CN105821817A - Method for excavating semicircular dome of giant cylindrical surge chamber - Google Patents
Method for excavating semicircular dome of giant cylindrical surge chamber Download PDFInfo
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- CN105821817A CN105821817A CN201610173667.0A CN201610173667A CN105821817A CN 105821817 A CN105821817 A CN 105821817A CN 201610173667 A CN201610173667 A CN 201610173667A CN 105821817 A CN105821817 A CN 105821817A
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- chamber
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 40
- 238000009423 ventilation Methods 0.000 claims abstract description 18
- 238000009412 basement excavation Methods 0.000 claims description 76
- 239000010410 layer Substances 0.000 claims description 35
- 239000011241 protective layer Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 6
- 238000005422 blasting Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 244000098338 Triticum aestivum Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013439 planning Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
- E02B9/06—Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- 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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a method for excavating a semicircular dome of a giant cylindrical surge chamber. By means of the method for excavating the semicircular dome of the giant cylindrical surge chamber, construction safety can be ensured, the project construction progress is met, and the dome excavating formation quality, the adjoining rock stability and the down digging safety of a well bore of the surge chamber are guaranteed. According to the technical scheme, the method for excavating the semicircular dome of the giant cylindrical surge chamber is characterized in that the dome is excavated by being divided into an upper layer and a lower layer from top to bottom through a ventilation hole bottom board, and the upper layer is divided into a first layer and a second layer from top to bottom. The method for excavating the semicircular dome of the giant cylindrical surge chamber is suitable for water conservancy and hydropower projects.
Description
Technical field
The present invention relates to a kind of huge cylindrical surge chamber semi-circular vault excavation method.It is applicable to Hydraulic and Hydro-Power Engineering.
Background technology
Construction along with western Huge Power Stations such as Jinping I, crow East Germany, voe, waxy common wheat, the size of surge-chamber, scale are gradually increased accordingly, Jinping I drum type brake down stream surge-chamber maximum gauge has reached 41m, and crustal stress is high, complex geologic conditions, ensure that the excavation molding of huge surge-chamber dome becomes most important, first in the middle part of surge-chamber top layer, one vertical shaft of excavation is to dome top for the general employing of current domestic main surge-chamber dome construction, and then from dome top, layering is excavated downwards.
Planning to build certain Huge Power Station drum type brake down stream surge-chamber western, its dome structure be semicircle, diameter 48m, well bore height about 100m, for current the most built and building maximum-norm down stream surge-chamber.Geological conditions is relative complex, inter-laminar dislocation band, tomography, prismatical joint country rock and the adverse effect of high-ground stress, dome easily lax deformation, collapsing and breaking after excavation, it is ensured that under complex geological condition, huge cylindrical surge chamber semi-circular vault excavation Forming Quality and construction safety are emphasis and the difficult points of engineering construction.
Summary of the invention
The technical problem to be solved in the present invention is: for the problem of above-mentioned existence, a kind of huge cylindrical surge chamber semi-circular vault excavation method is provided, to ensure the safety of construction, meet engineering construction progress, it is ensured that under dome excavation Forming Quality and adjoining rock stability and surge-chamber well bore, dig safety.
The technical solution adopted in the present invention is: a kind of huge cylindrical surge chamber semi-circular vault excavation method, it is characterised in that: dome is divided into upper and lower two-layer with ventilation hole base plate for boundary from top to down and excavates, and upper strata is divided into first, second layer from top to down；
The excavation step of described dome is as follows:
1, excavation top area；
1.1, ground floor excavation construction is carried out:
With ventilation hole for the region at ventilation hole to surge-chamber center in construction ground settlement and tunnel ground floor, form the pilot tunnel connected with hole of ventilating；
With pilot tunnel for construction passage, excavate the zone line I with surge-chamber center as the center of circle in ground floor, and reserve ring protection layer I at zone line I periphery；
1.2, second layer excavation construction is carried out:
Form, along surge-chamber centrage excavation, the guide groove connected with ventilation hole in ventilation hole for construction passage, the second layer；
With guide groove for construction passage, excavate the zone line II with surge-chamber center as the center of circle in the second layer, and reserve ring protection layer II at zone line II periphery；
1.3, after zone line II excavation completes, the excavation construction of ring protection layer I, II is carried out；
2, excavation lower region；
2.1, it is construction passage with hole of ventilating, is excavated to along surge-chamber centrage descending grade the design floor elevation position of lower floor, form the ramp connected with hole of ventilating；
2.2, with ramp for construction passage, excavate the zone line III with surge-chamber center as the center of circle in lower floor, and reserve ring protection layer III at zone line III periphery；
2.3, after zone line III excavation completes, ring protection layer III is excavated；
2.4, ramp is excavated.
