CN109879196A - A kind of the support locking mechanism and lock-bit method of axial force of foundation pit steel support servo-system - Google Patents
A kind of the support locking mechanism and lock-bit method of axial force of foundation pit steel support servo-system Download PDFInfo
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- CN109879196A CN109879196A CN201910187349.3A CN201910187349A CN109879196A CN 109879196 A CN109879196 A CN 109879196A CN 201910187349 A CN201910187349 A CN 201910187349A CN 109879196 A CN109879196 A CN 109879196A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 17
- 239000010959 steel Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000006073 displacement reaction Methods 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 230000006837 decompression Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
The invention discloses a kind of support locking mechanism of axial force of foundation pit steel support servo-system and lock-bit methods, including outer housing and roof supporting, roof supporting is vertically provided at one of outside portion of outer housing, jack is provided in outer housing, jack includes cylinder barrel, cylinder barrel is fixedly mounted in outer housing, fore-aft travel piston rod can be provided in cylinder barrel, one end of piston rod is fixedly connected with roof supporting, the first lock-bit gear is coaxially bolted on piston rod, engagement is connected with the second lock-bit gear on first lock-bit gear, a motor is connected on second lock-bit gear, the mounting rack for installing motor is provided on cylinder barrel, motor is movably disposed on mounting rack, control system and power mechanism are additionally provided in outer housing, power mechanism and motor are electrically connected to the control system respectively, displacement sensor is provided on mounting rack, Pressure sensor is provided on jack.Advantage is the pressure maintaining problem that can be efficiently solved when there is larger reduction because of temperature after jack decompression.
Description
Technical field
The present invention relates to a kind of foundation pit axial force of the supports servo-systems, more particularly, to a kind of axial force of foundation pit steel support servo system
The support locking mechanism and its lock-bit method of system.
Background technique
With the quickening of urbanization process, Construction of Deep Excavation Engineering is frequent, and often preservation is largely existing on city foundation pit periphery
Construction of structures, the deformation of building enclosure caused by excavation of foundation pit will lead to soil layer around and deform therewith, and then influences periphery and build
The safe handling of structures.In order to reduce this influence, excavation of foundation pit other than needing to apply the building enclosures such as diaphram wall,
Also need to synchronize the deformation for setting up support system to reduce building enclosure while excavating.
Base pit engineering support system is in addition to first road is using concrete support at present, remaining is all made of based on bracing members, steel branch
Support axle power mainly passes through the hydraulic jack application that end is arranged in, currently in order to realizing the automatic compensation of axial force of the supports, largely
Using axial force of the supports servo-system, axial force of the supports servo-system majority is by installing mechanical lock come pressure maintaining, when guaranteeing decompression
Piston rod will not bounce back, at this stage used mechanical lock, although can be realized pressure holding function under normal usage,
But there is also clearly disadvantageous: when biggish reduction occurs in the temperature in foundation pit, shrinkage can occur for bracing members, need to control at this time
System extends the mandril of jack, will lead to mechanical locking plate and jack in this way there are certain interval, Lock function fails, in turn
The pressure holding function of mechanical lock is set to fail.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of support lock-bit machines of axial force of foundation pit steel support servo-system
Structure and lock-bit method, the support locking mechanism and lock-bit method can be according between the pressure adjust automatically locking mechanisms of jack
Lock-bit spacing can effectively solve pressure maintaining problem when there is larger reduction because of temperature after jack decompression.
