CN110331992A - A kind of hole daguanpeng construction method - Google Patents
A kind of hole daguanpeng construction method Download PDFInfo
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- CN110331992A CN110331992A CN201910601404.9A CN201910601404A CN110331992A CN 110331992 A CN110331992 A CN 110331992A CN 201910601404 A CN201910601404 A CN 201910601404A CN 110331992 A CN110331992 A CN 110331992A
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- 238000010276 construction Methods 0.000 title claims abstract description 61
- 238000005553 drilling Methods 0.000 claims abstract description 45
- 238000007569 slipcasting Methods 0.000 claims abstract description 43
- 238000009412 basement excavation Methods 0.000 claims abstract description 12
- 239000002689 soil Substances 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 77
- 239000010959 steel Substances 0.000 claims description 77
- 239000004567 concrete Substances 0.000 claims description 47
- 239000002002 slurry Substances 0.000 claims description 37
- 238000009434 installation Methods 0.000 claims description 31
- 238000013461 design Methods 0.000 claims description 29
- 239000011435 rock Substances 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 10
- 230000002787 reinforcement Effects 0.000 claims description 10
- 239000004570 mortar (masonry) Substances 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 8
- 238000003892 spreading Methods 0.000 claims description 8
- 230000007480 spreading Effects 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 230000010412 perfusion Effects 0.000 claims description 6
- 230000002829 reductive effect Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
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- 239000011425 bamboo Substances 0.000 claims description 3
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- 238000010168 coupling process Methods 0.000 claims description 3
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- 239000004576 sand Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to constructing tunnel fields, and in particular to a kind of hole daguanpeng construction method.It includes the following steps: that step S1 surveying setting-out, step S2 face upward slope molding and lead arch construction operation platform, step S3 applies set and encircles, installs guide pipe, the construction of step S4 drilling machine workbench, step S5 drilling, step S6 pipe roof construction, step S7 closing excavation face and step S8 slip casting.It not only ensure that the safety of construction, also effectively increase pipe roof construction speed；It can ensure that hole top coating is in stablize, be adapted to complex geologic conditions, the loose layer of sand of soil property, argillic horizon etc., apply that process power output is uniform, it is few to the interference of geology.
Description
Technical field
The present invention relates to constructing tunnel fields, and in particular to a kind of hole daguanpeng construction method.
Background technique
Big for slope surface rickle thickness, harmful engineering ground phenomenon is avalanche, shows as the slope of collapsed accumulation body
Body is in stable state in its natural state, but under mankind's activity, stability is poor, especially when outlet section country rock is broken
Shi Shi carries out tunnel excavation in loosely-packed layer, and surrounding rock stability is poor, is easy to happen collapse and cave-in.The installation of pipe canopy
Reasonability is to the construction important in inhibiting of subsequent tunnel, and therefore, reasonable pipe shed construction method is particularly important.Currently, existing
Pipe shed construction method to easily lead to supporting effect lower.
Summary of the invention
Present invention seek to address that the above problem, provides a kind of hole daguanpeng construction method, it not only ensure that construction
Safety, also effectively increase pipe roof construction speed；It can ensure that hole top coating is in stablize, it is multiple to be adapted to geological conditions
Miscellaneous, the loose layer of sand of soil property, argillic horizon etc. apply that process power output is uniform, the technical side that uses few to the interference of geology
Case is as follows:
A kind of hole daguanpeng construction method, which comprises the steps of:
Step S1 surveying setting-out, first review line midline, level, the wire center line traffic control stake of root Ju and vertical control point
Facing upward slope surface, to identify tunnel center line and bowed out top mark high, and draws bowed out arc facing upward slope surface according to dark hole excavation contour line,
As the foundation of guiding wall formwork erection, the height for being oriented to external mold within the walls is controlled according to the mileage of guiding wall, and reserved corresponding heavy
Drop amount；
Step S2 faces upward slope molding and leads arch construction operation platform, according to design mileage, elevation and radius, excavates trim edges and faces upward
Slope and hole Core Soil are all satisfied its bearing capacity, compactness, radian and lead arch bed die requirement, and excavation leads skewback plinth, and masonry grouts
Piece stone foundation is laid with bamboo slab rubber as arch construction bottom die plate is led on Core Soil, erects I-steel steelframe according to design, welding connects
Muscle and orifice tube are connect, installation leads arch side template and two side portions top template, pours and lead arch concrete；
Step S3 applies set arch, installs guide pipe；
The construction of step S4 drilling machine workbench, drilling machine construction podium level apply height lower than guiding wall, will excavate platform
Deepened position other than two sides；
Step S5 drilling, is carried out using pipe shed drilling rig, and the height of drilling machine platform is according to the controllable range and brill of drilling machine
Hole mistake hole (subdrilling odd number) is determined, and since drill hole of drilling machine sequence is carried out by high hole location to low hole location, position of platform is corresponding certainly
It is gradually reduced under above, to meet drilling needs；
Step S6 pipe roof construction；
Step S7 closes excavation face, excavates face closure and uses wet shotcreting mode, forms wall for grouting, prevent slurry reflux
Influence slip casting effect；
Step S8 slip casting.
