CN106194223A - The excavation method of large-scale down stream surge-chamber dome under a kind of complex geological condition - Google Patents
The excavation method of large-scale down stream surge-chamber dome under a kind of complex geological condition Download PDFInfo
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- CN106194223A CN106194223A CN201610579821.4A CN201610579821A CN106194223A CN 106194223 A CN106194223 A CN 106194223A CN 201610579821 A CN201610579821 A CN 201610579821A CN 106194223 A CN106194223 A CN 106194223A
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 claims abstract description 57
- 239000011435 rock Substances 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 63
- 239000011241 protective layer Substances 0.000 claims description 21
- 239000004567 concrete Substances 0.000 claims description 5
- 239000011378 shotcrete Substances 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D13/00—Large underground chambers; Methods or apparatus for making them
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The present invention discloses the excavation method of large-scale down stream surge-chamber dome under a kind of complex geological condition, down stream surge-chamber dome use hands air drill coordinate bore the layering of quick-fried platform, subregion excavates, and have employed both sides, point fan-shaped stick after first middle drift, region progressively expands excavation, stress discharges by stages, the excavation construction method of dome two-ended cables supporting follow-up；Design profile line position bore angle is controlled according to concentric circular same elevation principle.Use the excavation method of the present invention, it is possible to increase excavation Forming Quality, save construction investment；Once excavate molding maximum span and the subregion of stress by effectively controlling cavern, adjust release by stages, solve the major diameter cavern dome adjoining rock stability problem under complex geological condition.
Description
Technical field
The invention belongs to construction technology in geotechnical engineering field, underground, under specifically a kind of complex geological condition, large-scale tail water is adjusted
The excavation method of pressure chamber dome.
Background technology
Conventional underground chamber adit excavates the classification according to country rock, design excavated section size, execution conditions, mode of slagging tap
Full face tunneling or layering, the scheme of subregion excavation is typically used etc. factor.The construction of down stream surge-chamber dome generally uses " cross
Excavating load ", " reserved core rock pillar method " or " after first middle drift, stick excavating load is divided in both sides " several excavation methods.Such as: three plates
Hydropower Station and slubbing Hydropower Station have employed " cross excavating load ", and Jinping hydropower station and crow East Germany power station have employed
" reserved core rock pillar method ", subregion carries out the construction of system anchor bolt and gunite concrete immediately after having excavated, finally complete pre-
Stress anchor cable construction.
At present reality can run into some hydropower station down stream surge-chamber dome maximum digging diameter 48m, reach the world built and
Building the cylinder type down stream surge-chamber of maximum gauge, having that cavern is huge, complex geologic conditions, design structural style are many
Change, the engineering characteristic that prescription is high, use conventional excavation method to there is rock mass relaxation modification and cause country rock safety and stability to be asked
The problem that topic is prominent and dome sphere curved surface structural excavation build molding difficulty is big.
Summary of the invention
By solving the excavation molding of major diameter dome and the adjoining rock stability problem that Practical Project construction is run into, the present invention carries
For the excavation method of large-scale down stream surge-chamber dome under a kind of complex geological condition, use both sides, point fan-shaped bar after first middle drift
Block, the excavation method that region progressively expands excavation, stress discharges by stages, dome two-ended cables supporting is followed up.
