CN106285732A - The through excavation construction method in a kind of underground chamber big duck eye footpath - Google Patents
The through excavation construction method in a kind of underground chamber big duck eye footpath Download PDFInfo
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- CN106285732A CN106285732A CN201610752992.2A CN201610752992A CN106285732A CN 106285732 A CN106285732 A CN 106285732A CN 201610752992 A CN201610752992 A CN 201610752992A CN 106285732 A CN106285732 A CN 106285732A
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- Prior art keywords
- cavern
- excavation
- footpath
- hole
- big
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D13/00—Large underground chambers; Methods or apparatus for making them
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
Abstract
The present invention relates to the through excavation construction method in a kind of underground chamber big duck eye footpath, belong to Construction Technology field.The present invention solves the duck eye footpath through Forming Quality of cavern excavation, pass through optimum blast design, use and do not couple short-delay blasting mode, controlled loading of explosive amount, duck eye footpath cavern advanced excavation runs through big cavern, and big cavern reserves cover layer, afterwards radiation bright finish blast hole, in the middle of using, kerve, the form of explosion to be split are carried out controlled blasting and are vibrated and disturbance, thus reach big small cavities through excavation molding effect.Technical solution of the present invention is reasonable, and explosion design safety is practical, and cavern's opening Forming Quality is good, can effectively control out break and rock blasting loosens, the features such as construction technology quality is guaranteed, it is adaptable to the through Excavation blasting of the big small cavities of underground chamber controls construction.
Description
Technical field
The invention belongs to Construction Technology field, be specifically related to a kind of through excavation construction side, underground chamber big duck eye footpath
Method, it is adaptable to Underground Engineering Blasting excavation construction.
Background technology
Along with the development of human society, underground engineering will be increasingly used in each neck of national economy capital construction
Territory, in the engineering constructions such as water conservancy and hydropower, highway, railway, oil depot, has been increasingly employed underground chamber.
Before the sixties in 20th century, Underground Engineering Excavation is with hands air drill pore-creating, free explosion；The initial stage eighties, at Xi Er
Power station, river, fishing Zi Xi power station, Baishan Hydroelectric Power Station construction in, have employed photoface exploision；After 1985, draw in infectious coryza lattice power station
In water tunnel excavation, use drill jumbo, non-electric ms detonator, full*.face smooth blasting, create average drill footage per month 231m, Gao Yue
The record of drilling depth 373.5m.In succession promote in the tunnel excavation of the engineerings such as Man Wan power station, Guangzhou Pump-Storaged Plant, obtain
Preferable achievement, makes China's underground engineering construction reach a new level.
Along with drilling machine, explosive and drill bursting technology, and the development of " New Austrian Tunneling Method " construction technology, bolt-spary supports is made
For the long lining cutting of water, Underground powerhouse excavation uses heading blast, Rock Crane Rail Support foundation excavation, photoface exploision, presplit blasting, buffering
Blasting technique is widely used in underground engineering.
The through excavation construction method in tradition underground chamber big duck eye footpath is Xian Kai great Dong footpath cavern, the most again towards hole, duck eye footpath
Room is excavated, this makes it difficult to controlled blasting vibration and Lycopodium chinense Christ moving-coil, cavern's opening Forming Quality of formation is poor.At Underground Tunnels
During fine explosion key technology research is excavated in room, for guaranteeing underground chamber opening Forming Quality, how to improve excavation light quick-fried
Effect, effective controlled blasting vibration and Lycopodium chinense Christ moving-coil, reasonably control out break to become key issue.
Summary of the invention
Deficiency during it is an object of the invention to based on the fine blast working of underground powerhouse, for guaranteeing big duck eye
Footpath cavern through Excavation blasting Forming Quality, it is provided that the through excavation construction method in a kind of underground chamber big duck eye footpath, this construction party
Method improves drill-blast tunnelling Forming Quality, and the footpath molding of charge explosion hole meets design requirement, controls to have reached expection to out break
Effect.
For achieving the above object, the technical solution used in the present invention is as follows:
The through excavation construction method in a kind of underground chamber big duck eye footpath, step is as follows: duck eye footpath cavern advanced excavation is through to greatly
Dong Jing cavern, when backbreaking to great Dong footpath cavern, needs reserved cover layer, then edge in the cavern of great Dong footpath in the cavern of great Dong footpath
Cavern moves towards kerve in the middle of direction, and middle kerve is connected with the part of backbreaking of duck eye footpath cavern；Cover reserved afterwards
Explosion to be split is carried out at cap rock, during explosion to be split, first radiation bright finish blast hole, then use and do not couple short-delay blasting mode and carry out
Explosion, finally to great Dong footpath cavern stage excavation.
