CN108590713A - A kind of Tunnel Passing cavity canopy protection structure and method for protecting support - Google Patents
A kind of Tunnel Passing cavity canopy protection structure and method for protecting support Download PDFInfo
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- CN108590713A CN108590713A CN201810602200.2A CN201810602200A CN108590713A CN 108590713 A CN108590713 A CN 108590713A CN 201810602200 A CN201810602200 A CN 201810602200A CN 108590713 A CN108590713 A CN 108590713A
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- Prior art keywords
- protection structure
- canopy
- pipe
- steel
- canopy protection
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
Abstract
The invention discloses a kind of Tunnel Passing cavity canopy protection structure and method for protecting support, belong to engineering construction technology field.The structure includes canopy protection structure operating room (1), it is oriented to wall (2), canopy protection structure steel pipe (3), reinforced mesh (4), shaped steel arch (5), wing plate (6) and orientation filling system (7).When Tunnel Passing cavity, and when empty bigger, in order to save construction time and operating expenses, ensure construction safety and construction quality, it devises and passes through empty canopy protection structure and method for protecting support, include mainly supporting and protection two parts, retaining portion includes pipe canopy and arch, and guard section is to increase protection wing plate on pipe booth structure to form tunnel structure protective layer, the height for the Level Change wing plate that can be pushed up according to hole, overcoat thickness is adjusted, hole roof fall stone is effectively prevented, the safety accidents such as cave in.
Description
Technical field
Canopy protection structure and method for protecting support when the present invention is a kind of Tunnel Passing cavity are a kind of tunnel canopy protection structure and branch
Maintaining method belongs to engineering construction technology field.
Background technology
It is encountered in constructing tunnel when passing through the unfavorable geological conditions such as cavity, due to the complexity and not really of its geological conditions
It is qualitative etc., it is be easy to cause tunnel cave, the engineering accidents such as chip off-falling generally use back-pressure to avoid engineering accident and quality problems
Backfill method is constructed, and the duration is delayed, and country rock generates moderate finite deformation, influences construction safety, causes bigger economic waste.
Invention content
The present invention is a kind of Tunnel Passing cavity canopy protection structure and method for protecting support, and when Tunnel Passing cavity, and cavity is relatively
When big, in order to save construction time and operating expenses, ensure construction safety and construction quality, devise and pass through empty canopy protection structure
And method for protecting support, include mainly supporting and protection two parts, retaining portion includes pipe canopy and arch, and guard section is in pipe canopy knot
Increase protection wing plate on structure and forms tunnel structure protective layer, the height for the Level Change wing plate that can be pushed up according to hole, adjustment protection
Layer thickness effectively prevents hole roof fall stone, the safety accidents such as cave in.
In the technical solution adopted by the present invention, a kind of Tunnel Passing cavity canopy protection structure, the structure includes canopy protection structure work
Make room (1), is oriented to wall (2), canopy protection structure steel pipe (3), reinforced mesh (4), shaped steel arch (5), wing plate (6) and orientation slip casting system
It unites (7).
Canopy protection structure operating room (1) is made of first circulation pipe canopy (8) and second circulation pipe canopy (9), first circulation pipe canopy
(8) and second circulation pipe canopy (9) interlaced arrangement it, is equipped between first circulation pipe canopy (8) and second circulation pipe canopy (9) and is oriented to wall
(2)；Canopy protection structure steel pipe (3) is arranged at the top of canopy protection structure operating room (1), and reinforced mesh (4) is laid on canopy protection structure work
Make on room (1)；Shaped steel arch (5) setting is arranged in the bottom of canopy protection structure steel pipe (3), wing plate (6) in canopy protection structure steel pipe (3)
Outside, orientation filling system (7) be arranged at the mounting hole of canopy protection structure steel pipe (3).Canopy protection structure steel pipe (3), bar-mat reinforcement
Piece (4) and wing plate (6) form guard section, wing plate (6) it is height-adjustable, canopy protection structure steel pipe (3) and shaped steel arch (5) are
The retaining portion of canopy protection structure.
Longitudinally connected reinforcing bar (14) is equipped between shaped steel arch (5).
Canopy protection structure steel pipe (3) and the outer limb α being oriented between wall (2) are determined according to canopy protection structure length, are 1 °~3 °.
Canopy protection structure operating room (1) is the work-yard that canopy protection structure performs, including excavates operating room and first supporting.First
In a certain range of tunnel tunnel face arch (including canopy protection structure vault and canopy protection structure haunch), tunnel tunnel face is excavating ratio just
Normal tunnel diameter extends out certain distance D, D and two times of first lining thickness, operating room's excavation length is taken often to save long determination according to steel pipe,
The steel arch-shelf of canopy protection structure operating room (1) is installed, and excavate the first supporting of operating room, is formed canopy protection structure operating room (1).
