CN109882190A - A kind of multimode enclosed TBM and its construction method suitable for long mountain tunnel - Google Patents
A kind of multimode enclosed TBM and its construction method suitable for long mountain tunnel Download PDFInfo
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- CN109882190A CN109882190A CN201910287514.2A CN201910287514A CN109882190A CN 109882190 A CN109882190 A CN 109882190A CN 201910287514 A CN201910287514 A CN 201910287514A CN 109882190 A CN109882190 A CN 109882190A
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Abstract
The invention discloses a kind of multimode enclosed TBM and its construction method suitable for long mountain tunnel, solve the problems, such as that shield/TBM has a single function in the prior art, adaptability is bad.The present invention includes host and Rear impact, the Rear impact includes dregs transportation system and grouting system, main driving is equipped in the shield body, cabin is formed between main driving and cutterhead, cabin is equipped with mud circulation line, mud circulation line is connected with mud circulating system, main driving is equipped with flexible locking device and center convolution machine, shield body bottom is equipped with bottom and reserves screw machine, the front end of center convolution machine is located in flexible locking device, and center convolution machine and bottom reserve screw machine and be connected with dregs transportation system or mud circulating system.The present invention is using enclosed TBM mode as holotype, and muddy water mode, high-density mode, earth pressure balance mode, draining relief mode are auxiliary mode multimode enclosed TBM, are suitable for various working, and implementation pattern is switched fast, and improves drivage efficiency.
Description
Technical field
The present invention relates to technical field of tunnel construction, particularly relate to a kind of multimode enclosed suitable for long mountain tunnel
TBM and its construction method.
Background technique
At present according to having tunnel machine (shield/TBM) construction application experience, using shield as the mechanized construction of representative
The features such as equipment tunnels by its safety with pressure, stablizes excavation face is widely applied in shallow embedding short distance tunnel, is with hard rock TBM
The construction characteristic that the mechanization engineering method equipment of representative is rapidly and efficiently tunneled by it is applied over long distances, in great burying mountain tunnel
It is more and more.
The complexity differentiated is difficult to when long range, great burying mountain tunnel encounter the prominent sand of prominent mud, the high hydraulic pressure in part, crushed zone etc.
When stratum, to guarantee engineering construction progress and construction safety, the functions such as efficient, safe and reliable property is tunneled to rock tunnel(ling) machine and are mentioned
Higher requirement is gone out, shield/TBM of simple function has been unable to satisfy the demand of engineering.Therefore one kind is completely new can both drop
Low construction safety risk can save the rock tunnel(ling) machine of construction cost again and its construction is urgently suggested.
Summary of the invention
For the deficiency in above-mentioned background technique, the present invention proposes a kind of multimode enclosed suitable for long mountain tunnel
TBM and its construction method solve the problems, such as that shield/TBM has a single function in the prior art, adaptability is bad.
The technical scheme of the present invention is realized as follows: a kind of multimode enclosed TBM suitable for long mountain tunnel, including
Host and Rear impact, the host include shield body, and the front end of shield body is equipped with cutterhead, and the Rear impact includes dregs fortune
Defeated system and grouting system, the shield body is interior to be equipped with main driving, cabin is formed between main driving and cutterhead, cabin is equipped with mud
Circulation line, mud circulation line are connected with mud circulating system, and main driving is equipped with flexible locking device and center convolution
Machine, the bottom of shield body are equipped with bottom and reserve screw machine, and the front end of center convolution machine is located in flexible locking device, center convolution machine
Screw machine is reserved with bottom to be connected with dregs transportation system or mud circulating system.
The flexible locking device includes telescopic oil cylinder and sealing shroud, and sealing shroud is slidably connected with main driving, telescopic oil cylinder
One end be connected with main driving, the other end is connected with sealing shroud, the front end of sealing shroud is equipped with slag agitator, during slag agitator is located at
The front end of heart screw machine.
The back fixation of the cutterhead is equipped with cutterhead scraper plate, and the front end of center convolution machine passes through oscillating bearing and sealing shroud phase
Connection.
The dregs transportation system includes equipment belt feeder and continuous conveyor system, the front end of equipment belt feeder and center convolution
The reserved screw machine of machine or bottom is corresponding, and the rear end of equipment belt feeder is corresponding with continuous conveyor system.
