CN1982650A - Composite balancing earth-pressure shielding machine - Google Patents
Composite balancing earth-pressure shielding machine Download PDFInfo
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- CN1982650A CN1982650A CN 200510130590 CN200510130590A CN1982650A CN 1982650 A CN1982650 A CN 1982650A CN 200510130590 CN200510130590 CN 200510130590 CN 200510130590 A CN200510130590 A CN 200510130590A CN 1982650 A CN1982650 A CN 1982650A
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- 239000002131 composite material Substances 0.000 title claims abstract description 8
- 239000002689 soil Substances 0.000 claims abstract description 51
- 238000007789 sealing Methods 0.000 claims description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 229920000768 polyamine Polymers 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 239000004576 sand Substances 0.000 abstract description 7
- 239000004575 stone Substances 0.000 abstract description 6
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000005641 tunneling Effects 0.000 abstract description 3
- 235000013601 eggs Nutrition 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000004519 grease Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910000639 Spring steel Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 102000002322 Egg Proteins Human genes 0.000 description 3
- 108010000912 Egg Proteins Proteins 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 210000004681 ovum Anatomy 0.000 description 3
- 238000012384 transportation and delivery Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005183 dynamical system Methods 0.000 description 1
- KQTVWCSONPJJPE-UHFFFAOYSA-N etridiazole Chemical compound CCOC1=NC(C(Cl)(Cl)Cl)=NS1 KQTVWCSONPJJPE-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A composite soil pressure balance shield machine, comprising : shell (1), cutter head (2), soil storer (3), spiral conveyer (4) and impelling oil cylinder (6),it is characterized in that the said cutter head is set front of the shell, equipped with tearing knife (21) and the cutting knife (22), and the cutter point of the said cutting knife is a little back of the tearing knife; the soil storer is located rear the cutter head, and its wall surface is installed with injecting holes (32), the rear end is installed with pressure balancing equipment (5), and a soil outlet (31)is set under the soil storer; the inlet under the spiral conveyer connects the soil outlet of the container; the said impelling oil cylinder are uniformly installed along the shell inner wall. The shield machine solves the normal tunneling problem on sand or gravel eggs (gravel) layer of high water permeability, or the normal tunneling problem when it need to pass through more than 30 centimeters large stones and other obstructions.
Description
Technical field
The present invention relates to a kind of composite balancing earth-pressure shielding machine, more particularly, is a kind of composite balancing earth-pressure shielding machine that is applicable to high infiltration soil layer.
Background technology
For along the river, the power plant that builds of seashore, the recirculated water water intaking is unusual important engineering, used the method for open channel water intaking in the past basically, but difficulty of construction is very big, especially fetches water for the shoal.Afterwards, along with the raising of construction technology, introduced construction technologies such as immersed tube, push pipe, but still had a lot of drawbacks, especially large diameter water intaking tunnel.
Along with introducing shield construction, construction technology before having replaced gradually, but Ninghai power plant engineering recirculated water water intaking tunnel geology complexity, soil layer is more, and the moisture content height, 3# gravelly sand soil layer coefficient of permeability K v reaches 3.0 * 10-2cm/s, and v is especially up to 3.0 * 10-1cm/s for 6# ovum (gravel) stone soil layer coefficient of permeability K, for construction shield structure under the so high geological condition of water content, domestic still the first.
When adopting the shield driving mode to construct, generally will consider geological condition, the external diameter of shield structure, the length in tunnel, engineering construction program, labour's situation etc. are carried out type selecting to shield machine.Select the shield machine type according to geological conditions,, should use the shield-tunneling construction of closed type as far as possible, if underground water then should be paid the utmost attention to the slurry balance shield machine than enriching and water permeability sand soil preferably the stratum that chiltern great soil group independence can differ from; To cohesive soil, then can at first consider balancing earth-pressure shielding machine.But at transmission coefficient greater than 10
-2The ovum of cm/s, layer of gravel or when running into big obstruction slurry balance shield machine and balancing earth-pressure shielding machine all not too suitable.
