CN110965822A - Hydropower station underground powerhouse self-flowing drainage system - Google Patents
Hydropower station underground powerhouse self-flowing drainage system Download PDFInfo
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- CN110965822A CN110965822A CN201911355473.2A CN201911355473A CN110965822A CN 110965822 A CN110965822 A CN 110965822A CN 201911355473 A CN201911355473 A CN 201911355473A CN 110965822 A CN110965822 A CN 110965822A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
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Abstract
The invention discloses a hydropower station underground powerhouse self-flowing drainage system, which comprises an underground main powerhouse, a main transformer chamber and a tail gate chamber which are sequentially arranged, wherein a continuous annular self-flowing drainage hole is dug from top to bottom around the underground main powerhouse, the main transformer chamber and the tail gate chamber, the drainage hole automatically flows to a drainage hole outlet on the ground surface, the section of the drainage hole is circular, and TBM construction is adopted. After the groundwater is collected in the drainage hole, the groundwater is drained in a self-flowing mode. The invention is suitable for hydropower station underground workshop engineering with the arrangement of the self-flowing drainage hole, is beneficial to reducing the underground water level around the underground main workshop, the main transformer chamber and the tail lock chamber of the hydropower station, simplifies the design of the conventional drainage system, does not need mechanical pumping of collected underground water, improves the reliability of the drainage system of the underground cavern, and realizes the intrinsic safety of the underground drainage system.
Description
Technical Field
The invention relates to a drainage system of a hydraulic structure, in particular to a gravity drainage system of an underground powerhouse of a hydropower station.
Background
In the design of an underground main power house, a main transformer chamber and a tail lock chamber of a hydropower station, for reducing the height of underground water level, improving the structural stability of the underground cavern and meeting the operation management requirement of the power station, a drainage hole is usually arranged in the peripheral area of the underground cavern so as to reduce the underground water level of the underground main power house, the main transformer chamber and the tail lock chamber. Generally, drainage galleries of an underground main workshop, a main transformer room and a tail lock room are arranged into 3 layers according to elevations, each layer of drainage hole is a closed rectangle, and concentrated water flows of the drainage holes with different elevations are drained from bottom to top to the lowest layer of drainage hole through water falling holes between the layers; the length of each layer of drainage hole is not more than 1.5 km; the section of each layer of drainage hole is designed according to the construction requirements of a drilling and blasting method, an urban portal shape is adopted, and the section size is not less than 4 multiplied by 3 (width multiplied by height).
However, the related art drainage hole has the following problems: 1. the existing drainage holes are arranged in a layered mode, only a drilling and blasting method can be adopted in single-layer construction, the construction efficiency is low, and the working environment is poor; 2. the existing drainage holes are independently arranged in layers, water is drained from top to bottom among the layers through the water falling holes, the whole drainage system can only play a role after three layers of drainage holes and the interlayer water falling holes are formed, but the forming time of construction channels of each layer of drainage holes is inconsistent, the construction speed of each layer is slow, the drainage holes in each layer are difficult to complete simultaneously, the forming time of the whole drainage system is late, and the role of reducing the water level of an underground cavern cannot be played before the excavation of an underground powerhouse system of a hydropower station is completed; 3. in the design of the existing partial drainage holes, a water pump is required to be arranged to pump and drain collected water into the drainage holes, the drainage pump must be maintained periodically, and the operation and maintenance work of a drainage system is relatively large; 4. the existing drainage holes are constructed by adopting a drilling and blasting method, the construction quality is not easy to control, the excess excavation amount is large, the flatness is poor, the integrity of surrounding rocks of the hole wall is easy to damage due to blasting vibration, and therefore, a supporting measure is required to be added.
Disclosure of Invention
The invention aims to solve the technical problem of providing the automatic drainage system of the underground powerhouse of the hydropower station, which is suitable for TBM construction, advanced in technology, high in construction safety and wide in applicability, can reduce the underground water level of the underground cavern group of the hydropower station as early as possible through the TBM construction, simplifies the drainage mode of the underground cavern and improves the intrinsic safety of the drainage system.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a power station underground powerhouse drainage system that flows automatically, power station underground powerhouse is including the underground main powerhouse, main room, the tail lock room that arrange in proper order, and the continuous cyclic annular drainage hole that flows that excavates into from top to bottom around underground main powerhouse, main room, the tail lock room that becomes, and the drainage hole exports to the drainage hole of earth's surface that flows automatically, and the drainage hole section is circular, adopts the TBM construction.
