle part pier body and transition is connected, the front bevel of inclined ladder shape prism pier shaft is provided with semicircle batter post platform pier nose, and the radius R 1 of semicircle batter post platform pier nose is that R2 is equal with the end radius of circle of middle part pier body upper semi-circle oblique cone platform pier nose.
Technical scheme of the present invention also comprises: the radius R 1 of bottom pier body upper semi-circle batter post platform pier nose is 0.10m ~ 0.20m, angle theta 1 between the front bevel of the inclined ladder shape prism pier shaft of bottom pier body and bottom surface is 22 ° ~ 32 °, on the pier body of bottom inclined ladder shape prism pier shaft two trapezoidal side edges between angle theta 3 be 14 ° ~ 24 °, height H 1=(0.8 ~ 1.1) Hw, the Hw of bottom pier body are maximum water depth before flood spillway baffle pier.
Technical scheme of the present invention also comprises: the end radius of circle R2 of middle part pier body upper semi-circle oblique cone platform pier nose is 0.10m ~ 0.20m, and the angle theta 2 between middle part pier body front bevel and bottom surface is 43 ° ~ 53 °.
Technical scheme of the present invention also comprises: the height H 3+H2+H1 of baffle pier is equal with the height H 0 of downstream partition wall.
In Folded-line shape diversion pier of spillway structure of the present invention, what mainly play shunting action is bottom pier body, and middle part pier body role connects upper and lower part pier body, and top pier body role then mainly meets partition wall height.
Compared with prior art, the present invention has following beneficial effect:
1, the bottom pier nose in Folded-line shape diversion pier of spillway of the present invention adopts small radius semicircle, has a mind to avoid triangle point pier nose, and its semicircle eases up straight line diffusion combination, avoid current and take off wall, improve baffle pier stressed, avoid structural vibration again, reduce cavitation erosion;
2, the bottom pier body gradient in Folded-line shape diversion pier of spillway of the present invention is less, can ensure not produce water wing when medium-small flow;
3, the middle part pier body gradient in Folded-line shape diversion pier of spillway of the present invention is comparatively large, and it and bottom light grade pier body combinationally use, and when can ensure large discharge, water wing is small, and completely adherent.Three sections of (or two sections) fold-line-shaped pier nose structures also can ensure that the fluidised form of the downstream water stream when various traffic conditions is steady;
4, the middle part semicircle oblique cone platform pier nose arranged in Folded-line shape diversion pier of spillway of the present invention makes upper and lower part pier body be able to be connected with ruled surface, difficulty of construction is reduced, has good flow condition after ensureing shunting simultaneously;
5, the top pier body of Folded-line shape diversion pier of spillway of the present invention adopts traditional vertical semicolumn pier nose structure, its object is to baffle pier can be naturally connected with downstream partition wall;
6, in the present invention, the pier nose part of whole baffle pier is ruled surface, and pier shaft is plane entirely, and build is relatively simple, constructability, and the pier body of whole baffle pier all can have been constructed with materials such as steel concrete, can meet the requirement of strength of facility.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure schematic diagram of Folded-line shape diversion pier of spillway of the present invention.
Fig. 2 is the lateral view of this Folded-line shape diversion pier of spillway.
Fig. 3 is overlooking to layout plan of this Folded-line shape diversion pier of spillway.
Fig. 4 be in Fig. 2 A-A to the top view of plane.
Fig. 5 be in Fig. 2 B-B to the top view of plane.
In accompanying drawing, each numeral or alphabetical designation represent respectively: 1-downstream partition wall, 2-top pier body, body pier shaft in 31-, 32-semicircle oblique cone platform pier nose, 41-triangle cylindricality pier shaft, 42-inclined ladder shape prism pier shaft, 43-semicircle batter post platform pier nose; D-downstream partition wall thickness; H0-downstream partition wall height, H1-bottom pier height, pier height in the middle part of H2-, H3-top pier height; L1+L2-bottom pier body length, pier body length in the middle part of L3-; The radius of R1-semicircle batter post platform pier nose, the end radius of circle of R2-semicircle oblique cone platform pier nose, the tip circle radius of R3-semicircle oblique cone platform pier nose, R4-top pier body radius; Angle between the front bevel of θ 1-(bottom pier body) inclined ladder shape prism pier shaft and bottom surface, the angle in the middle part of θ 2-between pier body front bevel and bottom surface, the angle between two trapezoidal side edges of θ 3-(bottom pier body) inclined ladder shape prism pier shaft.
Detailed description of the invention
Below with reference to accompanying drawing, content of the present invention is described further, but specific embodiment of the invention form is not limited in following embodiment.
