CN205314072U - Ecology that diversion tunnel reconstruction was controlled for radial gate hole of draining - Google Patents
Ecology that diversion tunnel reconstruction was controlled for radial gate hole of draining Download PDFInfo
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- CN205314072U CN205314072U CN201521068823.4U CN201521068823U CN205314072U CN 205314072 U CN205314072 U CN 205314072U CN 201521068823 U CN201521068823 U CN 201521068823U CN 205314072 U CN205314072 U CN 205314072U
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Abstract
The utility model discloses an ecology that diversion tunnel reconstruction was controlled for radial gate hole of draining, it includes waits to reform transform diversion tunnel (1), transformation diversion tunnel (1) divide into diversion tunnel A section (1.1), ecology drain hole (1.2), diversion tunnel B section (1.3) in proper order, afterbody and the ecology of diversion tunnel A section (1.1) drain the front end of hole (1.2) and link up each other, diversion tunnel B section (1.3) are located the end of reforming transform diversion tunnel (1) of waiting put the end, it has been overcome among the prior art, and the diversion tunnel gate is difficult to to keep out the high water head and the plane gate high water head moves the shortcoming that water closed a high risk, have satisfy under the diversion tunnel floodgate retaining phase do not become dry, the large -traffic advantage of turning on the water, keeping river ecology, reduce diversion tunnel gate manger plate water pressure.
Description
Technical field
This utility model relates to the technical field of Construction for Hydroelectric Project water conservancy diversion, be more specifically a kind of diversion tunnel reconstruction for gates of segmental shape control ecological drainage tunnel.
Background technology
Current domestic and international extra-high arch dam bottom diversion outlet facilities, high-mountain gorge areas builds extra-high arch dam, construction diversion early stage generally adopts the diversion mode of Lan Duan riverbed, cofferdam, diversion tunnel earial drainage, construction diversion later stage, takes the diversion mode of dam body temporary diversion bottom outlet and bank diversion tunnel. When after lock closure under diversion tunnel, reservoir level is gradually increasing, before water level is not up to extra-high arch dam flood-discharge hole elevation, current without under let out passage, cause that downstream river course dehydration stops, make water-retention phase aquatic ecological wreck, the stock of fish, industrial and agricultural production and life water intaking, shipping, view etc. are had a negative impact; Meanwhile, being subject to the restriction of existing gate technical merit, reservoir filling position is subject to the height process control of extra-high arch dam flood-discharge hole, and the diversion tunnel gate of big cross section bore, by being difficult to, the high hydraulic pressure that high water head brings; When diversion tunnel is directly as ecological drainage tunnel, there is high risk in the dynamic water blockage door of plane gate high water head.
For solving the downstream dehydration cutout of lock water-retention phase under diversion tunnel, diversion tunnel gate be difficult to keep out the problem such as high water head, the dynamic water blockage door excessive risk of plane gate high water head, at present both at home and abroad for river average discharge more than 1000m3/ s, dam height more than 200 meters extra-high arch dam engineering, generally individually employing arranges bottom diversion outlet at the relatively low elevation position of arch dam body, diversion tunnel closure gate adopts the later stage diversion plan of lock under bulkhgead gate.
Extra-high arch dam bottom diversion outlet facilities such as following table built both at home and abroad.
But existing dam body arranges bottom diversion outlet exists certain problems and disadvantages:
(1) arch dam body middle and upper part is generally provided with surface spillways and flood discharge mesopore (or deep hole), and the arch dams body length of generally building riverbed stenosis in is limited, set bottom diversion outlet at dam body again, and arrange the opening and closing devices such as gate and corresponding accessory structure, arrange comparatively difficulty.
(2) arrange bottom diversion outlet at arch dam body lower position, offer hole and arrange corresponding accessory structure, make dam structure become complicated, the impact of dam body stress distribution is big, unfavorable safety of dam body.
(3) affect dam concrete pouring construction progress, be the engineering of critical circuits for dam construction, straight line duration 2-3 month will be taken.
(4) quantities of bottom diversion outlet and accessory structure and equipment is big, investment is high, and the investment of domestic more than 200 meters extra-high one bottom diversion outlet of arch dam is about 40,000,000-5,000 ten thousand yuan; Further, since bottom diversion outlet is arranged on the relatively low elevation position of dam body, section upstream cofferdam need to be removed to possess influent stream condition, increase quantities and construction investment accordingly.
