CN101936168B - Device for expanding adaptability of cutter head of earth pressure balancing (EPB) shield machine to soft ground - Google Patents
Device for expanding adaptability of cutter head of earth pressure balancing (EPB) shield machine to soft ground Download PDFInfo
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- CN101936168B CN101936168B CN 201010245178 CN201010245178A CN101936168B CN 101936168 B CN101936168 B CN 101936168B CN 201010245178 CN201010245178 CN 201010245178 CN 201010245178 A CN201010245178 A CN 201010245178A CN 101936168 B CN101936168 B CN 101936168B
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Abstract
The invention relates to a device for expanding the adaptability of a cutter head of an earth pressure balancing (EPB) shield machine to a soft ground. The device comprises a cylindrical cutter head and a plurality of cutter beams on which cutters are arranged along the circumferential direction of the cutter head, wherein a fan-shaped opening for soil to flow inwards is formed between every two adjacent cutter beams; the fan-shaped opening on the circumferential side face of the cutter head is provided with a supporter for preventing instability of a soft soil body; and the supporter is in bolted connection with the cutter beams on both sides through the conventional bolt holes provided with edge scrapers on the cutter beams. During construction in the soft ground, the edge scrapers of the EPB shield machine of the invention are removed and the supporter is arranged, so that the aperture opening ratio of the shield machine is increased, soil entering a soil cabin can only enter the soil cabin from a fan-shaped position of the cylindrical surface of the cutter head when the shield machine is used for tunneling, the adaptability of the EPB shield machine tunneling to the soft ground is enhanced and the tunneling reliability and safety of the EPB shield machine tunneling in an unreinforced soft ground are guaranteed effectively.
Description
Technical field
The present invention relates to EPB (earth pressure balance) shield machine, is a kind of by expanding the EPB cutter head of shield machine to adapt to the device of soft stratum specifically.
Background technology
In Analysis on Shield Tunnel Driven Process, the cutterhead aperture opening ratio is one of very important technical indicator of shield machine.So-called aperture opening ratio refers to the ratio of cutter head of shield machine aperture area and cutterhead area, and the cutterhead aperture area comprises that not only cutterhead front openings area also comprises the lateral opening area.The cutterhead opening must decide its shape, size and configuration according to stability and the excavation efficient of geological conditions, Excavation.In the prior art, although there is the variable EPB shield machine of aperture opening ratio, be ZL200410010048 " a kind of device of capable of regulating open ratio in shield driving machine " such as the patent No., after the aperture opening ratio of EPB shield machine changes, still can't make the EPB shield machine adapt to work in soft stratum (such as water-rich sand layer).
At present, for soft stratum, if adopt the EPB shield machine construction, then must implement soil stabilization to the stratum in the scope of driving influence area, otherwise be to be difficult to or uncontrollable because tunneling construction causes the violent sedimentation on earth's surface, cause earth's surface structure (building) to build the generation of the pernicious safe major accident that thing (railway, pipeline, bridge, house etc.) destroys.Facts have proved the EPB shield machine, to the adaptive capacity of the soft stratum adaptive capacity well below the slurry-water balance type shield machine.Although the slurry-water balance type shield machine can adapt to and guarantee the safety on earth's surface when the driving of soft stratum, but because slurry shield machine is compared its equipment manufacturing cost height with balancing earth-pressure shielding machine, every linear meter(lin.m.) running cost and management cost are high, slurry making system, mud disposal system floor space are large, cause the construction land expropriation cost high.For this reason, shield structure contractor is when carrying out type selecting to shield machine, as long as when the soft stratum cumulative length is no more than tunnel length 10%, all select the EPB shield machine.Subsequently before driving, on the ground reinforcement measure is implemented in the location of soft stratum, but often sometimes existed the earth's surface because there being important structure (building) to build thing, and the situation that can't implement to reinforce, this moment, contractor can only take a risk to tunnel, and its consequence has just been well imagined.Whether can increase it to the compliance of soft stratum by the EPB cutter head of shield machine is carried out necessary transformation, can satisfy again adaptive needs when the soft or hard rock tunnels simultaneously.How changing the form of cutterhead, substantially possess reliability and the safety of slurry shield machine when the EPB shield machine is tunneled in unreinforced soft stratum, is the difficult point of current EPB shield machine construction.
