CN104264623A - Stone blocking grate type three-dimensional roughening method for damming - Google Patents
Stone blocking grate type three-dimensional roughening method for damming Download PDFInfo
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- CN104264623A CN104264623A CN201410443033.3A CN201410443033A CN104264623A CN 104264623 A CN104264623 A CN 104264623A CN 201410443033 A CN201410443033 A CN 201410443033A CN 104264623 A CN104264623 A CN 104264623A
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
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Abstract
The invention provides a stone blocking grate type three-dimensional roughening method for damming. According to the stone blocking grate type three-dimensional roughening method for damming, a stone blocking grate is arranged at the downstream position along a berm in a damming colure gap area and prevents damming materials from running off, the stone blocking grate is an array structure composed of multiple stone blocking piles, the height of the stone blocking grate is 0.4 to 0.8 time that of the berm. According to the optimal arrangement mode of the array structure composed of the multiple stone blocking piles, any one of every two adjacent columns of stone blocking piles are arranged at the positions corresponding to the centers of gaps between the stone blocking piles of the other column, any one of every two adjacent rows of stone blocking piles are arranged at the positions corresponding to the centers of gaps between the stone blocking piles of the other row. By the adoption of the stone blocking grate type three-dimensional roughening method for damming, the wastage rate of the damming materials can be reduced during closure of a high-difficulty damming closure gap, the economical efficiency of a damming project is improved, the flow speed, the fall and the unit stream energy of the closure gap are reduced, and the safety of damming and successful damming are guaranteed.
Description
Technical field
The invention belongs to the stopped flow technique field in Hydraulic and Hydro-Power Engineering, particularly one is dammed for river course and River Engineering, and the solid that hydraulic indexes is higher and dam in Longkou adds rough method.
Background technology
In River Engineering, particularly hydraulic engineering construction, damming is the key link of engineering construction, and the highly difficult most important thing especially of damming.Generally, the highly difficult discriminant criterion dammed is: high flow rate (flow velocity is greater than 6m/s), large drop (drop is greater than 6m), large unit stream energy (unit stream energy is greater than 80tm/ (ms)).For the engineering of single index exceeding standard 5% ~ 10%, dam though broken line described in patent CN201010129949.3 can be adopted to clash dike.But after entering Longkou section, especially after dike is turned in an opposite direction, Longkou forms ' S ' shape current, wash away seriously to clashing dike downstream toe, dike downstream bank slope very easily caves in an opposite direction.Superelevation is dammed hydraulic indexes, namely flow velocity is greater than 8m/s, and drop is greater than 10m, and unit stream energy is greater than the larger dam project of the difficulty of 120tm/ (ms), then need to let out in conjunction with the control of power station, upstream to dam, but the traffic control of whole basin electrical network can be had influence on.During regulating and controlling and during Longkou closure of damming, require that intensity of jettisoninging is very high, need the artificial cut-off material quantity of use many, therefore not only cost is high, difficulty of construction is large, and cut-off material turnover rate within this period is large, dike dike head easily caves under flow action in an opposite direction, threatens the safety of constructor and plant equipment, the dangerous of failure of damming.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, there is provided one to dam and add rough method with blocking stone grating solid, to reduce the turnover rate of cut-off material during highly difficult Longkou of damming joins the two sections of a bridge, etc, improve the economy of dam project, reduce closures current flow velocity, drop and unit stream energy simultaneously, ensure the safety and successfully damming of damming.
Of the present invention damming adds rough method with blocking stone grating solid, block stone grid and carry out solid by arranging along dike downstream in an opposite direction at the Longkou section of damming and add rough, to reduce closures current flow velocity, drop and unit stream energy, stop the loss of cut-off material, the described stone grid that block are the many array structures blocking stone mar composition, block stone grid height=(0.4 ~ 0.8) dike height in an opposite direction.
Above-mentioned damming adds rough method with blocking stone grating solid, the described stone mar that blocks can have multiple arrangement, but consider from construction and reduction cut-off material turnover rate, the many preferred quincuncial pile formulas of arrangement mode of blocking the array structure of stone mar composition arrange, that is: the stone mar that respectively blocks that adjacent two row block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively, and the stone mar that respectively blocks that adjacent two rows block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively.