The grouting system includes beans gravel system, rockfill grouting system and synchronous double-liquid grouting system, beans gravel system,
Rockfill grouting system can work independently with synchronous double-liquid grouting system.
The mud circulating system includes mud recycle unit and mud tube extension device, and the front end of mud circulation line connects
It is connected to inlet pipe road and plasma discharge pipeline, inlet pipe road and plasma discharge pipeline are connected with cabin；The rear end of mud circulation line connects
It is connected to mud recycle unit and mud tube extension device.
Mud dilution tank is reserved on the center convolution machine, mud dilution tank is connected with mud circulation line.
A kind of construction method of the multimode enclosed TBM suitable for long mountain tunnel, including following Construction Mode: 1, work as tunnel
Road is in stabilizing surrounding rock hole section, when development machine is without pressure driving, using enclosed TBM mode；2, when tunnel is in weak surrounding rock, mud of dashing forward
Gushing water, water-rich sand layer hole section, when development machine high pressure is tunneled, using mud and water balance mode: 3, when tunnel be in weak surrounding rock, prominent mud
High-density mode or earth pressure balance mould can be used when development machine low pressure is tunneled in gushing water crack and prominent mud gushing water cranny development hole section
Formula；4, when tunnel is in local pole high hydraulic pressure state, development machine shuts down pressure release, using draining relief mode.
Under enclosed TBM mode: slag agitator is stretched out, and center convolution machine is in the open state, inlet pipe road and plasma discharge pipeline
It closes, main driving band movable knife disc is tunneled, and the dregs that cutterhead excavates enters center spiral shell by cutterhead scum board, slag agitator
Then rotation machine is slagged tap by equipment belt feeder and continuous conveyor system, realization is efficiently slagged tap；Meanwhile it using beans gravel system and returning
It fills out grouting system and grouting and reinforcing operation is carried out to assembled good section of jurisdiction；
Under mud and water balance mode: slag agitator is withdrawn, and center convolution machine is in close state, and inlet pipe road and plasma discharge pipeline are opened
It opening, main driving band movable knife disc is tunneled, meanwhile, extended using inlet pipe road, plasma discharge pipeline, muddy water recycle unit and mud tube
Device realizes mud circulation, controls the pressure in cabin, it is ensured that excavation face is stablized, and realizes safe and continuous driving with pressure, meanwhile, it uses
Synchronous note dual slurry carries out grouting and reinforcing operation to assembled good section of jurisdiction；
Under high-density mode: slag agitator is stretched out, and center convolution machine is in the open state, and inlet pipe road is opened, and plasma discharge pipeline closes
It closing, main driving band movable knife disc is tunneled, meanwhile, the dense mud in inlet pipe road and the dregs in cabin are mixed using cutterhead
High density slurries are formed after stirring, high density slurries can stablize effective mud film of excavation face, with the driving with pressure of shield machine,
High density slurries are entered in center convolution machine by cutterhead scum board, are furnished with mud dilution tank at the slag notch of center convolution machine,
High density slurries, which enter mud dilution tank, to be improved, and the slurries after improvement utilize muddy water recycle unit and mud tube extension device
Mud circulation is completed, and then realizes low pressure variable density mode driving, meanwhile, assembled good section of jurisdiction is carried out with synchronous note dual slurry
Grouting and reinforcing operation；
Under earth pressure balance mode: when tunnel is in serious sand scall, and under face unstable state, slag agitator is stretched
Out, center convolution machine is in the open state, and inlet pipe road and plasma discharge pipeline are closed, and main driving band movable knife disc is tunneled, cutterhead
The dregs excavated enters center convolution machine by cutterhead scum board, slag agitator, then passes through equipment belt feeder and continuous skin
Band machine is slagged tap, and realizes that under-voltage half cabin driving is slagged tap；Meanwhile grouting and reinforcing is carried out to assembled good section of jurisdiction using synchronous note dual slurry
Operation；When under-voltage half cabin, which is tunneled, slags tap difficulty, slag agitator is withdrawn, and center convolution machine is in close state, inlet pipe road and row
It starches pipeline to close, equipment belt feeder is reserved screw machine with bottom and matched, and main driving band movable knife disc is tunneled, under cutterhead excavates
The dregs come enters cabin, then reserves screw machine, equipment belt feeder and continuous conveyor system through bottom and slags tap, realizes safety with pressure
Continuous driving；Meanwhile grouting and reinforcing operation is carried out to assembled good section of jurisdiction using synchronous note dual slurry；
In the case where draining relief mode: development machine is shut down, and slag agitator is withdrawn, and center convolution machine is in close state, and inlet pipe road is closed
It closes, plasma discharge pipeline is opened, and then realizes draining flood control using muddy water recycle unit and mud tube extension device.
