CN106640118A - Underground cavity arch crown structure, underground cavity and underground cavity construction method - Google Patents
Underground cavity arch crown structure, underground cavity and underground cavity construction method Download PDFInfo
- Publication number
- CN106640118A CN106640118A CN201710134481.9A CN201710134481A CN106640118A CN 106640118 A CN106640118 A CN 106640118A CN 201710134481 A CN201710134481 A CN 201710134481A CN 106640118 A CN106640118 A CN 106640118A
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- Prior art keywords
- hole
- construction
- auxiliary stress
- cavern
- stress hole
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- 238000010276 construction Methods 0.000 title claims abstract description 76
- 239000011435 rock Substances 0.000 claims abstract description 31
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 7
- 238000009412 basement excavation Methods 0.000 claims description 13
- 238000004873 anchoring Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000011150 reinforced concrete Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 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
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- 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
-
- 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
Landscapes
- 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)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses an underground cavity arch crown structure. The underground cavity arch crown structure comprises an arch crown part located at the top of a main cavity, construction transportation cavities formed by longitudinally digging rock mass at the two sides of the main cavity and auxiliary stress cavities arranged to be tightly attached to the upper surface of the arch crown in a crossing mode, and multiple auxiliary stress cavities are formed longitudinally and communicated with the construction transportation cavities; the auxiliary stress cavities are filled with reinforced concrete through pouring, and a prestress anchor cable stretching up into the rock mass is arranged on each auxiliary stress cavity. The underground cavity arch crown structure is convenient and fast to construct, supporting and reinforcing of the arch crown of the main cavity is completed before the main cavity is dug to form a steady arch crown structure, the effect of reinforcing in advance is achieved, the integrity of surrounding rock is improved, and own bearing capacity of the surrounding rock is effectively brought into play. Compared with the conventional construction technology, safety, reliability and stability of the whole cavity are remarkably improved, and the underground cavity arch crown structure is particularly suitable for a super-large-span underground cavity with complex geological conditions and extremely poor surrounding rock stability.
Description
Technical field
The invention belongs to underground engineering, and in particular to a kind of underground cavern crown structure, underground chamber and underground chamber are applied
Work method, is particularly suited for super-span underground chamber under complex geological condition.
Background technology
The section span of conventional underground chamber is usually no more than 40 meters, the reinforcing to underground cavern crown, conventional measure
After for cavern excavation, then using the supporting type of some support.
The span of large section cavern often reaches 60-70 rice.Conventional supporting measure due to exist excavation slag tap the duration with
In the supporting construction cycle, it is latter until supporting construction is completed that face explosion forms cavern, a period of time is needed during this, so as to make
There is engineering safety hidden danger in a period of time interior non-support in cavitation ceiling arch.
Large section cavern under the complex geological condition such as poor for surrounding rock of chamber condition, usually due to surrounding rock of chamber condition
Difference causes cavern's crown excavate molding, just caves in therewith after excavation, it is impossible to form conventional cavern.Can even excavate
The geological conditions of molding, as the span of large section cavern is excessive, using conventional support form, also results in cavern's crown and encloses
Rock is unstable.
The problems referred to above are being limited by various conditions, the super large being arranged in the poor stratum of complex geologic conditions, wall rock condition
It is especially prominent in span underground chamber.
In addition, the direction vocabulary to being previously mentioned in this case is defined, in the art, technical staff generally assert longitudinal direction
It is the direction along underground chamber depth；It is laterally the direction of underground chamber transverse section, perpendicular to underground chamber axis.
The content of the invention
For the problems referred to above, the present invention is intended to provide a kind of underground cavern crown structure of safety and firmness, supporting underground
Cavern and Cavity Construction method.
The technical scheme of solve problem of the present invention is：A kind of underground cavern crown structure, including positioned at main Mass Near The Top of Underground Cavity
Crown portion, be additionally included in the rock mass of main cavern both sides dig along longitudinal direction construction transportation hole, be close to crown portion upper surface across
The auxiliary stress hole of setting, the auxiliary stress hole are provided with multiple along longitudinal direction, and connect with construction transportation hole；
Pour in the auxiliary stress hole and be filled with armored concrete, be equipped with each auxiliary stress hole and extend upwardly into rock mass
Prestress anchorage cable.
In such scheme, bearing beam is formed after the pouring reinforcement concrete of auxiliary stress hole, is pulled by prestress anchorage cable,
Ensure stablizing for crown portion.
Further, pour in the construction transportation hole and be filled with armored concrete, be filled with the solid of armored concrete
Construction transportation hole is the bearing for aiding in stress hole；The construction transportation hole is externally provided with the anchoring piece for stretching into rock mass, to construction transportation
Hole pulls.
