CN108677892B - Reconstruction structure for ecological water supply tunnel by diversion tunnel construction branch tunnel - Google Patents
Reconstruction structure for ecological water supply tunnel by diversion tunnel construction branch tunnel Download PDFInfo
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- CN108677892B CN108677892B CN201810840336.7A CN201810840336A CN108677892B CN 108677892 B CN108677892 B CN 108677892B CN 201810840336 A CN201810840336 A CN 201810840336A CN 108677892 B CN108677892 B CN 108677892B
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- 238000010276 construction Methods 0.000 title claims abstract description 192
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 230000007704 transition Effects 0.000 claims abstract description 19
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 4
- 230000006872 improvement Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000002407 reforming Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 241000282693 Cercopithecidae Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- 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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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a reconstruction structure for using a diversion tunnel construction branch hole as an ecological water supply hole in the field of hydraulic and hydroelectric engineering, which comprises the diversion tunnel, an upper construction branch hole and a lower construction branch hole, wherein the upper construction branch hole and the lower construction branch hole are arranged beside the diversion tunnel, the outlets of the upper construction branch hole and the lower construction branch hole are communicated with the diversion tunnel, the outlet end of the upper construction branch hole is connected with the diversion tunnel through arc transition, the radius of the arc transition section is more than 5 times of the hole diameter of the construction branch hole, and a water retaining gate is arranged at the joint of the upper construction branch hole and the diversion tunnel. The beneficial effects of the invention are as follows: the special ecological water supply hole is omitted, and the cost and the construction period are saved; constructing branch holes as traffic holes for diversion tunnel construction in the construction period of the diversion tunnel; the normal diversion function of the diversion tunnel is ensured by arranging the plugging plug and the water retaining gate in the construction period of the dam; the dam water storage period solves the problems that the gate-falling water storage period of the diversion tunnel of the high earth and rockfill dam is continuous and the water level rise of the reservoir is not easy to control.
Description
Technical Field
The invention relates to the field of water conservancy and hydropower engineering, in particular to a transformation structure for transforming a diversion tunnel construction branch tunnel of a high earth and rockfill dam into a ecological water supply tunnel.
Background
At present, a plurality of large-scale ultra-high earth-rock dam hydroelectric projects are built in the mountain canyon area in the southwest area of China, such as double-river mouths, two river mouths, long river dams, monkey rocks and the like, and the construction diversion of the projects adopts a mode of blocking a cofferdam once and draining a diversion tunnel.
The engineering scale of the high earth and rockfill dam is large, the construction period is long, the water storage difficulty of the gate is high, and a plurality of complex factors are involved, so that the method has the following difficulties: the downstream is not cut off, and the downward leakage flow is required to meet the requirement of ecological water supply flow; the water level rising speed needs to be controlled in the water storage period so as to ensure the safety of the earth-rock dam body. At present, an ecological water supply hole is generally required to be specially arranged on the high earth and rockfill dam to meet the requirements. However, the engineering scale of specially setting an ecological water supply hole is large, the investment is high, and the construction period is long.
Disclosure of Invention
In order to overcome the defects of high cost, long construction period and the like caused by the fact that a special ecological water supply hole is required to be arranged in the existing high earth-rock dam, the invention aims to solve the technical problems that: the utility model provides a can reform transform the diversion tunnel construction branch hole, reform transform structure as ecological water supply's hole with the diversion tunnel.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a diversion tunnel construction branch hole is used as ecological water supply hole's transformation structure, including diversion tunnel and the construction branch hole of setting in diversion tunnel side, construction branch hole divide into construction branch hole and lower construction branch hole, and wherein go up the entry and river course intercommunication of construction branch hole, export and diversion tunnel intercommunication, the entry and the last construction branch hole of lower construction branch hole link to each other, export and diversion tunnel intercommunication, the one end that goes up construction branch hole and diversion tunnel link to each other is equipped with the gate, and the gate upstream side is equipped with the radial gate lock chamber, the junction of construction branch hole and diversion tunnel is equipped with the shutoff end cap down, the junction of last construction branch hole and lower construction branch hole is equipped with the connection end cap.
Further, the outlet end of the upper construction branch hole is connected with the diversion tunnel through arc transition.
Further, the radius of the arc transition section is more than 5 times of the hole diameter of the construction branch hole, and the rotation angle is less than 60 degrees.
