CN109755839A - Rock geology condition large-scale power station Grounding Measure of GSM - Google Patents
Rock geology condition large-scale power station Grounding Measure of GSM Download PDFInfo
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- CN109755839A CN109755839A CN201910199728.4A CN201910199728A CN109755839A CN 109755839 A CN109755839 A CN 109755839A CN 201910199728 A CN201910199728 A CN 201910199728A CN 109755839 A CN109755839 A CN 109755839A
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- grounding
- earthing
- clay
- earthing pole
- friction reducer
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Abstract
The invention discloses a kind of rock geology condition large-scale power station Grounding Measure of GSM, include the following steps: that vertical grounding electrode makes；Machine drilling；Vertical grounding electrode installation；Friction reducer proportion, stirring, perfusion；The compacting of earthing pole clay backfilling；Between earth bus, earth bus with and earthing pole connect；Earthing module connection installation；Weld anti-corrosion；The compacting of earth bus clay backfilling.The present invention uses advanced grounding construction technique, and reasonably selects the product mix for reducing resistance value, obvious to the regional resistance reducing effect of the drops resistance constructional difficulties such as mountain area, high soil rate area and dry area in north china；The installation of Grounding Grids, need to only be inserted into the earthing pole made, perfusion physics friction reducer in hole after machine drilling, construction method is easy；The construction method that physics friction reducer is combined with earthing module replaces the Grounding Grids that difficulty of construction is big by horizontal grounding objects, effectively reduces construction workload, saves material, reduction is polluted, business efficiency is obvious.
Description
Technical field
The invention belongs to power station grounded screen technical field of construction, and in particular, to a kind of rock geology condition large-scale power station
Grounding Measure of GSM.
Background technique
Grounded screen is as power station, wind power generating set, substation's alternating current-direct current equipment ground and thunder proof protection ground, to guarantee
The safe and stable operation of system plays an important role.With economy, energy-saving and emission-reduction, environmentally protective energy construction theory hair
Exhibition, large-scale power station, wind power generating set construction addressing on be typically chosen the bordering on the sea of nuisanceless pollution, mountain area and Gobi desert, but
The rock geology structure of its underground is created great difficulties to the construction of power station, wind power generating set, grounding net of transformer substation, and early stage transports
It has answered blasting technique to break stone to banket, digs and be grounded well the technological means such as backfill install concentration earthing pole again, though it can reach drop
The effect of low resistance meets the requirement of design resistance value, but expends a large amount of human and material resources, financial resources, and neither science is also uneconomical.
Summary of the invention
The purpose of the present invention is to provide a kind of rock geology condition large-scale power station Grounding Measure of GSM, by vertically connecing
Body installation in ground uses machine drilling, and the friction reducer being stirred is filled into around earthing pole after installation, after friction reducer solidification, uses
Around wet clay covering earthing pole；Between earth bus, earth bus and earthing module, earth bus and vertical grounding electrode adopt
It is attached with welding manner, can excavate fine earth by adding friction reducer around earthing module using original and carry out backfill covering, have
Effect reduces resistance value.
The purpose of the present invention can be achieved through the following technical solutions:
Rock geology condition large-scale power station Grounding Measure of GSM, includes the following steps:
Step 1: vertical grounding electrode makes
1) vertical grounding electrode makes of DN50 hot galvanized steel pipe, length 2500mm, and red be processed into is simmered at the 120mm of bottom
Pointed shape；
2) it is connect earthing pole pipe collar with ground line right angle, intercepts -60 × 8 band steel one of 220mm, bends molding；
Step 2: machine drilling
1) it is backfilled according to Construction Schedule and starts earthing or grounding means construction when graded broken stone tamps zero meter or less 800mm, pressed
As requested positions earthing pole, with aperture 120mm augers in earthing pole center by boring the vertical of a diameter 120mm
Hole；
2) run of steel is measured, exits when drilling rod is drilled at depth 2500mm, slowly to be carried out when drill bit exits；
3) after the completion of machine drill hole hole to be drilled, drilling depth, size are measured；
Step 3: vertical grounding electrode is installed
1) clay is inserted in vertical hole bottom, pours into water, filling clay is tamped in 145-155mm；
2) earthing pole made is inserted perpendicularly into the center in hole, insertion depth is in 2250-2350mm；
Step 4: friction reducer proportion, stirring, perfusion:
1) it predicts that friction reducer amount is perfused in each Kong Zhongxu, and friction reducer and water 2:1 in mass ratio is weighed, put respectively
In two clean plastic barrels；
2) in another metal bucket, on one side plus friction reducer while add water, be ceaselessly stirred with blender, until stirring
At starchiness；
3) it slowly to be carried out when friction reducer is perfused, and be inserted into a reinforcing bar in hole and vibrate, grasped and connect when vibrating
Earth polar makes earthing pole always in vertical hole center, and earthing pole upper end ear direction should be consistent with earth bus direction；
Step 5: earthing pole clay backfilling is tamped
1) after friction reducer solidification, start the backfill clay around earthing pole and covered；
