CN208982049U - A kind of shield machine to drift about for controlling shield attitude - Google Patents
A kind of shield machine to drift about for controlling shield attitude Download PDFInfo
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- CN208982049U CN208982049U CN201821711338.8U CN201821711338U CN208982049U CN 208982049 U CN208982049 U CN 208982049U CN 201821711338 U CN201821711338 U CN 201821711338U CN 208982049 U CN208982049 U CN 208982049U
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Abstract
The utility model discloses a kind of for controlling the shield machine of shield attitude drift, multiple openings are preset in shield lower part of the housing in shield machine, the opening runs through middle shield shell inside and outside wall, drilling rod is additionally provided in middle shield shell, and drilling rod is in tilted layout relative to shield direction of advance, the drilling rod can be protruded into below the oblique shield cutter in stratum from opening and be drilled.The utility model passes through in the default opening in middle shield lower part of the housing, when shield machine floats, advance borehole is carried out towards oblique stratum in front of shield by opening and takes out the soil body, make to form the cavity after multiple boring extracting soils below shield cutter, destroy formation stability, shield machine then can be by self weight local subsidence, to achieve the purpose that inhibit the control shield attitude that floats, for the jack force and backing slip casting on existing shield machine, it is easy flexibly with adjustment mode, surrounding formation is influenced smaller, inhibit drift accuracy higher, the more economical controllable feature of process.
Description
Technical field
The utility model relates to shield tunnel construction fields, and in particular to a kind of for controlling the shield of shield attitude drift
Machine.
Background technique
Shield method is the Fully-mechanized construction method of one of shallow mining method, it is pushed away in the earth formation using shield machine
Into supporting surrounding country rock by shield shell and section of jurisdiction and prevent the collapsing in tunnel, while using knife in front of excavation face
Disk carries out soil cutting, and by being unearthed, machinery is transported outside hole, and assembled precast concrete section of jurisdiction, forms a kind of machine of tunnel structure
Tool construction method.
At present in city underground shield tunnel construction, tunneled in mudstone stratum or compound stratum containing such soft stratum
When, or due to geological conditions variability, be likely to encounter shield machine float serious or attitude drift the case where, cause shield machine to dig
It is deviated into direction, seriously jeopardizes safety for tunnel engineering.Shield machine relies on own system to carry out control shield appearance mostly at present
State is such as unevenly exerted a force using jack and tunnel upward floating and backing slip casting construction method is inhibited to can solve shield displacement, but unstable
Slurry material cause a hidden trouble to whole tunnel, and in a short time occur beyond limit, sign shield drift do not have no
Suitable solution.
Utility model content
The utility model aim is: when for tunneling in mudstone stratum or in the compound stratum containing mud stone, being likely to encounter
Shield machine float serious or attitude drift the case where, the problem of causing shield machine tunneling direction to deviate, one kind is provided and is used for
The shield machine of shield attitude drift is controlled, which can carry out advance borehole and be taken out to the shield cutter forward lower part soil body
The soil body makes to form the cavity after multiple boring extracting soils below shield cutter, destroys formation stability, and by under shield machine self weight
Heavy and then inhibition attitude drift achievees the purpose that stable, convenient, safe, economical in mudstone stratum inhibition shield machine drift.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of shield machine to drift about for controlling shield attitude, multiple openings, institute are preset in shield lower part of the housing in shield machine
It states opening and is additionally provided with drilling rod in middle shield shell through middle shield shell inside and outside wall, and drilling rod is tilted relative to shield direction of advance
Arrangement, the drilling rod can be protruded into below the oblique shield cutter in stratum from opening and be drilled.
The utility model is by when shield machine floats, then passing through opening court in the default opening in middle shield lower part of the housing
Oblique stratum carries out advance borehole and takes out the soil body in front of shield, makes to form the sky after multiple boring extracting soils below shield cutter
Hole, destroys formation stability, and shield machine then can be by self weight local subsidence, to reach the mesh for the control shield attitude that inhibits to float
, the shield machine compared to the jack force and backing slip casting on existing shield machine for, with the easy spirit of adjustment mode
It is living, the feature smaller, inhibition drift accuracy is higher, process is more economically controllable is influenced on surrounding formation.
As a preferred embodiment of the present invention, the opening is arranged at the position apart from shield cutter 3-5m, and institute
Some openings are along middle shield shell circle distribution.It is oblique towards shield front by middle shield shell nozzle when detecting that shield machine floats
Advance borehole is carried out to stratum and takes out the soil body, since opening is arranged at the position apart from shield cutter 3-5m, and it is all
Opening can make shield anterior shield lower part after drilling form multiple cavities, and all skies in this way along middle shield shell circle distribution
Hole is circumferentially distributed in anterior shield lower part, convenient for the circumferentially distributed position by adjusting cavity, and then realizes shield attitude adjustment.