It is further preferred that concrete blasting construction method is as follows:
Step (1), wind, water, electricity are ready, and workmen, facility prepare in place；
Step (2), measures and controls: Traverse Network and construction survey, professional implement；Every artillery salvo is according to explosion design ginseng
Several somes cloth holes；Excavated section inspection is carried out before spray concrete, checks spacing 5m；3-5d laggard row conductor point checks and repetition measurement, with really
Protect and measure control accuracy；
Step (3), every artillery salvo is checked by the requirement of " flat, straight, neat " by technician on duty, accomplishes to fall quick-fried at the bottom of the hole in big gun hole
On the same vertical section of broken regulation；Meanwhile, the borehole accuracy in strict controlled blasting hole；
Step (4), sweeps boring with high-pressure blast punching before powder charge, after big gun hole is the most qualified, can carry out charge explosion；The dress in big gun hole
The on line of medicine, blocking and blasting circuit should be by through examining big gun work that is qualified and that hold dynamiter's operation quality certification strictly by approval
Hole blasting design applies, and strictly observes shotfiring safety rule of operation；
Utilizing drilling platform powder charge, blast hole powder charge is closely knit, and blocking is good, carries out powder charge in strict accordance with explosion design drawing,
Connect initiation net with on-electric detonator, finally checked inspection by big gun work and technician on duty, confirm errorless, evacuating people and setting
Standby, big gun work is responsible for ignition；
Step (5), starts ventilation installation to end of slagging tap after Excavation blasting always and ventilates, it is ensured that by harmful gas in 2h after explosion
Bulk concentration drops in allowed band, to meet " water power construction of hydro project safety protection facility technical specification " (DL5162-
2013) and the requirement of " hydraulic structure underground excavation project construction technique normalizing " (DL/T5099-2011)；
Step (6), the danger stone of removing residual and fragment, to ensure personnel and the safety of equipment, carry out safety inspection again after slagging tap
And process, check whether that also danger stone exists；In work progress, need to observe constantly the abutment wall adjoining rock stability feelings of excavation section
Condition, clear sled may slump, loosening sillar；
Step (7), slags tap and the clear end: use 3m3Loader or 1.2m3Backhoe dress 20t dump truck is slagged tap；Use after slagging tap
Backhoe clears out work surface accumulated slag, bores quick-fried operation for subsequent cycle ready；
Step (8), surrounding rock supporting: excavate out one section of supporting one section, form multiple operation parallel construction.
It is further preferred that step (2), during cloth hole, use YT28 hands air drill pore-creating.
It is further preferred that step (3), the borehole accuracy in strict controlled blasting hole, control hole is ± 2 ° to deviation, hole
Position deviation ± 1cm.
It is further preferred that step (6) removes the danger stone remained and fragment can be with backhoe or artificial.
Charge explosion of the present invention all uses the method for delaying blasting to construct.
During explosion of the present invention, middle kerve, the form of abutment wall photoface exploision to be split is used to carry out controlled blasting and vibrate and disturbance.
Compared with prior art, it has the beneficial effect that the present invention
The present invention solves the duck eye footpath through Forming Quality of cavern excavation, by optimum blast design, it is quick-fried that employing does not couple elementary errors
Broken mode, controlled loading of explosive amount, duck eye footpath cavern advanced excavation runs through big cavern, and big cavern reserves cover layer, abutment wall radiation bright finish
Blast hole, uses middle kerve, and the form of abutment wall explosion to be split is carried out controlled blasting and vibrated and disturbance, thus reaches big small cavities and pass through
Open up and dig molding effect.
Construction method blast working Forming Quality of the present invention is good, effectively controls out break, and construction safety is secure.It is applicable to
The Construction Technology field underground chamber through excavation construction of big duck eye.Compared with traditional excavation construction method, Mei Yipai
Big gun circulation can shift to an earlier date 3h and complete, and whole engineering 20 days at least in advance, cost can reduce 15%-20%.
Reasonable by the present invention program, explosion design safety is practical, and hole is run through in opening Forming Quality Hao great small cavities of cavern
Light quick-fried Forming Quality in room is good, can effectively control out break and country rock in-place blasting out circle.
Accompanying drawing explanation
Fig. 1 is underground chamber of the present invention big duck eye footpath through excavation construction method sequence of construction horizontal layout schematic diagram；
Fig. 2 is the A-A profile of Fig. 1；
Wherein, 1.-small cavities's advanced excavation construction, 2.-big cavern kerve step blast working, 3.-abutment wall radiation presplitting bright finish
Blast working, 4.-big cavern stage excavation construction；5.-reserved cover layer；
The direction of arrow is construction direction.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example is merely to illustrate the present invention, and should not be regarded as limiting this
Bright scope.Unreceipted concrete technology or condition person in embodiment, according to the document in this area, the technology described by specification or
Condition or carry out according to product description.Material therefor or instrument unreceipted production firm person, be and can be obtained by purchase
The conventional products obtained.
