CN209385135U - Shield end horizontal frozen combines reception device with short steel case - Google Patents
Shield end horizontal frozen combines reception device with short steel case Download PDFInfo
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- CN209385135U CN209385135U CN201822076157.9U CN201822076157U CN209385135U CN 209385135 U CN209385135 U CN 209385135U CN 201822076157 U CN201822076157 U CN 201822076157U CN 209385135 U CN209385135 U CN 209385135U
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Abstract
The utility model discloses shield end horizontal frozens to combine reception device with short steel case, and described device includes Horizontal Freezing unit and short steel case, and the stabilization zone that short steel case is set to Horizontal Freezing unit receives outside portal；Horizontal Freezing unit horizontally disposed freezing hole and thermometer hole in stabilization zone, and form freezing curtain；Short steel case is welded on the steel loop for receiving portal external structure wall, and the hollow structure for the open on three sides that short steel case is made of sealing cord and sealing turnover panel, wherein two sides are respectively provided with a pair of of sealing cord and sealing turnover panel.Device described in the utility model and construction method can effectively solve the problem that construction is because consolidation effect is bad under the conditions of rich aquifer sand layer, cause to take out line direction along shield outer housing and gush sand and emit water, the engineering accidents problem such as piping and surface collapse；Described device and method are suitable for the shield that down town is limited by place, vertical construction method cannot achieve and receive reinforcing engineering.
Description
Technical field
The utility model belongs to technical field of tunnel construction, is related to shield method tunnel construction shield reception technique, specially
Shield end horizontal frozen combines reception device with short steel case.
Background technique
It is the key node that engineering accident most easily occurs in the process for shield method tunnel construction that shield, which receives and originates construction,
Risk factor value is relatively high.Soil body independence is poor when digging portal, intensity not enough etc. easily causes collapsing, gushes sand emits the things such as water
Therefore.Can the consolidation process of end soil body be directly related to shield and originate and receive safely.Therefore, using reasonably reinforcing and connect
Debit's formula is the key that ensure that shield is received and originated to smoothly complete a ring.Currently, end soil body reinforcement means mainly has: high pressure
Rotary churning pile reinforcing, grouting and reinforcing, SMW engineering method stake reinforcing and engineering with artificial freezing method reinforcing etc..
Engineering with artificial freezing method has good hair because of the advantages that its intensity is high, sealing is good in shield export & import work progress
Exhibition prospect.Chemical consolidation and chemical consolidation+manual pipe jacking, which are reinforced mainly to solve portal cutting and gush sand, risks the risk of water, but works as
After shield cuts through frozen soil body, if end consolidation effect is bad, it is likely that cause to gush sand along shield outer housing pumping line direction
Mao Shui, there is an urgent need to have to prevent to gush the device and technology that sand emits water along shield pumping line direction (longitudinal direction).
Utility model content
The technical issues of solution: it for overcome the deficiencies in the prior art, solves to construct under the conditions of rich aquifer sand layer because adding
Gu effect is bad, causes to take out line direction along shield outer housing and gush sand and emit water, the engineering accidents problem such as piping and surface collapse, this reality
It is provided shield end horizontal frozen with novel and is combined reception device with short steel case.
Technical solution: shield end horizontal frozen combines reception device with short steel case, and described device includes that horizontal frozen adds
Gu unit and short steel case, the stabilization zone that short steel case is set to Horizontal Freezing unit is received outside portal；Horizontal Freezing unit
Horizontally disposed freezing hole and thermometer hole in stabilization zone, and form freezing curtain；Short steel case, which is welded in, receives portal external structure wall
Steel loop on, the hollow structure for the open on three sides that short steel case is made of sealing cord and sealing turnover panel, wherein two sides are respectively provided with
A pair of of sealing cord and sealing turnover panel.
Preferably, short steel case top surface is equipped with injected hole.
Preferably, the sealing turnover panel of short steel case is equipped with nut and connects each short steel case to form ring for steel wire penetrating
Shape, and fitted closely with the shield body of Horizontal Freezing unit, section of jurisdiction.