As a preferred embodiment of the present invention, the quantity of the opening is 3-5.By being arranged in middle shield lower part of the housing
After 3-5 opening, bore direction can be chosen as needed along opening and carries out advance borehole, more precise control boring extracting soil position
It sets, shield machine is made to sink to the orientation of needs.
As a preferred embodiment of the present invention, the opening is three, and is distributed in 5,6,7 points of middle shield shell cross section
Clock position, setting opening in this way can be in order to, to soil is weighed, being conducive to make shield machine uniform and stable as far as possible in shield anterior shield lower part
Sink.
As a preferred embodiment of the present invention, the drilling rod is 12.5 ° relative to shield direction of advance tilt angle.It adopts
It with such bore angle, was not only operated convenient for drilling construction, but also can shorten as far as possible and be drilled into cutterhead drillable length required below.
As a preferred embodiment of the present invention, the opening is inclined hole, and inclined direction is consistent with drilling rod direction, is convenient for
Advance borehole is carried out towards oblique stratum in front of shield by opening and takes out the soil body.
As a preferred embodiment of the present invention, the opening is additionally provided with the plug for temporary enclosed opening, avoids
Underground water and mud etc. pass through shield enclosure interior in opening entrance before drilling operation.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
1, the utility model is by when shield machine floats, then passing through opening in the default opening in middle shield lower part of the housing
Oblique stratum carries out advance borehole and takes out the soil body in front of towards shield, makes to form the sky after multiple boring extracting soils below shield cutter
Hole, destroys formation stability, and shield machine then can be by self weight local subsidence, to reach the mesh for the control shield attitude that inhibits to float
, the shield machine compared to the jack force and backing slip casting on existing shield machine for, with the easy spirit of adjustment mode
It is living, the feature smaller, inhibition drift accuracy is higher, process is more economically controllable is influenced on surrounding formation；
2, the utility model is by three openings of setting, and is distributed in 5,6,7 o'clock of middle shield shell cross section position, in this way
Setting opening can in order to, to soil is weighed, be conducive to make in shield anterior shield lower part shield machine as far as possible uniform and stable sink.
Detailed description of the invention
Fig. 1 is that shield shell presets aperture position schematic diagram in shield machine in the utility model.
Fig. 2 is shield machine use state diagram in the utility model.
Fig. 3 is shield machine construction process flow chart in the utility model.
Marked in the figure: 1- hollow drill pipe, shield in 2- shield, 21- opening, 3- Tunnel Design axis, below 4- shield anterior shield
Soften part.
Specific embodiment
With reference to the accompanying drawing, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
Embodiment
The present embodiment provides a kind of for controlling the shield machine of shield attitude drift；
As Figure 1-Figure 2, the shield machine to drift about for controlling shield attitude in the present embodiment, 2 shell of shield in shield
Multiple openings 21 are preset in body lower part, and the opening runs through middle shield shell inside and outside wall, is additionally provided with hollow drill pipe 1 in middle shield shell,
And drilling rod is in tilted layout relative to shield direction of advance, the drilling rod can be protruded into from opening below the oblique shield cutter in stratum into
Row drilling.
The utility model is by when shield machine floats, then passing through opening court in the default opening in middle shield lower part of the housing
Oblique stratum carries out advance borehole and takes out the soil body in front of shield, makes to form the sky after multiple boring extracting soils below shield cutter
Hole, destroys formation stability, and shield machine then can be by self weight local subsidence, to reach the mesh for the control shield attitude that inhibits to float
, the shield machine compared to the jack force and backing slip casting on existing shield machine for, with the easy spirit of adjustment mode
It is living, the feature smaller, inhibition drift accuracy is higher, process is more economically controllable is influenced on surrounding formation.
In the present embodiment, the opening is arranged at the position apart from shield cutter 3-5m, and all openings are along middle shield
Shell circle distribution.When detecting that shield machine floats, carried out in advance by middle shield shell nozzle towards oblique stratum in front of shield
It drills and takes out the soil body, since opening is arranged at the position apart from shield cutter 3-5m, and all openings are along middle shield shell
Circle distribution can make shield anterior shield lower part after drilling form multiple cavities in this way, and all cavities are in anterior shield lower part
Circle distribution convenient for the circumferentially distributed position by adjusting cavity, and then realizes shield attitude adjustment.