The technical scheme of the invention to solve the technical problem is:
A kind of support locking mechanism of axial force of foundation pit steel support servo-system, including outer housing and roof supporting, the support
Top plate is vertically provided at one of outside portion of the outer housing, is provided in the outer housing for making the branch
The ejection of support plate resists the jack of the metope of foundation pit, and the jack includes cylinder barrel, and the cylinder barrel is fixedly mounted on institute
In the outer housing stated, it can be provided with to fore-aft travel piston rod in the cylinder barrel, described in one end of the piston rod is stretched out
Cylinder barrel be fixedly connected with the roof supporting, be coaxially bolted with the first lock-bit gear on the piston rod, described
One lock-bit gear is located at outside the cylinder barrel, and engagement is connected with the second lock-bit gear on the first lock-bit gear, described
The second lock-bit gear on be connected with a motor, the output shaft of the motor and second lock-bit gear is coaxially fixed connects
It connects, the mounting rack for installing the motor is provided on the cylinder barrel, the motor is movably disposed in described
On mounting rack, the activity direction of the motor is consistent with the direction of motion of the roof supporting, in the outer housing also
It is provided with control system and the power mechanism for driving the jack to eject, the power mechanism and the motor
It is electrically connected, is provided on the mounting rack for monitoring the first lock-bit gear position with the control system respectively
Displacement sensor, the pressure sensing for monitoring the ejection pressure in the jack is provided on the jack
Device, the displacement sensor and the pressure sensor are electrically connected with the control system respectively, the control system
System according to the displacement sensor and the pressure sensor monitoring to shift value and pressure value it is described dynamic to control
Force mechanisms and the motor action.
The mounting rack includes a horizontally disposed mounting plate, and one end of the mounting plate is connected with and the peace
The perpendicular support plate of loading board, the lower end of the support plate are fixedly mounted on the cylinder barrel, the support plate it is upper
End is connected to the side of the mounting plate, and the motor can be arranged in moving with the roof supporting direction of motion
On the mounting plate.For making mounting rack be stably mounted to cylinder barrel, mounting plate is used to provide support plate to the installation of motor
Supporting role.
It is arranged at intervals with two linear bearings on the mounting plate, is movably linearly arranged on the linear bearing
There is guide rod, the front end of guide rod described in two is connected by a connecting plate, the connecting plate parallel interval setting
After the roof supporting, the motor is mounted on the back end surface of the connecting plate, the second lock-bit tooth
Wheel is mounted on the front end face of the connecting plate, and the output shaft of the motor passes through the connecting plate and described second
Lock-bit gear is fixedly connected.Connecting plate is used to provide a stable installation to the installation of motor and position, by linear bearing and
The cooperation of guide rod realizes that motor moves in a straight line together with roof supporting, and structure is simple, and using stabilization, while guide rod plays
Share the support force that the output shaft of motor is born.
The power mechanism is hydraulic station, and the hydraulic station is electrically connected with the control system, and described is very heavy
Oil inlet and oil outlet are provided on top, the oil inlet and the oil outlet pass through oil pipe and the hydraulic station respectively
It is connected.Power mechanism is simple, at low cost.
The control system includes data reception module, data comparison module and action command sending module, described
Data reception module is used to receive the shift value and pressure value that the displacement sensor and the pressure sensor monitoring arrive,
And shift value and pressure value are sent to the data comparison module, the data comparison module is exported according to comparison result
It is used to indicate the power mechanism and electric motor starting or the action command signal of stopping, and is used by action command sending module
Corresponding movement is made in the instruction power mechanism and motor.
A kind of lock-bit method of the support locking mechanism of axial force of foundation pit steel support servo-system, includes the following steps:
(1) P is set in the controlsIt is critical, PIt is criticalFor the critical ejection pressure value of jack；
(2) Δ is set in the controlsIt is critical, ΔIt is criticalBetween the rear end face of the first lock-bit gear and the front end face of cylinder barrel
Critical gap；
(3) pass through the interior ejection pressure value P of pressure sensor real-time monitoring jack, and the ejection pressure value P is sent to
Control system, when monitoring P < PIt is criticalWhen, show that bracing members bounce back, needs to control power mechanism work by control system at this time
It is ejected outward with the piston rod of driving jack, when monitoring P >=PIt is criticalWhen, control system control power mechanism fails, and thousand
The ejection of jin top is completed, and is monitored at this time by displacement sensor between the rear end face of the first lock-bit gear and the front end face of cylinder barrel
Separation delta, and send the separation delta to control system, obtain Δ > ΔIt is critical；
(4) rotation of control system control motor, the second lock-bit gear ensue rotation simultaneously, the first lock-bit gear of drive towards
Direction close to cylinder barrel front end face moves linearly, and passes through the rear end face and cylinder of displacement sensor real-time monitoring the first lock-bit gear
Separation delta between the front end face of cylinder, and sends the separation delta to control system, when detecting Δ=ΔIt is criticalWhen, control system
Motor stalls are controlled, lock-bit is completed.