2, the diversion tunnel reconstruction project state of the art
Current diversion tunnel is generally reconstructed as following several buildings: (1) flood discharging tunnel; (2) power plant tail water hole (or combination); (3) adjutage of Valve controlling; These several diversion tunnels reconstruction technology, the extra-high arch dam water-retention phase that can not realize having does not stop and reduces diversion tunnel gate dash water pressure, the problems and disadvantages that some existence are certain.
For reconstruction for (1) flood discharging tunnel and (2) power plant tail water hole, it is Hydropower station pivotal permanent building, the purpose of reconstruction is for utilizing diversion tunnel, cost saving, project playout is compacter, flood discharging tunnel or powerplant intakes elevation after reconstruction are higher, it is difficult to possessing the water-retention phase does not stop, reduce diversion tunnel gate dash water pressure and eliminate the dynamic high risk function of water blockage door of plane gate high water head; Reconstruction is applied in earth-rock works for (1) flood discharging tunnel is generally many. For the adjutage that reconstruction is (3) Valve controlling, it is that reconstruction forms a section concrete plug in diversion tunnel hole, buries underground in plug by the steel pipe of Valve controlling, it is achieved downstream discharge water during water-retention, but the method is limited by pipeline and valve size, it is used for flow less than 150m3/ s discharges water, and requires big engineering for flow discharges, and discharge capacity is more difficult meets requirement, need to reconstruct the multiple adjutages of formation and mating valve system, causes difficult arrangement and construction investment high.
Summary of the invention
Of the present utility model first aims to overcome that the especially extra-high arch dam water-retention phase downstream river course dehydration cutout of arch dam in prior art, diversion tunnel gate are difficult to keep out high water head and the dynamic high risk shortcoming of water blockage door of plane gate high water head, utilize the advantage that gates of segmental shape dynamic water operation head is high, and the ecological drainage tunnel that the reconstruction of a kind of diversion tunnel controls for gates of segmental shape is proposed, its have meet that the lock water-retention phase under diversion tunnel does not stop, big flow discharges water, maintain river ecological, the advantage of reduction diversion tunnel gate dash water pressure.
The ecological drainage tunnel that the reconstruction of this utility model diversion tunnel controls for gates of segmental shape, it includes diversion tunnel to be rebuilt, and described transformation diversion tunnel is divided into diversion tunnel A section, ecological drainage tunnel, diversion tunnel B section; The front end of the afterbody of described diversion tunnel A section and ecological drainage tunnel is mutually communicated; Diversion tunnel B section is positioned at the end of described diversion tunnel to be rebuilt and puts end.
In technique scheme: described ecological drainage tunnel is made a concrete reconstruction body A by concreting closure, and described concrete reconstruction body A makes ecological drainage tunnel form a drainage gallery.
In technique scheme: be provided with concrete reconstruction body B at the rear of described ecological drainage tunnel, described concrete reconstruction body B is provided with the gates of segmental shape that can control aperture.
In technique scheme: the tall and big hole in ecological drainage tunnel, hole of described diversion tunnel to be rebuilt is high; Described diversion tunnel A section keeps consistent with diversion tunnel B section with the described original size of diversion tunnel to be rebuilt. Of the present utility model second aims to overcome that the deficiencies in the prior art part, and proposes the method that the reconstruction of a kind of diversion tunnel controls ecological drainage tunnel for gates of segmental shape, its advantage reducing diversion tunnel gate dash water pressure.
The method that this utility model a kind of diversion tunnel reconstruction controls ecological drainage tunnel for gates of segmental shape, comprises the steps:
1., dam construction middle and late stage before the lock water-retention phase under diversion tunnel, from diversion tunnel, the diversion tunnel to be rebuilt selected as ecological flow flood discharge passage is transformed, and selected diversion tunnel to be rebuilt is divided into diversion tunnel A section, ecological drainage tunnel, diversion tunnel B section;
The size of 2., described diversion tunnel A section keeps the afterbody of consistent and described diversion tunnel A section to be mutually communicated with the front end of ecological drainage tunnel with described diversion tunnel to be rebuilt (1) original size;
3., described ecological drainage tunnel is divided into M, N two sections;
M section: described ecological drainage tunnel concreting is made a concrete reconstruction body A, and described concrete reconstruction body A makes ecological drainage tunnel form a drainage gallery;
N section: N section is positioned at the rear of described ecological drainage tunnel drainage gallery outlet; By concreting N section, form concrete reconstruction body B, described concrete reconstruction body B is provided with the gates of segmental shape that can control aperture;
4., diversion tunnel B section be positioned at the end of described diversion tunnel to be rebuilt and put end, current are by, after reconstructing the ecological drainage tunnel formed, flowing out after entering diversion tunnel B section.
