CN202544866U - Advance support device for pipe shed of large-span metro tunnel portal - Google Patents
Advance support device for pipe shed of large-span metro tunnel portal Download PDFInfo
- Publication number
- CN202544866U CN202544866U CN2011205469898U CN201120546989U CN202544866U CN 202544866 U CN202544866 U CN 202544866U CN 2011205469898 U CN2011205469898 U CN 2011205469898U CN 201120546989 U CN201120546989 U CN 201120546989U CN 202544866 U CN202544866 U CN 202544866U
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- pipe
- support device
- steel pipe
- tunnel
- pipe shed
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Abstract
The utility model provides an advance support device for a pipe shed of a large-span metro tunnel portal, and solves the problems that a large steel pipe of the conventional pipe shed advance support device is difficult to control, and the pipe shed is limited in the slurry injection reinforcement range. The advance support device comprises a tunnel face (1), wherein cambered I-shaped steel (2) is arranged above the tunnel face (1) along a digging cambered line; orifice bushings (5) are arranged on the top of the cambered I-shaped steel (2) at equal intervals; a large-aperture steel pipe (4) is arranged in each orifice bushing (5); a fixing rib (6) is welded between the side wall of each large-aperture steel pipe (4) and each orifice bushing (5); the large-aperture steel pipes (4) are upwards inclined by 1 to 3 degrees along a tunnel digging direction; and slurry injection holes are formed in the large-aperture steel pipes (4). By the advance support device, a large pipe shed advance slurry injection support reinforcement technology is applied to a shallow buried section at an entrance or an exit of a metro station, and an I-shaped steel arch frame reinforces the support, so that good conditions are created for safe and successful construction of a tunnel body.
Description
Technical field
The utility model relates to a kind of advanced stand device of constructing tunnel, and particularly a kind of large span subway advances portal pipe canopy advanced stand device.
Background technology
Carry out subway in unfavorable geology locations such as weak surrounding rock, fault belt and advance portal when construction, for guarantee construction safety, stable, carry out apace, generally adopt bassoon canopy technology to carry out advance support.Particularly the station vault construction is in the strong weathered granite; And during the overlying strata thinner thickness; Control ground settlement near stable the reaching of face guaranteeing just to advance the station portal, existing pipe canopy advanced stand device exists big steel pipe Position Control difficulty and the limited problem of tube shed grouting reinforcing scope.
Summary of the invention
The utility model provides a kind of large span subway to advance portal pipe canopy advanced stand device, has solved existing pipe canopy advanced stand device and has had big steel pipe Position Control difficulty and the limited problem of tube shed grouting reinforcing scope.
The utility model solves above technical problem through following technical scheme:
The large span subway advances portal pipe canopy advanced stand device; Comprise face, above face, be provided with the arc i iron along the excavation curved line, the end face of arc i iron is provided with equally spaced orifice sleeve; In each orifice sleeve, be provided with large-diameter steel pipe; Between the sidewall of large-diameter steel pipe and orifice sleeve, be welded with fixing ribs, described large-diameter steel pipe is along the tunnel excavation direction 1-3 degree that is inclined upwardly, and large-diameter steel pipe is provided with injected hole.
Below described arc i iron 2, be provided with lining cutting layer 3.
The utility model protects reinforcing technique through adopting bassoon canopy pre-grouting to pay in advance to subway station import and export shallow embedding section; And adopt the i iron bow member to strengthen supporting; For tunnel trunk safety smooth construction has been created good condition; And effectively controlled stablizing and ground settlement of face, obtained good effect.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of matching relationship between big steel pipe 4, orifice sleeve 5 and the arc i iron 2 of the utility model;
Fig. 3 is the structural representation of matching relationship between arc i iron 2 on the face 1 and big steel pipe 4 of the utility model.
Specific embodiment
Below in conjunction with embodiment the utility model is described further:
The large span subway advances portal pipe canopy advanced stand device; Comprise face 1, above face 1, be provided with arc i iron 2 along the excavation curved line, the end face of arc i iron 2 is provided with equally spaced orifice sleeve 5; In each orifice sleeve 5, be provided with large-diameter steel pipe 4; Between the sidewall of large-diameter steel pipe 4 and orifice sleeve 5, be welded with fixing ribs 6, described large-diameter steel pipe 4 is along the tunnel excavation direction 1-3 degree that is inclined upwardly, and large-diameter steel pipe 4 is provided with injected hole.
Below described arc i iron 2, be provided with lining cutting layer 3.
