CN215165305U - Overflow sand-washing composite dam - Google Patents
Overflow sand-washing composite dam Download PDFInfo
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- CN215165305U CN215165305U CN202120394505.6U CN202120394505U CN215165305U CN 215165305 U CN215165305 U CN 215165305U CN 202120394505 U CN202120394505 U CN 202120394505U CN 215165305 U CN215165305 U CN 215165305U
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Abstract
The utility model discloses a compound dam of overflow sand washing belongs to hydraulic and hydroelectric engineering structures design and construction technical field. The overflow sand-washing composite dam is suitable for being hydrophilic for people and can realize sand washing of the whole cross section of a river channel. Overflow sand washing composite dam include the overflow dam body, overflow sand washing composite dam still include two at least silt wash-out systems, the overflow dam body projection in its cross section be the step at the downstream side, each silt wash-out system along overflow dam body length direction order and mutual spaced arrangement be in the overflow dam body on, the double-layered husky of in the river course rivers passes through silt wash-out system discharge to the downstream side river course of overflow dam body under the cooperation of overflow dam body in.
Description
Technical Field
The utility model relates to a compound dam of overflow sand washing belongs to hydraulic and hydroelectric engineering structures design and builds technical field.
Background
In order to avoid sediment accumulation in front of the dam and influence on the storage capacity of the reservoir in front of the dam, a sand flushing gate is usually required to be arranged on one side of the overflow dam, and when the sediment accumulation in front of the dam reaches a certain degree, the sand flushing gate is opened to discharge the sediment in the reservoir to the downstream. The structure is characterized in that: 1) the overflow dam is arranged perpendicular to the river channel, a practical weir type is often adopted, and a gate is not arranged; 2) the sand flushing gate is arranged on one side of the overflow dam, and the top elevation of the bottom plate of the sand flushing gate is lower than that of the weir of the overflow dam; 3) the sand flushing gate is opened and closed through a gate arranged in the gate chamber. The structure has the advantages that: because the top elevation of the bottom plate of the sand washing gate is lower than that of the weir of the overflow dam, when the sand washing gate is opened, the reservoir silt in a certain range in front of the gate and above the top elevation of the bottom plate can be discharged to the downstream. The main problems of this structure are: 1) the overflow dam is in a practical weir type, the top space is small, and the hydrophilic space of people cannot be provided; 2) the sand flushing gate is arranged at one side of the overflow dam, so that the silt of a reservoir in a certain range in front of the gate can be discharged to the downstream generally, the silt in the middle and at the other side of a river channel cannot be used as the foundation, and the reservoir capacity in front of the dam is obviously reduced after the dam operates for a period of time; 3) the sand flushing gate adopts a gate to open and close, so that one-time investment is large, and later operation and maintenance cost is high; 4) by adopting the scheme of firstly silting and then flushing, the flow discharged from the overflow dam is not effectively utilized to flush sand.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the overflow sand-washing composite dam is suitable for being hydrophilic for people and can realize sand washing of the whole cross section of a river channel.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an overflow sand washing composite dam, includes the overflow dam body, overflow sand washing composite dam still include two at least silt flushing and discharging systems, the overflow dam body projection in its cross section be the step at the downstream side, each silt flushing and discharging system along overflow dam body length direction order and the arrangement of mutual interval be in the overflow dam body on, the double-layered sand that presss from both sides in the river course rivers passes through silt flushing and discharging system discharge to the downstream side river course of overflow dam body under the cooperation of overflow dam body.
Further, a silt sedimentation collecting system is arranged on the upstream side of the overflow dam body and connected with the silt flushing and discharging system.
The preferred mode of above-mentioned scheme is, silt subside collecting system include silt subside the shop cover and silt collect the canal, silt collect the canal and arrange along length direction close to overflow dam body upstream side dam body root, the lower reaches end of the silt settlement shop cover of the laying on silt collect the canal upstream side riverbed with silt collect the canal and connect, the downstream side of silt collect the canal with silt wash the drainage system intercommunication.
Each silt flushing and discharging system at least comprises a silt conveying hole, the silt conveying holes penetrate through the overflow dam body, the axial center line of each silt conveying hole is perpendicular to the center line of the overflow dam body along the length direction, and the upstream ends of the silt conveying holes are communicated with silt collecting channels at corresponding positions.
