CN109113764A - A kind of pre support technique for tunnel construction - Google Patents
A kind of pre support technique for tunnel construction Download PDFInfo
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- CN109113764A CN109113764A CN201811002834.0A CN201811002834A CN109113764A CN 109113764 A CN109113764 A CN 109113764A CN 201811002834 A CN201811002834 A CN 201811002834A CN 109113764 A CN109113764 A CN 109113764A
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- Prior art keywords
- conduit
- stratum
- detection
- working face
- tubing
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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
- E21D11/04—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
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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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
The invention discloses a kind of pre support techniques for tunnel construction, it is detected including stratum, select tubing, establish working face, establish leading truck, working face protection, drilling, it is inserted into the first conduit, it is inserted into the first conduit, select injecting paste material, sealing, slip casting, detection in pipe, structure of the invention is scientific and reasonable, it is safe and convenient to use, by being detected in advance to stratum, convenient for understanding the soft degree of stratum soil and the gap width of soil particle, to select suitable tubing width and suitable injecting paste material, improve the fixed effect of tubing and the fixed effect of slip casting, reduce the waste of material, reduce cost, by being adjusted to the elevation angle of drilling, convenient for improving the support effect of conduit, avoid the elevation angle excessive, pipeline is caused to lose support action far from tunnel outer diameter, by to being detected in pipe, convenient in detection pipe Slip casting effect improves the supporting effect of device, safety more convenient to use to take necessary measure according to the actual situation.
Description
Technical field
The present invention relates to Tunnel Engineering technical field, specially a kind of pre support technique for tunnel construction.
Background technique
With being constantly progressive for society, the continuous development of the vehicles, the more and more flourishing wherein sandhog of the construction of road
Journey is engineering project important in road engineering, Tunnel Engineering be build underground, it is underwater, massif building, place an iron railway, repair
Build an automobile road a series of building-up works of progress, is broadly divided into tunnel planning, exploration, design, perforation control measurement and construction working,
Tunnel can be divided into mountain tunnel, submerged tunnel and city tunnel three categories according to position, wherein building most is the mountain ridge
The excavation method in tunnel, tunnel is divided into cut and cover method and subsurface excavation method.Cut and cover method is chiefly used in shallow tunnel or city railway tunnel, and mountain
Ridge railway tunnel is mostly used subsurface excavation method；Excavated section size, position point are pressed, there is partial excavation method and full face tunneling method；In stone matter
It is the most extensive using drilling and blasting method in rock stratum, it is directly excavated using development machine and is also gradually promoted；Shield method is used in soft geology
It excavates more；
Wherein construction supporting be tunnel excavation must immediate support prevent from caving in reduce wall rock loosening；Construction supporting point
For component support and combined bolting and shotcrete, component support generally has timber, metal, steel wood hybrid component etc., uses bracing members person now
It gradually adds, combined bolting and shotcrete is a kind of method for protecting support to grow up the fifties in 20th century, and shotcrete technology is divided into dry spray
And wet shot, dry sprayig process is now mostly used, i.e., will mix a certain number of accelerators in dry-mix concrete, with compressed air by concrete
By being sprayed in pipe, on spout plus water-jet to rock face, 3~5 cm thicks can be once sprayed, are mixed in gunite concrete
Steel fibre, or hang steel wire in scar and the intensity of combined bolting and shotcrete can be improved, steel anchor rod is installed in the drilling on the face of rock stratum, is grown
Degree and spacing depending on rock property, general combined bolting and shotcrete, the preferable location in rock stratum only pneumatically placed concrete can be obtained it is enough
Supporting intensity, but in the soft soil in stratum, on the outside of mortar and clay binding force it is lower, the wasting of resources is larger,
Higher cost, while its construction distance is shorter, pre support rigidity is small, so that using effect is bad, common intubation supporting, due to
There are a certain distance between pipeline, to reduce the attachment force between pipeline, reduce integer support effect of device etc., institute
It is solved the above problems with being badly in need of a kind of pre support technique for tunnel construction.
Summary of the invention
The present invention provides a kind of pre support technique for tunnel construction, can effectively solve in above-mentioned background technique
The general combined bolting and shotcrete proposed, in the preferable location in rock stratum, only enough supporting intensities are can be obtained in pneumatically placed concrete, but on ground
In the soft soil of layer, on the outside of mortar and clay binding force it is lower, the wasting of resources is larger, higher cost, while it is applied
Work distance is shorter, and pre support rigidity is small, so that using effect is bad, common intubation supporting is certain due to existing between pipeline
Distance, thus the problems such as reducing the attachment force between pipeline, reduce the integer support effect of device.
