CN107091096A - Replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure - Google Patents
Replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure Download PDFInfo
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- CN107091096A CN107091096A CN201710345354.3A CN201710345354A CN107091096A CN 107091096 A CN107091096 A CN 107091096A CN 201710345354 A CN201710345354 A CN 201710345354A CN 107091096 A CN107091096 A CN 107091096A
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses replacing options in a kind of main driving seal failure hole of balancing earth-pressure shielding machine under normal pressure, including following process：The first step：Preparation before opening a position；Normal pressure changes sealing in second step, the hole that opens a position；3rd step：Sealing property is determined；4th step：Cleaning gear oil pocket and test chamber simultaneously change driving box gear oil；5th step：The regulation of follow-up driving points for attention.The present invention is without being hung to ground progress dismounting and change sealing by main driving and installing, it is done directly in hole, and short implementation cycle, cost are low, simple operable, shield owner driving seal failure under normal pressure need to be solved and change problem, substantially increase construction speed and operating efficiency, enterprise construction cost is reduced, enterprise competitiveness is improved, the solution for being worth using for reference that shield machine be can yet be regarded as the processing of same category of device failure one.
Description
Technical field
Soil pressure balance shielding under technical field, specially a kind of normal pressure is changed the present invention relates to shield driving owner driving sealing
Replacing options in structure owner driving seal failure hole.
Background technology
With the accelerated development for continuing to develop the continuous progress, especially urbanization that set science and technology of society, drive
The fast development that urban infrastructure and track traffic are wanted, during limited spatial surface is widely used, underground is empty
Between obtained continuous exploitation, balancing earth-pressure shielding machine construction is more and more applied in metro construction.
The general principle of shield tunnel be with a tangible steel components along Tunnel Design axis excavate the soil body and to
It is preceding to promote.This steel components is main to play the soil body, the guarantee operation that protection is excavated out before preliminary or final tunnel-liner is built up
Personnel and the effect of plant equipment safety, this steel components are called shield for short.Another effect of shield is can to bear to come
Pressure from stratum, prevents the invasion of underground water or quicksand.
Earth pressure balanced shield, EPBS belongs to closed shield, during shield driving, its front end cutterhead rotation digging ground layer soil body, under cutting
The soil body come enters soil cabin.When the soil body is full of soil cabin, its passive soil pressure and the soil pressure on digging face, hydraulic pressure are in a basic balance, make
The digging face of obtaining is in poised state (i.e. stable state) with shield face.Schematic diagram is as shown in the figure.As seen from the figure, this kind of shield leans on spiral shell
Native (i.e. digging spoir) dispatch will be cut to native case by revolving conveyer, be transported to earth's surface.By the slip mounted in conveying worm soil-discharging port
Gate or rotatable hopper control are unearthed and measured, it is ensured that digging face is stable.
Shield owner's drive system is the core system of shield machine, and main driving sealing is then the crucial portion of main drive system
Part, once seal failure, it will to equipment in itself and construction cause serious consequence.
During existing shield-tunneling construction, for it is main driving seal failure after situation, the scheme generally used for：On ground
Dig vertical shaft to reinforce, set up boom hoisting, cutterhead is dismantled, whole main drive assembly is hung to ground, then dismantled outside hole, more
Change sealing.Such treatment technology scheme is long in time limit, cost is high, influences very big to project construction.
Therefore it provides a kind of main driving seal failure of low, the safe and reliable balancing earth-pressure shielding machine of short implementation cycle, cost
Replacing options have been one and necessary studied a question in hole.
The content of the invention
In order to overcome the shortcomings of present in above-mentioned prior art, the present invention provides a kind of short construction period, and cost is low,
Safe and reliable, rip cutting driving seal failure main to balancing earth-pressure shielding machine can carry out the method changed in hole at ambient pressure.
The object of the present invention is achieved like this：
Replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure, including following process：First
Step：Preparation before opening a position；Normal pressure changes sealing in second step, the hole that opens a position；3rd step：Sealing property is determined；4th step：Cleaning
Gear oil pocket and test chamber simultaneously change driving box gear oil；5th step：The regulation of follow-up driving points for attention；
Preparation before the described first step opens a position, including：Shield stop position beats glass fiber post and perfusion from surface drilling
Stake is reinforced digs dewatering well precipitation simultaneously；Shield machine driving arrives stop position；Preceding middle shield note polyurethane, tail shield rear bull's eye, five rings
Position note dual slurry carries out sealing；By conveying worm, dregs output in native storehouse is changed into sealed space requirement to meet；
Calm the anger and be vented into native storehouse by shield machine equipment of itself；Gas in native storehouse is examined using gas detecting instrument before warehouse entry
Survey；Using plank to carrying out supporting at cutterhead opening, reinforcing, prevent the soil body from caving in；