On that basis of the above technical scheme, the step S3 applies set arch, installs guide pipe and include the following steps:
I-steel installation: to guarantee pipe roof construction rigidity, 4 Pin i-beam frames are set within the walls in guiding, every Pin steelframe is divided into five
A unit, steelframe guarantee that the radian of every section and size meet design requirement, and fishplate bar, I-steel are each in succession at every section steelframe both ends
Unit couples blending bolt by connecting plate and connects firm, and connecting plate is answered closely connected, examination is carried out after processing spells to check, every Pin steelframe is every
End needs 4 sets of bolts, nuts altogether, should set up in strict accordance with design middle line and horizontal position when steelframe is installed, the lower end of steelframe is located at
On firm stratum, arch springing height excavates 15~20cm of baseline or less lower than top, when arch springing excavates ultra-deep, adds steel plate or mixed
Solidifying soil cushion block, in concrete perfusion, steelframe should be covered all by concrete, and steelframe protective layer thickness is not less than 40mm, and steelframe exists
It should try to spell on cement floor after completion of processing, longitudinally be arranged using reinforcing bar circumferential direction spacing between 2 Pin steelframes, and couple jail with steelframe
Gu steelframe is bottomed need to be placed on firm basement rock, when arch springing excavates ultra-deep, steel plate or concrete pad need to be added；
Guide pipe is embedded: after the completion of i-beam frame is set up, carry out the embedded of guide pipe, circumferential spacing according to pipe canopy spacing and
Fixed, guide pipe is subjected to displacement in concrete perfusion in order to prevent, and guide pipe is connected on i-beam frame according to design requirement, peace
When filling guide pipe, the circumferential spacing and lengthwise position of guide pipe are controlled, to meet design requirement, can first be marked in i-beam frame top surface
The position of guide pipe is made, and arranges guide pipe by spacing, deflection requirement, guide pipe is longitudinal to be needed unanimously, outside with line direction
Limb angle is 1 °~3 °, in order to avoid pipe shed drilling rig drilling intrusion tunnel cutting section, mortar enters when to avoid concrete from being poured
And guide pipe is blocked, need to be pushed against with end mould when guide pipe is installed and is secured firmly to it on mould of end；
Template installation: being bolted between set arch steel form, smoother to ensure to be oriented to mould within the walls, is oriented to wall end mould
Plate is installed using plank, between plank connection using plus back up mode reinforced, between plank sheathing and steel form using dog or
Steel nail is connected firmly, and checks that template size is flat except elevation of top surface deviation, guiding wall marginal position deviation, template before installation template
Whole degree, template surface faulting of slab ends deviation, template installation need solid and reliable, template and concrete surface brushing release agent；
Concrete casting: before concrete casting, template, guide pipe need to be checked again, and make calibration, in template
Line, level and size have to comply with design requirement, and the position of built-in fitting must be correct, and template installation and bracket must be securely tight
Close, set arch is poured using concrete, and concrete is unified by mixing station centralizedly supply, and concrete fills vehicle transport, and hand fit is mechanical
It is poured and makes firm by ramming closely knit, casting sequence is symmetrically to be poured from arch springing two sides, until vault；
Concrete demoulding and maintenance: after concrete is poured, need to be conserved in time, and curing age must not be less than 7 days,
Concrete strength reach design strength 70% after remove non-bearing template and Side Template, intensity and reach the 100% of design strength
Internal model and bracket are removed afterwards.
On that basis of the above technical scheme, the step S6 pipe roof construction includes the following steps:
Borehole cleaning and down tube immediately after pore-forming, in order to avoid because the hole that collapses causes to can not be successfully installation due to blocking in hole, when down tube, need to be taken
If the landing stage of scaffold, manually to push and pull based on jacking, it is aided with digging machine ejection,
Pipe canopy steel splitting pipe and steel floral tube, when construction, first set steel floral tube and cementing slurries, play steel pipe, then to check
The grouting quality of steel floral tube；
Pipe canopy carries out cleaning bottom of hole, borehole cleaning, dross in cleaning hole with high-pressure blast device to hole is interior in a pre-installation, it is ensured that aperture, hole depth symbol
It closes and requires, prevent plug-hole, pipe canopy is installed using jacking, section by section spreading, the joint steel pipe hot rolling seamless steel for spreading tube coupling
Pipe is attached by outer thread button and interior thread button, and in order to improve the bending resistance of pipe canopy, steel reinforcement cage is added in pipe canopy, main
Muscle is using overlap joint connection, side item connection.
