CN210262966U - Reconstruction ecological water drainage hole structure combined with permanent plug - Google Patents
Reconstruction ecological water drainage hole structure combined with permanent plug Download PDFInfo
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- CN210262966U CN210262966U CN201920803675.8U CN201920803675U CN210262966U CN 210262966 U CN210262966 U CN 210262966U CN 201920803675 U CN201920803675 U CN 201920803675U CN 210262966 U CN210262966 U CN 210262966U
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Abstract
The utility model relates to a hydraulic and hydroelectric engineering construction water conservancy diversion technical field discloses a rebuild ecology hole structure that drains that combines with permanent end cap, including the diversion tunnel and establish the permanent end cap in the diversion tunnel, permanent end cap lower part is equipped with the ecology hole that drains, and permanent end cap downstream side has arranged rebuild radial gate lock chamber section and has rebuild the export diffuser, and the ecological hole top that drains that lies in the permanent end cap is equipped with the grout corridor, and the grout corridor extends to dam main curtain line upstream side upstream, extends to rebuild radial gate lock chamber section downstream. The utility model discloses the ecological hole structure that drains of reconstruction that combines with permanent end cap avoids when high arch dam body low elevation position sets up the water conservancy diversion bottom outlet, and the lower floodgate retaining period maintains the low reaches river ecology under the water conservancy diversion tunnel, strives for the engineering time for permanent end cap, can save the time limit for a project, saves the engineering investment simultaneously.
Description
Technical Field
The utility model relates to a hydraulic and hydroelectric engineering construction water conservancy diversion technical field, concretely relates to rebuild ecology that combines with permanent end cap hole structure that drains.
Background
The method is characterized in that an extra-high arch dam is built in a high mountain valley region, a diversion mode that a cofferdam blocks off a riverbed and a diversion tunnel is used for discharging flow is generally adopted in the early construction diversion period, and a diversion mode that a dam body temporarily diverts a bottom hole and a bank side flood discharging tunnel is adopted in the later construction diversion period. When the diversion tunnel is plugged, the water level of the reservoir gradually rises, and before the water level does not reach the height of a flood discharge hole of the ultra-high arch dam, the water flow has no drainage channel, so that the dehydration and the flow interruption of a downstream river channel are caused, the aquatic ecology in the water storage period is damaged, and the adverse effects on fish resources, industrial and agricultural production, life water taking, shipping, landscapes and the like are generated. Meanwhile, the reservoir water storage level is controlled by the height of the flood discharge hole of the ultra-high arch dam due to the technical level limitation of the existing gate, the gate of the diversion tunnel with the large section is difficult to bear the high water pressure caused by an overhigh water head, and when the diversion tunnel is directly used as a water discharge hole, the high water head dynamic water closing door of the plane gate has higher risk.
At present, for the engineering of the super-high arch dam with the height of more than 200 meters, the scheme of setting the diversion bottom hole at the lower elevation part of the arch dam body is generally adopted, so that the problems of downstream dehydration and cutoff in the lower gate water storage period of the diversion tunnel, difficulty in supporting the high water head of the diversion tunnel gate, high risk of high water head dynamic water closing of the plane gate and the like are solved, and the setting conditions of the diversion bottom hole of the super-high arch dam built at home and abroad are shown in table 1:
TABLE 1 table for setting up diversion bottom hole of built ultrahigh arch dam at home and abroad
However, the arrangement of the diversion bottom holes on the dam body has certain problems and disadvantages:
(1) the middle upper part of the body of the extra-high arch dam is generally provided with flood discharge surface holes and flood discharge middle holes (or deep holes), while the length of the body of the arch dam which is generally built at the narrow part of the riverbed is limited, and then the body of the arch dam is provided with flow guide bottom holes and is provided with opening and closing equipment such as gates and corresponding auxiliary structures, so that the arrangement is difficult;
(2) arranging a flow guide bottom hole at the lower part of the dam body of the ultra-high arch dam, arranging a hole and arranging a corresponding auxiliary structure, so that the structure of the dam body becomes complicated, the stress distribution of the dam body is greatly influenced, and the safety of the dam body is not facilitated;
(3) the dam concrete pouring construction progress is influenced, and for projects with dam construction as key lines, the straight construction period is 1-2 months;
(4) the diversion bottom holes and the auxiliary structures thereof and equipment have large engineering quantity and high investment, the investment of one diversion bottom hole of an ultra-high arch dam with more than 200 meters in China is about 4000 ten thousand-5000 ten thousand yuan, the application time of the diversion bottom holes is short, the diversion bottom holes are only used within 5-6 months of the water storage period of a reservoir after the diversion tunnel is closed, and the economy is poor; in addition, as the diversion bottom holes are arranged at the lower elevation part of the dam body, part of the upstream cofferdam needs to be dismantled to have inflow conditions, and the engineering quantity and the engineering investment are correspondingly increased.