The present invention is realized by following technical proposal.The excavation of large-scale down stream surge-chamber dome under a kind of complex geological condition
Method, through following each step:
(1) according to down stream surge-chamber dome structure feature and construction passage deployment scenarios, down stream surge-chamber dome is divided into two
Floor nine district；
Described two-layer nine district refers to that its base plate is the Ith layer with up to position, dome summit, its end with passage of constructing for layering boundary line
Plate following dome excavation scope is the IIth layer；
The Ith layer of performance parameter according to practice of construction equipment and structure design build be divided into again I-1Layer and I-2Layer；
Ith-1Floor middle drift excavation scope is the 1. district, both sides scope according to radially carrying out subregion, I-1The protective layer excavation of layer
Scope is the 2. district, the Ith-2The middle part excavation scope of floor be the 3., 4. district, the Ith-2The outer shroud of layer reserves protective layer excavation scope
It it is the 5. district；IIth descending grade road, floor middle part excavation scope is the 6. district, and other region, the IIth layer of middle part (without descending grade road) is excavated
Scope is the 7. district, and it is the 8. district, reserved ramp excavation model of the IIth layer that the outer shroud of the IIth floor reserves protective layer excavation scope
Enclosing is the 9. district；
(2) first passing through anchoring observation hole early excise dome before dome excavation to wearing prestress anchorage cable making hole construction, dome is opened
Digging excavation and the supporting construction first completing middle drift region, middle drift excavation completes dome center immediately to wearing pre-answering after terminating
The lower rope of power anchor cable, stretching construction, then according to " fan-shaped stick method " subregion complete I-1The excavation supporting of layer protective layer, I-1
Layer is after supporting terminates, first carry out I-2The excavation of layer central region, then according to " fan-shaped stick method " subregion complete I-2Outside Ceng
Ring reserves the excavation supporting of protective layer；Ⅰ-2After layer supporting completes, use the mode in descending grade road to be excavated to II layer of floor elevation, enter
The excavation of II layer of central region of row；Then according to " fan-shaped stick method " subregion completes the excavation supporting construction of II layer of protective layer；
After II layer of whole supporting complete, more finally excavate reserved ramp；Specifically:
Ith floor first passes through construction passage and uses pad slag mode to complete the excavation in the range of the Ith Ceng① district and supporting construction, so
After complete the 2. excavation in the range of district and supporting construction, the starts the after 2. district's supporting completes, and 3. district, the excavation in the 4. district are executed
Work；Finally complete the excavation in the range of the Ith Ceng⑤ district and supporting construction；Ith layer of whole excavation supporting i.e. proceed to after completing
II layer of excavation stage；
First IIth layer use descending grade excavation with construction passage usual friendship mouth position according to the slope ratio of 12% from down stream surge-chamber dome
Mode completes the excavation in the 6. district, then completes the excavation in 7. district, middle part the, then starts the 8. excavation in district and supporting construction, the
II floor excavation supporting finally excavates the reserved ramp in the 9. district after being basically completed.
The dome excavation of described step (2) is to use hands air drill to coordinate the quick-fried platform of brill to excavate.
The of described step (2) 2. district, the 5. district, the 8. district all use fan-shaped point of stick, according to the same elevation of concentric circular
Principle in the way of long and short pricker combines, carry out horizontal photoface exploision.
The supporting construction system for use in carrying anchor pole of described step (2) uses three arm rock drilling jumbos to carry out pore-creating, hand fit puts down
Chassis completes the filling construction of anchor pole, and gunite concrete uses large-scale wet shot car to construct.
The dome two-ended cables supporting follow-up of described step (2) is during excavation and supporting construction, according to prestressed anchor
The exposure scope in site, rope hole, arranges to carry out reeving and stretching construction of prestress anchorage cable in time.Middle drift excavation exceedes dome
The distance of central point should meet the requirement of construction prestressed cable.
The present invention uses that " both sides, point fan-shaped stick after first middle drift, region progressively expands excavation, stress discharges by stages, vault
Top two-ended cables supporting follow-up " mode excavate, have the advantage that
One is by first excavating middle drift, completing the construction prestressed cable of dome center in time；With routine excavation side
Case compares, and by early excise ceiling anchor cable, reduces cavern and once excavates the maximum span of molding, and cross-cut effect is obvious,
Effectively control the lax deformation range of rock mass.
Two is that down stream surge-chamber dome uses horizontal slice, the excavation plan of plane subregion, and excavation region progressively expands, real
Adjustment by stages and the release of surrouding rock stress are showed；Compared with conventional excavation plan, owing to surrouding rock stress is adjusted several times,
Acutely adjust a series of safety problem brought due to stress after avoiding underground cavern excavation off-load.
