CN208455586U - Tail water channel structure for covering layer foundation - Google Patents
Tail water channel structure for covering layer foundation Download PDFInfo
- Publication number
- CN208455586U CN208455586U CN201820861292.1U CN201820861292U CN208455586U CN 208455586 U CN208455586 U CN 208455586U CN 201820861292 U CN201820861292 U CN 201820861292U CN 208455586 U CN208455586 U CN 208455586U
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- bottom plate
- tailwater channel
- sand
- collecting slot
- wall
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- 230000005484 gravity Effects 0.000 claims abstract description 32
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004576 sand Substances 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000009182 swimming Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 10
- 230000006378 damage Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 239000013049 sediment Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Revetment (AREA)
Abstract
The utility model provides a tail water channel structure used on a covering layer foundation, which comprises a tail water outlet structure; and a sand collecting groove, an upward inclined gravity retaining wall and a tail canal bottom plate are sequentially arranged on the downstream side of the tail water outlet structure from the upstream to the downstream along the water flow direction, and the sand collecting groove, the upward inclined gravity retaining wall and the tail canal bottom plate are positioned on the covering layer foundation. The novel tailing ditch structure is characterized in that a sand collecting groove is arranged at the upstream end of the tailing ditch structure, and a tailing bucket is arranged at the downstream end of the tailing ditch structure, so that siltation in the ditch is effectively reduced, and the structure type is optimized; the inclined gravity retaining wall is integrated into a tail canal structure, so that the stability of the covering layer foundation is ensured; meanwhile, the tooth walls are additionally arranged on the upper and lower sides of the bottom plate of the tail water channel, so that the bottom plate is prevented from slipping and damaging along the inclined plane of the covering layer foundation, the damage of uneven settlement to the bottom plate of the tail water channel, the civil engineering quantity and the construction difficulty are reduced, and the engineering benefit is obvious.
Description
Technical field
The tailwater channel structure that the utility model relates to a kind of on alluvial deposit foundation belongs to water power hydraulic engineering technology neck
Domain, suitable for water power hydraulic engineering, the tailrace engineering that Riverbed is deep and silt content of river is high.
Background technique
In hydraulic and hydroelectric engineering, tailwater channel is arranged in the downstream of power plant building tailrace outlet structure, is by hydraulic generator
Water flow after unit generation introduces the water conveyance structure of downstream river course.Tailwater channel generally with unit be discharged equivalent width, axis with
River is parallel or oblique river downstream direction, it is desirable that water flow is smooth, prevents siltation in canal or washes away, while making every effort to save engineering
Amount.
Engineering practice finds that it is uneven that sediment siltation, bottom plate in canal often easily occur for the tailwater channel structure on alluvial deposit foundation
The problems such as valve pit subsidence, at present conventional treatment measure have: husky using collection is arranged in tailwater channel upstream end for sediment siltation problem
End sill is arranged in downstream in slot；For bottom plate uneven subsidence, shallow overburden is using excavation method of replacing, deep covering
Layer is using the methods of blanket grouting, anchor pole reinforcement.The method of the above sediment siltation processing, efficiently solves siltation in tailwater channel
Problem, but generally using relatively excavating suddenly, side slope when slope ratio is opened so as to cause coating is steeper, and side slope exists dives in sand-collecting slot downstream side
It is adversely affected in unstability etc., a kind of tailrace covering as disclosed in the Chinese patent application No. is 201520336932.3
Layer foundation structure；The method of the above deep covering layer basement process, engineering effort is preferable, but construction investment is relatively large, economical
Index is more sensitive, while difficulty of construction is larger, and construction speed is slow, and such as application No. is 201510183177.4 Chinese patent public affairs
A kind of method and structure for the prevention and treatment power plant building tailwater channel foundation uneven settlement opened.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of tailwater channel structure on alluvial deposit foundation,
The tailwater channel structure being used on alluvial deposit foundation solves silt in canal existing for the tailrace on coating riverbed
The problems such as siltation, bottom plate differential settlement destroy.
The utility model is achieved by the following technical programs.