On that basis of the above technical scheme, the S8 grouting includes the following steps:
Pipe canopy and steel reinforcement cage carry out slip casting after being installed, injecting paste material uses cement slurry, ratio of mud 1:1, and slip casting is suitable
Sequence is carried out from low hole location to high hole location in principle, and complete opening uses disposable slip casting, fills steel using cement mortar after slip casting
Pipe；
Since pipe canopy spacing is smaller, adjacent steel floral tube hole is caused to avoid occurring when slip casting string hole when geological condition is poor
Blocking, hole-specifically slip casting, while slurries being allowed to be diffused filling in loose country rock, broken rock stratum is consolidated, phase is conducive to
Chip off-falling is reduced in drilling in adjacent hole, avoids that bit freezing occurs or falls bore, fall pricker phenomenon, is conducive to accelerate construction progress；
Injected hole blocks mode: being coupled using steel plate in steel pipe opening and is blocked, reserves Grouting Pipe and exhaust pipe, Grouting Pipe installation
Valve, plug closing is tight, grouting mode: in the direct slip casting of Guan Pengkou.
The invention has the benefit that not only ensure that the safety of construction, pipe roof construction speed is also effectively increased；It can
Ensure that hole top coating is in stablize, is adapted to complex geologic conditions, the loose layer of sand of soil property, argillic horizon etc., it is dynamic to apply process
Power output is uniformly, few to the interference of geology.
Detailed description of the invention
Fig. 1 is construction process figure of the invention；
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples:
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be direct phase
Even, can also indirectly connected through an intermediary, the interaction that can be connection or two elements inside two elements is closed
System.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood as the case may be
Meaning.
As shown in Figure 1, a kind of hole daguanpeng construction method, which comprises the steps of:
Step S1 surveying setting-out, first review line midline, level, the wire center line traffic control stake of root Ju and vertical control point
Facing upward slope surface, to identify tunnel center line and bowed out top mark high, and draws bowed out arc facing upward slope surface according to dark hole excavation contour line,
As the foundation of guiding wall formwork erection, the height for being oriented to external mold within the walls is controlled according to the mileage of guiding wall, and reserved corresponding heavy
Drop amount；
Step S2 faces upward slope molding and leads arch construction operation platform, according to design mileage, elevation and radius, excavates trim edges and faces upward
Slope and hole Core Soil are all satisfied its bearing capacity, compactness, radian and lead arch bed die requirement, and excavation leads skewback plinth, and masonry grouts
Piece stone foundation is laid with bamboo slab rubber as arch construction bottom die plate is led on Core Soil, erects I-steel steelframe according to design, welding connects
Muscle and orifice tube are connect, installation leads arch side template and two side portions top template, pours and lead arch concrete；
Step S3 applies set arch, installs guide pipe；
The construction of step S4 drilling machine workbench, drilling machine construction podium level apply height lower than guiding wall, will excavate platform
Deepened position other than two sides；
Step S5 drilling, is carried out using pipe shed drilling rig, and the height of drilling machine platform is according to the controllable range and brill of drilling machine
Hole mistake hole (subdrilling odd number) is determined, and since drill hole of drilling machine sequence is carried out by high hole location to low hole location, position of platform is corresponding certainly
It is gradually reduced under above, to meet drilling needs；The side combined is oriented to total station, hanging wire, drilling rod when drilling machine is in place
Method adjusts repeatedly, it is ensured that borer drill rod axis and guidance axis match, in drilling, if occurring answering slip casting when bit freezing, collapse hole
It bores again afterwards.When drilling, borehole log should be conscientiously filled in, in addition to record drilling depth, deflection, should also consider to be worth doing or take according to drilling out
Stamen situation records country rock situation when different holes, achievees the purpose that forward probe country rock.Hole should carry out borehole cleaning after being drilled；
Step S6 pipe roof construction；
Step S7 closes excavation face, excavates face closure and uses wet shotcreting mode, forms wall for grouting, prevent slurry reflux
Influence slip casting effect；
Step S8 slip casting.