Above-mentioned damming adds rough method with blocking stone grating solid, many column pitch m=(0.5 ~ 3) D blocking the array structure of stone mar composition
50, in each row, adjacent spacing n=(0.75 ~ 2) D blocked between stone mar
50, wherein, D
50for the median particle diameter of cut-off material.Each column pitch of described array structure can equally also can not wait; When the median particle diameter of cut-off material is less, in each row, adjacent spacing of blocking between stone mar should be selected near lower limit, to reach the object reducing cut-off material turnover rate and reduce Longkou hydraulic parameter.
Above-mentioned damming adds rough method with blocking stone grating solid, for ensureing the turnover rate reducing cut-off material, reduce Longkou hydraulic parameter, consider engineering economy simultaneously, the many columns blocking the array structure of stone mar composition are 2 ~ 7 row, and row should make each row position of blocking residing for stone mar not surmount the width of Longkou.
Above-mentioned damming adds rough method with blocking stone grating solid, and blocking stone mar can be various shape and material, considers construction requirement, preferably can mix steel pipe pile and concrete pile.When for steel pipe pile, its cross section is annular, and the outer radius of circular ring section is 0.1 ~ 1m; When for concrete pile, its cross section is circular or rectangle, when cross section be circle, and its radius R=0.5 ~ 3m, when cross section is rectangle, ratio a:b=1:(0.8 ~ 1.25 of its length a and width b), wherein b=0.5 ~ 3m.Each stake designs according to dam flow condition and design specifications of each engineering, keeps stake can not destroy after be subject to damming water impact and material clash into.
Along with dike propelling in an opposite direction when damming, Longkou constriction, enters region, Longkou, and water drop increases, and flow velocity increases, and cut-off material turnover rate increases.Adopt the method for the invention, block within the scope of stone grid when in an opposite direction dike is advanced into, namely Longkou drop is divided into: in an opposite direction drop and drop after blocking stone grid in an opposite direction after dike before and after dike, blocks stone grid and plays harmony height Longkou up-stream face, reduces closures current flow velocity and drop, interception cut-off material, improves the safety of dam project and the effect of economy.
The present invention has following beneficial effect:
1, stone grid are blocked because the method for the invention to be provided with along dike downstream in an opposite direction at the Longkou section of damming, and to blocking the height of stone grid, arrangement mode has carried out appropriate design, thus in superelevation difficulty dam project, (flow velocity is greater than 8m/s, drop is greater than 10m, unit stream energy is greater than in the river enclosure process of 120tm/ (ms), effectively can not only stop the loss of cut-off material, reduce the cut-off material side of getting the raw materials ready amount, and closures current flow velocity can be reduced, drop and unit stream energy, shorten the closure time, guarantee is dammed safety and successfully damming, experiment shows, in during closure, Longkou average current flow velocity reduces 15% ~ 20%, the maximum unit stream energy in Longkou reduces 35% ~ 40%, the total turnover rate of cut-off material reduces to reach 70.5% ~ 96.4%.
2, due to the method for the invention the material blocking stone mar of stone grid is blocked to composition, shape and size have carried out choose reasonable, thus in use mechanical performance meets the requirements, and ensure that the realization of blocking stone grid function.
3, the method for the invention is applicable to the Longkou of various landform, can make full use of to bury underground dry season to block stone mar, and easily, method is simple, practical in construction.
Accompanying drawing explanation
Fig. 1 arranges along clashing dike downstream the schematic diagram blocking stone grid at the Longkou section that dams according to the method for the invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Fig. 4 is the arrangement figure blocking stone grid that the array structure of stone mar composition is blocked in square-section.
Fig. 5 is the arrangement figure blocking stone grid that circular cross-section blocks the array structure of stone mar composition.
Fig. 6 is the top view that stone mar is blocked in square-section.
Fig. 7 is that circular cross-section blocks stone mar top view.
In figure, 1---riverbank or lead wall, 2---be dike in an opposite direction, 3---block stone grid, 4---river bed, 5---water surface curve, 6---Longkou of damming, 7---block stone mar, the column pitch blocking stone grid of l---array structure, n---block adjacent spacing of blocking between stone mar in each row of stone grid, R-cross section is the radius that circular concrete blocks stone mar, a-cross section is the length that the concrete of rectangle blocks stone mar, and b-cross section is that the concrete of rectangle blocks stone mar width.
