CN201738932U - Support structure of loess tunnel with extra-large cross-section - Google Patents
Support structure of loess tunnel with extra-large cross-section Download PDFInfo
- Publication number
- CN201738932U CN201738932U CN 201020286588 CN201020286588U CN201738932U CN 201738932 U CN201738932 U CN 201738932U CN 201020286588 CN201020286588 CN 201020286588 CN 201020286588 U CN201020286588 U CN 201020286588U CN 201738932 U CN201738932 U CN 201738932U
- Authority
- CN
- China
- Prior art keywords
- loess tunnel
- section
- tunnel
- large cross
- extra
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model relates to a support structure of a loess tunnel with an extra-large cross-section. Larger distortion or even collapse accidents happened easily in the construction process of the loess tunnel. At present, aiming at the loess tunnel with the large cross-section, a core soil short steps reservation method is successfully applied for digging the 140m2 loess tunnel with the large cross-section. A capacitor-resistor diode network (CRD) method is adopted to solve the construction of digging a new 120m2 loess tunnel of 25m burial depth under an existing railway. As the excavation cross-section of the loess tunnel is larger and larger, the construction is more and more difficult and dangerous. The utility model comprises a preliminary stage support, an arch wall secondary lining and an inverted arch. A small canal advance support is arranged along the outline line of the arch part of the tunnel and a waterproof layer is arranged between the preliminary stage support and the arch wall secondary lining. When effectively ensuring the construction safety of the loess tunnel with the extra-large cross-section, the utility model has the advantages of simple construction procedure, large excavation space, high tunnel construction speed, and facilitates the operation of large-scale machinery.
Description
Technical field
The utility model relates to tunnel-like, is specifically related to a kind of supporting and protection structure of extra-large cross-section loess tunnel.
Background technology
Moderate finite deformation even landslide accident easily take place in the loess tunnel construction process, and current, at large-section loess tunnel, successful Application is reserved the short benching tunnelling method of core soil and is solved excavation area 140m
2The construction of large-section loess tunnel, and adopt the CRD method to solve buried depth 25m, excavation area 120m
2New loess tunnel under wear existing railway construction.Along with the further increasing of loess tunnel excavated section, it is big that its difficulty of construction and risk also progressively become.Though side heading method can be controlled sedimentation effectively, but construction step preface is various, construction space is narrow and small, construction speed is slow, construction costs is higher, especially at long distance, extra-large cross-section loess tunnel group's construction, safe, quick, economic construction be realized, suitable supporting and protection structure measure and reasonable excavation method must be adopted.
The utility model content
The technical problem that the utility model solved provide a kind of simple in structure, effectively guarantee the supporting and protection structure and the job practices thereof of extra-large cross-section loess tunnel construction safety.
For solving above-mentioned technical problem, the technical scheme that the utility model is taked:
The utility model comprises preliminary bracing, arch wall secondary lining, inverted arch, and its special character is: the outline line along the arch, tunnel is provided with the ductule advance support, is provided with waterproofing course between preliminary bracing and the arch wall secondary lining.
Above-mentioned preliminary bracing by the upright profile steel frame of sprayed mortar, frame, set anchor pole and hang steel mesh reinforcement and constitute.
The inverted arch of above-mentioned preliminary bracing partly comprises sprayed mortar and the upright profile steel frame of frame.
Above-mentioned waterproofing course is made of nonwoven and splash guard.
Compared with prior art, the beneficial effects of the utility model:
The utility model is when effectively guaranteeing the extra-large cross-section loess tunnel construction safety, and its working procedure is simple, and the excavation space is big, is convenient to the big machinery operation, and Tunnel Construction Schedule is fast.
Description of drawings
Fig. 1 is a structure cross-sectional drawing of the present utility model;
Fig. 2 is a working procedure cross-sectional drawing of the present utility model;
Fig. 3 is a working procedure longitudinal plan of the present utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Referring to Fig. 1, the utility model comprises preliminary bracing 2, arch wall secondary lining 3, inverted arch 4, is provided with ductule advance support 1 along the outline line of arch, tunnel, is provided with waterproofing course between preliminary bracing 2 and the arch wall secondary lining 3.
Preliminary bracing 2 by the upright profile steel frame of sprayed mortar, frame, set anchor pole and hang steel mesh reinforcement and constitute.