Preferably, the step S3 applies set arch, installs guide pipe and include the following steps:
I-steel installation: to guarantee pipe roof construction rigidity, 4 Pin i-beam frames are set within the walls in guiding, I-steel radius is
6.54m, spacing 0.5m, every Pin steelframe are divided into five units, and steelframe guarantees that the radian of every section and size meet design requirement, often
Save steelframe both ends fishplate bar in succession, it is firm that I-steel each unit by connecting plate couples blending bolt connection, connecting plate answer it is closely connected,
Examination is carried out after processing and spells inspection, and every every end of Pin steelframe needs 4 sets of bolts, nuts altogether, should be in strict accordance with design middle line when steelframe is installed
And horizontal position is set up, installation dimension tolerance: laterally and elevation is 0~+5cm, and the lower end of verticality ± 2 °, steelframe is located at
On firm stratum, arch springing height excavates 15~20cm of baseline or less lower than top, when arch springing excavates ultra-deep, adds steel plate or mixed
Solidifying soil cushion block, in concrete perfusion, steelframe should be covered all by concrete, and steelframe protective layer thickness is not less than 40mm, and steelframe exists
Should try after completion of processing to spell on cement floor, assembly tolerance in steelframe periphery is ± 3cm, and plane warping should be less than 2cm, 2
It is longitudinally arranged using reinforcing bar circumferential direction spacing between Pin steelframe, and coupled securely with steelframe, steelframe is bottomed need to be placed on firm basement rock,
When arch springing excavates ultra-deep, steel plate or concrete pad need to be added, when I-steel is installed, should ensure that I-steel bottom to internal model top surface
Distance reach 2.5cm (i.e. the thickness of concrete cover of I-steel bottom)；
Guide pipe is embedded: after the completion of i-beam frame is set up, carrying out the embedded of guide pipe, guide pipe uses diameter for Φ
The seamless steel pipe of 127mm, wall thickness 6.5mm, the length of guide pipe are 2.0m, and circumferential spacing is depending on pipe canopy spacing
Guide pipe is prevented to be subjected to displacement in concrete perfusion, guide pipe is connected on i-beam frame according to design requirement, installation is led
When to pipe, the circumferential spacing and lengthwise position of guide pipe are controlled, to meet design requirement, can first be calibrated in i-beam frame top surface
The position of guide pipe, and guide pipe is arranged by spacing, deflection requirement, guide pipe is longitudinal to need consistent, outer limb with line direction
Angle is 1 °~3 °, in order to avoid pipe shed drilling rig drilling intrusion tunnel cutting section, mortar enters and blocks up when to avoid concrete from being poured
Guide pipe is filled in, need to be pushed against with end mould when guide pipe is installed and is secured firmly to it on mould of end；
Template installation: being bolted between set arch steel form, smoother to ensure to be oriented to mould within the walls, is oriented to wall end mould
Plate is installed using 5cm solid wood, and connection is used between plank sheathing and steel form and taken off using adding back up mode to be reinforced between plank
Nail or steel nail are connected firmly, and check template size except elevation of top surface tolerance 10mm, guiding wall margin location before installation template
Tolerance+10mm or 0mm, template flatness are set no more than 5mm, template surface faulting of slab ends tolerance 2mm, template installation needs jail
Gu reliable, template and concrete surface brushing release agent；
Concrete casting: before concrete casting, template, guide pipe need to be checked again, and make calibration, in template
Line, level and size meet design requirement, and the position of built-in fitting must be correct, and template installation and bracket secure rigid, set arch are adopted
It is poured with concrete, concrete is unified by mixing station centralizedly supply, and concrete fills vehicle transport, and hand fit's machinery is poured and makes firm by ramming
Closely knit, casting sequence is symmetrically to be poured from arch springing two sides, until vault；
Concrete demoulding and maintenance: after concrete is poured, need to be conserved in time, and curing age must not be less than 7 days,
Concrete strength reach design strength 70% after remove non-bearing template (external mold) and Side Template, intensity and reach design strength
Internal model and bracket are removed after 100%.
Preferably, the step S6 pipe roof construction includes the following steps:
Borehole cleaning and down tube immediately after pore-forming, in order to avoid because the hole that collapses causes to can not be successfully installation due to blocking in hole, when down tube, need to be taken
If the landing stage of scaffold, manually to push and pull based on jacking, it is aided with digging machine ejection,
Pipe canopy steel splitting pipe and steel floral tube, when construction, first set steel floral tube and cementing slurries, play steel pipe, then to check
The grouting quality of steel floral tube,
Long pipe shed is the seamless steel pipe that diameter is 108mm, wall thickness is 6mm, boring aperture 12mm on pipe canopy tube wall, and is in plum
Flower-shape arranges that longitudinally, laterally spacing is 15cm for it, and tail portion is that only slurry section 300cm, the steel floral tube not drilled connect same section
Head number must not exceed the 50% of pipe number；
Pipe canopy carries out cleaning bottom of hole, borehole cleaning, dross in cleaning hole with high-pressure blast device to hole is interior in a pre-installation, it is ensured that (aperture is or not aperture
It obtains and meets the requirements less than 127cm), hole depth, prevent plug-hole, pipe canopy is installed using jacking, section by section spreading, for connecing for spreading tube coupling
Head steel pipe is buckled with hot rolled seamless steel tube by outer thread and interior thread is buckled and is attached, in order to improve the bending resistance of pipe canopy,
Steel reinforcement cage is added in pipe canopy, steel reinforcement cage uses 4 main reinforcements for the screw-thread steel of 16mm, and fixed ring uses diameter for the reinforcing bar of 6.5mm,
Main reinforcement is using overlap joint connection, side item connection.