The present invention is multi-mode TBM, and the TBM is using enclosed TBM mode as holotype, muddy water mode, high-density mode, soil pressure
Balanced mode, the multimode enclosed TBM with shield function that draining relief mode is auxiliary mode, are adapted to the long range mountain ridge
Tunnel is efficiently constructed, while can be coped with prominent mud gushing water, big cross section crushed zone etc. and be difficult to the construction risk prejudged, makes equipment can be with
It is switched fast for various situation implementation patterns, using best boring mode, utmostly plays equipment effectiveness, while improving mountain
Ridge tunnel boring efficiency and equipment tunnel safety, are a big innovation of constructing tunnel, promotional value with higher.
Detailed description of the invention
In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in describing below to embodiment makees letter
Singly introduce, it should be apparent that, drawings in the following description are only some embodiments of the invention, skill common for this field
For art personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is multimode enclosed TBM complete machine leading portion schematic diagram of the present invention.
Fig. 2 is multimode enclosed TBM complete machine back segment schematic diagram of the present invention.
Fig. 3 is the A of Fig. 1 to section view.
Fig. 4 is the B of Fig. 2 to section view.
Fig. 5 is the C of Fig. 2 to section view.
Fig. 6 is schematic diagram under enclosed TBM holotype of the present invention.
Fig. 7 is mud and water balance mode flowering structure schematic diagram of the present invention.
Fig. 8 is mud and water balance mode schematic illustration of the present invention.
Fig. 9 is high-density mode schematic illustration of the present invention.
Figure 10 is present invention draining relief mode schematic illustration.
Figure 11 is the flexible locking device schematic diagram in the open state of the present invention.
Figure 12 is that the flexible locking device of the present invention is in close state schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
As shown in Figs. 1-5, embodiment 1, a kind of multimode enclosed TBM suitable for long mountain tunnel, including host and after
Corollary system.The host includes shield body 20, and the front end of shield body 20 is equipped with cutterhead 1, identical as the cutterhead setting of existing TBM.Institute
Stating Rear impact includes dregs transportation system and grouting system, and dregs transportation system is used for the transport of dregs, and grouting system is used
Molding tunnel cross-section has been excavated in reinforcing.Main driving 4 is equipped in the shield body 20, main driving includes support frame and engine
Structure, the main cutterhead that is driven to provide power.Cabin 21 is formed between main driving 4 and cutterhead 1, cabin 21 is under enclosed TBM mode
Cabin is excavated, is muddy water cabin under mud and water balance mode.Cabin 21 is equipped with mud circulation line, and mud circulation line is followed with mud
Loop system is connected, and using devices such as the mud recycle units of Rear impact arrangement, realizes the indoor slip casting in cabin and plasma discharge, main
Driving 4 is equipped with flexible locking device 5 and center convolution machine 9, and the bottom of shield body is equipped with bottom and reserves screw machine 6, center convolution
The front end of machine 9 is located in flexible locking device 5, and center convolution machine 9 is mobile with flexible locking device 5, in flexible locking device 5
The lower on-off for realizing cabin and center convolution machine of effect, i.e. the closing and unlatching of center convolution machine, center convolution machine 9 and bottom are pre-
Screw machine 6 is stayed to be connected with dregs transportation system or mud circulating system.Under enclosed TBM mode, center convolution machine 9 and dregs
Transportation system is connected, and under high-density mode, center convolution machine 9 is connected with mud circulating system, under earth pressure balance mode
(when tunnel is in serious sand scall, and under face unstable state), center convolution machine 9 is connected with dregs transportation system
It connects, under earth pressure balance mode (when under-voltage half cabin, which is tunneled, slags tap difficulty), screw machine and dregs transportation system phase are reserved in bottom
Connection, according to operating condition, free switching is realized and efficiently, is targetedly tunneled.