To achieve the above object, the invention provides the following technical scheme: a kind of pay nurse in advance for tunnel construction
Skill includes the following steps:
S1, stratum detection: the cohesiveness of stratum soil is detected by sonic time difference；
S2, selection tubing: corresponding tubing is selected according to the stratum concrete condition of detection；
S3, it establishes working face: tunnel index plane is extended to operating room's section；
S4, establish leading truck: establishing a degree of leading truck inside working face, and adjust the angle of guide pipe by its
It is welded on leading truck；
S5, working face protection: by linked network inside working face and upright bar fill concrete, it is ensured that working face safety；
S6, drilling: guiding tube angulation is measured with measuring instrument, and the angle for adjusting drilling rod carries out boring work；
S7, the first conduit of insertion: side in the hole that the insertion of corresponding tubing is drilled, and adjust the angle；
S8, the second conduit of insertion: the other side in the hole that the insertion of the second conduit is drilled is allowed to be connected with the first conduit；
S9, it selects injecting paste material: corresponding injecting paste material being selected according to the stratum concrete condition of detection and carries out production filling
Slurry；
S10, sealing: the gap between nozzle and hell is sealed；
S11, slip casting: injecting deployed mud to catheter interior, and detects nozzle pressure；
It is detected in S12, pipe: detecting slip casting effect with sonic detector.
According to the above technical scheme, in the step S1, the solidifying of stratum soil stratum detection: is detected by sonic time difference
Poly- power, wherein sonic time difference detection be directed to transmit ultrasonic wave in stratum, using between Different Strata ultrasonic reflections when
Between difference detect the concrete condition on stratum.
According to the above technical scheme, it in the step S2, selects tubing: correspondence is selected according to the stratum concrete condition of detection
Tubing, when the formation strength of detection is higher, selecting the diameter of tubing is 89 millimeters, when the formation strength of detection is general,
Select the diameter of tubing for 108 millimeters.
According to the above technical scheme, it in the step S4, establishes leading truck: establishing a degree of lead inside working face
To frame, and the angle for adjusting guide pipe is welded on leading truck, wherein adjustment guide angle refers to according to the soft of stratum
The elevation angle of degree and the weight of drilling rod adjustment guide pipe.
According to the above technical scheme, in the step S5, working face protection: by linked network inside working face and upright bar is filled and is mixed
Solidifying soil, it is ensured that working face safety, wherein linked network refers to the linked network on working face and sprays mixed mud, the wall for grouting as slip casting.
According to the above technical scheme, in the step S6, drilling: guiding tube angulation is measured with measuring instrument, and adjusts drilling rod
Angle carry out boring work, wherein when boring work, spudded in first with low grade, when getting into certain depth, extension bar continues to creep into,
Adjust the angle of combined drilling and counterboring, it is ensured that the direction of drilling.
According to the above technical scheme, in the step S and step S, the connection type of the first conduit and the second conduit is specific
It is as follows, including the first conduit, T-type connector, the second conduit, connection ring, link slot, the first injected hole, the second injected hole, it is described
First conduit side is equipped with T-type connector, and T-type connector side is equipped with the second conduit, second conduit side
Connection ring is installed with T-type connector corresponding position, the connection ring side offers link slot, first conduit and
The first injected hole, the T-type connector side of first conduit and the connection ring one of the second conduit are offered on the outside of two conduits
Side offers the second injected hole.
According to the above technical scheme, it in the step S9, selects injecting paste material: being selected according to the stratum concrete condition of detection
Corresponding injecting paste material carries out production filling slurry, and anhydrous when fracture width is greater than 1 millimeter in the stratum of detection, then selects list
Liquid cement slurry when fracture width is greater than 1 millimeter in the stratum of detection, and has water wherein villaumite and triethanolamine accelerator is added,
Cement and the double slurry mixed serums of waterglass are then selected, wherein cement slurry and waterglass volume ratio are 1:0.6, when the stratum of detection
Middle fracture width then selects superfine cement slurries less than 1 millimeter.
According to the above technical scheme: in the step S11, slip casting: injecting deployed mud to catheter interior, and examine
Test tube mouth pressure, the detection nozzle pressure refer to the maximum pressure to detection aperture, are controlled the note born in stop grouting plug
It starches within pressure limit, when aperture, pressure value reaches specified value, but injection rate throws away deficiency, also stops slip casting.
