CN107246273A - Deep tunnel wire rope net rubber concrete spraying support structure and its construction method - Google Patents
Deep tunnel wire rope net rubber concrete spraying support structure and its construction method Download PDFInfo
- Publication number
- CN107246273A CN107246273A CN201710635220.5A CN201710635220A CN107246273A CN 107246273 A CN107246273 A CN 107246273A CN 201710635220 A CN201710635220 A CN 201710635220A CN 107246273 A CN107246273 A CN 107246273A
- Authority
- CN
- China
- Prior art keywords
- anchor
- tunnel
- deep
- rubber concrete
- rubber
- 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.)
- Granted
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 130
- 238000005507 spraying Methods 0.000 title claims abstract description 22
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 239000011435 rock Substances 0.000 claims abstract description 88
- 238000010348 incorporation Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 47
- 239000010959 steel Substances 0.000 claims description 47
- 239000002184 metal Substances 0.000 claims description 45
- 229910052751 metal Inorganic materials 0.000 claims description 45
- 150000002739 metals Chemical class 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 238000005345 coagulation Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims 1
- 239000011378 shotcrete Substances 0.000 abstract description 26
- 239000004575 stone Substances 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000008093 supporting effect Effects 0.000 description 25
- 239000004568 cement Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 238000007569 slipcasting Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 241001347978 Major minor Species 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000006961 mixed inhibition Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000010089 rubber coagulation Methods 0.000 description 1
- 239000011386 rubberized concrete Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Deep tunnel wire rope net rubber concrete spraying support structure, including be arranged in the twice pressure relief groove of roadway floor both sides and be injected in the wire rope net rubber concrete spray-up on roadway surrounding rock surface；Wire rope net rubber concrete spray-up includes the first rubber concrete layer and the second rubber concrete layer for being injected in deep laneway surrounding rock surface successively, and the first rubber concrete layer and the second rubber concrete layer are made by rubber grain by incorporation concrete；In summary, the present invention proposes a kind of anchor pole, wire rope net, rubber gunite concrete, and the construction method of the Deep Soft Rock Tunnel of wall rock grouting, the construction method is for the Deep Soft Rock Tunnel particularly length of service longer stone head and important chamber, to improve the self-supporting tendency and bolting with wire mesh performance of Deep Soft Rock Tunnel country rock, mitigate the labor intensity of workman, reduction roadway support and maintenance cost etc. bring good economic benefit and social benefit, and can further specification Deep Soft Rock Tunnel construction technology.
Description
Technical field
The invention belongs to colliery tunnel support technical field, and in particular to a kind of deep tunnel wire rope net rubber injection is mixed
Solidifying soil supporting construction and its construction method.
Background technology
The China's coal-mine overwhelming majority is underground mine, needs to tunnel substantial amounts of stone head every year.As coal mining is deep
The continuous deepening of degree, stone head country rock is gradated as deep soft rock.Because Deep Soft Rock Tunnel surrouding rock stress is high, country rock rock
Property poor, intensity bottom, rock deformation is big, roadway's sides and crush, bottom plate distension rises, roadway deformation destruction is serious, or even goes out
Now it is repeated several times and overhauls phenomenon.
After deep laneway surrounding rock rough section is excavated, concrete spraying support is implemented to newly exposed country rock first, utilized
Concrete spray coating is reinforced and enclosing tunnel country rock.Gunite concrete is by the cement, sand, stone of certain match ratio, and speed
The mix of solidifying agent, using compressed air as power, using concrete sprayer, is pipelined at lance outlet, with water
After mixing, rock wall is ejected into higher speed layering and a kind of concrete formed after hardening is condensed.It is this traditional
Concrete spraying support has filling fracture, the effect filled up depression, reinforce rock stratum, has become colliery Deep Soft Rock Tunnel
Basic supporting.Conventional spray concrete is the main material of tunnel basic supporting.After current Deep Soft Rock Tunnel is excavated, first
Anchor pole, close plating net, gunite concrete closing country rock are beaten country rock, grouting and reinforcing finally is implemented to country rock.Current deep soft rock
Tunnel original design section is increasing, and supporting intensity is gradually stepped up, supporting expense also more and more higher.Using the totally-enclosed of routine
U-shaped steel Yieldable steel support, high strength anchor bar（Sometimes anchor cable）, wire netting（Sometimes bar-mat reinforcement）The anchor constituted with gunite concrete
Net spray supporting, and the anchor pole wire netting wall rock grouting combined supporting abbreviation anchor net of wall rock grouting composition note combined supporting, sometimes
Also it is difficult to ensure that the steady in a long-term of Deep Soft Rock Tunnel country rock, it is difficult to the need for meeting Safety of Coal Mine Production.Current deep soft rock
Subject matter present in alley way anchor net note combined supporting：
（1）The gunite concrete overwhelming majority is common gunite concrete, common gunite concrete in existing anchor net note combined supporting
It is that, by the mix of the cement, sand, stone of certain match ratio, and accelerator, cement, thick middle husky, the weight ratio of stone are
1:2:2, the wherein ratio of mud 0.4 ~ 0.5.Common gunite concrete has compression strength high, and tensile strength is low, the features such as fragility is big.
