CN107130977A - Super-span dome hollow be oriented in underground nuclear reactor cavern excavates structure and excavation method - Google Patents
Super-span dome hollow be oriented in underground nuclear reactor cavern excavates structure and excavation method Download PDFInfo
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- CN107130977A CN107130977A CN201710501370.7A CN201710501370A CN107130977A CN 107130977 A CN107130977 A CN 107130977A CN 201710501370 A CN201710501370 A CN 201710501370A CN 107130977 A CN107130977 A CN 107130977A
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- dome
- hollow
- pilot tunnel
- passage
- construction
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 99
- 239000011435 rock Substances 0.000 claims abstract description 17
- 231100000241 scar Toxicity 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002035 prolonged effect 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
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
- E21D19/04—Provisional protective covers for working space for use in drifting galleries
-
- 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
- E21D9/03—Driving non-circular tunnels
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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)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Structure and excavation method are excavated the invention discloses hollow be oriented to of underground nuclear reactor cavern super-span dome, the structure includes the hollow pilot tunnel positioned at dome central lower, hollow pilot tunnel is as the horizontal plane where dome profile scar middle part vertically extends to dome profile arch springing, excavation is provided between hollow pilot tunnel and cavern's rock mass to uncover face, the first construction passage and the second construction passage are provided between dome profile scar and hollow pilot tunnel, first construction passage diametrically extends from dome outward flange side to hollow pilot tunnel, second construction passage has the interconnection being located at the first construction passage in same direction, interconnection diametrically extends from dome outward flange opposite side to hollow pilot tunnel, first construction passage, interconnection is connected at hollow pilot tunnel.The present invention can reduce excavation span temporarily, and can reduce surrouding rock stress level and deformation level in work progress, and the interference of its inter process is small, can improve efficiency of construction and construction safety.
Description
Technical field
The invention belongs to nuclear power engineering technical field, in particular to a kind of underground nuclear reaction in nuclear power station development ＆ construction
Super-span dome hollow be oriented in heap cavern excavates structure and excavation method.
Background technology
China proposes in " 12 " ENERGY PLANNING, to accelerate to promote Construction of Nuclear Electricity.In the shadow of Fukushima, Japan nuclear accident
Under sound, the nuclear industry just walked out from the shade of Chernobyl has been absorbed in low ebb again.The national examination ＆ approval to nuclear power projects are more
Strict and prudent, the security requirement to nuclear power plant is higher.Then, ground nuclear power station whole or nuclear island are partially disposed in underground
Novel underground nuclear power station will provide new approach for nuclear power developing.
The third generation business underground nuclear power station cavity group that China is studied at present, its nuclear reactor cavern dome excavates span and reached
To about 48m, span is excavated much larger than existing underground nuclear power station both at home and abroad, also greater than domestic and international Hydropower Station Underground cavern
Span is excavated, therefore, its excavation technology is one of key content of underground nuclear power station feasibility.
In large-span underground chamber digging process, the stable safety of its crown is crucial.Similar dome structure, in part water power
Standing in pressure regulative wells once has application, and its excavation construction process is also to be applied in exploration：Directly from diameter end point to offside
Push forward comprehensively；Or pilot tunnel is diametrically first got through, then dig shaping by pilot tunnel both sides；Or first beaten upwards along dome Internal periphery
The pilot tunnel spiraled, then shaping is digged by pilot tunnel from top to bottom；Or first pilot tunnel is beaten to center along radius, upward pilot tunnel is connect to top
Arch, then shaping is digged from bottom to top；Or sector symmetrically digs shaping.These excavation technologies can be summarized as two classes：Vertically to branch
Push ahead or left and right is promoted or level is to slicing stoping；And these excavation technologies are mainly used in general span dome construction, no
Adapt to the excavation with super-span dome.
Super-span dome excavation such as its excavation technology in underground nuclear reactor cavern is improper, easily causes construction delay, matter
Amount it is out of control, investment increase, it is serious when even can trigger security incident.
The content of the invention
The purpose of the present invention is to solve the shortcomings of the prior art part, proposes a kind of simple program, easy construction, safety
Super-span dome hollow be oriented in reliable underground nuclear reactor cavern excavates structure and excavation method.
To achieve the above object, hollow be oriented to of underground nuclear reactor cavern super-span dome designed by the present invention is excavated
Structure, it is characterized in that, including positioned at the hollow pilot tunnel of dome central lower, the hollow pilot tunnel is by dome profile scar
The horizontal plane that middle part is vertically extended to where dome profile arch springing, is provided between the hollow pilot tunnel and cavern's rock mass
Excavation is uncovered face, and the first construction passage and the second construction passage, institute are provided between the dome profile scar and hollow pilot tunnel
State the first construction passage from dome outward flange side diametrically to hollow pilot tunnel extend, it is described second construction passage have with
First construction passage be located at same direction on interconnection, the interconnection from dome outward flange opposite side diametrically
Extend to hollow pilot tunnel, the first construction passage, interconnection are connected at hollow pilot tunnel.
