CN205677624U - Shield docks semi-circular shape consolidation by freezing structure - Google Patents
Shield docks semi-circular shape consolidation by freezing structure Download PDFInfo
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- CN205677624U CN205677624U CN201620639984.2U CN201620639984U CN205677624U CN 205677624 U CN205677624 U CN 205677624U CN 201620639984 U CN201620639984 U CN 201620639984U CN 205677624 U CN205677624 U CN 205677624U
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- shield
- circular shape
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- freezing
- docking
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Abstract
The utility model discloses a kind of shield docking semi-circular shape consolidation by freezing structure, including two shield machines of docking, it is evenly arranged many semi-circular shape freezing pipes along shield casing circumference in one side docking shield machine, semi-circular shape layout of freezing pipes principle is 0.8 1.2m for ensureing the perforate arc length of semi-circular shape freezing pipe, it is passed through liquid nitrogen freezing in semi-circular shape freezing pipe, in ground plane, form hemispherical Frozen Soil Cylinder.The utility model is laid compared with the ruggedized construction that mode is formed with traditional shield docking linear pattern freezing pipe, ruggedized construction stress is more reasonable, freezing pipe materials greatly reduce, freezing chilling requirement also to greatly reduce, frozen swell and melt settlement amount is also very little, and duration of freezing is short, instant effect, while ensureing consolidation effect particularly stagnant water effect, it is greatly saved the energy, thus has preferable economic benefit, there is bigger application value.
Description
Technical field
The utility model relates to a kind of shield docking semi-circular shape consolidation by freezing structure.
Background technology
Shield method is built tunneling technique and is applied more and more in China's underground engineering construction, most more river tunnels over strait
Road and track traffic infrastructure all use the method.At present, shield tunnel has to becoming that super-large diameter, extra long distance develop
Gesture, and advance distance of shield is long, necessarily brings the problems such as tail sealing, tool wear, long-distance transportation.In order to
Solve these problems, typically increase relaying active well in midway.Do so will increase cost, and tunnel over strait comes for more river
Saying, if increasing active well on sea, midway, necessarily environment being affected.Shield docking technique has not by ground
Building limits, unrestricted choice on earth point, on surrounding enviroment impact the advantage such as little, can preferably solve shield extra long distance and execute
Work problem, is with a wide range of applications.
Shield docking is that two shield machines tunnel from both sides in opposite directions to combining place, carries out docking to complete whole piece in ground
The shield-tunneling construction in tunnel, has the advantages such as security, economy, time-saving and efficiency.Shield docking mode mainly has building formula to dock
Dock two kinds with mechanical type.Building formula rendezvous method is by making consolidation process to earth point stratum, and reach sealing and pre-defense sector
After the effect of layer unstability, complete shield and dismantle and carry out tunnel-liner；Mechanical type rendezvous method is by carrying out special setting to shield
Meter, and make the method that two shield structures directly dock.Comparing mechanical type rendezvous method, building formula rendezvous method is with its economy more
Conventional.
The stratum consolidation of building formula rendezvous method processes and can carry out from ground before arrival is to earth point, if ground is without reality
Execute condition or edpth of tunnel too deep from ground implement reinforce uneconomical, consolidation effect cannot be ensured when, then can take from shield tunnel
Road is internal uses slip casting auxiliary law to carry out consolidation process.Carry out stratum consolidation from ground and be similar to conventional foundation treatment technology, close
Key is according to the suitable reinforcement means of the suitable reinforcing scope of engineering geological condition and shield size design and selection；Reinforcement means
Have the methods such as high-pressure rotary-spray, Soil-cement, chemical grouting.And the method reinforced from tunnel internal has chemical grouting method and freezes
Method.
Freezing process in shield docking is to install frigo in side or bilateral shield to freeze so that shield is docked
Place's Freezing stratum as rapid forms closing, high-strength Frozen Soil Cylinder, stops underground water to enter mating operation face, opposing external water soil pressure,
Existing intensity is provided to have again the temporary support structures of water shutoff to shield mating operation.
The laying mode of freezing pipe has three kinds:
One is to set radial linear pattern freezing pipe from unilateral shield to combine other side shield inner surface attaching freezing pipe.
Attach freezing pipe for overcoming radial freezing pipe to combine can ensure to be formed continuously apart from shield deficiency farther out, two kinds of freezing pipes
The Frozen Soil Cylinder closed.
Two is to set single radial linear pattern freezing pipe frozen ground respectively from both sides shield to carry out shield docking.
Three is to set double radial linear pattern freezing pipe frozen ground respectively from both sides shield to carry out shield docking.