Described zone line I, ring protection layer I and ring protection layer II all use and are divided into some fan-shaped sticks and annularly carry out the mode of excavation construction.
Described pilot tunnel uses bottom advanced excavation, and the mode of protective layer follow-up excavation is reserved at top.
Described zone line I uses top to reserve protective layer, and during excavation, toe cut advanced 1～2 artillery salvo, then top protection layer dig the mode of follow-up.
Dome excavates completion system bolt-spary supports and the construction of anchor cable after design profile line.
Dome peripheral profile line often discharges into chi less than or equal to 2.0m.
The gradient of described ramp is 12%.
The invention has the beneficial effects as follows: the present invention uses " both sides, point fan-shaped stick after first middle drift " excavation plan, it is ensured that the safety of construction, meets engineering construction progress, it is ensured that dig safety under dome excavation Forming Quality and adjoining rock stability and surge shaft well bore.
Accompanying drawing explanation
Fig. 1 is the layering schematic diagram of embodiment.
Fig. 2 is the layering and zoning schematic diagram of embodiment.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the B-B sectional view of Fig. 2.
Fig. 5 is the C-C sectional view of Fig. 2.
Fig. 6 be in embodiment 2., 5. district's excavation procedure schematic diagram.
Detailed description of the invention
As shown in Fig. 1～5, the present embodiment is with a diameter of 48m, and as a example by the surge-chamber of well bore height about 100m, surge-chamber dome structure is semicircle, and dome divides 9 regions of upper and lower two-layer to excavate with ventilation hole 1 base plate for boundary from top to bottom.
1), upper strata 2 is layered and piecemeal
The excavation height on down stream surge-chamber dome upper strata is 15.5m, and excavation uses the excavation procedure of first intermediate and then both sides.Upper strata is divided into 5 pieces of regions of 2 substratums (first, second layer 21,22) to carry out excavation supporting from top to down.
1.1), ground floor 21 height be 10.5m, Ceng Neifen 2 district excavate.The 1. district be that tail adjusts ventilation hole to adjust the pilot tunnel between dome center to tail, the 2. district be the zone line I (shown in Fig. 3) with surge-chamber center for center of circle radius 15m.
1.2), the second layer 22 height be 5m, be divided into 3rd district to excavate in floor.The 3. district be the guide groove region connected with ventilation hole along surge-chamber centrage pumping slot excavation; 4. district be the zone line II with surge-chamber center for center of circle radius 15m, 5. district be that periphery reserves ring protection floor (including the ring protection floor II of 2. ring protection floor I and 4. district's periphery of district's periphery) (shown in Fig. 4).
As shown in Figure 6, in this example, 2. divide into 43 pieces and excavate, and 5. divide into 65 pieces excavates, and every 7 pieces are 2.0m as an excavation supporting unit, artillery salvo drilling depth.
2), lower floor 3 layer height and piecemeal
As shown in Fig. 2, Fig. 5, Wei Tiaoshi dome lower floor uses the form of descending grade excavation along surge-chamber centrage, and descending grade height is 4m, and descending grade excavation is adjusted ventilation hole to enter by tail, carrying out descending grade along surge-chamber centrage by the gradient of 12% and complete the excavation supporting of this part, descending grade ramp width is 9.0m.Lower floor is divided into 4 pieces to excavate, the 6. district be middle kerve descending grade region, the 7. district be surge-chamber center be the zone line III of center of circle radius 19.44m, the 8. district be the 7. district's circumferential annular protective layer III, the 9. district be the reserved ramp of lower floor.
The construction method of the present embodiment is as follows:
1, excavation upper strata.