Further, the second construction passage also includes two vertical passages, and two vertical passages are with laterally leading to
Road vertically, respectively diametrically extends from dome outward flange both sides to hollow pilot tunnel, exists with the first construction passage, interconnection
Connected at hollow pilot tunnel.Second construction passage is T-shaped, and further increase construction passage uncovers face.
Further, the first construction passage is on the horizontal plane where dome profile arch springing, by passage of constructing
It is arranged inside dome, saves excavation construction workload.
Further, the hollow pilot tunnel cross section is curved, and the first construction passage, interconnection, longitudinal direction are logical
Road cross section is rectangular, it is easy to construction operation.Between the hollow pilot tunnel and the first construction passage, interconnection, vertical passage
Angle be 90 °, it is easy to the current and transport in work progress.
Further, it is provided with and digs between the first construction passage, interconnection, vertical passage and cavern's rock mass
Face.Described dig is provided with gib on face, for guard at any time construction rock mass is brought deformation, destruction and
Other influences.
A kind of excavation method that structure is excavated applied to the hollow guiding of above-mentioned underground nuclear reactor cavern super-span dome,
It is characterized in that, comprises the following steps：
1) the first construction passage is excavated：Diametrically excavated, formed to dome central lower from the outer edge of dome one
First construction passage；
2) hollow pilot tunnel is excavated：Excavated straight up by the described first construction passage end, dome central lower, until vault
Profile scar is pushed up, hollow pilot tunnel is formed；
3) interconnection of the second construction passage is excavated：Diametrically excavated from hollow pilot tunnel to dome outer edge,
Form interconnection；
4) synchronously digged to dome edge along the first construction passage interconnection both sides, until forming complete dome.
Preferably, the step 3) in also include excavating the second vertical passage for constructing passage, by hollow pilot tunnel along with the
The vertical diametric(al) of one construction passage is excavated to both sides dome outer edge simultaneously, forms two vertical passages.First construction
Passage and the second construction passage surround four sector regions, are synchronously digged in construction sector region, improve efficiency of construction.
Preferably, the step 1) in first construction passage and cavern's rock mass between set dig face, digging the palm
Gib is set on sub- face.
Preferably, the step 2) in set excavation to uncover face between hollow pilot tunnel and cavern's rock mass, connect in the excavation
Show up upper setting gib.
Of the invention first to construct passage to dome interior construction along first, construction is arrived after hollow pilot tunnel, is constructed in construction second
Two half-circle areas or four fans will be surrounded inside dome after the completion of passage, the first construction passage and the second construction passage construction
Shape region, synchronous radially outer is excavated in half-circle area or sector region, can form two or four independent constructions
Region carries out operation, can reduce excavation span temporarily, and can reduce surrouding rock stress level and deformation level in work progress, and
The interference of its inter process is small, can improve efficiency of construction and construction safety.
The invention has the advantages that：
1st, deformation, the destruction in work progress to dome center rock mass are reduced, it is ensured that dome structure is stable in digging process,
Improve construction quality；
2nd, the dome division center of most fragile in engineering is formed at first, and the leading supporting in the position is handled；
3rd, construction passage, which is located at, excavates in dome structure, saves the engineering time；
4th, excavate the face that uncovers to be independently arranged by a plurality of construction passage, working face is big, and inter process interference is small.
5th, accelerate the duration, ensure that quality is out of control, improve economy, with very high safety guarantee.
Brief description of the drawings
Fig. 1, which is that underground nuclear reactor cavern super-span dome of the present invention is hollow, is oriented to the structural representation for excavating structure.
Fig. 2 is Fig. 1 I-I diagrammatic cross-sections.
In figure：Construction passage 1, hollow pilot tunnel 2 excavates the face 3 that uncovers, digs face 4, dome profile scar 5, dome wheel
Wide arch springing 6, interconnection 7, vertical passage 8.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail, but the embodiment should not be construed as pair
The limitation of the present invention.
As depicted in figs. 1 and 2, a kind of hollow be oriented to of underground nuclear reactor cavern super-span dome of the invention excavates structure
Including hollow pilot tunnel 2, the first construction construction passage of passage 1 and second.Hollow pilot tunnel 2 is located at dome central lower, by dome wheel
The horizontal plane that the wide middle part of scar 5 is vertically extended to where dome profile arch springing 6.Passage 1 of constructing is located at dome profile rock
Between face 5 and hollow pilot tunnel 2, diametrically extend at dome outward flange one to hollow pilot tunnel 2, and connect with hollow pilot tunnel 2
It is logical.
