CN106638614B - A kind of the dynamic regulation system and dynamic regulation method of two-way steel support structure - Google Patents
A kind of the dynamic regulation system and dynamic regulation method of two-way steel support structure Download PDFInfo
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- CN106638614B CN106638614B CN201610993253.2A CN201610993253A CN106638614B CN 106638614 B CN106638614 B CN 106638614B CN 201610993253 A CN201610993253 A CN 201610993253A CN 106638614 B CN106638614 B CN 106638614B
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- jack
- support structure
- bracing members
- axle power
- steel support
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/14—Geometrical or physical properties resilient or elastic
- E02D2200/146—Springs
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The present invention provides a kind of dynamic regulation systems of two-way steel support structure, including two-way steel support structure, axle power loading tool and control centre；Two-way steel support structure includes being set to horizontally-supported and vertical support junction Flexible Node；Flexible Node includes outer case, internal box, the first connection component and the second connection component, and outer case surface offers coaxial the first hole and the second hole, internal box and is set to inside outer case；First connection component and the second connection component are each passed through the first hole and the second hole is connect with internal box；Setting has elastic component between the outer wall of internal box and the inner wall of outer case；Axle power loading tool carries out axle power load to horizontally-supported or vertical support；The working condition of control centre's control axle power loading tool.The present invention solves the problems, such as that two-way steel support structure additional bending moment in axle power load is excessive in the prior art and can not carry out real-time monitoring to two-way steel support structure.
Description
Technical field
The invention belongs to the realm of building construction, are related to the dynamic regulation system and dynamic regulation of a kind of two-way steel support structure
Method.
Background technique
At present in Large Foundation Pit construction, large underground area is excavated generally using armored concrete as the horizontal branch in hole
Support, or Large Foundation Pit is divided into after several sleeve configuration foundation pits by setting up dividing wall and carries out bracing members temporary support, but this
The construction cost of kind way is higher, and construction period is also very long, and concrete structure is to remove heavy workload after the completion of construction,
Noise is big, seriously polluted, is unfavorable for environmental protection.
Another kind method is exactly to use two-way bracing members it overcomes concrete as horizontally-supported after underground excavation at present
Horizontally-supported disadvantage, have many advantages, such as it is reusable, be conducive to environmental protection.
It is by applying prestressing force formation support in end to by root bracing members when using conventional two-way steel support structure
System, vertically and horizontally support intersection generally to use flange joint or anchor ear node, this support node is rigid joint.This
Field technical staff often ignore and applicant have observed that: there is application when applying prestressing force in two-way steel support structure
The axial deformation of prestressed sequencing and support applies prestressed support and generates axial crushing deformation.Due to rigidity
The presence of node, this axial crushing deformation can be directly passed to by rigid joint vertically to support, vertically to support
Will bend, it is curved vertically to support will necessarily to apply the neighbouring bracing members in the same direction of prestressed support and generate
Node additional bending moment can be stepped up the stress of bracing members in this way.Therefore, when construction is to after several supports, previously constructed by
The bracing members stress of power is stepped up, and be will lead to the overstressing of support system and is failed.
As shown in Figure 1, the installation jack in number position shown in FIG. 1 under, and apply prestressing force one by one by numerical order
(such as 756 tons) first apply No. 101 support prestressing force, then apply No. 102 support prestressing force, are then gradually applied to No. 112
Prestressing force is supported, during applying stress according to serial number, applies stress value and is gradually increased, calculated result shows the 1st time
Maximum stress value when load is -160.5MPa, and when finally applying No. 112 support prestressing force, stress value reaches maximum value -
391.8Mpa。
Above-mentioned calculated result shows since the two-way steel support structure using rigid joint is by root application Prestressing
When, it will lead to effect of the bracing members of construction in later period to prestressed bracing members generation additional bending moment has been applied, respective support
Stress maximum value increases to 391.8MPa by 160.5MPa, when being more than the tolerance range of steel support structure, it is possible to cause to prop up
The overstressing of support body system and fail.
Summary of the invention
The purpose of the present invention is to provide a kind of dynamic regulation system of two-way steel support structure and dynamic regulation method, solutions
Certainly when axle power loads, additional bending moment is excessive with additional stress and can not be to two-way steel branch for two-way steel support structure in the prior art
Support structure carries out the problem of real-time monitoring.
