CN202467850U - Earth pressure balanced shield for large-grain diameter sandy cobble stratum - Google Patents
Earth pressure balanced shield for large-grain diameter sandy cobble stratum Download PDFInfo
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- CN202467850U CN202467850U CN201220062771XU CN201220062771U CN202467850U CN 202467850 U CN202467850 U CN 202467850U CN 201220062771X U CN201220062771X U CN 201220062771XU CN 201220062771 U CN201220062771 U CN 201220062771U CN 202467850 U CN202467850 U CN 202467850U
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- shield
- earth pressure
- cutter
- grain diameter
- pressure balanced
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Abstract
The utility model relates to a shield, in particular to an earth pressure balanced shield for a large-grain diameter sandy cobble stratum, which solves many problems existing in a shield machine adopted by the large-grain diameter sandy cobble stratum when in construction. The earth pressure balanced shield for the large-grain diameter sandy cobble stratum comprises a case, a front shield, a panel-type annular cutter disk, a cutter, a tearing cutter and a hobbing cutter, wherein the cutter, the tearing cutter and the hobbing cutter are distributed on the annular cutter disk, the annular cutter disk is uniformly distributed with slag inlets, the slag inlets are in opened types, a cutting ring between the annular cutter disk and the front shield is welded with a baffle plate, a panel of the annular cutter disk is additionally provided with a wear-resisting layer, the center within the semi-diameter range of the annular cutter disk, the semi-diameter middle part and the periphery of the annular cutter disk are respectively distributed with foam filling holes, and the foam filling holes are respectively connected with corresponding filling pipelines. The earth pressure balanced shield for the large-grain diameter sandy cobble stratum, disclosed by the utility model has the advantages that the structure is simple, the improvement is reasonable, the design is ingenious, the tunneling speed is faster, a continuous, fast and balanced tunneling speed is formed, the construction quality is ensured, the construction period is shortened, and the earth pressure balanced shield for the large-grain diameter sandy cobble stratum is mainly suitable for a water-free large-grain diameter sandy cobble stratum and has obvious social benefit and economic benefit.
Description
Technical field
The utility model relates to a kind of shield structure, is specially a kind of big grain size pebble layer and uses earth pressure balanced shield, EPBS.
Background technology
Known big grain size pebble layer totally belongs to soft stratum; Form by deposition; A large amount of high-intensity big particle diameter cobbles are contained on this stratum again but then, aspect shield structure type selecting, both can not follow the soft stratum configuration fully; The driving mechanism that can not follow hard rock again disposes, and must consider the form of structure of cutterhead, the form and the arrangement of cutter during this shield machine type selecting.Present used cutter head of shield machine adopts panel type; Aperture opening ratio is 34%; And be provided with grid at slag inlet; Stop bowlder stone to get into native cabin, cutter is provided as cutting knife 92 and tears cutter 19 and be equipped with 18 on 17 cun hobboing cutters of twolip to, cutterhead panel and position, neighboring being equipped with the double-deck tungsten carbide heavy type of high abrasion on (band antifriction alloy head), the panel, and center cutter is that 5 twolips are torn cutter in advance.When the shield structure of this form of structure is constructed in big grain size pebble layer, there is following problem:
(1) cobble is very severe to the wearing and tearing of cutterhead and cutter;
(2) aperture opening ratio of cutter head of shield machine is little, easily mud lining;
(3) cutter head of shield machine is frequently stuck, restarts difficulty, even can't restart;
(4) driving speed is slow, can't form continuous, quick, balanced driving speed;
(5) the shield structure operational difficulty that opens the cabin, risk is high;
(6) the shield machine boring parameter fluctuates often, and drilling depth is unstable.
Summary of the invention
Shield machine existing above-mentioned problems when constructing that the utility model is adopted in order to solve existing big grain size pebble layer provide a kind of big grain size pebble layer to use earth pressure balanced shield, EPBS.
The utility model is to adopt following technical scheme to realize: big grain size pebble layer is used earth pressure balanced shield, EPBS; Comprise casing, anterior shield, panel type annular cutterhead and be distributed in cutting knife on the annular cutterhead, tear cutter and hobboing cutter; Be evenly equipped with slag inlet on the annular cutterhead; The innovative point of the utility model is that said slag inlet is an open type, and the otch boxing between annular cutterhead and the anterior shield is connected to the tilting baffle plate.
In order further to optimize the structure of this shield structure, improve its function, the utility model has also carried out following improvement, sets up wearing layer on the panel of said annular cutterhead.Center, radius centre and annular cutterhead periphery are arranged the foam injection hole respectively in the said annular cutterhead radius, and each foam injection hole connects corresponding filling line respectively.
Adopt the structure design of the utility model; Slag inlet is an open type; Increased the aperture opening ratio of cutterhead, the cobble in cutter head of shield machine the place ahead successfully excavates the cabin fast, is difficult for mud lining; Avoid the cobble cutter driving speed that weares and teares repeatedly in cutterhead the place ahead slow excessively, bring consuming excessively and reducing construction speed of cutter; Otch boxing between annular cutterhead and the anterior shield is connected to baffle plate, changes original back taper opening; Each foam injection hole connects corresponding filling line respectively, makes foam be injected into cutterhead the place ahead excavation face, in construction, guarantees injection pressure, prevents that dregs from stopping up injection hole; On the panel of cutterhead, set up wearing layer, tool setting is checked and regulated body and is strengthened, and to adapt to complex geological conditions, reduces tool wear, reduces number of changing knife.