Further, the inlet of the lower construction branch hole is connected with the arc-shaped transition section of the upper construction branch hole, and the upstream surface of the connecting plug is an arc surface matched with the arc-shaped transition section of the upper construction branch hole.
Further, a lining structure section is arranged in the outlet end of the upper construction branch hole, the gate and the arc-shaped gate chamber are arranged in the lining structure section, and a gradual transition section is arranged at one end, far away from the diversion hole, of the lining structure section.
The construction method for the reconstruction structure for constructing the branch hole serving as the ecological water supply hole by using the diversion tunnel comprises the following steps of:
a. in the construction period of the diversion tunnel, the upper construction branch tunnel and the lower construction branch tunnel are used as traffic tunnels for diversion tunnel construction;
b. After the diversion tunnel construction is completed, a blocking plug is arranged at the outlet end of the lower construction branch tunnel, and a gate is arranged at the outlet end of the upper construction branch tunnel;
c. In the construction period of the dam, firstly, a gate is used for blocking a construction branch hole, and river water flowing through the diversion hole is utilized, then, a dam cofferdam is constructed, and dam construction is carried out;
d. After the dam construction is completed, the gate in the upper construction branch hole is removed firstly in the water storage period of the lower gate of the diversion tunnel, then the arc gate chamber in the upper construction branch hole is regulated to enable ecological water to flow through the upper construction branch hole to the diversion tunnel, and meanwhile, the water level rising of the reservoir can be controlled;
e. after the dam reaches the water storage requirement, closing an arc door lock chamber in the upper construction branch hole to stop water supply, and then setting a permanent plug between the arc door lock chamber of the upper construction branch hole and the diversion tunnel to finish reconstruction.
Further, in the dry period during water passing by using the diversion tunnel, a cofferdam is arranged at the inlet of the upper construction branch tunnel, and then the upper construction branch tunnel is rebuilt.
The beneficial effects of the invention are as follows:
1. By reconstructing the construction branch hole into the ecological water supply hole, the project of resetting one ecological water supply hole is omitted, good economic benefit is achieved, and the construction period is greatly shortened;
2. The construction branch holes have different functions in different periods, and the construction branch holes are used as traffic holes for diversion tunnel construction in the construction period of the diversion tunnel; the normal diversion function of the diversion tunnel is ensured by arranging the plugging plug and the water retaining gate in the construction period of the dam; the dam water storage period well solves the problem that the water level rising of the high earth-rock dam reservoir is difficult to control as the water storage period of the diversion tunnel of the high earth-rock dam is not cut off, the requirement of downstream ecological flow is met;
3. Gradually reforming, fully utilizing the characteristics of construction diversion of high earth and rockfill dams in different periods, and performing subsequent reforming on the basis of the previous reforming, so that the construction period pressure of later construction can be greatly relieved, and the construction period of a key line is shortened.
Drawings
FIG. 1 is a schematic diagram of a diversion tunnel construction period.
FIG. 2 is a schematic diagram of a dam construction period.
FIG. 3 is a schematic diagram of the structure of the diversion tunnel under-gate water storage period.
Fig. 4 is a schematic view of the structure after the water storage is completed.
Fig. 5 is a schematic view of a structural section of the radial gate.
The drawing is marked as 1-diversion tunnel, 2-upper construction branch tunnel, 3-lower construction branch tunnel, 21-gate, 22-arc transition section, 23-lining structure section, 24-permanent plug, 25-arc gate chamber, 31-blocking plug and 32-connecting plug.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, fig. 2 and fig. 3, the diversion tunnel construction branch hole is used as an ecological water supply tunnel reconstruction structure and comprises a diversion tunnel 1 and a construction branch hole arranged at the side of the diversion tunnel 1, wherein the construction branch hole is divided into an upper construction branch hole 2 and a lower construction branch hole 3, an inlet of the upper construction branch hole 2 is communicated with a river channel, an outlet of the upper construction branch hole is communicated with the diversion tunnel 1, an inlet of the lower construction branch hole 3 is connected with the upper construction branch hole 2, an outlet of the upper construction branch hole is communicated with the diversion tunnel 1, a gate 21 is arranged at one end of the upper construction branch hole 2 connected with the diversion tunnel 1, an arc gate chamber 25 is arranged at the upstream side of the gate 21, a blocking plug 31 is arranged at the joint of the lower construction branch hole 3 and the diversion tunnel 1, and a connecting plug 32 is arranged at the joint of the upper construction branch hole 2 and the lower construction branch hole 3. After the structure transformation construction is completed, the upper construction branch hole 2 can be plugged by the gate 21 and the lower construction branch hole 3 can be plugged by the plugging plug 31 in the water passing period of the diversion tunnel; in the period of water storage of the diversion tunnel 1, the gate 21 can be dismantled, the arc gate chamber 25 is utilized for control, so that the upstream river water enters the diversion tunnel 1 along the upper construction branch tunnel 2 and flows to the downstream to form ecological water supply, the project of resetting an ecological water supply tunnel is omitted, good economic benefit is achieved, and the construction period is greatly shortened. The arcuate door lock chamber 25 is shown in the specific configuration of fig. 5 with an open top for easy installation and adjustment of the arcuate door lock chamber 25.