See accompanying drawing, Folded-line shape diversion pier of spillway of the present invention is made up of the top pier body 2 be connected with in downstream partition wall 1 one end, middle part pier body and bottom pier body, and the height of three pier bodies and (H3+H2+H1) equal the wall height H0 of downstream partition wall 1.Top pier body 2 be a height H 3 equal 0 or be not equal to 0 semi-cylindrical pier body, the radius R 4 of pier body equals the half of the thickness D of downstream partition wall 1.Middle part pier body is long is L3, and be made up of middle body pier shaft 31 and semicircle oblique cone platform pier nose 32, wherein, the face of overlooking of middle body pier shaft 31 is isosceles trapezoid, the right-angled triangle of to be base angle be in side-looking face θ 2; The large semicircle oblique cone platform pier nose 32 in little top, the end is arranged on the front bevel of middle body pier shaft 31, the end radius of circle of semicircle oblique cone platform pier nose 32 is R2, tip circle radius R 3 is equal with the radius R 4 of top pier body 2, and the upper surface of semicircle oblique cone platform pier nose 32 coincide with the lower surface of top pier body 2 and transition is connected.The length of bottom pier body is L1+L2, is made up of triangle cylindricality pier shaft 41, isosceles inclined ladder shape prism pier shaft 42 and semicircle batter post platform pier nose 43.The face of overlooking of triangle cylindricality pier shaft 41 is rectangle, and side-looking face is right-angled triangle; Isosceles inclined ladder shape prism pier shaft 42 is arranged on the front bevel of triangle cylindricality pier shaft 41, the side-looking face of isosceles inclined ladder shape prism pier shaft 42 is parallelogram, the face of overlooking is pre-small post-large isosceles inclined ladder shape, and the upper surface of inclined ladder shape prism pier shaft 42 coincide with the lower surface of middle part pier body and transition is connected; The front bevel that semicircle batter post platform pier nose 43 is arranged on inclined ladder shape prism pier shaft 42 is provided with, and the radius R 1 of semicircle batter post platform pier nose 43 is that R2 is equal with the end radius of circle of middle part pier body upper semi-circle oblique cone platform pier nose 32.Angle between the front bevel of the inclined ladder shape prism pier shaft of bottom pier body and bottom surface is θ 1, angle between two trapezoidal side edges of inclined ladder shape prism pier shaft is θ 3, height H 1=(0.8 ~ 1.1) Hw of bottom pier body, Hw is the highest water surface curve height (maximum water depth) before flood spillway baffle pier, is generally 2.5m ~ 7.5m.
Embodiment 1
θ1=26°34′，θ2=47°58′，θ3=18°51′，L1=3.75m，L2=8.4m，L3=3.75m，R1=0.15m,R2=0.15m,R3=0.75m，H1=4.2m，H2=4.02m，H3=0m，H0=8.22，Hw=3.37m，D=1.5m。
Embodiment 2
θ1=27°14′，θ2=52°14′，θ3=18°51′，L1=3.75m，L2=14m，L3=7.02m，R1=0.15m，R2=0.15m，R3=0.75m,R4=0.75m，H1=7m，H2=4.02m，H3=7.12m，H0=18.14m，Hw=6.95m，B=1.5m。1:20 falls in flood spillway ratio.
Experimental example
Some hydropower station engineering comprises key dam, auxiliary dam, outlet structure escape works, generating water diverting structure, powerhouse of hydropower station.Key dam is concrete slab gravel---loose rock dam, and spillway layout, in left bank, adopts open type, elevation of weir crest 1925.00m, checks discharge 407.33m
3/ s.There is feature in this engineering river course very much, its very narrow (only having 12m), width of spillway is very large again with the ratio of river width, reach 9/12=3/4, in addition, choose the bealock that 70m place, bank downstream has an about 8m wide, this just requires to control sater professionals, choose apart from can not be excessive, the requirement in river course must be adapted to.Conventional slit is difficult to the feature adapting to this river course, and through experiment, finally this engineering adopts baffle pier+double Yonug's slit energy dissipater.
The Major Difficulties of baffle pier+double Yonug's slit energy dissipater is designing suitable baffle pier, if adopt vertical blunt nosed pier nose, pier nose seriously dabbles; Adopt vertical tips pier nose, still have some to dabble, can not concrete constructions be used; Adopt 8 meters high oblique blunt nosed pier noses, the gradient about 30 degree, pier nose dabbles Resolving probiems, and side dabbles than stronger; Adopt 4 meters high oblique blunt nosed pier noses, the gradient about 30 degree, highly not enough, current are crossed pier nose and are caused and dabble.
After fully proving, this engineering finally adopts fold-line-shaped baffle pier of the present invention.Adopt fold-line-shaped baffle pier+double Yonug's slit to choose bank, the overflow form of various operating mode is good, engineering demands, and from configuration aspects, abutment wall is not high, and it is stressed also little, is applicable to this engineering specifications.According to pier nose features of shape, adopt the blunt nosed pier of fold-line-shaped, have the consideration of two aspects, one is to ensure fluidised form, avoids pier nose to dabble, and two is avoid tip pier consciously, make pier nose to use concrete constructions, meet flood spillway construction principle, avoid adopting steel to build.
Designer observes in an experiment: when reservoir level is normal pool level, and table hole office opens 3m, baffle pier top discharge per unit width 16.3m
3/ (sm), flow velocity 9.61m/s, current are smooth-going separately, and do not have water wing, fluidised form is steady; When reservoir level is normal pool level, table hole standard-sized sheet, baffle pier top discharge per unit width 35.72m
3/ (sm), flow velocity 14.88m/s, current are smooth-going separately, and do not have water wing, fluidised form is steady; When reservoir level is design water level, table hole standard-sized sheet, baffle pier top discharge per unit width 46.67m
3/ (sm), flow velocity 17.54m/s, produce small adherent water wing, do not have spray of water, downstream m flow state is steady; When reservoir level is check water level, table hole standard-sized sheet, baffle pier top discharge per unit width 68.18m
3/ (sm), flow velocity 19.13m/s, produce the adherent water wing high less than half meter, downstream current are still smooth-going, and fluidised form is fair.Build significantly simplifies comparatively speaking, is all regular shape, is convenient to site construction, structure does not produce structural vibration and cavitation erosion, and baffle pier is stressed little, adopts conventional concrete namely can build, without the need to adopting strong concrete, build specification, is convenient to promote.
Claims (4)
1. a Folded-line shape diversion pier of spillway, it is characterized in that: have one be connected with in downstream partition wall (1) one end by the fold-line-shaped pier nose body being highly respectively top pier body (2) of H3, H2 and H1, middle part pier body and bottom pier body and forming, wherein
Described top pier body (2) be a height H 3 equal 0 or be not equal to 0 semi-cylindrical pier body, the diameter (2R4) of pier body is equal with the thickness D of downstream partition wall (1);
Described middle part pier body has one to be overlooked face and is isosceles trapezoid and side-looking face is the middle body pier shaft (31) of right-angled triangle, the front bevel of middle body pier shaft (31) is provided with large semicircle oblique cone platform pier nose (32) in little top, the end, the end radius of circle of semicircle oblique cone platform pier nose (32) is R2, tip circle radius R 3 is equal with the radius R 4 on top pier body (2), and the upper surface of semicircle oblique cone platform pier nose (32) coincide with the lower surface on top pier body (2) and transition is connected;
Described bottom pier body has one to be overlooked face and is rectangle and side-looking face is the triangle cylindricality pier shaft (41) of right-angled triangle, the front bevel of triangle cylindricality pier shaft (41) is provided with pre-small post-large isosceles inclined ladder shape prism pier shaft (42) that a side-looking face is parallelogram, the upper surface of inclined ladder shape prism pier shaft (42) coincide with the lower surface of middle part pier body and transition is connected, the front bevel of inclined ladder shape prism pier shaft (42) is provided with semicircle batter post platform pier nose (43), the radius R 1 of semicircle batter post platform pier nose (43) is equal with the end radius of circle R2 at middle part pier body upper semi-circle oblique cone platform pier nose (32).
2. Folded-line shape diversion pier of spillway according to claim 1, it is characterized in that: the radius R 1 of bottom pier body upper semi-circle batter post platform pier nose (43) is 0.10m ~ 0.20m, angle theta 1 between the front bevel of the inclined ladder shape prism pier shaft (42) of bottom pier body and bottom surface is 22 ° ~ 32 °, on the pier body of bottom inclined ladder shape prism pier shaft (42) two trapezoidal side edges between angle theta 3 be 14 ° ~ 24 °, height H 1=(0.8 ~ 1.1) Hw, the Hw of bottom pier body are maximum water depth before flood spillway baffle pier.
3. Folded-line shape diversion pier of spillway according to claim 1, it is characterized in that: the end radius of circle R2 at middle part pier body upper semi-circle oblique cone platform pier nose (32) is 0.10m ~ 0.20m, the angle theta 2 between middle part pier body front bevel and bottom surface is 43 ° ~ 53 °.
4. Folded-line shape diversion pier of spillway according to claim 1, is characterized in that: the height H 3+H2+H1 of baffle pier is equal with the height H 0 of downstream partition wall (1).
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| CN201310237609.6A CN103276703B (en) | 2013-06-14 | 2013-06-14 | Folded-line shape diversion pier of spillway |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108360473A (en) * | 2018-02-09 | 2018-08-03 | 杨凌职业技术学院 | The construction method of bank is chosen in a kind of three-dimensional scatter energy dissipating |
| CN108442340A (en) * | 2018-02-09 | 2018-08-24 | 杨凌职业技术学院 | A kind of three-dimensional whole-section aeration bank |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106480859B (en) * | 2016-09-27 | 2018-08-17 | 四川大学 | Parting formula gate pier and parting formula bridge pier |
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Patent Citations (4)
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Cited By (2)
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| CN108360473A (en) * | 2018-02-09 | 2018-08-03 | 杨凌职业技术学院 | The construction method of bank is chosen in a kind of three-dimensional scatter energy dissipating |
| CN108442340A (en) * | 2018-02-09 | 2018-08-24 | 杨凌职业技术学院 | A kind of three-dimensional whole-section aeration bank |
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