CN114109449B - Large-span underground cavern dome supporting structure - Google Patents
Large-span underground cavern dome supporting structure Download PDFInfo
- Publication number
- CN114109449B CN114109449B CN202111388324.3A CN202111388324A CN114109449B CN 114109449 B CN114109449 B CN 114109449B CN 202111388324 A CN202111388324 A CN 202111388324A CN 114109449 B CN114109449 B CN 114109449B
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- China
- Prior art keywords
- arch rib
- dome
- ring beam
- supporting structure
- arch
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
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- 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
Abstract
The invention relates to the field of building structures, in particular to an underground cavity dome supporting structure; the invention aims to solve the technical problem of providing a long-span underground cavern dome supporting structure with better structural integrity and higher safety and reliability. The long-span underground cavern dome supporting structure comprises a ring beam and arch ribs, wherein two ends of each arch rib are connected with the upper surface of the ring beam, the center point of the intersection of each arch rib is arranged on the axis of the ring beam, and the projection of each arch rib on a horizontal plane is in a Chinese character 'mi' -shape projection.
Description
Technical Field
The invention relates to the field of building structures, in particular to an underground cavity dome supporting structure.
Background
The cylindrical pressure regulating well of the hydraulic and hydroelectric engineering generally adopts a dome structure, the diameter of the dome structure is generally larger than 15m, and the dome span of the largest cylindrical pressure regulating well in China reaches 48m. Underground oil storage engineering is generally formed by connecting a channel with the length of 1000m in series with a plurality of oil tank chambers, and the dome span of each oil tank chamber is generally 15-25 m according to different capacities.
The hydraulic and hydroelectric engineering cylindrical pressure regulating well dome or the underground oil storage engineering oil tank chamber dome has the characteristics of large burial depth, large span and complex geological conditions of the occurrence engineering. In particular, underground oil works distribute a plurality of oil tank chambers in a range up to 1000m, and it is difficult for earlier surveys to fully ascertain the geological conditions of the underground works in such a wide range. The traditional dome supporting structure is a system anchor spraying supporting structure, the dome is excavated while being supported in the process of excavating, and the supporting structure and the construction method have the following two problems: 1. because the dome span is large, the dome must be excavated in a slicing way, so the supporting can be only carried out in a slicing way, the arch effect of the dome surrounding rock cannot be fully utilized, and the integrity of the supporting structure is poor; 2. in the process of the segmented excavation, the supporting system belongs to a unidirectional stress structure, and when a fault which is not explored in the earlier stage and is consistent with the trend of an excavated side wall is encountered, the side wall is extremely easy to collapse so as to influence the stability of the top arch.
Disclosure of Invention
The invention aims to solve the technical problem of providing a long-span underground cavern dome supporting structure with better structural integrity and higher safety and reliability.
The technical scheme adopted for solving the technical problems is as follows: the long-span underground cavern dome supporting structure comprises a ring beam and arch ribs, wherein two ends of each arch rib are connected with the upper surface of the ring beam, the center point of the intersection of each arch rib is arranged on the axis of the ring beam, and the projection of each arch rib on a horizontal plane is in a Chinese character 'mi' -shape projection.
Further, the ring beam anchor rod is connected with the ring beam.
Further, still include system's stock, hang net reinforcing bar, just spout concrete layer and spout the concrete layer again, system's stock, hang net reinforcing bar, just spout the concrete layer and spout the concrete layer again and set up between the arch rib.
Further, the width of the arch rib is 150cm, and the thickness of the arch rib is 45cm.
Further, the thickness of the ring beam is 100cm, and the width of the ring beam is 80cm.
Further, the projected outer diameter of the ring beam on the ground is twice the radius of the arch rib.
Further, the included angle between the axes of projection of the ribs on the horizontal plane is 45 degrees.
The beneficial effects of the invention are as follows: compared with the existing dome supporting structure, the ring beam disclosed by the invention has the advantages that the size is only small, the required pilot tunnel section is small, the construction is convenient, the collapse is not easy, the ring beam is formed before the upper part of the dome is excavated, the compressive strength of concrete can be fully utilized, the convergence deformation of surrounding rocks is supported, the ring beam and the 'rice' -shaped arch rib form a hemispherical supporting structure before the dome is excavated in a large area, the structure is uniformly stressed and can bear the deformation of the surrounding rocks in all directions, the hemispherical supporting structure can adapt to faults in any direction, the dome is excavated in a segmented mode after the ring beam and the 'rice' -shaped arch rib are formed, the dome is divided into 8 blocks, the dome excavation span is effectively reduced, the stability of the dome surrounding rocks is facilitated, the integrity of the supporting system is improved, the 'arch effect' of the dome surrounding rocks can be fully utilized by the supporting structure, the complex or unknown geological conditions are adapted, and the safety is better.
Drawings
FIG. 1 is a top plan view of the structure of the present invention;
FIG. 2 is a cross-sectional view of the present invention taken along the direction of the C30 reinforced concrete rib spray;
FIG. 3 is a cross-sectional view of the present invention taken along the extent of the system's anchor jet support;
FIG. 4 is a typical cross section of a C30 sprayed reinforced concrete rib
Parts, parts and numbers in the figures: the concrete pile comprises a ring beam 1, ring beam anchor rods 2, arch ribs 3, a primary spraying concrete layer 4, net hanging steel bars 5, system anchor rods 6 and a secondary spraying concrete layer 7.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the large-span underground cavity dome supporting structure comprises a ring beam 1 and an arch rib 3, wherein two ends of the arch rib 3 are connected with the upper surface of the ring beam 1, the central point of the intersection of the arch rib 3 is on the axis of the ring beam 1, the projection of the arch rib 3 on the horizontal plane is a Chinese character 'mi' shaped projection, the construction method specifically comprises the steps of excavating a construction pilot tunnel along a dome arch foot circle, pouring the ring beam 1 of the dome arch foot in the heading process of the pilot tunnel, constructing a C30 reinforced concrete arch rib horizontally from the side wall of the annular pilot tunnel until the arch rib 3 is formed, then constructing another arch rib 3 vertical to the arch rib 3, and then constructing the arch rib 3 at an intersection angle of 45 degrees with the arch rib.
In order to enable the ring beam 1 to be connected with the rock soil firmly, the ring beam is further provided with a ring beam anchor rod 2, the ring beam anchor rod 2 is connected with the ring beam 1, and the ring beam anchor rod 2 is used for fixedly connecting the ring beam 1 with the rock soil so that the ring beam 1 is connected firmly.
In order to form a more complete hemispherical supporting structure so as to bear surrounding rock deformation in all directions, the invention also comprises a system anchor rod 6, a net hanging steel bar 5, a primary spraying concrete layer 4 and a secondary spraying concrete layer 7, wherein the system anchor rod 6, the net hanging steel bar 5, the primary spraying concrete layer 4 and the secondary spraying concrete layer 7 are arranged between the arch ribs 3, and the concrete construction method is that after the ring beam 1 and the 'rice' -shaped arch ribs 3 are formed, a top arch in the range of 45-degree intersection angle arch ribs 3 is excavated in a framing manner, concrete spraying, net hanging steel bar and supporting of the system anchor rod are carried out while excavating, and excavating diagonal angles are carried out until the whole dome excavation supporting is completed.
Given a specific construction dimension, the width of the rib 3 is 150cm, the thickness of the rib 3 is 45cm, the thickness of the ring beam 1 is 100cm, the width of the ring beam 1 is 80cm, and the projected outer diameter of the ring beam 1 on the ground is twice the radius of the rib 3.
In order to make the stress of each rib 3 uniform, the angle between the axes of projection of the rib 3 on the horizontal plane is 45 degrees.
Claims (7)
1. Large-span underground cavern dome supporting construction, its characterized in that: including circle roof beam (1) and arch rib (3), the both ends of arch rib (3) all are connected with the upper surface of circle roof beam (1), and the central point of arch rib (3) intersection is on the axis of circle roof beam (1), and the projection of arch rib (3) on the horizontal plane is the rice font projection, the long-span underground cavern dome supporting construction is obtained by following construction method: and excavating a construction pilot tunnel along the dome arch foot, pouring a ring beam (1) in the pilot tunnel tunneling process, constructing a horizontal roadway from the side wall of the annular pilot tunnel, spraying C30 reinforced concrete until an arch rib (3) is formed, then constructing another arch rib (3) perpendicular to the arch rib (3), constructing another arch rib (3) at an angle of 45 degrees with the arch rib (3), excavating a top arch in the range of the 45-degree intersection arch rib (3) in a framing manner after the ring beam (1) and the 'rice' -shaped arch rib (3) are formed, carrying out shotcrete, net hanging steel bars (5) and supporting of a system anchor rod (6) while excavating, and excavating opposite angles until the whole dome excavation supporting is completed.
2. The large span underground cavern dome supporting structure of claim 1, wherein: the ring beam anchor rod (2) is further included, and the ring beam anchor rod (2) is connected with the ring beam (1).
3. The large span underground cavern dome supporting structure of claim 1, wherein: still including just spraying concrete layer (4) and spraying concrete layer (7) once more, system stock (6), string net reinforcing bar (5), just spraying concrete layer (4) and spraying concrete layer (7) once more set up between arch rib (3).
4. A long span underground cavern dome supporting structure according to any one of claims 1 to 3 wherein: the width of the arch rib (3) is 150cm, and the thickness of the arch rib (3) is 45cm.
5. The large span underground cavern dome supporting structure of claim 4, wherein: the thickness of the ring beam (1) is 100cm, and the width of the ring beam (1) is 80cm.