When deflection is more than 50~100mm, there is crack, crushes, loosens and come off in the concrete spray coating that anchor net is noted in combined supporting
Deformation failure phenomenon, concrete spraying support failure.After concrete spray coating is cracking loosely, easily concrete is caused to spray
Layer interior metal net or bar-mat reinforcement corrosion cause concrete deterioration, and this is the main cause for causing anchor net to note supporting failure damage.
Therefore existing common concrete spraying support has been difficult in adapt to the engineering of the large deformation of Deep Soft Rock Tunnel country rock and long-term rheology
Geological conditions.
Compared with common gunite concrete, the steel fibrous shotcrete used sometimes, its tension, shearing resistance and bending strength
Mechanical property has different degrees of raising, while adding the toughness properties of gunite concrete, changes Brittleness of Concrete and breaks
Bad feature, rich in certain ductility while making it have higher-strength.But steel fibre and coagulation in steel fibrous shotcrete
Soil matrix body bears external loads jointly, and the development of the presence of steel fibre to concrete tension fracture serves inhibition, but mixed
Solidifying soil matrix body is the main undertaker of external force.Concrete microcrack can drastically be expanded in the presence of external force, but steel fibre is mixed
Inhibition is played in solidifying native the ftracture bending resistance for remaining to keep higher later, shearing strength, the development to concrete tension fracture.But
Steel fiber reinforced concrete remains as fragile material, is carried out in the deep weak surrounding rock, Swelling Rock that surrouding rock deformation is big, self-stability is poor
When anchor net notes combined supporting, the application of steel fibrous shotcrete supporting is restricted.
（2）Existing anchor net notes the wire netting of supporting（Bar-mat reinforcement）It is difficult to closely connected with roadway surrounding rock, and wire netting mesh is less than normal,
Concrete spray coating and roadway surrounding rock leakiness even absciss layer, the reduction of deep soft rock bolting with wire mesh performance.By wire netting barrier effect,
Rebound of shotcrete rate is high, spray-up density is poor, or even cavity and ravel area occurs.Colliery anchor net notes the metal of combined supporting
Net（Bar-mat reinforcement）Generally weave/be welded using mild steel wire, wire netting routine specification length is a width of：1×2m、2×4m、1×
3m, 2.0 ~ 6.5mm of steel wire diameter, mesh are generally 100 × 100mm, 120 × 120mm square holes.Tunnel is new sudden and violent after excavating
The country rock section of dew is generally uneven, after using anchor pole, wire netting is hung up, and wire netting hinders the sunk area in country rock face
Gear.When spray that pressure is smaller or jet length farther out when, gunite concrete is likely to accumulate in the outside of wire netting, in wire netting
Inner face forms cavity or ravel area.When country rock is aqueous abundant, wire netting easily occurs corrosion and loses wall supporting performance.Work as injection
Pressure is larger or during nearer jet length, by the small barrier effect of metal mesh opening, causes a large amount of resiliences of gunite concrete.
（3）Existing wall rock grouting anchor pole is general to be processed by common zinc-plated seamless steel pipe, and grouted anchor bar does not have pretension
Power and anchor force, only play a part of grouting and reinforcing to country rock, do not have anchor rod anchored performance, are actually slip casting steel
Pipe.
The content of the invention
The present invention in order to solve weak point of the prior art there is provided a kind of anchor net note supporting performance it is good, steady in a long-term,
Support cost low deep tunnel wire rope net rubber concrete spraying support structure and its construction method.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：The injection of deep tunnel wire rope net rubber is mixed
Solidifying soil supporting construction, including the twice pressure relief groove for being arranged in roadway floor both sides and the wire rope net for being injected in roadway surrounding rock surface
Rubber concrete spray-up；Wire rope net rubber concrete spray-up includes the first rubber for being injected in deep laneway surrounding rock surface successively
Concrete layer and the second rubber concrete layer, the first rubber concrete layer and the second rubber concrete layer by rubber grain by
Incorporation concrete is made, using the length direction in tunnel as its axial direction, using the peripheral direction in tunnel as its ring direction, to hang down
The straight direction in roadway surrounding rock surface is that some row's anchor metals layer is provided with its radial direction, the rock stratum in tunnel-surrounding deep,
Some row's anchor metal layers are arranged side by side along the axial direction in tunnel, often arrange the ring that anchor metal layer includes some along tunnel
The anchor metal that direction is evenly arranged, radial direction of the every anchor metal along tunnel is set, and the anchor tail end of anchor metal passes through
Nut is fixed with is laminated the pallet being tight compact with the first rubber concrete；Side by side between the anchor tail end of two adjacent anchor metals
Connected by main rope, king wire netting is formed between all main ropes, side by side between two adjacent main ropes
Connected by secondary steel wire rope, secondary wire rope net is formed between all secondary steel wire ropes；
Twice pressure relief groove is symmetricly set on the left and right sides of roadway floor.