Further, as is illustrated by figs. 11 and 12, the flexible locking device 5 includes telescopic oil cylinder 501 and sealing shroud 502,
Sealing shroud 502 4 is slidably connected with main driving, and telescopic oil cylinder 501 and sealing shroud 502 are arranged in parallel, one end of telescopic oil cylinder 501 with
Main driving 4 is connected, the other end is connected with sealing shroud 502, and under the action of telescopic oil cylinder, sealing shroud 502 is in main driving 4
Sliding.The front end of sealing shroud 502 is fixed with slag agitator 3, and slag agitator 3 is located at the front end of center convolution machine, for receiving cutterhead
Dregs under excavating, in use, telescopic oil cylinder stretches out, band movable sealing sleeve and slag agitator are moved backward, and realize that slag agitator is recovered to
In main driving, the closing in channel between cabin and center convolution machine is realized, i.e. center convolution organ closes, and telescopic oil cylinder is withdrawn, band
Movable sealing sleeve and slag agitator move forward, and realize that slag agitator stretches out main driving, realize channel between cabin and center convolution machine
It opens, i.e., center convolution machine is opened, and then realizes being quickly converted between various modes.The back fixation of the cutterhead 1 is equipped with
Cutterhead scraper plate 2, cutterhead scraper plate 2 can be used bolt and be fixedly connected on the bracket of cutterhead back, receive in cabin for scraping dregs,
The front end of center convolution machine 9 is connected by oscillating bearing with sealing shroud 502.Center convolution machine 9 carries out narrow spacing with sealing shroud 502
From synchronizing moving, the open and close in cabin are realized.
Embodiment 2, a kind of multimode enclosed TBM suitable for long mountain tunnel, the dregs transportation system includes equipment
It is opposite that screw machine 6 is reserved in belt feeder 11 and continuous conveyor system 13, the front end of equipment belt feeder 11 and center convolution machine 9 or bottom
It answers, i.e., reserves the changeable use of screw machine, when using center convolution machine, equipment belt feeder 11 using center convolution machine and bottom
Front end is corresponding with center convolution machine, for receiving the dregs in center convolution machine, when reserving screw machine using bottom, and equipment skin
Front end with machine 11 is corresponding with the reserved screw machine in bottom, for receiving the dregs in the reserved screw machine in bottom.Equipment belt feeder
11 rear end is corresponding with continuous conveyor system 13, for transporting dregs outside tunnel.The grouting system includes beans gravel system
12, rockfill grouting system 16 and synchronous double-liquid grouting system 17, and beans gravel system 12, rockfill grouting system 16 and synchronous biliquid
Grouting system 17 is same as the prior art, can independently work, according to different boring modes, can specific aim select different notes
Slurry mode.
Further, the mud circulating system includes mud recycle unit 14 and mud tube extension device 15, mud circulation
The front end of pipeline is connected with inlet pipe road 8 and plasma discharge pipeline 7, and inlet pipe road 8 and plasma discharge pipeline 7 are connected with cabin 21；Into
Slurry pipeline 8 is located at the top in cabin, and for the slip casting into cabin, plasma discharge pipeline 7 is located at the lower part in cabin, for will be in cabin
Slurries discharge.The rear end of mud circulation line is connected with mud recycle unit 14 and mud tube extension device 15, is followed by mud
Ring apparatus 14 and mud tube extension device 15 realize the circulation of mud.It is reserved with mud dilution tank 10 on the center convolution machine 9,
Mud dilution tank 10 is connected with mud tube.Under high-density mode, the mud in center convolution machine enter mud dilution tank into
Row improvement completes mud circulation then under muddy water recycle unit and the effect of mud tube extension device, and then realizes that low pressure becomes close
Degree mode driving.
Other structures are same as Example 1.
As illustrated in figures 6-10, embodiment 3, a kind of construction method of the multimode enclosed TBM suitable for long mountain tunnel, packet
It includes following Construction Mode: 1) being adopted when development machine is without pressure driving when tunnel is in stabilizing surrounding rock hole section (containing stable sand hole section)
With enclosed TBM mode；2) when tunnel is in weak surrounding rock, mud gushing water of dashing forward, water-rich sand layer hole section are adopted when development machine high pressure is tunneled
With mud and water balance mode；3) when tunnel is in weak surrounding rock, dash forward mud gushing water crack and prominent mud gushing water cranny development hole section, development machine
When low pressure is tunneled, high-density mode or earth pressure balance mode can be used, (according to tunnel situation, selecting different Construction Modes)；4)
When tunnel is in local pole high hydraulic pressure state, development machine shuts down pressure release, using draining relief mode.