The design elevation of the ventilation hole of the underground main workshop is a drainage hole starting point control elevation, the drainage hole takes the ventilation hole of the underground main workshop as a starting point, the drainage hole is continuously and annularly arranged from the starting point to the bottom, underground water around the underground main workshop, the main transformer chamber and the tail gate chamber and collected water in each hole are collected along the way, and the underground water is drained in a centralized manner.
And the drainage hole is designed to have a bottom elevation by the underground main power house finally passing through the underground main power house so as to ensure that the collected water of the underground cavern of the hydropower station and the underground water around the underground cavern are intensively drained to the drainage hole.
The outlet of the drainage hole is lower than the designed bottom elevations of the underground main workshop, the main transformer chamber and the tail lock chamber, so that the underground water is intensively drained in a slope descending mode in the whole course of the drainage hole.
And the outlet of the drainage hole is arranged on the ground surface, so that underground water is naturally gathered into rivers or valleys nearby, and the TBM construction is facilitated.
The drainage tunnel is designed into a longitudinal slope in a slope descending manner from a starting point to a terminal point, and the longitudinal slope in the slope descending direction is 0.5% -10%; the drainage hole is a circular section, and the diameter of the section is not less than 2.5 m.
The invention has the beneficial effects that: the method is suitable for the requirements of TBM excavation construction, has wide application range, high construction speed and high construction safety, and has the characteristics of high efficiency, safety and stability for reducing the underground water level around the underground cavern of the hydropower station.
Drawings
Fig. 1 is a schematic layout of the gravity drainage system of the underground powerhouse of the hydropower station.
Fig. 2 is a typical arrangement pattern of the drainage holes of the present invention.
FIG. 3 is a cross-sectional view of a drainage hole of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
as shown in fig. 1 to 3, the hydropower station underground powerhouse self-flowing drainage system comprises an underground main powerhouse 2, a main transformer chamber 3 and a tail gate chamber 4 which are sequentially arranged, a continuous annular self-flowing drainage tunnel 1 is dug from top to bottom around the underground main powerhouse 2, the main transformer chamber 3 and the tail gate chamber 4, the drainage tunnel 1 automatically flows to a drainage tunnel outlet 10 on the ground surface, the section of the drainage tunnel is circular, and the construction is carried out by adopting TBM.
The design elevation of the ventilation hole 5 of the underground main workshop 2 is the starting point control elevation of the drainage hole 1, the drainage hole 1 takes the ventilation hole 5 of the underground main workshop as the starting point, the ventilation hole 5 is continuously and annularly arranged downwards from the starting point, and water collection of the underground main workshop 2, the main transformer chamber 3 and the tail gate chamber 4 and underground water around the underground main workshop are collected along the way and are intensively discharged. And finally, the drainage hole 1 passes through the designed bottom elevation 7 of the underground main power house 2, and meanwhile, the drainage hole elevation control point 8 is lower than the designed bottom elevation 7 of the underground main power house 2, so that underground water around the underground cavern of the hydropower station is intensively drained to the drainage hole 1. And the outlet 10 of the drainage hole is lower than the designed bottom elevations of the underground main workshop 2, the main transformer chamber 3 and the tail gate chamber 4 and the control point 8 of the elevation of the drainage hole, so that the underground water is intensively drained in a slope descending mode in the whole course of the drainage hole. The drainage hole outlet 10 is arranged on the ground surface, so that underground water can naturally flow into rivers or valleys nearby, and the drainage hole 1 can be conveniently constructed by the TBM; the drainage tunnel 1 is designed into a longitudinal slope in a slope descending manner from a starting point to a terminal point, and the longitudinal slope in the slope descending direction is 0.5% -10%; the drainage hole 1 is a circular section, and the diameter of the section is not less than 2.5 m.
Specifically, according to underground water distribution and the arrangement conditions of an underground main workshop, a main transformer chamber and a tail gate chamber, the drainage tunnel 1 is determined to be selected at the positions around the underground main workshop, the main transformer chamber and the tail gate chamber and close to a construction channel, and the drainage tunnel 1 is arranged into a continuous annular arrangement type with a circular section according to the requirements of TBM excavation construction. The drainage tunnel 1 is constructed by TBM, the diameter is not less than 2.5m, and the length, the longitudinal slope and the turning radius of the curve section of the drainage tunnel can be determined according to the arrangement of an underground main plant, a main transformer chamber and a tail gate chamber, the topographic conditions of an engineering area and the working performance requirements of the TBM.
