CN109779638A - A kind of double-shielded TBM card machine processing method - Google Patents
A kind of double-shielded TBM card machine processing method Download PDFInfo
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- CN109779638A CN109779638A CN201811628147.XA CN201811628147A CN109779638A CN 109779638 A CN109779638 A CN 109779638A CN 201811628147 A CN201811628147 A CN 201811628147A CN 109779638 A CN109779638 A CN 109779638A
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Abstract
The invention belongs to granite to tunnel processing technology field, disclose a kind of double-shielded TBM card machine processing method, take and pull open flexible shield, and the method that pilot tunnel is excavated at top first digs, then the mode of pilot tunnel, from vault to two sides partial excavation；Flexible shield longitudinal extent scarfing cinder is first carried out, realizes that TBM gets rid of poverty, when still can not get rid of poverty after the completion of flexible shield range cleaning, first carries out flexible shield longitudinal extent scarfing cinder；It draws slag and clears up circumferential section range by the progress of -2 o'clock direction of TBM excavated section at 23 points；It draws in slag cleaning and is carried out by the way of the supporting when excavating, the support equipment of supporting is arranged along excavated section groined type.It quickly gets rid of poverty this invention ensures that collapsing body, solves and be unable to the problems such as accurate judgement causes the geology of card machine to collapse the property of body, range at present.
Description
Technical field
The invention belongs to granite driving processing technology field more particularly to a kind of double-shielded TBM card machine processing methods.
Background technique
Currently, the prior art commonly used in the trade is such that
Lanzhou water head site TBM1 from March 9 (pile No. T8+836.2) tunnel by presinian system gag bit mountain group quartz-schist into
Enter Caledonian Granite section, so far, steadily tunnel 363.2m in granite section, during which experienced the complete joint of rock and do not send out
II class surrounding rock (hard rock section) educated, III class surrounding rock of country rock local stability difference and IV class surrounding rock (soft rock of joint intensive development
Section).
At morning 5 on the 23rd in March, 57 divide at driving to 4220 ring 1.2m, it may be assumed that when at pile No. T9+199.5m, TBM is tunneled out
Now abnormal: cutterhead rotation is normal, but thrust reaches 8000KN~10000KN, and pile penetration is but rapidly reduced to 0mm/r, driving
Speed is reduced to 0m/min.
After interior flexible shield pulls open 20cm, in 23 points~2 o'clock range, anterior shield and flexible shield are pushed down in granitic mass slump,
There are a large amount of debris to accumulate at the top of flexible shield, determines that TBM anterior shield, flexible shield are blocked by top wedge shape granite slump, lead to TBM
It can not tunnel.
According to tunneling data data is collected and surveyed, after site inspection, determine that this card machine belongs to driving to the medium hair in joint
Educate, the Caledonian Granite section of country rock local stability difference, since granite joint is relatively developed, along tunneling direction to vertical
There are multiple groups cross joint, TBM is larger to country rock disturbance in tunneling process in hole axis direction, leads to wall rock destabilization slump, blocks
Firmly shield body causes TBM that can not tunnel.
In conclusion problem of the existing technology is:
In the prior art, being unable to accurate judgement causes the geology of card machine to collapse the property of body, range etc., collapses to being likely to occur
Sunken body cannot work out different disposal prediction scheme, and the slump body to appearance is caused to implement to get rid of poverty.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of double-shielded TBM card machine processing methods.
The invention is realized in this way a kind of double-shielded TBM card machine processing method, double-shielded TBM card machine processing side
Method includes:
It takes and pulls open flexible shield, the method that pilot tunnel is excavated at top first digs, then the mode of pilot tunnel, divides from vault to two sides
It excavates in portion；
Slump body at the top of shield body is removed, flexible shield longitudinal extent scarfing cinder is first carried out, realizes that TBM gets rid of poverty, shield range of stretching is clear
When still can not get rid of poverty after the completion of reason, pilot tunnel is being excavated to anterior shield direction；It draws slag and clears up circumferential section range by TBM excavated section
23 points -2 o'clock directions carry out；It draws in slag cleaning and is carried out by the way of the supporting when excavating, the support equipment of supporting is along excavation
Section groined type arrangement.