The preferable mode of the scheme is that each silt flushing and draining system at least comprises a sand draining gallery, and the upstream end of the sand draining gallery extending downstream along the water flow direction is communicated with the downstream end of the sand conveying hole.
Furthermore, each sand discharge gallery is of an open structure, and the open upper side of the sand discharge gallery is sealed by a cover plate.
The preferable mode of the scheme is that a protection flat is further arranged on the riverbed at the downstream side of the overflow dam body, and the sand discharge gallery is embedded in the protection flat at the corresponding position.
Further, silt washes row's system still include towards husky moisturizing structure, towards husky moisturizing structure arrange on the overflow dam body of defeated sand hole end.
Furthermore, the sand flushing water supplementing structure is a water supplementing hole formed in the overflow dam body.
The utility model has the advantages that: the application provides an overflow sand washing composite dam uses current overflow dam body as the basis, through increasing to set up two at least silt flushing and discharging systems, then will overflow dam body projection in its cross section set to the step shape at the downstream side, and with each silt flushing and discharging system along overflow dam body length direction order and the arrangement at intervals each other be in the overflow dam body on. Because each silt flushing system is along overflow dam body length direction order and the arrangement of mutual interval be in the overflow dam body on, the double-layered husky alright in the river course rivers discharge rivers through at any time like this silt flushing system will realize the full section of river course towards husky in discharging the downstream side river course to the overflow dam body under the cooperation of overflow dam body. Meanwhile, the projection of the overflow dam body in the cross section of the overflow dam body is arranged to be step-shaped on the downstream side, so that the overflow dam is particularly suitable for the hydrophilic requirement of people.
Drawings
Fig. 1 is a schematic view of a flat arrangement structure of the overflow sand-washing composite dam face of the utility model;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line 1-1 of FIGS. 1 and 2;
fig. 4 is a cross-sectional view 2-2 of fig. 1 and 2.
Labeled as: overflow dam body 1, silt wash-off system 2, silt subside collection system 3, silt subside the shop cover 4, silt collection canal 5, defeated sand hole 6, arrange husky corridor 7, apron 8, protection flat 9, wash husky moisturizing structure 10.
Detailed Description
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the utility model provides a suitable crowd is hydrophilic, can realize the overflow sand washing composite dam of the full cross-section sand washing of river course. Overflow sand washing composite dam include overflow dam body 1, overflow sand washing composite dam still include two at least silt wash away system 2, overflow dam body 1 projection in its cross section be the step at the downstream side, each silt wash away system 2 along 1 length direction order of overflow dam body and the arrangement of mutual interval be in overflow dam body 1 on, the double-layered sand that presss from both sides in the river course rivers passes through silt wash away system 2 discharge to the downstream side river course of overflow dam body 1 under overflow dam body 1's cooperation. The application provides an overflow sand washing composite dam uses current overflow dam body as the basis, through increasing to set up two at least silt flushing and discharging systems, then will overflow dam body projection in its cross section set to the step shape at the downstream side, and with each silt flushing and discharging system along overflow dam body length direction order and the arrangement at intervals each other be in the overflow dam body on. Because each silt flushing system is along overflow dam body length direction order and the arrangement of mutual interval be in the overflow dam body on, the double-layered husky alright in the river course rivers discharge rivers through at any time like this silt flushing system will realize the full section of river course towards husky in discharging the downstream side river course to the overflow dam body under the cooperation of overflow dam body. Meanwhile, the projection of the overflow dam body in the cross section of the overflow dam body is arranged to be step-shaped on the downstream side, so that the overflow dam is particularly suitable for the hydrophilic requirement of people.
In the above-mentioned embodiment, for furthest's realization full-section overflow towards husky in river course, this application is in the upstream side of overflow dam body 1 has still arranged silt and has subsided collecting system 3, silt subside collecting system 3 with silt wash-off system 2 be connected. At this moment, silt sedimentation collecting system 3 preferably include silt sedimentation cover 4 and silt collection canal 5, silt collection canal 5 arrange along length direction adjacent to 1 upstream side dam body root of overflow dam body, the downstream end of the silt sedimentation cover 4 of the laying on 5 upstream side riverbed of silt collection canal with silt collection canal 5 connect, the downstream side of silt collection canal 5 with silt flushing system 2 communicate.