In technique scheme: the tall and big hole in ecological drainage tunnel, hole of described diversion tunnel to be rebuilt is high.
In technique scheme: described diversion tunnel A section keeps consistent with diversion tunnel B section with the described original size of diversion tunnel to be rebuilt.
In technique scheme: step 1. in, select any one as diversion tunnel to be rebuilt from diversion tunnel.
This utility model has following technological merit: (1) compared with prior art, the ecological drainage tunnel that diversion tunnel reconstruction camber gate controls, utilize the advantage that gates of segmental shape dynamic water operation head is high, the diversion tunnel of reconstruction is become light-gauge gates of segmental shape dash from the bulkhgead gate of big cross section, gates of segmental shape rolling friction is become from plane gate sliding friction during lower lock, tangent from gate become gate and current vertical with current, gate dash water pressure is obviously reduced, lower lock difficulty substantially reduces, plane gate high water head dynamic water blockage door problem when avoiding diversion tunnel directly as ecological drainage tunnel, and arc-shaped door can accomplish to let out under flow-control, dynamic water opens and closes reliable and stable, it addition, ecological drainage tunnel earial drainage can reduce reservoir level, be conducive to reducing other diversion tunnel plugging construction time gating door shield water heads, reduce gate dash water pressure.
(2) the ecological drainage tunnel that diversion tunnel reconstruction camber gate controls, not only avoid dam body bottom and offers bottom diversion outlet, it is to avoid weakens dam structure, is conducive to dam body stress; And because gates of segmental shape operates the advantage that head is high, diversion tunnel elevation is relatively low, possess higher discharge capacity, its big flow can be utilized to discharge water in the dam water-retention phase, there is greater efficiency. Compare dam body and bottom diversion outlet is set, it is considered under diversion tunnel, water level after lock and dam body punch stress condition, and bottom diversion outlet is arranged and raised as far as possible; Therefore, the ecological drainage tunnel input elevation of reconstruction is lower than the bottom diversion outlet input elevation substituted, when identical water level and the cross-section of river, the ecological drainage tunnel import depth of water is big, corresponding discharge capacity is big, as ecological drainage tunnel Inlet water can increase about 1.4 times as deep as discharge capacity during to 2 times of the bottom diversion outlet import depth of water.
(3) diversion tunnel reconstruction utilizes implement the dry season in dam construction later stage, and difficulty of construction is little, is independent of each other with dam construction, is conducive to shortening the dam construction duration, obtains power benefit in advance.
(4) the ecological drainage tunnel that water conservancy diversion reconstruction camber gate controls, hydraulics is similar with bottom diversion outlet, safe and reliable to operation; Construction investment is few, has good Technical Economy.
(5) except arch dam, for adopting the concrete gravity dam of tunnel diversion mode, earth and rockfill dam, technical solutions of the utility model can be adopted equally, reduce or cancel concrete gravity dam bottom diversion outlet, reduce earth and rockfill dam bank high level diversion tunnel, there is good Technical Economy.
Accompanying drawing explanation
Fig. 1 is the ecological drainage tunnel profilograph of diversion tunnel reconstruction.
Fig. 2 is the ecological drainage tunnel drawing in side sectional elevation of diversion tunnel reconstruction.
In figure: diversion tunnel 1 to be rebuilt, diversion tunnel A section 1.1, ecological drainage tunnel 1.2, ecological drainage tunnel drainage gallery 1.2.1, diversion tunnel B section 1.3, concrete reconstruction body A2, concrete reconstruction body B3, gates of segmental shape 4.
Detailed description of the invention
Below in conjunction with accompanying drawing, performance of the present utility model is described, but they are not intended that restriction of the present utility model, only for example. Simultaneously by illustrating that advantage of the present utility model will become clearer from easy to understand.
With reference to shown in Fig. 1-2: the ecological drainage tunnel that diversion tunnel reconstruction controls for gates of segmental shape, it includes diversion tunnel 1 to be rebuilt, and described transformation diversion tunnel 1 is divided into diversion tunnel A section 1.1, ecological drainage tunnel 1.2, diversion tunnel B section 1.3; The front end of the afterbody of described diversion tunnel A section 1.1 and ecological drainage tunnel 1.2 is mutually communicated; Diversion tunnel B section 1.3 is positioned at the end of described diversion tunnel to be rebuilt 1 and puts end.