It is oriented to the arch wall that wall (2) is guide tunnel direction, be oriented to pre-buried canopy protection structure guide pipe in wall (2) and is oriented to steel
Frame, guide pipe and guiding steelframe are equipped with wing plate hole simultaneously, and wing plate hole is oriented as winged plate penstock installation.It is oriented to first when wall performs
Vertical arch and template, installation is oriented to steelframe and guide pipe, Reperfu- sion concrete are formed.To ensure canopy protection structure construction precision, lead
I-steel is set into wall (2), steelframe peripheral hardware is oriented to steel pipe, and steel pipe is along the reserved guiding wing plate jack in pipe canopy exterior normal direction, width
It is determined by numerical computations according to empty size with height, is oriented to steel pipe there are a certain range of outer limb α, steel pipe is welded with steelframe
It connects.Steelframe each unit is by connecting plate welding fabrication, by being bolted between unit.
Canopy protection structure steel pipe (3) use caliber forSeamless steel pipe,For 89~150mm, according to canopy protect section length and
Construction technology determines that circumferential spacing is with the caliber no more than 3-5 times.When needing to increase the strength and stiffness of steel pipe, in pipe
Setting steel reinforcement cage is then filled with cement mortar, the intensity of reinforcement canopy pipe.
Reinforced mesh (4) is laid on the outside of canopy protection structure, is welded on canopy protection structure steel pipe (3), rise fixed steel pipe and
Carry out concrete spray shield effect.Reinforced mesh (4) uses round steel, spacing to be determined as 5cm × 15cm, reinforcing bar according to the size of arch
Net single installation at the scene.Reinforced mesh (4) is connected firmly with canopy protection structure steel pipe (3), is laid with the fluctuating of spray plane.Reinforcing bar
It is overlapped securely between mesh sheet (4) and with the bar-mat reinforcement for having sprayed concrete section, and the lap of splice is not less than A (A is generally 200mm).Reinforcing bar
Mesh sheet (4) need to be affiliated to securely, and in gunite concrete, bar-mat reinforcement must not shake.The position demarcated by drawing when linked network hangs processing
Good reinforced mesh (4), reinforced mesh (4) are laid with the fluctuating of first spray plane, the canopy protection structure steel that banding fixed is constructed early period
On pipe, then reinforced mesh (4) welded together, reinforced mesh (4) lap of splice is 1~2 grid.
Its effect of shaped steel arch (5) is that strata pressure and constraint change are undertaken before gunite concrete is not up to desired strength
Shape improves the ability of just supporting, it is both temporary support and a part for permanent support.Shaped steel arch (5) uses I-steel,
It is welded to connect steel plate at per Pin I-steel two ends, bracing members are all made of two-sided welding.The steel arch-shelf processed is in smooth field
It is assembled to carry out examination on the ground, control plane warpage should be less than B (B is generally 5mm), periphery assembly tolerance be C (C generally takes ±
30mm).It is tethered and is connect with flange valve snail between steel arch-shelf and steel arch-shelf, and the junction of the edges of two sheets of paper welds, it is longitudinal that bar connecting, circumferential direction is used to use
Dowel is attached, and welding uses welding by both sides, it is ensured that and it is longitudinally connected to be connected firmly with arch, it constitutes whole.Steel arch-shelf is bent
It is bent using forming mill, shaped steel connection can be used steel plate and tie up a full weld, should first expire shaped steel butt welding before tying up item weldering, it is ensured that wait strong
Connection.Junction steel plate thickness, size, jewel hole have to comply with requirement, and all throat depths cannot be less than design thickness, and weld seam is full
It is full.Bracing members should be welded with anchor pole head and bar-mat reinforcement as far as possible, to reinforce its combined supporting effect.
Wing plate (6) is made using seamless steel plate, is welded on the steel pipe of canopy protection structure, is oriented parallel to tunneling method
Line, the length of wing plate is identical as often section length of steel pipe, and the thickness of wing plate is determined by the distance from top of cavity top to canopy protection structure,
The height of wing plate is obtained according to the size and height of cavity by dynamics calculation.
It includes slurries vectored injection system and purpose monitoring system to orient filling system (7).Slurries vectored injection system packet
Include drilling tool and grouting port (7.1.1), high-pressure slip-casting pipe (7.1.2) and slurry injection nozzle (7.1.3)；
Purpose monitoring system, including terminal (7.2.2), data line (7.2.1), tool joint (7.2.3),
Bar (7.2.4) is detected, end (7.2.5) and pressure sensor (7.2.6) are detected；Terminal (7.2.2) passes through data
Transmission line (7.2.1) is connect with pressure sensor (7.2.6), and pressure sensor (7.2.6) is laid in high-pressure slip-casting pipe (7.1.2)
On, drilling tool and grouting port (7.1.1) are arranged at the center of drilling, drilling tool and grouting port (7.1.1) and high-pressure slip-casting pipe
(7.1.2) is connected, and slurry injection nozzle (7.1.3) is arranged on high-pressure slip-casting pipe (7.1.2)；
Tool joint (7.2.3), detection bar (7.2.4) and detection end (7.2.5) are sequentially connected with composition detecting structure, visit
Parallel arrangement ensures slip casting orientation, tool joint (7.2.3) and drilling tool and slip casting to geodesic structure vertically with high-pressure slip-casting pipe (7.1.2)
The position of mouth (7.1.1) is corresponding.