For guaranteeing that the station advances the safety at hole, section adopts long 25 meters φ 108 bassoon canopies to add φ 32 leading ductules to carry out leading pre-supporting at the hole, and lining cutting vault outer rim press 40 centimetres of layouts of circumferential distance 1 and arranged φ 108 steel pipes along the station; The outer limb of pipe canopy is 1 °-3 °; With line parallel in the route, again toward managing interior slip casting with fixed weak surrounding rock, the space between filling steel pipe and the crag; Make pipe canopy and country rock fixed closely, improve the intensity of steel pipe.Set up 2 Pin i iron at the hole before the pipe roof construction, 50 centimetres of spacings adopt the guiding wall of mould pneumatically placed concrete as cover arch and Long Pipe-shed then, and cover encircles executes work AT STATION beyond the outer contour.The pipe canopy adopts φ 108 steel pipe manufacturings, makes a call to 15 millimeters injected hole around the tube wall, 15 centimetres of spacings, and the staggered quincuncial arrangement of holing into, tube head is welded into the taper shape of 15 centimeter length, is convenient to hand-hole, and big steel pipe 4 tails stay 3 meters ending of not holing to starch section.Tube shed grouting adopts neat slurry, cement paste water/binder ratio 1:1-1:1.5, and grouting pressure: 0.7-1.0 MPas, cement is selected superfine cement for use.Slip casting machinery is selected the two fluid grouting pump for use.Sometimes the tube shed grouting reinforcing scope is limited, is difficult to reach the reinforcing scope of regulation, in digging process, need often execute for this reason and do the grouting with small pipe reinforcement, promptly before per 1 excavation circulation, reinforces supporting with the ductule pre-grouting.
Claims (2)
1. a large span subway advances portal pipe canopy advanced stand device; Comprise face (1); Be provided with arc i iron (2) in face (1) top along the excavation curved line, it is characterized in that the end face of arc i iron (2) is provided with equally spaced orifice sleeve (5); In each orifice sleeve (5), be provided with large-diameter steel pipe (4); Between the sidewall of large-diameter steel pipe (4) and orifice sleeve (5), be welded with fixing ribs (6), described large-diameter steel pipe (4) is along the tunnel excavation direction 1-3 degree that is inclined upwardly, and large-diameter steel pipe (4) is provided with injected hole.
2. a kind of large span subway according to claim 1 advances portal pipe canopy advanced stand device, it is characterized in that, below described arc i iron (2), is provided with lining cutting layer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205469898U CN202544866U (en) | 2011-12-23 | 2011-12-23 | Advance support device for pipe shed of large-span metro tunnel portal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205469898U CN202544866U (en) | 2011-12-23 | 2011-12-23 | Advance support device for pipe shed of large-span metro tunnel portal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202544866U true CN202544866U (en) | 2012-11-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205469898U Expired - Fee Related CN202544866U (en) | 2011-12-23 | 2011-12-23 | Advance support device for pipe shed of large-span metro tunnel portal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202544866U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879137A (en) * | 2015-05-18 | 2015-09-02 | 石家庄铁道大学 | Super-large pipe shed construction method |
| CN105298517A (en) * | 2015-11-21 | 2016-02-03 | 中铁二十局集团第二工程有限公司 | Soft and weak wall rock tunnel advance reinforced support construction method |
| CN107339114A (en) * | 2017-06-08 | 2017-11-10 | 宁波市交通规划设计研究院有限公司 | Mountain highway tunnel portal critical slope pre-equilibration stability contorting structure and method |
| CN111594229A (en) * | 2020-05-28 | 2020-08-28 | 中国建筑第七工程局有限公司 | Construction method for multi-arch tunnel entrance under shallow-buried water-rich geological condition |
| CN112664202A (en) * | 2020-12-23 | 2021-04-16 | 攀钢集团工程技术有限公司 | Reverse small shed tunneling method for shallow buried section |
-
2011
- 2011-12-23 CN CN2011205469898U patent/CN202544866U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879137A (en) * | 2015-05-18 | 2015-09-02 | 石家庄铁道大学 | Super-large pipe shed construction method |
| CN105298517A (en) * | 2015-11-21 | 2016-02-03 | 中铁二十局集团第二工程有限公司 | Soft and weak wall rock tunnel advance reinforced support construction method |
| CN107339114A (en) * | 2017-06-08 | 2017-11-10 | 宁波市交通规划设计研究院有限公司 | Mountain highway tunnel portal critical slope pre-equilibration stability contorting structure and method |
| CN111594229A (en) * | 2020-05-28 | 2020-08-28 | 中国建筑第七工程局有限公司 | Construction method for multi-arch tunnel entrance under shallow-buried water-rich geological condition |
| CN111594229B (en) * | 2020-05-28 | 2021-08-20 | 中建七局交通建设有限公司 | Construction method for multi-arch tunnel entrance under shallow-buried water-rich geological condition |
| CN112664202A (en) * | 2020-12-23 | 2021-04-16 | 攀钢集团工程技术有限公司 | Reverse small shed tunneling method for shallow buried section |
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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: 20121121 Termination date: 20161223 |