Further, the method for excavation pilot tunnel includes: at the top of flexible shield
The first step, crown section choose mouth construction: before choosing mouth, rely at host belt and set up simple rack, it is disconnected for subsequent upper half
Pilot tunnel construction in face provides job platform；Partial excavation from bottom to top；In flexible interior shield slit aperture, carry out choosing mouth construction；Vault four
All symmetrical excavate form left and right space, and carry out supporting using the lumps of wood, plank, set up temporary support foothold platform；Into stretching
Contract outer shield top progress section excavation；Then continue to excavate to face direction, the supporting when excavating, until digging through；
Remaining arc section Enlargement excavation: second step is excavated and is excavated unanimously with gib mode and first step portion；Completion pair
The interim lumps of wood, plank supporting.
Further, stretching before pilot tunnel is excavated at shield top needs to carry out country rock cleaning: by adjusting oil cylinder stroke, by external extension shield
It is pulled open at notch ring between branch pole, exposes country rock；
It clears up, until pulling open to bare rock, is excavated along tunneling direction side branch protective edge, until getting rid of poverty when pulling open.
Further, it needs to carry out TBM equipment protection before country rock cleaning, pull open flexible shield:
Before carrying out country rock excavation in flexible interior shield retraction gap, neighbouring oil cylinder, pipeline and cable machinery are protected,
Protective materials selects thickness 50mm plank, belt and steel mesh；When flexible shield opens 600mm, encircles 90 degree of ranges the bottom of except and do reinforcing bar
Net protection is outer, and band iron is welded at other positions between shield and branch pole of stretching；Belt is laid in flexible shield bottom 180 degree range
And plank, the scarfing cinder platform upper put up are laid with plank；
It pulls open in flexible shield, first pulls open flexible shield 20cm, analyze the integrality of country rock, if exist and gush slag；
It is cleared up when pulling open, until when pulling open to 600mm, within the scope of bare rock 600mm, after carrying out supporting, along
Tunneling direction side branch protective edge excavates, until getting rid of poverty.
Further, it needs to carry out operation platform in flexible shield region before TBM equipment protection to set up:
Operation platform uses scaffold+plank form, and scaffold is using host belt feeder or in flexible shield internal junction
It is welded on component, carries out transverse and longitudinal arrangement, scaffold transverse and longitudinal spacing is not more than 1m*1m；Scaffold, which is formed, to be supported and is laid with plank, together
When plank is fixed on scaffold.
Further, the construction method of slag cleaning is drawn using endless form, and specifically include: construction ventilation punchinges, slags tap, propping up
It protects, punching, slagging tap, supporting.
Further, it after TBM gets rid of poverty, also needs to carry out landslide section post-processing: cavity backfill is carried out using rockfill grouting construction.
Further, after TBM gets rid of poverty recovery driving, heat absorption plate core structure piece is installed to TBM card machine region.
Another object of the present invention is to provide a kind of double-shielded TBMs for implementing the double-shielded TBM card machine processing method
Card machine processing equipment.
In conclusion advantages of the present invention and good effect are as follows:
It quickly gets rid of poverty this invention ensures that collapsing body, using small pilot tunnel is excavated at the top of flexible shield, removes slump at the top of shield body
The prediction scheme of getting rid of poverty of body.Cause the geology of card machine to collapse the property of body, range etc. because being unable to accurate judgement at present, collapses to being likely to occur
It falls into volume property and works out different disposal prediction scheme, adjust embodiment in time according to field condition.
Detailed description of the invention
Fig. 1 is double-shielded TBM card machine processing method flow chart provided in an embodiment of the present invention.
Fig. 2 is upper half section pilot tunnel partial excavation figure provided in an embodiment of the present invention.
Fig. 3 is first step schematic diagram in upper half section pilot tunnel construction technology process provided in an embodiment of the present invention.
Fig. 4 is second step schematic diagram in upper half section pilot tunnel construction technology process provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
In the prior art, being unable to accurate judgement causes the geology of card machine to collapse the property of body, range etc., collapses to being likely to occur
Sunken body cannot work out different disposal prediction scheme, and the slump body to appearance is caused to implement to get rid of poverty.
To solve the above problems, being described in detail below with reference to scheme to application principle of the invention.
Below with reference to concrete construction method, the invention will be further described.
