CN105221157B - WSS grouting and reinforcings assist gas pressure cutter replacing method in shield tunnel - Google Patents
WSS grouting and reinforcings assist gas pressure cutter replacing method in shield tunnel Download PDFInfo
- Publication number
- CN105221157B CN105221157B CN201510608240.4A CN201510608240A CN105221157B CN 105221157 B CN105221157 B CN 105221157B CN 201510608240 A CN201510608240 A CN 201510608240A CN 105221157 B CN105221157 B CN 105221157B
- Authority
- CN
- China
- Prior art keywords
- shield
- slip casting
- grouting
- hole
- reinforcings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses WSS grouting and reinforcings assist gas pressure cutter replacing method in a kind of shield tunnel, including step：First, soil stabilization before tool changing, process is as follows：101st, slip casting putting up platform：Slip casting platform is set up in the shield body of shield machine, slip casting platform is located in middle shield；102nd, rig is in place：Rig is installed on slip casting platform；103rd, drilling and slip casting：Multiple injected holes in the soil body on the outside of shield body are drilled and slip casting respectively；Multiple injected holes are the drilling by being crept into multiple radial holes soil body from the front to the back on the outside of the shield body for being set on middle shield；Angle between injected hole and shield body central axis is 11 °~12.5 °；2nd, tool changing：After institute's injection slurry solidifies in step 1034, the cutter on cutterhead is changed.The inventive method step is simple, reasonable in design, easy to operate and safety coefficient is high, using effect is good, can effectively solve shield machine tool changing problem when ground does not reinforce space.
Description
Technical field
It is auxiliary more particularly, to WSS grouting and reinforcings in a kind of shield tunnel the invention belongs to tunneling shield technical field of construction
Help air pressure cutter replacing method.
Background technology
Shield method is a kind of Fully-mechanized construction method of modern constructing tunnel, and the plant equipment that it is mainly used is shield
Machine, is divided into earth pressure balanced shield, EPBS and slurry balance shield two types, wherein being used with earth pressure balanced shield, EPBS more.Shield machine exists
After carrying out soil cutting and catalase, and shield machine long distance driving by cutter in tunnel excavating process, especially firmly
When rock stratum or hard-soft heterogeneous ground shield-tunneling construction, cutter inevitably produces eccentric wear and damages ring, if carrying out knife not in time
The replacing of tool and continue driving, gently cannot then ensure normal drivage efficiency, it is heavy then can make shield machine cannot tunneling construction, or even
Influence the life-span of shield machine.Therefore, the shield machine tool changing that carries out opening a position in work progress is necessary work.
The method of conventional gas tool changing has following two：Conventional air pressure tool changing and ground pretreatment air pressure tool changing.Wherein, often
Rule air pressure tool changing is the air compressor machine and auxiliary gas booster carried using shield, the soil body is carried out it is with air pressure capable of being increased, by the water in native storehouse,
Soil air enters line replacement, replaces original Water And Earth Pressures with air pressure, sets up the balance of air pressure and Water And Earth Pressures out of my cabin in native storehouse；
Then, personnel enter carries out operation in storehouse of burying.The condition of conventional air pressure tool changing is that soil body sealing is air tight, and the method cannot be in pine
Carried out in the scattered soil body.
Ground pretreatment air pressure tool changing is to determine tool changing place in advance, and three axes agitating pile, rotary churning pile are used in advance on ground
The soil body is reinforced in advance Deng soil stabilization measure, strengthens the self-stability of the soil body；Then, cutter head of shield machine enters stabilization zone
Afterwards, normal pressure is carried out to open a position tool changing.Pretreatment normal pressure tool changing construction technology is simple, and short time limit, consolidation effect is good, but to ground
Ground requires height, and expropriation of land and reparation are difficult.In broken rock, broken ground or the poor location of other geological conditions carries out shield
During construction, the current most common method of tool changing soil stabilization is added respectively in face of cutterhead stratum all around by ground
Gu, can be opened a position tool changing after reaching reinforcing purpose.And some surface states are complicated, pipeline is more or due to construction of structures influence,
Ground does not reinforce space, and in order to complete the replacing of cutter, difficulty is very big.
WSS two fluid groutings (hereinafter referred to as WSS slip castings) technology originates from Japan, is applied than wide in Taiwan.During WSS is
The Pinyin abbreviation of literary ungauged regions two fluid grouting.WSS slurry injection techniques are using after double pipe drill hole of drilling machine to desired depth, using one
Platform synchronous grouting machine slip casting.Slurries have two kinds, i.e. A liquid and B liquid or A liquid and C liquid, the slurry that two kinds of slurries pass through double pipe end
Liquid mixer is sufficiently mixed.Implement orientation, quantitative, level pressure slip casting using electronic monitoring means during slip casting, make the space of rock-soil layer
Or full of slurries and solidify between hole, the purpose of rock-soil layer proterties is changed to reach.Thus, a kind of method and step letter need to be designed
WSS grouting and reinforcings assist gas pressure is changed in the shield tunnel that single, reasonable in design, easy to operate and safety coefficient is high, using effect is good
Knife method, can effectively solve shield machine tool changing problem when ground does not reinforce space.