Further, for realizing silt along with the long-pending purpose along with dashing, make full use of overflow dam let off rivers towards husky, each that this application provided silt wash system 2 all include a defeated husky hole 6 at least, defeated husky hole 6 pass overflow dam body 1, the axial central line perpendicular to overflow dam body 1 of defeated husky hole 6 is along length direction's central line the canal 5 intercommunications are collected to the silt of defeated husky hole 6's upper reaches end and relevant position department. Meanwhile, in order to improve the sand washing effect, each silt flushing and draining system 2 at least comprises a sand draining gallery 7, and the upstream end of the sand draining gallery 7 extending downstream along the water flow direction is communicated with the downstream end of the sand conveying hole 6; silt flushing and discharging system 2 still include sand flushing moisturizing structure 10, sand flushing moisturizing structure 10 arrange on the overflow dam body 1 of defeated sand hole end. At this time, the sand-flushing water-supplementing structure 10 is a water-supplementing hole formed in the overflow dam body 1. Correspondingly, for the convenience of the clearance of the silt of deposit in row's husky corridor 7 when water flow rate is slow, each of this application row's husky corridor 7 be open structure, row's husky corridor 7 is open upside and is passed through apron 8 and seal. The structural feature that still is provided with the apron 9 on the riverbed of reunion overflow dam body 1 downstream side, this application will the sediment outflow corridor 7 inlay in the apron 9 of relevant position department.
In conclusion, the overflow sand-flushing composite dam provided by the application for flushing sand of the overflow dam in the river channel with slower natural slope has the following advantages,
1) the crowd hydrophilic space is provided, and the stepped overflow dam is adopted, so that the dam top and the space of each step is larger, and a larger hydrophilic space can be provided for the crowd;
2) the method realizes 'side silting and side scouring', when the upstream sand-laden water flows to the front of the dam, the silt is deposited on the top of the concrete cover due to the reduction of the flow speed; due to the drainage of the sand conveying holes and the action of gravity, silt is firstly discharged to the silt collecting channel along the concrete paved top surface of the inclined downstream, then is discharged into the sand conveying holes along the bottom plates of the silt collecting channel inclined adjacent to the sand conveying holes, and then is discharged to the sand flushing gallery along with the drainage in the sand conveying holes; in order to avoid the problems of over-small flow, over-low flow speed and insufficient sand flushing capacity of the sand flushing gallery, part of water flow discharged from the stepped overflow dam is introduced into the sand flushing gallery through the water replenishing holes arranged on the dam heel of the stepped overflow dam, and the silt is discharged to a downstream river channel through the sand flushing gallery together with the flow discharged from the sand conveying holes.
3) The sand washing range is enlarged, the sand washing system is uniformly arranged along the axis direction of the stepped overflow dam, the transverse space of a river channel can be effectively covered, and the problem of sediment deposition in front of the dam can be effectively solved.
4) The one-time investment is small, the operation and maintenance cost is low, a gate structure is not arranged on the structure, and the one-time investment and the operation and maintenance cost are obviously reduced; in addition, the sand flushing system can be overhauled only by opening the cover plate at the top of the sand flushing gallery, and the overhaul is convenient.
Example one
The technical problem that this application will be solved provides one kind and can satisfy crowd's hydrophilic demand, can effectively solve the silt siltation problem before the dam again, and disposable input is few, the operation maintenance cost is low, overhaul convenient overflow towards husky composite construction.