A kind of tailwater channel structure on alluvial deposit foundation provided by the utility model, including tailrace outlet structure；?
The downstream side of tailrace outlet structure, Parallel to the flow direction are successively arranged sand-collecting slot from upstream to downstream, face upward inclined gravity retaining wall, tail water
Canal bottom plate, sand-collecting slot, face upward inclined gravity retaining wall, tailwater channel bottom plate is positioned on layer ground；The tailwater channel bottom plate it is upper and lower
The bottom at trip end is equipped with key-wall, and end sill is equipped at the top of downstream, and the downstream side of end sill is arranged along the sided vertical of key-wall；
The sand-collecting slot, face upward inclined gravity retaining wall, tailwater channel bottom plate is obliquely installed along water (flow) direction, tilt angle uniform increments；It is described
It sand-collecting slot and faces upward inclined gravity retaining wall and forms overall structure, face upward between inclined gravity retaining wall and tailwater channel bottom plate there are structural joint,
Key-wall is arranged along the sided vertical of structural joint.
The key-wall, end sill bottom width be 0.5m, the slope ratio of key-wall and the non-conterminous side of structural joint is 1:0.5,
The slope ratio of the upstream side of end sill is 1:0.5；The Bottom Altitude of the key-wall is lower than the elevation of tailwater channel bottom plate, and is not less than
1m。
Sand gravel loaded filter or blotter are equipped between the bottom and alluvial deposit foundation of the tailwater channel bottom plate.
The section configuration of the sand-collecting slot be it is trapezoidal, the groove width of sand-collecting slot Parallel to the flow direction is not less than 1m.
The sand-collecting slot is 0.5m in the top width of upstream side, and the bottom width of sand-collecting slot is not less than 1m, in upstream
The slope ratio of side is 1:0.5, and on the slope of downstream side, ratio is 1:0.5~1:1.
The tailwater channel bottom plate with a thickness of 0.5~1.2m, the hillside fields of tailwater channel bottom plate is 1:3~1:4, tailwater channel bottom plate
Planar dimension be no more than 15m.
The bottom width for facing upward inclined gravity retaining wall is not less than 3.5m, and the slope ratio for facing upward the wall back of inclined gravity retaining wall is 1:
1~1:1.5.
The top width of the structural joint is not less than the thickness of tailwater channel bottom plate.
The Bottom Altitude H3 of the sand-collecting slot is lower than the Bottom Altitude H1 of tailrace outlet structure, and H1-H3 > 0.5m；It is described
The upstream side elevation of sand-collecting slot and the Bottom Altitude H1 of tailrace outlet structure are consistent；The elevation H4 of the sand-collecting slot downstream side
Lower than the cope level H2 of tailrace outlet structure, and H2-H4 > 1m.
The cope level H5 of the end sill is higher than the elevation H6 of underwater bed cleaning, is lower than the minimum electrical generation water H7 in downstream, and
H5-H6 > 0.5m, H7-H5 > 0.5m.
The utility model has the beneficial effects that: sand-collecting slot is arranged at tailwater channel structure upstream end, end sill is arranged in downstream,
It is effective to mitigate siltation in canal, optimize structural shape；Inclined gravity retaining wall will be faced upward and incorporate tailwater channel structure, so that it is guaranteed that covering
The stability of layer ground；Meanwhile key-wall is added by the upstream and downstream side in tailwater channel bottom plate, along coating to avoid bottom plate
Sliding rupture occurs for the inclined surface of base, reduces differential settlement to the harm of tailwater channel bottom plate and civilwork engineering quantity, difficulty of construction,
Project benefit is obvious.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the direction view of Figure 1A-A；
In figure: 1- tailrace outlet structure, 2- alluvial deposit foundation, 3- sand-collecting slot, 4- face upward inclined gravity retaining wall, 5- tailwater channel bottom
Plate, 6- key-wall, 7- end sill, 8- structural joint.
Specific embodiment
Be described further below the technical solution of the utility model, but claimed range be not limited to it is described.