Preferably, the S8 grouting includes the following steps:
Pipe canopy and steel reinforcement cage carry out slip casting after being installed, injecting paste material uses cement slurry, ratio of mud 1:1, and slip casting is suitable
Sequence is carried out from low hole location to high hole location in principle, and grouting pressure first pressing takes 0.8~1.0MPa, final pressure 2.0MPa, and complete opening uses
Disposable slip casting fills steel pipe using cement mortar after slip casting；
Since pipe canopy spacing is smaller, adjacent steel floral tube hole is caused to avoid occurring when slip casting string hole when geological condition is poor
Blocking, hole-specifically slip casting, while slurries being allowed to be diffused filling in loose country rock, broken rock stratum is consolidated, phase is conducive to
Chip off-falling is reduced in drilling in adjacent hole, avoids that bit freezing occurs or falls bore, fall pricker phenomenon, is conducive to accelerate construction progress；
Injected hole blocks mode: being coupled using steel plate in steel pipe opening and is blocked, reserves Grouting Pipe and exhaust pipe, Grouting Pipe installation
Valve, plug closing is tight, and grouting mode: in the direct slip casting of Guan Pengkou, Grouting Pipe gos deep into pipe 0.2~0.5m of canopy, grouting pressure
Depending on the difference of nature of ground, groundwater condition and injecting paste material, final grouting pressure takes 2.0Mpa under normal circumstances, with single hole
Grouting amount and grouting pressure are designed as slip casting ending standard, wherein based on should being controlled with single hole grouting amount, grouting pressure control
Supplemented by.
The hole daguanpeng construction method can also include that grouting small pilot pipe is constructed, grouting small pilot pipe construction party
Method includes:
The processing and fabricating of step A1 ductule
Ductule is processed using steel pipe, and the nozzle position of conduit sets reinforcing bar reinforcing ring；Steel pipe leading portion is not less than 30cm range
Do not bore slurry outlet inside, rest part is circumferential at a certain distance to bore four holes, and adjacent twice aperture direction interlocks 45° angle；Tip
Long 10cm, first cuts off notch, is being processed into tip, and coupled；
Step A2 drilling and jacking
It excavates forward position arch excavation contour line external standard and goes out hole location, drilled using rock bolting jumbo or air pressure gun, using certainly in construction
The drilling rod of system, connector sleeve carry out spreading construction, and ductule is penetrated steelframe using the air drill with impact and is headed into hole, ductule
Exposed junction is supported on the steel arch-shelf being subsequently mounted, and collectively constitutes pre support system with profile steel frame, will be in steel pipe with high-pressure blast
Sandstone blowout, block aperture and surrounding crack with plasticine for physical after borehole cleaning is clean；
Step A3 prepares slurries
The stirring of cement slurry carries out in high-speed mixer, feeds intake in strict accordance with coordination in works, configured slurry
Liquid is stored in the slurry can by low-speed agitator, prevents slurries due to resting period slightly long phenomena such as generating precipitating, isolation；
Step A4 slip casting
First gunite concrete closing face, which makees only slurry disk, grouting sequence, before slip casting follows in principle " in behind first two sides
Between ", " jump hole slip casting ", " from thin to thick " principle.To prevent grout leaking and running pulp, using dividing slurry device, while four small lead is perfused
It manages, can make to be mixed into some rubbles and clast in pipe in jacking construction operation process, be blown before mortar depositing construction with high pressure geomantic omen
It washes, grouting equipment uses high-pressure injection pump, cement injection, and grouting pressure is generally 0.5~1Mpa；Single hole grouting amount:
Single hole grouting amount is related with the porosity of country rock, is estimated with following formula:
Q=π R2Ln β
In formula: Q-single hole slurries injection rate (m3)；
R-grout spreading range (m)；
L-slip casting segment length (m)；
N-rock gap rate, generally takes 0.1~0.3；
Effective volumetric efficiency of the β-slurries in blowhole, generally 0.6~0.9.