As shown in Figure 1 and 2, the through excavation construction method in a kind of underground chamber big duck eye footpath, step is as follows:
Duck eye footpath cavern advanced excavation is through to great Dong footpath cavern, when backbreaking to great Dong footpath cavern, needs in the cavern of great Dong footpath
Reserved cover layer, then moves towards kerve in the middle of direction in the cavern of great Dong footpath, and makes middle kerve and hole, duck eye footpath along cavern
The part of backbreaking of room is connected；Afterwards to explosion to be split at reserved cover layer, during explosion to be split, first radiate photoface exploision
Hole, then uses and does not couple short-delay blasting mode and carry out explosion, finally to great Dong footpath cavern stage excavation.
Concrete blasting construction method is as follows:
Step (1), wind, water, electricity are ready, and workmen, facility prepare in place；
Step (2), measures and controls: Traverse Network and construction survey, professional implement；Every artillery salvo is according to explosion design ginseng
Several somes cloth holes；Excavated section inspection is carried out before spray concrete, checks spacing 5m；3-5d laggard row conductor point checks and repetition measurement, with really
Protect and measure control accuracy；
Step (3), every artillery salvo is checked by the requirement of " flat, straight, neat " by technician on duty, accomplishes to fall quick-fried at the bottom of the hole in big gun hole
On the same vertical section of broken regulation；Meanwhile, the borehole accuracy in strict controlled blasting hole；
Step (4), sweeps boring with high-pressure blast punching before powder charge, after big gun hole is the most qualified, can carry out charge explosion；The dress in big gun hole
The on line of medicine, blocking and blasting circuit should be by through examining big gun work that is qualified and that hold dynamiter's operation quality certification strictly by approval
Hole blasting design applies, and strictly observes shotfiring safety rule of operation；
Utilizing drilling platform powder charge, blast hole powder charge is closely knit, and blocking is good, carries out powder charge in strict accordance with explosion design drawing,
Connect initiation net with on-electric detonator, finally checked inspection by big gun work and technician on duty, confirm errorless, evacuating people and setting
Standby, big gun work is responsible for ignition；
Step (5), starts ventilation installation to end of slagging tap after Excavation blasting always and ventilates, it is ensured that by harmful gas in 2h after explosion
Bulk concentration drops in allowed band, to meet " water power construction of hydro project safety protection facility technical specification " (DL5162-
2013) and the requirement of " hydraulic structure underground excavation project construction technique normalizing " (DL/T5099-2011).
Step (6), the danger stone of removing residual and fragment, to ensure personnel and the safety of equipment, carry out safety again after slagging tap
Check and process, checking whether that also danger stone exists；In work progress, need the abutment wall country rock observing excavation section constantly steady
Stable condition, clear sled may slump, loosening sillar；
Step (7), slags tap and the clear end: use 3m3Loader or 1.2m3Backhoe dress 20t dump truck is slagged tap；Use after slagging tap
Backhoe clears out work surface accumulated slag, bores quick-fried operation for subsequent cycle ready；
Step (8), surrounding rock supporting: excavate out one section of supporting one section, form multiple operation parallel construction.
Preferred embodiment is, step (2), uses YT28 hands air drill pore-creating during cloth hole.
Preferred embodiment is, step (3), the borehole accuracy in strict controlled blasting hole, and control hole is ± 2 ° to deviation, Kong Wei
Deviation ± 1cm.
Preferred embodiment is, step (6) removes the danger stone remained and fragment can be with backhoe or artificial.
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (5)
1. the through excavation construction method in underground chamber big duck eye footpath, it is characterised in that step is as follows: duck eye footpath cavern is advanced
Excavation is through to great Dong footpath cavern, when backbreaking to great Dong footpath cavern, needs reserved cover layer in the cavern of great Dong footpath, then greatly
Move towards kerve in the middle of direction in Dong Jing cavern along cavern, and middle kerve is connected with the part of backbreaking of duck eye footpath cavern；
Afterwards to explosion to be split at reserved cover layer, during explosion to be split, first radiation bright finish blast hole, then uses and does not couple elementary errors
Blasting method carries out explosion, finally to great Dong footpath cavern stage excavation.