The thickness of first rubber concrete layer is 80mm, and the thickness of the second rubber concrete layer is 120mm.
Spacing between the anchor tail end of two adjacent anchor metals is 700mm, and anchor metal is screw-thread steel, screw-thread steel
A diameter of 22mm, the length of screw-thread steel is 2400mm.
The cross sectional shape of pressure relief groove is rectangle, and the width of the square-section of pressure relief groove is 800mm, and depth is 2000mm.
The construction method of deep tunnel wire rope net rubber concrete spraying support structure, comprises the following steps：
（1）Roadway construction is carried out into lane using photoface exploision method, the rough section of Deep Soft Rock Tunnel is formed；
（2）Prepare rubber concrete：Junked tire is made to 0.9 ~ 2.0mm of diameter rubber grain, then by rubber grain
Mix in concrete admixture, as rubber concrete admixture；
（3）First injection rubber concrete is carried out to roadway surrounding rock, the first rubber concrete layer, the first rubber concrete layer is formed
Thickness be 80mm；
（4）Along the axial direction in tunnel construct successively anchor metal layer：Bolthole is beaten along the radial direction in tunnel, then by resin
Anchor Agent is put into anchor pole aperture, and anchor metal and the Anchor Agent of front end are together sent into bolthole bottom using jumbolter and revolved
Turn, the body of rod of anchor metal is anchored using resin anchoring agent, the anchor tail end of anchor metal is installed by pallet and is pressed on first
On rubber concrete layer；
（5）The anchor tail end of two adjacent side by side anchor metals is connected by main rope, will side by side by secondary steel wire rope
Adjacent two main ropes connection, circumferential direction of the which part pair steel wire rope along tunnel is set, and the secondary steel wire rope in part is along lane
The axial direction in road is set；
（6）The second rubber concrete layer is sprayed in the outer surface of the first rubber concrete layer, wherein the second rubber concrete layer
Thickness is 120mm；
（7）Dig out twice pressure relief groove：Along the axial direction in tunnel, using pneumatic pick one is dug out respectively in the bottom plate left and right sides in tunnel
The pressure relief groove of bar strip, pressure relief groove is using the boundary line of the lateral wall of tunnel one as line of symmetry, and the cross section of pressure relief groove is rectangle, wherein
The depth of the rectangular cross section of pressure relief groove is 2000mm, and width is 800mm；
（8）After pressure relief groove is excavated, roadway surrounding rock deforms, after country rock release in 10-15 days, utilizes common injection coagulation
Soil carries out Concrete Filled to twice pressure relief groove；
（9）After roadway floor release, grouting and reinforcing is carried out to roadway surrounding rock and bottom plate using hollow grouted anchor bar.
Step（9）In, it is to the grouting method of roadway surrounding rock using grouted anchor bar：
a）Shallow injected hole is beaten along the radial direction of roadway surrounding rock, the hole depth of shallow injected hole is 2000 ~ 2500mm, adjacent side by side
The spacing of two shallow injected holes is 1500mm, and shallow grouted anchor bar is inserted in shallow injected hole, and shallow grouted anchor bar is hollow structure,
A diameter of 22mm of shallow grouted anchor bar, length is 1800mm, and shallow-layer country rock note is carried out to shallow injected hole by shallow grouted anchor bar
Slurry；
b）Deep injected hole is beaten along the radial direction of roadway surrounding rock, the hole depth of deep injected hole is 2500 ~ 3500mm, adjacent side by side
The spacing of two deep injected holes is 1500mm, and deep grouted anchor bar is inserted in deep injected hole, and deep grouted anchor bar is hollow structure,
A diameter of 22mm of deep grouted anchor bar, length is 2200mm, and deep-level country rock note is carried out to deep injected hole by deep grouted anchor bar
Slurry.
Above-mentioned technical proposal is used, the invention has the advantages that：
（1）Between colliery is scrapped between pit rope after non-oil ultra high vacuum system and working process, for replacing traditional anchor net branch
Wire netting in shield（Bar-mat reinforcement）.After the concrete spraying support of tunnel, wire rope net and gunite concrete constitute steel wire rope
Net gunite concrete, the overall performance of gunite concrete is improved.
After the pit rope scrapped is handled through non-oil ultra high vacuum system, cut is carried out according to certain length, afterwards to whole steel wire
Rope is split according to single, double stock.Steel wire rope is axially laid along tunnel with ring, array pitch and spacing respectively for 200 ~ 800mm not
Deng；Wire rope net is the graticules worked out by the single, double strand steel wire rope along tunnel axial direction, ring direction arrangement.Wherein
8 ~ 20mm of the diameter phi that is connected with anchor pole steel wire rope is referred to as main rope, is generally made up of twin cable.Not directly with anchor pole phase
Connection, the steel wire rope for playing wall supporting effect is referred to as secondary rope, and pair rope is made up of single-strand rope.Steel wire rope host restricts through anchor pole bar
Body, and anchor rod pallet board compacting.The lap of splice between major-minor rope cannot be less than 400mm；Tunnel axial direction major-minor rope length degree is not small
In 10m, tunnel ring direction major-minor rope length degree is that drift section girth subtracts roadway floor width.