The sundries such as paper scrap are forbidden to be mixed into slurries when mixing slurry, the slurries mixed will be forbidden by filtering, filtered slurries
Into the pump housing, with anti-clogging, during slip casting, the moment to pay attention to the pressure changing in pumping hole and aperture, found the problem in time
Processing；
Drilling, slip casting record are carried out, foundation is provided for analysis slip casting effect, after slip casting, thoroughly to clean the pump housing
And pipeline, to guarantee the safe and smooth progress of next slip casting, such as discovery face spillage during mortar depositing construction is sealed with burlap
It is stifled；
Step A5 mortar depositing construction quality assurance
In mortar depositing construction operation, the pressure of slurries injection is a most key site operation process control factors, root
The aperture pressure change shown according to flowmeter may determine that the basic development situation of mortar depositing construction, and take corresponding measure in time,
If a, pressure is gradually increasing, but is not achieved the pressure of design requirement, the reason is that: concentration of slurry is low, gel time compared with
Long, slurries form splitting arteries and veins either fraction slurries in rubble and overflow, and appropriateness increases concentration of slurry, short time interval slip casting；
If b, slip casting starts rear pressure and do not rise, or even there is initial pressure in downward trend, the reason is that: show slurries
It is excessive.Big concentration slurries and lower injection rate are taken at this time, if situation first stops slip casting without change；
If c, grouting pressure declines suddenly after rising, show that slurries overflow or injection rate mistake around Grouting Pipe
Greatly, rubble rock stratum is disturbed, or encounters gap weak part.Appropriateness reduces injection rate at this time；
D, if pressure is gone up and down repeatedly, but general trend in rise situation, the reason is that: due to grouting serous fluid gel time compared with
Short, appropriateness adjusts long slurries gel time at this time；
If e, pressure rises quickly, and injection rate does not increase, the reason is that: show that slip casting rock stratum is more closely knit or slurries
Gel time it is too short；
If f, the regular rising of pressure, even if reach allowable pressure, injection speed is also relatively more normal, this shows that slip casting is applied
The industry that works is successful；
If decline after g, pressure rises again, however pressure rose once again again later, and reached the required value of design, can recognize
To be successful.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or
In the case where essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention
It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (4)
1. a kind of hole daguanpeng construction method, which comprises the steps of:
Step S1 surveying setting-out, first review line midline, level, the wire center line traffic control stake of root Ju and vertical control point are being faced upward
It is high that slope surface identifies tunnel center line and bowed out top mark, and draws bowed out arc facing upward slope surface according to dark hole excavation contour line, as
It is oriented to the foundation of wall formwork erection, the height for being oriented to external mold within the walls is controlled according to the mileage of guiding wall, and reserve corresponding settling amount；
Step S2 faces upward slope molding and leads arch construction operation platform, according to design mileage, elevation and radius, excavate finishing face-upward slope and
Hole Core Soil is all satisfied its bearing capacity, compactness, radian and leads arch bed die requirement, and excavation leads skewback plinth, builds mortar flag stone
Basis is laid with bamboo slab rubber as arch construction bottom die plate is led on Core Soil, erects I-steel steelframe according to design, be welded to connect muscle
And orifice tube, installation lead arch side template and two side portions top template, pour and lead arch concrete；
Step S3 applies set arch, installs guide pipe；
The construction of step S4 drilling machine workbench, drilling machine construction podium level apply height lower than guiding wall, will excavate platform two sides
Deepened position in addition；
Step S5 drilling, is carried out using pipe shed drilling rig, and the height of drilling machine platform is wrong according to the controllable range of drilling machine and drilling
Hole (subdrilling odd number) is determined, since drill hole of drilling machine sequence is carried out by high hole location to low hole location, position of platform accordingly from upper and
Under gradually reduced, to meet drilling needs；
Step S6 pipe roof construction；
Step S7 closes excavation face, excavates face closure and uses wet shotcreting mode, forms wall for grouting, prevent slurry reflux from influencing
Slip casting effect；
Step S8 slip casting.