The critical ejection pressure value P of jackIt is criticalIt can be obtained according to the feature calculation of whole base pit engineering.
Compared with the prior art, the advantages of the present invention are as follows: be by pressure sensor and displacement sensor and control
The mutual cooperation of system, can be according to the ejection of the real-time pressure automatic control jack of jack, while adjust automatically first is locked
Lock-bit spacing between position gear and cylinder barrel, to efficiently solve when there is larger reduction because of temperature after jack decompression
Pressure maintaining problem.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the forward viewing portion structural schematic diagram that the present invention removes part enclosure body；
Fig. 3 is the structural schematic diagram that hydraulic station and jack are cooperatively connected；
Fig. 4 is the structural schematic diagram that jack and roof supporting are cooperatively connected in the present invention；
Fig. 5 is that locking mechanism is fitted to the structural schematic diagram on jack in the present invention；
Fig. 6 is the broken section structural schematic diagram of jack in the present invention；
Fig. 7 is the schematic cross-sectional view in the present invention under initial, the non-lock-bit of ejection and ejection three states of lock-bit；
Fig. 8 is the schematic diagram of control system in invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As shown in Figures 1 to 8, a kind of support locking mechanism of axial force of foundation pit steel support servo-system, including 1 He of outer housing
Roof supporting 2, roof supporting 2 are vertically provided at one of outside portion of outer housing 1, are provided in outer housing 1 for making to prop up
Support plate 2 ejects the jack 3 for resisting the metope of foundation pit, and jack 3 includes cylinder barrel 31, and cylinder barrel 31 is fixedly mounted on outer housing 1
It is interior, piston rod 32 can be provided with to fore-aft travel in cylinder barrel 31, cylinder barrel 31 is stretched out in one end of piston rod 32 and roof supporting 2 is fixed
It connects, is coaxially bolted with the first lock-bit gear 4 on piston rod 32, the first lock-bit gear 4 is located at outside cylinder barrel 31, the first lock-bit tooth
Engagement is connected with the second lock-bit gear 5 on wheel 4, and a motor 6, the output shaft of motor 6 and second are connected on the second lock-bit gear 5
Lock-bit gear 5 is fixedly and coaxially connected, and the mounting rack for installing motor 6 is provided on cylinder barrel 31, and motor 6 is movably disposed in
On mounting rack, the activity direction of motor 6 is consistent with the direction of motion of roof supporting 2, is additionally provided with control system in outer housing 1
(not shown) and for drive jack 3 eject power mechanism, power mechanism and motor 6 are electrically connected with control system respectively
It connects, the displacement sensor 41 for monitoring 4 position of the first lock-bit gear is provided on mounting rack, is provided with and is used on jack 3
Monitor the pressure sensor (not shown) of the ejection pressure in jack 3, displacement sensor 41 and pressure sensor difference
It is electrically connected to the control system.
In this particular embodiment, control system is that the conventional control circuit used is adapted with sensor, wherein wrapping
Comparator is included, the data for comparing displacement sensor 41 and pressure sensor monitoring and transmitting are used for by comparator, according to
The comparison result that comparator obtains exports the control signal started or stoped for controlling power mechanism and motor 6, to drive
Power mechanism and motor 6 make corresponding movement.
In this particular embodiment, mounting rack includes a horizontally disposed mounting plate 71, and one end of mounting plate 71 is connected with
The support plate 72 perpendicular with mounting plate 71, the lower end of support plate 72 are fixedly mounted on cylinder barrel 31, and the upper end of support plate 72 connects
It connects in the side of mounting plate 71, motor 6 can be arranged on mounting plate 71 with moving with 2 direction of motion of roof supporting.Support plate
72 for making mounting rack be stably mounted to cylinder barrel 31, and mounting plate 71 is used to provide a supporting role to the installation of motor 6.