In addition, the diversion tunnel is reconstructed into an ecological drainage tunnel controlled by the radial gate, the flow cross section of the local tunnel section of the diversion tunnel is reduced into the ecological drainage tunnel, the radial gate is arranged at the outlet of the ecological drainage tunnel, so that the ecological drainage tunnel meets the large-flow drainage, and the radial gate meets the high-water-head moving underwater gate condition. The ecological water drainage tunnel technology for controlling the radial gate by rebuilding the diversion tunnel can solve the problems of no cutoff, large-flow water drainage, river ecology maintenance, reduction of water retaining pressure of the diversion tunnel gate and the like in the water storage period of the lower gate of the diversion tunnel, and simultaneously solves and avoids a series of problems existing in the arrangement of a diversion bottom hole on the dam body.
In the technical scheme of the existing ecological drainage tunnel reconstructed into the radial gate control, the ecological drainage tunnel is adopted to replace a diversion bottom hole of a dam body to supply water to the downstream in the lower gate plugging period of the diversion tunnel, and after the reconstructed ecological drainage tunnel finishes the overflowing mission, permanent plug construction is carried out in the original diversion tunnel. Under general conditions, ecological drainage hole reconstruction and the construction of the permanent plug of the diversion tunnel need to be completed in the same dry season, ecological drainage hole reconstruction is firstly carried out in the early stage of the dry season, after the ecological drainage hole overflows, the original diversion tunnel is plugged by a lower gate, and as the reconstructed ecological drainage hole and the debugging of the arc door need certain construction time, generally 3-4 months, the construction of the diversion tunnel reconstructed ecological drainage hole directly occupies the construction time of the permanent plug of the diversion tunnel in the later stage, and the construction of the permanent plug of the diversion tunnel in the later stage is difficult to complete in the same dry season. Meanwhile, the reconstruction plug structure in the reconstructed ecological water drainage hole is similar to the permanent plug structure of the diversion tunnel, the reconstruction plug and the ecological water drainage hole are separately arranged, the engineering investment is large, and the economical efficiency is poor.
Disclosure of Invention
The utility model aims at exactly being not enough to above-mentioned technique, provide a rebuild ecology hole structure that drains that combines with permanent end cap, avoid when high arch dam body low elevation position sets up the water conservancy diversion bottom outlet, reach the purpose of maintaining the low reaches river ecology, saving the time limit for a project, saving the engineering investment.
For realizing above-mentioned mesh, the utility model discloses a rebuild ecology that combines with permanent end cap hole structure of draining, include the diversion tunnel and establish permanent end cap in the diversion tunnel, permanent end cap lower part is equipped with the ecology hole of draining, permanent end cap downstream side arrange with the reconstruction radial gate lock chamber section of the ecology hole intercommunication of draining, reconstruction radial gate lock chamber section low reaches arranged with the reconstruction export diffusion section of reconstruction radial gate lock chamber section intercommunication, permanent end cap internal bit in the ecology hole top of draining is equipped with the grout corridor, the grout corridor extends to dam main curtain line upstream side upstream, extends to downstream reconstruction radial gate lock chamber section.