2. a kind of hole daguanpeng construction method according to claim 1, it is characterised in that: the step S3 applies set
Encircle, install guide pipe and include the following steps:
I-steel installation: to guarantee pipe roof construction rigidity, 4 Pin i-beam frames are set within the walls in guiding, every Pin steelframe is divided into five lists
Member, steelframe guarantees the radian of every section and size meets design requirement, every section steelframe both ends fishplate bar in succession, I-steel each unit
Couple blending bolt by connecting plate and connect firm, connecting plate is answered closely connected, examination is carried out after processing spells to check, every every end of Pin steelframe is total
4 sets of bolts, nuts are needed, should be set up in strict accordance with design middle line and horizontal position when steelframe is installed, the lower end of steelframe is located at firm
Stratum on, arch springing height lower than top excavate baseline below 15~20cm, arch springing excavate ultra-deep when, add steel plate or concrete
Cushion block, in concrete perfusion, steelframe should be covered all by concrete, and steelframe protective layer thickness is not less than 40mm, and steelframe is being processed
It should try to spell on cement floor after finishing, longitudinally be arranged using reinforcing bar circumferential direction spacing between 2 Pin steelframes, and couple securely with steelframe,
Steelframe is bottomed need to be placed on firm basement rock, when arch springing excavates ultra-deep, need to add steel plate or concrete pad；
Guide pipe is embedded: after the completion of i-beam frame is set up, carry out the embedded of guide pipe, circumferential spacing depending on pipe canopy spacing,
Guide pipe is subjected to displacement in concrete perfusion in order to prevent, and guide pipe is connected on i-beam frame according to design requirement, installation
When guide pipe, the circumferential spacing and lengthwise position of guide pipe are controlled, to meet design requirement, can first be demarcated in i-beam frame top surface
The position of guide pipe out, and guide pipe is arranged by spacing, deflection requirement, guide pipe is longitudinal to need consistent, extrapolation with line direction
Angle angle is 1 °~3 °, in order to avoid pipe shed drilling rig drilling intrusion tunnel cutting section, mortar enters simultaneously when to avoid concrete from being poured
Guide pipe is blocked, need to be pushed against with end mould when guide pipe is installed and is secured firmly to it on mould of end；
Template installation: being bolted between set arch steel form, and smoother to ensure to be oriented to mould within the walls, guiding wall end head formwork is adopted
It is installed with plank, connection uses dog or steel nail using adding back up mode to be reinforced between plank between plank sheathing and steel form
It is connected firmly, checks that template size is smooth except elevation of top surface deviation, guiding wall marginal position deviation, template before installation template
Degree, template surface faulting of slab ends deviation, template installation need solid and reliable, template and concrete surface brushing release agent；
Concrete casting: before concrete casting, need to again check template, guide pipe, and make calibration, the middle line of template,
Horizontal and size meets design requirement, template installation and bracket secure rigid, and set arch is poured using concrete, concrete it is unified by
Mixing station centralizedly supply, concrete fill vehicle transport, and hand fit's machinery be poured and makes firm by ramming closely knit, and casting sequence is from arch springing two sides
Symmetrical casting, until vault；
Concrete demoulding and maintenance: after concrete is poured, need to be conserved in time, and curing age must not be less than 7 days, coagulation
Native intensity reach design strength 70% after remove non-bearing template and Side Template, intensity reach design strength 100% after tear open
Except internal model and bracket.
3. a kind of hole daguanpeng construction method according to claim 2, it is characterised in that: the step S6 pipe roof construction
Include the following steps:
Borehole cleaning and down tube immediately after pore-forming, in order to avoid because the hole that collapses causes to can not be successfully installation due to blocking in hole, when down tube, need to set up foot
Hand cradle platform is aided with digging machine ejection manually to push and pull based on jacking,
Pipe canopy steel splitting pipe and steel floral tube, when construction, first set steel floral tube and cementing slurries, play steel pipe, then to check the spray of molten steel
The grouting quality of pipe,
Pipe canopy carries out cleaning bottom of hole, borehole cleaning, dross in cleaning hole with high-pressure blast device to hole is interior in a pre-installation, it is ensured that aperture, hole depth conform to
It asks, prevents plug-hole, pipe canopy is installed using jacking, section by section spreading, and the joint steel pipe for spreading tube coupling is logical with hot rolled seamless steel tube
It crosses outer thread button and interior thread button is attached, in order to improve the bending resistance of pipe canopy, steel reinforcement cage is added in pipe canopy, main reinforcement is adopted
With overlap joint connection, side item connection.
4. a kind of hole daguanpeng construction method according to claim 3, it is characterised in that: the S8 grouting includes
Following steps:
Pipe canopy and steel reinforcement cage carry out slip casting after being installed, injecting paste material uses cement slurry, ratio of mud 1:1, grouting sequence original
It is carried out on then from low hole location to high hole location, complete opening uses disposable slip casting, fills steel pipe using cement mortar after slip casting；
Since pipe canopy spacing is smaller, cause adjacent steel floral tube hole stifled to avoid occurring when slip casting string hole when geological condition is poor
Plug, hole-specifically slip casting, while slurries being allowed to be diffused filling in loose country rock, broken rock stratum is consolidated, is conducive to adjacent
Chip off-falling is reduced in drilling in hole, avoids that bit freezing occurs or falls bore, fall pricker phenomenon, is conducive to accelerate construction progress；
Injected hole blocks mode: being coupled using steel plate in steel pipe opening and is blocked, reserve Grouting Pipe and exhaust pipe, Grouting Pipe installs valve
Door, plug closing is tight, grouting mode: in the direct slip casting of Guan Pengkou.