In the present embodiment, the quantity of the opening is 3-5.By middle shield lower part of the housing be arranged 3-5 be open after, can
As needed choose bore direction along opening carry out advance borehole, more precise control boring extracting soil position, make shield machine to need
The orientation wanted sinks.
In the present embodiment, the opening is three, and is distributed in 5,6,7 o'clock of middle shield shell cross section position, is set in this way
Set opening can in order to, to soil is weighed, be conducive to make in shield anterior shield lower part shield machine as far as possible uniform and stable sink.
In the present embodiment, the drilling rod is 12.5 °, i.e. drilling axis and tunnel relative to shield direction of advance tilt angle
Axis 3 is designed in 12.5 ° of angle settings, drillable length 8m is more than anterior shield 3m, and drill a length of 5.37m in effective hole, effective coring body
Product is 0.021m3.It using such bore angle, was not only operated convenient for drilling construction, but also can shorten as far as possible and be drilled into institute below cutterhead
The drillable length needed.
In the present embodiment, the drilling rod is flexible hollow drill pipe, passes through the down-the-hole being arranged in shield shell in shield
Brill is squeezed into the soil body, assembling drilling rod can be attached according to drillable length, and drilling rod rear portion reinforces in shield, prevent disconnected bar,
Fall bar and causes certain harm to tunnel piercing.
In the present embodiment, the inclined hole that the opening is diameter 50-80mm, inclined direction is consistent with drilling rod direction, is convenient for
Advance borehole is carried out towards oblique stratum in front of shield by opening and takes out the soil body.
In the present embodiment, the opening is additionally provided with the plug for temporary enclosed opening, with avoiding before drilling operation
Be lauched and mud etc. by opening enter in shield enclosure interior.Before carrying out boring extracting soil construction, it is pre- to first pass through middle shield polyurethane
Opening is stayed to take out the worn stratum lower half soil layer core sample of shield machine, whether determine the advance borehole position that will be opened suitable,
Whether stratum consolidates, and avoids borer drill rod from entering stratum unstable, causes to gush or bit freezing bar.
As shown in figure 3, when shield machine floats advance borehole control can be carried out using the shield machine according to the following steps
Attitude of shield machine drift:
Step 1: boring extracting soil: after detecting that shield machine drifts about, shield machine is shut down, the court at middle shield shell nozzle
Oblique stratum carries out advance borehole and simultaneously takes out the soil body in front of shield, by shield 2 enclosure interior of shield using hidden hole drilling and beat
Enter hollow drill pipe 1 to drill, the soil body identical as run of steel is taken out using boring extracting soil device, can be carried out as needed repeatedly
Soil is taken, makes to form the cavity after multiple boring extracting soils below shield cutter；
Step 2: high pressure water rinses: after the soil body takes out, high pressure washing machine being connected the hollow brill in insertion advance borehole
Bar carries out giant flushing to the cavity that the soil body in front of drilling rod is removed, using clear water or compressed air and water by drilling hole
The rock powder etc. adhered on the landwaste and cavity wall at bottom is gone out, until the water gone out, which reaches after certain turbidity requires, stops punching
It washes；
Step 3: injection dispersing agent: injecting mud stone dispersing agent into cavity after taking soil to rinse, make the mud of shield anterior shield lower part
Rock softening, forms and softens part 4 below shield anterior shield, withdraws drilling rod after injecting dispersing agent；
Step 4: shield attitude corrects: after shield lower front mud stone is softened, shield machine sinks to inhibiting shield by self weight
Structure drift, and it is aided with shield driving state modulator, jack force and backing grouting pressure are such as adjusted, attitude of shield machine is enable
Control, shield machine restore to promote.
By when shield machine floats, then passing through and being open towards shield front tiltedly in the default opening in middle shield lower part of the housing
Advance borehole is carried out to stratum and takes out the soil body, makes to form the cavity after multiple boring extracting soils below shield cutter, through high pressure water
Mud stone dispersing agent is injected after rinsing cavity, softens the mud stone of shield anterior shield lower part, shield machine can then rely on self weight local subsidence,
To achieve the purpose that inhibit the control shield attitude that floats, compared to jack force and backing slip casting construction method, there is adjustment
Mode is easy flexibly, smaller on surrounding formation influence, and inhibition drift accuracy is higher, the more economical controllable feature of process.
This programme is using subgrade stress release method, in opposite direction (i.e. below anterior shield) boring extracting soil of shield drift, benefit
With the sedimentation on lower section stratum, so that shield machine center of gravity moves forward, to reduce magnitude of inclination.Using oblique drilling hole, before shield machine
Soil is slowly taken in stratum on the downside of shield, so that prime stratum height declines, shield machine is restoring driving with the effect of gravity
Gradually inhibit drift in the process.