After the excavation construction of the drainage hole 1 is completed, the water collection in the underground main plant, the main transformer chamber and the tail gate chamber and the underground water in the rock mass around the underground main plant, the main transformer chamber and the tail gate chamber are concentrated at the lowest part of the section of the drainage hole through the drainage hole of the wall of the drainage hole, flow down along the designed slope of the drainage hole 1 and flow together to the elevation control point 8 of the drainage hole, and finally are discharged to the ground surface through the self-flowing drainage hole. 8 is a drainage hole elevation control point; all turns of the gravity drainage system are indicated at 9.
In the last decade, the development of domestic TBM equipment is rapid, the TBM construction technology is mature day by day, and in order to adapt to TBM construction and facilitate the operation management of a hydropower station, the continuous annular self-flow type integral drainage system has a circular section, so that the intrinsic safety of the drainage system of the underground cavern of the hydropower station is improved, and the advantages of TBM construction are fully exerted.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to carry out the same, and the present invention shall not be limited to the embodiments, i.e. the equivalent changes or modifications made within the spirit of the present invention shall fall within the scope of the present invention.
Claims (6)
1. The utility model provides a power station underground powerhouse drainage system that flows automatically, power station underground powerhouse is including underground main powerhouse (2), main room (3), the tail gate room (4) that arrange in proper order, its characterized in that, around underground main powerhouse (2), main room (3), tail gate room (4) top-down excavates into continuous cyclic annular drainage hole (1) that flows automatically, drainage hole (1) are from water drainage hole export (10) to the earth's surface, and the drainage hole section is circular, adopts the TBM construction.
2. The hydropower station underground powerhouse gravity drainage system according to claim 1, characterized in that the design elevation of the ventilation hole (6) of the underground main powerhouse (2) is the control elevation of the starting point of the drainage hole (1), the drainage hole (2) is continuously and annularly arranged from the beginning of the ventilation hole (6) of the underground main powerhouse downwards, and the underground main powerhouse (2), the main transformer chamber (3), the tail gate chamber (4) and the collected water in each powerhouse are collected along the way and are intensively drained away.
3. The gravity drainage system for the underground powerhouse of the hydropower station according to claim 2, wherein the drainage hole (2) passes through the designed bottom elevation (7) of the underground main powerhouse (2) finally, so that underground water around the underground cavern of the hydropower station is ensured to be drained to the drainage hole (1) in a centralized manner.
4. The gravity drainage system for the underground powerhouse of the hydropower station according to claim 1, wherein the outlet (10) of the drainage hole is lower than the designed bottom elevations of the underground main powerhouse (2), the main transformer chamber (3) and the tail gate chamber (4), so that the drainage hole can intensively drain the underground water in a slope descending manner in the whole process.
5. The gravity drainage system for the underground powerhouse of the hydropower station according to claim 4, wherein the drainage hole outlet (10) is arranged on the ground surface, so that underground water is naturally gathered into rivers or valleys nearby, and TBM construction is facilitated.
6. The gravity drainage system for the underground powerhouse of the hydropower station according to claim 4, wherein the drainage hole (1) is a longitudinal slope designed in a slope descending manner from a starting point to a terminal point, and the longitudinal slope in the slope descending direction is 0.5-10%; the drainage hole is a circular section, and the diameter of the section is not less than 2.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911355473.2A CN110965822A (en) | 2019-12-25 | 2019-12-25 | Hydropower station underground powerhouse self-flowing drainage system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911355473.2A CN110965822A (en) | 2019-12-25 | 2019-12-25 | Hydropower station underground powerhouse self-flowing drainage system |
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| CN110965822A true CN110965822A (en) | 2020-04-07 |
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| CN201911355473.2A Pending CN110965822A (en) | 2019-12-25 | 2019-12-25 | Hydropower station underground powerhouse self-flowing drainage system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089705A (en) * | 2021-04-21 | 2021-07-09 | 中国电建集团中南勘测设计研究院有限公司 | Underground cavern drainage system |
| CN114991282A (en) * | 2022-07-05 | 2022-09-02 | 中国电建集团华东勘测设计研究院有限公司 | Underground factory building spiral drainage gallery excavation arrangement form and excavation method |
-
2019
- 2019-12-25 CN CN201911355473.2A patent/CN110965822A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089705A (en) * | 2021-04-21 | 2021-07-09 | 中国电建集团中南勘测设计研究院有限公司 | Underground cavern drainage system |
| CN113089705B (en) * | 2021-04-21 | 2022-07-19 | 中国电建集团中南勘测设计研究院有限公司 | Underground cavern drainage system |
| CN114991282A (en) * | 2022-07-05 | 2022-09-02 | 中国电建集团华东勘测设计研究院有限公司 | Underground factory building spiral drainage gallery excavation arrangement form and excavation method |
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