Three is that 2., 5., 8. district is all according to " the same elevation of concentric circular former for down stream surge-chamber dome design profile line position
Reason ", the mode using " long and short pricker " to combine carries out horizontal photoface exploision, solves dome sphere curved surface structural excavation build
Problem；Compared with conventional excavation plan, due to the raising of excavation quality, decrease filling spray and resilience of later stage gunite concrete
Amount, has saved construction investment.
The excavation method of the present invention, it is possible to increase excavation Forming Quality, has saved construction investment；By effectively controlling cavern
Once excavate molding maximum span and the subregion of stress, adjust release by stages, solve the major diameter hole under complex geological condition
Room dome adjoining rock stability problem.
Accompanying drawing explanation
Fig. 1 is layering and the subregion schematic diagram of the present invention.
Fig. 2, Fig. 3, Fig. 4 and Fig. 5 are the schematic diagram excavated district by district respectively.
Fig. 6 is according to concentric circular same elevation principle, uses long and short pricker to combine the blast hole knot carrying out the explosion of horizon light face
Structure schematic diagram.
In figure: 1.-middle drift, 2.-I-1Layer protective layer, 3.-I-2Excavation scope in the middle part of Ceng, 4.-I-2Open in the middle part of Ceng
Dig scope, 5.-I-2Outer shroud reserves protective layer, 6.-II layer of descending grade road excavation scope, excavation area, 7.-II layer of middle part, and 8.-II
Layer outer shroud reserves protective layer, 9.-reserved ramp.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described.
Embodiment 1
(1) according to down stream surge-chamber dome structure feature and construction passage deployment scenarios, down stream surge-chamber dome is divided into two
Floor nine district；
Described two-layer nine district refers to that its base plate is the Ith layer with up to position, dome summit, its end with passage of constructing for layering boundary line
Plate following dome excavation scope is the IIth layer；
The Ith layer of performance parameter according to practice of construction equipment and structure design build be divided into again I-1Layer and I-2Layer；
Ith-1Floor middle drift excavation scope is the 1. district, I-1The protective layer excavation scope of floor is the 2. district, the Ith-2The middle part of layer
Excavation scope be 3., 4. district, the Ith-2It is the 5. district that the outer shroud of floor reserves protective layer excavation scope；Descending grade road, IIth layer of middle part
Excavation scope is the 6. district, and the IIth other region, floor middle part (without descending grade road) excavation scope is the 7. district, outer shroud of the IIth layer
Reserved protective layer excavation scope is the 8. district, and the reserved ramp excavation scope of the IIth floor is the 9. district；
(2) first passing through anchoring observation hole early excise dome before dome excavation to wearing prestress anchorage cable making hole construction, dome is opened
Digging excavation and the supporting construction first completing middle drift region, middle drift excavation completes dome center immediately to wearing pre-answering after terminating
The lower rope of power anchor cable, stretching construction, then according to " fan-shaped stick method " subregion complete I-1The excavation supporting of layer protective layer, I-1
Layer is after supporting terminates, first carry out I-2The excavation of layer central region, then according to " fan-shaped stick method " subregion complete I-2Outside Ceng
Ring reserves the excavation supporting of protective layer；Ⅰ-2After layer supporting completes, use the mode in descending grade road to be excavated to II layer of floor elevation, enter
The excavation of II layer of central region of row；Then according to " fan-shaped stick method " subregion completes the excavation supporting construction of II layer of protective layer；
After II layer of whole supporting complete, more finally excavate reserved ramp；Specifically:
Ith floor first passes through construction passage and uses pad slag mode to complete the excavation in the range of the Ith Ceng① district and supporting construction, so
After complete the 2. excavation in the range of district and supporting construction, the starts the after 2. district's supporting completes, and 3. district, the excavation in the 4. district are executed
Work；Finally complete the excavation in the range of the Ith Ceng⑤ district and supporting construction；Ith layer of whole excavation supporting i.e. proceed to after completing
II layer of excavation stage；
First IIth layer use descending grade excavation with construction passage usual friendship mouth position according to the slope ratio of 12% from down stream surge-chamber dome
Mode completes the excavation in the 6. district, then completes the excavation in 7. district, middle part the, then starts the 8. excavation in district and supporting construction, the
II floor excavation supporting finally excavates the reserved ramp in the 9. district after being basically completed；
Wherein, the 2. district, the 5. district, the 8. district all use fan-shaped point of stick, according to the principle of the same elevation of concentric circular with long and short
The mode that pricker combines carries out horizontal photoface exploision；
Above-mentioned supporting construction system for use in carrying anchor pole uses three arm rock drilling jumbos to carry out pore-creating, hand fit's platform truck completes anchor pole
Filling is constructed, and gunite concrete uses large-scale wet shot car to construct；Dome two-ended cables supporting follow-up is in excavation and supporting
Construction period, according to the exposure scope in site, prestress anchorage cable hole, arrange in time to carry out prestress anchorage cable reeve and stretch-draw is executed
Work.