The inverted arch of preliminary bracing 2 partly comprises sprayed mortar and the upright profile steel frame of frame.
Waterproofing course is made of nonwoven and splash guard.
Referring to Fig. 2,3, the step of implementing job practices of the present utility model is:
(1), along arch, tunnel excavation outline line, perform ductule advance support 1;
(2), 5 the excavation and stay core soil of under ductule advance support 1 protection, topping bar, excavate drilling depth is a Pin steelframe distance at every turn, performs the part of topping bar of preliminary bracing 2 then;
(3), excavation central core soil 6;
(4), step 7 and right side get out of a predicament or an embarrassing situation 10 in the staggered excavation left side, each excavation is controlled at 1～2 Pin profile steel frame distance, performs the middle step left side of preliminary bracing 2 and the right side part of getting out of a predicament or an embarrassing situation then;
(5), step 8 and left side get out of a predicament or an embarrassing situation 9 in the staggered excavation right side, each excavation is controlled at 1～2 Pin profile steel frame distance, performs the middle step right side of preliminary bracing 2 and the left part of getting out of a predicament or an embarrassing situation then;
(6), carry out the excavation of the inverted arch part soil body 11, excavate 5 Pin steelframe distances at every turn, perform the inverted arch part of preliminary bracing 2 then, immediately following performing inverted arch 4;
(7), perform the waterproofing course of 3 of preliminary bracing 2 and arch wall secondary linings, carry out the lining cutting reinforcing bar binding then;
(8), cast arch wall secondary lining 3.
Claims (4)
1. the supporting and protection structure of an extra-large cross-section loess tunnel, comprise preliminary bracing (2), arch wall secondary lining (3), inverted arch (4), it is characterized in that: the outline line along the arch, tunnel is provided with ductule advance support (1), is provided with waterproofing course between preliminary bracing (2) and the arch wall secondary lining (3).
2. the supporting and protection structure of a kind of extra-large cross-section loess tunnel according to claim 1 is characterized in that: described preliminary bracing (2) by sprayed mortar, the upright profile steel frame of frame, set anchor pole and hang steel mesh reinforcement and constitute.
3. the supporting and protection structure of a kind of extra-large cross-section loess tunnel according to claim 1 and 2 is characterized in that: described preliminary bracing (2) inverted arch partly comprises sprayed mortar and the upright profile steel frame of frame.
4. the supporting and protection structure of a kind of extra-large cross-section loess tunnel according to claim 3, it is characterized in that: described waterproofing course is made of nonwoven and splash guard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020286588 CN201738932U (en) | 2010-08-09 | 2010-08-09 | Support structure of loess tunnel with extra-large cross-section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020286588 CN201738932U (en) | 2010-08-09 | 2010-08-09 | Support structure of loess tunnel with extra-large cross-section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201738932U true CN201738932U (en) | 2011-02-09 |
Family
ID=43554210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020286588 Expired - Fee Related CN201738932U (en) | 2010-08-09 | 2010-08-09 | Support structure of loess tunnel with extra-large cross-section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201738932U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906974A (en) * | 2010-08-09 | 2010-12-08 | 中铁第一勘察设计院集团有限公司 | Supporting structure of extra-large cross-section loess tunnel and construction method thereof |
| CN102213099A (en) * | 2011-05-23 | 2011-10-12 | 中铁二院工程集团有限责任公司 | Composite liner structure of four-track large-span wall-foundation arched tunnel |
| CN102268993A (en) * | 2011-06-30 | 2011-12-07 | 广东省长大公路工程有限公司 | Method for excavating tunnel in high liquid limit soil |
| CN103670427A (en) * | 2013-12-24 | 2014-03-26 | 中铁十九局集团第三工程有限公司 | Cross excavation support late-dismantling type tunnel construction method |
| CN105863681A (en) * | 2016-06-27 | 2016-08-17 | 西北大学 | Quick protecting method for sloughing and sand sliding of roof of excavated sandy loess tunnel |