The concreting closure of described ecological drainage tunnel 1.2 is made a concrete reconstruction body A2, and described concrete reconstruction body A2 makes ecological drainage tunnel 1.2 form a drainage gallery 1.2.1; It is provided with concrete reconstruction body B3 at the rear of described ecological drainage tunnel 1.2, described concrete reconstruction body B3 is provided with the gates of segmental shape 4 that can control aperture; The tall and big hole in ecological drainage tunnel 1.2, hole of described diversion tunnel to be rebuilt 1 is high; Described diversion tunnel A section 1.1 keeps consistent with diversion tunnel B section 1.3 with the described original size of diversion tunnel to be rebuilt 1.
The method that the reconstruction of this utility model diversion tunnel controls ecological drainage tunnel for gates of segmental shape, comprises the steps:
1., dam construction middle and late stage before the lock water-retention phase under diversion tunnel, from diversion tunnel, the diversion tunnel to be rebuilt 1 selected as ecological flow flood discharge passage is transformed, and selected diversion tunnel 1 to be rebuilt is divided into diversion tunnel A section 1.1, ecological drainage tunnel 1.2, diversion tunnel B section 1.3;
The size of 2., described diversion tunnel A section 1.1 keeps the afterbody of consistent and described diversion tunnel A section 1.1 to be mutually communicated with the front end of ecological drainage tunnel 1.2 with the described original size of diversion tunnel to be rebuilt 1;
3., described ecological drainage tunnel 1.2 is divided into M, N two sections;
M section: described ecological drainage tunnel 1.2 made concrete reconstruction body A2 with concreting, described concrete reconstruction body A2 makes ecological drainage tunnel 1.2 form a drainage gallery 1.2.1;
N section: N section is positioned at the rear of described ecological drainage tunnel drainage gallery 1.2.1 outlet;By concreting N section, form concrete reconstruction body B3, described concrete reconstruction body B3 is provided with the gates of segmental shape 4 that can control aperture;
4., diversion tunnel B section 1.3 be positioned at the end of described diversion tunnel to be rebuilt 1 and put end, current are by, after reconstructing the ecological drainage tunnel 1.2 formed, flowing out after entering diversion tunnel B section 1.2.
The hole height HD of described diversion tunnel to be rebuilt 1 is more than the hole height H of ecological drainage tunnel 1.2.
Described diversion tunnel A section 1.2 keeps consistent with diversion tunnel B section 1.3 with the described original size of diversion tunnel to be rebuilt 1.
Step 1. in, select any one as diversion tunnel 1 to be rebuilt from diversion tunnel.
Adopt technical solutions of the utility model, Wudongde Hydro-power Station water-retention phase diversion tunnel Reconstruction plan has been carried out technical research. This engineering dam is the extra-high arch dam of height of dam 270m, have the water-retention phase require not stop, representativeness that big flow discharges water.
Civil engineering flow process of the present utility model is as follows:
The first step: extra-high arch dam construction later stage, selects to implement diversion tunnel 1 to be rebuilt dry season before lock water-retention under diversion tunnel and reconstructs.
Second step: according to diversion tunnel 1 input elevation to be rebuilt and dry season water level relation, is formed dry in hole reconstruct execution conditions as desired by arranging the different modes such as cofferdam, lower lock diversion tunnel import bulkhgead gate.
3rd step: diversion tunnel is reconstructed section concrete lining cutting and carries out the process such as dabbing, according to ecological drainage tunnel structure reinforcement placing, built-in fitting etc., casting concrete reconstruction body A2, concrete reconstruction body B3 etc. form ecology drainage tunnel civil engineering structure.
4th step: install gates of segmental shape 4, the ecological drainage tunnel that diversion tunnel reconstruction controls for gates of segmental shape has been implemented.
The diversion tunnel in crow East Germany power station adopts 4 low 1 high layouts, low diversion tunnel cross dimensions is that 16.5m × 24m is (wide × high, lower same), high diversion tunnel cross dimensions 12m × 16m, height diversion tunnel input elevation difference 18m, adopts the ecological drainage tunnel that the reconstruction of high diversion tunnel is controlled by this utility model method for gates of segmental shape, the ecological long 45m of drainage tunnel, rectangular cross section is of a size of 6m × 4.3m, and Outlet Section is of a size of 6m × 3.7m. By researching and analysing, its advantage of technical solutions of the utility model and good effect are as follows:
(1) downstream Rive flood routing problem during reservoir filling during lock under diversion tunnel blocks is solved, it is possible to meet and let out 385m under crow East Germany power station3The big flow of/s discharges water requirement, eliminates a series of adverse effects such as the downstream river course stock of fish, industrial and agricultural production and life water intaking, views.