As depicted in figs. 1 and 2, a kind of tailwater channel structure on alluvial deposit foundation, tailwater channel structure are cast in place reinforced bar
The downstream side of power plant building tailrace outlet structure 1, including tailrace outlet structure 1 is arranged in concrete structure；In tailrace outlet knot
The downstream side of structure 1, Parallel to the flow direction are successively arranged sand-collecting slot 3 from upstream to downstream, face upward inclined gravity retaining wall 4, tailwater channel bottom plate
5, sand-collecting slot 3, face upward inclined gravity retaining wall 4, tailwater channel bottom plate 5 is positioned in layer ground 2 (for deep covering layer ground)；It is described
The bottom at the upstream and downstream end of tailwater channel bottom plate 5 is equipped with key-wall 6, and end sill 7, the downstream side of end sill 7 are equipped at the top of the end of most downstream
Face is arranged along the sided vertical of key-wall 6；The sand-collecting slot 3 faces upward inclined gravity retaining wall 4, tailwater channel bottom plate 5 along water (flow) direction inclination
Setting, tilt angle uniform increments；For enhancing structure monolithic stability, improve structure tension performance, the sand-collecting slot 3 with face upward inclined
Gravity retaining wall 4 forms overall structure, faces upward between inclined gravity retaining wall 4 and tailwater channel bottom plate 5 that there are structural joints 8, and key-wall 6 is along structure
The sided vertical setting of seam 8.
The tailrace outlet structure 1 is using a kind of power station disclosed in the Chinese patent application No. is 201710372266.2
Tailrace outlet structure in ground power house tailrace outlet structure.
The key-wall 6, end sill 7 bottom width be 0.5m, the slope ratio of key-wall 6 and the non-conterminous side of structural joint 8 is 1:
0.5, the slope ratio of the upstream side of end sill 7 is 1:0.5；The Bottom Altitude of the key-wall 6 is lower than the elevation of tailwater channel bottom plate 5, and
Not less than 1m；Key-wall 6 is used to prevent tailwater channel bottom plate 5 from sliding rupture occurs along the inclined surface of alluvial deposit foundation 2, and alleviates water
Flow 5 lower part of scour tailwater channel bottom plate alluvial deposit foundation 2, thus caused by structure differential settlement destroy.
Certain thickness sand gravel loaded filter or broken is equipped between the bottom and alluvial deposit foundation 2 of the tailwater channel bottom plate 5
Stone bed course, in favor of the influence of two side hydraulic pressures of balance and mitigation 2 differential settlement of alluvial deposit foundation.
The section configuration of the sand-collecting slot 3 be it is trapezoidal, husky convenient for collection, volume is larger, can effectively mitigate siltation in canal,
The groove width of 3 Parallel to the flow direction of sand-collecting slot is not less than 1m；The sand-collecting slot 3 is 0.5m in the top width of upstream side, and collection is husky
The bottom width of slot 3 is not less than 1m, and on the slope of upstream side, ratio is 1:0.5, and on the slope of downstream side, ratio is 1:0.5~1:1；Collection
Husky slot 3 is used to precipitate power generation water flow and carries or into rock ballast, the big partial size silt in tailwater channel, prevent rock ballast from entering draft tube mill
Damage turbine-generator units.
The tailwater channel bottom plate 5 with a thickness of 0.5~1.2m, the hillside fields of tailwater channel bottom plate 5 is 1:3~1:4, tailwater channel bottom
The planar dimension of plate 5 is no more than 15m；Tailwater channel bottom plate 5 is used to maintain the stability of slope of construction time and runtime alluvial deposit foundation 2
Property, it prevents the alluvial deposit foundation 2 in downstream side from slope slide instability occurs along slope foot and destroys.
The bottom width for facing upward inclined gravity retaining wall 4 is not less than 3.5m, and the slope ratio for facing upward the wall back of inclined gravity retaining wall 4 is
1:1~1:1.5 faces upward 4 sectional form of inclined gravity retaining wall and is determined according to the stable calculation of the side slope of alluvial deposit foundation 2,
For maintaining the slope stability of construction time and runtime alluvial deposit foundation 2, prevent downstream side alluvial deposit foundation 2 from occurring along slope foot
Slope slide instability destroys.
