CN112144488A - Multi-curved arch water-permeable stepped energy dissipation secondary dam capable of preventing river channel undercut from being damaged - Google Patents
Multi-curved arch water-permeable stepped energy dissipation secondary dam capable of preventing river channel undercut from being damaged Download PDFInfo
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- CN112144488A CN112144488A CN202011162257.9A CN202011162257A CN112144488A CN 112144488 A CN112144488 A CN 112144488A CN 202011162257 A CN202011162257 A CN 202011162257A CN 112144488 A CN112144488 A CN 112144488A
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- 230000021715 photosynthesis, light harvesting Effects 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 17
- 239000004575 stone Substances 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 3
- 239000004576 sand Substances 0.000 claims description 14
- 238000009991 scouring Methods 0.000 claims description 7
- 239000012466 permeate Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- 239000004746 geotextile Substances 0.000 abstract description 7
- 239000011435 rock Substances 0.000 abstract description 3
- 210000003781 tooth socket Anatomy 0.000 abstract 1
- 239000013049 sediment Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
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- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
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Abstract
The invention discloses a multi-curved arch water-permeable stepped energy dissipation secondary dam for preventing the undercut damage of a river channel, which is characterized in that a reed board and a gabion stone cage are laid on a bank slope and the river channel bottom, a gabion mesh multi-curved arch dam body is built on the river channel, the gabion mesh multi-curved arch dam body comprises a reinforcing mesh, a water-permeable geotextile, the reed board and a step-shaped rock block which are sequentially arranged along the water flow direction, a gabion mesh tooth socket and a reed board are arranged for preventing the dam foot of the gabion mesh curved dam body from being washed and damaged, and a tail sill is arranged behind the gabion mesh curved dam body on the river channel bottom. This dam body can stabilize the riverbed, reduces the longitudinal slope in this section river course, reduces the velocity of flow of sluicing rivers, makes to be washed away the river course and can increase silt deposit volume, increases the buried depth of riverbed building foundation, reduces the riverbed and cuts down.
Description
Technical Field
The invention relates to an energy dissipation secondary dam, in particular to a multi-curved arch water-permeable stepped energy dissipation secondary dam for preventing the undercut damage of a river channel.
Background
Along with the development of economy, more and more sand is collected at the middle and upper reaches of a river channel in a severe cold and arid region, the sand collection amount is increased day by day, the river situation is changed, the original silt flushing balance of a river bed is broken, the silt supplement amount of a downstream river channel is reduced or even completely cut off, particularly at the downstream river section of the drainage of a multi-stage rubber dam landscape river channel, the incoming water of the downstream river channel is clear water without silt, and under the action of large-drainage clear water, the river bed mainly containing fine particles or fine sand is cut seriously, so that the foundations of dikes at two banks of the original river channel are exposed and collapse seriously. If the downstream river channel of a certain highway bridge is seriously mined, the pile foundation (buried depth of 10m) of the highway bridge which is 3.5km away from the upstream of a sand mining pit is rushed out to deform, so that the traffic safety of the highway is endangered; in the river course 5.0km downstream of a landscape river, 6 sand and stone material sand mining fields and three sand blocking dams are newly added in nearly 8 years of the river course 20km upstream, so that no high-sand-content water flow occurs in the river course downstream of the landscape river, flood discharged for many years is precipitated by a plurality of sand mining pits and is intercepted by the sand blocking dams, the water flow discharged to the river course downstream of the landscape river is clear water without sand and is elutriated and damaged by the clear water all the year round, sand gravel river beds mainly comprising fine particles are cut down by 2-3m, a plurality of portions of embankment foundations on two sides of the river course are exposed and even destroyed by flushing, and embankment concrete side slopes collapse seriously.
In order to solve the hydraulic structure damage caused by serious cutting under the riverbed, the measures of dismantling deformed or collapsed structures are generally adopted, such as rebuilding or reinforcing a highway pile foundation, dismantling collapsed concrete side slopes, recovering the deformed or collapsed concrete side slopes, deepening the concrete side slope foundation or building a concrete gravity wall type barrage in a riverway and the like, but the measures not only have huge cost, but also have long construction period and poor effect, are greatly influenced by seasonal flood and have high requirements on the construction organization of the engineering.