Construction transportation hole forms stress bearing, can further increase the ability that load is born in auxiliary stress hole.Anchoring piece
For anchor pole or anchor cable, construction transportation hole is formed by anchor pole or anchor cable and pulled, by increasing capacitance it is possible to increase the bearing capacity in construction transportation hole.
The arrangement in auxiliary stress hole has various, e.g., interval setting between the adjacent auxiliary stress hole.
Or, continuously arrange between the adjacent auxiliary stress hole.
Further, the transverse section in the auxiliary stress hole is arch or linear type.Preferably arch, domes are born
Power is bigger.
Preferably, the prestress anchorage cable is radially arranged.
Meanwhile, the present invention also provides a kind of underground chamber, including main cavern, and the top of the main cavern is such scheme institute
The crown structure stated.
Accordingly, the present invention also provides a kind of Cavity Construction method, comprises the steps：
a）Before the construction of main cavern excavation, in the rock mass that main cavern region both sides are excavated in design, along longitudinal excavation construction traffic
Hole；
b）With the construction transportation hole of wherein side as starting point, the construction transportation hole of opposite side as terminal, be close to crown portion upper table
Auxiliary stress hole is laterally excavated in face, and auxiliary stress hole is provided with multiple along longitudinal direction, and connects with construction transportation hole；In auxiliary stress hole
Interior laying reinforcing bar or formed steel construction, and stress hole is aided in concreting filling is whole；
c）Construct upwards prestress anchorage cable from auxiliary stress hole, until deeply aiding in the rock mass above stress hole and fixed；
e）The excavation of main cavern is carried out, after excavating molding, auxiliary stress hole is directly becoming with the area segments that are connected of main Mass Near The Top of Underground Cavity
A part for main cavern；Afterwards, carry out main cavern support construction.
In above-mentioned work progress, construction transportation hole adopts anchor pole or cable bolting.
Further, in step c）Afterwards, step e）Step d is additionally provided with before）Pouring reinforcement is mixed in the construction transportation hole
Solidifying soil, makes the construction transportation hole of both sides form the bearing in auxiliary stress hole；Then it is externally provided with construction transportation hole and stretches into rock mass
Anchoring piece, pulls to construction transportation hole.
Further, the arrangement form in stress hole is aided in determine after being considered according to cavern span, geological conditions, one
Plant in specific scheme：
Step b）In interval setting between adjacent auxiliary stress hole；
Step c）In prestress anchorage cable on each auxiliary stress hole radially arrange.
In another kind of specific scheme：
Step b）In continuously arrange between adjacent auxiliary stress hole, the auxiliary stress hole of continuous arrangement using storehouse construction is jumped, finally
Form entirety closely.
The present invention not only easy construction, quick, and the supporting in main cavern's crown portion is completed before main cavern excavation add
Gu, firm crown structure is formed, the effect of prior reinforcing is achieved, be increased country rock globality, effectively play country rock itself
Bearing capacity.Compared to conventional construction technology, the overall safety in cavern, reliability and stability are significantly improved, it is especially suitable
In complex geologic conditions, the super-span underground chamber of surrounding rock stability extreme difference.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is 1 underground chamber drawing in side sectional elevation of embodiment.
Fig. 2 is 1 underground chamber profilograph of embodiment.
Fig. 3 is 2 underground chamber drawing in side sectional elevation of embodiment.
Fig. 4 is 2 underground chamber profilograph of embodiment.
In figure：1-auxiliary stress hole, 2-construction transportation hole, 3-prestress anchorage cable, 5-main cavern, 8- anchor poles.
Specific embodiment
Embodiment 1
As shown in Fig. 1～2, a kind of underground cavern crown structure, including the crown portion at the top of main cavern 5,5 liang of main cavern
The construction transportation hole 2 dug along longitudinal direction in the rock mass of side, it is close to crown portion upper surface across the auxiliary stress hole 1 for arranging.
The auxiliary stress hole 1 is longitudinally spaced to be provided with multiple, and connects with construction transportation hole 2.
Pour in the auxiliary stress hole 1 and be filled with armored concrete, each aids in being equipped with stress hole 1 and is in upwards
The radial prestress anchorage cable 3 for stretching into rock mass.
Pour in the construction transportation hole 2 and be filled with armored concrete, be filled with the solid construction transportation of armored concrete
Bearing of the hole 2 for auxiliary stress hole 1.The construction transportation hole 2 is externally provided with the anchor pole 8 for stretching into rock mass, and construction transportation hole 2 is led
Draw.