The content of the invention
The technical problems to be solved by the invention are for above-mentioned deficiency of the prior art, there is provided a kind of shield tunnel
Interior WSS grouting and reinforcings assist gas pressure cutter replacing method, its method and step is simple, reasonable in design, easy to operate and safety coefficient is high, make
It is good with effect, can effectively solve shield machine tool changing problem when ground does not reinforce space.
In order to solve the above technical problems, the technical solution adopted by the present invention is：WSS grouting and reinforcings are auxiliary in a kind of shield tunnel
Help air pressure cutter replacing method, it is characterised in that the method is comprised the following steps：
Soil stabilization before step one, tool changing, process is as follows：
Step 101, slip casting putting up platform：Slip casting platform is set up in the shield body of shield machine, the shield body is by anterior shield, middle shield
Assemble from front to back with shield tail, the slip casting platform is located in the middle shield；The anterior shield front portion is provided with cutterhead；
Step 102, rig are in place：Rig is installed in slip casting platform described in step one；
Step 103, drilling and slip casting：Multiple injected holes in the soil body on the outside of the shield body are drilled and noted respectively
Slurry；
Multiple injected holes be by multiple radial holes for being set on the middle shield from the front to the back on the outside of the shield body
The soil body in drilling formed drilling；Multiple radial holes are along the circumferential direction laid in the middle and upper part and its equal position of the middle shield
In on the same cross section of the middle shield；Multiple injected holes are gradually inclined upwardly from the front to the back, multiple injected holes
A, wherein A=11 °~12.5 ° are with the angle between the shield body central axis；The equal position in front end of multiple injected holes
In cutterhead front, and spacing between the front end of each injected hole and the cutterhead is 1.5m~2.5m；
The drilling of multiple injected holes and grouting method all same；Injected hole any one described is drilled and slip casting
When, comprise the following steps：
Step 1031, small punching：Stop drilling after creeping into 1.5m~2.5m from the front to the back using the rig, after acquisition
Portion drills；
Step 1032, sealing of hole：Injection hole sealing agent, sealing of hole is carried out to the drilling of rear portion described in step 1031；
Step 1033, follow-up drilling：After the completion of sealing of hole, continue to creep into from the front to the back using the rig, until completing note
Starch the boring procedure in hole；
Step 1034, slip casting：Using WSS slip casting methods and by injected hole described in step 1033, to shield body outside
The soil body carry out grouting and reinforcing；
In step 1031 in small punching, step 1032 in sealing of hole and step 1033 in follow-up boring procedure, to shield machine
Native storehouse internal pressure carry out monitor in real time, and the internal pressure of the Tu Cang is controlled between 1.5bar~2.0bar；Step
In rapid 1034 during slip casting, the internal pressure to the Tu Cang carries out monitor in real time；When the internal pressure of the Tu Cang is more than P
When, stop slip casting；When the internal pressure of the Tu Cang is dropped between 1.5bar~2.0bar, slip casting is further continued for；Wherein, P
=2.5bar~2.8bar；
Step 2, tool changing：After institute's injection slurry solidifies in step 1034, the cutter on the cutterhead is changed.
WSS grouting and reinforcings assist gas pressure cutter replacing method in above-mentioned shield tunnel, it is characterized in that：Slip casting process in step 1034
In, rotate the once cutterhead every 50min~70min.
WSS grouting and reinforcings assist gas pressure cutter replacing method in above-mentioned shield tunnel, it is characterized in that：In step 1034 slip casting it
Before, first using grouting equipment to cement mortar or bentonite slurry is injected in the native storehouse, until filling up the Tu Cang；
Also, during injection cement mortar or bentonite slurry, the internal pressure to the Tu Cang carries out monitor in real time,
And control between 1.5bar~2.0bar the internal pressure of the Tu Cang.
WSS grouting and reinforcings assist gas pressure cutter replacing method in above-mentioned shield tunnel, it is characterized in that：A=described in step 103
11.8°；The identical length of multiple injected holes is same, and the length of multiple injected holes is 7.5m~8.5m.
WSS grouting and reinforcings assist gas pressure cutter replacing method in above-mentioned shield tunnel, it is characterized in that：Slip casting is carried out in step 1034
Before, above the shield machine and it is front and rear 10 meters in the range of ground on lay settlement observation point；Slip casting in step 1034
During, utilize laid settlement observation point to be observed surface subsidence situation.
WSS grouting and reinforcings assist gas pressure cutter replacing method in above-mentioned shield tunnel, it is characterized in that：To the shield in step 103
Multiple injected holes in the external side soil body are drilled and during slip casting respectively, along clockwise direction or in the counterclockwise direction by it is preceding extremely
Multiple injected holes are drilled and slip casting respectively afterwards.