The size that the present embodiment will excavate dome is diameter 48.4m, height 13.4m；There is super-large diameter for the dome
The characteristics of, the present embodiment is used from middle outwards portion in the construction method that shape is excavated successively is dodged, to adapt to super-span dome
Excavate.
In the present embodiment, hollow pilot tunnel 2 is arranged on inside dome, and its cross section is curved, and directly about 12m is hollow to lead
Hole 2 is provided with out from the vertically extending horizontal plane being located to dome profile arch springing 6 in the middle part of dome profile scar 5, hollow pilot tunnel 2
Digging uncovers face 3；Passage 1 of constructing is located at dome centre position, and its cross section is rectangular, and the angle between hollow pilot tunnel 2 is
90 °, construction passage 1 outside at dome one diametrically extends to hollow pilot tunnel 2, construction passage 1 and the hollow phase of pilot tunnel 2
Logical, construction passage 1 both sides, which are provided with, digs face 4.
First construction passage 1 is located at dome centre position, and first construction passage 1 outside at dome one is diametrically prolonged
Hollow pilot tunnel 2 is extended, the first construction passage 1 is communicated with hollow pilot tunnel 2, and the second construction passage is T-shaped, and the second construction passage includes
The interconnection 7 communicated with hollow pilot tunnel 2 and two vertical passages 8 in diametric(al), the first construction passage
1st, the cross section of interconnection 7 and vertical passage 8 is rectangular, and the construction passage 1 of interconnection 7 and first is located at same direction,
Outer edge extends from interconnection 7 is another from hollow pilot tunnel 2 to dome, and vertical passage 8 is located at the hollow both sides of pilot tunnel 2, and longitudinal direction is logical
Road 8 extends to dome edge from hollow pilot tunnel 2, and the first construction passage 1, interconnection 7 and the both sides of vertical passage 8 are provided with expansion
Dig face 4.The cross section of first constructing pilot tunnel 1 and the second constructing pilot tunnel is in cross, and they will be divided into four inside dome
Independent sector region.
When being excavated to underground nuclear reactor cavern super-span dome, it comprises the following steps：
1) the first construction passage 1 is excavated, is diametrically excavated, is formed to dome central lower from the outer edge of dome one
First construction passage 1, sets between the first construction passage 1 and cavern's rock mass and digs face 4, set on face 4 is digged
Gib.
2) the hollow pilot tunnel 2 that digging diameter is about 12m, by first construction passage 1 end, dome central lower straight up
Excavate, until dome profile scar 5, forms hollow pilot tunnel 2, hollow pilot tunnel 2 is connected with the first construction passage 1, such constructor
Member can carry out the construction of hollow pilot tunnel 2 from construction passage 1, and the excavation of the hollow pilot tunnel 2 of supporting discloses face 3；Hollow pilot tunnel 2 with
Set excavation to uncover face 3 between cavern's rock mass, uncovered in excavation and gib is set on face 3.
3) the second construction passage is excavated, to dome edge at hollow pilot tunnel 2, is constructed by the synchronous excavation second of T-shaped excavation
The interconnection 7 of passage and two vertical passages 8, what gib was arranged at interconnection 7 and the both sides of vertical passage 8 digs the palm
Sub- face 4；
4) such first construction passage 1 and second construction passage surrounds 4 independent sector regions, in each sector region
It is interior to be digged from hollow pilot tunnel 2 is synchronous to dome edge, in digging process, supporting is carried out to the dome profile scar 5 disclosed；
It is to carry out operation in four independent construction areas, the interference of its inter process is small, therefore, can improve and apply in dome digging process
Work efficiency rate and construction safety.
In above-mentioned work progress, in order to ensure construction safety, to excavating exposure face 3, digging face 4, dome profile rock
Face 5 and dome profile arch springing 6 need emphasis supporting, big compared with other positions based on the deformation level for analyzing these positions is calculated, to close
Key control position, strengthens safety monitoring to crucial controlling position, the information such as stress, deformation can be fed back in time, are conducive to adopting in time
Take related technical measures, it is ensured that safety.
The above described is only a preferred embodiment of the present invention, not doing any formal to the structure of the present invention
Limitation.Any simple modification, equivalent variations and modification that every technical spirit according to the present invention is made to above example,
In the range of still falling within technical scheme.