The transverse section in the auxiliary stress hole 1 is arch.
The present embodiment also provides a kind of underground chamber, including main cavern 5, and the top of the main cavern 5 is tied for above-mentioned crown
Structure.
At the same time, the present embodiment also provides a kind of Cavity Construction method, comprises the steps：
a）Before 5 excavation construction of main cavern, in the rock mass that main 5 region both sides of cavern are excavated in design, hand over along longitudinal excavation construction
Logical hole 2.Construction transportation hole 2 is externally provided with the anchor pole 8 for stretching into rock mass, and construction transportation hole 2 is pulled.The length in construction transportation hole 2 is big
In or be equal to main cavern's length.
b）With the construction transportation hole of wherein side 2 as starting point, the construction transportation hole 2 of opposite side as terminal, be close to crown
Portion's upper surface laterally excavates auxiliary stress hole 1, and auxiliary stress hole 1 is longitudinally spaced to be provided with multiple, and connects with construction transportation hole 2
It is logical.Reinforcing bar or formed steel construction are laid in auxiliary stress hole 1, and whole auxiliary stress hole 1 are filled with concreting.
c）Radially construct upwards prestress anchorage cable 3 from auxiliary stress hole 1, until deeply aiding in above stress hole 1
It is in rock mass and fixed.
d）The pouring reinforcement concrete in the construction transportation hole 2, makes the construction transportation hole 2 of both sides form auxiliary stress hole 1
Bearing.
e）Carry out the excavation of main cavern 5, after excavating molding, aid in stress hole 1 with the top of main cavern 5 to be connected area segments straight
A part for cavern 5 based on being connected into.Afterwards, carry out 5 supporting construction of main cavern.
In above-mentioned steps method, the cross dimensions in stress hole 1 is aided according to its 5 span of load and main cavern born etc.
Condition is calculated and construction transportation needs comprehensive determination.
Embodiment 2
As shown in figs. 34, repeat embodiment 1, except that：For the super large of complex geologic conditions, wall rock condition extreme difference breaks
Mian Zhu caverns, are continuously arranged between adjacent auxiliary stress hole 1.
Exist in its construction method following different：
Step b）In continuously arrange between adjacent auxiliary stress hole 1, the auxiliary stress hole 1 of continuous arrangement using storehouse construction is jumped, most
Entirety closely is formed afterwards.
Claims (11)
1. a kind of underground cavern crown structure, including positioned at main cavern（5）The crown portion at top, it is characterised in that：It is additionally included in
Main cavern（5）The construction transportation hole dug along longitudinal direction in the rock mass of both sides（2）, be close to crown portion upper surface across arrange auxiliary
Stress hole（1）, the auxiliary stress hole（1）Along longitudinal direction is provided with multiple, and with construction transportation hole（2）Connection；
The auxiliary stress hole（1）Inside pour and be filled with armored concrete, each auxiliary stress hole（1）On be equipped with and stretch upwards
Enter the prestress anchorage cable of rock mass（3）.
2. underground cavern crown structure according to claim 1, it is characterised in that：The construction transportation hole（2）Inside pour
Armored concrete is filled with, the solid construction transportation hole of armored concrete is filled with（2）To aid in stress hole（1）Bearing；Institute
State construction transportation hole（2）The anchoring piece for stretching into rock mass is externally provided with, to construction transportation hole（2）Drawing.
3. underground cavern crown structure according to claim 1, it is characterised in that：The adjacent auxiliary stress hole（1）It
Between interval setting.
4. underground cavern crown structure according to claim 1, it is characterised in that：The adjacent auxiliary stress hole（1）It
Between continuously arrange.
5. underground cavern crown structure according to claim 1, it is characterised in that：The auxiliary stress hole（1）It is cross-section
Face is arch.
6. underground cavern crown structure according to claim 1, it is characterised in that：The prestress anchorage cable（3）It is in spoke
Penetrate shape arrangement.
7. a kind of underground chamber, including main cavern（5）, it is characterised in that：The main cavern（5）Top be the claims
Crown structure described in 1～6 any one.