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| CN201910601404.9A CN110331992A (en) | 2019-07-03 | 2019-07-03 | A kind of hole daguanpeng construction method |
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| CN111140257A (en) * | 2020-01-10 | 2020-05-12 | 中国水利水电第四工程局有限公司 | Advanced support method and equipment |
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| CN113107539A (en) * | 2021-05-11 | 2021-07-13 | 青岛理工大学 | Optimal thickness calculation method for pipe shed reinforcement area |
| CN113404517A (en) * | 2021-08-03 | 2021-09-17 | 福建工程学院 | Construction method for mud-bursting and water-flushing of tunnel |
| CN113700437A (en) * | 2021-09-01 | 2021-11-26 | 中交第二航务工程局有限公司 | Tube-following drilling device for soft rock tunnel tube shed and construction method |
| CN114635716A (en) * | 2022-05-17 | 2022-06-17 | 中国建筑第六工程局有限公司 | Pipe shed advanced supporting method with built-in section steel and application thereof |
| CN114658449A (en) * | 2022-04-29 | 2022-06-24 | 中国一冶集团有限公司 | Tunnel underground excavation pipe shed guide pipe drilling construction precision control method |
| CN114961748A (en) * | 2022-06-23 | 2022-08-30 | 中铁九局集团第三建设有限公司 | Construction method of large pipe shed guide wall at tunnel opening of shallow tunnel |
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| CN110778337B (en) * | 2019-11-09 | 2020-12-25 | 黄河勘测规划设计研究院有限公司 | Fabricated steel segment template construction method suitable for rapid lining of circular tunnel |
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| CN111827879A (en) * | 2020-07-03 | 2020-10-27 | 北京中煤矿山工程有限公司 | Horizontal drilling construction method for large-diameter pipe shed in shallow-earth-covered weak stratum |
| CN111827879B (en) * | 2020-07-03 | 2022-04-08 | 北京中煤矿山工程有限公司 | Horizontal drilling construction method for large-diameter pipe shed in shallow-earth-covered weak stratum |
| CN113107539B (en) * | 2021-05-11 | 2022-07-26 | 青岛理工大学 | Optimal thickness calculation method for pipe shed reinforcement area |
| CN113107539A (en) * | 2021-05-11 | 2021-07-13 | 青岛理工大学 | Optimal thickness calculation method for pipe shed reinforcement area |
| CN113404517A (en) * | 2021-08-03 | 2021-09-17 | 福建工程学院 | Construction method for mud-bursting and water-flushing of tunnel |
| CN113404517B (en) * | 2021-08-03 | 2023-09-22 | 福建工程学院 | Construction method for tunnel mud bursting and water flushing |
| CN113700437A (en) * | 2021-09-01 | 2021-11-26 | 中交第二航务工程局有限公司 | Tube-following drilling device for soft rock tunnel tube shed and construction method |
| CN113700437B (en) * | 2021-09-01 | 2023-12-08 | 中交第二航务工程局有限公司 | Soft rock tunnel pipe shed and pipe following drilling device and construction method |
| CN114658449A (en) * | 2022-04-29 | 2022-06-24 | 中国一冶集团有限公司 | Tunnel underground excavation pipe shed guide pipe drilling construction precision control method |
| CN114658449B (en) * | 2022-04-29 | 2024-11-01 | 中国一冶集团有限公司 | Control method for drilling construction precision of guide pipe of tunnel underground excavation pipe shed |
| CN114635716A (en) * | 2022-05-17 | 2022-06-17 | 中国建筑第六工程局有限公司 | Pipe shed advanced supporting method with built-in section steel and application thereof |
| WO2023174439A1 (en) * | 2022-06-23 | 2023-09-21 | 中铁九局集团第三建设有限公司 | Construction method for large pipe shed guide wall at shallow tunnel portal |
| CN114961748B (en) * | 2022-06-23 | 2023-03-10 | 中铁九局集团第三建设有限公司 | Construction method of large pipe shed guide wall at tunnel opening of shallow tunnel |
| CN114961748A (en) * | 2022-06-23 | 2022-08-30 | 中铁九局集团第三建设有限公司 | Construction method of large pipe shed guide wall at tunnel opening of shallow tunnel |
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