Preferably, the rebuilt radial gate lock chamber section includes rebuilt radial gate lock chamber and switching the rebuilt radial gate in ecological hole of draining, be equipped with the rebuilt lock chamber traffic hole with external intercommunication in the rebuilt radial gate lock chamber, the staff of being convenient for goes into interior work.
Preferably, permanent end cap water stopping grooves are arranged between the lining of the diversion tunnel and the outside surrounding rock, the permanent end cap water stopping grooves are arranged between the lining of the diversion tunnel and the permanent end caps, the shallow shear resisting grooves of the permanent end caps are arranged at intervals on the side wall of the diversion tunnel lining, the shear resisting anchor rods of the permanent end caps are arranged at the middle lower part of the side wall of the diversion tunnel lining, the grout stopping rods of the permanent end caps are arranged on the downstream boundary of the permanent end caps, the grout stopping rods of the ecological drainage tunnel are arranged on the downstream boundary of the ecological drainage tunnel, the water stopping grooves of the ecological drainage tunnel are arranged between the backfilled concrete at the upstream side of the ecological drainage tunnel and the permanent end caps, the anchor rods of the ecological drainage tunnel are arranged on the side wall and the bottom plate of the ecological drainage tunnel, the overflow surface of the ecological.
Compared with the prior art, the utility model, have following advantage:
1. compared with the traditional scheme that the diversion bottom holes are arranged on the dam body, the scheme can avoid arranging the diversion bottom holes at the low-elevation part of the dam body of the high arch dam and maintain the ecology of the downstream river in the sluice storage period of the diversion tunnel;
2. compared with the scheme that the ecological drainage hole reconstructed from the diversion tunnel is arranged independently with the permanent plugs, the scheme can avoid the increase of the engineering investment formed by independently setting the reconstructed structure, and simultaneously saves the straight line construction period increased by independently setting the reconstructed structure.
Drawings
FIG. 1 is a schematic longitudinal section of the present invention combined with a permanent plug to reconstruct an ecological drainage tunnel structure;
FIG. 2 is a schematic plan view of the present invention, which is combined with a permanent plug, to reconstruct an ecological drainage tunnel structure;
FIG. 3 is a cross-sectional view of J1-J1 of FIG. 1;
FIG. 4 is a cross-sectional view of J2-J2 of FIG. 1.
The components in the figures are numbered as follows:
the ecological drainage tunnel comprises a diversion tunnel 1, a permanent plug 2, an ecological drainage tunnel 3, a reconstructed arc gate chamber section 4, a reconstructed outlet diffusion section 5, a grouting gallery 6, a dam main curtain line 7, a reconstructed arc gate chamber 8, a reconstructed arc gate 9, a reconstructed gate chamber traffic tunnel 10, a permanent plug water stopping groove 11, a permanent plug shallow shear resisting groove 12, a permanent plug shear resisting anchor rod 13, a permanent plug slurry stopping rod 14, an ecological drainage tunnel slurry stopping rod 15, an ecological drainage tunnel water stopping groove 16, an ecological drainage tunnel shear resisting anchor rod 17 and a lining 18.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
As shown in the figures 1 and 2, respectively, fig. 3 and fig. 4 show, the utility model discloses the ecological hole structure that drains of reconstruction that combines with permanent end cap, include diversion tunnel 1 and establish permanent end cap 2 in diversion tunnel 1, 2 lower parts of permanent end cap are equipped with the ecological hole 3 that drains, 2 downstream sides of permanent end cap arrange the reconstruction radial gate lock chamber section 4 with the ecological 3 intercommunication that drains in the hole, reconstruction radial gate lock chamber section 4 is including reconstruction radial gate lock chamber 8 and the ecological reconstruction radial gate 9 that drains in switching, be equipped with the reconstruction lock chamber traffic hole 10 with external intercommunication in the reconstruction radial gate lock chamber 8, 4 low reaches of reconstruction radial gate lock chamber section are arranged and are exported the diffusion zone 5 with the reconstruction of 4 intercommunication in the radial gate lock chamber, it is equipped with grout corridor 6 to lie in ecological hole 3 top of draining in permanent end cap 2, grout corridor 6 upstream sides extend to dam main curtain line 7 upstream sides, downstream extends to reconstruction radial gate lock chamber section 4.