As shown in Figure 1, double-shielded TBM card machine processing method provided in an embodiment of the present invention includes: to take to pull open flexible shield,
The method that pilot tunnel is excavated at top, first digs, then the mode of pilot tunnel, from vault to two sides partial excavation；
Slump body at the top of shield body is removed, slag cleaning longitudinal extent is drawn and first carries out flexible shield range cleaning, realize that TBM gets rid of poverty,
When still can not get rid of poverty after the completion of flexible shield range cleaning, then carry out anterior shield range cleaning；Draw slag clear up circumferential section range by
23 points -2 o'clock direction of TBM excavated section carries out；It draws in slag cleaning and is carried out by the way of the supporting when excavating, the branch of supporting
Equipment is supportted to arrange along excavated section groined type.
It specifically includes:
S101: operation platform is set up in flexible shield region；
S102:TBM equipment protection pulls open flexible shield；
S103: country rock cleaning；
S104: pilot drive；
S105: slag cleaning is drawn；
S106: landslide section post-processing；
S107:TBM gets rid of poverty, recovery is tunneled.
In step S101, in order to guarantee TBM equipment protection, crag cleaning, surrounding rock supporting, draw the enough construction skies of slag cleaning
Between, before all working development, operation platform has been set up in flexible shield region.
Operation platform uses scaffold+plank citation form, and scaffold is using host belt feeder or in flexible shield
It is welded on portion's structural member, carries out transverse and longitudinal arrangement, scaffolding structure requirement is compact, and transverse and longitudinal spacing is not more than 1m*1m.Scaffold is formed
Plank is supported and be laid with after consolidating, while plank being fixed on scaffold, main force area, which thickeies, is laid with plank, plank requirement
It is laid with close.
Step S102TBM equipment protection, pulling open flexible shield includes:
Before carrying out country rock excavation in shield retraction gap in flexible, need to the equipment such as neighbouring oil cylinder, pipeline and cable into
Row protection, protective materials select thickness 50mm plank, belt and steel mesh.When flexible shield opens 600mm, except 90 degree of ranges are encircleed at bottom
It is outer to do steel mesh protection, band iron is welded at other positions between shield and branch pole of stretching, and sets to prevent exposed stone from falling to injure by a crashing object
It is standby and injure construction personnel by a crashing object.It is laid with belt and plank in flexible shield bottom 180 degree range, the scarfing cinder platform upper paving put up
If plank, to guarantee the construction personnel near platform and the safety of equipment.
20cm is first pulled open, the integrality of country rock is observed, if country rock is more open, does not constitute and gushes slag phenomenon, first by top
Unconsolidated rock dig out, until the complete rock of joints development can be seen, after having cleared up fractured rock, carry out slump with pneumatic pick
Body is removed, subsequent cleaning two sides rock slag.If country rock is excessively loose, composition gushes slag phenomenon, and needing as early as possible will flexible interior shield recycling
In place.
It is cleared up when pulling open, until when pulling open to 600mm, within the scope of bare rock 600mm, after carrying out supporting, along
Tunneling direction side branch protective edge excavates, until getting rid of poverty.
Country rock cleaning is carried out from top to bottom by manually holding drill rod and pneumatic pick, clears up slag charge by manually being filled from shield body with well-bucket
It is transported on operation platform, then the slag charge in well-bucket is delivered to cinder field outside hole down on host belt.
Step S103 country rock is cleared up
It by adjusting oil cylinder stroke, will be pulled open at the notch ring between external extension shield and branch pole, expose country rock.
Step S104 pilot drive includes:
Pilot drive takes first pilot tunnel, then the mode digged is implemented.To ensure to choose construction safety at mouth, pilot drive is used
From vault to two sides partial excavation.
When shield is pulled open to 600mm in flexible, support work is carried out for exposed country rock, if country rock is relatively complete
In the case of, using soft support pattern, the checkered steel plate for being 1m with width welding, which is blocked, carries out gib, if country rock is relatively more broken
It is broken, after rubble is completed in processing, drill with the drilling rod of φ 25 and play anchor pole operation, 2-3 meters of hole depth, and carried out with Anchor Agent
Locking processing；Or it according to on-site actual situations, is crushed area in -2 point ranges at 11 points, steel mesh supporting, reinforcing bar can be carried out
Net supporting notices that mesh sheet root is locked with anchor pole gasket.Upper half section pilot tunnel partial excavation figure such as Fig. 2.
