CN101446107B - Layered drainage structure of underground powerhouse chamber of hydropower station in water-rich region and construction method thereof - Google Patents
Layered drainage structure of underground powerhouse chamber of hydropower station in water-rich region and construction method thereof Download PDFInfo
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- CN101446107B CN101446107B CN2008101637562A CN200810163756A CN101446107B CN 101446107 B CN101446107 B CN 101446107B CN 2008101637562 A CN2008101637562 A CN 2008101637562A CN 200810163756 A CN200810163756 A CN 200810163756A CN 101446107 B CN101446107 B CN 101446107B
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Abstract
The invention relates to a layered drainage structure of an underground powerhouse chamber of a hydropower station in a water-rich region and a construction method thereof. The technical problem to be solved by the invention is to provide the layered drainage structure of the underground powerhouse chamber of the hydropower station in the water-rich region and the construction method thereof, and the invention aims at effectively reducing the drainage and discharge capacity of the underground powerhouse, reducing the operation cost by power-driven drainage and discharge, and ensuring the safe construction of the underground powerhouse and a safe running period. The technical proposal for solving the problem is as follows: the layered drainage structure of the underground powerhouse chamber of the hydropower station in a water-rich region with great buried depth is provided with the underground powerhouse chamber, the bottom part thereof is provided with a water-collecting well and a power-driven drainage and discharge device, a plurality of layers of drainage galleries are arranged around the underground powerhouse chamber, the various layers of the drainage galleries are all communicated with the water-collecting well, and the layered drainage structure is characterized in that a layer of intercepting gallery is arranged in a mountain body above the underground powerhouse chamber which is higher than the water level of a river course, and the intercepting gallery is communicated with the water-collecting well through a vertical or inclined connecting gallery. The invention can be used for water conservancy and hydropower underground powerhouse chamber projects.
Description
Technical field
The present invention relates to a kind of Fu Shui area underground workshop cavern layering discharge structure and job practices thereof.Be applicable to water conservancy and hydropower underground power house cavity engineering.
Background technology
The power station hydraulic turbine all has certain draught-height requirement, and it is low that unit is installed elevation, is lower than the river water level elevation for its bottom, cavern elevation of underground power house.Because underground power house cavern elevation is low, be positioned under massif groundwater table and the river water level, in the underground power house construction with in the runtime, country rock can seep water in factory building.In order to keep the good running environment of underground power house, generally be collector drain to be set on every side, as shown in Figure 1, get rid of the factory building infiltration of country rock on every side in the underground power house cavern, and the infiltration of the country rock of each layer collector drain focused on the factory building bottom, by power pump drainage equipment pump drainage to factory.The underground power house cavern better for geological conditions, that underground water is abundant, the country rock water percolating capacity is little, it is feasible that the infiltration of the country rock of each layer collector drain is focused on factory building bottom pump drainage, but when the factory building cavern is arranged in the rock in Fu Shui area, the country rock water percolating capacity is big, the mode pump drainage water yield of the concentrated pump drainage of employing is big, running cost is high, may cause the water logging factory building inadequately or during losing station service in the equipment configuration, influences the safe operation of underground power house.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of Fu Shui area underground workshop cavern layering discharge structure and job practices thereof are provided, be intended to effectively reduce the underground power house pump drainage water yield, reduce power pump drainage running cost, ensure underground power house construction and the safety of runtime.
The technical solution adopted in the present invention is: the underground workshop cavern layering discharge structure that Fu Shui area buried depth is big, has the underground power house cavern, its bottom is provided with collecting well and is equipped with power pump drainage equipment, several layers of collector drain are set around the underground power house cavern, each layer collector drain all is communicated with collecting well, it is characterized in that: above the underground power house cavern, be higher than in the massif of river water level, one deck gallery that intercepts water is set, is communicated with by the vertical or oblique gallery that is connected between this intercept water gallery and collecting well.
The drain hole of drainage gallery that intercepts water of leading to massif is set in the gallery that intercepts water.
The described gallery gradient aspect river course that intercepts water, the gallery that intercepts water outlet elevation is higher than river water level.
Connecting the crossover sites of gallery, connecting gallery bottom elevation and be higher than and intercept water gallery or overfall is set with the gallery that intercepts water.