Detailed description of the invention
Below by embodiment, of the present invention damming is added rough method be described further with blocking stone grating solid.
The project profile of embodiment 1, embodiment 2, embodiment 3 and comparative example 1 is as follows:
Certain power station adopts stage diversion, and its three phase diversion canal floor elevation 982m, overflow weir crest level 994m, both reach 12m at the discrepancy in elevation, closure discharge 650m
3/ s, when three phases dammed, needs Longkou to join the two sections of a bridge, etc certain limit, reservoir level heap soil or fertilizer over and around the roots up to after overflow weir elevation of weir crest, overflow weir competence exertion shunting action.Simultaneously engineering is dammed and is subject to the influence of topography, unconditionally arranges two dike in an opposite direction, and cause flow rate of water flow to reach 10.01m/s, drop reaches 240tm/ (ms) up to 7.6m, unit stream energy, closure difficulty is larger.
For above-mentioned engineering, carry out the simulated test of damming of embodiment 1, embodiment 2, embodiment 3 and comparative example 1.
Embodiment 1
The present embodiment is clashed dike 2 downstream and is led wall 1 perpendicular to open channel and block stone grid 3 apart from leading within the scope of wall 50m to arrange on section edge, Longkou 6 of damming, the described stone grid that block are the many array structures blocking stone mar 7 and form, dike height 20m in an opposite direction, blocks stone grid height=0.8 times and clashes dike height=16m.The many arrangement modes blocking the array structure that stone mar 7 forms are: the stone mar that respectively blocks that adjacent two row block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively, and the stone mar that respectively blocks that adjacent two rows block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively.The columns of described array structure is 7 row, the median particle diameter D of cut-off material
50=2.0m, column pitch l=0.5D
50=1m, the adjacent spacing n=0.75D blocked between stone mar 7 in each row
50=1.5m.The described stone mar 7 that blocks is for steel pipe pile, and its cross section is annular, and the outer radius of circular ring section is 0.1m.
Result of the test: when Longkou width is 50m, dam to enter and block stone grid scope, after entering this section, closure difficulty obviously reduces, now clash water drop before and after dike to reduce, main drop concentrates on and blocks before and after stone Gate, Longkou maximum flow of water flow velocity is 7.65m/s, before and after dike, drop is 4.92m in an opposite direction, blocking drop before and after stone grid is 2.43m, unit stream energy maximum value is 168tm/ (ms), under this flow, the total turnover rate of its cut-off material is only 2.54%, artificial cut-off material without stream, 5.69 ten thousand sides that get the raw materials ready of damming.
Embodiment 2
The present embodiment is led wall along dike 2 downstream in an opposite direction perpendicular to open channel at Longkou 6 section of damming and is blocked stone grid 3 apart from leading within the scope of wall 50m to arrange, described in block stone grid be the many array structures blocking stone mar 7 and form, in an opposite direction dike height 20m, block stone grid height=0.8 times in an opposite direction dike height=16m.The many arrangement modes blocking the array structure that stone mar 7 forms are: the stone mar that respectively blocks that adjacent two row block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively, and the stone mar that respectively blocks that adjacent two rows block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively.The columns of described array structure is 3 row, the median particle diameter D of cut-off material
50=2.0m, column pitch l=2D
50=4m, the adjacent spacing n=3 blocked between stone mar 7 in each row
50=6m.Described to block stone mar be its cross section of steel pipe pile is annular, and the outer radius of circular ring section is 1m.
Result of the test: when Longkou width is 50m, dam to enter and block stone grid scope, after entering this section, closure difficulty obviously reduces, now clash water drop before and after dike to reduce, main drop concentrates on and blocks before and after stone Gate, and Longkou maximum flow of water flow velocity is 7.83m/s, and before and after dike, drop is 5.42m in an opposite direction, blocking drop before and after stone grid is 2.12m, and unit stream energy maximum value is 182tm/ (ms).Under this flow, the total turnover rate of its cut-off material is only 4.54%, artificial cut-off material without loss, 6.13 ten thousand sides that get the raw materials ready of damming.