（2）Appropriate rubber grain is mixed in common gunite concrete, the compression strength and bullet of gunite concrete is reduced
Property modulus, increase ultimate deformation amount, common gunite concrete is modified as flexible gunite concrete, to adapt to Deep Soft Rock Tunnel
The requirement of large deformation.
Common gunite concrete be by the mix of the cement, sand, stone of certain match ratio, and accelerator, cement,
The weight ratio of husky, stone is 1 in thick:2:2, the wherein ratio of mud 0.4 ~ 0.5.Common gunite concrete has compression strength high, resists
Tensile strength is low, the features such as fragility is big.
Junked tire is made to 0.9 ~ 2.0mm of diameter rubber grain（Powder）, then with suitable volume（About 150kg/
m3）Add in normal concrete, as rubberized concrete, with relatively low modulus of elasticity and larger ultimate tensile strength,
Therefore rubber concrete belongs to flexible concrete, the larger deformation of roadway surrounding rock is adapted to without ftractureing, so rubber coagulation
Soil will have broad application prospects in China's deep tunnel bolt-mesh-spurting supporting；
The present invention has relatively low modulus of elasticity and larger ultimate tensile strength amount using rubber concrete, can adapt to larger change
Shape is without ftractureing.So existing normal concrete is modified as into flexible concrete, colliery Deep Soft Rock Tunnel is applied to
In anchor net note combined supporting, not only cost-effective but also realization environmental protection, it is possible to achieve the green tunneling construction of Deep Soft Rock Tunnel.
（3）The present invention replaces existing slip casting steel pipe using ordinary hollow grouted anchor bar, and in-site installation is convenient, realizes pressure
Slip casting；The body of rod property placed in the middle of the grouted anchor bar is good, realize and wrap up body of rod total length after total length slip casting, it is to avoid body of rod corrosion
Possibility, reaches the purpose of long-term anchoring support.Noted during wall rock grouting using ordinary hollow grouted anchor bar instead of existing country rock
Steel pipe is starched, the double action with slip casting steel pipe and Bolt further improves the anchoring property of anchor pole.
Ordinary hollow grouted anchor bar mainly has hollow bolt body, stop grouting plug, backing plate, nut and anchor head（Drill bit）Composition, can
To realize wall rock grouting and anchor rod anchored integration.Roadway surrounding rock is noted（Pressure）The body of rod, grouting pressure can not only be anchored after slurries
Around one timing fraction slurries infiltration anchor hole in crack, play a part of reinforcing country rock.
In summary, for Deep Soft Rock Tunnel surrouding rock stress height, Surrounding Rock Strength bottom, rock deformation be big, supporting expense
High Deep Soft Rock Tunnel support technology problem, from improvement roadway surrounding rock stress state, raising rock encloses rock mass strength and change is enclosed
The angle of rock mass physical mechanical property is set out, and the present invention proposes a kind of anchor pole, wire rope net, rubber gunite concrete, and
The construction method of the Deep Soft Rock Tunnel of wall rock grouting, the construction method is longer for the Deep Soft Rock Tunnel particularly length of service
Stone head and important chamber, for improve Deep Soft Rock Tunnel country rock self-supporting tendency and bolting with wire mesh performance, mitigate workman
Labor intensity, reduction roadway support and maintenance cost etc. brings good economic benefit and social benefit, and can be further
The construction technology of specification Deep Soft Rock Tunnel.
Brief description of the drawings
Fig. 1 is that the present invention is located at supporting section structure schematic diagram in Deep Soft Rock Tunnel；
Fig. 2 is the mounting structure schematic diagram of anchor metal in the present invention；
Fig. 3 is the structure section figure of king wire netting and secondary wire rope net in the first rubber concrete layer in the present invention；
Fig. 4 is grouting and reinforcing Deep Soft Rock Tunnel supporting sectional drawing in the present invention.
Embodiment
As Figure 1-4, deep tunnel wire rope net rubber concrete spraying support structure of the invention, including be arranged in
The twice pressure relief groove 2 of the both sides of roadway floor 1 and the wire rope net rubber concrete spray-up for being injected in roadway surrounding rock surface；Steel wire rope
The the first rubber concrete layer 3 and the second rubber that net rubber concrete spray-up includes being injected in deep laneway surrounding rock surface successively are mixed
Solidifying soil layer 4, the first rubber concrete layer 3 and the second rubber concrete layer 4 are made by rubber grain by incorporation concrete, with
The length direction in tunnel is its axial direction, using the peripheral direction in tunnel as its ring direction, with perpendicular to roadway surrounding rock surface
Direction be its radial direction, provided with some row's anchor metals layer in the rock stratum in tunnel-surrounding deep, some row's anchor metals layer
It is arranged side by side along the axial direction in tunnel, often arranging anchor metal layer includes some gold being evenly arranged along the ring direction in tunnel
Belong to anchor pole 5, radial direction of the every anchor metal 5 along tunnel is set, the anchor tail end of anchor metal 5 is fixed with and the by nut
One rubber concrete layer 3 compresses the pallet 6 of compacting, and the rubber concrete of pallet 6 and first layer 3 compresses compacting；Side by side adjacent two
Connected between the anchor tail end of root anchor metal 5 by main rope 7, king wire netting is formed between all main ropes 7, and
Connected between two adjacent main ropes 7 of row by secondary steel wire rope 8, secondary wire rope net is formed between all secondary steel wire ropes 8；
Twice pressure relief groove 2 is symmetricly set on the left and right sides of roadway floor 1.