Disclosure of Invention
The invention aims to solve the technical problem of providing a multi-curved arch water-permeable stepped energy dissipation secondary dam for preventing the bottom of a river channel from being damaged, wherein the manually built multi-curved arch water-permeable stepped energy dissipation secondary dam is used for changing the longitudinal slope of the river channel bottom, reducing the flow velocity of discharged water flow, increasing the sediment amount of sediment in discharged muddy water, reducing the bottom cut of the river channel, stabilizing the river bed and protecting the ecological environment of the river.
In order to solve the problems, the technical scheme adopted by the invention is as follows: a multi-curved arch water-permeable stepped energy dissipation secondary dam capable of preventing river undercutting damage is characterized in that reed boards and gabion cages are sequentially laid on river bank slopes on two sides and river bottom of a river respectively, a gabion mesh multi-curved arch dam body is built on the river, the gabion mesh multi-curved arch dam body comprises a reinforcing steel bar mesh, a water-permeable geotextile, reed boards and step-shaped stones which are sequentially arranged along the water flow direction, a gabion mesh tooth groove for preventing the leg of the gabion mesh multi-curved arch dam body from being washed and damaged and a vertical reed board for preventing river water from being washed and damaged are arranged in front of the gabion mesh multi-curved arch dam body on the river bottom, and a tail ridge is arranged on the river bottom behind the gabion mesh multi-curved arch dam body.
The height of the check net multi-curve arch dam body is determined according to the requirement of adjusting the longitudinal slope of the riverbed.
The lengths of the reed boards and the gabion along the water flow direction are 15.0-20.0 m, wherein the front length of the gabion mesh multi-curve arch dam body dam is 2.0-2.5 m.
The length of the step type block stone along the water flow direction is determined according to the energy dissipation length of the drop height between the check-binge multi-curve arch dam body and the riverbed; the height of the tail end of the step is at least 0.5m higher than the river bottom of the river channel, and is determined according to the scouring resistance of sand gravel at the bottom of the river bed.
The depth of the check mesh tooth groove is more than or equal to 1.5 m.
The height of the tail ridge is more than or equal to 1.5m, and the distance from the check net multi-curved arch dam body is more than or equal to 10 m.
The number of the check net multi-curved arch dam bodies is multiple, and the height and the number of the dam bodies and the distance between the dam bodies are set according to the requirement for changing the longitudinal slope of the riverbed.
The invention has the beneficial effects that: this dam body utilizes the curve dam body, has increased the overflow forward position of river, has guaranteed the normal flood discharge in river course to can make to be washed away the river course through the dam body that permeates water and can increase silt deposit volume, increase the buried depth of riverbed building foundation, stabilized the riverbed, reduce the longitudinal slope in this section river course, reduce the velocity of flow of sluicing rivers, reduce the riverbed and cut down, protected the ecological environment in river course.
Drawings
FIG. 1 is a diagram of a multi-curved arch water-permeable stepped energy dissipation secondary dam body for preventing the undercut damage of a river channel.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
as shown in figure 1, the multi-curved arch water-permeable stepped energy dissipation secondary dam for preventing the cutting damage of the river course comprises a plurality of steel bar nets 5, a plurality of water-permeable geotextiles 6, a plurality of reed plates 8 and a plurality of step-shaped stones 7 which are sequentially arranged on river course bank slopes 1 and river course river bottoms 2 on two sides, a plurality of curved arch dam bodies of check nets are built on the river course, the plurality of curved arch dam bodies of check nets comprise a plurality of steel bar nets 5, a plurality of water-permeable geotextiles 6, a plurality of reed plates 8 and a plurality of step-shaped stones 7 which are sequentially arranged along the water flow direction, a plurality of tooth grooves 11 of check nets for preventing the washing damage of the dam feet of the plurality of curved arch dam bodies of check nets and a plurality of vertical reed plates 10 for preventing the river water 9 from washing the damage of the river course river bottoms 2 are arranged in front of the multi-curved arch dam bodies of check nets, and.
The height of the check net multi-curve arch dam body is determined according to the requirement of adjusting the longitudinal slope of the riverbed.
The lengths of the reed boards 3 and the gabion gabions 4 in the water flow direction are 15.0-20.0 m, wherein the front length of the gabion mesh multi-curve arch dam body is 2.0-2.5 m.
The length of the step type block stone 7 along the water flow direction is determined according to the energy dissipation length of the drop height between the check-binge multi-curve arch dam body and the riverbed; the height of the tail end of the step is at least 0.5m higher than the river bottom of the river channel, and is determined according to the scouring resistance of sand gravel at the bottom of the river bed.