Preferably, the steel loop is equipped with shield tail brush.
Preferably, shield tail grease press-in hole is opened up on the structural wall.
Preferably, freezing hole number is 40-60, and outer ring arranges 20-50, and centre circle arranges 10-20, and inner ring arranges 5-
10, there is a freezing hole to be arranged in portal center in inner ring.
Preferably, the quantity of thermometer hole is 6-8, the uniformly distributed 4-6 in outer ring, between centre circle and inner ring and inner ring with
1-2 are respectively laid between portal center.
Any description above shield end horizontal frozen combines the construction method of reception device, the method packet with short steel case
Include following steps:
Step 1, the construction of Horizontal Freezing unit
At to stabilization zone portal by level angle arrange freezing hole, and within the scope of plate freezing zone in every layer of soil at least
A thermometer hole is laid, it is consistent to freeze length of tube in hole depth and region；Before shield is arrived at a station, measurement all in hole is controlled and is clicked through
Row is primary integrally, systematically control measures repetition measurement, carries out accurate, accurate compensating computation to the coordinate at all control points；Shield
Structure reception divides three phases, and respectively cutterhead not yet arrives at stabilization zone, shield enters stabilization zone, shield enters active well；
Step 2, shield tail construction
Increase by two circle extended type shield tail brushes in portal steel loop, sealing function is played, for preventing underground water, mud, note
The leakage of slurries, and shield tail grease press-in hole is opened up on structural wall；
Step 3, the construction of short steel case
Increase by a short steel case of annular on the outside of portal receiving, point four pieces of assembly are welded on portal steel loop, in short steel case
The inside and outside double-deck sealing cord of installation and sealing turnover panel, through the shield tail grease press-in hole that is arranged on structural wall into portal steel loop
Pressure injection shield tail grease between shield tail brush passes through injected hole simultaneous implantation inert slurry into short steel case in shield receive process；
Step 4, portal are cut and shield tail is appeared
Portal building enclosure is used and is manually cut；After secondary grouting etc. is strong, the wirerope on sealing turnover panel, no leakage are removed
Start to push ahead at a slow speed after slurry, sand leakage, and clear up pre-buried steel loop surrounding grout material in time, shield tail releases sealing cord 60cm
Afterwards, stop promoting, cleaning grout material is removed and scraps section of jurisdiction, starts tear open machine work.
Preferably, last time measuring system of the step 1 before shield is arrived at a station is removed in station, is set with precision survey and by adjustment
Surface traverse point and bench mark on the basis of, with the coordinate for measuring the method precise measurement survey station at second-class control point, backsight point and
Elevation, the measurement of each measurement point are no less than 4 survey time；100m carries out translocation before arrival, and 50 meter sections are before arrival
Reinforce shield attitude and rings survey, according to repetition measurement result timely correction deviation, and combines the station portal position adjustment of actual measurement
Shield cutter position when tunnel holing through；Ensure that shield machine is entered on the acceptance frame of station by designed lines from mouth is reached.Shield into
Its cutterhead plane deviation permissible value when standing: plane≤± 10mm, elevation 0-10mm；In addition, shield machine is advanced into reinforcing body cutterhead
When not yet arriving at stabilization zone, first carries out shutdown inspection and steam generator is installed, continue to promote after on probation；It is tight in progradation
Lattice control shield attitude, and fltting speed controls 1-2cm/min, guarantees the earth pressure balance inside shield machine, guarantee shield drive end unit
Gap between section of jurisdiction is uniform, prevents in shield machine turning progradation, pipe sheet assembling dislocation；The propulsion phase should also be paid close attention to
The pressure of shield tail grease is to prevent shield tail spillage；When shield machine is advanced into consolidation by freezing body fltting speed control 1cm/min simultaneously
Dregs temperature is observed at any time, the temperature of dregs is discharged lower than 0 DEG C, should open steam generator at once prevents cutterhead from being embraced by frozen soil
Extremely；In segment assembly, shield machine should be converted to propulsion mode, and after cutter head of shield machine releases Frozen Body, shield tail enters reinforcing body,
Simultaneous grouting slurry is changed to cement mortar；After shield drive end unit is detached from portal steel loop, stop synchronous grouting；Shield cutter driving
When to apart from diaphram wall 0.3-0.5m, driving speed control tunnels pressure control in 0.3MPa, torque is protected in 5mm/min
It holds 7 × 103-104KNm, cutterhead revolving speed are 0.9rpm, and notch hydraulic pressure is 0, are entered by shield jacking force, active well mud refers to
Mark control increases cutterhead revolving speed in 1.2-1.25, reduces pile penetration, slowly grinds；After cutterhead enters sealing cabinet, stop cutterhead
Rotation, is slowly advanced, and control per minute is in 5mm-10mm, until entire cutterhead passes through short steel case；Last five rings is section of jurisdiction inner arc
The pre-buried junction steel plate Special Ring in face increases section of jurisdiction and reserves injected hole, and using every hole slip casting, remaining is used as inspection hole, assembled
It completes, needs to carry out welding tension immediately after releasing shield tail.