The thickness of first rubber concrete layer 3 is 80mm, and the thickness of the second rubber concrete layer 4 is 120mm.
Spacing between the anchor tail end of two adjacent anchor metals 5 is 700mm, and anchor metal 5 is screw-thread steel, screw-thread steel
A diameter of 22mm, the length of screw-thread steel is 2400mm.
The cross sectional shape of pressure relief groove 2 is rectangle, and the width of the square-section of pressure relief groove 2 is 800mm, and depth is 2000mm.
The construction method of deep tunnel wire rope net rubber concrete spraying support structure, comprises the following steps：
（1）Roadway construction is carried out into lane using photoface exploision method, the rough section of Deep Soft Rock Tunnel is formed；
（2）Prepare rubber concrete：Junked tire is made to 0.9 ~ 2.0mm of diameter rubber grain, then by rubber grain
Mix in concrete admixture, as rubber concrete admixture；
（3）First injection rubber concrete is carried out to roadway surrounding rock, the first rubber concrete layer 3, the first rubber concrete is formed
The thickness of layer 3 is 80mm；
（4）Constructed successively 5 layers of anchor metal along the axial direction in tunnel：Bolthole is beaten along the radial direction in tunnel, then will tree
Fat Anchor Agent is put into anchor pole aperture, and anchor metal 5 and the Anchor Agent of front end are together sent into bolthole bottom simultaneously using jumbolter
Rotation, the body of rod of anchor metal 5 is anchored using resin anchoring agent, is installed the anchor tail end of anchor metal 5 by pallet 6 and is pressed on
On first rubber concrete layer 3；
（5）The anchor tail end of two adjacent side by side anchor metals 5 is connected by main rope 7, will simultaneously by secondary steel wire rope 8
Two adjacent main ropes 7 of row are connected, and circumferential direction of the which part pair steel wire rope 8 along tunnel is set, the secondary steel wire rope 8 in part
Set along the axial direction in tunnel；
（6）The second rubber concrete layer 4 is sprayed in the outer surface of the first rubber concrete layer 3, wherein the second rubber concrete layer 4
Thickness be 120mm；
（7）Dig out twice pressure relief groove 2：Along the axial direction in tunnel, dug out respectively using pneumatic pick in the left and right sides of bottom plate 1 in tunnel
The pressure relief groove 2 of one strip, pressure relief groove 2 is using the boundary line of the lateral wall of tunnel one as line of symmetry, and the cross section of pressure relief groove 2 is square
Shape, the wherein depth of the rectangular cross section of pressure relief groove 2 are 2000mm, and width is 800mm；
（8）After pressure relief groove 2 is excavated, roadway surrounding rock deforms, after country rock release in 10-15 days, mixed using common injection
Solidifying soil carries out Concrete Filled to twice pressure relief groove 2 and tamped；
（9）After the release of roadway floor 1, grouting and reinforcing is carried out to roadway surrounding rock and bottom plate 1 using hollow grouted anchor bar.
Step（9）In, it is to the grouting method of roadway surrounding rock using grouted anchor bar：
a）Shallow injected hole is beaten along the radial direction of roadway surrounding rock, the hole depth of shallow injected hole is 2000 ~ 2500mm, adjacent side by side
The spacing of two shallow injected holes is 1500mm, and shallow grouted anchor bar is inserted in shallow injected hole, and shallow grouted anchor bar is hollow structure,
A diameter of 22mm of shallow grouted anchor bar, length is 1800mm, and shallow-layer country rock note is carried out to shallow injected hole by shallow grouted anchor bar
Slurry；
b）Deep injected hole is beaten along the radial direction of roadway surrounding rock, the hole depth of deep injected hole is 2500 ~ 3500mm, adjacent side by side
The spacing of two deep injected holes is 1500mm, and deep grouted anchor bar is inserted in deep injected hole, and deep grouted anchor bar is hollow structure,
A diameter of 22mm of deep grouted anchor bar, length is 2200mm, and deep-level country rock note is carried out to deep injected hole by deep grouted anchor bar
Slurry.
The present embodiment not makees any formal limitation to shape, material, structure of the present invention etc., every according to this hair
Any simple modification, equivalent variations and modification that bright technical spirit is made to above example, belong to the technology of the present invention side
The protection domain of case.