High-pressure slip-casting pipe (7.1.2) is glass reinforced plastic pipe.
Slurries vectored injection system will be prepared slurries by drilling tool and grouting port (7.1.1) by design requirement and inject high pressure
In Grouting Pipe (7.1.2), slurries under pressure, are sprayed by the slurry injection nozzle (7.1.3) of high-pressure slip-casting pipe (7.1.2) tube wall
To between the wing plate (6) and bed die shaped steel (11) of canopy protection structure and solidifying, is formed and consolidate protective layer.
Purpose monitoring system, including terminal (7.2.2), data line (7.2.1), detection bar (7.2.4), are visited
End (7.2.5) and pressure sensor (7.2.6) are surveyed, protective layer and high pressure are reinforced for that can be monitored in real time in slip casting
Interlayer pressure between Grouting Pipe (7.1.2) and slip casting overpressure adjust slip casting pressure at any time according to gathered data situation of change
Power, grouting amount parameter.
When canopy protection structure passes through no charges cavern, backform shaped steel (10) is arranged at the top of canopy protection structure steel pipe (3),
The effect of wing plate be in canopy protection structure slip casting, slurries by wing plate of the reserved injected hole at the top of canopy protection structure on steel pipe it
Between form firm protective layer (12), the thickness of protective layer (12) is determined by the height of wing plate, bed die shaped steel (11) be arranged in type
The bottom of steel arch-shelf (5), backform shaped steel (10) and bed die shaped steel (11) are arranged symmetrically along tunnel center line (13).
Protective layer (12) refers in canopy protection structure slip casting, and slurries are by the reserved injected hole on steel pipe on canopy protection structure top
Firm protective layer is formed between the wing plate in portion.The thickness of protective layer (12) depends on the height of wing plate, and the height of wing plate can root
Determine that the height that hole is lifted off the more big then wing plate of distance of pipe canopy is also bigger, instead to the vertical distance of pipe canopy according to the top in cavity
It is as the same.
It is provided by the present invention to pass through empty canopy protection structure and method for protecting support, it has the following advantages：
The present invention can adjust wing plate height, and then change the thickness of structure protective layer according to empty hole heights of roofs, to
The stability of effective guarantee canopy protection structure.And slip casting and monitoring system are oriented, it can be monitored in real time in slip casting and be reinforced protection
Interlayer pressure between layer and Grouting Pipe and slip casting overpressure, achieve the purpose that monitor in real time, and can ensure that slip casting is imitated
Fruit, without there is a phenomenon where excessive slip casting or falling flat.In addition to this, the present invention effectively inhibits in construction
The airborne dust that site operation generates selects noise devices to construct, and noise is greatly controlled, and shunts rainwater, and engineering is dirty
Water mitigates influence of the sewage discharge to environment, has environmentally protective construction concept.
Description of the drawings
Fig. 1 canopy protection structures pass through no charges macroscopic-void skiagraph.
Canopy protection structure steel pipe section artworks of the Fig. 2 with wing plate.
Connection diagrams of the Fig. 3 between canopy protection structure steel pipe, reinforced mesh and wing plate.
Connection diagrams of the Fig. 4 between filling system and shaped steel arch.
Fig. 5 canopy protection structures construction orientation filling system schematic diagram.
Fig. 6 is that canopy protection structure passes through no charges cavern cross-sectional view.
Specific implementation mode
The specific embodiment of the invention is illustrated in conjunction with attached drawing, attached drawing is schematic diagram, is only said in a schematic way
Bright this patent basic structure, based on the embodiment of the present invention, those skilled in that art are not making creative work premise
Lower obtained every other embodiment, all belongs to the scope of protection of the present invention.