8. a kind of Cavity Construction method, it is characterised in that comprise the steps：
a）In main cavern（5）Before excavation construction, main cavern is excavated in design（5）In the rock mass of region both sides, along longitudinal direction, excavation is applied
Work access tunnel（2）；
b）With the construction transportation hole of wherein side（2）For starting point, the construction transportation hole of opposite side（2）For terminal, it is close to crown
Portion's upper surface laterally excavates auxiliary stress hole（1）, auxiliary stress hole（1）Along longitudinal direction is provided with multiple, and with construction transportation hole（2）Even
It is logical；In auxiliary stress hole（1）Interior laying reinforcing bar or formed steel construction, and stress hole is aided in concreting filling is whole（1）；
c）From auxiliary stress hole（1）Construct upwards prestress anchorage cable（3）, until deeply aiding in stress hole（1）In the rock mass of top
And it is fixed；
e）Carry out main cavern（5）Excavation, after excavating molding, aid in stress hole（1）With main cavern（5）The linking area segments at top
It is directly becoming main cavern（5）A part；Afterwards, carry out main cavern（5）Supporting construction.
9. Cavity Construction method according to claim 8, it is characterised in that：In step c）Afterwards, step e）Before
It is additionally provided with step d）In construction transportation hole（2）Interior pouring reinforcement concrete, makes the construction transportation hole of both sides（2）Form auxiliary stress
Hole（1）Bearing；Then in construction transportation hole（2）The anchoring piece for stretching into rock mass is externally provided with, to construction transportation hole（2）Drawing.
10. Cavity Construction method according to claim 8, it is characterised in that：Step b）In adjacent auxiliary stress hole
（1）Between interval setting；
Step c）In each auxiliary stress hole（1）On prestress anchorage cable（3）Radially arrange.
11. underground cavern crown structures according to claim 8, it is characterised in that：Step b）In adjacent auxiliary stress hole
（1）Between continuously arrange, the auxiliary stress hole of continuous arrangement（1）Using storehouse construction is jumped, entirety closely is eventually formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710134481.9A CN106640118B (en) | 2017-03-08 | 2017-03-08 | A kind of underground cavern crown structure, underground chamber and Cavity Construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710134481.9A CN106640118B (en) | 2017-03-08 | 2017-03-08 | A kind of underground cavern crown structure, underground chamber and Cavity Construction method |
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| Publication Number | Publication Date |
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| CN106640118A true CN106640118A (en) | 2017-05-10 |
| CN106640118B CN106640118B (en) | 2019-02-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355233A (en) * | 2017-08-30 | 2017-11-17 | 中国电建集团中南勘测设计研究院有限公司 | A kind of underground chamber and Cavity Construction method |
| CN109404019A (en) * | 2018-12-25 | 2019-03-01 | 中国电建集团成都勘测设计研究院有限公司 | Surrounding rock of chamber pays protecting system and cavern's structure in advance |
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| CN103306682A (en) * | 2013-06-26 | 2013-09-18 | 中国水电顾问集团中南勘测设计研究院 | Long-span and high-side-wall underground space building and excavation support method thereof |
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| CN204646268U (en) * | 2015-05-26 | 2015-09-16 | 中国电建集团中南勘测设计研究院有限公司 | A kind of underground construction steel arch-shelf composite supporting construction |
| CN206722841U (en) * | 2017-03-08 | 2017-12-08 | 中国电建集团中南勘测设计研究院有限公司 | A kind of underground cavern crown structure and its underground chamber |
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2017
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| JPH11193689A (en) * | 1998-01-05 | 1999-07-21 | Shimizu Corp | Underground cavity construction method and underground cavity construction thereby |
| JP2000120398A (en) * | 1998-10-16 | 2000-04-25 | Daiho Constr Co Ltd | Construction method for tunnel having arc-shaped cross section and underground excavator |
| CN102226403A (en) * | 2011-03-30 | 2011-10-26 | 中铁一局集团有限公司 | Construction method of large-span subway station main body by using arched cover method and station main body structure |
| CN102536273A (en) * | 2012-03-30 | 2012-07-04 | 中建市政建设有限公司 | One-step forming construction method for 26m large-span space |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355233A (en) * | 2017-08-30 | 2017-11-17 | 中国电建集团中南勘测设计研究院有限公司 | A kind of underground chamber and Cavity Construction method |
| CN107355233B (en) * | 2017-08-30 | 2019-03-22 | 中国电建集团中南勘测设计研究院有限公司 | A kind of underground chamber and Cavity Construction method |
| CN109404019A (en) * | 2018-12-25 | 2019-03-01 | 中国电建集团成都勘测设计研究院有限公司 | Surrounding rock of chamber pays protecting system and cavern's structure in advance |
| CN109404019B (en) * | 2018-12-25 | 2024-02-27 | 中国电建集团成都勘测设计研究院有限公司 | Cave surrounding rock pre-supporting system and cave structure |
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| Publication number | Publication date |
|---|---|
| CN106640118B (en) | 2019-02-19 |
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