CN102852527B - Cutter disc and cutter improving method for accelerating shield excavation in dense sand layer - Google Patents
Cutter disc and cutter improving method for accelerating shield excavation in dense sand layer Download PDFInfo
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- CN102852527B CN102852527B CN 201210119346 CN201210119346A CN102852527B CN 102852527 B CN102852527 B CN 102852527B CN 201210119346 CN201210119346 CN 201210119346 CN 201210119346 A CN201210119346 A CN 201210119346A CN 102852527 B CN102852527 B CN 102852527B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000004576 sand Substances 0.000 title claims abstract description 14
- 238000009412 basement excavation Methods 0.000 title abstract 2
- 238000003466 welding Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 10
- 239000002689 soil Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a cutter disc and cutter improving method for accelerating shield excavation in a dense sand layer, comprising the following steps of: 1) detaching a scraper bolt on a main arm of a central part of a cutter disc; 2) cutting off a scraper seat along a welding line along an anticlockwise direction; 3) cutting off a cutter which is close to the central part of the cutter disc of a shielding machine and has a smaller distance from the edge of the cutter disc along a panel; and 4) cutting off a leading cutter into two parts along a central anti-wearing block and symmetrically mounting on the position of the previous scraper so that the mounting height of the cutter is kept the same as that of the previous scraper; and clockwise rotating the previous angle for ninety degrees along to form the mounting angle. The cutter disc and cutter improving method has the beneficial effects that the torque of the cutter disc is reduced and the equipment performance of the shielding machine is guaranteed; meanwhile, the construction progress is accelerated; the risk of abrading the cutter is reduced and the cost of exchanging the cutter is saved; and a soil body cut by the cutter of the shielding machine can smoothly enter a closed cabin channel and the generation of a cutter disc mud cake is avoided, so that the pressure of a closed cabin is improved and the ground deposition is effectively controlled.
Description
Technical field
The present invention relates to the urban subway tunnel construction field, relate in particular to the knife disc tool of accelerating shield driving in a kind of dense sand stratum and improve one's methods.
Background technology
At present, the arrangement form of cutter head of shield machine cutter generally designs according to the hydrogeological conditions of the running tunnel of intending coming into operation, when the geology condition changes, original cutter form is difficult to adapt to current geological condition, cause the abnormal of relevant boring parameter, and then affect the integral construction speed of shield driving.Occurred when adapting to the construction in entering dense sand stratum of cutter head of shield machine that the powder land floor construction design boring parameter extremely, be mainly manifested in: the one, the cutterhead moment of torsion increases, near nominal torque, knife disc tool is worked under high load capacity for a long time, is easy to cause the wearing and tearing of cutter; The 2nd, driving speed is slow, and when easily forming mud cake in the centre of cutterhead, the soil body at mud lining position is difficult to be got off by knife disc tool cutting, has increased thus gross thrust and has reduced driving speed, cause construction speed slowly.The 3rd, surface settlement is wayward: because shield machine closed cabin internal pressure in dense sand stratum is difficult to set up, very easily cause the part to backbreak, produce the sedimentation on ground.
Summary of the invention
The invention discloses the knife disc tool of accelerating shield driving in a kind of dense sand stratum and improve one's methods, to solve the problem that runs in above-mentioned constructing tunnel.
The objective of the invention is to be achieved through the following technical solutions:
The knife disc tool of accelerating shield driving in a kind of dense sand stratum is improved one's methods, and comprises the following steps:
1) the scraper bolt on the principal arm of dismounting cutterhead centre;
2) along clockwise direction scraper base is cut off along weld seam, adopt the ovenstone cotton to cover cutterhead when cutting off surperficial, and carry out grinding process to cutting off face;
3) will cut off along panel near the less cutter of cutterhead Distances Between Neighboring Edge Points near the cutter head of shield machine centre and on auxiliary arm, and carry out grinding process to cutting off face; And
4) dual-pilot cutter is cut into two parts along the center wear-resistant block, symmetry is arranged on the position of original scraper, and Cutting tool installation manner height and former scraper are consistent, and setting angle is by former angle 90 degree that turn clockwise, and adopts wear resistance electrode to carry out built-up welding to cutter.
Beneficial effect of the present invention is: the cutterhead moment of torsion reduces, and the shield machine equipment performance is protected, and has accelerated simultaneously construction speed; Reduce the risk of tool wear, saved the expense of cutter changing; It is smooth and easy that the soil body of shield machine cutter cutting enters the closed cabin passage, avoided the generation of cutterhead mud cake, and closed cabin pressure is improved, and has effectively controlled surface settlement.
Description of drawings
The below is described in further detail the present invention with reference to the accompanying drawings.
Fig. 1 is the structural representation that has adopted the knife disc tool after the knife disc tool of accelerating shield driving in a kind of dense sand stratum is improved one's methods in embodiments of the invention;
Fig. 2 is the structural representation of the knife disc tool of the shield driving before improving in embodiments of the invention;
Fig. 3 is the front view of improvement of the dual-pilot cutter that in embodiments of the invention, in a kind of dense sand stratum, the knife disc tool of quickening shield driving is improved one's methods
Fig. 4 is the view of accelerating in a kind of dense sand stratum in embodiments of the invention after the cutting of the dual-pilot cutter that the knife disc tool of shield driving improves one's methods.
In figure:
1, the cutter principal arm cuts off face; 11 principal arm cutters; 12, auxiliary arm cutter; 2, the auxiliary arm of cutter cuts off face; 3, scraper base; 4, dual-pilot cutter; 41, dual-pilot cutter left part; 42, dual-pilot cutter right part.
The specific embodiment
In a kind of dense sand stratum of the present invention, the knife disc tool of quickening shield driving is improved one's methods and is comprised the following steps:
1) the scraper bolt on the principal arm of dismounting cutterhead centre;
2) along clockwise direction scraper base 3 is cut off along weld seam, adopt the ovenstone cotton to cover cutterhead when cutting off surperficial, and carry out grinding process to cutting off face;
3) with near the principal arm cutter 11 the cutter head of shield machine centre and auxiliary arm near the less auxiliary arm cutter 12 of cutterhead Distances Between Neighboring Edge Points with cut off along panel, and the cutter principal arm is cut off face 1 and the auxiliary arm of cutter cuts off face 2 and carry out grinding process; And
4) dual-pilot cutter 4 is cut into dual-pilot cutter left part 41 and dual-pilot cutter right part 42 two parts along the center wear-resistant block, symmetry is arranged on the position of original scraper, Cutting tool installation manner height and former scraper are consistent, setting angle is by former angle 90 degree that turn clockwise, and adopts wear resistance electrode to carry out built-up welding to cutter.
As shown in Fig. 1-4, the present invention reduces the quantity that identical Cutting trajectory is fixed a cutting tool under the prerequisite that does not change cutterhead agent structure and cutting power, to play the effect that increases aperture opening ratio, improves the mobility of the soil body, accelerates the speed of shield driving in dense sand stratum.For the cutting transformation of existing cutter, should avoid damaging wear-resistant block as far as possible, and keep the tightness of original welding.Cutterhead after the present invention improves is in the follow-up construction of shield tunnel, and driving speed improves a lot, and shield structure closed cabin pressure level-off has effectively been controlled surface settlement, has shortened the construction period, has reduced thus construction cost.
Although below only described the specific embodiment of the present invention example, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art can make various changes or modifications to these embodiments under the prerequisite that does not deviate from principle of the present invention and essence, but these changes or modification all fall into protection scope of the present invention.
Claims (1)
1. the knife disc tool of accelerating shield driving in a dense sand stratum is improved one's methods, and it is characterized in that, comprises the following steps:
1) the scraper bolt on the principal arm of dismounting cutterhead centre;
2) along clockwise direction scraper base is cut off along weld seam, adopt the ovenstone cotton to cover cutterhead when cutting off surperficial, and carry out grinding process to cutting off face;
3) will cut off along panel near the less cutter of cutterhead Distances Between Neighboring Edge Points near the cutter head of shield machine centre and on auxiliary arm, and carry out grinding process to cutting off face; And
4) dual-pilot cutter is cut into dual-pilot cutter left part and dual-pilot cutter right part two parts along the center wear-resistant block, symmetry is arranged on the position of original scraper, Cutting tool installation manner height and former scraper are consistent, and setting angle turn 90 degrees by former angle dextrorotation, and adopts wear resistance electrode to carry out built-up welding to cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210119346 CN102852527B (en) | 2012-04-23 | 2012-04-23 | Cutter disc and cutter improving method for accelerating shield excavation in dense sand layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210119346 CN102852527B (en) | 2012-04-23 | 2012-04-23 | Cutter disc and cutter improving method for accelerating shield excavation in dense sand layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102852527A CN102852527A (en) | 2013-01-02 |
| CN102852527B true CN102852527B (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210119346 Expired - Fee Related CN102852527B (en) | 2012-04-23 | 2012-04-23 | Cutter disc and cutter improving method for accelerating shield excavation in dense sand layer |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493514B (en) * | 2016-09-19 | 2018-11-09 | 南昌大学 | A kind of reproducing method of shield protection cutter |
| CN106869954B (en) * | 2017-03-31 | 2020-03-20 | 中交天和机械设备制造有限公司 | Fishtail cutter assembly for shield machine |
| CN107387104B (en) * | 2017-08-09 | 2023-10-17 | 中国铁建重工集团股份有限公司 | Jet shield tunneling machine and tunneling method |
| CN109883470A (en) * | 2019-01-18 | 2019-06-14 | 北京工业大学 | Cutter head of shield machine condition monitoring system and method |
| CN113982611B (en) * | 2021-10-27 | 2022-08-12 | 无锡中铁城轨装备有限公司 | Shield constructs cutter head convenient to tool changing |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2685571Y (en) * | 2003-12-16 | 2005-03-16 | 上海市基础工程公司 | Composite shield construction machine |
| CN100532787C (en) * | 2004-12-09 | 2009-08-26 | 上海隧道工程股份有限公司 | Cutter head for cutter head changeable tunnelling machine |
| CN201241710Y (en) * | 2008-08-22 | 2009-05-20 | 中国建筑一局(集团)有限公司 | Sand cobble stratum shield cutter head |
| CN101749027B (en) * | 2010-01-13 | 2012-04-18 | 天津大学 | Multi-adaptive cutter head for shield machine |
| CN201671634U (en) * | 2010-04-29 | 2010-12-15 | 宏润建设集团股份有限公司 | Shield cutter |
| CN202055830U (en) * | 2011-01-08 | 2011-11-30 | 山东天工岩土工程设备有限公司 | Combined central cutter of shielding machine |
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2012
- 2012-04-23 CN CN 201210119346 patent/CN102852527B/en not_active Expired - Fee Related
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| CN102852527A (en) | 2013-01-02 |
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Granted publication date: 20131106 |
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