The technical scheme adopted for solving the technical problem is as follows:
1) adjusting the practical weir overflow dam into a step-shaped overflow dam, arranging a concrete blanket at the upstream toe of the step-shaped overflow dam, and arranging the top surface of the concrete blanket in an inclined downstream manner;
2) a sand washing gate is cancelled, and a plurality of sand washing systems are uniformly distributed along the axial direction of the stepped overflow dam, wherein each sand washing system comprises a sediment collecting channel, a sand conveying hole, a water supplementing hole, a sand washing gallery, a cover plate and the like;
3) the silt collecting channel is positioned at the top of the downstream end of the concrete paving cover and is arranged perpendicular to the river channel, and a bottom plate of the silt collecting channel is inclined to the adjacent silt conveying hole;
4) the sand conveying holes penetrate through the step-shaped overflow dam, the upper stream of the sand conveying holes is connected with the silt collecting channel, the lower stream of the sand conveying holes is connected with the sand flushing gallery, and the inner size of the sand conveying holes meets the requirement of discharging sediment deposited in front of the dam;
5) the water replenishing hole is arranged at the downstream dam heel of the stepped overflow dam, the top elevation of the water replenishing hole is higher than the top elevation of the apron, and the lower part of the water replenishing hole is communicated with the sand conveying hole and the sand flushing gallery;
6) the sand flushing gallery is arranged in a downstream apron of the stepped overflow dam, the upstream is connected with a sand conveying hole, the top of the sand flushing gallery is provided with a cover plate, and the top elevation of the cover plate is consistent with that of the apron; the bottom plate of the sand flushing gallery is inclined to the downstream, and the inner size of the sand flushing gallery is larger than the sand conveying hole.
Claims (9)
1. The utility model provides a compound dam of overflow sand washing, includes overflow dam body (1), its characterized in that: overflow sand washing composite dam still include two at least silt flushing system (2), overflow dam body (1) projection in its cross section be the step shape at the downstream side, each silt flushing system (2) along overflow dam body (1) length direction order and mutual spaced arrangement be in overflow dam body (1) on, the double-layered husky of in the river course rivers passes through silt flushing system (2) discharge to the downstream side river course of overflow dam body (1) under the cooperation of overflow dam body (1).
2. The overflow sand-washing composite dam of claim 1, wherein: the upstream side of overflow dam body (1) has still arranged silt and has subsided collecting system (3), silt subside collecting system (3) with silt wash-off system (2) be connected.
3. The overflow sand-washing composite dam of claim 2, wherein: silt subsides collecting system (3) including silt subsides shop cover (4) and silt collects canal (5), silt collect canal (5) along length direction close to overflow dam body (1) upper reaches side dam body root arrange, shop cover silt on silt collect canal (5) upper reaches side riverbed subside the low reaches end of shop cover (4) with silt collect canal (5) connect, silt collect the downstream side of canal (5) with silt wash-off system (2) intercommunication.
4. The overflow sand-washing composite dam of claim 1, 2 or 3, wherein: each silt flushing and discharging system (2) all include a defeated sand hole (6) at least, defeated sand hole (6) pass overflow dam body (1), the axial centerline perpendicular to overflow dam body (1) of defeated sand hole (6) is along length direction's central line, the upper reaches end and the silt of relevant position department of defeated sand hole (6) collect canal (5) intercommunication.
5. The overflow sand-washing composite dam of claim 4, wherein: each silt flushing and draining system (2) at least comprises a sand draining gallery (7), and the upstream end of the sand draining gallery (7) extending downstream along the water flow direction is communicated with the downstream end of the sand conveying hole (6).
6. The overflow sand-washing composite dam of claim 5, wherein: each sand discharge gallery (7) is of an open structure, and the open upper side of the sand discharge gallery (7) is sealed by a cover plate (8).
7. The overflow sand-washing composite dam of claim 6, wherein: still be provided with apron (9) on the riverbed of overflow dam body (1) downstream side, sediment outflow corridor (7) inlay in apron (9) of relevant position department.
8. The overflow sand-washing composite dam of claim 7, wherein: silt washes row system (2) still include towards husky moisturizing structure (10), towards husky moisturizing structure (10) arrange on defeated sand hole terminal overflow dam body (1).
9. The overflow sand-washing composite dam of claim 8, wherein: the sand flushing water supplementing structure (10) is a water supplementing hole formed in the overflow dam body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120394505.6U CN215165305U (en) | 2021-02-22 | 2021-02-22 | Overflow sand-washing composite dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120394505.6U CN215165305U (en) | 2021-02-22 | 2021-02-22 | Overflow sand-washing composite dam |
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| Publication Number | Publication Date |
|---|---|
| CN215165305U true CN215165305U (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120394505.6U Active CN215165305U (en) | 2021-02-22 | 2021-02-22 | Overflow sand-washing composite dam |
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| CN (1) | CN215165305U (en) |
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2021
- 2021-02-22 CN CN202120394505.6U patent/CN215165305U/en active Active
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