CN105178266A - Method for preventing stone in tunnel from entering water turbine in high-burial-depth, high-ground-temperature and high-ground-stress rockburst area - Google Patents
Method for preventing stone in tunnel from entering water turbine in high-burial-depth, high-ground-temperature and high-ground-stress rockburst area Download PDFInfo
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- CN105178266A CN105178266A CN201510354805.0A CN201510354805A CN105178266A CN 105178266 A CN105178266 A CN 105178266A CN 201510354805 A CN201510354805 A CN 201510354805A CN 105178266 A CN105178266 A CN 105178266A
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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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Abstract
The invention discloses a method for preventing stone in a tunnel from entering a water turbine in a high-burial-depth, high-ground-temperature and high-ground-stress rockburst area. Monitoring instruments are arranged in a stone collecting pit of the power generating and water guiding tunnel, the filling degree of the stone collecting pit is judged by monitoring the readings of the arranged monitoring instruments, and accordingly whether stone removing work needs to be carried out or not is determined. The purpose that the full-load degree of the stone collecting pit in the power generating and water guiding tunnel is effectively judged is achieved, running safety of power generating equipment of a hydropower station is ensured, and power generating benefits are not wasted.
Description
Technical field
The present invention relates to a kind of method preventing stone from entering the hydraulic turbine, especially a kind of high buried depth, High-geotemperature, high stress rock burst area prevents stone in tunnel from entering the method for the hydraulic turbine.
Background technology
In intake tunnel design, for making full use of the self-stable ability of country rock, supporting capacity and impermeability, reduce investment, according to " hydraulic tunnel design specifications ": the appropriate to the occasion employing shotcrete support of II class surrounding rock, tunnel diameter 6 ~ 10m; III class surrounding rock can adopt the combined supportings such as spray anchor linked network.But for the hydropower tunnel in high buried depth, high-ground stress, High-geotemperature rock burst area, country rock adopts combined bolting and shotcrete or naked hole mode, following several situation may be there is: first, in the situation of naked hole, because high-ground stress causes rock burst to occur, make hole wall rock peel off, fall block, affect the safe operation of engineering; Secondly, in the situation of naked hole, due to country rock High-geotemperature, under not lining cutting condition, water crossed by tunnel, water temperature is lower, country rock can produce larger tensile stress under the effect of temperature load, make originally to occur rock mass that rock burst reaches stable state through stresses re-distribution again unstability, peel off, affect the safe operation of engineering; Finally, in combined bolting and shotcrete situation, due to High-geotemperature, shotcrete effect is bad, and adhesive strength is inadequate, and combined bolting and shotcrete peels off, and country rock is exposed, affects the safe operation of engineering.When tunnel water velocity 4m/s; block footpath is not more than the stone of 35cm or concrete block all can be taken away by current; if these rock blocks enter hydrogenerator the most at last; then the damage of generator blade and miscellaneous part will be caused; even cause shutting down, scrapping; not only maintenance cost is large, and affects supply of electric power.At present, the method solving this problem is that position suitable in diversion tunnel arranges collection stone pit, rock block is assembled in hole, avoids it to enter the hydraulic turbine.But the method Problems existing is the time can not determining to clear up collection stone pit scientifically and rationally, if the frequency of cleaning work is too high, then can causes the frequent unnecessary shutdown of generating system by piloting water, reduce and send out benefit; If the underfrequency of cleaning work, then collection stone pit likely occurs and fills up already, stone enters the situation of the hydraulic turbine.Therefore, a kind of stone that can prevent cost-effectively is needed to enter the method for the hydraulic turbine.
Summary of the invention
Technical problem to be solved by this invention is, there is provided a kind of by arranging monitoring instrument in the collection stone pit of intake tunnel, guarantee the safe operation of hydropower station system, and do not waste the high buried depth of power benefit, High-geotemperature, high stress rock burst area prevent stone in tunnel from entering the method for the hydraulic turbine.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of high buried depth, High-geotemperature, high stress rock burst area prevents stone in tunnel from entering the method for the hydraulic turbine, by arranging monitoring instrument in the collection stone pit of intake tunnel, by monitoring arrange monitoring instrument reading judge collect stone pit fill up degree, determine whether carry out block stone removing work.
Specifically, comprise the following steps:
(1) demarcate monitoring instrument: monitoring instrument comprise the uncovered of anti-corrosion metal cabinet, be fixed on some earth pressure gauges bottom metal cabinet, be positioned at the outside readout instrument be connected with earth pressure gauge by data cable, demarcate in metal cabinet load in various degree block stone time, the reading situation of record earth pressure gauge;
(2) monitoring instrument be positioned in collection stone pit, readout instrument is arranged in Control Room, and what judge stone in collection stone pit by the reading of earth pressure gauge fills up degree, determines whether carry out collection stone pit removing work.