Claims (5)
1. the excavation method of large-scale down stream surge-chamber dome under a complex geological condition, it is characterised in that through following each step
Rapid:
(1) according to down stream surge-chamber dome structure feature and construction passage deployment scenarios, down stream surge-chamber dome is divided into two
Floor nine district；
Described two-layer nine district refers to that its base plate is the Ith layer with up to position, dome summit, its end with passage of constructing for layering boundary line
Plate following dome excavation scope is the IIth layer；
The Ith layer of performance parameter according to practice of construction equipment and structure design build be divided into again I-1Layer and I-2Layer；
Ith-1Floor middle drift excavation scope is the 1. district, both sides scope according to radially carrying out subregion, I-1The protective layer excavation model of layer
Enclosing is the 2. district, the Ith-2The middle part excavation scope of floor be the 3., 4. district, the Ith-2The outer shroud of layer is reserved protective layer excavation scope and is
5. district；IIth descending grade road, floor middle part excavation scope is the 6. district, and the IIth other region, floor middle part excavation scope is the 7. district, the
It is the 8. district that the outer shroud of II floor reserves protective layer excavation scope, and the reserved ramp excavation scope of the IIth floor is the 9. district；
(2) first passing through anchoring observation hole early excise dome before dome excavation to wearing prestress anchorage cable making hole construction, dome is opened
Digging excavation and the supporting construction first completing middle drift region, middle drift excavation completes dome center immediately to wearing pre-answering after terminating
The lower rope of power anchor cable, stretching construction, then according to " fan-shaped stick method " subregion complete I-1The excavation supporting of layer protective layer, I-1
Layer is after supporting terminates, first carry out I-2The excavation of layer central region, then according to " fan-shaped stick method " subregion complete I-2Outside Ceng
Ring reserves the excavation supporting of protective layer；Ⅰ-2After layer supporting completes, use the mode in descending grade road to be excavated to II layer of floor elevation, enter
The excavation of II layer of central region of row；Then according to " fan-shaped stick method " subregion completes the excavation supporting construction of II layer of protective layer；
After II layer of whole supporting complete, more finally excavate reserved ramp；Specifically:
Ith floor first passes through construction passage and uses pad slag mode to complete the excavation in the range of the Ith Ceng① district and supporting construction, so
After complete the 2. excavation in the range of district and supporting construction, the starts the after 2. district's supporting completes, and 3. district, the excavation in the 4. district are executed
Work；Finally complete the excavation in the range of the Ith Ceng⑤ district and supporting construction；Ith layer of whole excavation supporting i.e. proceed to after completing
II layer of excavation stage；
First IIth layer use descending grade excavation with construction passage usual friendship mouth position according to the slope ratio of 12% from down stream surge-chamber dome
Mode completes the excavation in the 6. district, then completes the excavation in 7. district, middle part the, then starts the 8. excavation in district and supporting construction, the
II floor excavation supporting finally excavates the reserved ramp in the 9. district after being basically completed.
The excavation method of large-scale down stream surge-chamber dome under complex geological condition the most according to claim 1, its feature exists
In: the dome excavation of described step (2) is to use hands air drill to coordinate the quick-fried platform of brill to excavate.
