CN202132053U - VI-level surrounding-rock double track tunnel lining support structure - Google Patents
VI-level surrounding-rock double track tunnel lining support structure Download PDFInfo
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- CN202132053U CN202132053U CN201120212116U CN201120212116U CN202132053U CN 202132053 U CN202132053 U CN 202132053U CN 201120212116 U CN201120212116 U CN 201120212116U CN 201120212116 U CN201120212116 U CN 201120212116U CN 202132053 U CN202132053 U CN 202132053U
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- preliminary bracing
- double track
- rock
- track tunnel
- tunnel lining
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Abstract
The utility model relates to a VI-level surrounding-rock double track tunnel lining support structure, capable of dynamically adjusting the support structure during the construction process, effectively ensuring the primary support safety and not resulting into excessively deforming and invading border even collapsing and simultaneously not using the excessive support step due to bad surrounding-rock condition, so as to effectively ensure the construction safety and save the engine investment. The VI-level surrounding-rock double track tunnel lining support structure comprises a primary support (10) for closing the surface of the surrounding rock and a secondary lining (30) molded in the primary support (10), wherein a primary support deformation and reinforcement space (20) capable of performing the reinforcement support is preset between the primary support (10) and the secondary lining (30).
Description
Technical field
The utility model relates to the tunnel, particularly a kind of double track tunnel lining cutting supporting and protection structure through VI level country rock location.
Background technology
Along with country strengthens the construction to infrastructure; China railways had obtained significant progress and development in the last few years; Particularly along with the construction of high-speed railway, receive the control of circuit technical standard, rail track need pass through high and steep mountains; Thereby emerged a large amount of tunnels in railway engineering, and a large amount of growing up and super long tunnel inevitably occurred.According to incomplete statistics, by the end of the year 2010, China has 9131 in the railway tunnel of building and plan at present, 18570km.Along with railway tunnel is built on a large scale, the safety for tunnel engineering problem more and more causes the attention of building each side.
Railway tunnel receives the control of circuit technical standard and the restriction of geological exploration techniques at present; Some tunnels of growing up inevitably will pass the bad geological sections such as bottom of the strong rich water fault belt of some regional extruding, loose talus body, strong expansive soil, existing river or reservoir; Above-mentioned these poorly plastid in the tunnel excavation process, be moist soft structure; Face can not be from steady; And under influence on groundwater, very easily causing face to gush the mud landslide, the ordinary circumstance analysis-by-synthesis is decided to be VI level country rock.In above-mentioned poorly plastid, construct; In the digging process because the wall rock condition extreme difference; Face landslide very easily takes place, gush mud, preliminary bracing large deformation even cave in brings great hidden danger to construction safety; Direct threats has also had a strong impact on the site operation progress simultaneously to field operation personnel's life security.
At present, when the job site ran into above-mentioned poorly plastid, common way had: first kind; Change construction, adopt CRD or the excavation method of double side wall pilot tunnel method halves, strengthen preliminary bracing and secondary lining simultaneously; Because the wall rock condition extreme difference, rock mass does not have any self-stable ability basically, very easily early period of origination supporting sudden change in removing interim perpendicular support and stull process behind the partial excavation; And cause landslide, and CRD or double side wall pilot tunnel method excavation operation is various in addition, and the site operation personnel are difficult to execute by design fully put in place; Each operation longitudinal extent is relatively poor in addition, and preliminary bracing becomes ring later, and construction safety risk is still very high; Second kind, adopt pre-grouting earlier the front of tunnel heading Mining in Rock Mass to be reinforced improvement with slip casting, strengthen preliminary bracing and advance support then; Guarantee the safety of work progress, this method can guarantee construction safety generally speaking, but owing to slip casting part in to the rock mass reinforcing improved, process possibly start a leak; Pressure from surrounding rock was still bigger after preliminary bracing formed in addition; The preliminary bracing distortion is difficult to convergence, causes the preliminary bracing distortion to invade limit, thereby need change reinforcement to preliminary bracing; The third is adopting pre-grouting earlier the front of tunnel heading Mining in Rock Mass to be reinforced with slip casting on the basis of improvement exactly, adopts the bilateral steelframe to strengthen preliminary bracing again, guarantees construction safety.
The utility model content
The utility model technical problem to be solved provides a kind of VI level country rock double track tunnel lining cutting supporting and protection structure; Can realize dynamically adjusting in the work progress supporting and protection structure; Can effectively guarantee the safety of preliminary bracing; Be unlikely to cause excessive deformation to invade limit even landslide, the supporting measure that can not overuse because of the wall rock condition difference again simultaneously can effectively be guaranteed construction safety and practice thrift construction investment.
It is following that the utility model solves the technical scheme that its technical problem adopted:
The VI level country rock double track tunnel lining cutting supporting and protection structure of the utility model; Comprise the preliminary bracing on sealing country rock surface; And mould builds in preliminary bracing with interior secondary lining, it is characterized in that: be reserved with between said preliminary bracing and the secondary lining and can execute preliminary bracing distortion and the reinforcement space of doing to add strong supporting within it.
The beneficial effect of the utility model is; Through reserving preliminary bracing distortion and reinforcement space; Realize dynamically adjusting supporting and protection structure in the work progress, can effectively guarantee the safety of preliminary bracing, be unlikely to cause excessive deformation to invade limit even landslide; The supporting measure that can not overuse because of the wall rock condition difference again simultaneously can effectively be practiced thrift construction investment
Through reserving preliminary bracing distortion and reinforcement space, solved the local paragraph in tunnel and excessively caused invading limit even landslide because of being out of shape, and need change preliminary bracing, reinforcement, the problem that causes construction delay, engineering to scrap; Be the excessive support pattern of guaranteeing that construction safety adopts through distortion reinforcement space being set in advance, having improved,, help reducing the engineering-built cost like the double-deck steelframe supporting of direct employing etc.
Description of drawings
This manual comprises following two width of cloth accompanying drawings:
Fig. 1 is the utility model VI level country rock double track tunnel lining cutting supporting and protection structure schematic cross-sectional view;
Fig. 2 is the local enlarged diagram of the utility model VI level country rock double track tunnel lining cutting supporting and protection structure.
Member shown in the figure, toponym and pairing mark: preliminary bracing 10, steelframe 11, first pneumatically placed concrete layer 12, multiple pneumatically placed concrete layer 13, preliminary bracing distortion and reinforcement space 20, reinforcement steelframe 21, multiple pneumatically placed concrete layer 22, secondary lining 30.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
See figures.1.and.2, VI level country rock double track tunnel lining cutting supporting and protection structure comprise the preliminary bracing 10 on sealing country rock surface, and mould is built in preliminary bracing 10 with interior secondary lining 30.Be reserved with between said preliminary bracing 10 and the secondary lining 30 and can execute preliminary bracing distortion and the reinforcement space 20 of doing to add strong supporting within it.Only execute generally speaking and do preliminary bracing 10; At indivedual paragraphs because big monitoring measurement interpretation of result preliminary bracing 10 distortion of pressure from surrounding rock are difficult to stable or preliminary bracing has taken place under the situation of tangible strain cracking; Should in time execute and do to add strong supporting, to guarantee construction safety.The utility model is through reserving preliminary bracing distortion and reinforcement space 20, solved the local paragraph in tunnel and excessively caused invading limit even landslide because of being out of shape, and need change preliminary bracing 10, reinforcement, the problem that causes construction delay, engineering to scrap.Through preliminary bracing distortion and reinforcement space 20, improved and be the excessive support pattern of guaranteeing that construction safety adopts, like double-deck steelframe supporting of direct employing etc., help reducing the engineering-built cost.
With reference to Fig. 2, said preliminary bracing 10 comprises the shotcrete layer and the steelframe of burying underground in it 11 on sealing country rock surface, and shotcrete layer is made up of first pneumatically placed concrete layer 12 and multiple pneumatically placed concrete layer 13.Saidly add strong supporting and be made up of multiple pneumatically placed concrete layer 22 and the reinforcement steelframe 21 that is embedded in it, the width in preliminary bracing distortion and reinforcement space 20 is generally 35cm.
Embodiment:
The Chengdu-Kunming Railway Line extensively passes to the peaceful tunnel of section capacity expansion revamping engineering show, Kunming, this tunnel total length 13187m, and design speed per hour 200km is single hole double track tunnel, is the wide the longest tunnel of elder brother's line.This tunnel body is through ancient Kunyang group strata of metamorphic rocks, and formation lithology is complicated and changeable, and barrel is through 5 fold structures and 8 regional faults; The maximum buried depth 550m of barrel, wherein (DK1005+850～DK1006+360) through Roots～Yimen major rupture band, this fault zone is a regional faults that scale is huge to outlet section; About 800～the 1000m of width, with wearing a reservoir at present, the outlet section buried depth is at 9～63m; Its country rock composition is mostly the mylonitization tomography dust shale composition that contains mud is the carbonaceous slate rock dust; Do not have gluing, distribution of particles is more even, and the rich water of rock mass is saturated shape.Behind the excavation, under the seepage action of ground water effect, be stream and mould shape, very easily the generation slide is collapsed and is gushed the mud water burst.
(DK1005+850～DK1006+170) a section constructure scheme of taking at present is exactly at first to adopt leading curtain-grouting that the front of tunnel heading country rock is reinforced to the present outlet section of this tunnel; Adopt the utility model VI level country rock double track tunnel supporting and protection structure then; The scene is well used, and has guaranteed construction safety.
Some principles of the above the utility model VI level country rock double track tunnel lining cutting supporting and protection structure that just explains through diagrams; Be not be to the utility model be confined to shown in described concrete structure and the scope of application in; So every the modify and equivalent that might be utilized all belongs to the claim that the utility model is applied for.
Claims (3)
1. VI level country rock double track tunnel lining cutting supporting and protection structure; Comprise the preliminary bracing (10) on sealing country rock surface; And mould builds in preliminary bracing (10) with interior secondary lining (30), it is characterized in that: be reserved with between said preliminary bracing (10) and the secondary lining (30) and can execute preliminary bracing distortion and reinforcement space (20) of doing to add strong supporting within it.
2. VI level country rock double track tunnel lining cutting supporting and protection structure as claimed in claim 1 is characterized in that: saidly add strong supporting by multiple pneumatically placed concrete layer (22) and reinforcement steelframe (21) formation that is embedded in it.
3. according to claim 1 or claim 2 VI level country rock double track tunnel lining cutting supporting and protection structure, it is characterized in that: the width of said preliminary bracing distortion and reinforcement space (20) is 35cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120212116U CN202132053U (en) | 2011-06-22 | 2011-06-22 | VI-level surrounding-rock double track tunnel lining support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120212116U CN202132053U (en) | 2011-06-22 | 2011-06-22 | VI-level surrounding-rock double track tunnel lining support structure |
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| Publication Number | Publication Date |
|---|---|
| CN202132053U true CN202132053U (en) | 2012-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120212116U Expired - Lifetime CN202132053U (en) | 2011-06-22 | 2011-06-22 | VI-level surrounding-rock double track tunnel lining support structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527219A (en) * | 2013-10-18 | 2014-01-22 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel supporting structure used for large deformation stratum and construction method of tunnel supporting structure |
| CN104533446A (en) * | 2015-01-16 | 2015-04-22 | 中交一公局第一工程有限公司 | Construction method and structure of two-layer preliminary support for preventing geological disaster of large-section weak surrounding rock tunnel |
| CN104712346A (en) * | 2015-02-03 | 2015-06-17 | 西南交通大学 | Asymmetrical tunnel lining structure |
| CN106014456A (en) * | 2016-07-22 | 2016-10-12 | 长安大学 | Double-layer lining special quasi-circular sectional mining method tunnel structure and construction method thereof |
| CN114278313A (en) * | 2021-12-31 | 2022-04-05 | 北京住总集团有限责任公司 | Supporting system based on interval different excavation construction method conversion and construction method |
-
2011
- 2011-06-22 CN CN201120212116U patent/CN202132053U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527219A (en) * | 2013-10-18 | 2014-01-22 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel supporting structure used for large deformation stratum and construction method of tunnel supporting structure |
| CN103527219B (en) * | 2013-10-18 | 2016-03-16 | 四川省交通运输厅公路规划勘察设计研究院 | For the construction of the tunnel support structure on large deformation stratum |
| CN104533446A (en) * | 2015-01-16 | 2015-04-22 | 中交一公局第一工程有限公司 | Construction method and structure of two-layer preliminary support for preventing geological disaster of large-section weak surrounding rock tunnel |
| CN104533446B (en) * | 2015-01-16 | 2017-06-06 | 中交一公局第一工程有限公司 | Construction method and its structure that a kind of big cross section Support System in Soft Rock Tunnels bilayer pre- Geological disaster prevention of preliminary bracing occurs |
| CN104712346A (en) * | 2015-02-03 | 2015-06-17 | 西南交通大学 | Asymmetrical tunnel lining structure |
| CN106014456A (en) * | 2016-07-22 | 2016-10-12 | 长安大学 | Double-layer lining special quasi-circular sectional mining method tunnel structure and construction method thereof |
| CN114278313A (en) * | 2021-12-31 | 2022-04-05 | 北京住总集团有限责任公司 | Supporting system based on interval different excavation construction method conversion and construction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120201 |