In described step (1), the scaling method carrying out metal cabinet loading degree comprises: first by in-built for casing full water, record the number of degrees of each earth pressure gauge, average and be designated as I
0; Then in case, place stone, reach the loading degree of 50%, record the number of degrees of each earth pressure gauge, average and be designated as I
50; Finally casing is filled stone, and record the number of degrees of each earth pressure gauge, average and be designated as I
100.
In described step (2), in the operation phase of generating system by piloting water, if the average of the earth pressure gauge number of degrees reaches I
100, illustrate that collection stone pit is filled, need to close access door, staff enters tunnel, is removed by the block stone in hole.
The invention has the beneficial effects as follows: the safe handling that can ensure generating equipment, and, avoid maintenance down work too frequently, improve safety and the economic benefit in power station simultaneously.
Accompanying drawing explanation
Fig. 1 is monitoring instrument schematic bottom view of the present invention.
Fig. 2 is monitoring instrument structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
A kind of high buried depth, High-geotemperature, high stress rock burst area prevents stone in tunnel from entering the method for the hydraulic turbine, by arranging monitoring instrument in the collection stone pit of intake tunnel, by monitoring arrange monitoring instrument reading judge collect stone pit fill up degree, determine whether carry out block stone removing work.
Specifically, comprise the following steps:
(1) demarcate monitoring instrument: monitoring instrument comprise the uncovered of anti-corrosion metal cabinet, be fixed on some earth pressure gauges bottom metal cabinet, be positioned at the outside readout instrument be connected with earth pressure gauge by data cable, demarcate in metal cabinet load in various degree block stone time, the reading situation of record earth pressure gauge;
(2) monitoring instrument be positioned in collection stone pit, readout instrument is arranged in Control Room, and what judge stone in collection stone pit by the reading of earth pressure gauge fills up degree, determines whether carry out collection stone pit removing work.
In described step (1), the scaling method carrying out metal cabinet loading degree comprises: first by in-built for casing full water, record the number of degrees of each earth pressure gauge, average and be designated as I
0; Then in case, place stone, reach the loading degree of 50%, record the number of degrees of each earth pressure gauge, average and be designated as I
50; Finally casing is filled stone, and record the number of degrees of each earth pressure gauge, average and be designated as I
100.
In described step (2), in the operation phase of generating system by piloting water, if the average of the earth pressure gauge number of degrees reaches I
100, illustrate that collection stone pit is filled, need to close access door, staff enters tunnel, is removed by the block stone in hole.
Detailed description of the invention below in conjunction with some hydropower station engineering is described in further detail the present invention:
As shown in Figure 1, 2, monitoring instrument comprises steel casing 1, earth pressure gauge 2, pre-embedded steel slab 3, reserved bolt 4, prepared screw-bolt hole 5, pre-load nut 6, readout instrument 7, data cable 8, structural strengthening i iron 9 and hole base concrete 10.
First, steel plate and structural strengthening i iron 9 is utilized to weld steel casing 1, prepared screw-bolt hole 5 is set at bottom half, and arranges totally 9 earth pressure gauges 2 (needing strict guarantee 9 earth pressure gauges in same level) at uniform 3 row 3 of steel casing 1 bottom surface installing space.
Carry out the demarcation that steel casing 1 loads degree: first by in-built for casing full water, record the reading of each earth pressure gauge, the 25kPa that averages is designated as I
0; Then in case, place stone, reach the loading degree of 50%, record the reading of each earth pressure gauge, the 50kPa that averages is designated as I
50; Finally casing is filled stone, and record the number of degrees of each earth pressure gauge, the 70kPa that averages is designated as I
100.
Pre-embedded steel slab 3 (note ensureing steel plate 3 strict horizontally embedded) in the base concrete 10 of collection stone pit hole, the reserved bolt 4 of welding thereon; Then, steel casing 1 is placed on the base concrete 10 of hole, needs to ensure earth pressure gauge 2 and pre-embedded steel slab 3 one_to_one corresponding, and make reserved bolt 4 through prepared screw-bolt hole 5; Data cable 8 is caused readout instrument 7; Finally, pre-load nut 6 is tightened on reserved bolt 4.
When earth pressure gauge reading average reaches I
50(50kPa) time, need to draw attention, strengthen the monitoring frequency to this project, when earth pressure gauge reading average is close to I
100(70kPa) time, generating set should be stopped immediately, close tunnel for overhaul door, carry out removing work.
The above example is only for illustration of technological thought of the present invention and feature, its object is to those skilled in the art can understand content of the present invention and implement according to this, only can not limit the scope of the claims of the present invention with this example, namely the equal change done of all disclosed spirit or modification, still fall within the scope of the invention.