Claims (6)
1. deep tunnel wire rope net rubber concrete spraying support structure, it is characterised in that：Including being arranged in roadway floor two
The twice pressure relief groove of side and the wire rope net rubber concrete spray-up for being injected in roadway surrounding rock surface；Wire rope net rubber concrete
Spray-up includes the first rubber concrete layer and the second rubber concrete layer for being injected in deep laneway surrounding rock surface successively, the first rubber
Glue concrete layer and the second rubber concrete layer by rubber grain by incorporation concrete be made, using the length direction in tunnel as
Its axial direction, using the peripheral direction in tunnel as its ring direction, using the direction perpendicular to roadway surrounding rock surface as its radial direction side
To, provided with some row's anchor metals layer in the rock stratum in tunnel-surrounding deep, axial direction of some row's anchor metal layers along tunnel
It is arranged side by side, often arranging anchor metal layer includes some anchor metals being evenly arranged along the ring direction in tunnel, every metal
Radial direction of the anchor pole along tunnel is set, and the anchor tail end of anchor metal is fixed with by nut to be laminated tightly with the first rubber concrete
The pallet of compacting；Connected side by side between the anchor tail end of two adjacent anchor metals by main rope, all main ropes
Between formed king wire netting, connected side by side between two adjacent main ropes by secondary steel wire rope, all secondary steel wire ropes
Between form secondary wire rope net；
Twice pressure relief groove is symmetricly set on the left and right sides of roadway floor.
2. deep tunnel wire rope net rubber concrete spraying support structure according to claim 1, it is characterised in that：The
The thickness of one rubber concrete layer is 80mm, and the thickness of the second rubber concrete layer is 120mm.
3. deep tunnel wire rope net rubber concrete spraying support structure according to claim 1, it is characterised in that：Phase
Spacing between the anchor tail end of two adjacent anchor metals is 700mm, and anchor metal is screw-thread steel, screw-thread steel it is a diameter of
22mm, the length of screw-thread steel is 2400mm.
4. deep tunnel wire rope net rubber concrete spraying support structure according to claim 1, it is characterised in that：Unload
The cross sectional shape of indent is rectangle, and the width of the square-section of pressure relief groove is 800mm, and depth is 2000mm.
5. the construction method of deep tunnel wire rope net rubber concrete spraying support structure according to claim 1, its
It is characterised by：Comprise the following steps：
（1）Roadway construction is carried out into lane using photoface exploision method, the rough section of Deep Soft Rock Tunnel is formed；
（2）Prepare rubber concrete：Junked tire is made to 0.9 ~ 2.0mm of diameter rubber grain, then by rubber grain
Mix in concrete admixture, as rubber concrete admixture；
（3）First injection rubber concrete is carried out to roadway surrounding rock, the first rubber concrete layer, the first rubber concrete layer is formed
Thickness be 80mm；
（4）Along the axial direction in tunnel construct successively anchor metal layer：Bolthole is beaten along the radial direction in tunnel, then by resin
Anchor Agent is put into anchor pole aperture, and anchor metal and the Anchor Agent of front end are together sent into bolthole bottom using jumbolter and revolved
Turn, the body of rod of anchor metal is anchored using resin anchoring agent, the anchor tail end of anchor metal is installed by pallet and is pressed on first
On rubber concrete layer；
（5）The anchor tail end of two adjacent side by side anchor metals is connected by main rope, will side by side by secondary steel wire rope
Adjacent two main ropes connection, circumferential direction of the which part pair steel wire rope along tunnel is set, and the secondary steel wire rope in part is along lane
The axial direction in road is set；
（6）The second rubber concrete layer is sprayed in the outer surface of the first rubber concrete layer, wherein the second rubber concrete layer
Thickness is 120mm；
（7）Dig out twice pressure relief groove：Along the axial direction in tunnel, using pneumatic pick one is dug out respectively in the bottom plate left and right sides in tunnel
The pressure relief groove of bar strip, pressure relief groove is using the boundary line of the lateral wall of tunnel one as line of symmetry, and the cross section of pressure relief groove is rectangle, wherein
The depth of the rectangular cross section of pressure relief groove is 2000mm, and width is 800mm；
（8）After pressure relief groove is excavated, roadway surrounding rock deforms, after country rock release in 10-15 days, utilizes common injection coagulation
Soil carries out Concrete Filled to twice pressure relief groove；
（9）After roadway floor release, grouting and reinforcing is carried out to roadway surrounding rock and bottom plate using hollow grouted anchor bar.