Above-mentioned three kinds of freezing pipes are laid mode and are all also existed and squeeze into that freezing soil pipe is too much, frozen construction is loaded down with trivial details, freeze to need
How the shortcoming that cold freezing process power consumption big, whole is big, frozen swell and melt settlement amount is big, find a kind of energy-efficient shield to dock
Consolidation by freezing mode is key issue urgently to be resolved hurrily at present.
Chinese patent application 201110321819.4 discloses a kind of shield and to ground plane bend pipe one side freezing process and freezes
Knot pipe sets device, and this freezing process uses bending freezing pipe to realize only to dispose freezing system in unilateral tunnel, its principle be from
The unilateral shield of docking gets bending freezing pipe so that it is end is close to offside shield housing, and from unilateral tunnel, refrigeration freezes rear shape
Cyclization, around shield docking site surrounding, the Frozen Soil Cylinder with absolute water shutoff and good strength, completes shield under its protection
Structure butt-joint operation.Its freezing pipe sets device: on shield machine housing install orifice tube, and by ball valve connect linear or
Shaped form seals pipe, has water shutoff blowout prevention function.Linear is selected to seal pipe during drilling rod perforate operation, when setting bending freezing pipe
Shaped form is selected to seal pipe.But this patent application also exists following technical deficiency:
1st, to set device excessively loaded down with trivial details for freezing pipe, causes construction quality wayward；And it is difficult to carry out semi-circular shape to freeze
Setting of knot pipe；
2nd, using salt solution cooling system, freezing system disposes time-consuming, occupation of land；And form the time of final Frozen Soil Cylinder relatively
Long, affect the duration；
3rd, owing to freezing pipe sets the restriction of device, the Frozen Soil Cylinder opposing of the cincture shield docking site surrounding being formed
The intensity of surrounding Water And Earth Pressures is difficult to ensure, is susceptible to intensity deficiency and results in penetrating passage, and then jeopardizes shield docking
The safety of construction；
4th, owing to using salt solution cooling system, the soil body being easily caused between bending freezing pipe and docking site shield shell does not has
Freeze reality completely, ultimately form the housing Frozen Soil Cylinder of bending, this Frozen Soil Cylinder with freeze compared with real hemispherical Frozen Soil Cylinder, safety
Property is substantially reduced.
Utility model content
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, providing a kind of shield docking semi-circular shape to freeze
Knot ruggedized construction, this structure stress is reasonable, and duration of freezing is short, instant effect, it is only necessary to construction in unilateral tunnel.
For achieving the above object, the utility model employing following technical proposals:
A kind of shield docking semi-circular shape consolidation by freezing structure, including two shield machines of docking, docks shield in one side
Being evenly arranged many semi-circular shape freezing pipes along shield casing circumference in machine, semi-circular shape layout of freezing pipes principle is for ensureing half
The perforate arc length of annular freezing pipe is 0.8-1.2m, is passed through liquid nitrogen freezing in semi-circular shape freezing pipe, to ground connection
Form hemispherical Frozen Soil Cylinder in Ceng.
A diameter of 32mm or 60mm of described semi-circular shape freezing pipe.
Described semi-circular shape freezing pipe position of opening distance docking shield machine outer casing end 2m, forms radius big in the soil body
Hemispherical Frozen Soil Cylinder in 2m.
Described semi-circular shape freezing pipe material is seamless low carbon steel pipe or PVC, PPR, ABS, PE plastic tube.
Described shield machine includes shield shell and be located therein cutterhead and base bearing, base bearing by high-strength bolt respectively with shield
Shell is connected with cutterhead.
Described shield shell includes precursor, middle body and the shield tail being connected by high-strength bolt, wherein, in precursor and middle body all use
Outer double-deck shield shell.
The outer layer shield shell of two shield machines of docking directly welds waterproof steel plate ring as the supporting tearing machine in hole open.
Two shield machines of docking include leading shield machine and rear row shield machine.
The Butt Section of two shield machines of docking uses reinforced concrete segment or steel pipe sheet lining cutting.
It is provided with some temperature tubes in hemispherical Frozen Soil Cylinder, temperature tube is provided with thermo detector, thermo detector and outside
Display device connects, a diameter of 45mm of temperature tube.
Semi-circular shape freezing pipe is connected with the liquid nitrogen storage tank in the tank car being parked in outside tunnel starting well by pipeline, semicircular ring
Being additionally provided with the discharge collecting vaporization nitrogen in shape freezing pipe, the blast pipe through communicating therewith for the discharge extends to tunnel outer space
Spacious place.