1.1, the ground floor excavation construction on upper strata is carried out.
1.1.1, down stream surge-chamber dome upper strata excavation utilizes tail to adjust ventilation hole as construction passage, after tail adjusts ventilation hole excavated surface to pass the down stream surge-chamber borehole wall, first completing locked anchor bar supporting, then pad slag uphill slope carries out the excavation in down stream surge-chamber dome part the 1. district.The 1. district's excavation use bottom pilot tunnel advanced, the mode of protective layer excavation follow-up is reserved at top；Bottom pilot tunnel and top are reserved protective layer excavation and are used drilling cramp chassis tennis partner's air drill photoface exploision.
1.2.1, dome middle drift excavation and after supporting completes, point fan-shaped, circumferentially carry out the excavation in dome the 2. district.The 2. district's excavation time, for ensureing dome Forming Quality, 2m thickness protective layer is reserved at top, and during excavation, toe cut advanced 1～2 artillery salvo, then top protection layer dig follow-up.2. district's excavation employing drilling cramp chassis tennis partner's air drill drillhole blasting, the employing photoface exploision of periphery design contour line position.
1.2, the second layer excavation construction on upper strata is carried out.
1.2.1, after dome ground floor excavation supporting is fully completed, the construction of the second layer is started.The second layer completes the excavation in the 3. district initially with the mode of the horizontal drill-blast tunnelling of hands air drill.The 4. district use hands air drill horizontal blasting or hidden hole drilling vertical pore-creating heading blast to excavate.5. district's employing drilling cramp chassis tennis partner's air drill hoop horizontal blasting, periphery design contour line position uses photoface exploision.
2, excavation lower floor.After dome upper strata excavation supporting completes, utilize tail to adjust ventilation hole as construction passage, carry out the excavation supporting of dome lower floor along surge-chamber centrage by the gradient descending grade of 12%.The 6. district's descending grade section use hands air drill horizontal blasting to be excavated to dome lower floor excavation design floor elevation position; then excavate to both sides respectively with reserved ramp for boundary; zone line during excavation (the 7. district) advanced >=15m, then the 8. district reserve ring protection floor III excavation follow-up；The 8. district's construction use hands air drill to join the brill horizontal drill-blast tunnelling of quick-fried paralell, design profile line position uses photoface exploision.The 9. district reserve ramp and arrange again to excavate after dome lower floor excavation supporting completes.
Dome should complete in time after excavating design profile line after system bolt-spary supports and the construction of anchor cable, with avoid dome country rock due to deformation and stress relaxation occur destroy.System anchor bolt uses three arm rock drilling jumbo pore-creating, hand fit's platform truck filling anchor pole；Gunite concrete uses spray car to execute spray；Dome adjusts anchoring to hole downwards in observing access tunnel from tail to wearing prestress anchorage cable in advance, and carrying out system anchor bolt supporting for dome after excavating in time provides condition, and after avoiding rockbolt installation, anchor cable gets into anchor pole simultaneously.
For controlling spherical crown contour line specification, down stream surge-chamber dome peripheral profile line often discharges into chi and cannot be greater than 2.0m, it is ensured that dome molding, wall completely and are stablized.
Claims (7)
1. a huge cylindrical surge chamber semi-circular vault excavation method, it is characterised in that: dome is that boundary is divided into upper and lower two-layer and excavates with ventilation hole (1) base plate from top to down, and upper strata is divided into first, second layer (21,22) from top to down；
The excavation step of described dome is as follows:
1.1, excavation upper strata (2) region；
1.1.1 ground floor (21) excavation construction, is carried out:
With ventilation hole for the region at ventilation hole to surge-chamber center in construction ground settlement and tunnel ground floor, form the pilot tunnel connected with hole of ventilating；
With pilot tunnel for construction passage, excavate the zone line I with surge-chamber center as the center of circle in ground floor, and reserve ring protection layer I at zone line I periphery；
1.1.2 the second layer (22) excavation construction, is carried out:
Form, along surge-chamber centrage excavation, the guide groove connected with ventilation hole in ventilation hole for construction passage, the second layer；
With guide groove for construction passage, excavate the zone line II with surge-chamber center as the center of circle in the second layer, and reserve ring protection layer II at zone line II periphery；
1.1.3, after zone line II excavation completes, the excavation construction of ring protection layer I, II is carried out；
1.2, excavation lower floor (3) region；
1.2.1 it is, construction passage with hole of ventilating, is excavated to along surge-chamber centrage descending grade the design floor elevation position of lower floor, form the ramp connected with hole of ventilating；
1.2.2, with ramp for construction passage, excavate the zone line III with surge-chamber center as the center of circle in lower floor, and reserve ring protection layer III at zone line III periphery；
1.2.3, after zone line III excavation completes, ring protection layer III is excavated；
1.2.4, excavate ramp.