In a word, the utility model is simple in structure, improvement is reasonable, design is ingenious, and driving speed is very fast; Form continuous, quick, balanced driving speed, guaranteed construction quality, shortened construction period; Mainly be applicable to anhydrous big grain size pebble layer, remarkable social benefit and economic benefit are arranged.
Description of drawings
Fig. 1 is the described cutter head structure sketch map of the utility model; Fig. 2 is the otch ring structure sketch map between described cutterhead of the utility model and the anterior shield;
Fig. 3 is that the K of baffle plate among Fig. 2 is to sketch map;
Fig. 4 is the said cutter head of shield machine injected system of a utility model structural representation;
Among the figure: the 1-anterior shield; 2-annular cutterhead; The 3-slag inlet; The 4-baffle plate; 5-foam injection hole; The 6-filling line; 7-Tu Cang; The 8-conveying worm.
The specific embodiment
Big grain size pebble layer use earth pressure balanced shield, EPBS, and is as shown in Figure 1, comprises casing, anterior shield 1, the annular cutterhead 2 of panel type and is distributed in cutting knife on the annular cutterhead, tears cutter and hobboing cutter; Be evenly equipped with slag inlet 3 on the annular cutterhead 2, set up wearing layer on the panel of annular cutterhead 2, slag inlet 3 is an open type; Grid plate on original cutterhead is cut off; Like Fig. 2, shown in 3, the otch boxing between annular cutterhead 2 and the anterior shield 1 is connected to tilting baffle plate 4, and the angle of baffle plate and horizontal direction is 30o.As shown in Figure 4, center, radius centre and cutterhead periphery are arranged foam injection hole 5 respectively in annular cutterhead 2 radius, and each foam injection hole connects corresponding filling line 6 respectively.
Case history:
No. ten line second phases 08 of Beijing Metro mark project Fan Feng interval begins to carry out shield-tunneling construction on March 10th, 2011; Adopt the described earth pressure balanced shield, EPBS of the utility model; Stuck phenomenon does not appear in annular cutterhead, conveying worm, and shield machine tunnels 8～14 rings every day, and disposable successful driving does not carry out cutter changing for 300 meters; Construction effect is good, and economic, society, environmental benefit are remarkable.
Claims (3)
1. a big grain size pebble layer is used earth pressure balanced shield, EPBS; Comprise casing, anterior shield (1), panel type annular cutterhead (2) and be distributed in cutting knife on the annular cutterhead, tear cutter and hobboing cutter; Be evenly equipped with slag inlet (3) on the annular cutterhead (2); It is characterized in that said slag inlet (3) is open type, the otch boxing between annular cutterhead (2) and the anterior shield (1) is connected to tilting baffle plate (4).
2. big grain size pebble layer according to claim 1 is used earth pressure balanced shield, EPBS, it is characterized in that setting up wearing layer on the panel of annular cutterhead (2).
3. big grain size pebble layer according to claim 1 and 2 is used earth pressure balanced shield, EPBS; It is characterized in that in the middle of center in annular cutterhead (2) radius, the radius and the cutterhead periphery is arranged foam injection hole (5) respectively, each foam injection hole connects corresponding filling line (6) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220062771XU CN202467850U (en) | 2012-02-24 | 2012-02-24 | Earth pressure balanced shield for large-grain diameter sandy cobble stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220062771XU CN202467850U (en) | 2012-02-24 | 2012-02-24 | Earth pressure balanced shield for large-grain diameter sandy cobble stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202467850U true CN202467850U (en) | 2012-10-03 |
Family
ID=46916015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220062771XU Expired - Fee Related CN202467850U (en) | 2012-02-24 | 2012-02-24 | Earth pressure balanced shield for large-grain diameter sandy cobble stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202467850U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060998A (en) * | 2014-07-03 | 2014-09-24 | 北京城建集团有限责任公司 | Large-diameter cobble and boulder splitting and crushing method of shield heavy tearing knife |
| CN111577306A (en) * | 2020-05-25 | 2020-08-25 | 中铁二十三局集团有限公司 | Improved structure applied to water-rich sandy gravel stratum shield machine and construction method |
| CN113006809A (en) * | 2021-04-22 | 2021-06-22 | 中交路桥建设有限公司 | Shield tunneling machine cutter head optimization method suitable for stratum rich in large-particle-size sandy pebbles |
| CN113982599A (en) * | 2021-10-09 | 2022-01-28 | 中铁七局集团有限公司 | Shield tunneling construction method for underwater cultural relic protection area of water-bearing sand pebble bed |
-
2012
- 2012-02-24 CN CN201220062771XU patent/CN202467850U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060998A (en) * | 2014-07-03 | 2014-09-24 | 北京城建集团有限责任公司 | Large-diameter cobble and boulder splitting and crushing method of shield heavy tearing knife |
| CN104060998B (en) * | 2014-07-03 | 2016-08-17 | 北京城建集团有限责任公司 | A kind of shield heavy type tearing cutter splitting breaking method to big particle diameter ovum erratic boulder |
| CN111577306A (en) * | 2020-05-25 | 2020-08-25 | 中铁二十三局集团有限公司 | Improved structure applied to water-rich sandy gravel stratum shield machine and construction method |
| CN113006809A (en) * | 2021-04-22 | 2021-06-22 | 中交路桥建设有限公司 | Shield tunneling machine cutter head optimization method suitable for stratum rich in large-particle-size sandy pebbles |
| CN113982599A (en) * | 2021-10-09 | 2022-01-28 | 中铁七局集团有限公司 | Shield tunneling construction method for underwater cultural relic protection area of water-bearing sand pebble bed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20200224 |