| CN107035383A (en) * | 2017-04-26 | 2017-08-11 | 中铁第勘察设计院集团有限公司 | The supporting construction of extra-large cross-section loess tunnel and its excavation method |
| CN107849917A (en) * | 2015-11-25 | 2018-03-27 | Hyun工程建设株式会社 | Utilize the method for tunnel construction and the device suitable for it of advance support and Lagging support |
-
2010
- 2010-08-09 CN CN 201020286588 patent/CN201738932U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906974A (en) * | 2010-08-09 | 2010-12-08 | 中铁第一勘察设计院集团有限公司 | Supporting structure of extra-large cross-section loess tunnel and construction method thereof |
| CN102213099A (en) * | 2011-05-23 | 2011-10-12 | 中铁二院工程集团有限责任公司 | Composite liner structure of four-track large-span wall-foundation arched tunnel |
| CN102268993A (en) * | 2011-06-30 | 2011-12-07 | 广东省长大公路工程有限公司 | Method for excavating tunnel in high liquid limit soil |
| CN102268993B (en) * | 2011-06-30 | 2013-10-23 | 广东省长大公路工程有限公司 | Method for excavating tunnel in high liquid limit soil |
| CN103670427A (en) * | 2013-12-24 | 2014-03-26 | 中铁十九局集团第三工程有限公司 | Cross excavation support late-dismantling type tunnel construction method |
| CN107849917A (en) * | 2015-11-25 | 2018-03-27 | Hyun工程建设株式会社 | Utilize the method for tunnel construction and the device suitable for it of advance support and Lagging support |
| CN105863681A (en) * | 2016-06-27 | 2016-08-17 | 西北大学 | Quick protecting method for sloughing and sand sliding of roof of excavated sandy loess tunnel |
| CN107035383A (en) * | 2017-04-26 | 2017-08-11 | 中铁第勘察设计院集团有限公司 | The supporting construction of extra-large cross-section loess tunnel and its excavation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101906974A (en) | Supporting structure of extra-large cross-section loess tunnel and construction method thereof | |
| CN201738932U (en) | Support structure of loess tunnel with extra-large cross-section | |
| CN201786361U (en) | Supporting structure for railway crossing under loess tunnel with extra-large section | |
| CN101906975A (en) | Supporting structure for extra-large cross-section loess tunnel underpass railway and construction method thereof | |
| CN104612698B (en) | A kind of shallow-depth-excavation tunnel top bar interval wall construction method | |
| CN106761778B (en) | A kind of underground digging in subway station construction technology suitable for upper-soft lower-hard ground | |
| CN202560245U (en) | Multifunctional trolley with freely retractable arms | |
| CN102606167B (en) | Settlement control construction method for transverse grouting guide pipe of shallow underground excavation tunnel | |
| CN103046933B (en) | Shield station-crossing tunneling and station parallel construction method | |
| CN101781991B (en) | Double-well type reinforcement method of shield arrival or starting end and double-well type shield arrival method | |
| CN101539021B (en) | Road tunnel excavation method | |
| CN102953737B (en) | Construction method for inverted arch of VI-level water-enriched surrounding rock tunnel | |
| CN104480868B (en) | On tear beam method open across the highway bridge of railway in operation | |
| CN101886390B (en) | All casing static pressure pile pulling technology in narrow space | |
| CN104452809A (en) | Ultra-shallow buried tunnel cover-excavation construction method | |
| CN106979021B (en) | Large-section loess tunnel excavates and preliminary bracing quick closure cyclization method | |
| CN107035383A (en) | The supporting construction of extra-large cross-section loess tunnel and its excavation method | |
| CN205503146U (en) | Novel supporting construction of shallow tunnel suitable for city sensitizing range | |
| CN102606168B (en) | Construction method for preventing settlement and deformation of shallow-buried-excavation tunnel in excavation | |
| CN107905814B (en) | Large span loess tunnel top bar CD construction method | |
| CN102817621B (en) | Comprehensive construction method applicable to controlling arch basement sedimentation for tunnel in unfavorable geological conditions | |
| CN204898672U (en) | Discard device of pulling out of pile foundation | |
| CN205805574U (en) | A kind of super-span pile foundation joist carrying arch tunnel recombination liner structure | |
| CN204436407U (en) | The structure that the pre-Geological disaster prevention of the double-deck preliminary bracing of a kind of big cross section Support System in Soft Rock Tunnels occurs | |
| CN100464035C (en) | Metro engineering pile foundation underpinning construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20180809 |