Under enclosed TBM mode (no pressure driving): slag agitator is stretched out, and center convolution machine is in the open state, inlet pipe road
It is closed with plasma discharge pipeline, center convolution machine is corresponding with equipment belt feeder, and main driving band movable knife disc is tunneled, under cutterhead excavates
The dregs come enters center convolution machine by cutterhead scum board, slag agitator, is then gone out by equipment belt feeder and continuous conveyor system
Slag, realization are efficiently slagged tap；Meanwhile grouting and reinforcing work is carried out to assembled good section of jurisdiction using beans gravel system and rockfill grouting system
Industry.
At mud and water balance mode (high pressure boring mode, 3 ~ 10Bar of pressure): slag agitator is withdrawn, and center convolution machine is in
Closed state, inlet pipe road and plasma discharge pipeline are opened, and main driving band movable knife disc is tunneled, meanwhile, utilize inlet pipe road, plasma discharge
Pipeline, muddy water recycle unit and mud tube extension device realize mud circulation, control the pressure in cabin, it is ensured that excavation face is stablized,
Realize safe and continuous driving with pressure, meanwhile, grouting and reinforcing operation is carried out to assembled good section of jurisdiction using synchronous note dual slurry；
Under high-density mode (low pressure driving): slag agitator is stretched out, and center convolution machine is in the open state, and inlet pipe road is opened,
Plasma discharge pipeline is closed, and center convolution is connected to mud dilution tank, and mud dilution tank is connected with mud recycle unit, and owner drives band
Movable knife disc is tunneled, meanwhile, the dense mud in inlet pipe road and the dregs in cabin are formed after being mixed using cutterhead
High density slurries, high density slurries can stablize effective mud film of excavation face, with the driving with pressure of shield machine, high density slurries
Entered in center convolution machine by cutterhead scum board, is furnished with mud dilution tank, high density slurries at the slag notch of center convolution machine
It is improved into mud dilution tank, the slurries after improvement are completed mud using muddy water recycle unit and mud tube extension device and followed
Ring, and then realize low pressure variable density mode driving, meanwhile, grouting and reinforcing work is carried out to assembled good section of jurisdiction with synchronous note dual slurry
Industry.
Under earth pressure balance mode (low pressure driving, pressure < 3Bar): when tunnel is in serious sand scall, and area
Under the unstable state of face, slag agitator is stretched out, and center convolution machine is in the open state, and inlet pipe road and plasma discharge pipeline are closed, main drive
Dynamic band movable knife disc is tunneled, and the dregs that cutterhead excavates enters center convolution machine by cutterhead scum board, slag agitator, then
It is slagged tap by equipment belt feeder and continuous conveyor system, realizes that under-voltage half cabin driving is slagged tap；Meanwhile using synchronous note dual slurry to spelling
The section of jurisdiction installed carries out grouting and reinforcing operation；When under-voltage half cabin, which is tunneled, slags tap difficulty, slag agitator is withdrawn, and center convolution machine is in
Closed state, inlet pipe road and plasma discharge pipeline are closed, and equipment belt feeder is reserved screw machine with bottom and matched, main driving band moving knife
Disk is tunneled, and the dregs that cutterhead excavates enters cabin, then reserves screw machine, equipment belt feeder and continuous skin through bottom
Band machine is slagged tap, and realizes safe and continuous driving with pressure；Meanwhile grouting and reinforcing is carried out to assembled good section of jurisdiction using synchronous note dual slurry
Operation.
At draining relief mode (super-pressure driving, 10 ~ 15Bar of pressure): development machine is shut down, and slag agitator is withdrawn, center
Screw machine is in close state, and inlet pipe road is closed, and plasma discharge pipeline is opened, and is then extended using muddy water recycle unit and mud tube
Device realizes draining flood control.
Center convolution machine machine adds the multi-mode enclosed TBM of muddy water circulatory system to configure, and the mobility using mud is using
When closing chest strap die pressing type (such as Fig. 8), the scum board of cutterhead and the structure of center slag agitator need not be changed, TBM mode and muddy water mould
Formula can be completed to switch in moment, in bad grotto section driving, can keep the highest utilization rate of shield machine.