According to the above technical scheme, it in the step S12, manages interior detection: detecting slip casting effect with sonic detector, it is described
Sonic detector detection, which refers to, detects the slip casting situation in drilling, when not up to requirement, should carry out after-teeming slurry.
Compared with prior art, beneficial effects of the present invention: structure of the invention is scientific and reasonable, safe and convenient to use: setting
There is stratum detection, by detecting in advance to stratum, convenient for understanding the soft degree of stratum soil and the gap of soil particle
Width improves the fixed effect of tubing and the fixed effect of slip casting to select suitable tubing width and suitable injecting paste material
Fruit reduces the waste of material, reduces cost, economizes on resources, by being adjusted to the elevation angle of drilling, convenient for improving the branch of conduit
Effect is supportted, avoids the elevation angle excessive, pipeline is caused to lose support action far from tunnel outer diameter, is made by the connection ring of the second conduit
With the T-type connector of the first conduit is protected, avoids it from causing deformed damaged with soil friction, then pass through the second slip casting
The effect in hole, convenient for being sealed to starch gap, improving the fixed effect of junction, while by two to junction slip casting
Conduit forms an entirety, improves supporting effect, by being detected in pipe, convenient for the slip casting effect in detection pipe, thus according to
Actual conditions take necessary measure, avoid starching less in pipe, improve the supporting effect of device, safety more convenient to use.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.
In the accompanying drawings:
Fig. 1 is the step flow chart of the pre support technique of tunnel construction of the present invention；
Fig. 2 is conduit attachment structure schematic diagram of the invention；
Figure label: 1, the first conduit；2, T-type connector；3, the second conduit；4, connection ring；5, link slot；6, the first note
Starch hole；7, the second injected hole.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Embodiment: as shown in Figs. 1-2, the present invention provides a kind of pre support technology side for tunnel construction
A kind of case, pre support technique for tunnel construction, includes the following steps:
S1, stratum detection: the cohesiveness of stratum soil is detected by sonic time difference；
S2, selection tubing: corresponding tubing is selected according to the stratum concrete condition of detection；
S3, it establishes working face: tunnel index plane is extended to operating room's section；
S4, establish leading truck: establishing a degree of leading truck inside working face, and adjust the angle of guide pipe by its
It is welded on leading truck；
S5, working face protection: by linked network inside working face and upright bar fill concrete, it is ensured that working face safety；
S6, drilling: guiding tube angulation is measured with measuring instrument, and the angle for adjusting drilling rod carries out boring work；
S7, the first conduit of insertion: side in the hole that the insertion of corresponding tubing is drilled, and adjust the angle；
S8, the second conduit of insertion: the other side in the hole that the insertion of the second conduit is drilled is allowed to be connected with the first conduit；
S9, it selects injecting paste material: corresponding injecting paste material being selected according to the stratum concrete condition of detection and carries out production filling
Slurry；
S10, sealing: the gap between nozzle and hell is sealed；
S11, slip casting: injecting deployed mud to catheter interior, and detects nozzle pressure；
It is detected in S12, pipe: detecting slip casting effect with sonic detector.
According to the above technical scheme, in step S1, the cohesion of stratum soil stratum detection: is detected by sonic time difference
Power, wherein sonic time difference detection are directed to transmit ultrasonic wave in stratum, utilize the time of ultrasonic reflections between Different Strata
Difference detects the concrete condition on stratum.
According to the above technical scheme, it in step S2, selects tubing: corresponding pipe is selected according to the stratum concrete condition of detection
Material, when the formation strength of detection is higher, selecting the diameter of tubing is 89 millimeters, when the formation strength of detection is general, selection
The diameter of tubing is 108 millimeters.
According to the above technical scheme, it in step S4, establishes leading truck: establishing a degree of guiding inside working face
Frame, and the angle for adjusting guide pipe is welded on leading truck, wherein adjustment guide angle refers to the soft journey according to stratum
The elevation angle of the weight of degree and drilling rod adjustment guide pipe.
According to the above technical scheme, in step S5, working face protection: by linked network inside working face and coagulation is filled in upright bar
Soil, it is ensured that working face safety, wherein linked network refers to the linked network on working face and sprays mixed mud, the wall for grouting as slip casting.