Embodiment 3
The present embodiment is led wall along dike 2 downstream in an opposite direction perpendicular to open channel at Longkou 6 section of damming and is blocked stone grid 3 apart from leading within the scope of wall 50m to arrange, described in block stone grid be the many array structures blocking stone mar 7 and form, in an opposite direction dike height 20m, block stone grid height=0.8 times in an opposite direction dike height=16m.The many arrangement modes blocking the array structure that stone mar 7 forms are: the stone mar that respectively blocks that adjacent two row block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively, and the stone mar that respectively blocks that adjacent two rows block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively.The columns of described array structure is 5 row, the median particle diameter D of cut-off material
50=2.0m, column pitch l=D
50=2m, the adjacent spacing n=2D blocked between stone mar 7 in each row
50=4m.The described stone mar that blocks is concrete pile, and its cross section is circular, the radius R=0.5m of cross section.
Result of the test: when Longkou width is 50m, dams to enter and blocks stone grid scope.After entering this section, closure difficulty obviously reduces, now clash water drop before and after dike to reduce, main drop concentrates on and blocks before and after stone Gate, and Longkou maximum flow of water flow velocity is 7.33m/s, before and after dike, drop is 5.01m in an opposite direction, blocking drop before and after stone grid is 2.47m, and unit stream energy maximum value is 172tm/ (ms).Under this flow, its total turnover rate of damming is only 4.54%, artificial cut-off material without loss, 5.89 ten thousand sides that get the raw materials ready of damming.
Comparative example 1
Adopting in an opposite direction dike to arrange, is not arrange along dike 2 downstream in an opposite direction at Longkou section to block stone Gate with the difference of embodiment 1,2,3.
Result of the test: during the width 30m ~ 15m of Longkou, overflow weir starts overcurrent, dam and reach most hard time, maximum flow of water flow velocity is up to 9.93m/s, before and after dike, water drop reaches 7.54m in an opposite direction, and unit stream energy is up to 234tm/ (ms), and the total turnover rate of its cut-off material reaches 47.5%, artificial cut-off material turnover rate reaches 39.47%, and the side's of getting the raw materials ready amount is 9.02 ten thousand sides.
The project profile of embodiment 4, embodiment 5, embodiment 6 and comparative example 2 is as follows:
Tunnel diversion is adopted, closure discharge 1270m in the construction of certain power station
3/ s, this power station bed elevation is 1574m, consider the recycling of later stage Diversion Tunnel, therefore inlet of diversion tunnel elevation is decided to be 1584m, both discrepancy in elevation reaches 10m, and simultaneously because construction speed causes its shunting building single, and engineering is dammed and is subject to the influence of topography, other shunting buildings of unconditional build, closure difficulty is larger.
For above-mentioned engineering, carry out the simulated test of damming of following embodiment 4, embodiment 5, embodiment 6 and comparative example 2.
Embodiment 4
The present embodiment blocks stone grid 3 along clashing dike 2 downstream perpendicular to arranging within the scope of left bank, river course also distance left bank, river course 50m at Longkou 6 section that dams, by Diversion Tunnel water conservancy diversion, in an opposite direction dike height 15m, described in block stone grid be the many array structures blocking stone mar 7 and form, block stone grid height=0.4 times in an opposite direction dike height=6m.The many arrangement modes blocking the array structure that stone mar 7 forms are: the stone mar that respectively blocks that adjacent two row block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively, and the stone mar that respectively blocks that adjacent two rows block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively.The columns of described array structure is 7 row, the median particle diameter D of cut-off material
50=1.5m, column pitch l=D
50=1.5m, the adjacent spacing n=2D blocked between stone mar 7 in each row
50=3m.The described stone mar that blocks is concrete pile, and its cross section is rectangle, the length a of square-section and the ratio a:b=1:0.8 of width b, wherein b=0.5m, a=0.625m.
Result of the test: dam in process, maximum flow of water flow velocity is 6.12m/s, before and after dike, water drop is 2.73m in an opposite direction, blocking water drop before and after stone grid is 4.33m, unit stream energy maximum value is 92.7tm/ (ms), the total turnover rate of cut-off material is only 10.29%, and wherein artificial cut-off material turnover rate is 7.12%, 3.4 ten thousand sides that get the raw materials ready of damming.
Embodiment 5
The present embodiment blocks stone grid 3 along clashing dike 2 downstream perpendicular to arranging within the scope of left bank, river course also distance left bank, river course 50m at Longkou 6 section that dams, by Diversion Tunnel water conservancy diversion, in an opposite direction dike height 15m, described in block stone grid be the many array structures blocking stone mar 7 and form, block stone grid height=0.4 times in an opposite direction dike height=6m.The many arrangement modes blocking the array structure that stone mar 7 forms are: the stone mar that respectively blocks that adjacent two row block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively, and the stone mar that respectively blocks that adjacent two rows block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively.The columns of described array structure is 3 row.The median particle diameter D of cut-off material
50=1.5m, column pitch l=3D
50=4.5m, the adjacent spacing n=2D blocked between stone mar 7 in each row
50=3m.The described stone mar that blocks is concrete pile, and its cross section is rectangle, the length a of square-section and the ratio a:b=1:1.25 of width b, wherein b=3m, a=2.4m.
Result of the test: dam in process, maximum flow of water flow velocity is 5.33m/s, before and after dike, water drop is 1.81m in an opposite direction, blocking water drop before and after stone grid is 5.42m, unit stream energy maximum value is 78.6tm/ (ms), the total turnover rate of cut-off material is only 7.29%, and wherein artificial cut-off material turnover rate is 3.12%, 3.1 ten thousand sides that get the raw materials ready of damming.
Embodiment 6
The present embodiment blocks stone grid 3 along clashing dike 2 downstream perpendicular to arranging within the scope of left bank, river course also distance left bank, river course 50m at Longkou 6 section that dams, by Diversion Tunnel water conservancy diversion, in an opposite direction dike height 15m, described in block stone grid be the many array structures blocking stone mar 7 and form, block stone grid height=0.4 times in an opposite direction dike height=6m.The many arrangement modes blocking the array structure that stone mar 7 forms are: the stone mar that respectively blocks that adjacent two row block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively, and the stone mar that respectively blocks that adjacent two rows block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively.The columns of described array structure is 4 row.The median particle diameter D of cut-off material
50=1.5m, column pitch l=3D
50=4.5m, the adjacent spacing n=2D blocked between stone mar 7 in each row
50=3m.The described stone mar that blocks is concrete pile, and its cross section is circular, the radius R=3m of circular cross-section.
Result of the test: dam in process, maximum flow of water flow velocity is 5.41m/s, before and after dike, water drop is 1.73m in an opposite direction, blocking water drop before and after stone grid is 5.62m, unit stream energy maximum value is 77.5tm/ (ms), the total turnover rate of cut-off material is only 7.13%, and wherein artificial cut-off material turnover rate is 3.08%, 30,000 sides that get the raw materials ready of damming.
Comparative example 6
Adopting traditional line type to clash dike to dam, is not arrange along dike 2 downstream in an opposite direction at Longkou section to block stone Gate with the difference of embodiment 4,5,6.
Result of the test: during the width 40m ~ 15m of Longkou, maximum flow of water flow velocity is up to 7.45m/s, water drop reaches 7.22m, unit stream energy is up to 147tm/ (ms), the total turnover rate of cut-off material is up to 70%, wherein artificial cut-off material turnover rate reaches 70.2%, and need higher damming to jettisoning intensity and more artificial cut-off material, it is 6.2 ten thousand sides that the side of getting the raw materials ready measures simultaneously.
As can be seen from above-described embodiment and comparative example, of the present invention damming is used to add rough method with blocking stone grating solid, the turnover rate of cut-off material during can reducing highly difficult Longkou closure of damming, improve the economy of dam project, reduce closures current flow velocity, drop and unit stream energy simultaneously, ensure the safety and successfully damming of damming.