The purpose of setting the connection plug 32 is that if the connection plug 32 is not provided, when ecological water flows through, although the outlet end of the lower construction branch hole 3 is blocked by the plugging plug 31, water cannot flow through, after river water fills the lower construction branch hole 3, new water flow still forms impact turbulence at the connection part of the upper construction branch hole 2 and the lower construction branch hole 3, the requirement of downstream ecological water supply cannot be met, and water is required to be pumped out later due to lower position of the lower construction branch hole 3, which is more troublesome and increases useless engineering. And after the connecting plugs 32 are arranged, water flows directly flow through the upper construction support holes 2, so that the paths are reduced, and the projects of reconstruction, reinforcement and the like of the construction support holes are reduced.
The construction method of the improved structure comprises the following steps:
a. In the construction period of the diversion tunnel, the upper construction branch tunnel 2 and the lower construction branch tunnel 3 are used as traffic tunnels for constructing the diversion tunnel 1, and the completed structure is shown in figure 1;
b. After the diversion tunnel construction is completed, a blocking plug 31 is arranged at the outlet end of the lower construction branch tunnel 3, a gate 21 and an arc-shaped gate chamber 25 are arranged at the outlet end of the upper construction branch tunnel 2, and the completed structure is shown in figure 2;
c. in the construction period of the dam, a gate 21 is used for blocking a construction branch hole 2, river water flowing through the diversion tunnel 1 is utilized, then a dam cofferdam is constructed, and dam construction is carried out;
d. after the dam construction is completed, the gate 21 in the upper construction branch hole 2 is removed firstly in the water storage period of the lower gate of the diversion tunnel 1, then the ecological water is overflowed from the upper construction branch hole 2 to the diversion tunnel 1 by adjusting the arc-shaped gate chamber 25 in the upper construction branch hole 2, and meanwhile, the water level rise of the reservoir can be controlled, as shown in figure 3;
e. after the dam meets the water storage requirement, closing the arc door lock chamber 25 of the upper construction branch hole 2 to stop water supply, and then arranging a permanent plug 24 between the arc door lock chamber 25 of the upper construction branch hole 2 and the diversion tunnel 1, wherein the structure after reconstruction is completed is shown in figure 4.
By modifying the traditional construction branch hole, the construction branch hole has different functions in different periods, and the construction branch hole is used as a traffic hole for diversion tunnel construction in the construction period of the diversion tunnel 1; the normal diversion function of the diversion tunnel 1 is ensured by arranging the plugging plug 31 and the gate 21 in the construction period of the dam; the dam water storage period better solves the problem that the water level of the high earth-rock dam reservoir is difficult to control because the water level of the high earth-rock dam is not easy to rise, and the water storage period is continuous in the gate-falling water storage period of the diversion tunnel of the high earth-rock dam, thereby meeting the requirement of downstream ecological flow. The whole reconstruction engineering is gradual reconstruction, the characteristics of construction diversion of high earth and rockfill dams in different periods are fully utilized, and the subsequent reconstruction is carried out on the basis of the previous reconstruction, so that the construction period pressure of later-stage construction can be greatly relieved, and the construction period of a key line is shortened.
Because the main road of the construction branch hole is generally parallel to the diversion tunnel 1, when the main road is required to be communicated with the diversion tunnel 1, a corner turning diversion tunnel 1 needs to be arranged, the conventional scheme generally adopts a right-angle turning, but in order to reduce the impact of water flow on the construction branch hole during subsequent overcurrent ecological water supply, the outlet end of the upper construction branch hole 2 is connected with the diversion tunnel 1 through an arc-shaped transition section 22. Further, in order to achieve the most smooth flow, the radius of the arc-shaped transition section 22 should be larger than the hole diameter of the construction branch hole 2 by 5 times, and the rotation angle is smaller than 60 degrees.