Summary of the invention
For the weakness of above-mentioned EPB shield machine to soft stratum compliance extreme difference, technical problem to be solved by this invention provides the device that a kind of expansion EPB cutter head of shield machine simple in structure adapts to soft stratum, it can strengthen the compliance of EPB shield machine when soft stratum tunnels greatly, thereby improves its reliability and safety.
The present invention is achieved in that a kind of EPB of expansion cutter head of shield machine adapts to the device of soft stratum, comprise a cylindrical cutterhead and along several cutter beams of the circumferential distributing installation cutter of cutterhead, be formed with the sector open that flows into for earth between every two adjacent cutter beams, be positioned at the sector open place in cutterhead circumference side and be provided with the eyelid retractor that prevents the soft soil unstability, utilize the installation fastening bolt holes of the edge scraper that has changed, adopt high-strength bolt that this device is fastened on the cutterhead circumference, thereby just changed the aperture area of cutterhead, namely changed the aperture opening ratio of cutterhead.
The present invention also has following additional technical feature:
Each cutter beam is provided with the bolt hole of mounting edge scraper, and described eyelid retractor is by the corresponding connection of bolt hole on bolt and the two side tool beams.
Described eyelid retractor comprises the baffle plate that circumferentially arranges along cutterhead and along cutterhead the biside plate affixed with baffle plate is set radially that described biside plate is installed in respectively on its two side tools beam.
Described baffle plate is comprised of two flat boards of concrete mutually, forms the angle greater than 90 ° between two flat boards.
Described baffle plate cross section is curved.
The device that a kind of EPB of expansion cutter head of shield machine provided by the invention adapts to soft stratum compared with prior art has following advantage: be positioned at the sector open place in cutterhead circumference side among the present invention and be provided with the eyelid retractor that prevents the soft soil unstability, described eyelid retractor is fastened on the described cutterhead by the existing bolt hole of mounting edge scraper on the cutter beam, and operating process is not only convenient but also simple.When in soft stratum, constructing, the dismantle edge scraper of EPB shield machine of the present invention, described eyelid retractor is installed, so not only reduced cutterhead side sector open area, namely reduced the aperture opening ratio of shield machine, and can reduce even eliminate cutterhead along the opening of gravity direction, thereby effectively cut off the tunnel vault soft soil enters Tu Cang when unstability passage, the earth that forces shield machine to enter Tu Cang when driving can only enter Tu Cang from the front openings of cutterhead, even after the soft soil unstability of tunnel vault, under action of gravitation, also can't cause the particle of the soil body to run off, the displacement of the energy operative constraint tunnel vault soil body, thereby effectively control the earth's surface before, posterior settlement, realized the driving of EPB shield machine in soft stratum, strengthened the compliance of EPB shield machine when soft stratum tunnels, effective guarantee the EPB shield machine do not reinforcing soft stratum reliability and the safety in when driving.
Description of drawings
Fig. 1 is the structural representation that the edge scraper is installed on the EPB cutter head of shield machine;
Fig. 2 is the structural representation that eyelid retractor is installed on the cutterhead among the present invention;
Fig. 3 be among Fig. 1 A to local enlarged diagram;
Fig. 4 is the phantom drawing of eyelid retractor among the present invention;
Fig. 5 is the lateral view of eyelid retractor among the present invention.
The specific embodiment
Referring to Fig. 1 to Fig. 5, a kind of optimal way that a kind of EPB of expansion cutter head of shield machine of the present invention adapts to the device of soft stratum is shown, it comprises a cylindrical cutterhead 1 and along several cutter beams 2 of the circumferential distributing installation cutter of cutterhead, be formed with the sector open 3 that flows to for earth between every two adjacent cutter beams, be positioned at the sector open place in cutterhead circumference side and be provided with the eyelid retractor 4 that prevents the soft soil unstability.Be provided with altogether eight cutter beams on the cutterhead among the present invention, wherein the cutter beam of four spaces is installed hobboing cutter 21, and the cutter beam of other four spaces is installed scraper 22, but at the both sides of edges mounting edge scraper 23 of every cutter beam.Be formed with eight sector opens 3 between eight cutter beams, dismantle behind the edge scraper, can be positioned in cutterhead circumference side each sector open place the eyelid retractor 4 with enough rigidity is installed, described eyelid retractor utilizes the existing bolt hole of mounting edge scraper on the cutter beam, be connected with bolt hole on the two side tool beams by high-strength bolt, Renewal process is very simple and convenient.EPB shield machine of the present invention is in the process of driving, as when running into the soil property soft stratum, support at the supported device of earth of the tunnel vault at the sector open place of cutterhead circumference side, earth can't come off downwards, can not cause surface collapse, thereby guarantee that tunneling process carries out smoothly; As when running into the better stratum of soil property (soil, soft rock, hard rock), only need back out attachment bolt, with this device dismounting, be replaced with the edge scraper, to increase the shield machine aperture opening ratio, the compliance of recovery shield machine when the soft or hard rock tunnels.