The described second step normal pressure in hole that opens a position changes sealing, including：Two seals before removing；Detect sealed track abrasion feelings
Condition；Runway is raised；Dredge gear oil pocket, test chamber, each grease channel of HBW, EP2；Welded seal plate；Adhering and sealing；Install
Sealing and spacer ring；
The 3rd described step sealing property is determined, including the static bucktooth of sealing and sealing dynamic pressure measurement：To being sealed into for changing
Whether pressurize test and dynamic test under row is static succeed to verify that sealing is changed；Described 4th step cleaning gear oil pocket and
Test chamber simultaneously changes driving box gear oil, and gear oil pocket and test chamber are cleaned repeatedly including the use of No. 46 hydraulic oil；Sealing is dynamic
Driving box gear oil is changed after state test passes；
The 5th described step is formulated in shield machine later stage tunneling process after subsequently tunneling the regulation of points for attention, including sealing replacing
Monitoring, detection and application maintenance points for attention and maintenance operational procedure；
The described second step normal pressure in hole that opens a position changes sealing, possess including：External seal pressure ring is removed using instrument, frock is used
First of sealing is taken out, spacer ring is screwed into using M8 long bolts, spacer ring is pulled out using jack, taking out second using frock seals；
External seal runway abrasion detection, raises runway, concretely comprises the following steps：Clean close between anterior shield center ring and external seal runway
Fit-up gap is sealed, sealing wear depth on twice runway and height are detected using dial gauge, Steel Ruler and runway is calculated
The distance of up-regulation, is raised external seal runway using full silk hexagon socket head cap screw, and sealing fit-up gap is entered using dial bore gage
Row measurement is checked；
Gear oil pocket and each grease holes dredging of test chamber, are concretely comprised the following steps：The whole plugs of gear oil pocket OC1-8 and oil pipe are opened,
Air-blowing is carried out to each hole successively using 1bar air, until residual grease is all blown out inside each hole, above-mentioned side is used
Method is dredged to test chamber grease holes；
Welded seal plate：Because the O-shaped sealing strip between drive disk and external seal runway can not be carried out more after the up-regulation of external seal runway
Change, there may be the risk of gear oil leakage after being adjusted in order to avoid runway, and native storehouse muddy water enters gear by this sealing
Fuel tank, closing welding is carried out by the gap between the external seal runway and cutterhead flange after adjustment using 6mm curved plate；Adopt
Mode is connect with fluidisation heat, and sealing bonding is carried out to weld；
Sealing and spacer ring are installed, concretely comprised the following steps：All O-rings are changed, by side of the bonding second sealing using press-in
Formula is installed in place, and will be sealed and is compacted using nylon rod, whether measurement compression distance is met the requirements, and spacer ring is pressed into, measurement press-in
Whether depth meets the requirements；First bonding of sealing is installed in place by the way of press-in, will be sealed using nylon rod
Whether compacting, measurement compression distance meets the requirements；
The static pressurize of described sealing, is concretely comprised the following steps：Bonding rubber strip is pressed on main driving external seal pressure ring with running
Road centre simultaneously fastens external seal pressure ring；Any one external pressure gauge of HBW inlets in OH0-OH8, by grease pump to fan
Palace annular seal space persistently injects grease, and pressure closes ball valve, pressurize 10min, observation gage pressure change feelings when reaching 3.5bar
Condition, when pressure is declined no more than 0.2bar, sealing property is qualified；Keep under conditions of first of sealing 3.5bar pressure, pass through
The above method carries out pressurize test to the sealing of EP2 chambers；
Envelope dynamic test, is concretely comprised the following steps：By being added water into native storehouse, aerating, by native storehouse top pressure set up arrive 1bar or so,
Pressure is kept, then according to high and low rotating speed rotating cutter-head in actual tunneling process, whether observation gear oil pocket has leakage；
Described the 4th step cleaning gear oil pocket and test chamber simultaneously change driving box gear oil, concretely comprise the following steps：In dynamic test
While, gear oil pocket and test chamber are cleaned repeatedly using No. 46 hydraulic oil；Driving box is changed after the dynamic test passes of sealing
Gear oil；
The 5th described step subsequently tunnels the regulation of points for attention, is specially：Sealing is formulated the shield machine later stage and tunneled after changing
Monitor, detect and application maintenance points for attention in journey, including inspect periodically whether main driving external seal test chamber has leakage and drive
Dynamic case gear oil liquid level situation of change；Periodically to driving box gear oil sample examination, detection oil product is with the presence or absence of abnormal.
Positive beneficial effect：The invention discloses one kind main driving sealing is changed and detection process in without by master
Driving is hung to ground and carries out dismounting and change sealing and install, and is done directly in hole, and short implementation cycle, cost are low, simple
It is operable, shield owner driving seal failure under normal pressure need to be solved and change problem, construction speed is substantially increased and work is imitated
Rate, reduces enterprise construction cost, improves enterprise competitiveness, and shield machine be can yet be regarded as the processing of same category of device failure one
It is worth the solution used for reference.