A kind of method for protecting support of Tunnel Passing cavity canopy protection structure, this method are as follows：
S1 is oriented to wall construction：(a) according to tunnel axis and excavation contour line, two Pin of installation are oriented to wall shaped steel arch, two Pin
The spacing being oriented between wall shaped steel arch is 60cm, firm welding.(b) positioned with total powerstation, installation canopy protection structure guide pipe and
It is oriented to steelframe, canopy protection structure guide pipe is that 140 wall thickness of Ф is 5mm steel pipes, the method outside canopy protection structure above canopy protection structure guide pipe
Line direction is reserved to be oriented to wing plate jack, and width 2cm, height 3m are (according to numerical result, the concrete cover of cover arch of tunnel
Thickness is determined as 3m), it checks the guide pipe gradient with slope ruler, is accurately positioned according to 1~3 ° of outer limb, connection reinforcing bar and type is used in combination
Steel arch-shelf is securely welded as a whole.(c) after canopy protection structure guide pipe and leading truck meet required precision after testing, internal model is installed
Arch, internal model arch are formed with two Pin section steel manufactures, and after support is firm, outboard template is installed on the outside of internal model arch.(d) it pours
It is oriented to wall, wall is oriented to and uses C25 concretings, sectional dimension 2.0m × (1+3) m.(e) after the completion of guiding wall pours, injection
Slope surface is faced upward around the closing of 15cm thickness C25 concretes, wall for grouting when as slip casting.(f) outer side mold is removed after concrete strength satisfaction
Plate.
S2 canopy pipes make and installation：(a) canopy protection structure steel pipe uses outer diameter 108mm, on the hot rolled seamless steel tube of wall thickness 6mm
Wing plate is welded, overall length 30m (length of steel pipe can also determine according to cyclic advance length scene, but section length is no more than 50m) divides
Section connection, every section of 3m long with screwed connection, nozzle screw thread vehicle depth are 6cm female threads at pipe orifice joint, and connecting tube uses Φ 127
× 8mm seamless steel pipes, the long 12cm of pin thread.1m is reserved as only slurry section in canopy pipe tail portion, and slip casting is played at remaining position of canopy protection structure steel pipe
Hole, injected hole aperture 16mm, injected hole pitch of holes 15cm, quincuncial arrangement.(b) loading machine jacking canopy under hand fit is used to protect
Structured steel pipe, be staggered before and after the connector of adjacent canopy protection structure steel pipe 1.5m, is mounted on after first steel pipe welding upper flange and is oriented to wall
On, later section canopy protection structure steel pipe is manually loaded onto, chain wrench is manually held and carries out the connection of canopy protection structure steel pipe, make two section canopy protection structure steel
Pipe joins together in connection place, then welds guide pipe wing plate, heads into successively.(c) when canopy pipe is installed, 3m canopy protection structure steel is often installed
Pipe performs five Pin shaped steel archs, and shaped steel arch is equipped with canopy pipe limiter, with to the positioning of canopy protection structure steel pipe and supporting.Successively
Piecemeal erection canopy protection structure steel pipe and shaped steel arch.
S3 shaped steel archs make and installation：(a) I-steel arch uses 20b i shaped steels, per Pin i shaped steel two ends
The junction steel plate of 220 × 220 × 10mm of place's welding, bracing members are all made of two-sided welding, and throat thickness is not less than 5mm, finishing type
The processing of steel arch-shelf.The shaped steel arch processed carries out examination assembly on smooth place, and control plane warpage is less than 20mm, week
Assembly tolerance in side is ± 30mm.Check whether solder joint meets code requirement, if solder skip；It is satisfactory to number, it keeps away
Exempt to use with.(b) it is tethered and is connect with flange valve snail between steel arch-shelf and shaped steel arch, and the junction of the edges of two sheets of paper welds, longitudinal steel for using Φ 22mm
Muscle connects, spacing 60cm, and circumferential direction is attached using the dowel of 1m, and welding uses welding by both sides, it is ensured that longitudinally connected and type
Steel arch-shelf is connected firmly, and constitutes whole.(c) shaped steel arch is bent is bent using forming mill, shaped steel connection use 20cm*h (h for
Shaped steel height subtracts 4cm) thickness 1cm steel plates tie up a full weld, first shaped steel butt welding should be expired before tying up item weldering, it is ensured that wait strong ties.Even
It connects steel plate thickness, size, jewel hole and has to comply with requirement, all throat depths cannot be less than design thickness, and weld seam is full.Steel branch
Support is welded with anchor pole head and bar-mat reinforcement, to reinforce its combined supporting effect.
The making and installation of S4 reinforced mesh：(a) it is 5cm × 15cm, bar-mat reinforcement that reinforced mesh, which uses 6 round steel of Φ, spacing,
Single installation at the scene.Reinforced mesh couples securely with steel pipe, is laid with the fluctuating of spray plane.Between bar-mat reinforcement and with sprayed concrete
The bar-mat reinforcement overlap joint of section is secured, and the lap of splice is not less than 200mm.Bar-mat reinforcement need to be affiliated to securely, the reinforcing bar in gunite concrete
Net must not shake.(b) before reinforcement welding will first by the oil stain of rebar surface, paint is dirty, cement mortar and pounding with a hammer can peel off floats
Skin, iron rust etc. are removed totally；Reinforced mesh after completion of processing answers smooth, scar of the rebar surface without weakening steel area.