(2) avoid arranging bottom diversion outlet at the low elevation position of induced joint dam body, improve dam body stress distribution, dam structure safety is favourable.
(3) diversion tunnel reconstructed is become the gates of segmental shape dash of a 6m × 3.7m from the bulkhgead gate of two 7.5m × 16m, and gate dash water pressure is obviously reduced; Plane gate high water head dynamic water blockage door problem when avoiding diversion tunnel directly as ecological drainage tunnel.
The investment of (4) bottom diversion outlet is about 4000-5000 ten thousand yuan, and the expense that diversion tunnel reconstruction is ecological drainage tunnel is about 10,000,000 yuan, and therefore technical solutions of the utility model can save engineering direct investment more than 75,000,000 yuan.
(5) avoid bottom diversion outlet and arranging of supporting gate slot thereof to affect dam concrete pouring construction progress, it is not necessary to arrange the interim opening and closing device of gate, dam construction phase 2-3 month can be shortened.Crow East Germany power station one monthly average generated energy 5.4 hundred million KWh of first two units, dam body does not set bottom diversion outlet to shift to an earlier date generating in 2-3 month and can increase benefit about 3.6 hundred million yuan, and the power benefit of increase is fairly obvious.
(6) technical solutions of the utility model extend diversion tunnel reconstruction pattern, the lock water-retention phase under diversion tunnel that provides does not stop, big flow discharges water, maintain river ecological, reduce diversion tunnel gate dash water pressure, avoid diversion tunnel plane gate high water head to move the new method of water blockage door, is of value to the development of extra-high arch dam construction construction technique.
Above-mentioned unspecified part is prior art.
Claims (4)
1. the ecological drainage tunnel that diversion tunnel reconstruction controls for gates of segmental shape, it includes diversion tunnel to be rebuilt (1), it is characterised in that: described transformation diversion tunnel (1) is divided into diversion tunnel A section (1.1), ecological drainage tunnel (1.2), diversion tunnel B section (1.3); The front end of the afterbody of described diversion tunnel A section (1.1) and ecological drainage tunnel (1.2) is mutually communicated; Diversion tunnel B section (1.3) is positioned at the end of described diversion tunnel to be rebuilt (1) and puts end.
2. the ecological drainage tunnel that diversion tunnel according to claim 1 reconstruction controls for gates of segmental shape, it is characterized in that: described ecological drainage tunnel (1.2) is made concrete reconstruction body A (2) by concreting, described concrete reconstruction body A (2) makes ecological drainage tunnel (1.2) form a drainage gallery (1.2.1).
3. the ecological drainage tunnel that diversion tunnel according to claim 1 reconstruction controls for gates of segmental shape, it is characterized in that: be provided with concrete reconstruction body B (3) at the rear of described ecological drainage tunnel (1.2), described concrete reconstruction body B (3) is provided with the gates of segmental shape (4) that can control aperture.
4. the ecological drainage tunnel that the diversion tunnel reconstruction according to any one in claim 1-3 controls for gates of segmental shape, it is characterised in that: the tall and big hole in ecological drainage tunnel (1.2), hole of described diversion tunnel to be rebuilt (1) is high; Described diversion tunnel A section (1.1) keeps consistent with diversion tunnel B section (1.3) with described diversion tunnel to be rebuilt (1) original size.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521068823.4U CN205314072U (en) | 2015-12-18 | 2015-12-18 | Ecology that diversion tunnel reconstruction was controlled for radial gate hole of draining |
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| CN201521068823.4U CN205314072U (en) | 2015-12-18 | 2015-12-18 | Ecology that diversion tunnel reconstruction was controlled for radial gate hole of draining |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386426A (en) * | 2015-12-18 | 2016-03-09 | 长江勘测规划设计研究有限责任公司 | Construction for transforming diversion tunnel into ecological drainage tunnel controlled by radial gate and method for construction |
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2015
- 2015-12-18 CN CN201521068823.4U patent/CN205314072U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386426A (en) * | 2015-12-18 | 2016-03-09 | 长江勘测规划设计研究有限责任公司 | Construction for transforming diversion tunnel into ecological drainage tunnel controlled by radial gate and method for construction |
| CN105386426B (en) * | 2015-12-18 | 2018-04-20 | 长江勘测规划设计研究有限责任公司 | The ecological drainage tunnel and method that diversion tunnel reconstruction controls for gates of segmental shape |
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