Specifically have:
1. the first step is excavated as shown in Figure 3, i.e., crown section chooses mouth construction.Before choosing mouth, relies at host belt and set up letter
Easy rack provides job platform for the construction of subsequent upper half section pilot tunnel.Man-hour manually hand-held pneumatic pick partial excavation from bottom to top.Exist first
Shield slit aperture in flexible carries out choosing mouth construction；Vault surrounding, which is symmetrically excavated, forms 1m (longitudinal direction) × 0.8m (ring width) × 1m (height)
Left and right space, and supporting is carried out using 200mm × 200mm lumps of wood, 50mm solid wood, it sets up platform and stops over as temporary support
Point.Platform Requirements laying is close, smooth, firm, is connected and fixed mode using dog between the lumps of wood and the lumps of wood, the lumps of wood and plank.
Then it is manually entered at the top of flexible outer shield and carries out 1. number section excavation.
Then continue to excavate to face direction, the supporting when excavating, every excavation 50cm carries out once supporting, until digging
It is logical.
2., 2. second step digs in Fig. 4 ' region, i.e., remaining arc section Enlargement excavation.It excavates and gib mode and the
Excavate consistent in one step portion.It completes to the interim lumps of wood, plank supporting.
In embodiments of the present invention, upper half section pilot drive construction technology process are as follows:
One), such as Fig. 3,1. portion's excavation supporting
Apply the section advance support (120 ° of vault primary completions)；
1. portion's country rock is excavated, gib is carried out using 20cm × 20cm lumps of wood and 5cm solid wood；
It is excavated to actual size, takes gib；
Set up plank ceiling.
Two) continue to construct to face direction, until getting through；
Three), such as Fig. 4,2. portion excavate, supporting
2. portion's country rock is excavated, gib is carried out using 20cm × 20cm lumps of wood and 5cm solid wood；
It is excavated to actual size, takes gib；
Set up plank ceiling.
It arranges special messenger to monitor the variation of the area Tao Zha periphery hydrogeology in digging process, underground water increase occurs, water quality becomes
It is withdrawn immediately when the abnormal conditions such as muddy and collapsing and breaking to safety area.
If during processing, encountering bulk sphenoid in hole, then hydraulic rock splitting machine is utilized, to large volume sillar
It is crushed, is broken into fritter, cleared up to belt feeder, transport outside hole.Sillar joint, crack are preferentially looked for when crushed stone, are improved
Broken speed.
Step S105 draws slag cleaning
(1) slag cleanup area and basic mode are drawn
Slag cleaning longitudinal extent is drawn to carry out (first carrying out flexible shield range 2.75m by flexible shield (2.75m)+anterior shield (1.73m)
Cleaning when still can not get rid of poverty after the completion of flexible shield range cleaning, is carrying out the cleaning of anterior shield range to realize that TBM gets rid of poverty), it draws
Slag is cleared up circumferential section range and is carried out by 23 points -2 o'clock direction of TBM excavated section, and slag cleaning thickness 1.2m--1.5m is drawn.
It draws slag cleaning to carry out by the way of the supporting when excavating, supporting is supported using the 20cm*20cm lumps of wood, and edge is opened
Section groined type arrangement is dug, longitudinal pitch 50cm uses 20#A I-shaped bracing members when necessary.
(2) construction technology (circulation)
Construction ventilation → punchinging → slag tap → supporting → punching → slag tap → supporting；
(3) supporting construction includes:
Must follow up gib in digging process, and supporting is supported using the 20cm*20cm lumps of wood, along excavated section well
Font arrangement, longitudinal pitch 50cm use 20#A I-shaped bracing members, top rebars net closing (8 steel mesh of ∮, between grid when necessary
Away from 100mm*100mm；20#A I-shaped bracing members, circumferential spacing 500mm).
The lumps of wood supports construction technology: directly with progress is excavated, situ configuration electric saw carries out live cutting according to required specification.
(4) construction drainage:
Construction drainage is matched after being passed through using the mating water pump of TBM using at catch pit method pump drainage to tail shield or flexible shield bottom
Set draining steel pipe pump drainage.
Upper half section pilot tunnel constructs water, electricity used etc. by the offer of TBM equipment.