WSS grouting and reinforcings assist gas pressure cutter replacing method in above-mentioned shield tunnel, it is characterized in that：Slip casting described in step 101
Platform includes support frame and the flat board being laid on support frame as described above, and shown support frame is scaffold, the height of the scaffold
For 4m~4.5m and its width are 2.8m~4.5m.
WSS grouting and reinforcings assist gas pressure cutter replacing method in above-mentioned shield tunnel, it is characterized in that：Slip casting described in step 103
The quantity in hole is four；The quantity of the radial hole is four, and four radial holes include two left sides for being located at the middle shield
Left radial hole and two right radial holes being located on the right side wall of the middle shield on the wall of side, two left radial holes
With two right radial holes in symmetrical laying.
WSS grouting and reinforcings assist gas pressure cutter replacing method in above-mentioned shield tunnel, it is characterized in that：Tool changing is carried out in step 2
When, using normal pressure tool changing method, the cutter on the cutterhead is changed.
WSS grouting and reinforcings assist gas pressure cutter replacing method in above-mentioned shield tunnel, it is characterized in that：Slip casting is carried out in step 1034
When, slip casting is carried out using retrusive slip casting method, grouting pressure is 0.2MPa~0.3MPa.
The present invention has advantages below compared with prior art：
1st, easy construction and cutter replacing method step are simple, and it is convenient to realize.
2nd, reasonable in design, actual exchanging knives process mainly includes two steps of soil stabilization and tool changing, wherein tool changing before tool changing
Preceding soil stabilization includes that slip casting putting up platform, rig are in place and drill and three steps of slip casting, using the note set up in middle shield
Starch platform and drilled and slip casting by the multiple radial holes opened up on middle shield, before to the soil body above cutterhead and face
Necromancer body carries out grouting and reinforcing, and cost of investment is low and realizes conveniently, and effectively can just be gone up with otch ring the cutterhead of reinforcing shield machine
The soil body of side, to strengthen the stability of the cutterhead top soil body.
3rd, the injected hole using effect of drilling via formations is good, and the angle between injected hole and shield body central axis is 11 °~
12.5 °, the front end of injected hole is respectively positioned on cutterhead front and the spacing between injected hole front end and cutterhead is 1.5m~2.5m, passes through
Multiple injected holes of drilling via formations can carry out easy, effectively reinforcing to the soil body on the outside of shield body, and soil stabilization is good.
4th, the boring procedure of injected hole is reasonable in design and realizes that convenient, using effect is good, and boring procedure is safe and reliable, real
When border is drilled, drilling is stopped after first creeping into 1.5m~2.5m from the front to the back using rig, obtain rear portion drilling；Reinject envelope
Hole agent, sealing of hole is carried out to rear portion drilling, in case during followed by drilling and slip casting, muddy water and slurries outside shield body flow into shield machine
It is interior；After the completion of sealing of hole, continue to creep into from the front to the back using rig, until completing the boring procedure of injected hole.
5th, using conventional WSS slip casting methods, easy to operate, realization is conveniently and slip casting effect is good, by face for slip casting
The front soil body carries out WSS slip castings, reinforces the front of tunnel heading soil body, is easy to the foundation of air pressure in native storehouse, it is ensured that air pressure tool changing it is suitable
Profit is carried out.
6th, tool changing efficiency high and do not influence the safety coefficient in construction period, and exchanging knives process very high, can effectively protect
Card tool changing work progress quickly, is effectively carried out.
7th, practical value is high and using effect is good, using WSS grouting and reinforcings assist gas pressure tool changing mode in tunnel, can be effective
Solve ground do not possess grouting and reinforcing condition and in the case of cutterhead position features as poor geologic condition does not possess air pressure tool changing or not difficulty
Topic, enhancing shield machine shutdown inspection, the security of tool changing, reduces downtime, improves shield driving efficiency, there is preferable society
And economic benefit.
The application conditions of conventional gas tool changing operation technique are that stratum is closely knit air tight or ground possesses stratum consolidation bar
The broken scall of part, when thering is building not possess ground and reinforce condition for broken scall and ground, using this hair
It is bright carry out tool changing can be effectively ensured operation of calming the anger it is smooth, safety carry out, expanded the scope of application of operation of calming the anger, afterwards
Can be widely used in subway work；And without any precondition when the present invention carries out tool changing, thus solve existing shield
Shield machine cutter when structure tool changing mode is without correspondence tool changing condition changes problem.
8th, it is widely applicable, can effectively be applicable into all shield machine tool changing constructions based on earth pressure balance.
In sum, the inventive method step is simple, reasonable in design, easy to operate and safety coefficient is high, using effect is good,
Shield machine tool changing problem when ground does not reinforce space can effectively be solved.