According to the above technical scheme, in step S6, drilling: guiding tube angulation is measured with measuring instrument, and adjusts the angle of drilling rod
Degree carries out boring work, wherein when boring work, is spudded in first with low grade, and when getting into certain depth, extension bar continues to creep into, adjustment
The angle of combined drilling and counterboring, it is ensured that the direction of drilling.
According to the above technical scheme, in step S7 and step S8, the connection type of the first conduit and the second conduit is specifically such as
Under, including the first conduit 1, T-type connector 2, the second conduit 3, connection ring 4, link slot 5, the first injected hole 6, the second injected hole
7,1 side of the first conduit is equipped with T-type connector 2, and 2 side of T-type connector is equipped with the second conduit 3,3 side of the second conduit with
2 corresponding position of T-type connector is equipped with connection ring 4, and 4 side of connection ring offers link slot 5, and the first conduit 1 and second are led
3 outside of pipe offers the first injected hole 6,2 side of T-type connector of the first conduit 1 and 4 side of connection ring of the second conduit 3
Offer the second injected hole 7.
According to the above technical scheme, it in step S9, selects injecting paste material: correspondence is selected according to the stratum concrete condition of detection
Injecting paste material carry out production filling slurry, it is and anhydrous when fracture width is greater than 1 millimeter in the stratum of detection, then select single liquid water
Mud when fracture width is greater than 1 millimeter in the stratum of detection, and has water, then selects wherein villaumite and triethanolamine accelerator is added
With cement and the double slurry mixed serums of waterglass, wherein cement slurry and waterglass volume ratio are 1:0.6, when crack in the stratum of detection
Width then selects superfine cement slurries less than 1 millimeter.
According to the above technical scheme, in step S11, slip casting: deployed mud is injected to catheter interior, and detects nozzle
Pressure, detection nozzle pressure refer to the maximum pressure to detection aperture, are controlled the grouting pressure range born in stop grouting plug
Within, when aperture, pressure value reaches specified value, but injection rate throws away deficiency, also stops slip casting.
According to the above technical scheme, it in step S12, manages interior detection: detecting slip casting effect, acoustic detection with sonic detector
Instrument detection, which refers to, detects the slip casting situation in drilling, when not up to requirement, should carry out after-teeming slurry.
The working principle of the invention and process for using: when hole work when, first by advance to stratum carry out
Detection, convenient for understand stratum soil soft degree and soil particle gap width, thus select suitable tubing width and
Suitable injecting paste material improves the fixed effect of tubing and the fixed effect of slip casting, reduces the waste of material, reduces cost, section
About resource, convenient for improving the support effect of conduit, avoids the elevation angle excessive, causes then by being adjusted to the elevation angle of drilling
Pipeline loses support action far from tunnel outer diameter, is drilled and is inserted the catheter into drilling by drilling rod, and the first conduit 1 is adjusted
Angle so that it is connected with the second conduit 3, acted on by the connection ring 4 of the second conduit 3, by the T-type connector 2 of the first conduit 1
It is protected, avoids it from causing deformed damaged with soil friction, then pass through the effect of the second injected hole 7, convenient for being infused to junction
Slurry, is sealed to starch gap, improves the fixed effect of junction, while two conduits are formed an entirety, then to
Note such as deployed slurries inside first conduit 1 and the second conduit 3 by pipeline outside and are bored by the effect of the first injected hole 6
It fills slurries inside hole, improves supporting effect, finally by being detected in pipe, convenient for the slip casting effect in detection pipe, thus root
Necessary measure is taken according to actual conditions, avoids starching less in pipe, improves the supporting effect of device, safety more convenient to use.
Finally, it should be noted that being not intended to restrict the invention the foregoing is merely preferred embodiment of the invention, to the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, for those skilled in the art, still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of pre support technique for tunnel construction, which comprises the steps of:
S1, stratum detection: the cohesiveness of stratum soil is detected by sonic time difference；
S2, selection tubing: corresponding tubing is selected according to the stratum concrete condition of detection；
S3, it establishes working face: tunnel index plane is extended to operating room's section；
S4, it establishes leading truck: establishing a degree of leading truck inside working face, and the angle for adjusting guide pipe is welded
On leading truck；
S5, working face protection: by linked network inside working face and upright bar fill concrete, it is ensured that working face safety；
S6, drilling: guiding tube angulation is measured with measuring instrument, and the angle for adjusting drilling rod carries out boring work；
S7, the first conduit of insertion: side in the hole that the insertion of corresponding tubing is drilled, and adjust the angle；
S8, the second conduit of insertion: the other side in the hole that the insertion of the second conduit is drilled is allowed to be connected with the first conduit；
S9, it selects injecting paste material: corresponding injecting paste material being selected according to the stratum concrete condition of detection and carries out production filling slurry；
S10, sealing: the gap between nozzle and hell is sealed；
S11, slip casting: injecting deployed mud to catheter interior, and detects nozzle pressure；
It is detected in S12, pipe: detecting slip casting effect with sonic detector.