Brief description of the drawings
Fig. 1 is replacing options flow chart of the invention；
Fig. 2 is that shield stop position ground is reinforced and precipitation schematic diagram；
Fig. 3 is that shield machine is calmed the anger ventilation schematic diagram；
Fig. 4 is cutter head of shield machine supporting, reinforces schematic diagram；
Schematic diagram is changed in driving sealing based on Fig. 5；
Fig. 6 is sealing plate weld schematic diagram；
The static pressurize conceptual scheme of driving sealing based on Fig. 7.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is described further：
Replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine, specifically include following steps under a kind of normal pressure：
A1, shield stop position beats glass fiber post from surface drilling and bored concrete pile is reinforced while digging dewatering well precipitation；
A2, shield machine driving arrives stop position；Preceding middle shield note polyurethane, tail shield rear bull's eye, five ring positions note dual slurry are carried out
Sealing；
A3, by conveying worm, sealed space requirement is changed by dregs output in native storehouse to meet；
A4, is calmed the anger and is vented into native storehouse by shield machine equipment of itself；
Gas in native storehouse is detected using gas detecting instrument before A5, warehouse entry；
A6, using plank to carrying out supporting at cutterhead opening, reinforcing, prevents the soil body from caving in；
Specifically, in above-mentioned steps A1-A6, A1 steps refer to Fig. 2, and A4 steps refer to Fig. 3, and A5 steps refer to figure
4；
As shown in the main driving sealing replacing schematic diagrames of Fig. 5, seal joint, sealing and spacer ring are removed, is concretely comprised the following steps：Use instrument
Remove external seal pressure ring, using self-made tooling take out first sealing, be screwed into spacer ring using M8 long bolts, using jack pull out every
Ring, takes out second using self-made tooling and seals；
As shown in the main driving sealing replacing schematic diagrames of Fig. 5, external seal runway abrasion detection raises runway, concretely comprised the following steps：Cleaning
Sealing fit-up gap between anterior shield center ring and external seal runway, is ground using dial gauge, Steel Ruler to being sealed on twice runway
Damage depth and height detected and calculates the distance of runway up-regulation, raised external seal runway using full silk hexagon socket head cap screw,
Sealing fit-up gap is measured using dial bore gage and checked；
As shown in the main driving sealing replacing schematic diagrames of Fig. 5, gear oil pocket and each grease holes dredging of test chamber are concretely comprised the following steps：Beat
Tooth punching wheel oil pocket OC1-8 whole plugs and oil pipe, carry out air-blowing, until in each hole to each hole successively using 1bar air
Face residual grease is all blown out, and test chamber grease holes are dredged using the above method；
As shown in Fig. 6 sealing plate weld schematic diagrames, due to O-shaped close between drive disk and external seal runway after the up-regulation of external seal runway
Strip of paper used for sealing can not be changed, there may be the risk of gear oil leakage after being adjusted in order to avoid runway, and native storehouse muddy water passes through
This sealing enters gear tank, and the gap between the external seal runway and cutterhead flange after adjustment is used to 6mm curved plate
Carry out closing welding；
Envelope bonding：Sealing bonding in scene is completed by sealing producer professional and technical personnel using special tooling, instrument, and bonding way is
Heat of vulcanization connects；
Such as the main driving sealing replacing schematic diagrames of Fig. 5, sealing and spacer ring are installed, concretely comprised the following steps：All O-rings are changed, will be bonded
Good second sealing is installed in place by the way of press-in, will be sealed and is compacted using nylon rod, whether measurement compression distance accords with
Close and require, spacer ring is pressed into, whether measurement compression distance meets the requirements；By first bonding of sealing by the way of press-in
It is installed in place, will be sealed and be compacted using nylon rod, whether measurement compression distance meets the requirements；
As driven based on Fig. 7 shown in the static pressurize conceptual scheme of sealing, static state pressurize is carried out to sealing, is concretely comprised the following steps：Will bonding
Good rubber strip is pressed in the middle of main driving external seal pressure ring and runway and fastens external seal pressure ring；It is any one in OH0-OH8
The individual external pressure gauge of HBW inlets, persistently injects grease, pressure is closed when reaching 3.5bar by grease pump to labyrinth seal chamber
Ball valve, pressurize 10min observes gage pressure situation of change, when pressure is declined no more than 0.2bar, sealing property is qualified；Protect
Hold under conditions of first of sealing 3.5bar pressure, pressurize test is carried out to the sealing of EP2 chambers by the above method；
Sealing dynamic test, is concretely comprised the following steps：By being added water into native storehouse, aerating, native storehouse top pressure is set up left to 1bar
The right side, keeps pressure, then according to high and low rotating speed rotating cutter-head in actual tunneling process, and whether observation gear oil pocket has leakage；
As shown in the main driving sealing replacing schematic diagrames of Fig. 5, clean gear oil pocket and test chamber and change driving box gear oil, specifically
Step is：While dynamically test, gear oil pocket and test chamber are cleaned repeatedly using No. 46 hydraulic oil；Sealing dynamic test
Driving box gear oil is changed after qualified；
Monitoring in shield machine later stage tunneling process, detection and application maintenance points for attention are formulated in sealing after changing, for example：Periodically inspection
Look into whether main driving external seal test chamber has leakage and driving box gear oil liquid level situation of change；Periodically driving box gear oil is taken
Sample is chemically examined, and detection oil product is with the presence or absence of abnormal.
Embodiment 1
Right line shield opens a position
First, industrial and mineral introduction：X stations~B stations are interval（XB is interval）Tunnel uses shield construction, and shield is interval to be originated from the X stations south,
Middle ventilating shaft is passed through, B stations are reached.Shield interval passes through X bridge piers base, the interval tunnel of No. 4 lines of subway along Wan Quan He Road successively southwards
Road, X hospitals southern side overline bridge, A townshiies plot office building-group, wear the safe shop structures of B1 A under vertically passing through after newly-built palace social connections,
A parks and its artificial lake are passed through eastwards in turning, and B stations are reached in C areas northwest side.
X~B intervals are interval for two-wire shield.Left line design mileage is BK19+694.200~BK21+323.007, right line
Design mileage is BK19+694.200~BK21+346.514.Left and right line is respectively set at long-chain one, i.e.,：Left line is in mileage K20+
One long-chain is set at 694.004, and long 74.004m, right line sets a long-chain, long 55.338m at mileage K20+675.338.It is left
Line scope of design total length 1702.811m, right line scope of design total length 1707.652m.Interval sets two service channels, wherein one
Service channel and pump house, interval ventilating shaft is set at the left BK20+922.394 of mileage.Interval circuit is in " V " type slope, and earthing is 18.9
Between~25.5m, circuit ruling grade 25 ‰, minimum planes sweep is 333.5m.