The utility model is laid compared with the ruggedized construction that mode is formed with traditional shield docking linear pattern freezing pipe, reinforces
Structure stress is more reasonable, and freezing pipe materials greatly reduce, and freezes chilling requirement and also greatly reduces, and frozen swell and melt settlement amount is also very little, freezes
Clone system is easy for installation, it is few to take up an area, and duration of freezing is short, instant effect, while ensureing consolidation effect particularly stagnant water effect, greatly
Save greatly the energy, thus had preferable economic benefit, there is bigger application value.
Brief description
Fig. 1 is the utility model structural representation；
Fig. 2 is the utility model construction procedure figure；
Wherein, 1. semi-circular shape freezing pipe, 2. hemispherical Frozen Soil Cylinder, 3. docks shield machine, 4. lining segment, 5. shield
Tail grouting soil.
Detailed description of the invention
With embodiment, the utility model is further illustrated below in conjunction with the accompanying drawings.
Structure depicted in this specification institute accompanying drawings, ratio, size etc., all only in order to coordinate disclosed in specification in
Hold, understand for those skilled in the art and read, being not limited to the enforceable qualifications of the utility model, therefore not
Have technical essential meaning, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting this practicality newly
Under effect that type can be generated by and the purpose that can reach, all should still fall and obtain can contain at the technology contents disclosed in the utility model
In the range of lid.Meanwhile, in this specification cited as " on ", D score, "left", "right", the term of " middle " and " " etc.,
It is merely convenient to understanding of narration, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or tune
Whole, without under essence change technology contents, when being also considered as the enforceable category of the utility model.
As it is shown in figure 1, stratum consolidation structure during shield docking, along shield casing circumference in one side docking shield machine 3
Being evenly arranged many semi-circular shape freezing pipes 1, semi-circular shape freezing pipe 1 arrangement principle is for ensureing semi-circular shape freezing pipe 1 perforate
Spacing is 0.8-1.2m(arc length), by implementing liquid nitrogen freezing in semi-circular shape freezing pipe 1, finally rapidly to ground plane
Middle formation hemispherical freezing curtain 2, under the protection of hemispherical freezing curtain 2, smoothly completes shield docking construction.Such as Fig. 1 institute
Show.Semi-circular shape freezing pipe 1 diameter is generally 32 or 60mm；Outside semi-circular shape freezing pipe 1 position of opening distance docking shield machine
Shell end 2m, should ensure that and form the hemispherical Frozen Soil Cylinder 2 more than 2m for the radius in the soil body；Freezing pipe material is usually seamless low
Carbon steel pipe, it would however also be possible to employ the plastic tubes such as PVC, PPR, ABS, PE.
During shield docking, semi-circular shape consolidation by freezing structure docks linear pattern freezing pipe laying mode shape with traditional shield
The ruggedized construction becoming is compared, and ruggedized construction stress is more reasonable, and freezing pipe materials greatly reduce, and freezes chilling requirement and also significantly subtracts
Few, frozen swell and melt settlement amount is also very little, and duration of freezing is short, instant effect, while ensureing consolidation effect particularly stagnant water effect, significantly
Save the energy, thus had preferable economic benefit, there is bigger application value.
Shield docking construction procedure is as shown in Figure 2.
(1) shield machine is docked
1) shield shell
Shield urogenesis grouting at the tail of the shield machine induration 5, in addition to shield tail (general shield tail is refused to remove), precursor and middle body all use double
Layer shield shell.During dismounting, outer layer shield shell stays in the earth formation, after other parts are removed, welds between the outer layer shield shell that two shield structures stay
Connect waterproof steel plate ring as the supporting tearing machine in hole open.Under complete steel plate ring protection, each parts of shield can be carried out safely and tear open
Unload.
2) cutterhead, precursor, middle body
Cutterhead, precursor, middle body use the block design mode being readily disassembled, according to tunnel internal diameter size, after control dismounting
Piece weight can suitably be divided into 3-6 block, high-strength bolt can be taked between each piece to connect, in order to dismounting with again assembled.
3) base bearing
Base bearing is the vitals of shield, typically each uses high-strength bolt to be connected with shield shell and cutterhead, and ratio is easier to
In dismounting, should suitably control the structure size of base bearing, be beneficial to dismounting.
(2) shield is relative to the detection of position
For accurately grasping the relative position of docking shield in advance, it is ensured that final merging precision, following method need to be taked to shield
The relative position of structure detects.