Summary of the invention
The objective of the invention is to: a kind of balancing earth-pressure shielding machine of combined type is provided, to solve in permeable gravelly sand soil layer of height or the normal driving problem in ovum (gravel) the stone soil layer, the normal driving problem when maybe needing to pass obstruction such as ratchel more than 30 centimetres.
Composite balancing earth-pressure shielding machine provided by the present invention comprises: casing, cutterhead, Tu Cang, conveying worm and propelling oil cylinder, wherein, described cutterhead is positioned at the casing front portion, be provided with simultaneously on the cutterhead and tear cutter and bite, and the knife edge of described bite is slightly by tearing after the cutter; Described native position in storehouse is in the rear portion of cutterhead, and the rear surface of Tu Cang is provided with injected hole, and the Tu Cang rear portion is equipped with air pressure balance equipment, and the Tu Cang bottom is provided with soil outlet; The bottom inlet of conveying worm joins with the soil outlet of Tu Cang; Described propelling oil cylinder is along the casing inner wall setting.
In shield machine of the present invention, the bottom of described Tu Cang is a soil outlet, and the bottom of conveying worm is arranged in soil outlet.Described conveying worm is provided with the twice gate, and first road is a hydraulically operated gate, and second road is a hand door.
In shield machine of the present invention, described air pressure balance equipment is communicated with air inlet port and gas outlet on the panel of native storehouse.The panel of Tu Cang is provided with People's Bank of China's lock and enters the processing of excavation face for operating personnel.
In the present invention, described earth pressure balance is adjusted propelling pressure and soil layer pressure and groundwater pressure exactly and is contended with, and by adjusting top power, unearthed speed, soil pressure and groundwater pressure in the native storehouse is balanced each other, guarantee that the front soil body does not cave in, thereby shield machine is normally tunneled.
In shield machine of the present invention, the propelling oil cylinder is set evenly around the described casing inner wall.The quantity of set propelling oil cylinder can be determined according to the general knowledge of this area and the specification requirement of shield machine as calculated by those of ordinary skills, for example, the 10-50 platform can be set advance oil cylinder, preferred 12-40 platform, further preferred 15-35 platform.The propelling oil cylinder that is positioned at casing top preferably adopts long stroke to advance oil cylinder, and for example, its stroke can be 2000mm; And the propelling oil cylinder that is positioned at the casing bottom preferably adopts short stroke to advance oil cylinder, and for example, its stroke can be 1200mm.Preferred described long stroke advances the platform number of oil cylinder to account for to advance the about about 25% of the total platform number of oil cylinder, and described short stroke advances the platform number of oil cylinder to account for to advance about about 75% of the total platform number of oil cylinder.
In shield machine of the present invention, the shield tail of shield machine is provided with three road steel wire shield tails sealing brush, and wherein, last one steel wire shield tail sealing brush preferably can be removed replacing.Between three road steel wire shield tail sealing brushes, be filled with shield tail oil fat, to play sealing function.Described shield tail oil fat can be selected any this area seal grease commonly used for use.
After materials such as the shield tail employing polyamine fat of shield machine of the present invention carry out the sealing sealing, also last one shield tail steel wire sealing brush can be replaced to Y type rubber seal brush, to play the effect of sealing.
Compared with prior art, shield machine provided by the present invention has following beneficial effect:
1, shield machine has increased in the design of cutterhead and has torn cutter.When running into hard formation, with tearing the broken shiver stone of cutter, so just can protect bite not to be damaged, thereby make bite in other soil layers, bring into play effective function earlier.
2, arrange several injected holes before shield machine, making shield machine is 10 passing through boulder bed and transmission coefficient
-1During the soil layer of cm/s, be injected in the soil layer of front with dense mud or cement paste.Do the stream plasticity energy that improves land pebble in the soil layer on the one hand like this, make it to discharge from conveying worm effectively, make shield machine when passing through this soil layer, make the development end soil body keep stable on the other hand.