The depth of the check grid tooth grooves 11 is more than or equal to 1.5 m.
The height of the tail ridge 12 is more than or equal to 1.5m, and the distance from the check net multi-curved arch dam body is more than or equal to 10 m.
The number of the check net multi-curved arch dam bodies is multiple, and the height and the number of the dam bodies and the distance between the dam bodies are set according to the requirement for changing the longitudinal slope of the riverbed.
Specifically, the dam body can stabilize the riverbed, reduce the longitudinal slope of the section of the riverway, reduce the flow velocity of discharged water flow, increase the sediment deposition amount of the washed riverway, increase the burial depth of the building foundation of the riverbed and reduce the cutting under the riverbed. The height of the multi-curved arch dam body of the check net is 0.5-1.0 m higher than the water surface of river water, and the length of the block stone 7 along the direction of the water flow is more than or equal to 2.5 m.
In the present embodiment, the construction is performed according to the following steps: firstly, arranging a multi-curved arch permeable stepped energy dissipation secondary dam at a proper position of a river channel, wherein the height and the number of the dams and the distance between dam bodies are set according to the requirement of changing the longitudinal slope of a river bed; arranging reed boards and gabion protection slopes on the river bank slopes on the upstream and downstream of the dam body, arranging anti-washing gabion tooth grooves at the dam feet of the dam body, building the dam body, wherein the steps include check net forming, laying of permeable geotextile, laying of reed boards for protecting the permeable geotextile, filling of rock blocks, building of a tail ridge at a position 10.0-15.0 m behind the dam, and finishing the whole construction.
In order to stabilize the riverbed, reduce the longitudinal slope of the section of riverway, increase the sediment deposition of the scoured riverway and reduce the undercut of the riverway, a multi-arch water-permeable stepped energy-dissipating secondary dam is adopted, a multi-arch water-permeable stepped energy-dissipating secondary dam is arranged at a proper position of the riverway, a dam body is provided with water-permeable geotextile for preventing fine particles in the riverway from being taken away, and rock lumps of the dam body enable the water flow to be discharged smoothly, the height and the number of the dams and the distance between the dam bodies are set according to the change requirement of the riverbed longitudinal slope, the curve dam body increases the overflow front of the riverway, so that the single width flow of the dam body with the same river width is reduced, the kinetic energy of the discharged water flow with the same dam height is reduced, the scouring destructive power of the discharged water flow is reduced, meanwhile, the water-permeable dam is used for reducing the flow speed of the discharged water flow, the sediment deposition of the discharged water is increased, the bed surface of the river, the flow velocity of the discharged water flow is reduced, and the cutting degree of the riverbed is relieved. Is especially suitable for cold and arid area.
The dam body reduces the single width flow of water discharge of the same river width dam body through the water permeability of the permeable dam body, so that the scouring force and the destructive force of the discharged water flow to the rear of the dam are reduced, the height difference of the discharged water flow is reduced by the step dam body, the kinetic energy and the flow velocity water head of the discharged water flow to the riverbed are reduced, the scouring destructive force of the lower step or the riverbed of the discharged water flow is reduced, a water cushion with a certain depth is formed at the lower permeable dam crest (river bottom) of the water flow, and the impact force of the falling water flow at the dam crest to the downstream riverbed can be offset. This dam body can stabilize the riverbed, reduces the longitudinal slope in this section river course, reduces the velocity of flow of sluicing rivers, makes to be washed away the river course and can increase silt deposit volume, increases the buried depth of riverbed building foundation, reduces the riverbed and cuts down.
The above examples are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and the concept of step-type water-permeable energy dissipation and to implement the same, and the scope of the present invention should not be limited by the examples, i.e. equivalent changes or modifications such as material changes and structural adjustments made without departing from the spirit of the present invention are still within the scope of the present invention.
Claims (7)
1. The utility model provides a prevent river course undercut and destroy's step energy dissipation secondary dam that permeates water of many curved arches, a serial communication port, lay reed plate (3) and gabion net many curved arches dam body respectively in proper order on both sides river course bank slope (1) and river course bottom (2), build check bingo net many curved arches dam body on the river course, check bingo net many curved arches dam body is including reinforcing bar net (5), geotechnological cloth (6), reed plate (8), step form stone (7) that set gradually along the water flow direction, be equipped with in front of check bingo net many curved arches dam body on river course bottom (2) and prevent that the river water (9) from scouring away and destroy vertical bingo reed plate (10) of river course bottom (2), be provided with on river course bottom (2) behind check bingo net many curved arches dam body and bank (12).