6. the construction method of deep tunnel wire rope net rubber concrete spraying support structure according to claim 5, its
It is characterised by：Step（9）In, it is to the grouting method of roadway surrounding rock using grouted anchor bar：
a）Shallow injected hole is beaten along the radial direction of roadway surrounding rock, the hole depth of shallow injected hole is 2000 ~ 2500mm, adjacent side by side
The spacing of two shallow injected holes is 1500mm；Shallow grouted anchor bar is inserted in shallow injected hole, shallow grouted anchor bar is hollow structure,
A diameter of 22mm of shallow grouted anchor bar, length is 1800mm, and shallow-layer country rock note is carried out to shallow injected hole by shallow grouted anchor bar
Slurry；
b）Deep injected hole is beaten along the radial direction of roadway surrounding rock, the hole depth of deep injected hole is 2500 ~ 3500mm, adjacent side by side
The spacing of two deep injected holes is 1500mm；Deep grouted anchor bar is inserted in deep injected hole, deep grouted anchor bar is hollow structure,
A diameter of 22mm of deep grouted anchor bar, length is 2200mm, and deep-level country rock note is carried out to deep injected hole by deep grouted anchor bar
Slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710635220.5A CN107246273B (en) | 2017-07-30 | 2017-07-30 | Deep roadway steel wire rope net rubber sprayed concrete supporting structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710635220.5A CN107246273B (en) | 2017-07-30 | 2017-07-30 | Deep roadway steel wire rope net rubber sprayed concrete supporting structure and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107246273A true CN107246273A (en) | 2017-10-13 |
| CN107246273B CN107246273B (en) | 2023-02-24 |
Family
ID=60012992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710635220.5A Active CN107246273B (en) | 2017-07-30 | 2017-07-30 | Deep roadway steel wire rope net rubber sprayed concrete supporting structure and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107246273B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316947A (en) * | 2017-12-22 | 2018-07-24 | 浙江交工集团股份有限公司 | A kind of tunnel structure being suitable for strong expansion potentiality fault belt |
| CN108595807A (en) * | 2018-04-15 | 2018-09-28 | 西安科技大学 | A kind of computational methods of roadway floor release well width |
| CN108979666A (en) * | 2018-07-11 | 2018-12-11 | 河北工程大学 | A kind of method of steel tube concrete pile control Floor Heave in Roadway |
| CN109320157A (en) * | 2018-09-13 | 2019-02-12 | 太原理工大学 | A kind of coal mine gob filling lotion and preparation method thereof for dividing material to prepare using waste tire of automobile |
| CN109404007A (en) * | 2018-11-22 | 2019-03-01 | 浙江大学 | A kind of underground engineering support antiknock integration composite construction |
| CN109578026A (en) * | 2018-11-02 | 2019-04-05 | 郑州工程技术学院 | Safeguard structure is supported for rock soil anchor |
| CN109765108A (en) * | 2019-01-22 | 2019-05-17 | 山东科技大学 | A kind of bolt-spary supports measure of merit device and method of assembly simulation country rock |
| CN109944619A (en) * | 2019-04-15 | 2019-06-28 | 辽宁工程技术大学 | A kind of Support Method for high ground stress soft rock stress tunnel |
| CN110159311A (en) * | 2019-06-20 | 2019-08-23 | 济宁学院 | A kind of roadway support concrete ejection anchor |
| CN112228101A (en) * | 2020-09-28 | 2021-01-15 | 中煤科工开采研究院有限公司 | Spraying-based roadway support forming method and system |
| CN113863951A (en) * | 2021-09-16 | 2021-12-31 | 平顶山天安煤业股份有限公司八矿 | Large-section roadway supporting technology based on stack dynamic pressure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR628983A (en) * | 1927-02-11 | 1927-11-02 | New pavement manufacturing process | |
| CN202787334U (en) * | 2012-07-16 | 2013-03-13 | 杭州萧宏建设集团有限公司 | Sealing structure of deep well casing used during tunnel construction |
| CN106401609A (en) * | 2016-11-10 | 2017-02-15 | 河南理工大学 | Bottom plate pressure relief and reinforcement structure for controlling floor heave of deep roadway and construction method of bottom plate pressure relief and reinforcement structure |
| CN106522991A (en) * | 2016-11-10 | 2017-03-22 | 河南理工大学 | Roadway anchoring and shotcreting support flexible integrated concrete spraying layer and construction method thereof |
-
2017
- 2017-07-30 CN CN201710635220.5A patent/CN107246273B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR628983A (en) * | 1927-02-11 | 1927-11-02 | New pavement manufacturing process | |
| CN202787334U (en) * | 2012-07-16 | 2013-03-13 | 杭州萧宏建设集团有限公司 | Sealing structure of deep well casing used during tunnel construction |
| CN106401609A (en) * | 2016-11-10 | 2017-02-15 | 河南理工大学 | Bottom plate pressure relief and reinforcement structure for controlling floor heave of deep roadway and construction method of bottom plate pressure relief and reinforcement structure |
| CN106522991A (en) * | 2016-11-10 | 2017-03-22 | 河南理工大学 | Roadway anchoring and shotcreting support flexible integrated concrete spraying layer and construction method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李大伟: "软岩巷道锚喷支护破坏分析与对策", 《河南理工大学学报(自然科学版)》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316947A (en) * | 2017-12-22 | 2018-07-24 | 浙江交工集团股份有限公司 | A kind of tunnel structure being suitable for strong expansion potentiality fault belt |