In this particular embodiment, two linear bearings 711 are arranged at intervals on mounting plate 71, it can on linear bearing 711
It is provided with to linear movement guide rod 712, the front end of two guide rods 712 is connected by a connecting plate 713, connecting plate
713 parallel intervals are arranged after roof supporting 2, and motor 6 is mounted on the back end surface of connecting plate 713, the second lock-bit gear 5 peace
Mounted in the front end face of connecting plate 713, the output shaft of motor 6 passes through connecting plate 713 and is fixedly connected with the first lock-bit gear 4.Even
Fishplate bar 713, which is used to install, provides a stable installation positioning to the installation of motor 6, passes through linear bearing 711 and guide rod 712
Cooperation realize motor 6 moved in a straight line together with roof supporting 2, structure is simple, and using stabilization, while guide rod 712 plays
Share the support force that the output shaft of motor 6 is born.
In this particular embodiment, power mechanism is hydraulic station 8, and hydraulic station 8 is electrically connected to the control system, on jack 3
It is provided with oil inlet 301 and oil outlet 302, oil inlet 301 is connected by oil pipe 45 with hydraulic station 8 respectively with oil outlet 302.
Power mechanism is simple, at low cost.
In this particular embodiment, control system includes that data reception module, data comparison module and action command are sent
Module, data reception module are used to receive the shift value and pressure value that displacement sensor 41 and pressure sensor monitoring arrive, and will
Shift value and pressure value are sent to data comparison module, and data comparison module is used to indicate power mechanism according to comparison result output
The action command signal started or stoped with motor 6, and power mechanism and motor 6 are used to indicate by action command sending module
Make corresponding movement.
A kind of lock-bit method of the support locking mechanism of axial force of foundation pit steel support servo-system, includes the following steps:
(1) P is set in the controlsIt is critical, PIt is criticalFor the critical ejection pressure value of jack 3；
(2) Δ is set in the controlsIt is critical, ΔIt is criticalFor the first lock-bit gear 4 rear end face and cylinder barrel 31 front end face it
Between critical gap；
(3) pass through the interior ejection pressure value P of pressure sensor real-time monitoring jack 3, and the ejection pressure value P is sent to
Control system, when monitoring P < PIt is criticalWhen, show that bracing members bounce back, needs to control power mechanism work by control system at this time
It is ejected outward with the piston rod 32 of driving jack 3, when monitoring P >=PIt is criticalWhen, control system controls power mechanism and stops making
With the ejection of jack 3 is completed, and monitors the rear end face and cylinder barrel 31 of the first lock-bit gear 4 by displacement sensor 41 at this time
Separation delta between front end face, and send the separation delta to control system, obtain Δ > ΔIt is critical；
(4) control system control motor 6 rotates, and the second lock-bit gear 5 ensues rotation simultaneously, drives the first lock-bit gear 4
It moves linearly towards the direction close to 31 front end face of cylinder barrel, passes through 41 the first lock-bit of real-time monitoring gear 4 of displacement sensor
Separation delta between rear end face and the front end face of cylinder barrel 31, and send the separation delta to control system, when detect Δ=
ΔIt is criticalWhen, control system control motor 6 stops operating, and lock-bit is completed.
In this particular embodiment, the critical ejection pressure value P of jack 3It is criticalIt can be according to the feature meter of whole base pit engineering
It obtains.