In order to solve the above technical problems, the present invention provides a kind of dynamic regulation systems of two-way steel support structure, including
Two-way steel support structure, axle power loading tool and control centre；
The two-way steel support structure includes mutually perpendicular horizontally-supported and vertical support and is set to the level
The Flexible Node of support and the vertical support junction；
The Flexible Node includes outer case, internal box, the first connection component and the second connection component, and the outer case is
Hollow structure, surface offer coaxial the first hole and the second hole, and the internal box is set to inside the outer case；
First connection component and second connection component are each passed through first hole and second hole
It is connect with the internal box；
Setting has elastic component between the outer wall of the internal box and the inner wall of the outer case；
It is described it is horizontally-supported connect with the outer case, the vertical support respectively with first connection component and described
The connection of second connection component；
The axle power loading tool carries out axle power load to the described horizontally-supported or described vertical support；
The control centre controls the working condition of the axle power loading tool.
Further, the outer case and internal box are cube；
Four faces of the outer case and horizontal plane are respectively the first face being parallel to each other and the second face, are parallel to each other
Third face and fourth face, offer coaxial the first hole and the second hole respectively on first face and the second face.
Further, two faces that the internal box is parallel to the horizontal plane are fixed with sliding part, the sliding part and institute
State the inner wall contact of outer case.
Further, the Flexible Node further includes third connection component and the 4th connection component,
First connection component runs through first hole, and one end connect with the internal box, the other end for
The vertical support connection；
Second connection component runs through second hole, and one end connect with the internal box, the other end for
The vertical support connection；
Third connection component one end is connect with the third face of the outer case, the other end be used for it is described horizontally-supported
Connection；
Described 4th connection component one end is connect with the fourth face of the outer case, the other end be used for it is described horizontally-supported
Connection.
Further, first connection component and second connection component and the internal box weld or one at
Type；
The third connection component and the 4th connection component and the outer case are welded or are integrally formed.
Further, first connection component includes first connecting rod and first flange, and the second connection component includes the
Two connecting rods and second flange, third connection component include third connecting rod and third flange, and the 4th connection component includes the 4th
Connecting rod and the 4th flange,
The first connecting rod runs through first hole, and one end connect with the internal box, the other end and described the
One flanged joint, the first flange with the vertical support for connecting；
Second connecting rod runs through second hole, and one end connect with the internal box, the other end and described the
Two flanged joints, the second flange with the vertical support for connecting；
Third connecting rod one end is connect with the third face of the outer case, the other end and the third flanged joint,
The third flange is used for and the horizontally-supported connection；
Described 4th connecting rod one end is connect with the fourth face of the outer case, the other end and the 4th flanged joint,
4th flange is used for and the horizontally-supported connection.
Further, the elastic element is disk spring.
Further, the axle power loading tool is jack, and the jack is equipped with pressure sensor and displacement passes
Sensor,
The pressure sensor is used to measure the axle power of the jack load, and institute's displacement sensors are described for measuring
The length that jack stretches out；
The control centre receives the data of the pressure sensor and the measurement of institute's displacement sensors.
The present invention also provides a kind of sides for carrying out dynamic regulation to two-way steel support structure using above-mentioned regulator control system
Method includes the following steps:
S1: the bracing members in the two-way steel support structure are grouped, the control centre is to the steel in same group
It supports corresponding jack to synchronize regulation, controls the jack pair with the bracing members in group simultaneously according to setting shaft force value
Axle power load is carried out, when load is completed, institute's displacement sensors are using the extension elongation of the jack measured as benchmark position
Shifting is transferred to the control centre；
S2: institute's displacement sensors monitor the real-time extension elongation of the jack and are transferred to the control centre；
S3: the real-time extension elongation of the jack is compared with the basis displacement for the control centre；
S4: when the real-time extension elongation and the basis displacement are unequal, control centre's control is the same as in group
The working condition of all jack makes the real-time extension elongation of all jack be equal to the basis displacement.
Further, the jack is hydraulic jack, in the S1, all bracing members in same group are corresponding
Jack accesses same pumping plant, and the control centre is driven by the pumping plant with all jack in group while work
Make, completes to load the axle power of the bracing members in same group.
Preferably, the control centre is computer automatic control system, and the computer automatic control system passes through PLC
It controls pumping plant and drives the jack.
Further, the S1 is specifically included: being grouped to bracing members in two-way steel support structure, by identical axle power
Bracing members are divided into one group, and the control centre synchronizes regulation to the corresponding jack of bracing members in same group.
Further, the S1 is specifically included: being grouped to bracing members in two-way steel support structure, by all water
Flat bracing members and all vertical bracing members are grouped into the same group, the control centre very heavy jacking corresponding to all bracing members
Row synchronization modulation.