The top width of the structural joint 8 is not less than the thickness of tailwater channel bottom plate 5, can preferably avoid due to unevenly sinking
Modified difference caused by drop, resolution mitigate sand-collecting slot 3, face upward the damaged in collision between inclined gravity retaining wall 4, tailwater channel bottom plate 5.
The Bottom Altitude H3 of the sand-collecting slot 3 is lower than the Bottom Altitude H1 of tailrace outlet structure 1, and H1-H3 > 0.5m；Institute
The upstream side elevation for stating sand-collecting slot 3 is consistent with the Bottom Altitude H1 of tailrace outlet structure 1；3 downstream side of sand-collecting slot
Elevation H4 is lower than the cope level H2 of tailrace outlet structure 1, and H2-H4 > 1m.
The cope level H5 of the end sill 7 is higher than the elevation H6 of underwater bed cleaning, is lower than the minimum electrical generation water H7 in downstream, and
H5-H6 > 0.5m, H7-H5 > 0.5m；The stone that end sill 7 is used to intercept tailwater channel downstream river course rolls into tailwater channel, intercepts return water
The bed load sediment carried under one's arms enters tailwater channel.
Further, sand-collecting slot 3 and end sill 7 is respectively set at tailwater channel upstream and downstream end, by water body rock ballast or passage
Matter silt largely intercepts outside tailwater channel, and the rock ballast into tailwater channel is deposited in sand-collecting slot 3, and sand prevention effect of sedimentation reduction is significant, favorably
In the normal operation of unit.
Further, optimize traditional tailwater channel structural shape, inclined gravity retaining wall will be faced upward and melt 4 conjunctions to tailwater channel structure, led to
It crosses and faces upward inclined gravity retaining wall 4 in the setting of 3 downstream side of sand-collecting slot, maintain the stability of construction time and runtime alluvial deposit foundation 2,
Significant effect.
Further, by the way that key-wall 6 is arranged at the bottom upstream and downstream end of tailwater channel, prevent tailwater channel bottom plate 5 along coating
Sliding rupture occurs for the inclined surface of ground 2, while mitigating tailwater channel caused by due to water flow is along structural joint scour alluvial deposit foundation 2
5 differential settlement of bottom plate destroys.
Further, sand-collecting slot 3 and end sill 7 can effective sand control, face upward inclined gravity retaining wall 4 and key-wall 6 increase structure
Stability.
Further, the sediment deposition in tailwater channel in sand-collecting slot 3 or intercepts in 7 downstream side of end sill, position phase of depositing
To concentration, is cleared up convenient for the later period, reduce operation expense.
Further, tailwater channel length can be reduced, to have suitably using slope ratio is relatively excavated suddenly by facing upward inclined gravity retaining wall 4
Effect reduces earth excavation and civilwork engineering quantity, has saved the construction period, project benefit is obvious.
In conclusion the utility model provide it is a kind of it is practical it is reliable, structure is simple, it is easy for construction for coating
Tailwater channel structure on base, this is reasonable in design, and sediment siltation in canal, the destruction of bottom plate differential settlement etc. can be effectively relieved and lack
It falls into and insufficient, improves whole structural stability.
Claims (10)
1. a kind of tailwater channel structure on alluvial deposit foundation, including tailrace outlet structure (1), it is characterised in that: in tail water
The downstream side of export structure (1), Parallel to the flow direction are successively arranged sand-collecting slot (3) from upstream to downstream, face upward inclined gravity retaining wall
(4), tailwater channel bottom plate (5), sand-collecting slot (3), face upward inclined gravity retaining wall (4), tailwater channel bottom plate (5) is positioned over a layer ground (2)
On；The bottom at the upstream and downstream end of the tailwater channel bottom plate (5) is equipped with key-wall (6), is equipped with end sill (7) at the top of downstream, tail
The downstream side of bank (7) is arranged along the sided vertical of key-wall (6)；The sand-collecting slot (3) faces upward inclined gravity retaining wall (4), tailwater channel
Bottom plate (5) is obliquely installed along water (flow) direction, tilt angle uniform increments；The sand-collecting slot (3) and face upward inclined gravity retaining wall (4) shape
Integral structure, faces upward between inclined gravity retaining wall (4) and tailwater channel bottom plate (5) that there are structural joint (8), and key-wall (6) is along structural joint
(8) sided vertical setting.
2. as described in claim 1 for the tailwater channel structure on alluvial deposit foundation, it is characterised in that: the key-wall (6), tail
The bottom width of bank (7) is 0.5m, and the slope ratio of key-wall (6) and structural joint (8) non-conterminous side is 1:0.5, end sill (7) it is upper
The slope ratio for swimming side is 1:0.5；The Bottom Altitude of the key-wall (6) is lower than the elevation of tailwater channel bottom plate (5), and is not less than 1m.
3. as described in claim 1 for the tailwater channel structure on alluvial deposit foundation, it is characterised in that: the tailwater channel bottom plate
(5) sand gravel loaded filter or blotter are equipped between bottom and alluvial deposit foundation (2).
4. as described in claim 1 for the tailwater channel structure on alluvial deposit foundation, it is characterised in that: the sand-collecting slot (3)
Section configuration be it is trapezoidal, the groove width of sand-collecting slot (3) Parallel to the flow direction is not less than 1m.
5. as described in claim 1 for the tailwater channel structure on alluvial deposit foundation, it is characterised in that: the sand-collecting slot (3)
It is 0.5m in the top width of upstream side, the bottom width of sand-collecting slot (3) is not less than 1m, and on the slope of upstream side, ratio is 1:
0.5, on the slope of downstream side, ratio is 1:0.5~1:1.
6. as described in claim 1 for the tailwater channel structure on alluvial deposit foundation, it is characterised in that: the tailwater channel bottom plate
(5) with a thickness of 0.5~1.2m, the hillside fields of tailwater channel bottom plate (5) is 1:3~1:4, and the planar dimension of tailwater channel bottom plate (5) is not
More than 15m.
7. as described in claim 1 for the tailwater channel structure on alluvial deposit foundation, it is characterised in that: described to face upward inclined gravity
The bottom width of barricade (4) is not less than 3.5m, and the slope ratio for facing upward the wall back of inclined gravity retaining wall (4) is 1:1~1:1.5.
8. as described in claim 1 for the tailwater channel structure on alluvial deposit foundation, it is characterised in that: the structural joint (8)
Top width be not less than tailwater channel bottom plate (5) thickness.
9. as described in claim 1 for the tailwater channel structure on alluvial deposit foundation, it is characterised in that: the sand-collecting slot (3)
Bottom Altitude H3 be lower than the Bottom Altitude H1, and H1-H3 > 0.5m of tailrace outlet structure (1)；The upstream of the sand-collecting slot (3)
Side elevation is consistent with the Bottom Altitude H1 of tailrace outlet structure (1)；The elevation H4 of sand-collecting slot (3) downstream side is lower than tail
The cope level H2 of water out structure (1), and H2-H4 > 1m.
10. as described in claim 1 for the tailwater channel structure on alluvial deposit foundation, it is characterised in that: the end sill (7)
Cope level H5 is higher than the elevation H6 of underwater bed cleaning, is lower than the minimum electrical generation water H7 in downstream, and H5-H6 > 0.5m, H7-H5 >
0.5m。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820861292.1U CN208455586U (en) | 2018-06-05 | 2018-06-05 | Tail water channel structure for covering layer foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820861292.1U CN208455586U (en) | 2018-06-05 | 2018-06-05 | Tail water channel structure for covering layer foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208455586U true CN208455586U (en) | 2019-02-01 |
Family
ID=65159547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820861292.1U Active CN208455586U (en) | 2018-06-05 | 2018-06-05 | Tail water channel structure for covering layer foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208455586U (en) |
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2018
- 2018-06-05 CN CN201820861292.1U patent/CN208455586U/en active Active
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