CN103670432A - Soft foundation double circle shield machine head chip cutting device - Google Patents
Soft foundation double circle shield machine head chip cutting device Download PDFInfo
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- CN103670432A CN103670432A CN201310701465.5A CN201310701465A CN103670432A CN 103670432 A CN103670432 A CN 103670432A CN 201310701465 A CN201310701465 A CN 201310701465A CN 103670432 A CN103670432 A CN 103670432A
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Abstract
The invention relates to a soft foundation double circle shield machine head chip cutting device which is composed of a land pressure bearing device and a cutter chip cutting device. The land pressure bearing device is connected in a machine shell of a double circle shield machine in a sleeved mode. The cutter chip cutting device is arranged on the central rotating shaft of the double circle shield machine. After improved devices are further arranged on the chip cutting device, a cutter disk of the double circle shield machine is placed in a sealing soil cabin of the head part of the shield machine. The front of a 550mm-thick cutter disk spoke is aligned to the end face of a barrel body of the sealing soil cabin. At regular construction time, loose covering soil on the upper portion of the head of the shield machine is hindered by the barrel body of the sealing soil cabin of the machine head. The cutter disk is composed of the rotating spoke and the barrel of the cabin of the machine head and forms a dynamic grid. A mud outlet bin is relatively closed and generates certain resistance to entering loose soil bodies, so that the pressure of construction soil can recover to a preset land pressure range which is normally controlled, and the balance of preset soil pressure and soil outlet amount can be reached, the settling volume of the ground can be controlled within 5-6mm, and design requirements are satisfied.
Description
Technical field
The present invention relates to a kind of soft foundation Double-circular shield machine, especially a kind of soft foundation double-O-tube shield head cutting device.
Background technology
Interval along the section of stretching (station, Long Yang way station～ZSPD) Shuan garden shield structure in Shanghai Metro Line No. 2 line east, adopt Japan
iHIthe two gardens of the earth pressure balance shield machine of company carries out metro shield tunneling.The soil property of this area is poor, and the native liquidity index IL>1 in many locations, is stream and moulds state.In construction, Yuan Shuan garden shield machine can not reach predetermined soil pressure and the balance of the amount of being unearthed well, causes the amount of being unearthed greatly more than the unearthed amount of theory, to make the settling amount on ground exceed designing requirement.According to construction embodiment experience in the past, soft foundation in District of Shanghai, the general ground settlement in the comparatively ideal region of soil property >=-60mm～-70mm, particularly large in liquidity index, be stream and mould the soil property area of state, Double-circular shield machine construction, ground settlement maximum can reach 500mm ~ 600mm, is difficult to reach settling amount :+10mm～-30mm codes and standards.
The analysis of causes: carry out tunneling shield construction with shield machine, due to disturbance, the soil pressure in cutterhead the place ahead can change, produces initiatively or the soil pressure of passive state is operation pressure (or claiming support pressure).Ideal state, it should be controlled near earth pressue at rest value, makes the soil body keep dynamic balance state, and its pass is:
Pa＜Pi≈Po＜Pp
Wherein: Pa is that active earth pressure, Pi are that operation pressure, Po are earth pressue at rest; Pp is passive earth pressure.
Shield machine is at soft foundation, be particularly the soil property area that stream is moulded state, with conventional parameter, controls while advancing, and jacking counter-force is difficult to be set up, and can make shield machine thrust less than normal, and the amount of being unearthed is bigger than normal, the super sedimentation in ground; When strengthening shield machine fltting speed (or controlling the amount of being unearthed), thrust can be bigger than normal, and the amount of being unearthed reduces, earth heaving.This be because: shield machine thrust is less than normal, and the soil body is in down sliding, and during limit situation, the suitable minimum principal stress of horizontal stress, is active earth pressure; Shield machine thrust is bigger than normal, and the soil body is in upward sliding, and during limit situation, the suitable major principal stress of horizontal stress, is passive earth pressure.Be that active and passive soil pressure is maximum and minimum lateral soil pressure.
The sealing soil that the cutterhead of former Double-circular shield machine structure is placed in shield machine head out of my cabin side tool plate convergence bar has radial clearance with the native cabin of sealing, its excavation face soil body principle of mobile equilibrium figure is shown in Fig. 1, in Fig. 1, Pi1, Pi2 are that native storehouse soil pressure, Pr are that excavation face side direction earth pressue at rest, Pw are that excavation face water pressure, Po are earth pressue at rest.During conventional construction, head soil cabin with by the loosening soil body region of knife cutting part, form one and half open forms and go out clay bin.Under the effect of earth pressue at rest, the spoke that the loose soil body before cutter head of shield machine is rotated etc. stops and forms certain resistance, but the loose earthing in shield machine head top runs off with regard to very easily entering shield structure soil cabin, causes surface settlement.In the construction in this interval, our company had once taked to set soil pressure parameter balance driving, the amount of being unearthed and has controlled driving and Japanese expert and carry out the different control methods such as shield driving under instructing and carry out the operation of shield machine, all can not effectively control soil pressure and the balance of being unearthed and measuring, the settling amount on ground is met design requirement.