Preferably, cut diaphram wall in two stages: the first stage cuts side wall armored concrete to reinforcing steel bars exposed,
Portal temporary sealing is installed, anhydrous in inspecting hole or silt flows out, freezing carries out second stage after reaching design requirement, and examines
It looks into determining no-reinforcing-bar and invades limit；Portal abolishes sequence from top to bottom, is carried out from both sides to centre.
The utility model has the advantages that (1) shield end horizontal frozen described in the utility model is combined reception device with short steel case and can be had
Construction is because consolidation effect is bad under the conditions of effect solves rich aquifer sand layer, causes to take out line direction along shield outer housing and gushes sand and emit water, manages
It gushes and the engineering accidents problems such as surface collapse；(2) described device be suitable for down town limited by place, vertical construction method without
The shield that method is realized receives reinforcing engineering.
Detailed description of the invention
Fig. 1 is freezing hole and thermometer hole arrangement schematic diagram；
Fig. 2 is that end reinforces sectional view；
Fig. 3 is short steel case and portal steel loop internal component diagrammatic cross-section；
Fig. 4 is the short steel case floor map of annular；
Wherein, 1- freezing hole, 2- thermometer hole, 3- freezing curtain, 4- shield tail brush, 5- sealing cord, 6- sealing turnover panel, 7- are short
Steel case, 8- steel loop, 9- injected hole, 10- shield tail grease press-in hole, 11- nut, 12- structural wall, 13- wirerope.
Specific embodiment
Following embodiment further illustrates the content of the utility model, but should not be construed as a limitation of the present invention.
Without departing substantially from the spirit of the present invention and essence, to made by the utility model method, step or condition modification and
Replacement, belongs to the scope of the utility model.Unless otherwise specified, technological means used in embodiment is those skilled in the art
Conventional means known to member.
Embodiment 1
Changzhou rail traffic Line 1 universal love way station~Changzhou railway station downlink shield receives end, and underground is big at the train station
Below the Room, being limited by surface condition can not be using the direct reinforcing mode in ground, therefore selects horizontal freezing reinforcing mode.The work
In journey receive process, slowly, station heave is big for temperature decline.(design freezes number of days 30 days) freezes when freezing to last 58 days
Wall thickness still meet design requirements completely, and maximum protuberance value has reached 41.48mm.It may cause station bottom under frost-heave force effect
Plate cracking；If freezing efficiency is bad, easily gush sand emits the engineering accidents such as water to excavation by force.It is therefore proposed that following technical scheme:
As shown in Figs 1-4, shield end horizontal frozen combines reception device with short steel case, and described device includes horizontal frozen
Reinforcement elements and short steel case 7, the stabilization zone that short steel case 7 is set to Horizontal Freezing unit receive outside portal；Horizontal Freezing
Unit horizontally disposed freezing hole 1 and thermometer hole 2 in stabilization zone, and form freezing curtain 3；Short steel case 7 is welded in reception portal
On the steel loop 8 of external structure wall 12, the hollow structure for the open on three sides that short steel case 7 is made of sealing cord 5 and sealing turnover panel 6,
Wherein two sides are respectively provided with a pair of of sealing cord 5 and sealing turnover panel 6.