Claims (7)
1. a kind of support locking mechanism of axial force of foundation pit steel support servo-system, it is characterised in that including outer housing and branch support
Plate, the roof supporting are vertically provided at one of outside portion of the outer housing, are provided in the outer housing
The jack of the metope of foundation pit is resisted for ejecting the roof supporting, the jack includes cylinder barrel, the cylinder
Cylinder is fixedly mounted in the outer housing, and piston rod, the piston rod can be provided with to fore-aft travel in the cylinder barrel
One end stretch out the cylinder barrel and be fixedly connected with the roof supporting, the first lock-bit is coaxially bolted on the piston rod
Gear, the first lock-bit gear are located at outside the cylinder barrel, and engagement is connected with second on the first lock-bit gear
Lock-bit gear is connected with a motor, the output shaft of the motor and second lock-bit on the second lock-bit gear
Gear is fixedly and coaxially connected, and the mounting rack for installing the motor is provided on the cylinder barrel, and the motor can live
It is arranged on the mounting rack dynamicly, the activity direction of the motor is consistent with the direction of motion of the roof supporting, institute
Control system and the power mechanism for driving the jack to eject, the engine are additionally provided in the outer housing stated
Structure and the motor are electrically connected with the control system respectively, are provided on the mounting rack for monitoring described the
The displacement sensor of one lock-bit gear position is provided on the jack for monitoring the ejection pressure in the jack
The pressure sensor of power, the displacement sensor and the pressure sensor are electrically connected with the control system respectively,
Shift value that the control system is arrived according to the displacement sensor and the pressure sensor monitoring and pressure value come
The control power mechanism and the motor action.
2. a kind of support locking mechanism of axial force of foundation pit steel support servo-system as described in claim 1, it is characterised in that institute
The mounting rack stated includes a horizontally disposed mounting plate, and one end of the mounting plate is connected with perpendicular with the mounting plate
Support plate, the lower end of the support plate is fixedly mounted on the cylinder barrel, and the upper end of the support plate is connected to institute
Can the installation be arranged in moving with the roof supporting direction of motion in the side for the mounting plate stated, the motor
On plate.
3. a kind of support locking mechanism of axial force of foundation pit steel support servo-system as claimed in claim 2, it is characterised in that institute
It is arranged at intervals with two linear bearings on the mounting plate stated, is movably linearly provided with guide rod on the linear bearing,
The front end of guide rod described in two is connected by a connecting plate, and the branch is arranged in the connecting plate parallel interval
After support plate, the motor is mounted on the back end surface of the connecting plate, and the second lock-bit gear is mounted on institute
The front end face for the connecting plate stated, the output shaft of the motor passes through the connecting plate and the second lock-bit gear is solid
Fixed connection.
4. a kind of support locking mechanism of axial force of foundation pit steel support servo-system as described in claim 1, it is characterised in that institute
The power mechanism stated is hydraulic station, and the hydraulic station is electrically connected with the control system, is provided on the jack
Oil inlet and oil outlet, the oil inlet pass through oil pipe with the oil outlet respectively and are connected with the hydraulic station.
5. a kind of support locking mechanism of axial force of foundation pit steel support servo-system as described in claim 1, it is characterised in that institute
The control system stated includes data reception module, data comparison module and action command sending module, the data reception
Block is used to receive the shift value and pressure value that the displacement sensor and the pressure sensor monitoring arrive, and by shift value
It is sent to the data comparison module with pressure value, the data comparison module is used to indicate institute according to comparison result output
The power mechanism and electric motor starting stated or the action command signal of stopping, and be used to indicate by action command sending module described
Power mechanism and motor make corresponding movement.
6. a kind of lock-bit method of the support locking mechanism of axial force of foundation pit steel support servo-system as described in claim 1,
It is characterized in that including the following steps:
(1) P is set in the controlsIt is critical, PIt is criticalFor the critical ejection pressure value of jack；
(2) Δ is set in the controlsIt is critical, ΔIt is criticalBetween the rear end face of the first lock-bit gear and the front end face of cylinder barrel
Critical gap；
(3) pass through the interior ejection pressure value P of pressure sensor real-time monitoring jack, and the ejection pressure value P is sent to
Control system, when monitoring P < PIt is criticalWhen, show that bracing members bounce back, needs to control power mechanism work by control system at this time
It is ejected outward with the piston rod of driving jack, when monitoring P >=PIt is criticalWhen, control system control power mechanism fails, and thousand
The ejection of jin top is completed, and is monitored at this time by displacement sensor between the rear end face of the first lock-bit gear and the front end face of cylinder barrel
Separation delta, and send the separation delta to control system, obtain Δ > ΔIt is critical；
(4) rotation of control system control motor, the second lock-bit gear ensue rotation simultaneously, the first lock-bit gear of drive towards
Direction close to cylinder barrel front end face moves linearly, and passes through the rear end face and cylinder of displacement sensor real-time monitoring the first lock-bit gear
Separation delta between the front end face of cylinder, and sends the separation delta to control system, when detecting Δ=ΔIt is criticalWhen, control system
Motor stalls are controlled, lock-bit is completed.