In addition, a permanent plug water stop groove 11 is arranged between a lining 18 and an outer side surrounding rock of the diversion tunnel 1, the permanent plug water stop groove 11 is arranged between the lining 18 and a permanent plug 2 of the diversion tunnel 1, the shallow shear resistant grooves 12 of the permanent plugs are arranged at intervals on the side wall of a lining 18 of the diversion tunnel 1, a permanent plug shear resistant anchor rod 13 is arranged at the middle lower part of the side wall of the lining 18 of the diversion tunnel 1, a permanent plug slurry stop rod 14 is arranged at the downstream boundary of the permanent plug 2, an ecological water discharge hole slurry stop rod 15 is arranged at the downstream boundary of the ecological water discharge hole 3, an ecological water discharge hole water stop groove 16 is arranged between backfilled concrete at the upstream side of the ecological water discharge hole 3 and the permanent plug 2, ecological shear resistant anchor rods 17 of the ecological water discharge hole are arranged on the side wall and the bottom plate of the ecological.
The arrangement method for reconstructing the ecological water drainage hole structure by combining the permanent plugs comprises the following steps:
A) pouring the lining 18 of the diversion tunnel 1;
B) reserving an ecological water drainage hole 3 at the lower part of the permanent plug 2, pouring the upper structure of the permanent plug 2 in the diversion tunnel 1, and reserving a grouting gallery 6;
C) a reconstruction arc gate chamber section 4 communicated with the ecological water drainage hole 3 is arranged at the downstream side of the permanent plug 2, and a reconstruction outlet diffusion section 5 communicated with the reconstruction arc gate chamber section 4 is arranged at the downstream of the reconstruction arc gate chamber section 4;
D) and after the overflowing is finished through the ecological water drainage hole 3, backfilling concrete in the ecological water drainage hole 3.
In the step A), when the lining 18 of the diversion tunnel 1 is cast, the permanent plug water stop groove 11 arranged between the lining 18 of the diversion tunnel 1 and the surrounding rock on the outer side is constructed.
In the step B), when the permanent plug 2 is cast, the construction of the shallow shear groove 12 of the permanent plug, the shear anchor rod 13 of the permanent plug, the grout stopping stem 14 of the permanent plug and the water stopping groove 11 of the permanent plug arranged between the lining 18 of the diversion tunnel 1 and the permanent plug 2 is carried out.
And D), after the ecological drainage tunnel 3 finishes overflowing, roughening the overflowing surface, and arranging an ecological drainage tunnel shear anchor rod 17 on the side wall and the bottom plate of the ecological drainage tunnel 3.
And D), when concrete of the ecological water drainage hole 3 is backfilled, constructing a water stop groove 16 of the ecological water drainage hole and a grout stop stem 15 of the ecological water drainage hole.
This embodiment uses in wudongde hydropower station engineering, compares traditional scheme, if set up the water conservancy diversion bottom outlet at the dam body, need set up 4 water conservancy diversion bottom outlets at least at the dam body, will influence the dam at least and pour straight line time limit for a project 1 ~ 2 months, increase the dam body and set up about the engineering investment 8300 ten thousand yuan that the water conservancy diversion bottom outlet formed, consider wudongde hydropower station first two units once a month average generated energy 5.4 hundred million KWh, the dam body does not establish the water conservancy diversion bottom outlet and can generate electricity 1 ~ 2 months in advance, can generate electricity increase about 3.6 million yuan, the benefit of the electricity generation of increase is very obvious. Meanwhile, as in the Wudongde hydropower station project, the scheme of singly arranging the diversion tunnel for reconstructing the ecological water drainage hole and the permanent plugs increases the investment of reconstruction projects by about 500 ten thousand yuan compared with the scheme of singly arranging the permanent plugs in the embodiment, and simultaneously increases the construction period of singly arranging the permanent plugs for 2-3 months.
Compared with the traditional scheme that the dam body is provided with the diversion bottom hole, the scheme can avoid the diversion bottom hole from being arranged at the low-elevation part of the dam body of the high arch dam, and maintain the downstream river ecology in the lower gate water storage period of the diversion tunnel; compared with the scheme of singly arranging the ecological drainage hole reconstructed by the diversion tunnel and the permanent plugs, the scheme can avoid the increase of the engineering investment formed by singly arranging the reconstruction structure, and simultaneously save the linear construction period increased by singly arranging the reconstruction structure; meanwhile, the technology can also strive for the construction time for the permanent plug 1, saves the engineering investment and is beneficial to the development of the construction technology of the ultra-high arch dam.
Claims (3)
1. The utility model provides a rebuild ecology with permanent end cap and drain hole structure, includes diversion tunnel (1) and establishes permanent end cap (2) in diversion tunnel (1), its characterized in that: permanent end cap (2) lower part is equipped with the ecology and turns on water hole (3), permanent end cap (2) downstream side arranged with the reconstruction radial gate lock chamber section (4) of the ecology hole (3) intercommunication that turns on water, reconstruction radial gate lock chamber section (4) low reaches arranged with reconstruction export diffuser section (5) of reconstruction radial gate lock chamber section (4) intercommunication, lie in permanent end cap (2) the ecology hole (3) top of turning on water is equipped with grout corridor (6), grout corridor (6) extend to dam main curtain line (7) upstream side, extend to downstream reconstruction radial gate lock chamber section (4).
2. A reconstructed ecological drainage tunnel structure combined with a permanent plug according to claim 1, which is characterized in that: rebuild radial gate lock room section (4) including rebuild radial gate lock room (8) and switching the ecological rebuilt radial gate (9) of draining hole (3), be equipped with in rebuilt radial gate lock room (8) with external intercommunication rebuilt lock room traffic hole (10).
3. A reconstructed ecological drainage tunnel structure combined with a permanent plug according to claim 1, which is characterized in that: permanent plug water-stop grooves (11) are arranged between the lining (18) of the diversion tunnel (1) and the surrounding rock at the outer side, permanent plug water-stop grooves (11) are arranged between the lining (18) of the diversion tunnel (1) and the permanent plugs (2), permanent plug shallow shear-resistant grooves (12) are arranged at intervals on the side wall of the lining (18) of the diversion tunnel (1), permanent plug shear-resistant anchor rods (13) are arranged at the middle lower part of the side wall of the lining (18) of the diversion tunnel (1), permanent plug slurry-stop rods (14) are arranged at the downstream boundary of the permanent plugs (2), ecological water-discharging hole slurry-stop rods (15) are arranged at the downstream boundary of the ecological water-discharging hole (3), ecological water-discharging hole water-stop grooves (16) are arranged between backfilled concrete at the upstream side of the ecological water-discharging hole (3) and the permanent plugs (2), and ecological water-discharging hole shear-resistant anchor rods (17) are arranged on the side wall, and the overflowing surface of the ecological water drainage hole (3) is roughened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920803675.8U CN210262966U (en) | 2019-05-30 | 2019-05-30 | Reconstruction ecological water drainage hole structure combined with permanent plug |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920803675.8U CN210262966U (en) | 2019-05-30 | 2019-05-30 | Reconstruction ecological water drainage hole structure combined with permanent plug |
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| CN210262966U true CN210262966U (en) | 2020-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080180A (en) * | 2019-05-30 | 2019-08-02 | 长江勘测规划设计研究有限责任公司 | Reconstruction ecology drainage tunnel structure and its method for arranging in conjunction with permanent plug |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080180A (en) * | 2019-05-30 | 2019-08-02 | 长江勘测规划设计研究有限责任公司 | Reconstruction ecology drainage tunnel structure and its method for arranging in conjunction with permanent plug |
| CN110080180B (en) * | 2019-05-30 | 2023-12-05 | 长江勘测规划设计研究有限责任公司 | Reconstruction ecological water drain hole structure combined with permanent plug and arrangement method thereof |
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