Short 7 top surface of steel case is equipped with injected hole 9.
The sealing turnover panel 6 of short steel case 7 is equipped with nut 11, passes through for wirerope 13, and each short series connection of steel case 7 is formed ring
Shape, and fitted closely with the shield body of Horizontal Freezing unit, section of jurisdiction.
The steel loop 8 is equipped with shield tail brush 4.
Shield tail grease press-in hole 10 is opened up on the structural wall 12.
As shown in Figure 1, end well shield starting arrangement horizontal frozen hole is 57.Shield receives freezing hole and presses level angle
Arrangement arranges that 3 circle freezing holes and portal hit exactly 1 freezing hole altogether.The circumferential edge of outer ring freezing hole diametrically 8m averagely arranges 32
A hole, aperture spacing are 0.784m, depth 13.8m.The circumferential edge of centre circle freezing hole diametrically 5.4m averagely arranges 16 jellies
Hole is tied, aperture spacing is 1.053m, depth 2.8m.The circumferential edge of inner ring freezing hole diametrically 2.7m averagely arranges 8 holes, opens
Pitch of holes is 1.033m, depth 2.8m.1 freezing hole, depth 2.8m is arranged in portal center.Freezing hole totally 57, always
Length is 511.6m.8 thermometer holes are arranged altogether in frozen region.
As shown in Figure 2, it is contemplated that the special circumstances of shield receiving area soil property and the position and structure of above ground structure receive
End portal center frozen soil plate effective thickness is designed as 2.5m, and the outer freezing curtain Design of length of portal circle is 12.8m, outer ring frozen soil
Curtain effective thickness is designed as 1.6m, and shield tail rear forms effective water proof environment before not puncturing reinforcing body so as to cutterhead.Freeze
Curtain mean temperature design requirement is≤- 10 DEG C, and section of jurisdiction and frozen soil interface mean temperature design requirement are≤- 5 DEG C, design product
It is 30 days that number of days is freezed in pole.
The shield end horizontal frozen combines the construction method of reception device with short steel case, and the method includes following steps
It is rapid:
Step 1, the construction of Horizontal Freezing unit
At to stabilization zone portal by level angle arrange freezing hole 1, and within the scope of plate freezing zone in every layer of soil extremely
A thermometer hole 2 is laid less, and it is consistent to freeze length of tube in hole depth and region；Before shield is arrived at a station, measurement all in hole is controlled
Point carries out once integrally, systematically controlling measurement repetition measurement, carries out accurate, accurate adjustment meter to the coordinate at all control points
It calculates；Shield reception divides three phases, and respectively cutterhead not yet arrives at stabilization zone, shield enters stabilization zone, shield enters active well；
Step 2, shield tail construction
In portal steel loop 8 increase by two circle extended type shield tail brushes 4, play sealing function, for prevent underground water, mud,
The leakage of injection slurry, and shield tail grease press-in hole 10 is opened up on structural wall 12；
Step 3, the construction of short steel case 7
Increase by a short steel case 7 of annular on the outside of portal receiving, point four pieces of assembly are welded on portal steel loop 8, short steel case
The inside and outside double-deck sealing cord 5 of installation and sealing turnover panel 6 in 7, by the shield tail grease press-in hole 10 that is arranged on structural wall 12 to
Pressure injection shield tail grease between shield tail brush 4 in portal steel loop 8, it is synchronous into short steel case 7 by injected hole 9 in shield receive process
Inject inert slurry；
Step 4, portal are cut and shield tail is appeared
Portal building enclosure is used and is manually cut；After secondary grouting etc. is strong, the wirerope 13 on sealing turnover panel 6, nothing are removed
Start to push ahead at a slow speed after spillage, sand leakage, and clear up pre-buried 8 surrounding grout material of steel loop in time, shield tail releases sealing cord 5
After 60cm, stop promoting, cleaning grout material is removed and scraps section of jurisdiction, starts tear open machine work.