Below by drawings and Examples, technical scheme is described in further detail.
Brief description of the drawings
Fig. 1 is method of the present invention FB(flow block).
Fig. 2 is Construction State figure of the invention.
Fig. 3 is the installation position figure of injected hole of the present invention.
Description of reference numerals:
1-shield machine；2-injected hole；3-radial hole；
4-scaffold；5-walkway board；6-soil stabilization.
Specific embodiment
WSS grouting and reinforcing assist gas pressure cutter replacing methods in a kind of shield tunnel as shown in Figure 1, comprise the following steps：
Soil stabilization before step one, tool changing, process is as follows：
Step 101, slip casting putting up platform：As shown in Fig. 2 slip casting platform is set up in the shield body of shield machine 1, the shield body
Assembled from front to back by anterior shield, middle shield and shield tail, the slip casting platform is located in the middle shield；The anterior shield is anterior to be installed
There is cutterhead；
Step 102, rig are in place：Rig is installed in slip casting platform described in step one；
Step 103, drilling and slip casting：Multiple injected holes 2 in the soil body on the outside of the shield body are drilled and noted respectively
Slurry；
With reference to Fig. 3, multiple injected holes 2 are from the front to the back in institute by the multiple radial holes 3 set on the middle shield
State the drilling that drilling is formed in the soil body on the outside of shield body；Multiple radial holes 3 are along the circumferential direction laid in the middle shield
Top and its be respectively positioned on the same cross section of the middle shield；Multiple injected holes 2 are gradually inclined upwardly from the front to the back, many
Angle between the individual injected hole 2 and the shield body central axis is A, wherein A=11 °~12.5 °；Multiple slip castings
The front end in hole 2 is respectively positioned on cutterhead front, and spacing between the front end of each injected hole 2 and the cutterhead is
1.5m~2.5m；
The drilling of multiple injected holes 2 and grouting method all same；Injected hole any one described 2 is drilled and noted
During slurry, comprise the following steps：
Step 1031, small punching：Stop drilling after creeping into 1.5m~2.5m from the front to the back using the rig, after acquisition
Portion drills；
Step 1032, sealing of hole：Injection hole sealing agent, sealing of hole is carried out to the drilling of rear portion described in step 1031；
Step 1033, follow-up drilling：After the completion of sealing of hole, continue to creep into from the front to the back using the rig, until completing note
Starch the boring procedure in hole 2；
Step 1034, slip casting：Using WSS slip casting methods and by injected hole 2 described in step 1033, to shield body outside
The soil body carry out grouting and reinforcing；
In step 1031 in small punching, step 1032 in sealing of hole and step 1033 in follow-up boring procedure, to shield machine 1
Native storehouse internal pressure carry out monitor in real time, and the internal pressure of the Tu Cang is controlled between 1.5bar~2.0bar；Step
In rapid 1034 during slip casting, the internal pressure to the Tu Cang carries out monitor in real time；When the internal pressure of the Tu Cang is more than P
When, stop slip casting；When the internal pressure of the Tu Cang is dropped between 1.5bar~2.0bar, slip casting is further continued for；Wherein, P
=2.5bar~2.8bar；
Step 2, tool changing：After institute's injection slurry solidifies in step 1034, the cutter on the cutterhead is changed.
In the present embodiment, region residing for multiple injected holes 2 is soil stabilization area 6 in step 103.
During practice of construction, in step 1034 during slip casting, the once cutterhead is rotated every 50min~70min.
In the present embodiment, in step 1034 during slip casting, the once cutterhead is rotated every 1h.Actual mechanical process
In, can according to specific needs, the time interval to rotating the cutterhead is adjusted accordingly.
Cutterhead is lived admittedly to avoid slurries during slip casting in step 103 from being flowed into the native storehouse, in step 1034 before slip casting,
First using grouting equipment to cement mortar or bentonite slurry is injected in the native storehouse, until filling up the Tu Cang；
Also, during injection cement mortar or bentonite slurry, the internal pressure to the Tu Cang carries out monitor in real time,
And control between 1.5bar~2.0bar the internal pressure of the Tu Cang.
In the present embodiment, using grouting equipment to injecting bentonite slurry in the native storehouse.
During practice of construction, it would however also be possible to employ grouting equipment in the native storehouse to injecting cement mortar.
Also, during using grouting equipment to cement mortar or bentonite slurry is injected in the native storehouse, using shield machine 1
Screw conveyor machine and the grouting equipment worked asynchronously with the screw conveyor machine carry out Tu Cang displacement fillings, the screw conveyor machine
Native storehouse lower sidewall in shield machine 1, is correspondingly arranged on for the screw conveyor machine and institute on the side wall of the Tu Cang
State the soil outlet and grouting port of grouting equipment installation；And when carrying out Tu Cang displacement fillings, by the screw conveyor machine by Tu Cang
Internal all soil are gradually discharged from native storehouse from the bottom to top, and in soil from the bottom to top gradually from discharge process in native storehouse
In, by the grouting equipment from top to bottom it is synchronous soil is discharged after native storehouse internal cavities be filled, until by Tu Cang
Interior all soil all replace with cement mortar or bentonite slurry, then complete from top to bottom all to replace the soil in native storehouse
It is changed to the Tu Cang displacement filling process of cement mortar or bentonite slurry.