(c) reinforced mesh processed is hung by the position of drawing calibration when linked network, reinforced mesh is laid with the fluctuating of first spray plane, binding
It is fixed on the pipe boron steel pipe constructed in advance, then reinforced mesh is welded together, the lap of splice between reinforced mesh is 1
~2 grids.
S5 fabrication of reinforcing cage and installation：To increase the bending resistance and impact resistance of canopy protection structure, steel is set in steel pipe
Muscle cage carries out reinforcement to structure, is made of four Φ 22mm reinforcing bars and fixed ring, with loading machine jacking under hand fit.
S6 slip castings and protective layer construction：(a) face must first element one layer concrete of spray be as wall for grouting before slip casting, to the palm
It is closed in sub- face, it is ensured that slip casting process not spillage；Tube shed grouting mode uses intermittent slip casting, i.e. a machine holes to change hole note
Slurry.(b) slip casting carries out canopy protection structure using orientation filling system, including slurries vectored injection system and purpose monitoring system
Orient slip casting and monitoring.(c) intermittent time cannot be more than 1.5 hours, allow slurries to have certain setting time, prevent continuous grouting
Slurry is spread without limitation.(d) grouting sequence is first low holes Kong Hougao, and water hole is marked with after first noting no water hole, from two arch springings to
Vault symmetrically carries out.(e) slip casting standard is that tunnel structure protective layer thickness meets design requirement, and single-pipe grouting amount reaches and sets
Evaluation or grouting pressure reach final pressure and voltage stabilizing 20 minutes or more, no longer can stop slip casting into slurry in hole.(f) slip casting terminates
It closes grouting stop-valve in time afterwards, checks that aperture, adjacent hole, whether there is or not grout leaking phenomenons at coating relatively thin position during slip casting, as gone here and there
Slurry, stops the hole slip casting immediately, and grout leaking mouth is blocked using intermittent slip casting, is spaced a hole or number hole slip casting, or using the dimity, wood
Wedge, quick-hardening cement mortar or Anchor Agent block, and slip casting is further continued for when no longer grout leaking, and pressure such as rises suddenly during slip casting
Height may then occur plugging, answer shutdown inspection.
S7 cycle constructions：It is that (cyclic advance can be determined by scene, but divided a cyclic advance unit with every inside propulsion 30m
Segment length is no more than 50m), longitudinal two groups of canopy protection structures cycle lap of splice is not less than 3.0m, until being fully completed end.
Claims (6)
1. a kind of Tunnel Passing cavity canopy protection structure, it is characterised in that：The structure includes canopy protection structure operating room (1), is oriented to wall
(2), canopy protection structure steel pipe (3), reinforced mesh (4), shaped steel arch (5), wing plate (6) and orientation filling system (7)；
Canopy protection structure operating room (1) is made of first circulation pipe canopy (8) and second circulation pipe canopy (9), first circulation pipe canopy (8) and
Second circulation pipe canopy (9) interlaced arrangement is equipped between first circulation pipe canopy (8) and second circulation pipe canopy (9) and is oriented to wall (2)；Canopy
Protection structure steel pipe (3) is arranged at the top of canopy protection structure operating room (1), and reinforced mesh (4) is laid on canopy protection structure operating room (1)
On；In the bottom of canopy protection structure steel pipe (3), wing plate (6) is arranged in the outside of canopy protection structure steel pipe (3) for shaped steel arch (5) setting,
Filling system (7) is oriented to be arranged at the mounting hole of canopy protection structure steel pipe (3)；Canopy protection structure steel pipe (3), reinforced mesh (4) and
Wing plate (6) forms guard section, wing plate (6) it is height-adjustable, canopy protection structure steel pipe (3) and shaped steel arch (5) are that canopy shield is tied
The retaining portion of structure；
It includes slurries vectored injection system and purpose monitoring system to orient filling system (7)；Slurries vectored injection system includes boring
Tool and grouting port (7.1.1), high-pressure slip-casting pipe (7.1.2) and slurry injection nozzle (7.1.3)；
Purpose monitoring system, including terminal (7.2.2), data line (7.2.1), tool joint (7.2.3), detection
Bar (7.2.4) detects end (7.2.5) and pressure sensor (7.2.6)；Terminal (7.2.2) passes through data transmission
Line (7.2.1) is connect with pressure sensor (7.2.6), and pressure sensor (7.2.6) is laid on high-pressure slip-casting pipe (7.1.2),
Drilling tool and grouting port (7.1.1) are arranged at the center of drilling, drilling tool and grouting port (7.1.1) and high-pressure slip-casting pipe (7.1.2)
Connection, slurry injection nozzle (7.1.3) are arranged on high-pressure slip-casting pipe (7.1.2)；
Tool joint (7.2.3), detection bar (7.2.4) and detection end (7.2.5) are sequentially connected with composition detecting structure, detection knot
Parallel arrangement ensures slip casting orientation, tool joint (7.2.3) and drilling tool and grouting port to structure vertically with high-pressure slip-casting pipe (7.1.2)
The position of (7.1.1) is corresponding.