2) clay backfilled will sprinkle water when more dry moistens compacting；
Step 6: between earth bus, earth bus with and earthing pole connect
1) it uses -60 × 8 zinc-coated flat steel sheets as main grounding grid bus, bus is raised into 100mm, is fixed temporarily, is then welded,
Welding should use overlap welding；
2) earthing pole is connect with earth bus: -60 × 8 galvanizing grounding flat steels are connect using welding with vertical grounding electrode,
When guaranteeing length, the welding of three sides；
Step 7: earthing module connection installation
The mounting means of earthing module is determined according to site operation place geological condition, difficulty of construction；
1) horizontal embedding earthing module is connected when being excavated to and requiring depth with earth bus；
2) vertical embedding earthing module is connected when being excavated to and requiring depth with earth bus；Earthing module week
It encloses addition friction reducer and reaches the low-resistance purpose of drop；
Step 8: weld anti-corrosion
1) weld removes coating, and removing surface is clean, brush bituminous epoxy paint anti-corrosion；
2) weld of grounding body does anti-corrosion or antirust treatment, and when hot galvanizing welded steel should do in 100mm outside welding trace
Preservative treatment；
Step 9: earth bus clay backfilling is tamped
1) earth bus, clay width 300mm, high 400mm are wrapped up with clay；
2) tamped when every covering 200mm it is primary, until earth bus surrounded completely by clay it is closely knit；
3) clay it is more dry add water-wet moisten after ram again it is closely knit.
Further, the lap of splice described in step 6 should be 2 times of bus width.
Further, when several wired in parallel are embedding in step 7, intermodule is not away from 4.0m is preferably less than, as condition does not permit
Perhaps, can suitably reduce, when the pole piece of earthing module is mutually in parallel, welding is using electrical welding or ERI CO exothermic weld.
Beneficial effects of the present invention:
(1) present invention uses advanced grounding construction technique, and reasonably selects the product mix for reducing resistance value, to mountain
The regional resistance reducing effect of the drops resistance constructional difficulties such as area, high soil rate area and dry area in north china is obvious；
(2) present invention in Grounding Grids installation, after machine drilling only need to be inserted into hole the earthing pole made, fill
Physics friction reducer is infused, construction method is easy；
(3) construction method that the present invention is combined using physics friction reducer with earthing module, is replaced by horizontal grounding objects
The Grounding Grids that difficulty of construction is big, effectively reduce construction workload, saving material more beautiful compared to conventional method technique,
Reduction pollution, business efficiency are obvious；
(4) vertical grounding electrode of the invention, earthing module and earth bus excavate fine earth using original and carry out backfill covering,
Resistance value is effectively reduced.
Detailed description of the invention
In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the drawings.
Fig. 1 is working procedure flow chart；
Fig. 2 is the structural schematic diagram of the first earthing pole pipe collar；
Fig. 3 is the structural schematic diagram of the first earthing pole pipe collar；
Fig. 4 is ground line and earth bus right angle connection schematic diagram；
Fig. 5 is to be grounded connection schematic diagram parallel with earth bus.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff all other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
Rock geology condition large-scale power station Grounding Measure of GSM, as shown in Figure 1, including the following steps:
Step 1: vertical grounding electrode makes
1) vertical grounding electrode makes of DN50 hot galvanized steel pipe, length 2500mm, and red be processed into is simmered at the 120mm of bottom
Pointed shape；
2) it is connect earthing pole pipe collar with ground line right angle, -60 × 8 band steel one of 220mm is intercepted, according to such as Fig. 2 and Fig. 3
It is shown to bend molding, as shown in Fig. 2, the first earthing pole pipe collar includes that intermediate semicircle segmental arc 11 and 11 both ends of semicircle segmental arc connect
The vertical section 12 connect, 12 other end of vertical section connect horizontal segment 13, and the radius of semicircle segmental arc 11 is 30mm, the height of vertical section 12
For 30mm, the length of horizontal segment 13 is 50mm；As shown in figure 3, the second earthing pole pipe collar include segmental arc 21 and with segmental arc 21
The straight section 22 that both ends are connected, the radius of segmental arc 21 are 30mm, and the length of straight section 22 is 60mm, straight section 22 and segmental arc 21
Axis angulation is 45 °；
Step 2: machine drilling
1) it is backfilled according to Construction Schedule and starts earthing or grounding means construction when graded broken stone tamps zero meter or less 800mm, pressed
Earthing pole is positioned according to ground grid design drawing requirement, with aperture 120mm augers in earthing pole center by professional people
The vertical hole of a diameter 120mm is bored in member's operation；
2) run of steel is measured, can exit, slowly to be carried out when drill bit exits, too when drilling rod is drilled at depth 2500mm
Easily rubble band is fallen into hole fastly and is blocked；
3) after the completion of machine drill hole hole to be drilled, drilling depth, size are measured；
Step 3: vertical grounding electrode is installed
1) a certain amount of clay is inserted in vertical hole bottom, pours into water, filling clay is tamped in 145-155mm；
2) earthing pole made is inserted perpendicularly into the center in hole, insertion depth is in 2250-2350mm；
Step 4: friction reducer proportion, stirring, perfusion:
1) predict that friction reducer amount is perfused in each Kong Zhongxu, every bag of physics friction reducer is in 12kg, and every hole needs 45kg, and 4 bags i.e.