2. The multi-curved arch water-permeable stepped energy dissipation secondary dam for preventing the lower cutting of the river channel as claimed in claim 1, wherein the height of the multi-curved arch shaped dam body of the check net is determined according to the requirement of adjusting the longitudinal slope of the riverbed.
3. The multi-curved arch water-permeable stepped energy dissipation secondary dam for preventing the lower cutting of the river channel as claimed in claim 1, wherein the lengths of the reed plate (3) and the gabion (4) in the direction of the water flow are 15.0m to 20.0m, and the front length of the gabion mesh multi-curved arch dam body dam is 2.0m to 2.5 m.
4. The multi-curved arch water-permeable stepped energy dissipation secondary dam for preventing the undercut of the river channel as claimed in claim 2, wherein the length of the stepped block stones (7) along the water flow direction is determined according to the energy dissipation length of the gebin net multi-curved arch dam body and the river bed drop; the height of the tail end of the step is at least 0.5m higher than the river bottom (2) of the river channel, and is determined according to the scouring resistance of sand gravel at the bottom of the riverbed.
5. The multi-arch water-permeable stepped energy dissipation secondary dam for preventing the lower cutting of the river channel as claimed in claim 1, wherein the depth of the grid-guest net tooth space (11) is more than or equal to 1.5 m.
6. The multi-curved arch water-permeable stepped energy dissipation secondary dam for preventing the lower cutting of the river channel as claimed in claim 1, wherein the height of the tail bank (12) is more than or equal to 1.5m, and the distance from the multi-curved arch dam body of the check net is more than or equal to 10 m.
7. The multi-curved arch water-permeable stepped energy dissipation secondary dam for preventing the lower cutting of the river channel as claimed in claim 1, wherein the number of the multi-curved arch shaped dams of the check net is plural, and the height, number and distance between the dams are set according to the requirement for changing the longitudinal slope of the riverbed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162257.9A CN112144488A (en) | 2020-10-27 | 2020-10-27 | Multi-curved arch water-permeable stepped energy dissipation secondary dam capable of preventing river channel undercut from being damaged |
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| CN202011162257.9A CN112144488A (en) | 2020-10-27 | 2020-10-27 | Multi-curved arch water-permeable stepped energy dissipation secondary dam capable of preventing river channel undercut from being damaged |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114075819A (en) * | 2021-11-23 | 2022-02-22 | 成都大学 | Energy dissipation structure for preventing flood discharge channel from scouring from both sides in alpine regions and flood discharge channel structure |
| CN117364711A (en) * | 2023-11-29 | 2024-01-09 | 中国科学院西北生态环境资源研究院 | Ecological permeable dike of hydraulic engineering and ecological water system |
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| CN213805270U (en) * | 2020-10-27 | 2021-07-27 | 中水北方勘测设计研究有限责任公司 | Prevent that river course from cutting step energy dissipation second grade dam that permeates water of many curved arches that destroys under |
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2020
- 2020-10-27 CN CN202011162257.9A patent/CN112144488A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102482861A (en) * | 2009-03-13 | 2012-05-30 | 伊诺克西有限公司 | Gabion elements for producing constructions such as walls, barricades, or the like |
| CN103898870A (en) * | 2014-03-18 | 2014-07-02 | 北京工业大学 | Gabion box ecological gabion river channel slope protection construction method |
| CN204282308U (en) * | 2014-11-18 | 2015-04-22 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of lattice guest gabion composite material dam adapting to deep covering layer |
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| CN107386220A (en) * | 2017-09-07 | 2017-11-24 | 中国电建集团成都勘测设计研究院有限公司 | The dam structure of breach shunting two |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114075819A (en) * | 2021-11-23 | 2022-02-22 | 成都大学 | Energy dissipation structure for preventing flood discharge channel from scouring from both sides in alpine regions and flood discharge channel structure |
| CN117364711A (en) * | 2023-11-29 | 2024-01-09 | 中国科学院西北生态环境资源研究院 | Ecological permeable dike of hydraulic engineering and ecological water system |
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