As shown in fig. 3, the inlet of the lower construction branch hole 3 is connected with the arc-shaped transition section 22 of the upper construction branch hole 2, and in order to be matched with the arc-shaped transition section 22 of the upper construction branch hole 2, the upstream surface of the connecting plug 32 is set to be an arc surface matched with the arc-shaped transition section 22 of the upper construction branch hole 2.
In order to avoid ecological water flow from the upper construction branch hole 2 to form scouring to the outlet of the upper construction branch hole 2 when entering the diversion tunnel 1, a lining structure section 23 is arranged in the outlet end of the upper construction branch hole 2, the gate 21 and the arc-shaped gate chamber 25 are arranged in the lining structure section 23, and one end of the lining structure section 23 far away from the diversion tunnel 1 is provided with a gradual transition section. The lining structure section 23 can simultaneously provide a construction foundation for the subsequent setting of the permanent plugs 24.
Considering the whole construction period, the reconstruction of the upper construction branch hole 2 is preferably carried out in the dry period during the water passing period by utilizing the diversion tunnel 1, specifically, a cofferdam is arranged at the inlet of the upper construction branch hole 2, and then the reconstruction of the upper construction branch hole 2 comprises the gradual change section construction of a connecting plug 32, an arc-shaped gate chamber 25 and a lining structure section 23 at the joint of the upper construction branch hole 2 and the lower construction branch hole 3, so that the upper construction branch hole meets the overcurrent requirement of ecological water supply.
The improved structure fully utilizes the structural characteristics of construction support holes and diversion, the whole project meets the ecological water supply requirement through gradual improvement, the cost and the construction period are saved, different effects are achieved in different construction stages, the problem that the water level of the high earth-rock dam reservoir is difficult to control is solved, and the improved structure has good practicability and application prospect and provides good reference for similar projects.
Claims (5)
1. Diversion tunnel construction branch hole is used as ecological water supply hole's transformation structure, including diversion tunnel (1) and the construction branch hole of setting in diversion tunnel side (1), characterized by: the construction branch hole is divided into an upper construction branch hole (2) and a lower construction branch hole (3), wherein an inlet of the upper construction branch hole (2) is communicated with a river channel, an outlet of the upper construction branch hole is communicated with a diversion hole (1), an inlet of the lower construction branch hole (3) is connected with the upper construction branch hole (2), an outlet of the lower construction branch hole is communicated with the diversion hole (1), a gate (21) is arranged at one end of the upper construction branch hole (2) connected with the diversion hole (1), an arc-shaped gate chamber (25) is arranged at the upstream side of the gate (21), a blocking plug (31) is arranged at the joint of the lower construction branch hole (3) and the diversion hole (1), and a connecting plug (32) is arranged at the joint of the upper construction branch hole (2) and the lower construction branch hole (3); the inner wall of the outlet end of the upper construction branch hole (2) is provided with a lining structure section (23), the gate (21) and the arc-shaped gate chamber (25) are arranged in the lining structure section (23), and one end, far away from the diversion hole (1), of the lining structure section (23) is provided with a gradual transition section.
2. The improvement structure of the diversion tunnel construction branch tunnel as the ecological water supply tunnel according to claim 1, which is characterized in that: the outlet end of the upper construction branch hole (2) is connected with the diversion tunnel (1) through an arc-shaped transition section (22).
3. The modified structure of the diversion tunnel construction branch tunnel as the ecological water supply tunnel according to claim 2, which is characterized in that: the radius of the arc-shaped transition section (22) is larger than the hole diameter of the upper construction support hole (2) by 5 times, and the rotation angle is smaller than 60 degrees.
4. The modified structure of the diversion tunnel construction branch tunnel as the ecological water supply tunnel according to claim 2, which is characterized in that: the inlet of the lower construction branch hole (3) is connected with the arc-shaped transition section (22) of the upper construction branch hole (2), and the upstream surface of the connecting plug (32) is an arc surface matched with the arc-shaped transition section (22) of the upper construction branch hole (2).
