CN112096417A - Underground excavation arch cover method interface structure and construction method thereof - Google Patents
Underground excavation arch cover method interface structure and construction method thereof Download PDFInfo
- Publication number
- CN112096417A CN112096417A CN202011060649.4A CN202011060649A CN112096417A CN 112096417 A CN112096417 A CN 112096417A CN 202011060649 A CN202011060649 A CN 202011060649A CN 112096417 A CN112096417 A CN 112096417A
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- CN
- China
- Prior art keywords
- interface
- arch
- air duct
- arch cover
- main
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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
- E21D11/04—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
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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
- E21D11/28—Longitudinal struts, i.e. longitudinal connections between adjoining arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
Abstract
The invention relates to an underground excavation arch cover method interface structure and a construction method thereof. The invention changes the air duct close to the main body part into the construction of the arch cover method, can facilitate the on-site construction organization, can finish the second lining construction of the main body earlier, effectively solves the risks and difficulties existing in the structural construction of the traditional interface part, improves the safety and the reliability of the engineering, and has higher economic benefit and social benefit.
Description
Technical Field
The invention belongs to the technical field of tunnel engineering construction, and particularly relates to an underground excavation arch cover method interface structure and a construction method thereof.
Background
For a shallow-buried underground excavation method station with a soft upper stratum and a hard lower stratum, an arch cover method is a relatively perfect construction method and construction process, but meanwhile, the construction of the arch cover method requires that excavation is finished on the upper half section (arch part) of the station, the lower step of the station is excavated after secondary lining construction, and the construction cannot be carried out due to the fact that an air duct interface is free of arch foot beams and the two linings are single-sided in suspension.
Disclosure of Invention
The invention aims to provide an underground excavation and arch cover method interface structure and a construction method thereof. The technical problem existing in the traditional scheme is solved, and the interface form of the arch cover method is optimized.
The technical scheme adopted by the invention is as follows:
undercut arch cover method interface structure, its characterized in that:
the interface structure is positioned at the interface of the main structure of the station and the air channel structure and comprises an arch cover at the top, and the main structure expansion section is constructed by constructing the arch cover and transversely connecting the arch cover into the air channel structure.
And an arched cover joist is arranged at the joint of the air duct structure.
The interface of the air duct structure is contracted inwards, and the arched cover joist is positioned at the outer side of the contracted part.
The main structure expansion section is a part of the main structure standard section in the station main structure, which transversely expands outwards and is positioned at the interface of the station main structure and the air duct structure.
And arch cover joists are arranged below arch feet at two ends of the air duct structure, the joists are of a steel frame concrete structure and are fixed by 2 locking anchor rods with the length of 6 m.
The construction method of the underground excavation arch cover method interface structure is characterized in that:
the method comprises the following steps:
the method comprises the following steps: finishing the second lining construction of the standard section of the main body structure, and constructing a second lining at the interface of the air duct and the main body after the design strength is reached; simultaneously manufacturing the main structure expansion section and the vault two linings of the air duct, and removing the mold after the two linings reach the design strength;
step two: excavating a lower soil body under the protection of the arch cover; constructing an expansion section of the main structure and an inverted arch and a side wall of the air duct in sequence, and constructing two end walls of the main structure finally;
step three: and constructing an internal structure of the air duct.
The invention has the following advantages:
the section of the expanded section of the main structure of the station is large in size and complex in stress, in order to accelerate the construction progress, the air duct close to the main part is constructed by the arch cover method, the on-site construction organization can be facilitated, the second lining construction of the main body can be completed earlier, the risks and difficulties existing in the construction of the traditional interface part structure are effectively solved, the safety and reliability of the engineering are improved, and the high economic benefit and the high social benefit are achieved.
Drawings
FIG. 1 is a plan view of the interface structure of the main body and the air duct.
FIG. 2 is a longitudinal cross-sectional view of the interface structure between the main body and the air duct.
FIG. 3 is a cross-sectional view of the interface structure of the main body and the air duct.
In the figure, 1-a main structure standard section, 2-a main structure expanding section, 3-an air duct structure, 4-an arch cover joist, 5-an arch cover and 6-a station end wall.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
The invention relates to an underground excavation arch cover method interface structure, which is positioned at the interface of a station main body structure and an air channel structure 3 and comprises an arch cover 5 at the top, wherein a main body structure expansion section 2 is arranged below the arch cover 5 and transversely connected into the air channel structure 3.
An arch cover joist 4 is arranged at the interface of the air duct structure 3. The interface of the air duct structure 3 is contracted inwards, and the arched cover joist 4 is positioned at the outer side of the contracted part.
The main structure expanding section 2 is a part of the main structure standard section 1 in the station main structure, which transversely expands outwards and is positioned at the interface of the station main structure and the air duct structure 3.
And arch cover joists 4 are arranged below arch feet at two ends of the air duct structure 3, and the joists 4 are of a steel frame concrete structure and are fixed by 2 locking anchor rods with the length of 6 m.
The construction method of the underground excavation arch cover method interface structure comprises the following construction steps of arch excavation → vault lining → excavation of lower earthwork → inverted arch lining → side wall lining → headwall lining:
the method comprises the following steps: finishing the second lining construction of the main body structure standard section 1, and constructing a second lining at the interface of the air duct and the main body after the design strength is reached; simultaneously manufacturing the main structure expanding section 2 and the second vault lining 3 of the air duct, and removing the mold after the second vault lining reaches the design strength;
step two: excavating a lower soil body under the protection of the arch cover 5; constructing the main structure expansion section 2 and the inverted arch and the side wall of the air duct in sequence, and constructing two end walls 6 of the main structure finally;
step three: and constructing an internal structure of the air duct.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (6)
1. Undercut arch cover method interface structure, its characterized in that:
the interface structure is positioned at the interface of the station main body structure and the air channel structure (3) and comprises an arch cover (5) at the top, and the main body structure expansion section (2) is constructed by applying the arch cover (5) and transversely connected into the air channel structure (3).
2. The undermining arch-style interface structure of claim 1, wherein:
an arch cover joist (4) is arranged at the interface of the air duct structure (3).
3. The undermining arch-style interface structure of claim 2, wherein:
the interface of the air duct structure (3) is contracted inwards, and the arched cover joist (4) is positioned at the outer side of the contracted part.
4. The undermining cove interface structure of claim 3, wherein:
the main structure expanding section (2) is a part of the main structure standard section (1) in the main structure of the station, which transversely expands outwards and is positioned at the interface of the main structure of the station and the air duct structure (3).
5. The undercut arch-type interface structure of claim 4, wherein:
and arch cover joists (4) are arranged below arch feet at two ends of the air duct structure (3), the joists (4) are of a steel frame concrete structure and are fixed by 2 locking anchor rods with the length of 6 m.
6. The construction method of the underground excavation arch cover method interface structure is characterized in that:
the method comprises the following steps:
the method comprises the following steps: finishing the second lining construction of the main body structure standard section (1), and constructing a second lining at the interface of the air duct and the main body after the design strength is reached; simultaneously manufacturing the main structure expanding section (2) and the second vault lining (3) of the air duct, and removing the mold after the second vault lining reaches the design strength;
step two: excavating a lower soil body under the protection of the arch cover (5); sequentially constructing an expansion section (2) of the main structure, an inverted arch and a side wall of the air duct, and finally constructing two end walls (6) of the main structure;
step three: and constructing an internal structure of the air duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011060649.4A CN112096417A (en) | 2020-09-30 | 2020-09-30 | Underground excavation arch cover method interface structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011060649.4A CN112096417A (en) | 2020-09-30 | 2020-09-30 | Underground excavation arch cover method interface structure and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112096417A true CN112096417A (en) | 2020-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011060649.4A Pending CN112096417A (en) | 2020-09-30 | 2020-09-30 | Underground excavation arch cover method interface structure and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610225A (en) * | 2021-01-14 | 2021-04-06 | 中铁工程设计咨询集团有限公司 | Semi-amplitude jacking main body device for large-span air duct of underground excavation station and construction method thereof |
| CN113236296A (en) * | 2021-04-25 | 2021-08-10 | 中铁二局第二工程有限公司 | Arch pier body preservation method for subway station arch cover construction |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298501A (en) * | 2015-11-11 | 2016-02-03 | 上海市城市建设设计研究总院 | Construction method for auxiliary air duct structure of underground excavation station |
| CN110486036A (en) * | 2019-08-26 | 2019-11-22 | 中建隧道建设有限公司 | A kind of first branch ledge method construction method of expansion arch springing |
-
2020
- 2020-09-30 CN CN202011060649.4A patent/CN112096417A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298501A (en) * | 2015-11-11 | 2016-02-03 | 上海市城市建设设计研究总院 | Construction method for auxiliary air duct structure of underground excavation station |
| CN110486036A (en) * | 2019-08-26 | 2019-11-22 | 中建隧道建设有限公司 | A kind of first branch ledge method construction method of expansion arch springing |
Non-Patent Citations (2)
| Title |
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| 李赵九: "拱盖法暗挖地铁车站主体与附属结构支护体系转换施工技术研究", 《现代隧道技术》 * |
| 王渭明等: "基于结构先行的浅埋碎裂岩体暗挖地铁隧道交叉点施工方案研究与应用", 《现代隧道技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610225A (en) * | 2021-01-14 | 2021-04-06 | 中铁工程设计咨询集团有限公司 | Semi-amplitude jacking main body device for large-span air duct of underground excavation station and construction method thereof |
| CN113236296A (en) * | 2021-04-25 | 2021-08-10 | 中铁二局第二工程有限公司 | Arch pier body preservation method for subway station arch cover construction |
| CN113236296B (en) * | 2021-04-25 | 2023-08-18 | 中铁二局第二工程有限公司 | Arch leg rock mass preservation method for subway station arch cover method construction |
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Application publication date: 20201218 |
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