During tunnel excavation, there is free face in rock mass behind excavation cavern, rock mass has deformation space, due to answering
Power locally discharges, and makes rock mass that unloading occur and deform into tunnel, the three-dimensional initial stress state balanced originally causes stress weight
Distribution generates secondary state of stress.Rock stratum above shield machine is softer, below harder and upward by the rock mass stress in rock stratum
When excessive, it is just easy to happen the case where shield machine drifts about upwards.Settling the small side releasing bottom of foundation or less part at this time
The stress of the soil body shifts stress to other parts, to force local sedimentation to increase under conditions of not increasing total load head
Differential settlement is adjusted, can preferably achieve the effect that adjust attitude of shield machine.
Stress relief method is the principle using soil mechanics, beats inclined hole according to certain angle, the part released in ground is answered
Power, to make the stress in foundation soil that redistribution occur, local settling amount increases, to achieve the purpose that correction.
Due to the high sensitivity of weak soil, thixotropy is big, and the shearing strength of the serious disturbance soil body after drilling, the soil body drops significantly
It is low；Form cavity after drilling in foundation soil, the soil body moving radially along hole under Gravitative Loads, using dispersing agent or clear water
Residue in ancillary measure metapore is discharged, while surrounding soil is softened, the soil body be self-possessed and water osmotic pressure effect under,
Deformation along hole radial direction obviously increases, and promotes shield machine local subsidence, and under the action of soil is with shield machine gravity, the soil body is settled down to
Stop sinking after reaching stress equilibrium again.If deflection not enough, needs boring extracting soil again, so that shield machine anterior shield is again
Secondary sinking, until shield machine reaches predetermined position, completion inhibits the purpose of shield drift, adjustment attitude of shield machine.
In the present embodiment, respectively using drilling rod is squeezed at middle shield shell nozzle, boring extracting soil sequence is first in 6 o'clock position
Set, secondly 5 o'clock position, last 7 o'clock position.Native sequence, adjustment control are taken by controlling the advance borehole below shield anterior shield
Shield machine sinking processed orientation, to reach correction purpose.
In the present embodiment, the dispersing agent in step 3 includes surfactant and strong osmotic agent, can rapid osmotic to gluing
In mud zoogloea, oxygenolysis releases bubble, softens mud stone, provides space for shield attitude drift control.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc. within the principle of utility model, should be included in the protection of the utility model
Within the scope of.
Claims (7)
1. a kind of for controlling the shield machine of shield attitude drift, which is characterized in that shield lower part of the housing is default more in shield machine
A opening, the opening run through middle shield shell inside and outside wall, drilling rod are additionally provided in middle shield shell, and drilling rod advances relative to shield
Direction is in tilted layout, and the drilling rod can be protruded into below the oblique shield cutter in stratum from opening and be drilled.
2. according to claim 1 for controlling the shield machine of shield attitude drift, which is characterized in that the opening setting
At the position apart from shield cutter 3-5m, and all openings are along middle shield shell circle distribution.
3. according to claim 1 for controlling the shield machine of shield attitude drift, which is characterized in that the number of the opening
Amount is 3-5.
4. according to claim 3 for controlling the shield machine of shield attitude drift, which is characterized in that the opening is three
It is a, and it is distributed in 5,6,7 o'clock of middle shield shell cross section position.
5. according to claim 1 for controlling the shield machine of shield attitude drift, which is characterized in that the drilling rod is opposite
In shield direction of advance tilt angle be 12.5 °.
6. according to claim 1-5 for controlling the shield machine of shield attitude drift, which is characterized in that described
Opening is inclined hole, and inclined direction is consistent with drilling rod direction.
7. according to claim 1-5 for controlling the shield machine of shield attitude drift, which is characterized in that described
Opening is additionally provided with the plug for temporary enclosed opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821711338.8U CN208982049U (en) | 2018-10-22 | 2018-10-22 | A kind of shield machine to drift about for controlling shield attitude |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821711338.8U CN208982049U (en) | 2018-10-22 | 2018-10-22 | A kind of shield machine to drift about for controlling shield attitude |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208982049U true CN208982049U (en) | 2019-06-14 |
Family
ID=66788521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821711338.8U Active CN208982049U (en) | 2018-10-22 | 2018-10-22 | A kind of shield machine to drift about for controlling shield attitude |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208982049U (en) |
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2018
- 2018-10-22 CN CN201821711338.8U patent/CN208982049U/en active Active
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