CN101624818A - Differential column-splitting inlet energy dissipater - Google Patents
Differential column-splitting inlet energy dissipater Download PDFInfo
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- CN101624818A CN101624818A CN200910060124A CN200910060124A CN101624818A CN 101624818 A CN101624818 A CN 101624818A CN 200910060124 A CN200910060124 A CN 200910060124A CN 200910060124 A CN200910060124 A CN 200910060124A CN 101624818 A CN101624818 A CN 101624818A
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Abstract
The invention relates to a differential column-splitting inlet energy dissipater, comprising a water current inlet section, a stilling pool connected with the water current inlet section, and an apron connected with the stilling pool; the water current inlet section is composed of a high-level drainage channel (drainage hole) and a lower-level drainage channel (drainage hole) which are arrayed alternatively, a slim is arranged at the boundary position of a drop-sill of the outlet end part of the high-level drainage channel of the water current inlet section and the lower-level drainage channel and a bottom plate of the stilling pool, the slim is a right-angle wedge shape, the bottom surface of the right-angle wedge shape is arranged on the bottom plate of the stilling pool, and the side surface vertical to the bottom surface of the right-angle wedge shape is attached to the drop-sill of the outlet end part of the high-level drainage channel of the water current inlet section and the lower-level drainage channel, a tail sill of the stilling pool is a differential tail sill, and the top surface of the differential tail sill is formed by a combined surface unit I and a combined surface II which have different structures and are arrayed alternatively; a middle isolated pier tail between the high-level drainage channel and the lower-level drainage channel is a cantilever type streamline pier tail. The energy dissipater can improve the service life and reduces scouring damage of water current to downstream river channels.
Description
Technical field
The invention belongs to the flood-discharge energy-dissipating facility, particularly a kind of flow inlet energy dissipater who is used for high water head, big discharge per unit width.
Background technology
For the current of high water head, big discharge per unit width, its flood-discharge energy-dissipating is extremely important, but difficulty is also big, is the focus and the difficult point problem of water conservancy circle research always.The patent application of publication number CN 101215828A discloses a kind of high and low ridge underflow stilling basin, and its technical scheme is that the high bank of flow inlet section (also claiming high-order dredging flow groove) is adopted suitable angle of throat in the plane, but the external wall of the high bank of opposite side does not shrink.Though the energy-dissipating installation of this kind structure can solve in the absorption basin and the bigger problem of absorption basin tail bank place's water level fluctuation under given conditions, but have the following disadvantages: 1, the long-time precipitated mud and sand of boundary that falls bank and absorption basin base plate of high bank of flow inlet section (high-order dredging flow groove or discharge orifice) and low bank (low level dredging flow groove discharge orifice) outlet end, abrasion absorption basin stem base plate under vertical shaft whirlpool and the effect of transverse axis whirlpool, certainly will damage the absorption basin structure, have a strong impact on the normal operation of release floodwatering facility, even cause the Important Project accident.2, absorption basin is undesirable with being connected of downstream river course, causes current more serious to washing away of downstream river course.3, the easy cavitation destruction of middle dividing pier between Gao Kan (high-order dredging flow groove or discharge orifice) and the low bank (low level dredging flow groove or discharge orifice).
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of improved differential column-splitting inlet energy dissipater is provided, fall the long-time precipitated mud and sand of boundary of bank and absorption basin base plate and the cavitation and cavitation erosion problem of middle dividing pier to solve high-order dredging flow groove of flow inlet section or discharge orifice and low level dredging flow groove or discharge orifice outlet end, and improve being connected of absorption basin and downstream river course, reduce the erosion damage of current to downstream river course.