At present, the EPB shield machine is not all installed this device when soft stratum tunnels both at home and abroad, does not remove the edge scraper, so that the pressure oscillation of Tu Cang directly feeds through to the country rock body of tunnel vault yet, and to the larger disturbance of country rock body generation, easily cause the sediment failure in the tunnel vault scope.As long as native storage capacity transient change, the soil body of a large amount of tunnel vaults will be poured into Tu Cang, and the edge scraper can to the additional disturbance of tunnel vault soil body generation, become the boost motor that the tunnel vault soil body enters Tu Cang.Owing to do not install eyelid retractor among the present invention additional, the EPB shield machine can't ensure the control of ground settlement, so also there is not so far successful story when unreinforced soft stratum driving.
In the present embodiment, described eyelid retractor 4 comprises the baffle plate 41 that circumferentially arranges along cutterhead and along cutterhead the biside plate 42 affixed with baffle plate is set radially that described biside plate is installed in respectively on its two side tools beam.Because being positioned at the sector open place in cutterhead circumference side is provided with baffle plate, baffle plate has occupied the part area of opening, so that the cutterhead aperture area reduces, this has not only reduced the aperture opening ratio of shield machine, and baffle plate can support the soil body of the sector open top of circumference side, thereby effectively cut off the tunnel vault soft soil enters Tu Cang when unstability passage, the earth that forces shield machine to enter Tu Cang when driving can only enter Tu Cang from the front openings of cutterhead, be that the sector open place that earth can only the cutterhead cylinder enters Tu Cang, thereby realized the driving of EPB shield machine in soft stratum, strengthened the compliance of EPB shield machine when soft stratum tunnels.Adopt eyelid retractor of the present invention, can effectively overcome the EPB shield machine in the weakness of soft stratum driving, the pressure oscillation of Tu Cang is to the disturbance of the tunnel vault soil body when greatly reducing to tunnel, because when the pressure oscillation of Tu Cang is passed to baffle plate, absorbed by baffle plate, can't be passed to the soil body of tunnel vault, thus reliability and the safety of effective guarantee EPB shield machine when not reinforcing the soft stratum driving.When shield machine enters soil body self-stability preferably when stratum (soil, soft rock, hard rock), only need back out eyelid retractor and be installed in bolt on the cutterhead, with the eyelid retractor dismounting, be replaced with the edge scraper, cutterhead just can recover it in compliance soft, when hard rock tunnels.In implementation process, described baffle plate is comprised of two flat boards of concrete mutually, forms the angle greater than 90 ° between two flat boards, and this angle can be suitable with the radian at cutterhead edge, certainly baffle plate also can be arranged to a curved baffle, and the radian at the radian of its cross sectional shape and cutterhead edge is suitable.
Above-described embodiment is only for explanation the present invention's; and be not to be limitation of the present invention; the those of ordinary skill in relevant technologies field; in the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also should belong to category of the present invention, and scope of patent protection of the present invention should be limited by each claim.
Claims (3)
1. expand the device that the EPB cutter head of shield machine adapts to soft stratum for one kind, comprise a cylindrical cutterhead (1) and along several cutter beams (2) of the circumferential distributing installation cutter of cutterhead, be formed with the sector open (3) that flows into for earth between every two adjacent cutter beams, it is characterized in that: be positioned at the sector open place in cutterhead circumference side and be provided with the eyelid retractor (4) that prevents the soft soil unstability, each cutter beam is provided with the bolt hole of mounting edge scraper (23), described eyelid retractor (4) is by the corresponding connection of bolt hole on bolt and the two side tool beams, described eyelid retractor (4) comprises the baffle plate (41) that circumferentially arranges along cutterhead and along cutterhead the biside plate affixed with baffle plate (42) is set radially that described biside plate is installed in respectively on its two side tools beam.
2. a kind of device that the EPB cutter head of shield machine adapts to soft stratum of expanding according to claim 1, it is characterized in that: described baffle plate (41) is comprised of two flat boards of concrete mutually, forms the angle greater than 90 ° between two flat boards.
3. a kind of device that the EPB cutter head of shield machine adapts to soft stratum of expanding according to claim 1, it is characterized in that: described baffle plate (41) cross section is curved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010245178 CN101936168B (en) | 2010-08-04 | 2010-08-04 | Device for expanding adaptability of cutter head of earth pressure balancing (EPB) shield machine to soft ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010245178 CN101936168B (en) | 2010-08-04 | 2010-08-04 | Device for expanding adaptability of cutter head of earth pressure balancing (EPB) shield machine to soft ground |
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| Publication Number | Publication Date |
|---|---|
| CN101936168A CN101936168A (en) | 2011-01-05 |
| CN101936168B true CN101936168B (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010245178 Expired - Fee Related CN101936168B (en) | 2010-08-04 | 2010-08-04 | Device for expanding adaptability of cutter head of earth pressure balancing (EPB) shield machine to soft ground |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113700492B (en) * | 2021-09-30 | 2023-05-23 | 中铁二十局集团第五工程有限公司 | Method for rapidly adjusting cutter configuration of cutter head of shield tunneling machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3170101D1 (en) * | 1980-06-30 | 1985-05-30 | Iseki Kaihatsu Koki | Shield tunneling method and machine therefor |
| CN1619102A (en) * | 2004-12-09 | 2005-05-25 | 上海隧道工程股份有限公司 | Cutter head for cutter head changeable entrydriving mechine |
| CN1982650A (en) * | 2005-12-14 | 2007-06-20 | 中国神华能源股份有限公司 | Composite balancing earth-pressure shielding machine |
| CN101440709A (en) * | 2008-12-12 | 2009-05-27 | 天津大学 | Cutter head center dreg stirring device of soil pressure balance shield machine |
| CN101539022A (en) * | 2009-04-24 | 2009-09-23 | 中铁二局股份有限公司 | Earth pressure balance shield machine cutterhead |
| CN201351496Y (en) * | 2009-02-09 | 2009-11-25 | 上海力行工程技术发展有限公司 | Dual-cutter large soil pressure balance shield machine |
| CN201666155U (en) * | 2010-08-04 | 2010-12-08 | 林辉 | Device for widening the adaptation of an EPB shield tunneling machine cutter-head for soft ground |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000248889A (en) * | 1999-02-25 | 2000-09-12 | Iseki Poly-Tech Inc | Shield machine |
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2010
- 2010-08-04 CN CN 201010245178 patent/CN101936168B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3170101D1 (en) * | 1980-06-30 | 1985-05-30 | Iseki Kaihatsu Koki | Shield tunneling method and machine therefor |
| CN1619102A (en) * | 2004-12-09 | 2005-05-25 | 上海隧道工程股份有限公司 | Cutter head for cutter head changeable entrydriving mechine |
| CN1982650A (en) * | 2005-12-14 | 2007-06-20 | 中国神华能源股份有限公司 | Composite balancing earth-pressure shielding machine |
| CN101440709A (en) * | 2008-12-12 | 2009-05-27 | 天津大学 | Cutter head center dreg stirring device of soil pressure balance shield machine |
| CN201351496Y (en) * | 2009-02-09 | 2009-11-25 | 上海力行工程技术发展有限公司 | Dual-cutter large soil pressure balance shield machine |
| CN101539022A (en) * | 2009-04-24 | 2009-09-23 | 中铁二局股份有限公司 | Earth pressure balance shield machine cutterhead |
| CN201666155U (en) * | 2010-08-04 | 2010-12-08 | 林辉 | Device for widening the adaptation of an EPB shield tunneling machine cutter-head for soft ground |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2000-248889A 2000.09.12 |
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| CN101936168A (en) | 2011-01-05 |
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Granted publication date: 20130206 Termination date: 20130804 |