CN106050274A - Anti-frost heaving structure of hard rock tunnel in cold region and construction method of anti-frost heaving structure - Google Patents
Anti-frost heaving structure of hard rock tunnel in cold region and construction method of anti-frost heaving structure Download PDFInfo
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- CN106050274A CN106050274A CN201610375426.4A CN201610375426A CN106050274A CN 106050274 A CN106050274 A CN 106050274A CN 201610375426 A CN201610375426 A CN 201610375426A CN 106050274 A CN106050274 A CN 106050274A
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- Prior art keywords
- frost heave
- baffle
- cold region
- tunnel
- lining
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- 239000011435 rock Substances 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000002528 anti-freeze Effects 0.000 claims description 29
- 239000002562 thickening agent Substances 0.000 claims description 25
- 239000011381 foam concrete Substances 0.000 claims description 22
- 108010053481 Antifreeze Proteins Proteins 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000440 bentonite Substances 0.000 claims description 7
- 229910000278 bentonite Inorganic materials 0.000 claims description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 7
- 235000013312 flour Nutrition 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 6
- 230000008014 freezing Effects 0.000 claims description 6
- 238000007710 freezing Methods 0.000 claims description 6
- 229920000620 organic polymer Polymers 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 239000002491 polymer binding agent Substances 0.000 claims description 4
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 3
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 3
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 3
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- 239000011493 spray foam Substances 0.000 claims description 3
- 239000000230 xanthan gum Substances 0.000 claims description 3
- 229920001285 xanthan gum Polymers 0.000 claims description 3
- 229940082509 xanthan gum Drugs 0.000 claims description 3
- 235000010493 xanthan gum Nutrition 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 230000006378 damage Effects 0.000 abstract description 6
- 206010030113 Oedema Diseases 0.000 description 15
- 241000521257 Hydrops Species 0.000 description 14
- 238000002360 preparation method Methods 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 230000009746 freeze damage Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002595 cold damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to an anti-frost heaving structure of a hard rock tunnel in a cold region and a construction method of the anti-frost heaving structure. The anti-frost heaving structure comprises a primary lining used for supporting the tunnel. A frost heaving absorption plate is arranged on the inner side of the primary lining. A secondary lining is arranged on the inner side of the frost heaving absorption plate. A plurality of grooves are formed in the frost heaving absorption plate, the grooves are open towards surrounding rock, and the bottoms of the grooves are sealed. The grooves are used for preventing the frost heaving effect of frozen ice generated in a water storage space of the surrounding rock of the tunnel on the secondary lining through absorption. Through the unique structural design of the frost heaving absorption plate, the frost heaving effect of frozen ice generated in holes of the surrounding rock of the tunnel on the secondary lining can be prevented through absorption, and damage of frost heaving of accumulated water to the secondary lining can be effectively avoided.
Description
Technical field
The invention belongs to technical field of tunnel construction, particularly relate to a kind of Cold region strong rock tunnel anti-freeze expansion structure and construction thereof
Method.
Background technology
Suffer freeze injury in the tunnel that Han Qu builds the most to some extent, threaten the normal operation in tunnel.Freeze injury causes tunnel
The form destroyed has: tunnel lining structure part is pushed out, and even tunnel entirety is subsided;Tunnel-liner generation large area peeling,
Crack;Arch, tunnel and side wall freeze to form icicle and wall ice, may cause melting leaking to summer, even retention of excessive fluid etc..
Investigation to built tunnel in cold area shows, the tunnel of serious cold damage phenomenon occurs at Hokkaido, Japan and the Northeast of China
In 80% be above rocky tunnel.
Building the extremely frigid zones tunnel in non-frost heave country rock, rock itself is the least so that permissible without frost heave or frost heave
Ignore.In this kind of tunnel, the water body frost heave that the frost-heaving force of lining cutting is mainly accumulated by local after backing causes.By
Irregular in rock tunnel excavation face, therefore in work progress, do not accomplish just to serve as a contrast fitting tightly between two linings, and
Just leave local water holding space between lining and two linings.Owing to the reason in terms of concrete pouring technology and concrete are at hydration process
The reason of middle autogenous volumetric deformation, this space generally exists.