Other structures are same as Example 2.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of multimode enclosed TBM suitable for long mountain tunnel, including host and Rear impact, the host include shield
Body (20), the front end of shield body (20) are equipped with cutterhead (1), and the Rear impact includes dregs transportation system and grouting system,
It is characterized in that: being equipped with main driving (4) in the shield body (20), form cabin (21) between main driving (4) and cutterhead (1), cabin
(21) it is equipped with mud circulation line, mud circulation line is connected with mud circulating system, and main driving (4) is equipped with flexible envelope
Device (5) and center convolution machine (9) are closed, the bottom of shield body (20) is equipped with bottom and reserves screw machine (6), center convolution machine (9)
Front end is located in flexible locking device (5), and screw machine (6) and dregs transportation system or mud are reserved in center convolution machine (9) and bottom
The slurry circulatory system is connected.
2. the multimode enclosed TBM according to claim 1 suitable for long mountain tunnel, it is characterised in that: described flexible
Locking device (5) includes telescopic oil cylinder (501) and sealing shroud (502), and sealing shroud (502) is slidably connected with main driving (4), is stretched
One end of oil cylinder (501) is connected with main driving (4), the other end is connected with sealing shroud (502), the front end of sealing shroud (502)
Equipped with slag agitator (3), slag agitator (3) is located at the front end of center convolution machine (9).
3. the multimode enclosed TBM according to claim 2 suitable for long mountain tunnel, it is characterised in that: the cutterhead
(1) back fixation is equipped with cutterhead scraper plate (2), and the front end of center convolution machine (9) is connected by oscillating bearing with sealing shroud (502)
It connects.
4. the multimode enclosed TBM according to claim 1 or 2 or 3 suitable for long mountain tunnel, it is characterised in that: institute
Stating dregs transportation system includes equipment belt feeder (11) and continuous conveyor system (13), front end and the center spiral shell of equipment belt feeder (11)
Rotation machine (9) or bottom reserved screw machine (6) are corresponding, and the rear end of equipment belt feeder (11) is corresponding with continuous conveyor system (13).
5. the multimode enclosed TBM according to claim 1 or 2 or 3 suitable for long mountain tunnel, it is characterised in that: institute
Stating grouting system includes beans gravel system (12), rockfill grouting system (16) and synchronous double-liquid grouting system (17).
6. the multimode enclosed TBM according to claim 5 suitable for long mountain tunnel, it is characterised in that: the mud
The circulatory system includes mud recycle unit (14) and mud tube extension device (15), and the front end of mud circulation line is connected with into slurry
Pipeline (8) and plasma discharge pipeline (7), inlet pipe road (8) and plasma discharge pipeline (7) are connected with cabin (21)；Mud circulation line
Rear end be connected with mud recycle unit (14) and mud tube extension device (15).
7. the multimode enclosed TBM suitable for long mountain tunnel according to claim 1 or 6, it is characterised in that: in described
It is reserved on heart screw machine (9) mud dilution tank (10), mud dilution tank (10) is connected with mud circulation line.
8. a kind of construction method of the multimode enclosed TBM as described in claim 1 or 6 suitable for long mountain tunnel, special
Sign is: including following Construction Mode: 1) when tunnel is in stabilizing surrounding rock hole section, when development machine is without pressure driving, using enclosed TBM
Mode；2) when tunnel is in weak surrounding rock, mud gushing water of dashing forward, water-rich sand layer hole section, when development machine high pressure is tunneled, using mud and water balance
Mode: 3) when tunnel is in weak surrounding rock, dash forward mud gushing water crack and prominent mud gushing water cranny development hole section, development machine low pressure are tunneled
When, high-density mode or earth pressure balance mode can be used；4) when tunnel is in local pole high hydraulic pressure state, development machine shutdown is let out
Pressure, using draining relief mode.