Can, it is temporarily unused to make sure to keep in mind not open the package, friction reducer and water 2:1 in mass ratio are weighed respectively first, two is individually placed to and does
In net plastic barrel；
2) in another metal bucket, on one side plus friction reducer while add water, be ceaselessly stirred with blender, until stirring
It can be perfused at starchiness；
3) it slowly to be carried out when friction reducer is perfused, and be inserted into a reinforcing bar in hole and vibrate, grasped and connect when vibrating
Earth polar makes earthing pole always in vertical hole center, and earthing pole upper end ear direction should be consistent with earth bus direction,
Convenient for welding；
Step 5: earthing pole clay backfilling is tamped
1) after friction reducer solidification, start the backfill clay around earthing pole and covered；
2) clay backfilled will sprinkle water when more dry moistens compacting；
Step 6: between earth bus, earth bus with and earthing pole connect
1) it uses -60 × 8 zinc-coated flat steel sheets as main grounding grid bus, bus is raised into 100mm, is fixed temporarily, is then welded.
Welding should use overlap welding, and the lap of splice should be 2 times of its width；
2) earthing pole is connect with earth bus: -60 × 8 galvanizing grounding flat steels are connect with vertical grounding electrode should be using weldering
It connects, when guaranteeing length, as shown in Figure 4,5, the welding of at least three sides；As shown in figure 4,3- steel pipe earthing pole, 2- second is connect
Earth polar pipe collar, the first -60 × 8 galvanizing grounding flat steel of 4-；As shown in figure 5,3- steel pipe earthing pole, 1- the second earthing pole pipe collar,
The second -60 × 8 galvanizing grounding flat steel of 5-；
Step 7: earthing module connection installation
The mounting means of earthing module is determined according to site operation place geological condition, difficulty of construction；
1) horizontal embedding earthing module is connected when being excavated to and requiring depth with earth bus；
2) vertical embedding earthing module is connected when being excavated to and requiring depth with earth bus；Earthing module week
Friction reducer can be added by, which enclosing, reaches the low-resistance purpose of drop；
When several wired in parallel are embedding, intermodule can suitably reduce, connect if condition does not allow away from not preferably less than 4.0m
When the pole piece of ground module is mutually in parallel, welding is using electrical welding or ERI CO exothermic weld；
Step 8: weld anti-corrosion
1) weld should remove coating, and removing surface is clean, brush bituminous epoxy paint anti-corrosion；
2) weld of grounding body (line) should do anti-corrosion or antirust treatment, and when hot galvanizing welded steel should be outside welding trace
Preservative treatment is done in 100mm；
Step 9: earth bus clay backfilling is tamped
1) earth bus, clay width about 300mm, high about 400mm are wrapped up with clay；
2) tamped when every covering 200mm it is primary, until earth bus surrounded completely by clay it is closely knit；
3) clay it is more dry add water-wet moisten after ram again it is closely knit.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (3)
1. rock geology condition large-scale power station Grounding Measure of GSM, which comprises the steps of:
Step 1: vertical grounding electrode makes
1) vertical grounding electrode with DN50 hot galvanized steel pipe make, length 2500mm, the 120mm of bottom at stewing it is red be processed into it is pointed
Shape；
2) it is connect earthing pole pipe collar with ground line right angle, intercepts -60 × 8 band steel one of 220mm, bends molding；
Step 2: machine drilling
1) it is backfilled according to Construction Schedule and starts earthing or grounding means when graded broken stone tamps zero meter of following 800mm and construct, according to wanting
It asks and positions earthing pole, with aperture 120mm augers in earthing pole center by the vertical hole of one diameter 120mm of brill；
2) run of steel is measured, exits when drilling rod is drilled at depth 2500mm, slowly to be carried out when drill bit exits；
3) after the completion of machine drill hole hole to be drilled, drilling depth, size are measured；
Step 3: vertical grounding electrode is installed
1) clay is inserted in vertical hole bottom, pours into water, filling clay is tamped in 145-155mm；
2) earthing pole made is inserted perpendicularly into the center in hole, insertion depth is in 2250-2350mm；
Step 4: friction reducer proportion, stirring, perfusion:
1) it predicts that friction reducer amount is perfused in each Kong Zhongxu, and friction reducer and water 2:1 in mass ratio is weighed, be individually placed to two
Only in clean plastic barrel；
2) in another metal bucket, on one side plus friction reducer while add water, be ceaselessly stirred with blender, until stirring is slurried
Paste；
3) it slowly to be carried out when friction reducer is perfused, and be inserted into a reinforcing bar in hole and vibrate, earthing pole is grasped when vibrating,
Make earthing pole always in vertical hole center, earthing pole upper end ear direction should be consistent with earth bus direction；
Step 5: earthing pole clay backfilling is tamped
1) after friction reducer solidification, start the backfill clay around earthing pole and covered；
2) clay backfilled will sprinkle water when more dry moistens compacting；
Step 6: between earth bus, earth bus with and earthing pole connect
1) it uses -60 × 8 zinc-coated flat steel sheets as main grounding grid bus, bus is raised into 100mm, is fixed temporarily, is then welded, weld
Overlap welding should be used；
2) earthing pole is connect with earth bus: -60 × 8 galvanizing grounding flat steels are connect using welding with vertical grounding electrode, are being protected
In the case of demonstrate,proving length, the welding of three sides；
Step 7: earthing module connection installation
The mounting means of earthing module is determined according to site operation place geological condition, difficulty of construction；
1) horizontal embedding earthing module is connected when being excavated to and requiring depth with earth bus；
2) vertical embedding earthing module is connected when being excavated to and requiring depth with earth bus；Add around earthing module
Friction reducer is added to reach the low-resistance purpose of drop；
Step 8: weld anti-corrosion
1) weld removes coating, and removing surface is clean, brush bituminous epoxy paint anti-corrosion；
2) weld of grounding body does anti-corrosion or antirust treatment, and when hot galvanizing welded steel should do anti-corrosion outside welding trace in 100mm
Processing；
Step 9: earth bus clay backfilling is tamped
1) earth bus, clay width 300mm, high 400mm are wrapped up with clay；
2) tamped when every covering 200mm it is primary, until earth bus surrounded completely by clay it is closely knit；
3) clay it is more dry add water-wet moisten after ram again it is closely knit.
2. rock geology condition large-scale power station Grounding Measure of GSM according to claim 1, which is characterized in that step 6
Described in the lap of splice be 2 times of bus width.
3. rock geology condition large-scale power station Grounding Measure of GSM according to claim 1, which is characterized in that step 7
In several wired in parallel it is embedding when, intermodule can suitably reduce if condition does not allow away from not being preferably less than 4.0m, earthing module
When pole piece is mutually in parallel, welding is using electrical welding or ERICO exothermic weld.
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| CN201910199728.4A CN109755839A (en) | 2019-03-15 | 2019-03-15 | Rock geology condition large-scale power station Grounding Measure of GSM |
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| CN201910199728.4A CN109755839A (en) | 2019-03-15 | 2019-03-15 | Rock geology condition large-scale power station Grounding Measure of GSM |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350128A (en) * | 2020-09-28 | 2021-02-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Manufacturing method of grounding device of open-air limestone mine power supply system |
| CN113047773A (en) * | 2021-03-15 | 2021-06-29 | 贵州电网有限责任公司 | Method for mounting vertical deep drilling buried grounding body |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466595A (en) * | 2014-12-23 | 2015-03-25 | 国网浙江诸暨市供电公司 | Graphite type grounding resistance reduction module burying method |
| CN108511930A (en) * | 2018-04-04 | 2018-09-07 | 山西省工业设备安装集团有限公司 | A kind of mud stone class geology grounded screen construction technology |
-
2019
- 2019-03-15 CN CN201910199728.4A patent/CN109755839A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466595A (en) * | 2014-12-23 | 2015-03-25 | 国网浙江诸暨市供电公司 | Graphite type grounding resistance reduction module burying method |
| CN108511930A (en) * | 2018-04-04 | 2018-09-07 | 山西省工业设备安装集团有限公司 | A kind of mud stone class geology grounded screen construction technology |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350128A (en) * | 2020-09-28 | 2021-02-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Manufacturing method of grounding device of open-air limestone mine power supply system |
| CN113047773A (en) * | 2021-03-15 | 2021-06-29 | 贵州电网有限责任公司 | Method for mounting vertical deep drilling buried grounding body |
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Application publication date: 20190514 |