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 PDF

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Publication number
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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China
Prior art keywords
frost heave
baffle
cold region
tunnel
lining
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Pending
Application number
CN201610375426.4A
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Chinese (zh)
Inventor
谭贤君
陈卫忠
杨典森
杨建平
于洪丹
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Wuhan Institute of Rock and Soil Mechanics of CAS
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Wuhan Institute of Rock and Soil Mechanics of CAS
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Application filed by Wuhan Institute of Rock and Soil Mechanics of CAS filed Critical Wuhan Institute of Rock and Soil Mechanics of CAS
Priority to CN201610375426.4A priority Critical patent/CN106050274A/en
Publication of CN106050274A publication Critical patent/CN106050274A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/38Waterproofing; Heat insulating; Soundproofing; Electric insulating

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  • 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

A kind of Cold region strong rock tunnel anti-freeze expansion structure and construction method thereof
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.
CN201610375426.4A 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 Pending CN106050274A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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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CN203296037U (en) * 2013-07-08 2013-11-20 宏祥新材料股份有限公司 Tunnel drainage plate
CN103541740A (en) * 2013-10-31 2014-01-29 同济大学 Structure system for reducing tunnel lining frost heaving force in cold region
CN104712345A (en) * 2015-01-31 2015-06-17 夏玉军 Tunnel lining concrete heat preserving and maintaining construction device
CN104806272A (en) * 2015-04-15 2015-07-29 西安科技大学 Tunnel diversion composite type waterproof and drainage system as well as construction method and use method thereof
CN204532382U (en) * 2015-04-09 2015-08-05 姚志军 Be suitable for the open-cut tunnel structure of extremely frigid zones
CN204627619U (en) * 2015-01-16 2015-09-09 重庆科技学院 Tunnel frost damage prevention system

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Publication number Priority date Publication date Assignee Title
KR20080090703A (en) * 2007-04-05 2008-10-09 현대건설주식회사 Insulation structure to prevent frost heave between waterproof sheets for tunnel
CN202250107U (en) * 2011-09-23 2012-05-30 厦门市路桥咨询监理有限公司 Tunneling anti-freezing structure in seasonally frozen ground district
CN102584081A (en) * 2012-01-05 2012-07-18 黄飞 Foam concrete additive and foam concrete
CN203296037U (en) * 2013-07-08 2013-11-20 宏祥新材料股份有限公司 Tunnel drainage plate
CN103541740A (en) * 2013-10-31 2014-01-29 同济大学 Structure system for reducing tunnel lining frost heaving force in cold region
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CN104712345A (en) * 2015-01-31 2015-06-17 夏玉军 Tunnel lining concrete heat preserving and maintaining construction device
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CN104806272A (en) * 2015-04-15 2015-07-29 西安科技大学 Tunnel diversion composite type waterproof and drainage system as well as construction method and use method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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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