Last time measuring system of the above step 1 before shield is arrived at a station is removed in station, is set with accurate survey and by adjustment
On the basis of surface traverse point and bench mark, with the method precise measurement survey station at the second-class control point of measurement, the coordinate and height of backsight point
Journey, the measurement of each measurement point are no less than 4 survey time；100m carries out translocation before arrival, and 50 meter sections add before arrival
Strong shield attitude and rings survey according to repetition measurement result timely correction deviation, and combine the station portal position of actual measurement to adjust tunnel
Shield cutter position when road penetrates through；Ensure that shield machine is entered on the acceptance frame of station by designed lines from mouth is reached.Shield enters the station
When its cutterhead plane deviation permissible value: plane≤± 10mm, elevation 0-10mm；In addition, shield machine is advanced into reinforcing body cutterhead still
When not arriving at stabilization zone, first carries out shutdown inspection and steam generator is installed, continue to promote after on probation；It is stringent in progradation
Control shield attitude, fltting speed control 1-2cm/min, guarantee shield machine inside earth pressure balance, guarantee shield drive end unit with
Gap between section of jurisdiction is uniform, prevents in shield machine turning progradation, pipe sheet assembling dislocation；The propulsion phase should also pay close attention to shield
The pressure of tail grease is to prevent shield tail spillage；When shield machine is advanced into consolidation by freezing body fltting speed control 1cm/min and with
When observe dregs temperature, the temperature of dregs is discharged lower than 0 DEG C, should open steam generator at once prevents cutterhead from being embraced by frozen soil
Extremely；In segment assembly, shield machine should be converted to propulsion mode, and after cutter head of shield machine releases Frozen Body, shield tail enters reinforcing body,
Simultaneous grouting slurry is changed to cement mortar；After shield drive end unit is detached from portal steel loop 8, stop synchronous grouting；Shield cutter pick
When proceeding to apart from diaphram wall 0.3-0.5m, driving speed control tunnels pressure control in 0.3MPa, torque in 5mm/min
It is maintained at 7 × 103-104KNm, cutterhead revolving speed are 0.9rpm, and notch hydraulic pressure is 0, are entered by shield jacking force, active well mud
Norm controlling increases cutterhead revolving speed in 1.2-1.25, reduces pile penetration, slowly grinds；After cutterhead enters sealing cabinet, stop knife
Disk rotation, is slowly advanced, and control per minute is in 5mm-10mm, until entire cutterhead passes through short steel case 7；Last five rings is in section of jurisdiction
The pre-buried junction steel plate Special Ring of cambered surface increases section of jurisdiction and reserves injected hole, and using every hole slip casting, remaining is used as inspection hole, is spelled
It installs into, needs to carry out welding tension immediately after releasing shield tail.
As shown in figure 4, increase by a short steel case of annular on the outside of portal receiving, point four pieces of assembly, be welded in portal steel loop it
On；Chemical grout (WSS) can be injected when occurring leakage and sand boil in shield receive process, quickly solidify leak stopping.Portal building enclosure
Using manually cutting, in order to guarantee the stabilization of building enclosure, cut diaphram wall in two stages: the first stage is by side wall reinforcing bar
Concrete chisel removal is to reinforcing steel bars exposed, and portal temporary sealing is installed, anhydrous in inspecting hole or silt flows out, freezing reaches design and wants
Second stage is carried out after asking, and checks that determining no-reinforcing-bar invades limit；Portal abolishes sequence from top to bottom, is carried out from both sides to centre.
If portal teardown phase reinforcing body consolidation effect is undesirable, under Water And Earth Pressures effect, Sand phenomenon easily occurs, answers
Starting emergency precipitation and the outer soil body of knee wall at once, as early as possible to progress grouting and reinforcing at leak sand leakage.