Claims (10)
1. a kind of hollow be oriented to of underground nuclear reactor cavern super-span dome excavates structure, it is characterised in that：Including positioned at vault
The hollow pilot tunnel (2) of central lower is pushed up, the hollow pilot tunnel (2) vertically extends in the middle part of dome profile scar (5)
Horizontal plane where dome profile arch springing (6), is provided with excavation and uncovers face (3) between the hollow pilot tunnel (2) and cavern's rock mass,
The first construction passage (1) and the second construction passage are provided between the dome profile scar (5) and hollow pilot tunnel (2), it is described
First construction passage (1) diametrically extends from dome outward flange side to hollow pilot tunnel (2), the second construction passage tool
There is the interconnection (7) being located at the first construction passage (1) in same direction, the interconnection (7) is another from dome outward flange
Side diametrically extends to hollow pilot tunnel (2), and the first construction passage (1), interconnection (7) connect at hollow pilot tunnel (2) place
It is logical.
2. hollow be oriented to of underground nuclear reactor cavern super-span dome according to claim 1 excavates structure, its feature
It is：The second construction passage also includes two vertical passages (8), and two vertical passages (8) are hung down with interconnection (7)
Directly, diametrically extend respectively from dome outward flange both sides to hollow pilot tunnel (2), with the first construction passage (1), interconnection
(7) connected at hollow pilot tunnel (2) place.
3. hollow be oriented to of underground nuclear reactor cavern super-span dome according to claim 1 excavates structure, its feature
It is：The first construction passage (1) is on the horizontal plane where dome profile arch springing (6).
4. hollow be oriented to of underground nuclear reactor cavern super-span dome according to claim 1 excavates structure, its feature
It is：Hollow pilot tunnel (2) cross section is curved, the first construction passage (1), interconnection (7), vertical passage (8)
Cross section is rectangular.
5. a kind of hollow be oriented to of underground nuclear reactor cavern super-span dome according to claim 3 excavates structure, its
It is characterised by：It is provided with and digs between the first construction passage (1), interconnection (7), vertical passage (8) and cavern's rock mass
Face (4).
6. a kind of hollow be oriented to of underground nuclear reactor cavern super-span dome according to claim 4 excavates structure, its
It is characterised by：The hollow pilot tunnel (2) and the first angle constructed between passage (1), interconnection (7), vertical passage (8) are
90°。
7. a kind of hollow guiding excavation method of underground nuclear reactor cavern super-span dome, it is characterised in that：Including following step
Suddenly：
1) the first construction passage (1) is excavated：Diametrically excavated from the outer edge of dome one to dome central lower, form the
One construction passage (1)；
2) hollow pilot tunnel (2) is excavated：Excavated straight up by described first construction passage (1) end, dome central lower, until
Dome profile scar (5), forms hollow pilot tunnel (2)；
3) interconnection (7) of the second construction passage is excavated：Diametrically opened from hollow pilot tunnel (2) to dome outer edge
Dig, form interconnection (7)；
4) synchronously digged to dome edge along first construction passage (1) interconnection (7) both sides, until forming complete dome.
8. super-span dome hollow guiding excavation method in underground nuclear reactor cavern according to claim 7, its feature
It is：The step 3) in also include excavating the second vertical passage (8) for constructing passage, by hollow pilot tunnel (2) along being applied with first
The vertical diametric(al) of work passage (1) is excavated to both sides dome outer edge simultaneously, forms two vertical passages (8).
9. super-span dome hollow guiding excavation method in underground nuclear reactor cavern according to claim 7, its feature
It is：The step 1) in first construction passage (1) with cavern's rock mass between setting dig face (4), digging face
(4) gib is set on.
10. super-span dome hollow guiding excavation method in underground nuclear reactor cavern according to claim 7, its feature
It is：The step 2) in set excavation to uncover face (3) between hollow pilot tunnel (2) and cavern's rock mass, uncovered face in the excavation
(3) gib is set on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710501370.7A CN107130977B (en) | 2017-06-27 | 2017-06-27 | Hollow guide excavation structure and excavation method for ultra-large span dome of underground nuclear reactor cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710501370.7A CN107130977B (en) | 2017-06-27 | 2017-06-27 | Hollow guide excavation structure and excavation method for ultra-large span dome of underground nuclear reactor cavity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107130977A true CN107130977A (en) | 2017-09-05 |
| CN107130977B CN107130977B (en) | 2023-10-10 |
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| CN201710501370.7A Active CN107130977B (en) | 2017-06-27 | 2017-06-27 | Hollow guide excavation structure and excavation method for ultra-large span dome of underground nuclear reactor cavity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114109449A (en) * | 2021-11-22 | 2022-03-01 | 中国电建集团成都勘测设计研究院有限公司 | Large-span underground cavern dome supporting structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114109449A (en) * | 2021-11-22 | 2022-03-01 | 中国电建集团成都勘测设计研究院有限公司 | Large-span underground cavern dome supporting structure |
| CN114109449B (en) * | 2021-11-22 | 2023-08-08 | 中国电建集团成都勘测设计研究院有限公司 | Large-span underground cavern dome supporting structure |
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| Publication number | Publication date |
|---|---|
| CN107130977B (en) | 2023-10-10 |
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