2. a kind of pre support technique for tunnel construction according to claim 1, it is characterised in that: the step
In S1, stratum detection: detecting the cohesiveness of stratum soil by sonic time difference, and wherein sonic time difference detection is directed to stratum
Middle transmission ultrasonic wave, the concrete condition on stratum is detected using the time difference of ultrasonic reflections between Different Strata.
3. a kind of pre support technique for tunnel construction according to claim 1, it is characterised in that: the step
In S2, selects tubing: corresponding tubing is selected according to the stratum concrete condition of detection, when the formation strength of detection is higher, choosing
The diameter for selecting tubing is 89 millimeters, when the formation strength of detection is general, selects the diameter of tubing for 108 millimeters.
4. a kind of pre support technique for tunnel construction according to claim 1, it is characterised in that: the step
In S4, leading truck is established: establishing a degree of leading truck inside working face, and the angle for adjusting guide pipe is welded to
On leading truck, wherein adjustment guide angle refers to the elevation angle of the weight adjustment guide pipe of the soft degree and drilling rod according to stratum.
5. a kind of pre support technique for tunnel construction according to claim 1, it is characterised in that: the step
In S5, working face protection: by linked network inside working face and upright bar fill concrete, it is ensured that working face safety, wherein linked network refers to
Linked network and mixed mud is sprayed on working face, the wall for grouting as slip casting.
6. a kind of pre support technique for tunnel construction according to claim 1, it is characterised in that: the step
In S6, drilling: measuring guiding tube angulation with measuring instrument, and the angle for adjusting drilling rod carries out boring work, wherein when boring work,
It is spudded in first with low grade, when getting into certain depth, extension bar continues to creep into, and adjusts the angle of combined drilling and counterboring, it is ensured that the direction of drilling.
7. a kind of pre support technique for tunnel construction according to claim 1, it is characterised in that: the step
In S7 and step S8, the connection type of the first conduit and the second conduit is specific as follows, including the first conduit (1), T-type connector
(2), the second conduit (3), connection ring (4), link slot (5), the first injected hole (6), the second injected hole (7), first conduit
(1) side is equipped with T-type connector (2), and T-type connector (2) side is equipped with the second conduit (3), second conduit
(3) side and T-type connector (2) corresponding position are equipped with connection ring (4), and connection ring (4) side offers link slot
(5), it is offered the first injected hole (6) on the outside of first conduit (1) and the second conduit (3), the T of first conduit (1)
Type connector (2) side and connection ring (4) side of the second conduit (3) offer the second injected hole (7).
8. a kind of pre support technique for tunnel construction according to claim 1, it is characterised in that: the step
In S9, injecting paste material is selected: corresponding injecting paste material being selected according to the stratum concrete condition of detection and carries out production filling slurry, works as inspection
Fracture width is greater than 1 millimeter in the stratum of survey, and anhydrous, then selects single liquid cement slurry, wherein villaumite and triethanolamine speed is added
Solidifying agent when fracture width is greater than 1 millimeter in the stratum of detection, and has water, then selects cement and the double slurry mixed serums of waterglass,
Middle cement slurry and waterglass volume ratio are 1:0.6, when fracture width then selects superfine cement less than 1 millimeter in the stratum of detection
Slurries.
9. a kind of pre support technique for tunnel construction according to claim 1, it is characterised in that: the step
In S11, slip casting: injecting deployed mud to catheter interior, and detects nozzle pressure, and the detection nozzle pressure refers to inspection
The maximum pressure of gaging hole mouth is controlled within the scope of the grouting pressure that stop grouting plug is born, and when aperture, pressure value reaches regulation
Value, but injection rate throws away deficiency, also stops slip casting.
10. a kind of pre support technique for tunnel construction according to claim 1, it is characterised in that: the step
In rapid S12, interior detection is managed: detecting slip casting effect with sonic detector, the sonic detector detection refers to the note in drilling
Slurry situation is detected, and when not up to requirement, should carry out after-teeming slurry.
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109113764B (en) | 2020-01-10 |
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