5. The construction method for the reconstruction structure of the diversion tunnel construction branch tunnel serving as the ecological water supply tunnel as claimed in claim 1, which is characterized by comprising the following steps:
a. in the construction period of the diversion tunnel, the upper construction branch tunnel and the lower construction branch tunnel are used as traffic tunnels for diversion tunnel construction;
b. after the diversion tunnel construction is completed, a blocking plug is arranged at the outlet end of the lower construction branch tunnel, and a gate and an arc-shaped gate chamber are arranged at the outlet end of the upper construction branch tunnel;
c. In the construction period of the dam, firstly, a gate is used for blocking a construction branch hole, and river water flowing through the diversion hole is utilized, then, a dam cofferdam is constructed, and dam construction is carried out;
d. After the dam construction is completed, the gate in the upper construction branch hole is removed firstly in the water storage period of the lower gate of the diversion tunnel, then the arc gate chamber in the upper construction branch hole is regulated to enable ecological water to flow through the upper construction branch hole to the diversion tunnel, and meanwhile, the water level rising of the reservoir can be controlled;
e. After the dam meets the water storage requirement, closing an arc door lock chamber in the upper construction branch hole to stop water supply, and then arranging a permanent plug between the arc door lock chamber of the upper construction branch hole and the diversion tunnel to finish reconstruction;
in the dead water period during water passing by utilizing the diversion tunnel, a cofferdam is arranged at the inlet of the upper construction branch tunnel, and then the upper construction branch tunnel is rebuilt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810840336.7A CN108677892B (en) | 2018-07-27 | 2018-07-27 | Reconstruction structure for ecological water supply tunnel by diversion tunnel construction branch tunnel |
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| CN201810840336.7A CN108677892B (en) | 2018-07-27 | 2018-07-27 | Reconstruction structure for ecological water supply tunnel by diversion tunnel construction branch tunnel |
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| CN108677892A CN108677892A (en) | 2018-10-19 |
| CN108677892B true CN108677892B (en) | 2024-04-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110258474A (en) * | 2019-06-04 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | It can be used for the ecological diversion tunnel structure that extra-high rock-fill dams major flood season is passed the flood period |
| CN111828050B (en) * | 2020-07-28 | 2022-04-08 | 中铁二局集团有限公司 | Construction method for small-section traffic hole to enter thin and high special-shaped space structure diversion lock chamber |
| CN114673125B (en) * | 2022-03-15 | 2024-06-04 | 长江岩土工程有限公司 | Hydraulic engineering diversion tunnel plugging construction method |
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| JP2007032129A (en) * | 2005-07-28 | 2007-02-08 | Dam Gijutsu Center | Method of construction of dam |
| CN205501957U (en) * | 2016-04-11 | 2016-08-24 | 中国电建集团成都勘测设计研究院有限公司 | Retaining phase downstream water supply system |
| CN106284240A (en) * | 2016-08-29 | 2017-01-04 | 中国电建集团西北勘测设计研究院有限公司 | A kind of power station is in construction time downstream interim water-supply structure and method |
| CN107858990A (en) * | 2017-12-13 | 2018-03-30 | 中国电建集团成都勘测设计研究院有限公司 | The arrangement of Canyon Area high dam ditch engineering of water treatment |
| CN208965520U (en) * | 2018-07-27 | 2019-06-11 | 中国电建集团成都勘测设计研究院有限公司 | Diversion tunnel working tunnel is used as ecology for the reconstruction structure in water hole |
-
2018
- 2018-07-27 CN CN201810840336.7A patent/CN108677892B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007032129A (en) * | 2005-07-28 | 2007-02-08 | Dam Gijutsu Center | Method of construction of dam |
| CN205501957U (en) * | 2016-04-11 | 2016-08-24 | 中国电建集团成都勘测设计研究院有限公司 | Retaining phase downstream water supply system |
| CN106284240A (en) * | 2016-08-29 | 2017-01-04 | 中国电建集团西北勘测设计研究院有限公司 | A kind of power station is in construction time downstream interim water-supply structure and method |
| CN107858990A (en) * | 2017-12-13 | 2018-03-30 | 中国电建集团成都勘测设计研究院有限公司 | The arrangement of Canyon Area high dam ditch engineering of water treatment |
| CN208965520U (en) * | 2018-07-27 | 2019-06-11 | 中国电建集团成都勘测设计研究院有限公司 | Diversion tunnel working tunnel is used as ecology for the reconstruction structure in water hole |
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