2. a kind of Tunnel Passing cavity canopy protection structure according to claim 1, it is characterised in that：Between shaped steel arch (5)
Equipped with longitudinally connected reinforcing bar (14).
3. a kind of Tunnel Passing cavity canopy protection structure according to claim 1, it is characterised in that：Canopy protection structure steel pipe (3)
It is determined according to canopy protection structure length with the outer limb α being oriented between wall (2), is 1 °~3 °.
4. a kind of Tunnel Passing cavity canopy protection structure according to claim 1, it is characterised in that：High-pressure slip-casting pipe
(7.1.2) is glass reinforced plastic pipe.
5. a kind of Tunnel Passing cavity canopy protection structure according to claim 1, it is characterised in that：Canopy protection structure passes through nothing and fills
When filling out object cavern, backform shaped steel (10) setting in the top of canopy protection structure steel pipe (3), the effect of wing plate is noted in canopy protection structure
When slurry, slurries form firm protective layer (12) by the reserved injected hole on steel pipe between the wing plate at the top of canopy protection structure,
The thickness of protective layer (12) is determined that bed die shaped steel (11) is arranged in the bottom of shaped steel arch (5), backform shaped steel by the height of wing plate
(10) it is arranged symmetrically along tunnel center line (13) with bed die shaped steel (11).
6. a kind of method for protecting support of Tunnel Passing cavity canopy protection structure, this method are as follows：
S1 is oriented to wall construction：(a) according to tunnel axis and excavation contour line, two Pin of installation are oriented to wall shaped steel arch, and two Pin are oriented to
Spacing between wall shaped steel arch is 60cm, firm welding；(b) it is positioned with total powerstation, canopy protection structure guide pipe and guiding is installed
Steelframe, canopy protection structure guide pipe are that 140 wall thickness of Ф is 5mm steel pipes, the canopy protection structure exterior normal side above canopy protection structure guide pipe
To reserved guiding wing plate jack, width 2cm, height 3m check the guide pipe gradient with slope ruler, accurate according to 1~3 ° of outer limb
Positioning is used in combination connection reinforcing bar to be securely welded as a whole with shaped steel arch；(c) canopy protection structure guide pipe and leading truck are full after testing
After sufficient required precision, internal model arch is installed, internal model arch is formed with two Pin section steel manufactures, after support is firm, in outside internal model arch
Install outboard template in side；(d) guiding wall is poured, wall is oriented to and uses C25 concretings, sectional dimension 2.0m × (1+3) m；(e)
After the completion of guiding wall pours, slope surface is faced upward around injection 15cm thickness C25 concretes closing, wall for grouting when as slip casting；(f) concrete is waited for
Intensity removes outboard template after meeting；
S2 canopy pipes make and installation：(a) canopy protection structure steel pipe uses outer diameter 108mm, is welded on the hot rolled seamless steel tube of wall thickness 6mm
Wing plate, overall length 30m, segmentation connection, every section of 3m long with screwed connection, nozzle screw thread vehicle depth are 6cm female threads at pipe orifice joint,
Connecting tube uses Φ 127 × 8mm seamless steel pipes, the long 12cm of pin thread；1m is reserved as only slurry section, canopy protection structure steel pipe in canopy pipe tail portion
Injected hole, injected hole aperture 16mm, injected hole pitch of holes 15cm, quincuncial arrangement are beaten in remaining position；(b) use loading machine artificial
Coordinate lower jacking canopy protection structure steel pipe, be staggered 1.5m before and after the connector of adjacent canopy protection structure steel pipe, first steel pipe welding upper flange
It is mounted on and is oriented on wall afterwards, manually load onto later section canopy protection structure steel pipe, manually hold chain wrench and carry out the connection of canopy protection structure steel pipe, make
Two section canopy protection structure steel pipes join together in connection place, then weld guide pipe wing plate, head into successively；(c) when canopy pipe is installed, often pacify
3m canopy protection structure steel pipes are filled, five Pin shaped steel archs are performed, shaped steel arch is equipped with canopy pipe limiter, with fixed to canopy protection structure steel pipe
Position and supporting；Piecemeal erection canopy protection structure steel pipe and shaped steel arch successively；
S3 shaped steel archs make and installation：(a) I-steel arch uses 20b i shaped steels, is welded at every Pin i shaped steel two ends
The junction steel plate of 220 × 220 × 10mm is connect, bracing members are all made of two-sided welding, and throat thickness is not less than 5mm, finishing type steel arch
The processing of frame；The shaped steel arch processed carries out examination assembly on smooth place, and control plane warpage is less than 20mm, and periphery is spelled
Dress tolerance is ± 30mm；Check whether solder joint meets code requirement, if solder skip；It is satisfactory to number, it avoids mixing
With；(b) it is tethered and is connect with flange valve snail between steel arch-shelf and shaped steel arch, and the junction of the edges of two sheets of paper welds, longitudinal reinforcing bar using Φ 22mm connects
It connects, spacing 60cm, circumferential direction is attached using the dowel of 1m, and welding uses welding by both sides, it is ensured that longitudinally connected to encircle with shaped steel
Frame is connected firmly, and constitutes whole；(c) shaped steel arch is bent is bent using forming mill, and shaped steel connection uses 20cm*h thickness 1cm steel
Plate ties up a full weld, and h is that shaped steel height subtracts 4cm；First shaped steel butt welding should be expired before tying up item weldering, it is ensured that wait strong ties；Junction steel plate
Thickness, size, jewel hole have to comply with requirement, and all throat depths cannot be less than design thickness, and weld seam is full；Bracing members and anchor
Head and bar-mat reinforcement welding, with the supporting effect that cements union；
The making and installation of S4 reinforced mesh：(a) it is 5cm × 15cm that reinforced mesh, which uses 6 round steel of Φ, spacing, and bar-mat reinforcement is existing
The single installation in field；Reinforced mesh couples securely with steel pipe, is laid with the fluctuating of spray plane；Between bar-mat reinforcement and with sprayed concrete section
Bar-mat reinforcement overlap joint is secured, and the lap of splice is not less than 200mm；Bar-mat reinforcement need to be affiliated to securely, and in gunite concrete, bar-mat reinforcement is not
It must shake；It (b) will be first by the oil stain of rebar surface, paint dirt, cement mortar and outer skin, the iron that can be peeled off that pounds with a hammer before reinforcement welding
Rust is removed clean；Reinforced mesh after completion of processing answers smooth, scar of the rebar surface without weakening steel area；(c) linked network
When by the position of drawing calibration hang the reinforced mesh processed, reinforced mesh is laid with the fluctuating of first spray plane, banding fixed in
On the pipe boron steel pipe constructed in advance, then reinforced mesh welded together, the lap of splice between reinforced mesh is 1~2
Grid；
S5 fabrication of reinforcing cage and installation：To increase the bending resistance and impact resistance of canopy protection structure, steel reinforcement cage is set in steel pipe
Reinforcement is carried out to structure, is made of four Φ 22mm reinforcing bars and fixed ring, with loading machine jacking under hand fit；
S6 slip castings and protective layer construction：(a) face first must spray a layer concrete as wall for grouting, to face by element before slip casting
It is closed, it is ensured that slip casting process not spillage；Tube shed grouting mode uses intermittent slip casting, i.e. a machine holes to change hole slip casting；(b)
Slip casting is oriented note using orientation filling system, including slurries vectored injection system and purpose monitoring system to canopy protection structure
Slurry and monitoring；(c) intermittent time cannot be more than 1.5 hours, and slurries is allowed to have certain setting time, prevent continuous grouting process from starching
Liquid is spread without limitation；(d) grouting sequence is first low holes Kong Hougao, and water hole is marked with after first noting no water hole, from two arch springings to vault pair
Claim to carry out；(e) slip casting standard is that tunnel structure protective layer thickness meets design requirement, and single-pipe grouting amount reach design value or
Grouting pressure reaches final pressure and voltage stabilizing 20 minutes or more, no longer stops slip casting into slurry in hole；(f) it is closed in time after slip casting
Grouting stop-valve checks that whether there is or not grout leaking phenomenons for aperture, adjacent hole, the relatively thin position of coating, grout leaking such as occurs, stops immediately during slip casting
The hole slip casting blocks grout leaking mouth using intermittent slip casting, is spaced a hole or number hole slip casting, or using the dimity, timber wedge, quick-hardening cement
Mortar or Anchor Agent block, and slip casting is further continued for when no longer grout leaking, and pressure such as increases suddenly during slip casting, then may generation
Plugging, shutdown inspection；
S7 cycle constructions：With every inside propulsion 30m for a cyclic advance unit, longitudinal two groups of canopy protection structures cycle lap of splice is not
Less than 3.0m, until being fully completed end.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630282A (en) * | 2019-09-02 | 2019-12-31 | 中铁十八局集团有限公司 | Double-track railway tunnel weak surrounding rock advanced reinforcement simple pipe shed room |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050019580A (en) * | 2003-08-20 | 2005-03-03 | 주식회사 우지스 | The waterproofing air-bubbles grouting method of construction for tunnel hollow filling |
| CN102182471A (en) * | 2011-03-23 | 2011-09-14 | 彬县水帘洞煤炭有限责任公司 | Advance support method for coal mine tunnel high-risk area |
| KR101244257B1 (en) * | 2012-11-14 | 2013-03-18 | 주식회사 성우사면 | Method for digging tunnel |
| CN103993892A (en) * | 2014-05-29 | 2014-08-20 | 山东大学 | Supporting method for soft broken nonuniform stratum tunnel construction |
| WO2015142017A1 (en) * | 2014-03-18 | 2015-09-24 | 한국건설기술연구원 | Tunnel having steel rib having concrete filled steel tube structure and method for constructing same |
| CN204920983U (en) * | 2015-06-26 | 2015-12-30 | 中国建筑材料工业建设西安工程有限公司 | Pipe installation suitable for collapsible loess tunnel advance support |
| CN205117357U (en) * | 2015-11-21 | 2016-03-30 | 中铁二十局集团第二工程有限公司 | Weak surrounding rock tunnel advance support structure based on self -drilling spiral pipe canopy |
| CN105781582A (en) * | 2016-04-11 | 2016-07-20 | 长安大学 | Novel shallow-buried tunnel support structure applicable to urban sensitive areas and construction method of novel shallow-buried tunnel support structure applicable to urban sensitive areas |
| CN107675696A (en) * | 2017-08-23 | 2018-02-09 | 中铁二十二局集团有限公司 | A kind of Intelligent deep hole orientation slip casting and monitoring system |
| KR101834847B1 (en) * | 2017-03-17 | 2018-03-06 | (주)하경엔지니어링 | Echo-environmental construction method of tunnel portal area using mini pipe-roof |
| CN107905796A (en) * | 2017-10-24 | 2018-04-13 | 济南城建集团有限公司 | A kind of tunnels in soil Guan Peng operating rooms construction method |
| CN107965325A (en) * | 2017-10-24 | 2018-04-27 | 济南城建集团有限公司 | Just branch bow member replaces construction method to a kind of small interval shallow tunnel |
| CN208702428U (en) * | 2018-06-12 | 2019-04-05 | 北京市政路桥股份有限公司 | A kind of Tunnel Passing cavity canopy protection structure |
-
2018
- 2018-06-12 CN CN201810602200.2A patent/CN108590713A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050019580A (en) * | 2003-08-20 | 2005-03-03 | 주식회사 우지스 | The waterproofing air-bubbles grouting method of construction for tunnel hollow filling |
| CN102182471A (en) * | 2011-03-23 | 2011-09-14 | 彬县水帘洞煤炭有限责任公司 | Advance support method for coal mine tunnel high-risk area |
| KR101244257B1 (en) * | 2012-11-14 | 2013-03-18 | 주식회사 성우사면 | Method for digging tunnel |
| WO2015142017A1 (en) * | 2014-03-18 | 2015-09-24 | 한국건설기술연구원 | Tunnel having steel rib having concrete filled steel tube structure and method for constructing same |
| CN103993892A (en) * | 2014-05-29 | 2014-08-20 | 山东大学 | Supporting method for soft broken nonuniform stratum tunnel construction |
| CN204920983U (en) * | 2015-06-26 | 2015-12-30 | 中国建筑材料工业建设西安工程有限公司 | Pipe installation suitable for collapsible loess tunnel advance support |
| CN205117357U (en) * | 2015-11-21 | 2016-03-30 | 中铁二十局集团第二工程有限公司 | Weak surrounding rock tunnel advance support structure based on self -drilling spiral pipe canopy |
| CN105781582A (en) * | 2016-04-11 | 2016-07-20 | 长安大学 | Novel shallow-buried tunnel support structure applicable to urban sensitive areas and construction method of novel shallow-buried tunnel support structure applicable to urban sensitive areas |
| KR101834847B1 (en) * | 2017-03-17 | 2018-03-06 | (주)하경엔지니어링 | Echo-environmental construction method of tunnel portal area using mini pipe-roof |
| CN107675696A (en) * | 2017-08-23 | 2018-02-09 | 中铁二十二局集团有限公司 | A kind of Intelligent deep hole orientation slip casting and monitoring system |
| CN107905796A (en) * | 2017-10-24 | 2018-04-13 | 济南城建集团有限公司 | A kind of tunnels in soil Guan Peng operating rooms construction method |
| CN107965325A (en) * | 2017-10-24 | 2018-04-27 | 济南城建集团有限公司 | Just branch bow member replaces construction method to a kind of small interval shallow tunnel |
| CN208702428U (en) * | 2018-06-12 | 2019-04-05 | 北京市政路桥股份有限公司 | A kind of Tunnel Passing cavity canopy protection structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630282A (en) * | 2019-09-02 | 2019-12-31 | 中铁十八局集团有限公司 | Double-track railway tunnel weak surrounding rock advanced reinforcement simple pipe shed room |
| CN110630282B (en) * | 2019-09-02 | 2021-07-06 | 中铁十八局集团有限公司 | Double-track railway tunnel weak surrounding rock advanced reinforcement simple pipe shed room |
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