Penetrating into the water body in this water holding space from country rock, frost heave can cause the broken of tunnel two-lining structure at low temperatures
Bad, this phenomenon is referred to as hydrops frost heave.Hydrops frost heaving becomes apparent from arch crown part, seriously damages construction quality.But
In conventional Tunnel Engineering is built, hydrops frost heaving does not cause the attention of engineering circles, and emphasis is pre-the most targetedly
The design of anti-hydrops frost heave structure.
Additionally, in Hard Rock Mass, the often moisture content less in country rock, it is not necessary to be provided with the waterproof of permeable structure
Plate, the splash guard simply using planar structure just can play corresponding waterproof effect, the therefore construction of conventional anti-freeze expansion structure
In, seldom there is the structure to splash guard to improve.
Summary of the invention
It is an object of the invention to as overcoming above-mentioned the deficiencies in the prior art, it is provided that a kind of Cold region strong rock tunnel anti-freeze expansion structure
And construction method.
In order to reach above-mentioned purpose, the present invention adopts the following technical scheme that
A kind of Cold region strong rock tunnel anti-freeze expansion structure, including tunnel carries out the first lining of supporting, is provided with inside described just lining
Frost heave baffle, is provided with two linings inside described frost heave baffle, the plate body of described frost heave baffle be provided with some openings towards
Country rock and the groove of bottom lock, two linings are frozen by described groove in order to the ice freezing in absorbing tunnel surrounding water holding space to produce
Swollen effect.
When the moisture in country rock penetrates into the hydrops space inside just serving as a contrast, and when there is hydrops frost heave in hydrops space, freeze
Swollen baffle can freeze in providing the space expanded, and then absorption tunnel surrounding hole for the water body freezed towards the groove of country rock
The ice the produced frost heave action to two linings.
Described groove is truncated cone-shaped, and the diameter of described slot opening end is more than the diameter of bottom lock end.
The degree of depth of described recess sidewall is 2-5cm.
Described groove is evenly arranged along the plate body of described frost heave baffle.
The diameter being smaller than described slot opening end of adjacent described groove.The area of frost heave baffle slot opening is remote
Much larger than the area of plate body, for water be frozen into ice this during produced frost heave provide enough spaces, can be abundant
Protection two lining is not encroached on by hydrops frost heave.
Described frost heave baffle plate body part is arcuate structure with the junction of described slot opening end, at the water of edge
When dividing glaciation, stress is often occurred to concentrate.Connecting portion is designed as arcuate structure, stress can be avoided to concentrate and made
The damage of the connecting portion become, it is ensured that construction quality.
Described frost heave baffle is plastic plate, and described frost heave baffle connects with tunnel bottom gutter.Frost heave is inhaled at ordinary times
Not havinging hydrops between receiving plate and just serving as a contrast, current can be discharged from tunnel bottom gutter along frost heave baffle, so frost heave
In being all to occur at just serving as a contrast.When being not provided with frost heave baffle, after frost heave reaches to a certain degree, it may occur that towards freezing of two linings
Swollen effect, and then two linings are caused damage.After being provided with frost heave baffle, the groove of frost heave baffle is that frost heave provides sky
Between, it is to avoid the directly effect to two linings of the hydrops frost heave.
Laying antifreeze cushion between described frost heave baffle and described just lining, the material of described antifreeze cushion uses bubble
Foam concrete.Two linings can be played further insulation effect by the existence of antifreeze cushion.Additionally, foam concrete is a kind of
Loose structure, has the advantages that heat conductivity is low, is preferable inorganic cold-proof heat insulation material, can effectively avoid frost heaving failure.
Adding thickening agent in described foam concrete, described thickening agent is made up by weight ratio of the raw material of following component:
Silica flour: 60-100 part;Bentonite: 40-70 part;Organic polymer binding agent: 0.3-1 part.The weight of described thickening agent accounts for foam
The 8%-15% of cement weight in concrete.Use the thickening agent of this ratio, the performance of foam concrete can be made to reach
Good.
In order to ensure site operation quality, spy have developed the special thickening agent of cast-in-place foamed concrete so that on-the-spot foam mixes
Solidifying soil pores is uniform, and primary concreting height reaches more than 1m, it is achieved that effect that the foam concrete heat-preserving performance that poured is good.
Described organic polymer binding agent is: polyacrylic acid, hydroxypropyl methylcellulose, xanthan gum or polyacrylamide.
The construction method of a kind of Cold region strong rock tunnel anti-freeze expansion structure, comprises the following steps:
Step 1: perform just lining on the surface of tunnel surrounding;
Step 2: spray foam concrete inside just lining, forms antifreeze cushion;
Step 3: laying the frost heave baffle with groove structure what the inner side of just lining left no gaps, described frost heave absorbs
The opening of plate groove is towards tunnel surrounding;
Step 4: perform two linings in the inner side of described frost heave baffle.
The invention has the beneficial effects as follows:
The structure design that frost heave baffle is unique, it is possible to two linings are frozen by the ice freezing in absorbing tunnel surrounding hole to produce
Swollen effect, can be prevented effectively from hydrops frost heaving and serve as a contrast, to two, the harm caused.
When being not provided with frost heave baffle, after frost heave reaches to a certain degree, it may occur that towards the frost heave action of two linings, enter
And two linings are caused damage.After being provided with frost heave baffle, when the moisture in country rock penetrates into the hydrops space inside just serving as a contrast, and
When there is hydrops frost heave in hydrops space, frost heave baffle can provide, for the water body freezed, the sky expanded towards the groove of country rock
Between, and then the ice freezing in absorption tunnel surrounding hole to produce is to two frost heave actions served as a contrast.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the close-up schematic view in Fig. 1 at A.
In figure: 1. country rock, 2. just serve as a contrast, 3. two linings, 4. frost heave baffle, 5. slot opening end, 6. plate body.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
Embodiment 1:
A kind of Cold region strong rock tunnel anti-freeze expansion structure, in the inner side of country rock 1, is provided with the first lining 2 that tunnel carries out supporting, just
Lining 2 inside be provided with frost heave baffle 4, be provided with two linings 3 inside frost heave baffle 4, frost heave baffle 4 be provided with some openings towards
Country rock 1 and the groove of bottom lock, groove is in order to freeze ice the freezing two linings 3 produced in absorbing tunnel surrounding 1 water holding space
Swollen effect.
Groove is truncated cone-shaped, and the diameter of slot opening end 5 is more than the diameter of bottom lock end.Groove is along frost heave baffle 4
Plate body be evenly arranged.
The diameter being smaller than slot opening end 5 of adjacent grooves.The area of frost heave baffle 4 slot opening is far longer than
The area of plate body, for water be frozen into ice this during produced frost heave provide enough spaces, can adequately protect two
Lining 3 is not encroached on by hydrops frost heave.
Plate body 6 part is arcuate structure with the junction of slot opening end 5.
Frost heave baffle 4 is plastic plate.
Laying antifreeze cushion between frost heave baffle 4 and just lining 2, the material of antifreeze cushion uses foam concrete.
The construction method of a kind of Cold region strong rock tunnel anti-freeze expansion structure, comprises the following steps:
Step 1: perform just lining 2 on the surface of tunnel surrounding 1;
Step 2: spray foam concrete inside just lining 2, forms antifreeze cushion, adds following in this foam concrete
The thickening agent be given in embodiment;
Step 3: lay the frost heave baffle 4 with groove structure, frost heave baffle what the inner side of just lining 2 left no gaps
The opening of groove is towards tunnel surrounding 1;
Step 4: perform two linings 3 in the inner side of frost heave baffle 4.
Embodiment 2:
The formula of the thickening agent added in foam concrete is: silica flour: 60 parts;Bentonite: 70 parts;Xanthan gum: 1 part,
During preparation, after weighing according to mentioned component and percentage by weight, put it into container at normal temperatures and be stirred, uniformly.
Thickening agent in use, accounts in foam concrete the 8% of cement weight according to the weight of thickening agent and fills.
Embodiment 3:
The formula of the thickening agent added in foam concrete is: silica flour: 100 parts;Bentonite: 40 parts;Polyacrylamide:
0.3 part, during preparation, after weighing according to mentioned component and percentage by weight, put it into container at normal temperatures and be stirred, uniformly
?.Thickening agent in use, accounts in foam concrete the 10% of cement weight according to the weight of thickening agent and fills.
Embodiment 4:
The formula of the thickening agent added in foam concrete is: silica flour: 70 parts;Bentonite: 50 parts;Hydroxypropyl methylcellulose
Element: 0.3 part, during preparation, after weighing according to mentioned component and percentage by weight, put it at normal temperatures container be stirred,
Uniformly.Thickening agent in use, accounts in foam concrete the 12% of cement weight according to the weight of thickening agent and fills.
Embodiment 5:
The formula of the thickening agent added in foam concrete is: silica flour: 80 parts;Bentonite: 50 parts;Polyacrylic acid: 0.5
Part, during preparation, after weighing according to mentioned component and percentage by weight, put it into container at normal temperatures and be stirred, be uniformly
Can.Thickening agent in use, accounts in foam concrete the 13% of cement weight according to the weight of thickening agent and fills.
Embodiment 6:
The formula of the thickening agent added in foam concrete is: silica flour: 60 parts;Bentonite: 60 parts;Polyacrylamide:
0.5 part, during preparation, after weighing according to mentioned component and percentage by weight, put it into container at normal temperatures and be stirred, uniformly
?.
Thickening agent in use, accounts in foam concrete the 15% of cement weight according to the weight of thickening agent and fills.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to embodiment will be apparent from for those skilled in the art, as defined herein typically
Principle can realize without departing from the spirit or scope of the present invention in other embodiments, is not described in detail
Part, for prior art, do not repeat at this.Therefore, the present invention is not intended to be limited to these enforcements shown in this article
Example, and it is to fit to the widest scope consistent with principles disclosed herein and feature.
Claims (10)
1. a Cold region strong rock tunnel anti-freeze expansion structure, it is characterised in that: include the first lining that tunnel is carried out supporting, described just lining
Inner side is provided with frost heave baffle, is provided with two linings inside described frost heave baffle, and described frost heave baffle is provided with some opening courts
To country rock and the groove of bottom lock, described groove serves as a contrast two in order to the ice freezing to produce in absorbing tunnel surrounding water holding space
Frost heave action.
A kind of Cold region strong rock tunnel anti-freeze expansion structure the most according to claim 1, it is characterised in that: described groove is round platform
Shape, the diameter of described slot opening end is more than the diameter of bottom lock end.
A kind of Cold region strong rock tunnel anti-freeze expansion structure the most according to claim 2, it is characterised in that: described groove is along described
The plate body of frost heave baffle is evenly arranged.
A kind of Cold region strong rock tunnel anti-freeze expansion structure the most according to claim 3, it is characterised in that: adjacent described groove
It is smaller than the diameter of described slot opening end.
A kind of Cold region strong rock tunnel anti-freeze expansion structure the most according to claim 1, it is characterised in that: described frost heave baffle
Plate body part is arcuate structure with the junction of described slot opening end.
A kind of Cold region strong rock tunnel anti-freeze expansion structure the most according to claim 1, it is characterised in that: described frost heave baffle
For plastic plate, described frost heave baffle connects with tunnel bottom gutter.
7. according to the arbitrary described a kind of Cold region strong rock tunnel anti-freeze expansion structure of claim 1-6, it is characterised in that: described frost heave
Laying antifreeze cushion between baffle and described just lining, the material of described antifreeze cushion uses foam concrete.