Claims (4)
1. a high buried depth, High-geotemperature, high stress rock burst area prevent stone in tunnel from entering the method for the hydraulic turbine, it is characterized in that, by arranging monitoring instrument in the collection stone pit of intake tunnel, by monitoring arrange monitoring instrument reading judge collect stone pit fill up degree, determine whether carry out block stone removing work.
2. high buried depth according to claim 1, High-geotemperature, high stress rock burst area prevent stone in tunnel from entering the method for the hydraulic turbine, it is characterized in that, comprise the following steps:
(1) demarcate monitoring instrument: monitoring instrument comprise the uncovered of anti-corrosion metal cabinet, be fixed on some earth pressure gauges bottom metal cabinet, be positioned at the outside readout instrument be connected with earth pressure gauge by data cable, demarcate in metal cabinet load in various degree block stone time, the reading situation of record earth pressure gauge;
(2) monitoring instrument be positioned in collection stone pit, readout instrument is arranged in Control Room, and what judge stone in collection stone pit by the reading of earth pressure gauge fills up degree, determines whether carry out collection stone pit removing work.
3. high buried depth according to claim 2, High-geotemperature, high stress rock burst area prevent stone in tunnel from entering the method for the hydraulic turbine, it is characterized in that, in described step (1), the scaling method carrying out metal cabinet loading degree comprises: first by in-built for casing full water, record the number of degrees of each earth pressure gauge, average and be designated as I
0; Then in case, place stone, reach the loading degree of 50%, record the number of degrees of each earth pressure gauge, average and be designated as I
50; Finally casing is filled stone, and record the number of degrees of each earth pressure gauge, average and be designated as I
100.
4. high buried depth according to claim 3, High-geotemperature, high stress rock burst area prevent stone in tunnel from entering the method for the hydraulic turbine, it is characterized in that, in described step (2), in the operation phase of generating system by piloting water, if the average of the earth pressure gauge number of degrees reaches I
100, illustrate that collection stone pit is filled, need to close access door, staff enters tunnel, is removed by the block stone in hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510354805.0A CN105178266B (en) | 2015-06-24 | 2015-06-24 | Method for preventing stone in tunnel from entering water turbine in high-burial-depth, high-ground-temperature and high-ground-stress rockburst area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510354805.0A CN105178266B (en) | 2015-06-24 | 2015-06-24 | Method for preventing stone in tunnel from entering water turbine in high-burial-depth, high-ground-temperature and high-ground-stress rockburst area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105178266A true CN105178266A (en) | 2015-12-23 |
| CN105178266B CN105178266B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510354805.0A Active CN105178266B (en) | 2015-06-24 | 2015-06-24 | Method for preventing stone in tunnel from entering water turbine in high-burial-depth, high-ground-temperature and high-ground-stress rockburst area |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU642422A1 (en) * | 1977-08-10 | 1979-01-15 | Сибирский Филиал Всесоюзного Ордена Трудового Красного Знамени Научно-Исследовательского Института Гидротехники Имени Б.Е.Веденеева | Water intake head |
| CN201429430Y (en) * | 2009-07-02 | 2010-03-24 | 中国水电顾问集团华东勘测设计研究院 | Collected stone observation box used in upstream sloping stone collecting pit |
| CN201473935U (en) * | 2009-08-19 | 2010-05-19 | 中国水电顾问集团华东勘测设计研究院 | Diversion tunnel stone-pit structure |
| CN201788003U (en) * | 2010-09-15 | 2011-04-06 | 中国水电顾问集团华东勘测设计研究院 | Wagon balance for monitoring ballast accumulation quantity in ballast accumulation pit |
-
2015
- 2015-06-24 CN CN201510354805.0A patent/CN105178266B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU642422A1 (en) * | 1977-08-10 | 1979-01-15 | Сибирский Филиал Всесоюзного Ордена Трудового Красного Знамени Научно-Исследовательского Института Гидротехники Имени Б.Е.Веденеева | Water intake head |
| CN201429430Y (en) * | 2009-07-02 | 2010-03-24 | 中国水电顾问集团华东勘测设计研究院 | Collected stone observation box used in upstream sloping stone collecting pit |
| CN201473935U (en) * | 2009-08-19 | 2010-05-19 | 中国水电顾问集团华东勘测设计研究院 | Diversion tunnel stone-pit structure |
| CN201788003U (en) * | 2010-09-15 | 2011-04-06 | 中国水电顾问集团华东勘测设计研究院 | Wagon balance for monitoring ballast accumulation quantity in ballast accumulation pit |
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| CN105178266B (en) | 2017-02-01 |
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