The present invention relates to the job practices of a kind of Fu Shui area underground workshop cavern layering draining, it is characterized in that this method may further comprise the steps:
1) at first excavate the intercept water gallery and the drain hole of drainage gallery that intercepts water, this gallery that intercepts water is positioned at the massif that top, underground power house cavern is higher than river water level, gradient aspect river course, and the outlet elevation of the gallery that intercepts water is higher than river water level;
2) each layer collector drain and the factory building that is communicated with described collector drain drain hole on every side around the excavation underground power house, divide several layers excavation top, underground power house cavern, drain hole should be prior to excavating with elevation underground power house cavern around each layer collector drain reached the factory building that is communicated with described collector drain around the underground power house;
3) excavation bottom, underground power house cavern is provided with collecting well and pump drainage equipment in its bottom, and collecting well is connected with each layer collector drain;
4) be provided with between the outlet of gallery and collecting well intercepting water of upper strata and be connected gallery (4) above vertical or oblique, connecting the crossover sites of gallery with the gallery that intercepts water, the bottom elevation that connects gallery is higher than and intercepts water gallery or overfall is set;
5) local down after end is all excavated by the factory building cavern, the underground infiltration that each layer collector drain around the factory building collected focuses in the collecting well of factory building bottom, utilizes water pump to be pumped in the gallery that intercepts water through connecting gallery, again inflow Ha Noi naturally.
The invention has the beneficial effects as follows: owing to aloft underground water is tackled, for the Fu Shui area, factory building needs the country rock water percolating capacity of pump drainage to reduce greatly.In the construction period, the upper strata gallery that intercepts water is finished prior to the underground power house cavern excavation, can reduce the water yield that pouring in underground power house excavation face, reduces the configuration of interim pump drainage wetting system, guarantees construction safety; Runtime, adopt the layering drainage pattern, can effectively reduce the permanent pump drainage water yield of underground power house, reduce the configuration of the volume and the permanent pump drainage wetting system of collecting well.
Description of drawings
Fig. 1 is the structural representation of background technology of the present invention.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is the partial enlarged drawing that connects the gallery and the gallery junction of intercepting water among the present invention.
The specific embodiment
As shown in Figure 2, present embodiment is applied to underground workshop cavern, Fu Shui area, adopts the mode of layering draining.Underground workshop cavern 2 buried depths are big, build in the massif of groundwater table below 10, and the downstream of massif above-ground route 11 is the river course, and the water level 9 in the river course is higher than underground power house cavern 2.The bottom of underground power house cavern 2 has collecting well 7 and is equipped with power pump drainage equipment, several layers of collector drain 3 are set around the underground power house cavern 2, be drilled with the drain hole 8 that is communicated with collector drain in the massif around every layer of collector drain 3, the infiltration of collector drain 3 all imports collecting well 7.Characteristics of the present invention are: be higher than above underground power house cavern 2 in the massif of river water level, add one deck gallery 1 that intercepts water, the drain hole of drainage gallery 6 that intercepts water of leading to massif is set in the gallery 1 that intercepts water.Be communicated with by the vertical or oblique gallery 4 that is connected between described intercept water gallery 1 and the collecting well 7.
Described gallery 1 gradient aspect river course that intercepts water, the gallery that intercepts water outlet elevation is higher than river water level 9, so that the water spontaneous current is to Ha Noi.
Connecting the crossover sites of gallery 4 with the gallery 1 that intercepts water, described connection gallery 4 bottom elevations should be higher than and intercept water gallery 1 or overfall 5 is set, with the aqueous reflux in the gallery that prevents to intercept water to factory building.
The job practices of present embodiment layering draining step is in the following order constructed:
1) at first excavate the intercept water gallery 1 and the drain hole of drainage gallery 6 that intercepts water, the gallery that intercepts water is positioned at the massif that 2 tops, underground power house cavern are higher than river water level 9, gradient aspect river course, and the outlet elevation of the gallery that intercepts water is higher than river water level 9.Can make the above massif underground water of gallery 1 elevation that intercepts water import the gallery that intercepts water like this, the infiltration in the gallery that intercepts water can flow directly into the river course, and does not need pump drainage.Particularly in the construction period, the upper strata gallery that intercepts water is finished prior to the underground power house cavern excavation, can reduce the water yield that pouring in underground power house excavation face, reduces the configuration of interim pump drainage wetting system, guarantees construction safety.
2) each layer collector drain 3 and the factory building that is communicated with described collector drain drain hole 8 on every side around the excavation underground power house, divide several layers excavation 2 tops, underground power house cavern again, should note each layer collector drain 3 around the underground power house and the factory building that is communicated with described collector drain drain hole 8 must be prior to excavating with elevation underground power house cavern on every side.