Huge cylindrical surge chamber semi-circular vault excavation method the most according to claim 1, it is characterised in that: described zone line I, ring protection layer I and ring protection layer II all use and are divided into some fan-shaped sticks and annularly carry out the mode of excavation construction.
Huge cylindrical surge chamber semi-circular vault excavation method the most according to claim 1, it is characterised in that: described pilot tunnel uses bottom advanced excavation, and the mode of protective layer follow-up excavation is reserved at top.
Huge cylindrical surge chamber semi-circular vault excavation method the most according to claim 1 and 2; it is characterized in that: described zone line I uses top to reserve protective layer, during excavation, toe cut advanced 1～2 artillery salvo, then top protection layer dig the mode of follow-up.
Huge cylindrical surge chamber semi-circular vault excavation method the most according to claim 1, it is characterised in that: dome excavates completion system bolt-spary supports and the construction of anchor cable after design profile line.
Huge cylindrical surge chamber semi-circular vault excavation method the most according to claim 1, it is characterised in that: dome peripheral profile line often discharges into chi less than or equal to 2.0m.
Huge cylindrical surge chamber semi-circular vault excavation method the most according to claim 1, it is characterised in that: the gradient of described ramp is 12%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610173667.0A CN105821817A (en) | 2016-03-24 | 2016-03-24 | Method for excavating semicircular dome of giant cylindrical surge chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610173667.0A CN105821817A (en) | 2016-03-24 | 2016-03-24 | Method for excavating semicircular dome of giant cylindrical surge chamber |
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| CN105821817A true CN105821817A (en) | 2016-08-03 |
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| CN201610173667.0A Pending CN105821817A (en) | 2016-03-24 | 2016-03-24 | Method for excavating semicircular dome of giant cylindrical surge chamber |
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Cited By (5)
| 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 |
| CN111456741A (en) * | 2020-04-10 | 2020-07-28 | 中国水利水电第一工程局有限公司 | Method for excavating dome of medium-sized cylindrical water diversion surge chamber |
| 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 |
| CN112267887A (en) * | 2020-10-20 | 2021-01-26 | 黄河勘测规划设计研究院有限公司 | Excavation construction method for extra-large section tunnel with city gate hole |
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| CN103174429A (en) * | 2013-03-01 | 2013-06-26 | 河海大学 | Underground cavity extra-large dome excavating construction method |
| CN203200726U (en) * | 2013-04-02 | 2013-09-18 | 中国水电顾问集团成都勘测设计研究院 | Special-shaped large-span impedance board structure for cylindrical surge chamber |
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2016
- 2016-03-24 CN CN201610173667.0A patent/CN105821817A/en active Pending
Patent Citations (4)
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| CN103174429A (en) * | 2013-03-01 | 2013-06-26 | 河海大学 | Underground cavity extra-large dome excavating construction method |
| CN203200726U (en) * | 2013-04-02 | 2013-09-18 | 中国水电顾问集团成都勘测设计研究院 | Special-shaped large-span impedance board structure for cylindrical surge chamber |
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Non-Patent Citations (1)
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Cited By (5)
| 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 |
| CN111456741A (en) * | 2020-04-10 | 2020-07-28 | 中国水利水电第一工程局有限公司 | Method for excavating dome of medium-sized cylindrical water diversion surge chamber |
| 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 |
| CN112267887A (en) * | 2020-10-20 | 2021-01-26 | 黄河勘测规划设计研究院有限公司 | Excavation construction method for extra-large section tunnel with city gate hole |
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