In the present embodiment, A=11.8 ° described in step 103.
The identical length of multiple injected holes 2 is same, and the length of multiple injected holes 2 is 7.5m~8.5m.This
In embodiment, the length of multiple injected holes 2 is 8m.
In the present embodiment, step 1031 stops drilling after creeping into 2m from the front to the back using the rig, i.e., described rear portion is bored
The length L1=2m in hole.Correspondingly, the length L2=of the front side hole section being located in the injected hole 2 on front side of the drilling of the rear portion
6m。
During practice of construction, can according to specific needs, the value size to A, L1 and L2 is adjusted accordingly respectively.
In the present embodiment, the multiple injected holes 2 in the soil body on the outside of the shield body are drilled and noted respectively in step 103
During slurry, multiple injected holes 2 are drilled and slip casting respectively from front to back along clockwise direction or in the counterclockwise direction.
During practice of construction, slip casting platform described in step 101 includes support frame and the flat board being laid on support frame as described above,
Shown support frame is scaffold 4, and the height of the scaffold 4 is 4m~4.5m and its width is 2.8m~4.5m.
In the present embodiment, the height of the scaffold 4 is 4.3m and its width is 3m.
In the present embodiment, the flat board is walkway board 5, is consolidated using iron wire between the walkway board 5 and scaffold 4
It is fixed.
In the present embodiment, before carrying out slip casting in step 1034, above the shield machine and it is front and rear 10 meters in the range of
Settlement observation point is laid on ground；In step 1034 during slip casting, laid settlement observation point is utilized to surface subsidence
Situation is observed.
Thus, after the completion of the settlement observation point is laid, first to the initial settlement value at each settlement observation point installation position
Recorded；In step 103 drilling and slip casting during, monitoring in every 2 hours is once settled, and note is synchronized to monitoring result
Record.
In the present embodiment, P=2.5bar.During practice of construction, can according to specific needs, the value size to P is carried out
Corresponding adjustment.Thus, when carrying out slip casting in step 1034, slip casting is stopped after the native storehouse internal pressure reaches 2.5bar, treat
The native storehouse internal pressure is further continued for carrying out slip casting after being down between 1.5bar~2.0bar, until reinforce completing.
In the present embodiment, the quantity of injected hole 2 described in step 103 is four；The quantity of the radial hole 3 is four,
Four radial holes 3 are located at the middle shield including two left radial holes being located on the left side wall of the middle shield and two
Right radial hole on right side wall, two left radial holes and two right radial holes are in symmetrical laying.
The shield body of the shield machine 1 is shield shell, and the quantity of set radial hole 3 is 8 on the middle shield of the shield machine 1.
Drilled in the present invention and slip casting, from 4 radial holes 3 for being laid in the middle shield middle and upper part, referred to Fig. 2.Also,
The radial hole 3 is the advance geologic inspecting hole set on the middle shield.
In step 1031 during small punching, first by the radial hole 3 block ring flange dismantle, then radially hole 3 to
Drill 2m outside shield body；Then, drilling is stopped, starting to inject the hole sealing agent carries out sealing of hole, in order to avoid followed by drilling and slip casting
When, muddy water and slurries outside shield body are flowed into shield machine 1；After sealing of hole, and then crept into, drilling depth length overall length is
8m, cutterhead front about 2m, stops drilling afterwards, starts slip casting.
In the present embodiment, when carrying out slip casting in step 1034, slip casting is carried out using retrusive slip casting method, grouting pressure is
0.2MPa~0.3MPa.
Thus, when carrying out slip casting in step 1034, to control based on grouting pressure, a point multiple sections are noted from front to back
Slurry, grouting pressure is 0.2MPa~0.3MPa；After grouting pressure reaches 0.3MPa, retreated, then carried out next sections
Slip casting, untill having noted.
In the present embodiment, rig described in step 102 is ZJY-250 type rigs.
Also, when carrying out slip casting in step 1034, the drilling rod of the ZJY-250 types rig is Grouting Pipe.
During practice of construction, after the completion for the treatment of the slip casting putting up platform, the slip casting for being used WSS slip casting methods using jack
System is lifted on the slip casting platform direction for adjusting the rig drilling again, carries out the preparation before drilling.
In the present embodiment, the ZJY-250 types rig can freely adjust bore angle, and drilling rod can make as Grouting Pipe in itself
With, and can be used to inject the dual slurry of WSS slip casting methods use.