Therefore, how providing a kind of double-O-tube shield head cutting device that can effectively control soil pressure and unearthed amount is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
Object of the present invention is exactly in order effectively to control the balance of soil pressure and the amount of being unearthed in work progress, and a kind of simple in structure, soft foundation double-O-tube shield head cutting device that cost performance is high is provided.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of soft foundation double-O-tube shield head cutting device, by soil pressure bogey and tool-chip installation composition, be characterized in: soil pressure bogey is socketed in the casing of Double-circular shield machine, described tool-chip device is installed on the central rotating shaft of Double-circular shield machine.
Soil pressure bogey comprises two Φ 6520mm long joining sections, two circular arc interior lining panels, two R430mm long joining sections, two R430mm interior lining panels and two forward position reinforcements, the external diameter of described Φ 6520mm long joining section is identical with Double-circular shield machine casing external diameter and be welded in and strengthen on circular arc interior lining panel, the external diameter of described reinforcement circular arc interior lining panel is identical with Double-circular shield machine casing internal diameter and be socketed in the casing of Double-circular shield machine, described R430mm long joining section is welded between two the Φ 6520mm long joining sections in left and right, described R430mm interior lining panel is welded on two of left and right and strengthens between circular arc interior lining panel, described forward position reinforcement is welded on two of left and right Φ 6520mm long joining section and R430mm long joining section.
Tool-chip device comprises Φ 550mm big stick-means of intimidation, stirring rod and limit tool rest etc., described Φ 550mm big stick-means of intimidation is installed on the central rotating shaft of Double-circular shield machine disk, described stirring rod is installed on the interior survey of Φ 550mm big stick-means of intimidation, and described limit tool rest is installed on two sections of Φ 550mm big stick-means of intimidation.
Compare with existing cutting device, the present invention has the following advantages and beneficial effect:
Increase after modifying device, the cutterhead of two gardens shield machine is placed in the sealing soil cabin of shield machine head, flushes before thick 550mm cutterhead spoke with the native cabin of sealing body end surface, and its excavation face soil body principle of mobile equilibrium figure is shown in Fig. 2.During conventional construction, the loose earthing in shield machine head top is sealed native cabin cylindrical shell by head and intercepts.Cutterhead seemingly forms dynamic grid by the spoke rotating and head cabin cylinder, goes out clay bin relative closure, and the loose soil body entering is produced to certain resistance.The soil pressure that makes to construct can return to the soil pressure scope that normal control is set, and reaches predetermined soil pressure and the balance of the amount of being unearthed, and the settling amount on ground can be controlled in 5-6mm, meets design requirement.
Accompanying drawing explanation
Fig. 1 is excavation face soil body principle of mobile equilibrium figure before the transformation of shield structure;
Fig. 2 is excavation face soil body principle of mobile equilibrium figure after the transformation of shield structure;
Fig. 3 is the scheme of installation of double-O-tube shield head cutting device of the present invention;
Fig. 4 is the left view of Fig. 3;
Fig. 5 is the local structure for amplifying schematic diagram of A in Fig. 3;
Fig. 6 is the local structure for amplifying schematic diagram of B in Fig. 4.
The specific embodiment
Below will be described in further detail a kind of double-O-tube shield weak soil cutting device for modifying that is applied to of the present invention.For object of the present invention, feature are become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
As Fig. 3, shown in 4, a kind of soft foundation double-O-tube shield head cutting device, is comprised of soil pressure bogey 10 and tool-chip device 11, soil pressure bogey 10 is socketed in the casing 9 of Double-circular shield machine, and tool-chip device 11 is installed on the central rotating shaft of Double-circular shield machine.
As Fig. 5, shown in 6, soft foundation double-O-tube shield head cutting device comprises Φ 6520mm long joining section 1, strengthens circular arc interior lining panel 2, R430mm long joining section 3, R430mm interior lining panel 4, forward position reinforcement 5, stirring rod 6, Φ 550mm big stick-means of intimidation 7 and limit tool rest 8.