9. the construction method of the multimode enclosed TBM according to claim 8 suitable for long mountain tunnel, feature exist
In:
Under enclosed TBM mode: slag agitator is stretched out, and center convolution machine is in the open state, and inlet pipe road and plasma discharge pipeline are closed,
Main driving band movable knife disc is tunneled, and the dregs that cutterhead excavates enters center convolution machine by cutterhead scum board, slag agitator,
Then it is slagged tap by equipment belt feeder and continuous conveyor system, realization is efficiently slagged tap；Meanwhile using beans gravel system and rockfill grouting
System carries out grouting and reinforcing operation to assembled good section of jurisdiction；
Under mud and water balance mode: slag agitator is recovered to main driving, and center convolution machine is in close state, inlet pipe road and plasma discharge
Pipeline is opened, and main driving band movable knife disc is tunneled, meanwhile, utilize inlet pipe road, plasma discharge pipeline, muddy water recycle unit and mud
Tube extension device realizes mud circulation, controls the pressure in cabin, it is ensured that excavation face is stablized, and realizes safe and continuous driving with pressure, together
When, grouting and reinforcing operation is carried out to assembled good section of jurisdiction using synchronous note dual slurry；
Under high-density mode: slag agitator is stretched out, and center convolution machine is in the open state, and inlet pipe road is opened, and plasma discharge pipeline closes
It closing, main driving band movable knife disc is tunneled, meanwhile, the dense mud in inlet pipe road and the dregs in cabin are mixed using cutterhead
High density slurries are formed after stirring, high density slurries can stablize effective mud film of excavation face, with the driving with pressure of shield machine,
High density slurries are entered in center convolution machine by cutterhead scum board, are furnished with mud dilution tank at the slag notch of center convolution machine,
High density slurries, which enter mud dilution tank, to be improved, and the slurries after improvement utilize muddy water recycle unit and mud tube extension device
Mud circulation is completed, and then realizes low pressure variable density mode driving, meanwhile, assembled good section of jurisdiction is carried out with synchronous note dual slurry
Grouting and reinforcing operation；
Under earth pressure balance mode: when tunnel is in serious sand scall, and under face unstable state, slag agitator is stretched
Out, center convolution machine is in the open state, and inlet pipe road and plasma discharge pipeline are closed, and main driving band movable knife disc is tunneled, cutterhead
The dregs excavated enters center convolution machine by cutterhead scum board, slag agitator, then passes through equipment belt feeder and continuous skin
Band machine is slagged tap, and realizes that under-voltage half cabin driving is slagged tap；Meanwhile grouting and reinforcing is carried out to assembled good section of jurisdiction using synchronous note dual slurry
Operation；When under-voltage half cabin, which is tunneled, slags tap difficulty, slag agitator is recovered to main driving, and center convolution machine is in close state, into slurry
Pipeline and plasma discharge pipeline are closed, and equipment belt feeder is reserved screw machine with bottom and matched, and main driving band movable knife disc is tunneled, knife
The dregs that disk excavates enters cabin, then reserves screw machine, equipment belt feeder and continuous conveyor system through bottom and slags tap, and realizes
Safe and continuous driving with pressure；Meanwhile grouting and reinforcing operation is carried out to assembled good section of jurisdiction using synchronous note dual slurry；
In the case where draining relief mode: development machine is shut down, and slag agitator is recovered to main driving, and center convolution machine is in close state, into
It starches pipeline to close, plasma discharge pipeline is opened, and then realizes draining flood control using muddy water recycle unit and mud tube extension device.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119914A (en) * | 2019-12-09 | 2020-05-08 | 中交天和机械设备制造有限公司 | Working mode conversion method of shield machine with adjustable density |
| CN112761654A (en) * | 2021-01-18 | 2021-05-07 | 中国铁建重工集团股份有限公司 | Soil pressure TBM dual-mode dual-support heading machine and construction method |
| CN112855188A (en) * | 2021-01-13 | 2021-05-28 | 中铁广州工程局集团有限公司 | Subway engineering soft soil stratum earth pressure balance shield construction method |
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| CN111119914B (en) * | 2019-12-09 | 2022-02-18 | 中交天和机械设备制造有限公司 | Working mode conversion method of shield machine with adjustable density |
| CN112855188A (en) * | 2021-01-13 | 2021-05-28 | 中铁广州工程局集团有限公司 | Subway engineering soft soil stratum earth pressure balance shield construction method |
| CN112761654A (en) * | 2021-01-18 | 2021-05-07 | 中国铁建重工集团股份有限公司 | Soil pressure TBM dual-mode dual-support heading machine and construction method |
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