The excavation method of large-scale down stream surge-chamber dome under complex geological condition the most according to claim 1, its feature exists
In: described step (2) the 2. district, the 5. district, the 8. district all use fan-shaped point of stick, according to the principle of the same elevation of concentric circular
Horizontal photoface exploision is carried out in the way of long and short pricker combines.
The excavation method of large-scale down stream surge-chamber dome under complex geological condition the most according to claim 1, its feature exists
Three arm rock drilling jumbos are used to carry out pore-creating, hand fit's platform truck in: the supporting construction system for use in carrying anchor pole of described step (2) complete
Becoming the filling construction of anchor pole, gunite concrete uses large-scale wet shot car to construct.
The excavation method of large-scale down stream surge-chamber dome under complex geological condition the most according to claim 1, its feature exists
In: the dome two-ended cables supporting follow-up of described step (2) is during excavation and supporting construction, according to position, prestress anchorage cable hole
The exposure scope of point, arranges to carry out reeving and stretching construction of prestress anchorage cable in time.
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| CN201610579821.4A CN106194223A (en) | 2016-07-21 | 2016-07-21 | The excavation method of large-scale down stream surge-chamber dome under a kind of complex geological condition |
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| CN201610579821.4A CN106194223A (en) | 2016-07-21 | 2016-07-21 | The excavation method of large-scale down stream surge-chamber dome under a kind of complex geological condition |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288654A (en) * | 2017-06-27 | 2017-10-24 | 长江勘测规划设计研究有限责任公司 | Super-span dome hollow ring in underground nuclear reactor cavern excavates structure and excavation method |
| CN108755622A (en) * | 2018-07-25 | 2018-11-06 | 中国水利水电第十四工程局有限公司 | A kind of excavation method of large-diameter circular cartridge type down stream surge-chamber |
| CN111550249A (en) * | 2020-05-14 | 2020-08-18 | 中国水利水电第五工程局有限公司 | Method for excavating hyperbolic inverted suspension dome in vertical shaft |
| 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 |
| CN112127920A (en) * | 2020-09-23 | 2020-12-25 | 中铁四局集团有限公司 | One-step molding sector excavation method for double-curved-surface cave depot dome |
| CN112145185A (en) * | 2020-09-23 | 2020-12-29 | 中铁四局集团有限公司 | Hyperboloid cave depot dome excavation method |
| CN112412502A (en) * | 2020-12-16 | 2021-02-26 | 中铁四局集团有限公司 | Excavation method for one-step blasting forming of cave depot tank body |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288654A (en) * | 2017-06-27 | 2017-10-24 | 长江勘测规划设计研究有限责任公司 | Super-span dome hollow ring in underground nuclear reactor cavern excavates structure and excavation method |
| CN108755622A (en) * | 2018-07-25 | 2018-11-06 | 中国水利水电第十四工程局有限公司 | A kind of excavation method of large-diameter circular cartridge type down stream surge-chamber |
| CN108755622B (en) * | 2018-07-25 | 2023-05-09 | 中国水利水电第十四工程局有限公司 | Excavation method of large-diameter cylindrical tail water pressure regulating chamber |
| CN111550249A (en) * | 2020-05-14 | 2020-08-18 | 中国水利水电第五工程局有限公司 | Method for excavating hyperbolic inverted suspension dome in vertical shaft |
| CN111550249B (en) * | 2020-05-14 | 2021-10-22 | 中国水利水电第五工程局有限公司 | Method for excavating hyperbolic inverted suspension dome in vertical shaft |
| 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 |
| CN112127920A (en) * | 2020-09-23 | 2020-12-25 | 中铁四局集团有限公司 | One-step molding sector excavation method for double-curved-surface cave depot dome |
| CN112145185A (en) * | 2020-09-23 | 2020-12-29 | 中铁四局集团有限公司 | Hyperboloid cave depot dome excavation method |
| CN112412502A (en) * | 2020-12-16 | 2021-02-26 | 中铁四局集团有限公司 | Excavation method for one-step blasting forming of cave depot tank body |
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Application publication date: 20161207 |