When carrying out grouting and reinforcing to the soil body on the outside of the shield body using WSS slip casting methods in step 1034, the note for being used
Paste-making method is the conventional grouting method of WSS slip castings, and the dual slurry injected is the conventional slurries of WSS slip castings.In the present embodiment, institute
Dual slurry is injected for A liquid and B liquid are uniformly mixed and its proportion is 1.3~1.5, and wherein A liquid is cement mortar, the water for being used
Mud is Portland cement, and cement grade is No. 425；B liquid is waterglass, when the Baume degrees of waterglass is 40 ° of B é, initial set
Between for the set strength of 2min~3min and its 2h be 3MPa~4MPa.
During practice of construction, the dual slurry injected can also be the conventional slurries of other WSS slip castings.
In the present embodiment, hole sealing agent described in step 1032 is phosphoric acid.
During practice of construction, it would however also be possible to employ other types of hole sealing agent.
In the present embodiment, when carrying out tool changing in step 2, using normal pressure tool changing method, the cutter on the cutterhead is carried out more
Change.One is often changed cutter, the space of cutter the week side of boss after replacing need to have been blocked using gauze.
Also, when being changed to the cutter on the cutterhead, using beating boring tool to the cement bonded sand that is set in native storehouse
Lumps or the bentonite slurry to being injected in the native storehouse are carried out in manual cleaning, and cement bonded sand lumps scale removal process, synchronous right
Cutter on the cutterhead is changed one by one.
Wherein, in cement bonded sand lumps scale removal process, while the cement bonded sand lumps to being set in native storehouse cuts, on one side
Cutter to digging out is changed, and often digs out a cutter, and this cutter dug out is changed immediately, until by shield
Untill needing all cutters changed all to change on structure machine 1, then the exchanging knives process of shield machine 1 is completed.
After the completion of tool changing, got rid of poverty method according to conventional shield machine, shield machine 1 is got rid of poverty；And after shield machine 1 is got rid of poverty,
Air pressure is first set up in native storehouse using supercharging equipment, and enables that added air pressure in native storehouse supports the soil body of face, afterwards
According to conventional shield machine propulsion method, the shield machine 1 after being pressurizeed in native storehouse is advanced.
The above, is only presently preferred embodiments of the present invention, and not the present invention is imposed any restrictions, every according to the present invention
Any simple modification, change and equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention
In the protection domain of art scheme.
Claims (10)
1. WSS grouting and reinforcings assist gas pressure cutter replacing method in a kind of shield tunnel, it is characterised in that the method is comprised the following steps：
Soil stabilization before step one, tool changing, process is as follows：
Step 101, slip casting putting up platform：Slip casting platform is set up in the shield body of shield machine (1), the shield body is by anterior shield, middle shield
Assemble from front to back with shield tail, the slip casting platform is located in the middle shield；The anterior shield front portion is provided with cutterhead；
Step 102, rig are in place：Rig is installed in slip casting platform described in step one；
Step 103, drilling and slip casting：Multiple injected holes (2) in the soil body on the outside of the shield body are drilled and slip casting respectively；
Multiple injected holes (2) be by multiple radial holes (3) for being set on the middle shield from the front to the back outside the shield body
The drilling that drilling is formed in the soil body of side；Multiple radial holes (3) be along the circumferential direction laid in the middle and upper part of the middle shield and
It is respectively positioned on the same cross section of the middle shield；Multiple injected holes (2) are gradually inclined upwardly from the front to the back, Duo Gesuo
State the angle between injected hole (2) and the shield body central axis and be A, wherein A=11 °~12.5 °；Multiple injected holes
(2) front end is respectively positioned on cutterhead front, and each injected hole (2) front end and the cutterhead between spacing be
1.5m~2.5m；
The drilling of multiple injected holes (2) and grouting method all same；Injected hole any one described (2) is drilled and noted
During slurry, comprise the following steps：
Step 1031, small punching：Stop drilling after creeping into 1.5m~2.5m from the front to the back using the rig, obtain rear portion and bore
Hole；
Step 1032, sealing of hole：Injection hole sealing agent, sealing of hole is carried out to the drilling of rear portion described in step 1031；
Step 1033, follow-up drilling：After the completion of sealing of hole, continue to creep into from the front to the back using the rig, until completing injected hole
(2) boring procedure；
Step 1034, slip casting：Using WSS slip casting methods and by injected hole described in step 1033 (2), on the outside of the shield body
The soil body carries out grouting and reinforcing；
In step 1031 in small punching, step 1032 in sealing of hole and step 1033 in follow-up boring procedure, to shield machine (1)
Native storehouse internal pressure carries out monitor in real time, and the internal pressure of the Tu Cang is controlled between 1.5bar~2.0bar；Step
In 1034 during slip casting, the internal pressure to the Tu Cang carries out monitor in real time；When the internal pressure of the Tu Cang is more than P
When, stop slip casting；When the internal pressure of the Tu Cang is dropped between 1.5bar~2.0bar, slip casting is further continued for；Wherein, P
=2.5bar~2.8bar；
Step 2, tool changing：After institute's injection slurry solidifies in step 1034, the cutter on the cutterhead is changed.