6. The large span underground cavern dome supporting structure of claim 4, wherein: the projected outer diameter of the ring beam (1) on the ground is twice the radius of the arch rib (3).
7. The large span underground cavern dome supporting structure of claim 4, wherein: the included angle between the axes of projection of the arch ribs (3) on the horizontal plane is 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111388324.3A CN114109449B (en) | 2021-11-22 | 2021-11-22 | Large-span underground cavern dome supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111388324.3A CN114109449B (en) | 2021-11-22 | 2021-11-22 | Large-span underground cavern dome supporting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114109449A CN114109449A (en) | 2022-03-01 |
| CN114109449B true CN114109449B (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111388324.3A Active CN114109449B (en) | 2021-11-22 | 2021-11-22 | Large-span underground cavern dome supporting structure |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05179899A (en) * | 1991-12-26 | 1993-07-20 | Okumura Corp | Construction method of underground cavity |
| JPH10183767A (en) * | 1996-12-25 | 1998-07-14 | Mitsubishi Heavy Ind Ltd | Dome roof structure |
| JP2000073385A (en) * | 1998-08-28 | 2000-03-07 | Kumagai Gumi Co Ltd | Execution method for underground tank |
| CN103174429A (en) * | 2013-03-01 | 2013-06-26 | 河海大学 | Underground cavity extra-large dome excavating construction method |
| CN104806252A (en) * | 2015-04-28 | 2015-07-29 | 中铁工程设计咨询集团有限公司 | Underground dome excavation construction arrangement structure and excavation method |
| CN105201532A (en) * | 2015-09-11 | 2015-12-30 | 中铁九局集团第二工程有限公司 | Ring excavation construction method for underground large-span spherical-cap-shaped dome under weak surrounding rock |
| JP6063086B1 (en) * | 2016-08-08 | 2017-01-18 | 犬飼 八重子 | Method for constructing dome-like structure with straight members |
| CN107130977A (en) * | 2017-06-27 | 2017-09-05 | 长江勘测规划设计研究有限责任公司 | Super-span dome hollow be oriented in underground nuclear reactor cavern excavates structure and excavation method |
| CN110159323A (en) * | 2019-05-09 | 2019-08-23 | 中国葛洲坝集团第一工程有限公司 | The construction method fixed with steel arch-shelf is excavated suitable for extra-large cross-section underground chamber |
| CN112983508A (en) * | 2021-04-20 | 2021-06-18 | 西安世纪金属结构有限公司 | Corrugated steel underground chamber structure |
| CN113586079A (en) * | 2021-08-24 | 2021-11-02 | 中国电建集团中南勘测设计研究院有限公司 | Tunnel crossroad structure and construction method thereof |
-
2021
- 2021-11-22 CN CN202111388324.3A patent/CN114109449B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05179899A (en) * | 1991-12-26 | 1993-07-20 | Okumura Corp | Construction method of underground cavity |
| JPH10183767A (en) * | 1996-12-25 | 1998-07-14 | Mitsubishi Heavy Ind Ltd | Dome roof structure |
| JP2000073385A (en) * | 1998-08-28 | 2000-03-07 | Kumagai Gumi Co Ltd | Execution method for underground tank |
| CN103174429A (en) * | 2013-03-01 | 2013-06-26 | 河海大学 | Underground cavity extra-large dome excavating construction method |
| CN104806252A (en) * | 2015-04-28 | 2015-07-29 | 中铁工程设计咨询集团有限公司 | Underground dome excavation construction arrangement structure and excavation method |
| CN105201532A (en) * | 2015-09-11 | 2015-12-30 | 中铁九局集团第二工程有限公司 | Ring excavation construction method for underground large-span spherical-cap-shaped dome under weak surrounding rock |
| JP6063086B1 (en) * | 2016-08-08 | 2017-01-18 | 犬飼 八重子 | Method for constructing dome-like structure with straight members |
| CN107130977A (en) * | 2017-06-27 | 2017-09-05 | 长江勘测规划设计研究有限责任公司 | Super-span dome hollow be oriented in underground nuclear reactor cavern excavates structure and excavation method |
| CN110159323A (en) * | 2019-05-09 | 2019-08-23 | 中国葛洲坝集团第一工程有限公司 | The construction method fixed with steel arch-shelf is excavated suitable for extra-large cross-section underground chamber |
| CN112983508A (en) * | 2021-04-20 | 2021-06-18 | 西安世纪金属结构有限公司 | Corrugated steel underground chamber structure |
| CN113586079A (en) * | 2021-08-24 | 2021-11-02 | 中国电建集团中南勘测设计研究院有限公司 | Tunnel crossroad structure and construction method thereof |
Non-Patent Citations (1)
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| 欧先进，陈清波.太平驿水电站调压室穹顶支护设计.四川水力发电.1994,(03),全文. * |
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| CN114109449A (en) | 2022-03-01 |
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