1) the actual measurement elevation using two shield structures carries out relative position control with coordinate
In shield manufacture process, in shield, 8-1 shield attitude measurement point generally individually on body steel construction, can be distributed, and
The relative coordinate with shield center line and cutter head center for each measurement point is provided, each by the wire and bench mark measurement laid in tunnel
The coordinate of point and elevation, then can calculate shield centre coordinate and elevation, shield vertically and the data such as level inclination.With
On the basis of the position of leading shield and attitude, the tunneling direction of rear row shield is controlled with attitude.General in rear row shield
With leading shield at a distance of the 200th, the 100th, the 50th, 30m when, should measure, calculate coordinate and the attitude of a shield respectively, main before 30m
Want travel direction to adjust, after 30m, be substantially carried out pose adjustment.
The merging precision that the coordinate being measured respectively by two shield structures and elevation determine, is affected bigger by measure error.At shield
In structure butt joint project, when length of tunnel computation and measurement deviation accumulation value is more than when allowing docking deviation, it is impossible to individually use we
Method, it is necessary to boring direct detection shield is relative to position.
2) it is drilled with row shield position after exploration hole directly measures
Leading arrival precalculated position and complete section components dismounting after, in rear row shield apart from leading shield about 50m
When, in leading shield, row shield is drilled with exploration hole backward, installs measurement pipe, utilizes magnetic detector system and γ line detection system
Directly measuring rear row shield position, tunneling direction is controlled with attitude by rear row shield according to measurement result, revises
Carry out one-shot measurement again after driving 20m, then tunneling direction is adjusted with attitude, continues to revise and tunnel to docking mileage.
(3) shield docking construction is it should be noted that item
1) loosen for section of jurisdiction after preventing shield docking from disintegrating, last 20 endless tube pieces should be carried out longitudinally connecting before shield is disintegrated
Connect.After leading arrival anticipated docking mileage, for preventing shield from retreating, it is necessary to shield shell is firmly supported on last endless tube
On piece.
2) for ease of the position sensing to rear row shield for the leading shield, leading shield need to remove section components, these parts
Generally comprise duct piece installation machine, base bearing, middle body etc..
3) Butt Section has mostly used reinforced concrete segment or steel pipe sheet to carry out lining cutting 4, it is necessary to carry out section of jurisdiction waterproof and
Connection with segment assembly.
(4) installation of semi-circular shape freezing pipe
1) Frozen wall thickness design
Freezing curtain thickness is designed by incorporation engineering feature, soil layer condition and job site situation.Semi-circular shape is frozen
Knot pipe position of opening distance docking shield machine outer casing end 2m, should ensure that and form the hemispherical frozen soil more than 2m for the radius in the soil body
Curtain.
2) arrangement of freezing hole
It is evenly arranged many semi-circular shape freezing pipes 1, semicircular ring along shield casing circumference in one side docking shield machine 3
Shape pipe arrangement principle is for ensureing that freezing pipe perforate spacing is 0.8-1.2m(arc length).Semi-circular shape freezing pipe 1 diameter is generally 32
Or 60mm.Freezing pipe material is usually seamless low carbon steel pipe, it would however also be possible to employ the plastic tubes such as PVC, PPR, ABS, PE.
3) thermometer hole is arranged
Purpose is mainly the temperature development situation measuring freezing curtain scope different parts, in order to take to control accordingly to arrange
Execute, it is ensured that the safety of construction.Temperature tube diameter is generally 45mm.
(5) liquid nitrogen freezing
It is parked in liquid nitrogen storage tank and tank car outside tunnel starting well, utilize pipeline that liquid nitrogen is delivered to shield joint and freeze work
Making in the freezing pipe in face, through cyclic absorption Formation heat, collecting vaporization nitrogen by discharge, recycling blast pipe is drained into
Outside tunnel spacious at, this kind of method has that freezing system is simple, temperature is low, freezing speed is fast compared with brine freezing, good stability, freezes
Soil intensity advantages of higher, and consolidation by freezing soil body flexible form, depending on the scale of freezing can be according to engineering practice.
Although detailed description of the invention of the present utility model is described by the above-mentioned accompanying drawing that combines, but not new to this practicality
The restriction of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Field technique personnel do not need to pay the various modification that creative work can make or deformation still at protection model of the present utility model
Within enclosing.
Claims (10)
1. a shield docking semi-circular shape consolidation by freezing structure, is characterized in that, including two shield machines of docking, right in one side
Being evenly arranged many semi-circular shape freezing pipes along shield casing circumference in connecing shield machine, semi-circular shape layout of freezing pipes principle is
The perforate arc length of guarantee semi-circular shape freezing pipe is 0.8-1.2m, is passed through liquid nitrogen freezing in semi-circular shape freezing pipe,
To formation hemispherical Frozen Soil Cylinder in ground plane.