| CN108595807A (en) * | 2018-04-15 | 2018-09-28 | 西安科技大学 | A kind of computational methods of roadway floor release well width |
| CN108979666A (en) * | 2018-07-11 | 2018-12-11 | 河北工程大学 | A kind of method of steel tube concrete pile control Floor Heave in Roadway |
| CN108979666B (en) * | 2018-07-11 | 2024-04-02 | 河北工程大学 | Method for controlling tunnel floor heave by concrete filled steel tube pile |
| CN109320157A (en) * | 2018-09-13 | 2019-02-12 | 太原理工大学 | A kind of coal mine gob filling lotion and preparation method thereof for dividing material to prepare using waste tire of automobile |
| CN109320157B (en) * | 2018-09-13 | 2021-06-08 | 太原理工大学 | Coal mine goaf filling paste prepared from waste automobile tires by materials and preparation method thereof |
| CN109578026B (en) * | 2018-11-02 | 2023-10-10 | 郑州工程技术学院 | Supporting and protecting structure for rock and soil anchor rod |
| CN109578026A (en) * | 2018-11-02 | 2019-04-05 | 郑州工程技术学院 | Safeguard structure is supported for rock soil anchor |
| CN109404007A (en) * | 2018-11-22 | 2019-03-01 | 浙江大学 | A kind of underground engineering support antiknock integration composite construction |
| CN109765108A (en) * | 2019-01-22 | 2019-05-17 | 山东科技大学 | A kind of bolt-spary supports measure of merit device and method of assembly simulation country rock |
| CN109765108B (en) * | 2019-01-22 | 2024-05-07 | 山东科技大学 | Anchor spraying supporting effect testing device and method for combined body simulation surrounding rock |
| CN109944619A (en) * | 2019-04-15 | 2019-06-28 | 辽宁工程技术大学 | A kind of Support Method for high ground stress soft rock stress tunnel |
| CN110159311A (en) * | 2019-06-20 | 2019-08-23 | 济宁学院 | A kind of roadway support concrete ejection anchor |
| CN112228101B (en) * | 2020-09-28 | 2023-01-10 | 中煤科工开采研究院有限公司 | Roadway support forming method and system based on spraying |
| CN112228101A (en) * | 2020-09-28 | 2021-01-15 | 中煤科工开采研究院有限公司 | Spraying-based roadway support forming method and system |
| CN113863951B (en) * | 2021-09-16 | 2024-02-09 | 平顶山天安煤业股份有限公司八矿 | Large-section roadway support technology based on superposition dynamic pressing |
| CN113863951A (en) * | 2021-09-16 | 2021-12-31 | 平顶山天安煤业股份有限公司八矿 | Large-section roadway supporting technology based on stack dynamic pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107246273B (en) | 2023-02-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107246273A (en) | Deep tunnel wire rope net rubber concrete spraying support structure and its construction method | |
| CN207261019U (en) | Deep Soft Rock Tunnel double-layer rubber gunite concrete sprinkler body supporting construction | |
| CN102493821B (en) | Support method for high stress roadway coal-rock mass | |
| CN104389628B (en) | Landslide location tunnel reinforcement device and reinforced construction method | |
| CN103410161B (en) | Oblique control slip casting steel anchor tube framework and construction method thereof | |
| CN102562093B (en) | Full-length anchoring supporting method with intensive resin anchor rod and anchor-shotcrete net | |
| CN105178981A (en) | Total-section closed type deep-shallow coupling yielding, bolting-grouting and supporting method for incompact and fractured soft-rock roadway | |
| CN101338679B (en) | Deep well great section loose wall rock laneway support method | |
| CN103321653B (en) | Method of treating lining after collapse of underground cavern crown | |
| CN111119935B (en) | Multi-layer grouting reinforcement method for surrounding rock of soft and broken roadway structure | |
| CN101967984A (en) | Deep well tunnel cable anchor rigid-flexible coupling support and surrounding rock overall reinforced support method | |
| CN2878511Y (en) | Tensile compression combined self-anchored rock anchor rod | |
| CN106321119A (en) | Double-layer anchor net cable supporting structure for controlling mining roadway surrounding rock deformation and method thereof | |
| CN108194100A (en) | A kind of accurate three-dimensional prestress strengthening method of crack coal and rock | |
| CN103603675A (en) | Supporting method of permeable soft broken rock stratum roadway | |
| CN109736850B (en) | Roadway shell and arch combined strong bearing structure and construction method thereof | |
| CN110905555A (en) | UHPC lining structure for tunnel and construction method thereof | |
| CN104895581A (en) | Tunnel lining rapid repair structure based on carbon fiber woven mesh and repair method thereof | |
| CN203321531U (en) | Lining processing structure for underground cavern after collapse of top arch | |
| CN206205915U (en) | A kind of flexible entirety concrete spray-up structure of deep tunnel bolt-spary supports | |
| CN106522991B (en) | Roadway anchor-shotcrete support flexible integral concrete shotcrete layer and construction method thereof | |
| CN105350993B (en) | A kind of roadway full-fracture-surfacanchoring-rod anchor cable beam spray Combined Support Technology | |
| CN101235721A (en) | Reasonable replacement homogeneous wall rock soft rock laneway support construction technology | |
| CN104453914B (en) | The construction method of ingate anti-impact shock-absorbing supporting construction | |
| CN205012333U (en) | Recoverable FRP stock with enlarged footing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |