CN103981878A - Earth-rock overflow cofferdam guard board with tilt bank - Google Patents
Earth-rock overflow cofferdam guard board with tilt bank Download PDFInfo
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- CN103981878A CN103981878A CN201410222431.2A CN201410222431A CN103981878A CN 103981878 A CN103981878 A CN 103981878A CN 201410222431 A CN201410222431 A CN 201410222431A CN 103981878 A CN103981878 A CN 103981878A
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- bank
- base plate
- face
- overflow cofferdam
- native stone
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Abstract
The invention provides an earth-rock overflow cofferdam guard board with a tilt bank. The earth-rock overflow cofferdam guard board with the tilt bank comprises a bottom board, the bottom board is a rectangular flat board, and the tail portion of the top surface of the bottom board is provided with the tilt bank which is of an integrated structure with the bottom board; the tilt bank is a wedge-shaped block, the upper top surface of the tilt bank is an inclined surface, both side surfaces of the tilt bank are right triangular surfaces which are parallel to each other, and the rear end surface of the tilt bank is in a rectangular shape and extends out of the end surface of the tail portion of the bottom board; the bottom surface of the portion of the wedge-shaped block, which extends out of the end surface of the tail portion of the bottom board, forms a connecting interface together with the end surface of the tail portion of the bottom board. During application of the earth-rock overflow cofferdam guard board with the tilt bank, the top surface of the bottom board and the upper top surface of the tilt bank serve as an overflow surface, so that the downward stable force acted by water flow onto a next-stage guard board can be enhanced, the stability of the surface of an earth-rock overflow cofferdam can be enhanced, and flood discharge safety can be guaranteed.
Description
Technical field
The invention belongs to hydraulic engineering technical field, relate to a kind of native stone overflow cofferdam wedge guard.
Background technology
In hydraulic engineering, the excessive flood of native stone overflow cofferdam participation can reduce the scale of diversion structure, can reduce construction costs, reduction of erection time.Adopt earth rock cofferdam overcurrent to gather materials on the spot, while solving by annual dash design, engineering quantity is large, the problem of water conservancy project difficult arrangement, is mountain stream diversion mode comparatively economically and reasonably.
As interim hydraulic structure, the erosion resistibility of native stone overflow cofferdam a little less than, once when flood weir face or the part of weir pin is rushed to open breach, inserts is drawn, and finally may cause the weir accident of bursting that overflows.For this reason, be necessary to seek to protect the ground surface protection structure of native stone overflow cofferdam, to ensure the stable and safety of native stone overflow cofferdam.The form of the mask of the native stone overflow cofferdam adopting in engineering at present has piece stone mask, galvanized wire cage mask, concrete slab pavement etc., wherein, wedge shape concrete shield is mask form preferably, its flow-passing surface is plane, backplate is ladder-like arranged in the side slope of native stone overflow cofferdam, the head of next stage backplate is crushed on below the afterbody of upper level backplate, is mutually connected.But because the flow-passing surface of existing wedge guard is plane, current flow through wedge guard fall bank time, the flow direction of current is basically parallel to the flow-passing surface of wedge guard, thereby flow action is poor in the pressure result of next stage backplate, in addition, the flow-passing surface that flow direction is basically parallel to wedge guard also can make wedge guard easily along native stone overflow cofferdam down sliding, cause its poor stability on native stone overflow cofferdam, may cause native stone overflow cofferdam to cave in and backplate is unstable, thereby have a strong impact on construction, danger side of body downstream safety, the problems referred to above show particularly evidently in the time of little flood operating mode.
Summary of the invention
The object of the invention is to overcome the deficiency that existing native stone overflow cofferdam wedge guard exists, provide a kind of band to choose the native stone overflow cofferdam backplate of pressing bank, this kind of backplate can increase flow action in the downward stability force of next stage backplate, increase the stability of native stone overflow cofferdam weir face, ensure the big vast safety of overflowing.
Band provided by the invention is chosen the native stone overflow cofferdam backplate of pressing bank, comprise base plate, described base plate is rectangular flat, the afterbody of plate top surface is provided with base plate is integrated and chooses pressure bank, described choose press bank be wedge block, on it, end face is that inclined-plane, two sides are the right-angled triangle being parallel to each other, and rear end face is rectangle and extends to outside base plate tail end face, and bottom surface and base plate tail end face that described wedge block is positioned at the outer portion part of base plate tail end face form seam.
In technique scheme, described in choose the height H of pressing bank rear end face
k=0.4～0.7m.
In technique scheme, described in choose the length of pressing end face on bank
in formula, n is the gradient of native stone overflow cofferdam weir face, H
kfor choosing the height of pressing bank rear end face.
In technique scheme, the length W=0.2～0.4m of described seam.
In technique scheme, described in choose and press the width b of bank identical with the width of base plate, the width of base plate is 4～6m.
In technique scheme, the length of described base plate should make water body through just in time acting on the centroid position of next stage backplate, the conventionally length L=8～12m of base plate after choosing the stream effect of choosing of pressure bank.
In technique scheme, the thickness d of base plate is 0.8～1.2m.
Band described in technique scheme choose press bank native stone overflow cofferdam backplate in use, the end face of base plate and choose that to press the upper end face of bank be flow-passing surface.
In technique scheme, described backplate is by concrete for making.
Compared with prior art, the present invention has with useful technique effect:
1. the invention provides a kind of native stone overflow cofferdam backplate of new structure, choose pressure bank afterbody being provided with of plate top surface, when water body is flowed through backplate, owing to choosing the stream effect of choosing of pressing bank, the flow direction of water body changes, and flows to the backplate of next stage with the form of impelling stream, and this has increased flow action in the downward stability force of next stage backplate, thereby increase the stability of native stone overflow cofferdam weir face, be more conducive to ensure the big vast safety of overflowing.
2. because backplate is chosen the stream effect of choosing of pressing bank, flow action in the position of next stage backplate close to the centroid position of backplate, can reduce so the unfavorable moment of flexure that current produce next stage backplate, thereby avoid backplate to rotate with respect to barycenter, be conducive to increase the stability of backplate on native stone overflow cofferdam.
3. backplate is chosen and is pressed the stream effect of choosing of bank not only can improve flow-shape, and choose stream and can increase contacting of current and air, the effect of energy dissipating has also been played in current and windage, this is conducive to alleviate the impact failure of current to downstream mask and native stone overflow cofferdam weir pin, avoids occurring the weir accident of bursting.
4. band of the present invention is chosen and is pressed the native stone overflow cofferdam backplate of bank to be suitable for the native stone overflow cofferdam on mountain stream, particularly, in the time of little flood operating mode, can improve earth rock cofferdam and participate in the big vast safety of overflowing.
5. band of the present invention is chosen native stone overflow cofferdam backplate simple in structure of pressing bank, is easy to make, and is conducive to apply.
Brief description of the drawings
Fig. 1 is the structural representation that band of the present invention is chosen the native stone overflow cofferdam backplate of pressing bank;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is that band of the present invention is chosen and pressed the native stone overflow cofferdam backplate of the bank scheme of installation on native stone overflow cofferdam;
Fig. 4 is that band of the present invention is chosen the flow-shape schematic diagram on the native stone overflow cofferdam backplate of pressing bank;
Fig. 5 is the flow-shape schematic diagram on existing wedge shape soil stone overflow cofferdam backplate;
In figure, 1-base plate, 2-choose and press bank, 3-seam, top, 4-cofferdam, 5-backplate, 6-energy dissipating platform, 7-foundation ditch, n-weir face gradient, W-seam length, H
k-choose and press bank rear end face height, L
k-choose and press end face length on bank, b-choose and press bank width, d-base plate thickness.
Detailed description of the invention
By the following examples and by reference to the accompanying drawings; band of the present invention is chosen and pressed the native stone overflow cofferdam of bank to be described further; but given embodiment should not be understood as any restriction to protection domain of the present invention, thereby the nonessential improvement made according to the content of the invention described above and design philosophy of professional and technical personnel and adjust and also should belong to protection scope of the present invention.
Embodiment 1
In the present embodiment, described band choose press bank native stone overflow cofferdam backplate structure as shown in Figure 1 and Figure 2, when use, be arranged on the native stone overflow cofferdam weir face of weir face gradient n=1:4.5.
Described in the present embodiment, band is chosen the native stone overflow cofferdam backplate of pressing bank, comprise base plate 1, described base plate is rectangular flat, length L=the 8m of base plate, baseplate width is 4.0m, base plate thickness d=0.8m, the afterbody of plate top surface be provided with base plate be integrated choose press bank 2, described choosing presses bank 2 for wedge block, on it, end face is inclined-plane, two sides are the right-angled triangle being parallel to each other, rear end face is rectangle and extends to outside base plate tail end face, bottom surface and base plate tail end face that described wedge block is positioned at the outer portion part of base plate tail end face form seam 3, the length W=0.2m of seam.
The described height H of pressing bank 2 rear end faces of choosing
k=0.4m, chooses the length of pressing end face on bank 2
N is the gradient of native stone overflow cofferdam weir face, H
kfor choosing the height of pressing bank rear end face, choose the width b=4.0m that presses bank.
Above-mentioned backplate adopts concreting to form, the mounting means of backplate of the present invention on native stone overflow cofferdam is shown in Fig. 3, backplates 5 at different levels are ladder-like arranged on the face of the weir of native stone overflow cofferdam, and the head of next stage backplate is arranged in the seam of upper level backplate afterbody, are mutually connected.
Fig. 5 is shown in by flow-shape schematic diagram on existing wedge shape soil stone overflow cofferdam backplate, when water body is flowed through existing wedge guard, the flow direction of current is basically parallel to the flow-passing surface of wedge guard, current almost do not have downward stabilization to next stage wedge guard, cause the easy unstability of wedge guard, be unfavorable for the stable of wedge guard entirety on native stone overflow cofferdam, particularly in the time of little flood operating mode, be difficult to ensure the safety flood that overflows.Fig. 4 is shown in by the flow-shape schematic diagram that band of the present invention is chosen on the backplate of pressing bank, the end face of backplate 5 base plates and choose that to press the upper end face of bank be flow-passing surface, water body from the flow-passing surface of base plate arrive choose press bank end face, press the choosing under stream effect of bank choosing, the flow direction of water body changes, water body flows to the backplate of next stage with the form of impelling stream, and flow action is the centroid position close to backplate just in time in the position of next stage backplate, this has increased the downward stability force of flow action next stage backplate on the one hand, reduce on the other hand the unfavorable moment of flexure that current produce next stage backplate, avoid backplate to rotate with respect to barycenter, increase the stability of backplate on native stone overflow cofferdam.In addition, choose and press the stream effect of choosing of bank can increase contacting of current and air, the effect of energy dissipating has also been played in current and windage, and this is conducive to alleviate the impact failure of current to downstream mask and native stone overflow cofferdam weir pin, avoids occurring routed weir accident.
Embodiment 2
In the present embodiment, described band choose press bank native stone overflow cofferdam backplate structure as shown in Figure 1 and Figure 2, when use, be arranged on the native stone overflow cofferdam weir face of weir face gradient n=1:4.8.
Described in the present embodiment, band is chosen the native stone overflow cofferdam backplate of pressing bank, comprise base plate 1, described base plate is rectangular flat, length L=the 10m of base plate, baseplate width is 5.0m, base plate thickness d=1.0m, the afterbody of plate top surface be provided with base plate be integrated choose press bank 2, described choosing presses bank 2 for wedge block, on it, end face is inclined-plane, two sides are the right-angled triangle being parallel to each other, rear end face is rectangle and extends to outside base plate tail end face, bottom surface and base plate tail end face that described wedge block is positioned at the outer portion part of base plate tail end face form seam 3, the length W=0.3m of seam.
The described height H of pressing bank 2 rear end faces of choosing
k=0.5m, chooses the length of pressing end face on bank 2
N is the gradient of native stone overflow cofferdam weir face, H
kfor choosing the height of pressing bank rear end face, choose the width b=5.0m that presses bank.
Embodiment 3
In the present embodiment, described band choose press bank native stone overflow cofferdam backplate structure as shown in Figure 1 and Figure 2, when use, be arranged on the native stone overflow cofferdam weir face of weir face gradient n=1:4.0.
Described in the present embodiment, band is chosen the native stone overflow cofferdam backplate of pressing bank, comprise base plate 1, described base plate is rectangular flat, length L=the 12m of base plate, baseplate width is 6.0m, base plate thickness d=1.2m, the afterbody of plate top surface be provided with base plate be integrated choose press bank 2, described choosing presses bank 2 for wedge block, on it, end face is inclined-plane, two sides are the right-angled triangle being parallel to each other, rear end face is rectangle and extends to outside base plate tail end face, bottom surface and base plate tail end face that described wedge block is positioned at the outer portion part of base plate tail end face form seam 3, the length W=0.4m of seam.
The described height H of pressing bank 2 rear end faces of choosing
k=0.7m, chooses the length of pressing end face on bank 2
N is the gradient of native stone overflow cofferdam weir face, H
kfor choosing the height of pressing bank rear end face, choose the width b=6.0m that presses bank.
Claims (10)
1. a band is chosen the native stone overflow cofferdam backplate of pressing bank, comprise base plate (1), it is characterized in that described base plate is rectangular flat, the afterbody of plate top surface be provided with base plate be integrated choose press bank (2), described choosing presses bank (2) for wedge block, on it, end face is that inclined-plane, two sides are the right-angled triangle being parallel to each other, rear end face is rectangle and extends to outside base plate tail end face, and bottom surface and base plate tail end face that described wedge block is positioned at the outer portion part of base plate tail end face form seam (3).
2. band is chosen the native stone overflow cofferdam backplate of pressing bank according to claim 1, chooses the height H of pressing bank (2) rear end face described in it is characterized in that
k=0.4～0.7m.
3. band is chosen the native stone overflow cofferdam backplate of pressing bank according to claim 2, chooses the length of pressing the upper end face of bank (2) described in it is characterized in that
in formula, n is the gradient of native stone overflow cofferdam weir face, H
kfor choosing the height of pressing bank rear end face.
4. choose the native stone overflow cofferdam of pressing bank according to the band described in arbitrary claim in claims 1 to 3, it is characterized in that the length W=0.2～0.4m of described seam (3).
5. choose the native stone overflow cofferdam of pressing bank according to the band described in arbitrary claim in claims 1 to 3, choose and press the width (b) of bank identical with the width of base plate described in it is characterized in that, the width of base plate is 4～6m.
6. band according to claim 4 is chosen the native stone overflow cofferdam of pressing bank, chooses and press the width (b) of bank identical with the width of base plate described in it is characterized in that, the width of base plate is 4～6m.
7. choose the native stone overflow cofferdam of pressing bank according to the band described in arbitrary claim in claims 1 to 3, it is characterized in that the length L=8～12m of described base plate.
8. band according to claim 4 is chosen the native stone overflow cofferdam of pressing bank, it is characterized in that the length L=8～12m of described base plate.
9. band according to claim 5 is chosen the native stone overflow cofferdam of pressing bank, it is characterized in that the length L=8～12m of described base plate.
10. band according to claim 6 is chosen the native stone overflow cofferdam of pressing bank, it is characterized in that the length L=8～12m of described base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410222431.2A CN103981878B (en) | 2014-05-23 | 2014-05-23 | The soil and rock construction backplate of pressure bank chosen by a kind of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410222431.2A CN103981878B (en) | 2014-05-23 | 2014-05-23 | The soil and rock construction backplate of pressure bank chosen by a kind of band |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103981878A true CN103981878A (en) | 2014-08-13 |
| CN103981878B CN103981878B (en) | 2016-04-13 |
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ID=51274030
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410222431.2A Expired - Fee Related CN103981878B (en) | 2014-05-23 | 2014-05-23 | The soil and rock construction backplate of pressure bank chosen by a kind of band |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5639225A (en) * | 1979-09-08 | 1981-04-14 | Marushima Suimon Seisakusho:Kk | Energy dissipator |
| CN101603302A (en) * | 2009-07-03 | 2009-12-16 | 水利部交通部电力工业部南京水利科学研究院 | Deduction and exemption high-lift lock sudden expansion gallery rises the natural ventilation method of bank cavitation |
| CN102966082A (en) * | 2012-12-11 | 2013-03-13 | 中国水电顾问集团西北勘测设计研究院 | Aeration facility with downward-bent base slab |
| CN103266584A (en) * | 2013-06-05 | 2013-08-28 | 中国水利水电第七工程局有限公司 | Novel water conservancy project energy dissipater structure |
-
2014
- 2014-05-23 CN CN201410222431.2A patent/CN103981878B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5639225A (en) * | 1979-09-08 | 1981-04-14 | Marushima Suimon Seisakusho:Kk | Energy dissipator |
| CN101603302A (en) * | 2009-07-03 | 2009-12-16 | 水利部交通部电力工业部南京水利科学研究院 | Deduction and exemption high-lift lock sudden expansion gallery rises the natural ventilation method of bank cavitation |
| CN102966082A (en) * | 2012-12-11 | 2013-03-13 | 中国水电顾问集团西北勘测设计研究院 | Aeration facility with downward-bent base slab |
| CN103266584A (en) * | 2013-06-05 | 2013-08-28 | 中国水利水电第七工程局有限公司 | Novel water conservancy project energy dissipater structure |
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| CN103981878B (en) | 2016-04-13 |
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Granted publication date: 20160413 Termination date: 20170523 |
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