7. a kind of lock-bit method of the support locking mechanism of axial force of foundation pit steel support servo-system as claimed in claim 6,
It is characterized in that the critical ejection pressure value P of jackIt is criticalIt can be obtained according to the feature calculation of whole base pit engineering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910187349.3A CN109879196A (en) | 2019-03-13 | 2019-03-13 | A kind of the support locking mechanism and lock-bit method of axial force of foundation pit steel support servo-system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910187349.3A CN109879196A (en) | 2019-03-13 | 2019-03-13 | A kind of the support locking mechanism and lock-bit method of axial force of foundation pit steel support servo-system |
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| Publication Number | Publication Date |
|---|---|
| CN109879196A true CN109879196A (en) | 2019-06-14 |
Family
ID=66931963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910187349.3A Pending CN109879196A (en) | 2019-03-13 | 2019-03-13 | A kind of the support locking mechanism and lock-bit method of axial force of foundation pit steel support servo-system |
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| CN (1) | CN109879196A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577707A (en) * | 2020-05-28 | 2020-08-25 | 浙江明思特建筑支护技术有限公司 | Follow-up self-locking hydraulic system |
| CN114687357A (en) * | 2022-04-13 | 2022-07-01 | 上海建工集团股份有限公司 | Spiral regulating and controlling device for supporting axial force of deep foundation pit |
| CN114718084A (en) * | 2022-04-13 | 2022-07-08 | 上海建工集团股份有限公司 | Deep foundation pit supporting axial force spiral adjusting and controlling method |
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| EP0177481A1 (en) * | 1984-09-17 | 1986-04-09 | Hoerbiger Ventilwerke Aktiengesellschaft | Regulating method for a fluid cylinder |
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| CN108584830A (en) * | 2018-05-14 | 2018-09-28 | 长江三峡通航管理局 | A kind of hydraulic jack and control method with mechanical self-latching protective device |
| CN208150914U (en) * | 2018-05-14 | 2018-11-27 | 长江三峡通航管理局 | A kind of hydraulic jack with mechanical self-latching protective device |
| CN209974198U (en) * | 2019-03-13 | 2020-01-21 | 宁波寰禹智能科技有限公司 | Supporting and locking mechanism of foundation pit steel support axial force servo system |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0177481A1 (en) * | 1984-09-17 | 1986-04-09 | Hoerbiger Ventilwerke Aktiengesellschaft | Regulating method for a fluid cylinder |
| CN103459859A (en) * | 2010-12-22 | 2013-12-18 | 艾科安特公司 | Hydraulic cylinder position sensing and locking system and corresponding method |
| CN206554093U (en) * | 2017-03-17 | 2017-10-13 | 上海同禾土木工程科技有限公司 | A kind of double-mechanical in parallel lock branch fastener assembly of axial force of the supports servo-drive system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577707A (en) * | 2020-05-28 | 2020-08-25 | 浙江明思特建筑支护技术有限公司 | Follow-up self-locking hydraulic system |
| CN114687357A (en) * | 2022-04-13 | 2022-07-01 | 上海建工集团股份有限公司 | Spiral regulating and controlling device for supporting axial force of deep foundation pit |
| CN114718084A (en) * | 2022-04-13 | 2022-07-08 | 上海建工集团股份有限公司 | Deep foundation pit supporting axial force spiral adjusting and controlling method |
| CN114718084B (en) * | 2022-04-13 | 2023-08-22 | 上海建工集团股份有限公司 | Spiral regulation and control method for supporting axial force of deep foundation pit |
| CN114687357B (en) * | 2022-04-13 | 2023-08-22 | 上海建工集团股份有限公司 | Deep foundation pit supporting axial force spiral regulation and control device |
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Application publication date: 20190614 |