2. according to WSS grouting and reinforcings assist gas pressure cutter replacing method in the shield tunnel described in claim 1, it is characterised in that：Step
In rapid 1034 during slip casting, the once cutterhead is rotated every 50min~70min.
3. according to WSS grouting and reinforcings assist gas pressure cutter replacing method in the shield tunnel described in claim 1 or 2, it is characterised in that：
In step 1034 before slip casting, first using grouting equipment to cement mortar or bentonite slurry is injected in the native storehouse, until filling out
The full Tu Cang；
Also, during injection cement mortar or bentonite slurry, the internal pressure to the Tu Cang carries out monitor in real time, and will
The internal pressure of the Tu Cang is controlled between 1.5bar~2.0bar.
4. according to WSS grouting and reinforcings assist gas pressure cutter replacing method in the shield tunnel described in claim 1 or 2, it is characterised in that：
A=11.8 ° described in step 103；The identical length of multiple injected holes (2) is same, and multiple injected holes (2) length
Degree is 7.5m~8.5m.
5. according to WSS grouting and reinforcings assist gas pressure cutter replacing method in the shield tunnel described in claim 1 or 2, it is characterised in that：
Before carrying out slip casting in step 1034, above the shield machine and it is front and rear 10 meters in the range of ground on lay settlement observation
Point；In step 1034 during slip casting, laid settlement observation point is utilized to be observed surface subsidence situation.
6. according to WSS grouting and reinforcings assist gas pressure cutter replacing method in the shield tunnel described in claim 1 or 2, it is characterised in that：
The multiple injected holes (2) in the soil body on the outside of the shield body are drilled respectively in step 103 and during slip casting, along clockwise direction
Or multiple injected holes (2) are drilled and slip casting respectively from front to back in the counterclockwise direction.
7. according to WSS grouting and reinforcings assist gas pressure cutter replacing method in the shield tunnel described in claim 1 or 2, it is characterised in that：
Slip casting platform described in step 101 includes support frame and the flat board being laid on support frame as described above, and shown support frame is scaffold
(4), the height of the scaffold (4) is 4m~4.5m and its width is 2.8m~4.5m.
8. according to WSS grouting and reinforcings assist gas pressure cutter replacing method in the shield tunnel described in claim 1 or 2, it is characterised in that：
The quantity of injected hole described in step 103 (2) is four；The quantity of the radial hole (3) is four, four radial holes
(3) including two left radial holes being located on the left side wall of the middle shield and two right sides being located on the right side wall of the middle shield
Side radial hole, two left radial holes and two right radial holes are in symmetrical laying.
9. according to WSS grouting and reinforcings assist gas pressure cutter replacing method in the shield tunnel described in claim 1 or 2, it is characterised in that：
When carrying out tool changing in step 2, using normal pressure tool changing method, the cutter on the cutterhead is changed.
10., according to WSS grouting and reinforcings assist gas pressure cutter replacing method in the shield tunnel described in claim 1 or 2, its feature exists
In：When carrying out slip casting in step 1034, slip casting is carried out using retrusive slip casting method, grouting pressure is 0.2MPa~0.3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608240.4A CN105221157B (en) | 2015-09-22 | 2015-09-22 | WSS grouting and reinforcings assist gas pressure cutter replacing method in shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608240.4A CN105221157B (en) | 2015-09-22 | 2015-09-22 | WSS grouting and reinforcings assist gas pressure cutter replacing method in shield tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105221157A CN105221157A (en) | 2016-01-06 |
| CN105221157B true CN105221157B (en) | 2017-06-16 |
Family
ID=54990380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510608240.4A Active CN105221157B (en) | 2015-09-22 | 2015-09-22 | WSS grouting and reinforcings assist gas pressure cutter replacing method in shield tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105221157B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971637A (en) * | 2015-03-12 | 2016-09-28 | 中铁隆工程集团有限公司 | Application of WSS construction method in shield end reinforcement of water-rich sand layer |
| CN105971638A (en) * | 2015-03-12 | 2016-09-28 | 中铁隆工程集团有限公司 | Application of WSS construction method in shield tool changing reinforcement of water-rich sand layer |
| CN105736004B (en) * | 2016-03-11 | 2018-01-09 | 广州轨道交通建设监理有限公司 | Shield is opened a position pressurize panelling construction method with weighing apparatus shield mud air pressure |