3, the twice gate is set on the conveying worm, if break down when shield machine one gate when passing through the high soil layer of moisture content, but standby gate trouble free service.
4, air pressure balance equipment has been installed simultaneously on this balancing earth-pressure shielding machine, during bulk stone that can not be broken in running into the stratum, can be by artificial treatment.
5, when designing, adopted on the shield tail three road steel wires sealing brush, and can change together in the inner part.When under the above head high difference pressure of 20m when driving wire brush sealing is unfavorable as the shield tail, at this moment, can adopt material such as polyamine fat to carry out the sealing sealing at the shield tail after, the 3rd road shield tail wire brush changes the rubber seal of Y type into and brushes and reach stagnant water effect.
Description of drawings
Fig. 1 is the sectional drawing of shield machine of the present invention.
Fig. 2 is a shield machine front elevation drawing of the present invention.
Fig. 3 is a shield machine rear elevation of the present invention.
Fig. 4 is the structural representation of shield tail Y type rubber seal brush of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing shield machine provided by the present invention is given further instruction, but therefore the present invention is not subjected to any restriction.
As shown in Figure 1, 2, composite balancing earth-pressure shielding machine of the present invention comprises casing 1, and the front end of casing 1 is a cutterhead 2; Be provided with simultaneously on cutterhead 2 and tear cutter 21 and bite 22, wherein the knife edge of bite 22 is slightly by tearing after the cutter 21.Tear cutter 21 and be primarily aimed at not rachill,, roll, come broken than lump stone by extruding and self as weathering tuff not.Run into the weak soil layer, it is ineffective to tear cutter 21, and rely on bite 22 this moment, under the rotation of cutterhead 2, and the cutting weak soil.Actual shield driving process is to finish under the acting in conjunction of these two kinds of cuttves.
Referring to Fig. 1 and Fig. 3, cutterhead 2 rear portions are native storehouse 3, and 3 bottoms, native storehouse are provided with soil outlet 31, and the soil that cutterhead 2 cuts enters in the native storehouse 3.The bottom of conveying worm 4 and soil outlet 31 join, and are used for the soil in the native storehouse 3 is transported to belt conveyer 7, are transported to then on the waste truck (not shown).The rear surface in native storehouse 3 is provided with a plurality of injected holes 32, is used for injecting dense mud or the cement paste soil layer to the front.
When shield machine entered pan soil, because of the soil layer independence is good, native storehouse 3 did not have the pressure existence to reduce the moment of torsion of cutterhead 2.Be to be unearthed smoothly this moment, can suitably add a certain amount of sticky soil in native storehouse 3 by injected hole 32, makes hard rock soil easily serve belt conveyer 7 by conveying worm 4 and be unearthed.And when shield machine entered weak soil, when comprising layer of sand soil, shield structure Tu Cang need have certain pressure, can artificially set, and comes balance front soil body earth pressue at rest to reach earth pressure balance, and the weak soil layer is unearthed to helical conveyor 4 under certain pressure in the native storehouse at this moment.For prevent that full section layer of sand from erupting to conveying worm 4 and soil outlet 31 under certain pressure, also need pressure injection certain amount of clay in native storehouse 3, keep native storehouse clay to reach more than 10%, produce the soil plug, prevent the eruption accident.
Referring to Fig. 1, the twice gate is set on the conveying worm 4, wherein last road gate is a hydraulically operated gate 41, one gate in back is hand door 42.If one gate breaks down when shield machine passes through the high soil layer of moisture content, but standby gate trouble free service.
Referring to Fig. 3,3 rear portions, native storehouse are equipped with air pressure balance equipment 5, and this air pressure balance equipment 5 is communicated with air inlet port 51 and gas outlet 52 on the native storehouse panel 63.Cooperate on-the-spot air compressor machine in the construction, give Tu Cang certain pressure.Actual conditions according to driving are regulated air pressure, if air pressure is too low, do not have the effect of equilibrium water pressure; Air pressure is too high, then might puncture covering layer.
In a concrete embodiment, in order to reduce the moment of torsion of cutterhead 2, prevent positive landslide and conveying worm sandblast, the atmospheric pressure native storehouse in generally be controlled at about 0.3Mpa (according to groundwater table and native storehouse internal gas pressure lose different and different).Before driving, ventilation earlier was good in about 30 minutes to 1 hour, water is forced beyond the soil body of front, and then jacking.During driving, should add air pressure earlier, be unearthed in the back.In addition, be also noted that the soil in the conveying worm 4 can not clearancen, otherwise gas can spill from conveying worm, the atmospheric pressure in the native storehouse is just inoperative.
The panel 63 in native storehouse 3 is provided with People's Bank of China's lock (not shown), and when the excavation face had unknown obstruction (as basis, stake etc.) or fortuitous event occurs, operating personnel can enter the excavation face and handle.
As shown in Figure 1, around shield machine housing 1, evenly arrange to advance oil cylinder 6, and the support boots 61 of oil cylinder external part head installation, propulsive force can be delivered on the section of jurisdiction 62 equably, guarantee that the shield machine balance advances.According to a specific embodiment of the present invention, arranged altogether that along shield machine inwall circumference 26 advance oil cylinder 6, every advances the thrust of oil cylinder 6 is 1200kN, and shield structure gross thrust is 31200kN, and this is the power of shield structure forward impelling.For adapting to last piece complete vertically needs of plug-in type section of jurisdiction of piece that bind, advance oil cylinder 6 that two kinds of strokes are arranged, top 7 director's strokes advance oil cylinder 6, and its stroke is 2000mm, and 19 of bottoms are short stroke propelling oil cylinder 6, and its stroke is 1150mm.
The shield tail is provided with three road steel wire shield tail sealing brushes 8, wherein can remove replacing together at last.Between three road wire brushes, be filled with shield tail oil fat, so that reach the purpose of shutoff mud.In the shield machine progradation, utilize shield tail grease pump (not shown) can constantly replenish shield tail oil fat, thereby guarantee the reliability of shield tail sealing.
In another specific embodiment, when tunneling under the above head high difference pressure of 20m, sealing is unfavorable to wire brush as the shield tail.At this moment, can adopt material such as polyamine fat to carry out the sealing sealing at the shield tail after, change the 3rd road (together last) shield tail steel wire sealing brush the rubber seal of into Y type and brush and reach stagnant water effect.
Shown in Figure 4 is the sectional drawing of shield tail Y type seal ring of the present invention.In the figure, 71 is that ring flat-plate, 72 is that seal plate fixed block, 73 is that alignment pin, 74 is that spring steel plate, 75 is that Y type joint ring, 76 is that afterbody pressing plate, 77 is the high pressure filler.Wherein, seal plate fixed block 72 and spring steel plate 74 are arranged side by side when mounted; Spring steel plate 74 and Y type joint ring 75 are that bonding is fixing.Y type seal ring is installed in the afterbody of shield machine, is clipped between section of jurisdiction and the housing, " Y " shape is pressed into " one " font, guarantee the compactness of its sealing, reach the purpose of sealing by the elasticity of spring steel plate 74.
Polyamine fat is a kind of macromolecular material, but instantaneous expansion behind the chance water, thus play the effect that the shield tail seals.Therefore, those of ordinary skills also can adopt other the material with similarity to seal.
In a concrete embodiment of the present invention, in the shield machine shield afterbody 850mm scope, be provided with three road WB-2 type wire brush sealing devices, can remove replacing wherein last one, between three road wire brushes, be filled with SFZ-864 type shield tail oil fat by shield tail grease pump, to reach the purpose of shutoff mud.In shield structure progradation, shield tail grease pump can constantly replenish shield tail oil fat and guarantee the reliability that the shield tail seals.
Stressed the improvements of this shield machine in the present invention, the part of not mentioning is the part that those of ordinary skills can finish according to the general knowledge of this area as dynamical system, hydraulic system, conventional sealing system etc.For example, finish the various functions that shield machine tunnels, finish the driving in tunnel by hydraulic control system; Cutterhead can be by the Electric Machine Control of 6 45KW, fuel delivery 240-300 liter/minute; The jacking system passes through the Electric Machine Control of 1 30KW, but but each jack of jacking system is a separate operaton, 50 liters/minute of fuel deliveries; By the Electric Machine Control of 1 60KW, 60 liters/minute of fuel deliveries, shared one of conveying worm, assembling machine, but separately operation; All hydraulic systems all are to realize the trend of oil circuit by switching valve; Action control all adopts electromagnetic valve to finish, button is installed concentratedly at the shield structure and is handled on the console, and assembling machine jack and shield structure jack assembly unit pattern adopt the control of two ground, outside can controlling on shield structure console, also can control on the assembling machine next door, to make things convenient for the duct piece assembling machine segment assembly; The cutter rotary sealing can be made up of a plurality of sealing rings with lip, be mainly used to stop slime water, soil sand enters cutter-devices system, and by the centralized lubricating system grease of in sealing ring, annotating, increase the back pressure of sealing ring and improve sealing ring and the lubricating system of contact surface, to guarantee reliability that seals or the like.
Claims (8)
1. composite balancing earth-pressure shielding machine, comprise: casing (1), cutterhead (2), Tu Cang (3), conveying worm (4) and propelling oil cylinder (6), it is characterized in that: described cutterhead is positioned at the casing front portion, be provided with simultaneously on the cutterhead and tear cutter (21) and bite (22), and the summary of the knife edge of described bite is by tearing after the cutter; Described native position in storehouse is in the rear portion of cutterhead, and the rear surface of Tu Cang is provided with injected hole (32), and the Tu Cang rear portion is equipped with air pressure balance equipment (5), and the Tu Cang bottom is provided with soil outlet (31); The bottom inlet of conveying worm joins with the soil outlet of Tu Cang; Described propelling oil cylinder is along the casing inner wall setting.
2. according to the described shield machine of claim 1, it is characterized in that: described conveying worm is provided with the twice gate on (4), hydraulically operated gate (41) and hand door (42).
3. according to the described shield machine of claim 2, it is characterized in that: described air pressure balance equipment (5) is communicated with air inlet port (51) and gas outlet (52) on the panel of native storehouse.
4. according to the described shield machine of claim 3, it is characterized in that: the panel of described Tu Cang (3) is provided with People's Bank of China's lock.
5. according to claim 1 or 4 described shield machines, it is characterized in that: the described propelling oil cylinder (6) that evenly is provided with along casing inner wall is the 10-50 platform, wherein, the long stroke of employing that is positioned at casing top advances oil cylinder, and is positioned at the employing short stroke propelling oil cylinder of casing bottom.
6. according to the described shield machine of claim 5, it is characterized in that: the described propelling oil cylinder (6) that evenly is provided with along casing inner wall be the 12-40 platform, and described long stroke propelling oil cylinder accounts for the 3-10 platform, and its stroke is 2000mm; And described short stroke advances oil cylinder to account for the 9-30 platform, and its stroke is 1150mm.
7. according to claim 1 or 6 described shield machines, it is characterized in that: the shield tail of described shield machine is provided with three road steel wire sealing brushes, and is filled with shield tail oil fat between the three road steel wire sealing brushes; Wherein, last one steel wire sealing brush can change.
8. according to claim 1 or 6 described shield machines, it is characterized in that: the shield tail of described shield machine in turn is provided with twice steel wire sealing brush with Y type rubber seal brush, fills polyamine fat between the sealing brush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101305900A CN100554645C (en) | 2005-12-14 | 2005-12-14 | A kind of composite balancing earth-pressure shielding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101305900A CN100554645C (en) | 2005-12-14 | 2005-12-14 | A kind of composite balancing earth-pressure shielding machine |
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| Publication Number | Publication Date |
|---|---|
| CN1982650A true CN1982650A (en) | 2007-06-20 |
| CN100554645C CN100554645C (en) | 2009-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101305900A Active CN100554645C (en) | 2005-12-14 | 2005-12-14 | A kind of composite balancing earth-pressure shielding machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101824988A (en) * | 2010-04-13 | 2010-09-08 | 唐兆连 | Shield machine |
| CN101936168A (en) * | 2010-08-04 | 2011-01-05 | 林辉 | Device for expanding adaptability of cutter head of earth pressure balancing (EPB) shield machine to soft ground |
| CN102230384A (en) * | 2011-07-01 | 2011-11-02 | 河海大学 | Earth pressure balance/ muddy water pressurization continuously-switching shield construction method |
| CN102278119A (en) * | 2011-07-01 | 2011-12-14 | 河海大学 | Construction method for muddy water pressurization shield of grid knife flywheel and construction equipment thereof |
| CN102287201A (en) * | 2011-08-04 | 2011-12-21 | 王茂 | Shield machine with center drill system |
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| CN101608550B (en) * | 2009-07-16 | 2012-09-05 | 上海地铁盾构设备工程有限公司 | Observation window device applied on shield machine |
| CN101749027B (en) * | 2010-01-13 | 2012-04-18 | 天津大学 | Multi-adaptive cutter head for shield machine |
| CN101824988A (en) * | 2010-04-13 | 2010-09-08 | 唐兆连 | Shield machine |
| CN101824988B (en) * | 2010-04-13 | 2012-08-15 | 唐兆连 | Shield machine |
| CN101936168B (en) * | 2010-08-04 | 2013-02-06 | 林辉 | Device for expanding adaptability of cutter head of earth pressure balancing (EPB) shield machine to soft ground |
| CN101936168A (en) * | 2010-08-04 | 2011-01-05 | 林辉 | Device for expanding adaptability of cutter head of earth pressure balancing (EPB) shield machine to soft ground |
| CN102278119A (en) * | 2011-07-01 | 2011-12-14 | 河海大学 | Construction method for muddy water pressurization shield of grid knife flywheel and construction equipment thereof |
| CN102230384A (en) * | 2011-07-01 | 2011-11-02 | 河海大学 | Earth pressure balance/ muddy water pressurization continuously-switching shield construction method |
| CN102287201A (en) * | 2011-08-04 | 2011-12-21 | 王茂 | Shield machine with center drill system |
| CN102287201B (en) * | 2011-08-04 | 2013-12-04 | 王茂 | Shield machine with center drill system |
| CN102704945A (en) * | 2012-06-29 | 2012-10-03 | 中国铁建重工集团有限公司 | Full-section rock ripper for long-distance heavy-gradient inclined shaft |
| CN102704945B (en) * | 2012-06-29 | 2014-10-22 | 中国铁建重工集团有限公司 | Full-section rock ripper for long-distance heavy-gradient inclined shaft |
| CN103046872A (en) * | 2013-01-21 | 2013-04-17 | 常州信息职业技术学院 | Combined multistage mud crushing drill |
| CN103061802B (en) * | 2013-01-28 | 2015-11-18 | 江苏凯宫隧道机械有限公司 | Shield machine uses rotary walkway |
| CN103061802A (en) * | 2013-01-28 | 2013-04-24 | 江苏凯宫隧道机械有限公司 | Rotating pedestrian path for shield tunneling machine |
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| CN100554645C (en) | 2009-10-28 |
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