Claims (10)
1. one kind dams and adds rough method with blocking stone grating solid, it is characterized in that the method is passed through to arrange along in an opposite direction dike (2) downstream at Longkou of damming (6) section to block stone grid (3) and carry out solid and add rough, to reduce closures current flow velocity, drop and unit stream energy, stop the loss of cut-off material, the described stone grid that block are the many array structures blocking stone mar (7) and form, and block stone grid (3) dike height highly=(0.4 ~ 0.8) in an opposite direction.
2. dam according to claim 1 and add rough method with blocking stone grating solid, it is characterized in that the many arrangement modes blocking the array structure that stone mar (7) forms are: the stone mar that respectively blocks that adjacent two row block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively, the stone mar that respectively blocks that adjacent two rows block in arbitrary row of stone mar corresponds in another row the respective voids center arrangement of blocking between stone mar respectively.
3. dam according to claim 2 and add rough method with blocking stone grating solid, it is characterized in that many column pitch m=(0.5 ~ 3) D blocking the array structure that stone mar (7) forms
50, in each row, the adjacent spacing n=(0.75 ~ 2) blocked between stone mar (7)
d50, wherein, D
50for the median particle diameter of cut-off material.
4. dam according to claim arbitrary in claims 1 to 3 and add rough method with blocking stone grating solid, it is characterized in that the many columns blocking the array structure that stone mar (7) forms are 3 ~ 7 row, row should make each row position of blocking residing for stone mar not surmount the width of Longkou.
5. dam according to claim arbitrary in claims 1 to 3 and add rough method with blocking stone grating solid, blocking stone mar (4) described in it is characterized in that is steel pipe pile, and its cross section is annular, and the outer radius of circular ring section is 0.1 ~ 1m.
6. dam according to claim 4 and add rough method with blocking stone grating solid, blocking stone mar (7) described in it is characterized in that is steel pipe pile, and its cross section is annular, and the outer radius of circular ring section is 0.1 ~ 1m.
7. dam according to claim arbitrary in claims 1 to 3 and add rough method with blocking stone grating solid, blocking stone mar (7) described in it is characterized in that is concrete pile, its cross section is circular or rectangle, when cross section is circular, its radius R=0.5 ~ 3m, when cross section is rectangle, ratio a:b=1:(0.8 ~ 1.25 of its length (a) and width (b)), wherein b=0.5 ~ 3m.
8. dam according to claim 4 and add rough method with blocking stone grating solid, blocking stone mar (7) described in it is characterized in that is concrete pile, its cross section is circular or rectangle, when cross section is circular, its radius R=0.5 ~ 3m, when cross section is rectangle, ratio a:b=1:(0.8 ~ 1.25 of its length (a) and width (b)), wherein b=0.5 ~ 3m.
9. dam according to claim 5 and add rough method with blocking stone grating solid, blocking stone mar (7) described in it is characterized in that is concrete pile, its cross section is circular or rectangle, when cross section is circular, its radius R=0.5 ~ 3m, when cross section is rectangle, ratio a:b=1:(0.8 ~ 1.25 of its length (a) and width (b)), wherein b=0.5 ~ 3m.
10. dam according to claim 6 and add rough method with blocking stone grating solid, blocking stone mar (7) described in it is characterized in that is concrete pile, its cross section is circular or rectangle, when cross section is circular, its radius R=0.5 ~ 3m, when cross section is rectangle, ratio a:b=1:(0.8 ~ 1.25 of its length (a) and width (b)), wherein b=0.5 ~ 3m.
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| CN108313211A (en) * | 2018-03-21 | 2018-07-24 | 中国电建集团中南勘测设计研究院有限公司 | A kind of floating navigation ban device |
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| CN105839597A (en) * | 2016-05-31 | 2016-08-10 | 中国葛洲坝集团第工程有限公司 | Cut-off device of flow baffle and method |
| CN105839597B (en) * | 2016-05-31 | 2018-06-26 | 中国葛洲坝集团第一工程有限公司 | Flow-stopping plate cut-off equipment and method |
| CN108313211A (en) * | 2018-03-21 | 2018-07-24 | 中国电建集团中南勘测设计研究院有限公司 | A kind of floating navigation ban device |
| CN108313211B (en) * | 2018-03-21 | 2024-01-30 | 中国电建集团中南勘测设计研究院有限公司 | Floating navigation forbidden device |
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