2. shield docking semi-circular shape consolidation by freezing structure as claimed in claim 1, is characterized in that, described semi-circular shape is freezed
Manage a diameter of 32mm or 60mm.
3. shield docking semi-circular shape consolidation by freezing structure as claimed in claim 1, is characterized in that, described semi-circular shape is freezed
Pipe position of opening distance docking shield machine outer casing end 2m, forms the hemispherical Frozen Soil Cylinder more than 2m for the radius in the soil body.
4. shield docking semi-circular shape consolidation by freezing structure as claimed in claim 1, is characterized in that, described semi-circular shape is freezed
Tubing matter is seamless low carbon steel pipe, PVC, PPR, ABS or PE plastic tube.
5. shield docking semi-circular shape consolidation by freezing structure as claimed in claim 1, is characterized in that, described shield machine includes shield
Shell and be located therein cutterhead and base bearing, base bearing is connected with shield shell and cutterhead respectively by high-strength bolt.
6. shield docking semi-circular shape consolidation by freezing structure as claimed in claim 5, is characterized in that, described shield shell includes passing through
Precursor, middle body and the shield tail that high-strength bolt connects, wherein, precursor and middle body all use inside and outside double-deck shield shell.
7. shield docking semi-circular shape consolidation by freezing structure as claimed in claim 6, is characterized in that, two shield machines of docking
Outer layer shield shell directly weld waterproof steel plate ring as the supporting tearing machine in hole open.
8. shield docking semi-circular shape consolidation by freezing structure as claimed in claim 1, is characterized in that, two shield machines of docking
Butt Section use reinforced concrete segment or steel pipe sheet lining cutting.
9. shield docking semi-circular shape consolidation by freezing structure as claimed in claim 1, is characterized in that, at hemispherical Frozen Soil Cylinder
In be provided with some temperature tubes, temperature tube is provided with thermo detector, thermo detector is connected with exterior display device, and temperature tube is a diameter of
45mm。
10. shield docking semi-circular shape consolidation by freezing structure as claimed in claim 1, is characterized in that, semi-circular shape freezing pipe
Connected with the liquid nitrogen storage tank in the tank car being parked in outside tunnel starting well by pipeline, semi-circular shape freezing pipe is additionally provided with collection
The discharge of vaporization nitrogen, the blast pipe through communicating therewith for the discharge extends at spacious outside tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620639984.2U CN205677624U (en) | 2016-06-27 | 2016-06-27 | Shield docks semi-circular shape consolidation by freezing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620639984.2U CN205677624U (en) | 2016-06-27 | 2016-06-27 | Shield docks semi-circular shape consolidation by freezing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205677624U true CN205677624U (en) | 2016-11-09 |
Family
ID=57429704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620639984.2U Expired - Fee Related CN205677624U (en) | 2016-06-27 | 2016-06-27 | Shield docks semi-circular shape consolidation by freezing structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN205677624U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113310849A (en) * | 2021-05-13 | 2021-08-27 | 华侨大学 | Grouting reinforcement test device and method for simulating shield underground butt joint |
| CN113775342A (en) * | 2021-09-23 | 2021-12-10 | 海南大学 | Shield butt-joint freezing and reinforcing method and device |
| CN114060038A (en) * | 2021-10-29 | 2022-02-18 | 五邑大学 | Freezing reinforcement device and shield butt joint reinforcement method thereof |
| CN114922635A (en) * | 2022-05-27 | 2022-08-19 | 中建交通建设集团有限公司 | Parallel freezing system for shield underground butt joint and abandoned shell disassembly and construction method |
-
2016
- 2016-06-27 CN CN201620639984.2U patent/CN205677624U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113310849A (en) * | 2021-05-13 | 2021-08-27 | 华侨大学 | Grouting reinforcement test device and method for simulating shield underground butt joint |
| CN113775342A (en) * | 2021-09-23 | 2021-12-10 | 海南大学 | Shield butt-joint freezing and reinforcing method and device |
| CN114060038A (en) * | 2021-10-29 | 2022-02-18 | 五邑大学 | Freezing reinforcement device and shield butt joint reinforcement method thereof |
| CN114060038B (en) * | 2021-10-29 | 2024-02-13 | 五邑大学 | Freezing reinforcement device and shield butt joint reinforcement method thereof |
| CN114922635A (en) * | 2022-05-27 | 2022-08-19 | 中建交通建设集团有限公司 | Parallel freezing system for shield underground butt joint and abandoned shell disassembly and construction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20180627 |