(5) construction ventilation:
In card machine section processing stage, ventilating system will keep working well in main hole.
Due to card machine section narrow space, at the position, ventilation is blown using air blower, and the dirt replaced in narrow environment is empty
Gas.Air blower is placed on front-axle beam travelling platform, and air blower selects p=250w, mating snakeskin hose air supply tube.
Step S106 landslide section post-processing include:
After getting rid of poverty, for the landslide voiding issues in the region, it is proposed that carry out cavity backfill using rockfill grouting construction.
Step S107TBM gets rid of poverty, restores driving
Disturbance when to reduce cutterhead rotation to country rock, it is ensured that the overall stability of upper half section support system, TBM cutterhead
Driving uses frequency converter mode, and cutterhead revolving speed takes 2~3r/min.Driving reduces support boots oil cylinder based on single shield mode simultaneously
Disturbance to country rock.Boring parameter goes out according to the principle of " slow-speed of revolution, low-thrust, low pile penetration, continuous driving ", in conjunction with belt feeder
Slag situation adjusts in time.
After TBM gets rid of poverty recovery driving, heat absorption plate core structure piece is installed to TBM card machine region.
Digging control measure is as follows:
1. before restoring driving, bolt grouting is beaten in face and reinforces country rock, in case face rock is secondary to collapse card machine.
2. starting after restoring driving, strict control keeps, adjusts TBM posture, ensures TBM when passing through to greatest extent
" do not bow, not sideslip " pays close attention to axis line track in tunneling process, when direction is difficult to control slowly, ensure guiding value
Meet regulation to retract and tunnel again when the single cycle driving completion deviation of directivity transfinites.
3. shield body enters after country rock the preformed hole made full use of in shield body, to the contact surface injection waste oil of shield body and country rock,
The frictional force of the greasing substances such as bentonite reduction shield body and country rock.
4. after the completion of one circulation of every driving, shift engineer enters cutterhead observation face country rock situation, verifying is advanced
Detection and geologic prediction result situation.
5. paying close attention to slag discharge amount, forbid largely to slag tap in the case of no propulsion, in tunneling process on moment concern 1# belt feeder
It slags tap situation, after the completion of circulation driving, verifies drag-out slag car number in time, calculate whether slag discharge amount is controllable.
Application principle of the invention is further described below with reference to resource distribution.
1 labour configuration
Deployed according to task overall, TBM card machine get rid of poverty treatment people configuration (being shown in Table 2).
Unfavorable geology TBM gets rid of poverty, and working procedure is more, and project amount is larger, carries out eight-hour shifts, per tour after whole day thus
It sets up TBM to get rid of poverty shock brigade, the following are the detailed construction personnel's configurations of per tour.
Per tour construction personnel allocation list (8 hours working times)
Table 2
2 main mechanicals put into situation
Construction equipment allocation list
Table 3
Indicate: platform trailer, 16T door machine and fork truck are mainly used for TBM and get rid of poverty required equipment and materials shipping work of constructing；Turn
Slag crust band machine is mainly used for artificial scarfing cinder transhipment work；Backacter is mainly used for cinder field cleaning rock ballast work.
3 construction materials put into situation
Construction material allocation list
Table 4
Application principle of the invention is further described below with reference to Safety assurance measures.
(1) work progress safety monitoring
Project management department carries out security official footman's system during drawing slag operation, and operating area can go out because of its special construction location
The case where existing air feed is insufficient and foul atmosphere can not arrange operation interval, Security Officer need to monitor the gas inspection for drawing slag region at any time
It surveys, observes the working condition of ventilation apparatus, air supply line emphatically, footman security official has the right to prevent live work when there are special circumstances
Industry.
When determining country rock situation is loose condition (of surface), the mode that scene needs tissue to carry out chemical grouting carries out loose wall rock
Layering is carried out after consolidation grouting again and draws slag, the chemical substance that when chemical grouting generates, safety work personnel need to utilize gas at any time
Detection device detects working region in time, and every 2h detection is primary, more than stopping working after specified value, carries out again after being disposed
Construction.
(2) deformation monitoring
Survey crew detects the deformation of the surrouding rock deformation of excavation face, operating area lumps of wood supporting deformation and shield body, existing
Field measures the different distortion that country rock occurs at any time, and every 2h detection is primary after excavating normally, the leader responsible with scene reflection in time
The deformation of appearance, in a manner of determining the processing of next step country rock.