Claims (7)
1. shield end horizontal frozen combines reception device with short steel case, which is characterized in that described device includes that horizontal frozen adds
Gu unit and short steel case (7), the stabilization zone that short steel case (7) is set to Horizontal Freezing unit is received outside portal；Horizontal frozen adds
Gu unit horizontally disposed freezing hole (1) and thermometer hole (2) in stabilization zone, and form freezing curtain (3)；Short steel case (7) welding
In on the steel loop (8) for receiving portal external structure wall (12), short steel case (7) is made of sealing cord (5) and sealing turnover panel (6)
The hollow structure of open on three sides, wherein two sides are respectively provided with a pair of of sealing cord (5) and sealing turnover panel (6).
2. shield end horizontal frozen according to claim 1 combines reception device with short steel case, which is characterized in that short steel
Case (7) top surface is equipped with injected hole (9).
3. shield end horizontal frozen according to claim 1 combines reception device with short steel case, which is characterized in that short steel
The sealing turnover panel (6) of case (7) is equipped with nut (11), passes through for wirerope (13), and each short steel case (7) series connection is formed ring-type,
And it is fitted closely with the shield body of Horizontal Freezing unit, section of jurisdiction.
4. shield end horizontal frozen according to claim 1 combines reception device with short steel case, which is characterized in that described
Steel loop (8) is equipped with shield tail brush (4).
5. shield end horizontal frozen according to claim 1 combines reception device with short steel case, which is characterized in that described
Shield tail grease press-in hole (10) is opened up on structural wall (12).
6. shield end horizontal frozen according to claim 1 combines reception device with short steel case, which is characterized in that freeze
Hole (1) quantity is 40-60, and outer ring arranges 20-50, and centre circle arranges 10-20, and inner ring arranges 5-10, there is one in inner ring
A freezing hole (1) is arranged in portal center.
7. shield end horizontal frozen according to claim 1 combines reception device with short steel case, which is characterized in that thermometric
The quantity in hole (2) is 6-8, the uniformly distributed 4-6 in outer ring, each cloth between centre circle and inner ring and between inner ring and portal center
If 1-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822076157.9U CN209385135U (en) | 2018-12-11 | 2018-12-11 | Shield end horizontal frozen combines reception device with short steel case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822076157.9U CN209385135U (en) | 2018-12-11 | 2018-12-11 | Shield end horizontal frozen combines reception device with short steel case |
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| Publication Number | Publication Date |
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| CN209385135U true CN209385135U (en) | 2019-09-13 |
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ID=67871460
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822076157.9U Active CN209385135U (en) | 2018-12-11 | 2018-12-11 | Shield end horizontal frozen combines reception device with short steel case |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403987A (en) * | 2018-12-11 | 2019-03-01 | 南京林业大学 | Shield end horizontal frozen combines reception device and construction method with short steel case |
| CN111608680A (en) * | 2020-04-27 | 2020-09-01 | 上海隧道工程有限公司 | Sealing and water stopping method for rectangular pipe-jacking starting tunnel portal |
-
2018
- 2018-12-11 CN CN201822076157.9U patent/CN209385135U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403987A (en) * | 2018-12-11 | 2019-03-01 | 南京林业大学 | Shield end horizontal frozen combines reception device and construction method with short steel case |
| CN109403987B (en) * | 2018-12-11 | 2023-10-20 | 南京林业大学 | Shield end horizontal freezing and short steel box combined receiving device and construction method |
| CN111608680A (en) * | 2020-04-27 | 2020-09-01 | 上海隧道工程有限公司 | Sealing and water stopping method for rectangular pipe-jacking starting tunnel portal |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: JIANGSU JIANKE ENGINEERING CONSULTING Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020320000080 Denomination of utility model: Combined receiving device of shield end horizontal freezing and short steel box Granted publication date: 20190913 License type: Common License Record date: 20200925 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: HUADONG CONSTRUCTION CO., LTD. OF CHINA RAILWAY NO.3 ENGINEERING GROUP Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020320000089 Denomination of utility model: Combined receiving device of shield end horizontal freezing and short steel box Granted publication date: 20190913 License type: Common License Record date: 20201012 |