The external diameter of Φ 6520mm long joining section 1 is identical with Double-circular shield machine casing 9 external diameters and be welded in and strengthen on circular arc interior lining panel 2, strengthen the external diameter of circular arc interior lining panel 2 identical with Double-circular shield machine casing 9 internal diameters and be socketed in the casing 9 of Double-circular shield machine, R430mm long joining section 3 is welded between two the Φ 6520mm long joining sections 1 in left and right, R430mm interior lining panel 4 is welded on two of left and right and strengthens between circular arc interior lining panel 2, forward position reinforcement 5 is welded on two of left and right Φ 6520mm long joining section 1 and R430mm long joining section 3, Φ 550mm big stick-means of intimidation 7 is installed on the central rotating shaft of Double-circular shield machine disk, stirring rod 6 is installed on the interior survey of Φ 550mm big stick-means of intimidation 7, limit tool rest 8 is installed on two sections of Φ 550mm big stick-means of intimidation 7.
Claims (3)
1. a soft foundation double-O-tube shield head cutting device, by soil pressure bogey (10) and tool-chip device (11), formed, it is characterized in that: described soil pressure bogey (10) is socketed in the casing (9) of Double-circular shield machine, and described tool-chip device (11) is installed on the central rotating shaft of Double-circular shield machine.
2. soft foundation double-O-tube shield head cutting device according to claim 1, it is characterized in that: described soil pressure bogey (10) comprises two Φ 6520mm long joining sections (1), strengthen circular arc interior lining panel (2) for two, two R430mm long joining sections (3), two R430mm interior lining panels (4) and two forward position reinforcements (5), the external diameter of described Φ 6520mm long joining section (1) is identical with Double-circular shield machine casing (9) external diameter and be welded in and strengthen on circular arc interior lining panel (2), the external diameter of described reinforcement circular arc interior lining panel (2) is identical with Double-circular shield machine casing (9) internal diameter and be socketed in the casing of Double-circular shield machine, described R430mm long joining section (3) is welded between two the Φ 6520mm long joining sections in left and right (1), described R430mm interior lining panel (4) is welded on two of left and right and strengthens between circular arc interior lining panel (2), described forward position reinforcement (5) is welded on left and right two Φ 6520mm long joining sections (1) and R430mm long joining section (3).
3. soft foundation double-O-tube shield head cutting device according to claim 1, it is characterized in that: described tool-chip device (11) comprises Φ 550mm big stick-means of intimidation (7), stirring rod (6) and limit tool rest (8), described Φ 550mm big stick-means of intimidation (7) is installed on the central rotating shaft of Double-circular shield machine disk, described stirring rod (6) is installed on the interior survey of Φ 550mm big stick-means of intimidation (7), and described limit tool rest (8) is installed on two sections of Φ 550mm big stick-means of intimidation (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310701465.5A CN103670432A (en) | 2013-12-19 | 2013-12-19 | Soft foundation double circle shield machine head chip cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310701465.5A CN103670432A (en) | 2013-12-19 | 2013-12-19 | Soft foundation double circle shield machine head chip cutting device |
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| Publication Number | Publication Date |
|---|---|
| CN103670432A true CN103670432A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310701465.5A Pending CN103670432A (en) | 2013-12-19 | 2013-12-19 | Soft foundation double circle shield machine head chip cutting device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0742346A2 (en) * | 1995-05-12 | 1996-11-13 | Kawasaki Jukogyo Kabushiki Kaisha | Tunnel boring machine |
| CN1614197A (en) * | 2004-10-14 | 2005-05-11 | 上海隧道工程股份有限公司 | Direction turning cotnrol of double circular shielding |
| CN1740518A (en) * | 2005-09-22 | 2006-03-01 | 上海交通大学 | Deviation correcting pressure weight method for side rolling in double circle shield tunnel construction |
| CN201606081U (en) * | 2009-12-25 | 2010-10-13 | 上海市基础工程有限公司 | Double-circular shield machine |
| CN102108872A (en) * | 2009-12-25 | 2011-06-29 | 上海市基础工程有限公司 | Grouting replacement process for DOT (Double-O-Tube) shield machine |
-
2013
- 2013-12-19 CN CN201310701465.5A patent/CN103670432A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0742346A2 (en) * | 1995-05-12 | 1996-11-13 | Kawasaki Jukogyo Kabushiki Kaisha | Tunnel boring machine |
| CN1614197A (en) * | 2004-10-14 | 2005-05-11 | 上海隧道工程股份有限公司 | Direction turning cotnrol of double circular shielding |
| CN1740518A (en) * | 2005-09-22 | 2006-03-01 | 上海交通大学 | Deviation correcting pressure weight method for side rolling in double circle shield tunnel construction |
| CN201606081U (en) * | 2009-12-25 | 2010-10-13 | 上海市基础工程有限公司 | Double-circular shield machine |
| CN102108872A (en) * | 2009-12-25 | 2011-06-29 | 上海市基础工程有限公司 | Grouting replacement process for DOT (Double-O-Tube) shield machine |
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Application publication date: 20140326 |