The through excavation construction method in underground chamber the most according to claim 1 big duck eye footpath, it is characterised in that concrete explosion
Construction method is as follows:
Step (1), wind, water, electricity are ready, and workmen, facility prepare in place；
Step (2), measures and controls: Traverse Network and construction survey, professional implement；Every artillery salvo is according to explosion design ginseng
Several somes cloth holes；Excavated section inspection is carried out before spray concrete, checks spacing 5m；3-5d laggard row conductor point checks and repetition measurement, with really
Protect and measure control accuracy；
Step (3), every artillery salvo is checked by the requirement of " flat, straight, neat " by technician on duty, accomplishes to fall quick-fried at the bottom of the hole in big gun hole
On the same vertical section of broken regulation；Meanwhile, the borehole accuracy in strict controlled blasting hole；
Step (4), sweeps boring with high-pressure blast punching before powder charge, after big gun hole is the most qualified, can carry out charge explosion；The dress in big gun hole
The on line of medicine, blocking and blasting circuit should be by through examining big gun work that is qualified and that hold dynamiter's operation quality certification strictly by approval
Hole blasting design applies, and strictly observes shotfiring safety rule of operation；
Utilizing drilling platform powder charge, blast hole powder charge is closely knit, and blocking is good, carries out powder charge in strict accordance with explosion design drawing,
Connect initiation net with on-electric detonator, finally checked inspection by big gun work and technician on duty, confirm errorless, evacuating people and setting
Standby, big gun work is responsible for ignition；
Step (5), starts ventilation installation to end of slagging tap after Excavation blasting always and ventilates, it is ensured that by harmful gas in 2h after explosion
Bulk concentration drops in allowed band；
Step (6), the danger stone of removing residual and fragment, to ensure personnel and the safety of equipment, carry out safety inspection again after slagging tap
And process, check whether that also danger stone exists；In work progress, need to observe constantly the abutment wall adjoining rock stability feelings of excavation section
Condition, clear sled may slump, loosening sillar；
Step (7), slags tap and the clear end: use 3m3Loader or 1.2m3Backhoe dress 20t dump truck is slagged tap；Use after slagging tap
Backhoe clears out work surface accumulated slag, bores quick-fried operation for subsequent cycle ready；
Step (8), surrounding rock supporting: excavate out one section of supporting one section, form multiple operation parallel construction.
The through excavation construction method in underground chamber the most according to claim 2 big duck eye footpath, it is characterised in that step (2),
YT28 hands air drill pore-creating is used during cloth hole.
The through excavation construction method in underground chamber the most according to claim 2 big duck eye footpath, it is characterised in that step (3)
The borehole accuracy in strict controlled blasting hole, control hole is ± 2 ° to deviation, position, hole deviation ± 1cm.
The through excavation construction method in underground chamber the most according to claim 2 big duck eye footpath, it is characterised in that step (6)
Danger stone and the fragment of removing residual can be with backhoes or artificial.
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| CN201610752992.2A CN106285732B (en) | 2016-08-30 | 2016-08-30 | A kind of big duck eye diameter perforation excavation construction method of underground chamber |
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| CN201610752992.2A CN106285732B (en) | 2016-08-30 | 2016-08-30 | A kind of big duck eye diameter perforation excavation construction method of underground chamber |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109322683A (en) * | 2018-10-24 | 2019-02-12 | 临沂会宝岭铁矿有限公司 | Underground Large chamber medium-length hole controls blasting construction method |
| CN109488347A (en) * | 2018-10-25 | 2019-03-19 | 浙江省隧道工程公司 | A kind of excavation construction method for special formation chamber |
| CN110107323A (en) * | 2019-05-10 | 2019-08-09 | 中国电建集团华东勘测设计研究院有限公司 | It is a kind of elder generation hole after wall intersect hole excavation supporting construction method |
| CN111663946A (en) * | 2020-06-03 | 2020-09-15 | 中国水利水电第四工程局有限公司 | Variable-diameter excavation method for cavern |
| CN112065470A (en) * | 2020-09-23 | 2020-12-11 | 中铁四局集团有限公司 | Cave depot tank body excavation method |
| CN112065401A (en) * | 2020-09-23 | 2020-12-11 | 中国水利水电第七工程局有限公司 | Large-diameter vertical cavity excavation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111663946A (en) * | 2020-06-03 | 2020-09-15 | 中国水利水电第四工程局有限公司 | Variable-diameter excavation method for cavern |
| CN112065470A (en) * | 2020-09-23 | 2020-12-11 | 中铁四局集团有限公司 | Cave depot tank body excavation method |
| CN112065401A (en) * | 2020-09-23 | 2020-12-11 | 中国水利水电第七工程局有限公司 | Large-diameter vertical cavity excavation method |
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| CN106285732B (en) | 2019-01-04 |
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