3) excavation 2 bottoms, underground power house cavern are provided with collecting well 7 and pump drainage equipment in bottom, underground power house cavern.
4) be provided with between 7 outlets of gallery 1 and collecting well intercepting water of upper strata and be connected gallery 4 above vertical or oblique, connecting the crossover sites of gallery with the gallery that intercepts water, the bottom elevation that connects gallery is higher than and intercepts water gallery or overfall 5 is set.
5) after all excavated and finishes local factory building cavern down 2, the underground infiltration that each layer collector drain around the factory building 3 collected focused in the collecting well 7 of factory building bottom, utilized water pump to be pumped in the gallery 1 that intercepts water through connection gallery 4, flowed into Ha Noi more naturally.
When all-work finishes, after underground workshop enters the runtime, just can adopt the mode of layering draining, the infiltration that intercepts water in the gallery in the upper strata can flow directly into the river course, do not need pump drainage, reduce the permanent pump drainage water yield of underground power house effectively, reduced the configuration of the volume and the permanent pump drainage equipment of collecting well.
Claims (1)
1. the job practices of Fu Shui area underground workshop cavern layering draining is characterized in that this method may further comprise the steps:
1) at first excavate intercept water gallery (1) and the drain hole of drainage gallery that intercepts water (6), this gallery that intercepts water is positioned at the massif that top, underground power house cavern (2) is higher than river water level (9), the gallery gradient that intercepts water aspect river course, and the outlet elevation of the gallery that intercepts water is higher than river water level (9);
2) each layer collector drain (3) reaches drain hole (8) around the underground power house cavern that is communicated with described collector drain around the excavation underground power house cavern, divide the collector drain (3) on several layers excavation top, underground power house cavern (2) and the drain hole (8) that is communicated with collector drain, drain hole (8) should be prior to excavating with elevation underground power house cavern around each layer collector drain (3) reached the underground power house cavern that is communicated with described collector drain around the underground power house cavern;
3) excavation bottom, underground power house cavern (2) is provided with collecting well (7) and pump drainage equipment in its bottom, and collecting well is connected with each layer collector drain (3);
What 4) vertical or oblique top be set between the gallery that intercepts water (1) on upper strata and collecting well (7) outlet is connected gallery (4), connecting the crossover sites of gallery with the gallery that intercepts water, the bottom elevation that connects gallery is higher than and intercepts water gallery or overfall (5) is set on the gallery that intercepts water;
5) after all excavate and finish local factory building cavern (2) down, the underground infiltration that each layer collector drain (3) around the underground power house cavern collected focuses in the collecting well (7) of bottom, underground power house cavern, utilize water pump to be pumped in the gallery that intercepts water (1), flow into Ha Noi more naturally through connecting gallery (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101637562A CN101446107B (en) | 2008-12-31 | 2008-12-31 | Layered drainage structure of underground powerhouse chamber of hydropower station in water-rich region and construction method thereof |
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| CN2008101637562A CN101446107B (en) | 2008-12-31 | 2008-12-31 | Layered drainage structure of underground powerhouse chamber of hydropower station in water-rich region and construction method thereof |
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| CN101446107B true CN101446107B (en) | 2010-11-10 |
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| CN101876182B (en) * | 2010-06-03 | 2012-05-30 | 上海市城市排水有限公司 | Intelligent urban sewage drainage method |
| CN104060632B (en) * | 2014-06-13 | 2015-06-17 | 长江勘测规划设计研究有限责任公司 | Underground migration protective system for radioactive waste water of underground nuclear power station |
| WO2015188697A1 (en) * | 2014-06-13 | 2015-12-17 | 长江勘测规划设计研究有限责任公司 | Radioactive waste water underground migration protection system of underground nuclear power plant |
| CN110284470B (en) * | 2019-06-11 | 2024-10-01 | 中国电建集团北京勘测设计研究院有限公司 | Hydropower station pressure pipeline drainage gallery structure |
| CN110607798B (en) * | 2019-10-10 | 2024-03-22 | 中国电建集团北京勘测设计研究院有限公司 | Underground factory building drainage corridor suitable for TBM construction |
| CN117072364B (en) * | 2023-09-20 | 2024-04-02 | 中铁十四局集团第二工程有限公司 | Tail water treatment system of hydroelectric power station and hydroelectric power generation system |
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