A kind of Cold region strong rock tunnel anti-freeze expansion structure the most according to claim 7, it is characterised in that: described foam concrete
Middle interpolation thickening agent, described thickening agent is made up by weight ratio of the raw material of following component: silica flour: 60-100 part;Bentonite:
40-70 part;Organic polymer binding agent: 0.3-1 part;The weight of described thickening agent accounts for the 8%-of cement weight in foam concrete
15%.
A kind of Cold region strong rock tunnel anti-freeze expansion structure the most according to claim 8, it is characterised in that: described organic polymer
Binding agent is: the mixing of one or more of polyacrylic acid, hydroxypropyl methylcellulose, xanthan gum or polyacrylamide.
10. the construction method of a Cold region strong rock tunnel anti-freeze expansion structure, it is characterised in that comprise the following steps:
The construction method of a kind of Cold region strong rock tunnel anti-freeze expansion structure, comprises the following steps:
Step 1: perform just lining on the surface of tunnel surrounding;
Step 2: spray foam concrete inside just lining, forms antifreeze cushion, adds following enforcement in this foam concrete
The thickening agent be given in example;
Step 3: lay the frost heave baffle 4 with groove structure, frost heave baffle groove what the inner side of just lining left no gaps
Opening towards tunnel surrounding;
Step 4: perform two linings in the inner side of frost heave baffle.
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CN201610375426.4A CN106050274A (en) | 2016-05-31 | 2016-05-31 | Anti-frost heaving structure of hard rock tunnel in cold region and construction method of anti-frost heaving structure |
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CN201610375426.4A CN106050274A (en) | 2016-05-31 | 2016-05-31 | Anti-frost heaving structure of hard rock tunnel in cold region and construction method of anti-frost heaving structure |
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Cited By (5)
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---|---|---|---|---|
CN106988759A (en) * | 2017-06-02 | 2017-07-28 | 中南林业科技大学 | Lining also serves as the tunnel structure of buffer layer at the beginning of foam concrete |
CN108166999A (en) * | 2017-09-18 | 2018-06-15 | 招商局重庆交通科研设计院有限公司 | A kind of antifreeze fire proof construction of the waterproof of tunnel in cold area |
CN108561163A (en) * | 2018-05-29 | 2018-09-21 | 陈禹彤 | A kind of water-proof sheet material and its construction method |
CN111753359A (en) * | 2020-06-22 | 2020-10-09 | 河北交通职业技术学院 | Tunnel local water storage frost heaving force calculation method based on approximate power function and application thereof |
CN112627889A (en) * | 2020-12-21 | 2021-04-09 | 中铁二院工程集团有限责任公司 | High-cold long and large railway tunnel anti-freezing structure and method utilizing surrounding rock underground water heat energy |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106988759A (en) * | 2017-06-02 | 2017-07-28 | 中南林业科技大学 | Lining also serves as the tunnel structure of buffer layer at the beginning of foam concrete |
CN108166999A (en) * | 2017-09-18 | 2018-06-15 | 招商局重庆交通科研设计院有限公司 | A kind of antifreeze fire proof construction of the waterproof of tunnel in cold area |
CN108561163A (en) * | 2018-05-29 | 2018-09-21 | 陈禹彤 | A kind of water-proof sheet material and its construction method |
CN111753359A (en) * | 2020-06-22 | 2020-10-09 | 河北交通职业技术学院 | Tunnel local water storage frost heaving force calculation method based on approximate power function and application thereof |
CN111753359B (en) * | 2020-06-22 | 2023-05-12 | 河北交通职业技术学院 | Tunnel local water-storage frost heaving force calculation method based on approximate power function and application thereof |
CN112627889A (en) * | 2020-12-21 | 2021-04-09 | 中铁二院工程集团有限责任公司 | High-cold long and large railway tunnel anti-freezing structure and method utilizing surrounding rock underground water heat energy |
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Application publication date: 20161026 |
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