| CN113323675B (en) * | 2021-05-19 | 2023-05-30 | 广州轨道交通建设监理有限公司 | Shield pressurized system and pressurized warehouse entry reinforcing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000291384A (en) * | 1999-04-05 | 2000-10-17 | Chubu Electric Power Co Inc | Method of replacing cutter bit of shield machine and cutter retracting mechanism of shield machine |
| JP2001107684A (en) * | 1999-10-05 | 2001-04-17 | Kawasaki Heavy Ind Ltd | Shield excavator cutter replacement method and shield excavator |
| CN101539023A (en) * | 2008-03-21 | 2009-09-23 | 中铁二局股份有限公司 | Shield machine belt pressure chamber opening operation construction method |
| CN101666231A (en) * | 2009-06-24 | 2010-03-10 | 中铁隧道股份有限公司 | Shield machine warehouse entry method |
| CN102052079A (en) * | 2010-11-19 | 2011-05-11 | 中铁一局集团有限公司 | Method for exchanging tool of shield machine for tunnel construction |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09303088A (en) * | 1996-05-20 | 1997-11-25 | Nippon Shibitsuku Consultant Kk | Method for replacing cutter bit for shield machine |
-
2015
- 2015-09-22 CN CN201510608240.4A patent/CN105221157B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000291384A (en) * | 1999-04-05 | 2000-10-17 | Chubu Electric Power Co Inc | Method of replacing cutter bit of shield machine and cutter retracting mechanism of shield machine |
| JP2001107684A (en) * | 1999-10-05 | 2001-04-17 | Kawasaki Heavy Ind Ltd | Shield excavator cutter replacement method and shield excavator |
| CN101539023A (en) * | 2008-03-21 | 2009-09-23 | 中铁二局股份有限公司 | Shield machine belt pressure chamber opening operation construction method |
| CN101666231A (en) * | 2009-06-24 | 2010-03-10 | 中铁隧道股份有限公司 | Shield machine warehouse entry method |
| CN102052079A (en) * | 2010-11-19 | 2011-05-11 | 中铁一局集团有限公司 | Method for exchanging tool of shield machine for tunnel construction |
Non-Patent Citations (3)
| Title |
|---|
| 恶劣地质条件下质构过铁路开仓换刀施工的技术分析与处理措施;刘晓文;《科技咨询导报》;20071011(第29期);84-85 * |
| 浅析不稳定地质条件下换刀的地层加固;赵向东;《山西建筑》;20070710(第20期);111-112 * |
| 砂层掘进中盾构刀具更换技术探讨;钱新;《建筑机械》;20090109(第1期);101-103 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105221157A (en) | 2016-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102052079B (en) | Method for exchanging tool of shield machine for tunnel construction | |
| CN102493822B (en) | Method for performing curtain grouting construction on tunnel by water rich fault influence zone | |
| CN103603689B (en) | Curtain grouting construction method for treating mined-out areas | |
| CN106285715B (en) | Closely the construction method of first branch bored tunnel is worn in side to balancing earth-pressure shielding machine | |
| CN105736004A (en) | Balanced shield mud air-pressure cabin opening pressure maintaining and wall protecting construction method for shield tunneling | |
| CN103835661B (en) | A kind of local excavation pre support mine shaft rising boring technique | |
| CN106545005A (en) | A kind of reinforcing body and reinforcement means of subway tunnel shield termination | |
| CN102536253A (en) | Construction method of earth cabin back filling and cabin entering operation during earth pressure shielding | |
| CN108150219B (en) | A kind of the ground water drainage system and its construction method of separate type double-hole tunnel | |
| CN103628912A (en) | Goaf management filling grouting construction method | |
| CN105221157B (en) | WSS grouting and reinforcings assist gas pressure cutter replacing method in shield tunnel | |
| CN109322671A (en) | A method of getting out of the trapped shield tool wear | |
| CN110284885A (en) | Shield inspection-pit construction method | |
| CN102400694A (en) | Method for reinforcing joint of shield tunnel and mine tunnel | |
| CN109881696A (en) | A kind of HPPG back cover construction method | |
| CN108643929A (en) | A kind of compound stratum shield sediment improvement construction system and its construction method | |
| CN105714748A (en) | Excavating construction method for surge shaft in gravel and sandy soil layer | |
| CN109611103A (en) | A method of for boulder group consolidation process outstanding on shield section | |
| CN117703408A (en) | A construction method for continuous shield cutting through reinforced concrete ground connecting walls | |
| CN102235010B (en) | Treatment method for hanging sinking stop due to expansive soil in well sinking | |
| CN203080528U (en) | Drilling and spraying integrated foundation treating special drilling tool assembly | |
| CN108049876A (en) | A kind of construction method of compound stratum tunneling close range down bored tunnel | |
| CN106703836A (en) | Treatment method of the bedding soft soil of existing circular shield tunnel | |
| CN115573725A (en) | Stratum reinforcing method for comprehensive pipe gallery tunnel to penetrate existing subway shield | |
| CN106677161A (en) | Treatment method for soft soil foundation of existing shield rectangular tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |