CN208702428U - A kind of Tunnel Passing cavity canopy protection structure - Google Patents
A kind of Tunnel Passing cavity canopy protection structure Download PDFInfo
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- CN208702428U CN208702428U CN201820905932.4U CN201820905932U CN208702428U CN 208702428 U CN208702428 U CN 208702428U CN 201820905932 U CN201820905932 U CN 201820905932U CN 208702428 U CN208702428 U CN 208702428U
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Abstract
The utility model discloses a kind of Tunnel Passing cavity canopy protection structures, 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 grouting system (7).When Tunnel Passing cavity, and when empty bigger, in order to save construction time and operating expenses, guarantee construction safety and construction quality, it devises and passes through empty canopy protection structure and method for protecting support, it mainly include 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, the safety accidents such as collapsing are effectively prevented.
Description
Technical field
A kind of canopy protection structure when the utility model is Tunnel Passing cavity, belongs to engineering construction technology field.
Background technique
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
The construction of backfill method, delays the duration, and country rock generates moderate finite deformation, influences construction safety, causes bigger economic waste.
Utility model content
The utility model is a kind of Tunnel Passing cavity canopy protection structure, when Tunnel Passing is empty, and cavity is bigger, is
Saving construction time and operating expenses guarantee construction safety and construction quality, devise and pass through empty canopy protection structure and supporting
Method mainly includes supporting and protection two parts, and retaining portion includes pipe canopy and arch, and guard section is increased on pipe booth structure
Protection wing plate is added to form tunnel structure protective layer, the height for the Level Change wing plate that can be pushed up according to hole adjusts overcoat thickness,
Effectively prevent hole roof fall stone, the safety accidents such as collapsing.
In the technical solution adopted in the utility model, a kind of Tunnel Passing cavity canopy protection structure, the structure includes canopy shield knot
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 note
Slurry 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 guiding wall, is equipped between first circulation pipe canopy (8) and second circulation pipe canopy (9)
(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 grouting system (7) be arranged at the mounting hole of canopy protection structure steel pipe (3).Canopy protection structure steel pipe (3), steel mesh
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) are equipped between shaped steel arch (5).
Outer limb α between canopy protection structure steel pipe (3) and guiding wall (2) is determined according to canopy protection structure length, is 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, and D takes two times of first lining thickness, and operating room's excavation length is determined according to the every section of steel pipe is long,
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).
Guiding wall (2) is the arch wall in guide tunnel direction, pre-buried canopy protection structure guide pipe and guiding steel in guiding wall (2)
Frame, guide pipe and guiding steelframe are equipped with wing plate hole simultaneously, and wing plate hole is oriented as plate penstock installation winged.Guiding wall is first when performing
Vertical arch and template, installation guiding steelframe and guide pipe, Reperfu- sion concrete are formed.To guarantee 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 calculated and is determined by numerical value according to empty size with height, there are a certain range of outer limb α, steel pipe and steelframes to weld for guiding steel pipe
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, and spacing is 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), as the fluctuating of spray plane is laid with.Reinforcing bar
It is overlapped securely between mesh sheet (4) and with the steel mesh 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, steel mesh must not be shaken.Processing is hung by the position that drawing is demarcated when linked network
Good reinforced mesh (4), reinforced mesh (4) are laid with the fluctuating of first spray plane, the canopy protection structure steel that binding and fixing are 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 a part of temporary support and permanent support.Shaped steel arch (5) uses I-steel,
Steel plate is welded to connect at every 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 warping 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, longitudinal to be connected using reinforcing bar, circumferential direction uses
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, fashioned iron connection, which can be used steel plate and tie up item, to be fully welded, and should first be expired fashioned iron 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 steel mesh 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 every 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.
Orienting grouting system (7) includes slurries vectored injection system and purpose monitoring system.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),
It detects 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 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) 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, visit
Parallel arrangement guarantees slip casting orientation, tool joint (7.2.3) and drilling tool and slip casting vertically by geodesic structure and 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 injection high pressure by drilling tool and grouting port (7.1.1) by design requirement
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 fashioned iron (11) of canopy protection structure and solidifying, firm protective layer is formed.
Purpose monitoring system, including terminal (7.2.2), data line (7.2.1), detection bar (7.2.4), are visited
Survey end (7.2.5) and pressure sensor (7.2.6), in slip casting can real-time monitoring be reinforced protective layer and high pressure
Interlayer pressure and slip casting overpressure between Grouting Pipe (7.1.2) adjust slip casting pressure according to acquisition data situation at any time
Power, grouting amount parameter.
When canopy protection structure passes through no charges cavern, backform fashioned iron (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 formed firm protective layer (12), the thickness of protective layer (12) is determined by the height of wing plate, bed die fashioned iron (11) be arranged in type
The bottom of steel arch-shelf (5), backform fashioned iron (10) and bed die fashioned iron (11) are arranged symmetrically along tunnel middle line (13).
Protective layer (12) refers to that, in canopy protection structure slip casting, 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 provided by the utility model to pass through empty canopy protection structure and method for protecting support, it has the advantage that
The utility model 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 orient slip casting and monitoring system, in slip casting can real-time monitoring be reinforced
Interlayer pressure and slip casting overpressure between protective layer and Grouting Pipe, achieve the purpose that real-time monitoring, and can ensure to infuse
Effect is starched, without there is a phenomenon where excessive slip casting or falling flat.In addition to this, the utility model construction when,
The fugitive dust for effectively site operation being inhibited to generate selects noise devices to construct, and noise is greatly controlled, and shunts rain
Water, engineering sewage mitigate influence of the sewage discharge to environment, have environmentally protective construction concept.
Detailed description of the invention
Fig. 1 canopy protection structure passes through no charges macroscopic-void skiagraph.
Canopy protection structure steel pipe section artwork of the Fig. 2 with wing plate.
Connection schematic diagram of the Fig. 3 between canopy protection structure steel pipe, reinforced mesh and wing plate.
Connection schematic diagram of the Fig. 4 between grouting system and shaped steel arch.
Fig. 5 canopy protection structure construction orientation grouting system schematic diagram.
Fig. 6 is that canopy protection structure passes through no charges cavern cross-sectional view.
Specific embodiment
Specific embodiment of the present invention is illustrated now in conjunction with attached drawing, attached drawing is schematic diagram, only with signal side
Formula illustrates this patent basic structure, is based on the embodiments of the present invention, and those skilled in that art are not making creativeness
Every other embodiment obtained, belongs to the protection scope of the utility model under the premise of labour.
A kind of method for protecting support of Tunnel Passing cavity canopy protection structure, specific step is as follows for this method:
S1 is oriented to wall construction: (a) according to tunnel axis and excavation contour line, installing two Pin and is 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 station, 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 pipe, the method outside canopy protection structure above canopy protection structure guide pipe
The reserved guiding wing plate jack in line direction, width 2cm, height 3m are (according to numerical result, the concrete cover of cover arch of tunnel
Thickness is determined as 3m), the guide pipe gradient is checked with slope ruler, is accurately positioned according to 1~3 ° of outer limb, and with connecting reinforcing bar and type
Steel arch-shelf is securely welded as a whole.(c) after detection canopy protection structure guide pipe and leading truck meet required precision, internal model is installed
Arch, internal model arch are formed with two Pin section steel manufactures, after support is firm, install outboard template on the outside of internal model arch.(d) it pours
It is oriented to wall, guiding wall uses C25 concreting, 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 concrete, wall for grouting when as slip casting.(f) outer side mold is removed after concrete strength satisfaction
Plate.
The production of S2 canopy pipe 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 also can be determining according to cyclic advance length scene, but section length is no more than 50m) divides
Section connects, every section of 3m long, and with screwed connection at pipe orifice joint, nozzle screw thread vehicle depth is 6cm female thread, and connecting tube uses Φ 127
× 8mm seamless steel pipe, 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) with loading machine, jacking canopy is protected under hand fit
Structured steel pipe, be staggered before and after the connector of adjacent canopy protection structure steel pipe 1.5m, is mounted on guiding wall after first steel pipe welding upper flange
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, successively heads into.(c) when canopy pipe is installed, every installation 3m canopy protection structure steel
Pipe performs five Pin shaped steel archs, and shaped steel arch is equipped with canopy pipe limiter, to the positioning of canopy protection structure steel pipe and supporting.Successively
Piecemeal erection canopy protection structure steel pipe and shaped steel arch.
The production of S3 shaped steel arch and installation: (a) I-steel arch uses 20b i shaped steel, every 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 warping 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 connection, spacing 60cm, circumferential direction are 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, fashioned iron connection use 20cm*h (h for
Fashioned iron height subtracts 4cm) thickness 1cm steel plate ties up item and is fully welded, should first expire fashioned iron butt welding 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 steel mesh, to reinforce its combined supporting effect.
The production and installation of S4 reinforced mesh: (a) reinforced mesh uses 6 round steel of Φ, and spacing is 5cm × 15cm, steel mesh
Single installation at the scene.Reinforced mesh couples securely with steel pipe, as the fluctuating of spray plane is laid with.Between steel mesh and with sprayed concrete
The steel mesh overlap joint of section is secured, and the lap of splice is not less than 200mm.Steel mesh need to be affiliated to securely, the reinforcing bar in gunite concrete
Net must not shake.(b) before reinforcement welding will first by the grease stain of rebar surface, paint is dirty, cement slurry and pounding with a hammer can peel off floats
Skin, iron rust etc. are removed completely；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: for the bending resistance and impact resistance for increasing canopy protection structure, steel is set in steel pipe
Muscle cage carries out reinforcement, You Sigen Φ 22mm reinforcing bar and fixed ring composition to structure, with loading machine jacking under hand fit.
S6 slip casting and protective layer construction: (a) face first must spray a layer concrete as wall for grouting, to the palm by element before slip casting
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. two Kong Huankong of machine note
Slurry.(b) slip casting carries out canopy protection structure using orientation grouting system, including slurries vectored injection system and purpose monitoring system
Orient slip casting and monitoring.(c) intermittent time cannot be greater than 1.5 hours, allow slurries to have certain setting time, prevent continuous grouting
Slurry is spread without limitation.(d) grouting sequence is the first low hole Kong Hougao, is marked with water hole after first infusing 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 pressure 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, blocks grout leaking mouth using intermittent slip casting, is spaced a hole or number hole slip casting, or use the dimity, wood
Wedge, quick-hardening cement mortar or Anchor Agent block, and are further continued for slip casting when no longer grout leaking, and pressure such as rises suddenly during slip casting
Height may then occur plugging, answer shutdown inspection.
S7 recycles construction: being 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 circulation lap of splice is not less than 3.0m, until being fully completed end.
Claims (4)
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 grouting 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 with guiding wall (2) between first circulation pipe canopy (8) and second circulation pipe canopy (9)；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,
Grouting system (7) are 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；
Orienting grouting system (7) includes slurries vectored injection system and purpose monitoring system；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) is transmitted by data
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 guarantees slip casting orientation, tool joint (7.2.3) and drilling tool and grouting port vertically by structure and 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)
Outer limb α between guiding wall (2) is determined according to canopy protection structure length, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820905932.4U CN208702428U (en) | 2018-06-12 | 2018-06-12 | A kind of Tunnel Passing cavity canopy protection structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820905932.4U CN208702428U (en) | 2018-06-12 | 2018-06-12 | A kind of Tunnel Passing cavity canopy protection structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590713A (en) * | 2018-06-12 | 2018-09-28 | 北京市政路桥股份有限公司 | A kind of Tunnel Passing cavity canopy protection structure and method for protecting support |
| CN110043295A (en) * | 2019-04-24 | 2019-07-23 | 五冶集团上海有限公司 | It is a kind of first to encircle the Tunnel Landslide processing method filled out afterwards |
| WO2021159621A1 (en) * | 2020-02-10 | 2021-08-19 | 中国地质大学（北京） | Novel two-stage boosting hydraulic impactor |
-
2018
- 2018-06-12 CN CN201820905932.4U patent/CN208702428U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590713A (en) * | 2018-06-12 | 2018-09-28 | 北京市政路桥股份有限公司 | A kind of Tunnel Passing cavity canopy protection structure and method for protecting support |
| CN108590713B (en) * | 2018-06-12 | 2024-05-14 | 北京市政路桥股份有限公司 | Tunnel crossing cavity canopy protection structure and supporting method |
| CN110043295A (en) * | 2019-04-24 | 2019-07-23 | 五冶集团上海有限公司 | It is a kind of first to encircle the Tunnel Landslide processing method filled out afterwards |
| WO2021159621A1 (en) * | 2020-02-10 | 2021-08-19 | 中国地质大学（北京） | Novel two-stage boosting hydraulic impactor |
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