Differential column-splitting inlet energy dissipater of the present invention, the absorption basin that comprises the flow inlet section, joins with the flow inlet section, the protection-apron that joins with absorption basin, the flow inlet section is made of alternately high-order dredging flow groove or high-order discharge orifice and low level dredging flow groove or low level discharge orifice; The boundary of falling bank and absorption basin base plate of the high-order dredging flow groove of flow inlet section or high-order discharge orifice and low level dredging flow groove or low level discharge orifice outlet end is provided with the subsides pin, described subsides pin is the right angle wedge shape, the bottom surface of right angle wedge shape is positioned on the absorption basin base plate, and paste mutually with the bank that falls of the high-order dredging flow groove of flow inlet section or high-order discharge orifice and low level dredging flow groove or low level discharge orifice outlet end the side perpendicular to the bottom surface in the right angle wedge shape; Absorption basin tail bank is a differential type tail bank, described differential type tail bank, and its end face is formed alternately by two kinds of different combinatorial surface unit I and combinatorial surface unit II of structure; Middle dividing pier pier tail between high-order dredging flow groove or high-order discharge orifice and low level dredging flow groove or the low level discharge orifice is the streamlined pier tail of cantilevered.
Subsides pin in the above-mentioned differential column-splitting inlet energy dissipater, differential type tail bank, the preferred following structure of middle dividing pier pier tail:
1, the gradient i of subsides pin is 1: 1～1: 15, length d
4≤ L
3＜d
3, described d
3Fall bank height, d for high-order dredging flow groove of flow inlet section or high-order discharge orifice outlet end
4Fall the bank height for flow inlet section low level dredging flow groove or low level discharge orifice outlet end.
2, the combinatorial surface unit I that forms differential type tail bank end face is made up of inclined-plane-plane-inclined-plane-plane successively, and its plane near absorption basin is higher than the plane near protection-apron; The combinatorial surface unit II that forms differential type tail bank end face is made up of plane-inclined-plane-plane successively, and its plane near absorption basin is higher than the plane near protection-apron; The length b of described combinatorial surface unit I
1Length b with combinatorial surface unit II
2Ratio b
1: b
2=1: 1～1: 3.
3, the length L of middle dividing pier pier tail
4Be 1.5～2 times of middle dividing pier thickness, its top with flush with middle dividing pier top, its bottom with the absorption basin base plate apart from d
4=d
6＜d
3, described d
3Fall bank height, d for high-order dredging flow groove of flow inlet section or high-order discharge orifice outlet end
4Fall the bank height for flow inlet section low level dredging flow groove or low level discharge orifice outlet end.
The flow inlet section of differential column-splitting inlet energy dissipater of the present invention can be designed to following four kinds of builds:
1, high-order dredging flow groove does not have and extrudes stream and the low level dredging flow groove does not have the stream of extrusion;
2, high-order dredging flow groove does not have the stream of extrusion, the low level discharge orifice has the stream of extrusion;
3, high-order discharge orifice has the stream of extrusion, low level dredging flow groove not to have the stream of extrusion;
4, high-order discharge orifice has the stream of extrusion and low level discharge orifice that the stream of extrusion is arranged.
The present invention has following beneficial effect:
1, because the boundary of falling bank and absorption basin base plate of the high-order dredging flow groove of flow inlet section or high-order discharge orifice and low level dredging flow groove or low level discharge orifice outlet end is provided with the subsides pin, thereby avoided silt particle to deposit for a long time herein, also increased the thickness of absorption basin stem base plate simultaneously, thereby improved the stress condition of absorption basin stem base plate, improved application life.
2, because the tail bank of absorption basin is designed to differential type tail bank, thereby improved being connected of absorption basin and downstream river course, reduced the erosion damage of current downstream river course.
3, because the middle dividing pier pier tail between high-order dredging flow groove or high-order discharge orifice and low level dredging flow groove or the low level discharge orifice is designed to the streamlined pier tail of cantilevered, thereby dividing pier is improved application life by cavitation and cavitation erosion in can avoiding.
Description of drawings
Fig. 1 is first kind of layout plan of differential column-splitting inlet energy dissipater of the present invention, and high-order dredging flow groove is an even number, and the low level dredging flow groove is an odd number, and high-order dredging flow groove and low level dredging flow groove are wide build;
Fig. 2 is second kind of layout plan of differential column-splitting inlet energy dissipater of the present invention, and high-order dredging flow groove is an odd number, and the low level dredging flow groove is an even number, and high-order dredging flow groove and low level dredging flow groove are wide build;
Fig. 3 is sectional view and the absorption basin at section same with it place and the schematic diagram of protection-apron that does not have the high-order dredging flow groove that extrudes stream;
Fig. 4 is sectional view and the absorption basin at section same with it place and the schematic diagram of protection-apron that does not have the low level dredging flow groove that extrudes stream;
Fig. 5 is sectional view and the absorption basin at section same with it place and the schematic diagram of protection-apron that the low level discharge orifice that extrudes stream is arranged;
Fig. 6 is sectional view and the absorption basin at section same with it place and the schematic diagram of protection-apron that the high-order discharge orifice that extrudes stream is arranged;
Fig. 7 is the 1-1 sectional drawing of the differential column-splitting inlet energy dissipater of layout shown in Figure 1, extrudes stream but high-order dredging flow groove among the figure and low level dredging flow groove are nothing;
Fig. 8 is the 2-2 sectional drawing of the differential column-splitting inlet energy dissipater of layout shown in Figure 2, extrudes stream but high-order dredging flow groove among the figure and low level dredging flow groove are nothing;
Fig. 9 is the 1-1 sectional drawing of the differential column-splitting inlet energy dissipater of layout shown in Figure 1, but the high-order dredging flow groove among the figure extrudes stream for nothing, and the low level discharge orifice is for there being the stream of extrusion;
Figure 10 is the 2-2 sectional drawing of the differential column-splitting inlet energy dissipater of layout shown in Figure 2, but the high-order dredging flow groove among the figure extrudes stream for nothing, and the low level discharge orifice is for there being the stream of extrusion;
Figure 11 is the 1-1 sectional drawing of the differential column-splitting inlet energy dissipater of layout shown in Figure 1, but the high-order discharge orifice among the figure extrudes stream for having, and the low level dredging flow groove is not for there being the stream of extrusion;
Figure 12 is the 2-2 sectional drawing of the differential column-splitting inlet energy dissipater of layout shown in Figure 2, but the high-order discharge orifice among the figure extrudes stream for having, and the low level dredging flow groove is not for there being the stream of extrusion;
Figure 13 is the 1-1 sectional drawing of the differential column-splitting inlet energy dissipater of layout shown in Figure 1, but high-order discharge orifice among the figure and low level discharge orifice have been extrusion stream;
Figure 14 is the 2-2 sectional drawing of the differential column-splitting inlet energy dissipater of layout shown in Figure 2, but high-order discharge orifice among the figure and low level discharge orifice have been extrusion stream;
Figure 15 is the partial enlarged drawing of differential type tail bank;
Figure 16 is the structural representation that forms the combinatorial surface unit I of differential type tail bank end face;
Figure 17 is the vertical view of Figure 16;
Figure 18 is the structural representation that forms the combinatorial surface unit II of differential type tail bank end face;
Figure 19 is the vertical view of Figure 18.
Among the figure, the high-order dredging flow groove of 1-or high-order discharge orifice, 2-low level dredging flow groove or low level discharge orifice, 3-absorption basin, 4-paste pin, 5-absorption basin tail bank, 6-protection-apron, dividing pier pier tail, 8-combinatorial surface unit I, 9-combinatorial surface unit II, L among the 7-
1-flow inlet section is at projected length, the L of horizontal plane
2-absorption basin length, L
3-subsides pin length, L
4-middle dividing pier pier tail length, B-absorption basin width, B
1-high-order dredging flow groove or high-order discharge orifice width, B
2-low level dredging flow groove or low level discharge orifice width, d
1-absorption basin base plate is to the distance on absorption basin tail bank top; d
2-protection-apron tail bank is to distance, the d on absorption basin tail bank top
3-high-order dredging flow groove or high-order discharge orifice outlet end fall bank height, d
4-low level dredging flow groove or low level discharge orifice outlet end fall bank height, d
5-middle dividing pier pier tail height, d
6Distance, the b of-middle dividing pier pier tail bottom and absorption basin base plate
1Length, the b of-combinatorial surface unit I
2Length, the H of-combinatorial surface unit II
1-nothing extrudes height, the H of the high-order dredging flow groove of fluid type exit dredging flow groove base plate to middle dividing pier top
2-nothing extrudes height, the H of fluid type low level dredging flow groove exit dredging flow groove base plate to middle dividing pier top
3-have to extrude fluid type low level discharge orifice height, H
4-have to extrude the high-order discharge orifice height of fluid type.
The specific embodiment
The structure of differential column-splitting inlet energy dissipater of the present invention is described further by embodiment below in conjunction with accompanying drawing.
Differential column-splitting inlet energy dissipater among embodiment 1 and the embodiment 2 is according to certain large hydropower station multi-purpose project design, and described Hydropower station pivotal engineering installation 6400MW adopts concrete gravity dam, maximum height of dam 161m.Described power station design flood (P=0.2%) flow 41200m
3/ s, check flood (P=0.02%) flow 49800m
3/ s, upstream and downstream maximum stage difference 120m lets out the about 40000MW of general power under the maximum.Maximum discharge per unit width is 225m in the absorption basin
2/ s, absorption basin go into the pond flow velocity and reach about 40m/s.
The structure of the differential column-splitting inlet energy dissipater in the present embodiment such as Fig. 1, Fig. 3, Fig. 4, shown in Figure 7, the absorption basin 3 that comprises the flow inlet section, joins with the flow inlet section, the protection-apron 6 that joins with absorption basin.The flow inlet section is made of high-order dredging flow groove 1 and low level dredging flow groove 2 alternately, and high-order dredging flow groove 1 is 4, and low level dredging flow groove 2 is 3, and high-order dredging flow groove 1 and low level dredging flow groove 2 are does not have the stream of extrusion, wide build.The boundary of falling bank and absorption basin base plate of high-order dredging flow groove 1 of flow inlet section and low level dredging flow groove 2 outlet ends is provided with pastes pin 4, described subsides pin 4 is the right angle wedge shape, the bottom surface of right angle wedge shape is positioned on the absorption basin base plate, and paste mutually with the bank that falls of high-order dredging flow groove 1 of flow inlet section and low level dredging flow groove 2 outlet ends the side perpendicular to the bottom surface in the right angle wedge shape.Absorption basin tail bank 5 is a differential type tail bank, its end face is formed alternately by two kinds of different combinatorial surface unit I 8 and combinatorial surface unit II 9 of structure, as shown in figure 15, combinatorial surface unit I 8 is made up of inclined-plane-plane-inclined-plane-plane successively, and it is higher than plane near protection-apron near plane of absorption basin, and (difference in height on two planes is d
2), as Figure 16, shown in Figure 17; Combinatorial surface unit II9 is made up of plane-inclined-plane-plane successively, and it is higher than plane near protection-apron near plane of absorption basin, and (difference in height on two planes is d
2), as Figure 18, shown in Figure 19.Middle dividing pier pier tail 7 between high-order dredging flow groove 1 and the low level dredging flow groove 2 is the streamlined pier tail of cantilevered, as Fig. 1, Fig. 3, shown in Figure 4.The relevant structural parameters of the described differential column-splitting inlet energy dissipater of present embodiment are as follows:
The flow inlet section is at the projected length L of horizontal plane
1Be 120m, the width B of high-order dredging flow groove 1
1Be 6m, low level dredging flow groove 2 width B
2Be 8m, the absorption basin length L
2Be 240m, the width B of absorption basin 3 is 108m, pastes the length L of pin 4
3Be 8m, the gradient of pasting pin 4 is 1: 1, high-order dredging flow groove 1 outlet end fall bank height d
3Be 16m, low level dredging flow groove 2 outlet ends fall bank height d
4Be 8m, high-order dredging flow groove 1 exit dredging flow groove base plate is to the height H on middle dividing pier top
1Be 22m, low level dredging flow groove 2 exit dredging flow groove base plates are to the height H on middle dividing pier top
2Be 30m.The thickness of middle dividing pier is 10m, the length L of pier tail
4Be 20m, the height d of pier tail
5Be 30m, its top with flush with middle dividing pier top, its bottom and absorption basin base plate apart from d
6Be 8m, the absorption basin base plate to absorption basin tail bank top apart from d
1Be 25m, protection-apron to absorption basin tail bank top apart from d
2Be 10m, the length b of combinatorial surface unit I 8
1Be 6m, the length b of combinatorial surface unit II 9
2Be 6m.
The structure of the differential column-splitting inlet energy dissipater in the present embodiment such as Fig. 2, Fig. 3, Fig. 5, shown in Figure 10, the absorption basin 3 that comprises the flow inlet section, joins with the flow inlet section, the protection-apron 6 that joins with absorption basin.The flow inlet section is made of high-order dredging flow groove 1 and low level discharge orifice 2 alternately, and high-order dredging flow groove 1 is 3, and low level discharge orifice 2 is 4, and high-order dredging flow groove 1 is not for having the stream of extrusion, wide build, and low level discharge orifice 2 is for having the stream of extrusion, wide build.The boundary of falling bank and absorption basin base plate of high-order dredging flow groove 1 of flow inlet section and low level discharge orifice 2 outlet ends is provided with pastes pin 4, described subsides pin 4 is the right angle wedge shape, the bottom surface of right angle wedge shape is positioned on the absorption basin base plate, and paste mutually with the bank that falls of high-order dredging flow groove 1 of flow inlet section and low level discharge orifice 2 outlet ends the side perpendicular to the bottom surface in the right angle wedge shape.Absorption basin tail bank 5 is a differential type tail bank, its end face is formed alternately by two kinds of different combinatorial surface unit I 8 and combinatorial surface unit II9 of structure, as shown in figure 15, combinatorial surface unit I 8 is made up of inclined-plane-plane-inclined-plane-plane successively, and it is higher than plane near protection-apron near plane of absorption basin, and (difference in height on two planes is d
2), as Figure 16, shown in Figure 17; Combinatorial surface unit II 9 is made up of plane-inclined-plane-plane successively, and it is higher than plane near protection-apron near plane of absorption basin, and (difference in height on two planes is d
2), as Figure 18, shown in Figure 19.Middle dividing pier pier tail 7 between high-order dredging flow groove 1 and the low level discharge orifice 2 is the streamlined pier tail of cantilevered, as Fig. 2, Fig. 3, shown in Figure 5.The relevant structural parameters of the described differential column-splitting inlet energy dissipater of present embodiment are as follows:
The flow inlet section is at the projected length L of horizontal plane
1Be 120m, the width B of high-order dredging flow groove 1
1Be 8m, low level discharge orifice 2 width B
2Be 10m, the absorption basin length L
2Be 228m, the width B of absorption basin 3 is 112m, pastes the length L of pin 4
3Be 15m, the gradient of pasting pin 4 is 1: 15, high-order dredging flow groove 1 outlet end fall bank height d
3Be 20m, low level discharge orifice 2 outlet ends fall bank height d
4Be 10m, high-order dredging flow groove exit dredging flow groove base plate is to the height H on middle dividing pier top
1Be 8m, low level discharge orifice 2 open height H
3Be 12m.The thickness of middle dividing pier is 8m, the length L of pier tail
4Be 12m, the height d of pier tail
5Be 18m, its top with flush with middle dividing pier top, its bottom and absorption basin base plate apart from d
6Be 10m, the absorption basin base plate to absorption basin tail bank top apart from d
1Be 25m, protection-apron to absorption basin tail bank top apart from d
2Be 12m, the length b of combinatorial surface unit I 8
1Be 4m, the length b of combinatorial surface unit II 9
2Be 8m.
Differential column-splitting inlet energy dissipater among embodiment 3 and the embodiment 4 is according to certain large hydropower station multi-purpose project design, and described certain engineering installed capacity of power station is 3000MW.Maximum height of dam 159m, described power station design flood (P=0.2%) flow 17000m
3/ s, check flood (P=0.02%) flow 21000m
3/ s, upstream and downstream maximum stage difference 120m lets out the about 40000MW of general power under the maximum.Maximum discharge per unit width is 185m in the absorption basin
2/ s, absorption basin go into the pond flow velocity and reach about 40m/s.
The structure of the differential column-splitting inlet energy dissipater in the present embodiment such as Fig. 2, Fig. 4, Fig. 6, shown in Figure 12, the absorption basin 3 that comprises the flow inlet section, joins with the flow inlet section, the protection-apron 6 that joins with absorption basin.The flow inlet section is made of high-order discharge orifice 1 and low level dredging flow groove 2 alternately, and high-order discharge orifice 1 is 3, and low level dredging flow groove 2 is 4, and high-order discharge orifice 1 is for having the stream of extrusion, wide build, and low level dredging flow groove 2 is not for having the stream of extrusion, wide build.The boundary of falling bank and absorption basin base plate of high-order discharge orifice 1 of flow inlet section and low level dredging flow groove 2 outlet ends is provided with pastes pin 4, described subsides pin 4 is the right angle wedge shape, the bottom surface of right angle wedge shape is positioned on the absorption basin base plate, and paste mutually with the bank that falls of high-order discharge orifice 1 of flow inlet section and low level dredging flow groove 2 outlet ends the side perpendicular to the bottom surface in the right angle wedge shape.Absorption basin tail bank 5 is a differential type tail bank, its end face is formed alternately by two kinds of different combinatorial surface unit I 8 and combinatorial surface unit II 9 of structure, as shown in figure 15, combinatorial surface unit I 8 is made up of inclined-plane-plane-inclined-plane-plane successively, and it is higher than plane near protection-apron near plane of absorption basin, and (difference in height on two planes is d
2), as Figure 16, shown in Figure 17; Combinatorial surface unit II 9 is made up of plane-inclined-plane-plane successively, and it is higher than plane near protection-apron near plane of absorption basin, and (difference in height on two planes is d
2), as Figure 18, shown in Figure 19.Middle dividing pier pier tail 7 between high-order discharge orifice 1 and the low level dredging flow groove 2 is the streamlined pier tail of cantilevered, as Fig. 2, Fig. 4, Fig. 6.The relevant structural parameters of the described differential column-splitting inlet energy dissipater of present embodiment are as follows:
The flow inlet section is at the projected length L of horizontal plane
1Be 110m, the width B of high-order discharge orifice 1
1Be 10m, low level dredging flow groove 2 width B
2Be 12m, the absorption basin length L
2Be 180m, the width B of absorption basin 3 is 114m, pastes the length L of pin 4
3Be 15m, the gradient of pasting pin 4 is 1: 1, high-order discharge orifice 1 outlet end fall bank height d
3Be 25m, low level dredging flow groove 2 outlet ends fall bank height d
4Be 15m, high-order discharge orifice 1 aperture height H
4Be 15m, low level dredging flow groove 2 exit dredging flow groove base plates are to the height H on middle dividing pier top
2Be 30m.The thickness of middle dividing pier is 6m, the length L of pier tail
4Be 9m, the height d of pier tail
5Be 25m, its top with flush with middle dividing pier top, its bottom and absorption basin base plate apart from d
6Be 15m, the absorption basin base plate to absorption basin tail bank top apart from d
1Be 20m, protection-apron to absorption basin tail bank top apart from d
2Be 10m, the length b of combinatorial surface unit I 8
1Be 3m, the length b of combinatorial surface unit II9
2Be 9m.
The structure of the differential column-splitting inlet energy dissipater in the present embodiment such as Fig. 1, Fig. 5, Fig. 6, shown in Figure 13, the absorption basin 3 that comprises the flow inlet section, joins with the flow inlet section, the protection-apron 6 that joins with absorption basin.The flow inlet section is made of high-order discharge orifice 1 and low level discharge orifice 2 alternately, and high-order discharge orifice 1 is 4, and low level discharge orifice 2 is 3, and high-order discharge orifice 1 and low level discharge orifice 2 have been and have extruded stream, wide build.The boundary of falling bank and absorption basin base plate of high-order discharge orifice 1 of flow inlet section and low level discharge orifice 2 outlet ends is provided with pastes pin 4, described subsides pin 4 is the right angle wedge shape, the bottom surface of right angle wedge shape is positioned on the absorption basin base plate, and paste mutually with the bank that falls of high-order discharge orifice 1 of flow inlet section and low level discharge orifice 2 outlet ends the side perpendicular to the bottom surface in the right angle wedge shape.Absorption basin tail bank 5 is a differential type tail bank, its end face is formed alternately by two kinds of different combinatorial surface unit I 8 and combinatorial surface unit II9 of structure, as shown in figure 15, combinatorial surface unit I 8 is made up of inclined-plane-plane-inclined-plane-plane successively, and it is higher than plane near protection-apron near plane of absorption basin, and (difference in height on two planes is d
2), as Figure 16, shown in Figure 17; Combinatorial surface unit II 9 is made up of plane-inclined-plane-plane successively, and it is higher than plane near protection-apron near plane of absorption basin, and (difference in height on two planes is d
2), as Figure 18, shown in Figure 19.Middle dividing pier pier tail 7 between high-order discharge orifice 1 and the low level discharge orifice 2 is the streamlined pier tail of cantilevered, as Fig. 1, Fig. 5, shown in Figure 6.The relevant structural parameters of the described differential column-splitting inlet energy dissipater of present embodiment are as follows:
The flow inlet section is at the projected length L of horizontal plane
1Be 110m, the width B of high-order discharge orifice 1
1Be 12m, low level discharge orifice 2 width B
2Be 14m, the absorption basin length L
2Be 180m, the width B of absorption basin 3 is 114m, pastes the length L of pin 4
3Be 15m, the gradient of pasting pin 4 is 1: 15, high-order dredging flow groove 1 outlet end fall bank height d
3Be 23m, low level dredging flow groove 2 outlet ends fall bank height d
4Be 12m, high-order discharge orifice height H
4Be 8m, low level discharge orifice height H
3Be 19m.The thickness of middle dividing pier is 4m, the length L of pier tail
4Be 8m, the height d of pier tail
5Be 30m, its top with flush with middle dividing pier top, its bottom and absorption basin base plate apart from d
6Be 12m, the absorption basin base plate to absorption basin tail bank top apart from d
1Be 20m, protection-apron to absorption basin tail bank top apart from d
2Be 12m, the length b of combinatorial surface unit I 8
1Be 8m, the length b of combinatorial surface unit II 9
2Be 10m.
Experimental result shows, the column-splitting inlet energy dissipater of the described structure of present embodiment all can make silt particle no longer be deposited on the boundary of falling bank and absorption basin base plate of the high-order dredging flow groove of flow inlet section or discharge orifice and low level dredging flow groove or discharge orifice outlet end, dividing pier is reduced the erosion damage of current to downstream river course by cavitation and cavitation erosion in avoiding.
Claims (7)
1, a kind of differential column-splitting inlet energy dissipater, the absorption basin (3) that comprises the flow inlet section, joins with the flow inlet section, the protection-apron (6) that joins with absorption basin, the flow inlet section is made of alternately high-order dredging flow groove or high-order discharge orifice (1) and low level dredging flow groove or low level discharge orifice (2), it is characterized in that:
The boundary of falling bank and absorption basin base plate of the high-order dredging flow groove of flow inlet section or high-order discharge orifice (1) and low level dredging flow groove or low level discharge orifice (2) outlet end is provided with pastes pin (4), described subsides pin (4) is the right angle wedge shape, the bottom surface of right angle wedge shape is positioned on the absorption basin base plate, and paste mutually with the bank that falls of the high-order dredging flow groove of flow inlet section or high-order discharge orifice (1) and low level dredging flow groove or low level discharge orifice (2) outlet end the side perpendicular to the bottom surface in the right angle wedge shape;
Absorption basin tail bank (5) is a differential type tail bank, described differential type tail bank, and its end face is formed alternately by two kinds of different combinatorial surface unit I (8) and combinatorial surface unit II (9) of structure;
Middle dividing pier pier tail (7) between high-order dredging flow groove or high-order discharge orifice (1) and low level dredging flow groove or the low level discharge orifice (2) is the streamlined pier tail of cantilevered.
2, differential column-splitting inlet energy dissipater according to claim 1, the gradient i that it is characterized in that pasting pin (5) is 1: 1～1: 15, length d
4≤ L
3＜d
3, described d
3Fall bank height, d for high-order dredging flow groove of flow inlet section or high-order discharge orifice outlet end
4Fall the bank height for flow inlet section low level dredging flow groove or low level discharge orifice outlet end.
3, differential column-splitting inlet energy dissipater according to claim 1 and 2 is characterized in that the combinatorial surface unit I (8) that forms differential type tail bank end face is made up of inclined-plane-plane-inclined-plane-plane successively, and its plane near absorption basin is higher than the plane near protection-apron; The combinatorial surface unit II (9) that forms differential type tail bank end face is made up of plane-inclined-plane-plane successively, and its plane near absorption basin is higher than the plane near protection-apron.
4, differential column-splitting inlet energy dissipater according to claim 3 is characterized in that the length b of described combinatorial surface unit I (8)
1Length b with combinatorial surface unit II (9)
2Ratio b
1: b
2=1: 1～1: 3.
5, differential column-splitting inlet energy dissipater according to claim 1 and 2, it is characterized in that described in the length L of dividing pier pier tail (7)
4Be 1.5～2 times of middle dividing pier thickness, its top with flush with middle dividing pier top, its bottom with the absorption basin base plate apart from d
4=d
6＜d
3, described d
3Fall bank height, d for high-order dredging flow groove of flow inlet section or high-order discharge orifice outlet end
4Fall the bank height for flow inlet section low level dredging flow groove or low level discharge orifice outlet end.
6, differential column-splitting inlet energy dissipater according to claim 3, it is characterized in that described in the length L of dividing pier pier tail (7)
4Be 1.5～2 times of middle dividing pier thickness, its top with flush with middle dividing pier top, its bottom with the absorption basin base plate apart from d
4=d
6＜d
3, described d
3Fall bank height, d for high-order dredging flow groove of flow inlet section or high-order discharge orifice outlet end
4Fall the bank height for flow inlet section low level dredging flow groove or low level discharge orifice outlet end.
7, differential column-splitting inlet energy dissipater according to claim 4, it is characterized in that described in the length L of dividing pier pier tail (7)
4Be 1.5～2 times of middle dividing pier thickness, its top with flush with middle dividing pier top, its bottom with the absorption basin base plate apart from d
4=d
6＜d
3, described d
3Fall bank height, d for high-order dredging flow groove of flow inlet section or high-order discharge orifice outlet end
4Fall the bank height for flow inlet section low level dredging flow groove or low level discharge orifice outlet end.
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| CN101831891A (en) * | 2010-04-08 | 2010-09-15 | 重庆交通大学 | Hydropower station bank slope and stilling pool combined energy dissipation method |
| CN102966081A (en) * | 2012-11-13 | 2013-03-13 | 中国长江三峡集团公司 | Biological environment-friendly expansion-drop combination energy dissipater |
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| CN103437331B (en) * | 2013-09-04 | 2015-08-12 | 四川大学 | Vibration damping subtracts quick-fried column-splitting inlet energy dissipater |
| CN103437331A (en) * | 2013-09-04 | 2013-12-11 | 四川大学 | Vibration and explosion reducing array type inlet energy dissipater |
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