(3) exercise leadership cadres duty system, forward commander, implements scene implementation capacity.
Scarfing cinder operation carries out under the guidance of team leader on duty and section chief, and drawing slag operating personnel will obey without questioning, must not be with a
People's experience changes without authorization draws slag scheme；Group arranges special messenger to clear up upper back slump to field conditions, the leakage slag during drawing slag
Situation of the situation of change, shield body that body occurs during drawing slag is observed at any time, is monitored, and reports situation of change to leader in time.
(4) construction organization will ensure harmonious orderly, construction and maintenance must not parallel operations, prevent mechanical equipment because of maloperation
And it hurts sb.'s feelings；During entire scarfing cinder, monitor country rock and hydrological variation situation personnel must keep in communication with work team head it is unimpeded,
And remaining the personnel of progress do not forbid from operating area too far；
(5) when pilot drive, strict control excavation technology, according to shallow bore hole, few drilling depth, strong supporting, multicycle principle into
Row is constructed, and carries out supporting in time after excavation；
(6) secondary dig carries out from top to bottom, and when excavation does not occur larger hanging body by the feet as far as possible.Country rock notes abnormalities when excavating
Situation stops in time, excavates again after supporting processing.The loosening block occurred in country rock digging process uses pneumatic pick to reject in time,
Reduce the security risk in digging process；
(7) secondary to dig preceding progress advance support, system supporting is carried out after digging in time, supporting carries out next again after the completion
Circulation is excavated, and excavation must carry out under conditions of having safety support；
(8) when relieving, team leader on duty, section chief, operating personnel need to explain this class of working condition and attention to next teams and groups
Item；
(9) strict construction discipline reinforces the command and control at scene, establishes the guiding theory of " steering a steady course, safety first ",
Prevent blindly to rob progress；
(10) reinforce power consumption management inside and outside hole.Conscientiously the erection standard of illumination, high-voltage electric power circuit is executed, guarantees that insulation is good
It is good.Various motor machines and electrical equipment are respectively provided with earth leakage protective device, it is ensured that Electrical Safety.
(11) country rock pre-processes: it taps, the country rock body of the loosening around cleaning work place, it can after confirmation safety
Operation, reaching safety condition can construct.
(12) material directly contact skin and eyes are avoided, such as enter eyes accidentally, should be rinsed immediately with a large amount of water, and
It sees a doctor in time；After contacting skin, contact site should be rinsed with a large amount of clean waters immediately.
(13) operating personnel must require safe wearing protection in strict accordance with project management department's safety work regulation and relevant station
Articles.
(14) to check whether pump is problematic before slip casting turn on pump, whether surrounding has obstacle, and whether personnel all stand in safety
Place, it is believed that can slip casting all after no problem.
(15) drilling operation regulation must be abided by by applying brill personnel, prevented barbarous construction, should be cooperated, cooperate between personnel,
Accomplish personnel and machine security.
(16) scene is equipped with security official, establishes safe construction record, handles security risk in time.It is logical in time if any exception
Know that personnel withdraw, while returning relevant departments and individual.
(17) the maintenance maintenance work of grouting pump is carried out, it is ensured that equipment works normally, and does not stay security risk.
(18) connection at slip casting working face and grouting pump must be set up constantly intercom system, accomplish to communicate the moment it is unimpeded,
Open filling and when termination of pumping have to obtain after other side clearly confirm can operation, forbid the feelings that more people commanders signalling and act rashly occur
Condition occurs.
(19) other unaccomplished matters are executed in strict accordance with associated safety regulation and corresponding regulation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. a kind of double-shielded TBM card machine processing method, which is characterized in that the double-shielded TBM card machine processing method includes:
It takes and pulls open flexible shield, the method that pilot tunnel is excavated at top first digs, then pilot tunnel, from vault to two sides partial excavation；
Slump body at the top of shield body is removed, flexible shield longitudinal extent scarfing cinder is first carried out, realizes that TBM gets rid of poverty, flexible shield range has been cleared up
When still can not get rid of poverty after, pilot tunnel is being excavated to anterior shield direction；It draws slag and clears up circumferential section range by TBM excavated section 23
The o'clock direction of point -2 carries out；It draws in slag cleaning and is carried out by the way of the supporting when excavating, the support equipment of supporting is disconnected along excavating
Face groined type arrangement.