Stratum is in the range of the shield shutdown of X~B intervals：Silty clay plain fill 1. 1. 1 layer of layer, miscellaneous fill, silty clay
2. 1 layer, 2. 3 layers of Extra-fine sand, 2. 5 layers of cobble, silt 3. 3. 1 layer of layer, silty clay, silty clay 6. 6. 1 layer of layer, clay, powder
6. 2 layers of soil, 6. 3 layers of detail sand, cobble 7. layer, silty clay 8. 8. 1 layer of layer, clay, 8. 2 layers of silt, 8. 3 layers of Extra-fine sand, stop
Put shield machine and be predominantly located at cobble 7. layer and silty clay 6. layer in seat in the plane.
Shield stop position design plane curve is straight line.The vertical face gradient of shield stop position design is 25 ‰ descendings.
2nd, stop position
It is vacant lot according to the secondary driving stop position ground of the right line shield machine of current on-site actual situations, underground is without pipeline, finally
It is defined as the 93rd ring and completes assembled, cutter head of shield machine otch mileage is right BK19+ 812.301, in shutting down before and after scope shield machine
Cheng Wei：Preceding point：Right BK19+813.331;Point afterwards：Right BK19+803.912.Stop position, surface buildingses situation and stabilization zone
See stop position and reinforce position view.Special instruction：The actual stop position of shield is with the otch ring shown by shield machine
Journey is defined.
3rd, preparation before opening a position
1st, open a position preparation
（1）Native bulkhead, ball valve and gate valve on people's lock are checked, is dredged to blocking ball valve, it is ensured that can normally use；
（2）Check level of ground water situation；
（3）Ventilating system and shield machine foaming system, bentonite system are checked, it is ensured that can normally use；
（4）The operating personnel of warehouse entry are carried out repairing confiding a technological secret before main driving external seal, told somebody what one's real intentions are safely；
（5）Prepare the main driving external seal and its construction equipment changed；
（6）Be ready to open a position power tool, water power in hole, separate ventilation, gas detecting instrument, pressure blower fan tool, explosion-proof lamp in hole
Tool；
（7）The bill of materials is inspected for acceptance to the goods and materials used in the process of more change owner driving external seal, emergency materials.
2nd, shield dock is reinforced situation and judged
（1）When cutterhead, which enters, reinforces bored concrete pile, propulsive parameter is collected, record analysis is carried out.Break point consolidation effect is analyzed（Push away
Power, moment of torsion, speed）；
（2）Dregs sampling is carried out, observation dregs particle is analyzed and whether tapping temperature changes；
（3）Carry out appropriate under-voltage propulsion, the change of the unearthed amount of contrast, the change of surface subsidence；
（4）Cutterhead into break point bring down stocks when, observation soil pressure whether reduce always, whether there is unusual fluctuations；
（5）By the ball valve on the plate of people storehouse, soil layer is inserted using diameter 10mm reinforcing bar, face soil stabilization situation is judged；
（6）After the completion of bringing down stocks, shut down 2~3 hours, whether observation soil pressure changes.
（7）Opened successively from top to bottom by the ball valve on the plate of people storehouse, preliminary judgement opens a position a groundwater condition.
3rd, shield opens a position preceding section of jurisdiction slip casting closure
（1）Appropriate bentonite is injected to shield tail rear when shield is shut down, to prevent simultaneous grouting slurry adhesion shield drive end unit.
（2）When shield is shut down sealing seal ring slip casting is carried out in shield tail rear bull's eye, five ring positions（Dual slurry）, do 2 road rings
Hoop, and carry out seal ring slip casting in the ring position of shield tail rear two（Inject polyurethane）, prevent simultaneous grouting slurry from fleeing.
（3）1 road hoop is done, prevents aquaporin from entering to note polyurethane on the outside of shield body by shield body radial hole before shield shutdown
Enter face, cause to open a position.
4th, slag tap decompression
Cutter head of shield machine is reached after predetermined stop position, and stop operating cutterhead, opens conveying worm, and dregs in native storehouse is defeated
Go out, untill the soil body drops to conveying worm not out of dregs.Cutterhead face is checked by people's warehouse channel in shield body
Stability, slag tap and finish and meet after the sealed space requirement of replacing, stop slagging tap.
（1）Shield cutter reaches stop position, opens conveying worm, by dregs output about 1/3 in native storehouse（11m3）.Open
Open whether people storehouse gate observation cutterhead face is stablized and whether have appreciable current.
（2）Conveying worm is rotated further until dregs in native storehouse has been gone out, Structural Engineer observes knife in tapping process
Whether disk face is stable, whether have appreciable current, if there is the unstable situation of face shield driver should be notified to stop in time
It is unearthed, can continues to be unearthed after reinforcing and completing unstable place.
, ventilation of calming the anger
It is gas exhaust piping using shield machine people storehouse pressure-retaining system, exhaust outlet is arranged at No. 6 chassis.Utilize foaming system pipe
Road, by the foam hole on cutterhead, blows in Xiang Tucang, while opening former pressure-retaining system pipe valve, will extrude gas and drains into
Presumptive area.Gas is diluted by the fresh air being pressed into hole in native storehouse, and is discharged with air in hole outside hole.
, gas detection
The ball valve on the plate of people storehouse is faced using gas detecting instrument, ball valve is opened, gas in native storehouse is detected, gas detection is closed
It can be constructed, and be made a record as requested after lattice.Examination criteria is with reference to following table：
| Gaseous species | Allow maximum concentration | Standard is limited the quantity |
| Oxygen | 19.5%~23% | ≥20 |
| CH4 | No more than 1% | ＜ 0.75 |
| CO2 | 9000mg/m3 | ≤0.5 |
| CO | No more than 0.0024% | ≤30 |
| Nitrogen oxides | 5mg/m3 | ≤5 |
| SO2 | 5mg/m3 | ≤0.0005 |
| H2S | 10mg/m3 | ≤0.00066 |
| NH3 | 30mg/m3 | ≤0.064 |
4th, shield opens a position operation
1st, door is opened
When opening door, 2~3 teeth of the whole screws of door are first unclamped, observation whether there is muddy water and penetrates into people's lock, ne-leakage from crack between a door and its frame
Muddy water can open door.
If there is water infiltration, following measures can be taken；
（1）By being less than the ball valve of door on native bulkhead, water is exported outside shield body, then tunnel is extracted out by water pump；
（2）Crack between a door and its frame infiltration situation is observed, judges whether liquid level declines；
（3）If liquid level declines, wait and drop to below door, open door, use pumping for water pump；If liquid level does not decline, illustrate area
Face water content is big（Stability is poor when sand-pebble layer water content is big）, stability is poor, the precipitation that ground is set during shield opens a position
Well will carry out dewatering operation always, must not interrupt.
, open a position operation when storehouse in divulge information
（1）Gentle physical examination of being divulged information in native storehouse is surveyed
After door is opened, gas testing staff carries gas detecting instrument and explosion-proof electric torch, and air near door is detected,
And tentatively judge strata condition, confirm after safety, the Tu Cang that is allowed for access carries out next step detection.Complete detection finishes and judges ground
Layer is stable, and air quality is qualified, and is checked through each teams and groups team leader after confirmation judges safety, workmen can warehouse entry lay safe
Storehouse inner cover plate at light fixture and opening ventilating opening, introduces airduct and is aerated, start air circulation, while stopping the pressure of foaming system
Wind, in cutter processing procedure, it is necessary to assure the continuity of ventilation.
（2）Trial inspection after opening a position in native storehouse
After door air confirmation nearby is qualified, trial inspection is carried out to the cutterhead opening soil body by Structural Engineer, soil is checked
Whether body is soft, whether there is a large amount of infiltration situations；If the soil body is soft or there is a small amount of rises, soil stabilization should be first carried out in progress
Tool changing operation.
, Tu Cang illumination
Tu Cang illuminations use 36 volts of safe voltage as mains lighting supply.
, the cutterhead opening soil body reinforcing
All preparations are ready, after detection gas is qualified, open the soil body and water level inside door, the native storehouse of observation, reach requirement
Warehouse entry operation afterwards.Because consideration changing main-spindle is held, the Sealing period cycle is longer, and the progress supporting at cutterhead opening, profit uses the lumps of wood
The cutterhead back soil body is supported with plank sheathing, and plank is fixed with bar connecting cutterhead spoke, prevents the soil body caves in from causing life
Injury, the strip that plank sheathing is processed into special shape is sent into by people's Hatch Opening.
Embodiment 2 is changed in main driving external seal hole
First, program profile
Detected at present according to middle iron 212 and continuous observation situation（Test chamber finds there is HBW, EP2 and a small amount of silt, gear oil
Liquid level does not decline）, preliminary to infer that preceding three seals have failed, the sealing of the 4th road is intact.Total scheme is：Twice before removing
Sealing（Due to the limitation of bulk, it is only capable of changing preceding two seals in hole in the case where not tearing cutterhead open）, detection sealing race
Road abrasion condition, 8mm is moved up by runway, cleaning gear oil pocket, test chamber and driving box, adhering and sealing, install sealing and spacer ring,
Pressure ring, welded seal plate, carries out external seal static load and dynamic is tested.
2nd, put gear oil and clear up driving box
Gear oil inside clean driving box is put by driving box bottom fuel outlet, driving box bottom observation cover plate is opened, uses
Cleaning wiping cloth cleans out driving box bottoms.
3rd, sealing and spacer ring are removed, pressure ring and is cleaned
1st, external seal junk ring bolt is taken apart using 17mm inner hexagon spanners（32 altogether）, external seal pressure ring is removed, cleaning is outer close
Pressure ring is sealed, grease chamber filling situation is checked；
2nd, first of external seal is taken out using self-made tooling；It is marked in frock with place in sealing contact.
3rd, it is screwed into spacer ring using M8 long bolts（Minimum 4 balances are pulled out, length end face length 61mm when noting pulling out）, take
Go out spacer ring, clean spacer ring；
4th, second external seal is taken out using self-made tooling；It is marked in frock with place in sealing contact.
5th, two seals lip degree of impairment is checked；
6th, the grease of HBW and EP2 inside cavities is collected and Inspection and analysis in demolishing process.
4th, external seal runway abrasion detection, raises runway
1st, the sealing fit-up gap between anterior shield center ring and external seal runway is cleaned using cloth waste and hydraulic oil；
2nd, sealing wear depth on twice runway and height are detected using dial gauge, Steel Ruler after cleaning up, checked
Whether external seal runway up-regulation 8mm meets requirement；
Required if the 3, meeting, use special jackscrew（Hexagon socket head cap screw M16 × 83-10.9）External seal runway is moved up into 8mm, simultaneously
External seal runway bolt is fastened using pneumatic impact wrench, carrying out closure to bolt using glass cement fills and leads up；
4th, height and position is assembled according to two seals（First of 36mm, second 121mm), using dial gauge to sealing assembly building
Gap, which is measured, to be checked（Theoretical value 32mm).
5th, cleaning gear oil pocket and test chamber
It can not be removed because three seals are limited by space, it is therefore desirable to gear oil pocket and test chamber are rinsed, specifically
Step is as follows：
1st, test chamber is rinsed：The gear oil pump carried using shield machine, is rinsed using 220 gear oils.Gear oil pump is entered
Mouthful disconnect and connect during flexible pipe is introduced into barreled gear oil from magnetic filter exit, using in gear oil motor export distributor arbitrarily
Access gear oil pocket OB1 holes, disconnect OB4 holes and access in a container all the way, under debugging mode, open gear oil pump, circulating flushing
Wash, untill oil is released totally.
2nd, gear oil pocket is rinsed：The gear oil pump carried using shield machine, is rinsed using 220 gear oils.By gear
Oil pump import disconnects from magnetic filter exit to be connect during flexible pipe is introduced into barreled gear oil, uses gear oil motor export distributor
In any access gear oil pocket OC8 holes all the way, disconnect OC4 holes and access in a container, under debugging mode, open gear oil pump,
Circulation flushing, untill oil is released totally；
6th, HBW and EP2 grease channels are dredged
1st, HBW grease channels are dredged：HBW greases are persistently injected, after 8, pressure ring surface decanting point has grease spilling, pause
Injection, cleaning pressure ring surface.Oil addition is then carried out again, continues 10 minutes, spilling grease is all scraped using Steel Ruler
Go out, be put into container and calculate grease volume, be compared with injection rate theoretical volume, if both are close, illustrate HBW grease channels
Whole is unimpeded and flow is normal.
2nd, EP2 grease channels are dredged：EP2 greases are persistently injected, after 8, pressure ring surface decanting point has grease spilling,
Pause injection, cleaning pressure ring surface.Oil addition is then carried out again, continues 10 minutes, it is using Steel Ruler that spilling grease is complete
Portion is scraped, and is put into container and is calculated grease volume, is compared with injection rate theoretical volume, if both are close, illustrates EP2 greases
Passage is all unimpeded and flow is normal.
7th, sealing plate weld, closure
1st, get the raw materials ready
According to getting the raw materials ready, figure carries out blanking, using linear cutter mode；The welding groove at single part two ends is processed, each
M12 screwed holes are opened up in the middle of ring；
2nd, sealing ring spells point
Sealing ring is carried out by figure and spells point, it is desirable to which distance of each sealing ring away from external seal runway end face is 6mm.Now cutterhead and anterior shield
State is stood up in tunneling direction, it is necessary to which sealing ring is firm with turning round the blue spot welding of leg position.
, welding
Welding preparation：The impurity such as the iron rust, greasy dirt, moisture of position must be removed.Welding rod：J507 low hydrogen sodium basic electrodes,
φ 3.2mm, welding rod must be through 300 ~ 350 DEG C of baking 1h, with drying with must use short arc operation during welding before weldering.Welding parameter：Electric current
90~110A。
It need to ensure ventilation when being welded in hole, Tu Cang is inflated using shield machine foamed pipe, the exhaust of people storehouse pressure maintaining pipe,
Airway path is formed, and sends special messenger to the uninterrupted detection of gas concentration, once find that gas concentration is not suitable for welding, people in native storehouse
Member withdraws, ventilation treatment, after gas detection is qualified, welds again.
Welding：It is symmetrically welded using two welding machines（Welding sequence is：1-5、2-6、3-7、4-8）.Points for attention：Welding
Bonding should bonding nearby, i.e., in the weld seam of welded seal ring and cutterhead flange, bonding should ride on cutterhead flange and with weldering
Sew up near；In the weld seam of welded seal ring and external seal runway, bonding should ride on external seal runway and close with weld seam.
In welding process, the temperature outside duty measurement welding gun, at the upper 100mm of torsion leg position orchid（The selection of this temperature measuring point be through
The result of welding test is crossed, heat conduction is most fast herein）.When temperature is more than 110 DEG C, changes the sealing ring welding of another side or stop
Work, treats that temperature drops to normal temperature herein and is further continued for welding.
Complete after welding of the sealing ring with turning round leg position orchid and external seal runway, the joint welding between 8 sealing rings of welding,
Weld bead height is concordant to sealing ring surface.
After the completion of welding, by 8 M12 screwed holes on sealing ring to intracavitary implantation glass glue, until overflowing, glass cement
After filling is finished, using M12 bolt plugging holes, then nut and sealing ring are welded；；
4th, detect and repair
PT dye penetrant inspections are carried out to the weld seam of this welding, if it find that there is crackle on surface, angle grinding head grinding wheel polishing need to be used to lack
Position is fallen into, repair welding is carried out, PT flaw detections are carried out again, until meeting the requirements.
8th, sealedly selection is Nian Jie with hole
1st, encapsulant：Nitrile rubber.Reliability：Be widely used in the main drive system of shield, with hole use bonding side
Formula changes the successful case of external seal；
2nd, sealing bonding：Sealing is bonded in hole and carried out, and is completed by sealing manufacturer professional.
, sealing ring spell point
Sealing ring is carried out by figure and spells point, it is desirable to which distance of each sealing ring away from external seal runway end face is 6mm.Now cutterhead and anterior shield
State is stood up in tunneling direction, it is necessary to which sealing ring is firm with turning round the blue spot welding of leg position.
The 9th, sealing, spacer ring, external seal pressure ring are installed
1st, all O-rings are changed（Spacer ring is D8, L=10500；It is D5 on pressure ring, L=11400 are sticked into using happy safe 406 instant drying adhesive
Circle）；
2nd, the bonding second in scene is sealed（A small amount of butter is smeared during installation to be easily installed）Installed by the way of press-in
In place, it will be sealed and be compacted using nylon rod, whether measurement compression distance is 121mm（Theoretical value）；
3rd, the spacer ring cleaned up is pressed into（A small amount of butter is smeared during installation）, whether measurement compression distance is 61mm（It is theoretical
Value）；
4th, by first bonding of sealing of scene（A small amount of butter is smeared during installation to be easily installed）Installed by the way of press-in
In place, it will be sealed and be compacted using nylon rod, whether measurement compression distance is 36mm（Theoretical value）；
5th, flat sealant is smeared on pressing plate（Happy Thailand 586）, external seal pressure ring, fastening bolt are installed（Note applying on bolt
Smear screw thread fastening glue）, smear glass cement closure.
Tenth, rinse driving box and fill new gear oil
1st, add at the top of 220 gear oils cleaning driving box, cleared up by bottom porthole from the oily inlet of driving box top gear
Bottoms, Inspection and analysis residue；
2nd, 320 new gear oils are rejoined, liquid level, which is met, to be required, recovers pipeline.
11, external seal static load and dynamic test
1st, static pressurize：Using rubber strip pressurize, bonding rubber strip is pressed on outside main driving when external seal pressure ring is installed
In the middle of seal joint and runway, pressurize experiment is carried out to labyrinth seal chamber and EP2 chambers；
2nd, pulsing packing
After static pressurize terminates, remove pressurize smearing HBW and must must be applied by hand with before filling pressure ring again after sealing ring
Smear uniform closely knit, then fill seal joint, this when first should not the water filling into native storehouse, first grease adding, observation grease all squeezes
After going out, 1 walks around the pressurization that added water again into native storehouse after fast 1 hour of rotating cutter-head.
Pulsing packing test point two parts a, part is Tu Cang decompression static tests；A part is to maintain under static state, to soil
Tested under storehouse gas injection, rotating cutter-head, concrete scheme is as follows：
2.1 static test：Pressurizeed by pressure-retaining system to Tu Cang, Tu Cang is set up pressure, pressure is not above 4bar, and observation is outer
Whether there is grease to overflow in sealing detection chamber observation tube or have obvious air-flow.
2.2 dynamic tests：Native storehouse 2.1 static test state is kept, water is injected to Tu Cang, water level is higher than at the top of main driving,
Support pressure 4bar is set up by pressure-retaining system, developer is added into water, the darkening of water is allowed, rotating cutter-head to highest turns
Whether there is grease spilling in speed, rotating cutter-head 5min, observation external seal test chamber observation tube, while observing driving box gear fluid
Whether position has increase, and gear oil liquid level is marked in advance before testing.
The invention discloses one kind to it is main driving sealing changed and detection process in without by it is main driving be hung to ground
Carry out dismounting and change sealing and install, be done directly in hole, and short implementation cycle, cost are low, simple operable, need to solve
Problem is changed in shield owner driving seal failure under normal pressure, is substantially increased construction speed and operating efficiency, is reduced enterprise
Construction cost, improves enterprise competitiveness, the solution for being worth using for reference that shield machine be can yet be regarded as the processing of same category of device failure one
Certainly scheme.
The present invention is described in detail above example, and those skilled in the art can be right according to the above description
The present invention makes change case.Therefore, some of embodiment details should not constitute limitation of the invention, and the present invention will be with appended
The scope that claims are defined is as protection domain.
Claims (10)
1. replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure, it is characterised in that including following
Process：The first step：Preparation before opening a position；Normal pressure changes sealing in second step, the hole that opens a position；3rd step：Sealing property is surveyed
It is fixed；4th step：Cleaning gear oil pocket and test chamber simultaneously change driving box gear oil；5th step：The rule of follow-up driving points for attention
It is fixed.
2. replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure according to claim 1,
It is characterized in that：Preparation before the described first step opens a position, including：Shield stop position beats glass fiber post from surface drilling
And bored concrete pile is reinforced and digs dewatering well precipitation simultaneously；Shield machine driving arrives stop position；Preceding middle shield note polyurethane, tail shield rear ten
Ring, five ring positions note dual slurry carry out sealing；By conveying worm, dregs output in native storehouse is changed sealedly empty to meet
Between require；Calm the anger and be vented into native storehouse by shield machine equipment of itself；Using gas detecting instrument to gas in native storehouse before warehouse entry
Detected；Using plank to carrying out supporting at cutterhead opening, reinforcing, prevent the soil body from caving in.
3. replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure according to claim 1,
It is characterized in that：The described second step normal pressure in hole that opens a position changes sealing, including：Two seals before removing；Detect sealed track
Abrasion condition；Runway is raised；Dredge gear oil pocket, test chamber, each grease channel of HBW, EP2；Welded seal plate；Bonding is close
Envelope；Sealing and spacer ring are installed.
4. replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure according to claim 1,
It is characterized in that：The 3rd described step sealing property is determined, including the static bucktooth of sealing and sealing dynamic pressure measurement：To what is changed
Sealing carries out pressurize test and dynamic test under static state to verify to seal to change whether succeed.
5. replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure according to claim 1,
It is characterized in that：Described the 4th step cleaning gear oil pocket and test chamber simultaneously change driving box gear oil, including the use of No. 46 liquid
Force feed is cleaned repeatedly to gear oil pocket and test chamber；Driving box gear oil is changed after the dynamic test passes of sealing.
6. replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure according to claim 1,
It is characterized in that：The 5th described step, which is subsequently tunneled, formulates the pick of shield machine later stage after the regulation of points for attention, including sealing replacing
Monitor, detect and application maintenance points for attention and maintenance operational procedure during entering.
7. replacing side in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure according to claim 1 or 3
Method, it is characterised in that：The described second step normal pressure in hole that opens a position changes sealing, possess including：External seal pressure is removed using instrument
Ring, is taken out first of sealing using frock, spacer ring is screwed into using M8 long bolts, pulled out spacer ring using jack, taken out using frock
Second is sealed；
External seal runway abrasion detection, raises runway, concretely comprises the following steps：Clean close between anterior shield center ring and external seal runway
Fit-up gap is sealed, sealing wear depth on twice runway and height are detected using dial gauge, Steel Ruler and runway is calculated
The distance of up-regulation, is raised external seal runway using full silk hexagon socket head cap screw, and sealing fit-up gap is entered using dial bore gage
Row measurement is checked；
Gear oil pocket and each grease holes dredging of test chamber, are concretely comprised the following steps：The whole plugs of gear oil pocket OC1-8 and oil pipe are opened,
Air-blowing is carried out to each hole successively using 1bar air, until residual grease is all blown out inside each hole, above-mentioned side is used
Method is dredged to test chamber grease holes；
Welded seal plate：Because the O-shaped sealing strip between drive disk and external seal runway can not be carried out more after the up-regulation of external seal runway
Change, the gap between the external seal runway and cutterhead flange after adjustment is subjected to closing welding using 6mm curved plate；Using
Fluidisation heat connects mode and carries out sealing bonding to weld；
Sealing and spacer ring are installed, concretely comprised the following steps：All O-rings are changed, by side of the bonding second sealing using press-in
Formula is installed in place, and will be sealed and is compacted using nylon rod, whether measurement compression distance is met the requirements, and spacer ring is pressed into, measurement press-in
Whether depth meets the requirements；First bonding of sealing is installed in place by the way of press-in, will be sealed using nylon rod
Whether compacting, measurement compression distance meets the requirements.
8. replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure according to claim 4,
It is characterized in that：The static pressurize of described sealing, is concretely comprised the following steps：Bonding rubber strip is pressed on main driving external seal pressure
Ring and runway centre simultaneously fasten external seal pressure ring；Any one external pressure gauge of HBW inlets, passes through grease in OH0-OH8
Pump persistently injects grease to labyrinth seal chamber, and pressure closes ball valve when reaching 3.5bar, pressurize 10min observes gage pressure
Situation of change, when pressure is declined no more than 0.2bar, sealing property is qualified；Keep the condition of first of sealing 3.5bar pressure
Under, pressurize test is carried out to the sealing of EP2 chambers by the above method；
Envelope dynamic test, is concretely comprised the following steps：By being added water into native storehouse, aerating, by native storehouse top pressure set up arrive 1bar or so,
Pressure is kept, then according to high and low rotating speed rotating cutter-head in actual tunneling process, whether observation gear oil pocket has leakage.
9. in the main driving seal failure hole of balancing earth-pressure shielding machine replacing side under a kind of normal pressure according to claim 1 or 5
Method, it is characterised in that：Described the 4th step cleaning gear oil pocket and test chamber simultaneously change driving box gear oil, concretely comprise the following steps：
While dynamically test, gear oil pocket and test chamber are cleaned repeatedly using No. 46 hydraulic oil；After the dynamic test passes of sealing
Change driving box gear oil.
10. replacing side in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure according to claim 1 or 6
Method, it is characterised in that：The 5th described step subsequently tunnels the regulation of points for attention, is specially：Sealing formulates shield machine after changing
Monitor, detect and application maintenance points for attention in later stage tunneling process, including whether inspect periodically main driving external seal test chamber
There are leakage and driving box gear oil liquid level situation of change；Periodically to driving box gear oil sample examination, detection oil product whether there is
It is abnormal.
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| CN201710345354.3A CN107091096A (en) | 2017-05-17 | 2017-05-17 | Replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710345354.3A CN107091096A (en) | 2017-05-17 | 2017-05-17 | Replacing options in the main driving seal failure hole of balancing earth-pressure shielding machine under a kind of normal pressure |
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| CN108005667A (en) * | 2017-12-11 | 2018-05-08 | 中铁十八局集团有限公司 | Sealing replacing options are originated in a kind of jacking construction |
| CN108469391A (en) * | 2018-03-26 | 2018-08-31 | 中铁工程装备集团有限公司 | A kind of replaceable cutterhead large circle tunneling boring wear detector of normal pressure |
| CN108868793A (en) * | 2018-09-17 | 2018-11-23 | 中国铁建重工集团有限公司 | A kind of shield owner driving high pressure sealing system and a kind of slurry balance shield machine |
| CN110792445A (en) * | 2019-12-02 | 2020-02-14 | 沈阳众磊道桥有限公司 | Magnetorheological elastomer active control water sealing and water stopping shield tail brush |
| CN111485895A (en) * | 2020-03-12 | 2020-08-04 | 山东大学 | Grease parameter real-time detection system and application thereof in shield tail seal monitoring |
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| CN111947857A (en) * | 2020-09-03 | 2020-11-17 | 中船重型装备有限公司 | Shield machine main drive sealing air tightness detection method |
| CN112395571A (en) * | 2020-11-12 | 2021-02-23 | 深圳大学 | Earth pressure balance shield machine and control method |
| CN113565518A (en) * | 2021-07-26 | 2021-10-29 | 中国水利水电第十四工程局有限公司 | Shield active hinge seal replacement method |
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