2. the double-shielded TBM card machine processing method as described in right 1, which is characterized in that excavate the method for pilot tunnel at the top of flexible shield
Include:
The first step, crown section choose mouth construction: before choosing mouth, relying at host belt and set up simple rack, lead for subsequent upper half section
Hole construction provides job platform；Partial excavation from bottom to top；In flexible interior shield slit aperture, carry out choosing mouth construction；Vault surrounding pair
Claim to excavate and form left and right space, and supporting is carried out using the lumps of wood, plank, sets up temporary support foothold platform；Into outside flexible
Section excavation is carried out at the top of shield；Then continue to excavate to face direction, the supporting when excavating, until digging through；
Remaining arc section Enlargement excavation: second step is excavated and is excavated unanimously with gib mode and first step portion；It completes to interim
The lumps of wood, plank supporting.
3. double-shielded TBM card machine processing method as described in claim 1, which is characterized in that before excavating pilot tunnel at the top of flexible shield
It need to carry out country rock cleaning: by adjusting oil cylinder stroke, will be pulled open at the notch ring between external extension shield and branch pole, exposing is enclosed
Rock；
It clears up, until pulling open to bare rock, is excavated along tunneling direction side branch protective edge, until getting rid of poverty when pulling open.
4. double-shielded TBM card machine processing method as claimed in claim 3, which is characterized in that progress TBM is needed to set before country rock cleaning
Flexible shield is pulled open in standby protection:
Before carrying out country rock excavation in flexible interior shield retraction gap, neighbouring oil cylinder, pipeline and cable machinery are protected, protected
Material selection thickness 50mm plank, belt and steel mesh；When flexible shield opens 600mm, steel mesh is made except bottom 90 degree of ranges of arch and is prevented
Shield is outer, and band iron is welded at other positions between shield and branch pole of stretching；Belt and wood are laid in flexible shield bottom 180 degree range
Plate, the scarfing cinder platform upper put up are laid with plank；
It pulls open in flexible shield, first pulls open flexible shield 20cm, analyze the integrality of country rock, if exist and gush slag；
It is cleared up when pulling open, until when pulling open to 600mm, within the scope of bare rock 600mm, after carrying out supporting, along driving
Direction side branch protective edge excavates, until getting rid of poverty.
5. double-shielded TBM card machine processing method as claimed in claim 4, which is characterized in that need to be stretched before TBM equipment protection
Operation platform is set up in contracting shield region:
Operation platform uses scaffold+plank form, and scaffold is using host belt feeder or in flexible shield inner structural members
Upper welding, carries out transverse and longitudinal arrangement, and scaffold transverse and longitudinal spacing is not more than 1m*1m；Scaffold, which is formed, to be supported and is laid with plank, simultaneously will
Plank is fixed on scaffold.
6. double-shielded TBM card machine processing method as described in claim 1, which is characterized in that the construction method for drawing slag cleaning is adopted
With endless form, specifically include: construction ventilation punchinges, slags tap, supporting, punchinges, slags tap, supporting.
7. double-shielded TBM card machine processing method as described in claim 1, which is characterized in that after TBM gets rid of poverty, also need to collapse
Square section post-processing: cavity backfill is carried out using rockfill grouting construction.
8. double-shielded TBM card machine processing method as described in claim 1, which is characterized in that TBM gets rid of poverty after recovery driving, right
TBM card machine region is installed by heat absorption plate core structure piece.
9. a kind of double-shielded TBM card machine processing equipment for implementing double-shielded TBM card machine processing method described in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811628147.XA CN109779638A (en) | 2018-12-28 | 2018-12-28 | A kind of double-shielded TBM card machine processing method |
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| CN110469340A (en) * | 2019-09-27 | 2019-11-19 | 中国水利水电第十工程局有限公司 | A kind of rock burst tunnel double-shielded TBM card machine is got rid of poverty construction method |
| CN111119913A (en) * | 2020-02-24 | 2020-05-08 | 中铁二院工程集团有限责任公司 | TBM (tunnel boring machine) escaping processing method in tunnel construction and tunnel construction structure |
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Application publication date: 20190521 |