Further, the S1 is specifically included: all Horizontal steelwork bracings being grouped into the same group, all vertical steels
Support is divided into another group, first carries out prestressing force load simultaneously to all Horizontal steelwork bracings, then same to vertical bracing members again
The load of Shi Jinhang prestressing force.
Further, the S1 is specifically included:
S1.1: installing the Horizontal steelwork bracing and the vertical bracing members, then installs and carries out to the Horizontal steelwork bracing
The jack of axle power load, but the jack that the vertical bracing members are carried out with axle power load is not installed；
S1.2: the control centre synchronizes regulation to the corresponding jack of all Horizontal steelwork bracings, to all
The Horizontal steelwork bracing carries out axle power load simultaneously；
S1.3: the jack that the vertical bracing members are carried out with axle power load is installed；
S1.4: the control centre synchronizes regulation to the corresponding jack of all vertical bracing members, to all
The vertical bracing members carry out axle power load simultaneously.
Further, the S1.2 is specifically included: the corresponding jack of all Horizontal steelwork bracings is accessed in the first pumping plant,
Using control centre by all jack in synchronous first group of the driving of first pumping plant, the Horizontal steelwork bracing is carried out
Prestressing force load；
The S1.4 is specifically included: the corresponding jack of all vertical bracing members being accessed in the second pumping plant, using control
Center is carried out prestressing force to the vertical bracing members and is added by all jack in synchronous second group of the driving of second pumping plant
It carries.
Further, the S1 is specifically included: right simultaneously from the both ends of bracing members when carrying out axle power load to bracing members
Bracing members carry out axle power load.
Further, the S1 is specifically included: a jack, control centre's control is respectively arranged at the both ends of bracing members
Two jack of system carry out axle power load to bracing members simultaneously.
Further, the S1 is specifically included: a jack is arranged at the intermediate position of bracing members, using described very heavy
Top carries out axle power load.
Further, the S4 is specifically included: when the corresponding jack of any one bracing members extension elongation with it is described
When basis displacement is unequal, control centre's control is adjusted with the corresponding jack of all bracing members in group, is made same
The extension elongation of all jack in group is equal to the basis displacement.
Further, the dynamic regulation system further includes power output device, the power output device and described thousand
The connection of jin top provides power to the jack；The control centre connect with the power output device, controls the power
The power output of output device.
Further, the power output device is electrohydraulic dynamic device, and the electrohydraulic dynamic device includes proportional overflow
Valve, the control centre connect with the proportional pressure control valve, control the work of the proportional pressure control valve, and the S1 includes: described
Control centre controls the proportional pressure control valve, it is made to be adjusted to setting pressure, and the power output device is defeated to the jack
Power out.
Further, the S1 is specifically included:
Bracing members in the two-way steel support structure are grouped, the control centre controls the power output dress
It sets, adjusts its power output, the power output device is given with all jack output powers in group；
Axle power load, load are carried out to the bracing members in same group according to setting shaft force value with all jack in group
When completion, institute's displacement sensors are transferred to the extension elongation of the jack measured as basis displacement in the control
The heart.
Further, the S4 is specifically included: when the jack extension elongation is greater than the basis displacement,
The control centre controls the power output device to the jack output power, and the jack is being set
Its extension elongation is adjusted under axle power value, foreshortens to the extension elongation equal to the basis displacement.
Further, in the S4, when the extension elongation of the jack is greater than the basis displacement, the jack exists
When its extension elongation can not be shortened under setting shaft force value makes the extension elongation be equal to the basis displacement,
The jack pair bracing members carry out axle power off-load, and adjust its extension elongation, keep the stretching of the jack long
Degree is equal to the basis displacement, and the pressure sensor is using axle power value of the jack at this time after off-load as new setting shaft
Force value is transferred to the control centre.
Further, in the S4, when the jack pair bracing members carry out axle power off-load, using the side of stepping off-load
Formula, the fixed axle power value of each off-load of jack, and adjust and shorten its extension elongation, by stepping off-load and adjustment for several times, directly
Extension elongation to the jack is foreshortened to equal to the basis displacement.
Further, the S4 is specifically included: when the jack extension elongation is less than the basis displacement,
The control centre controls the power output device to the jack output power, and the jack is being set
Its extension elongation is adjusted under axle power value, foreshortens to the extension elongation equal to the basis displacement.
Further, in the S4, when the extension elongation of the jack is less than the basis displacement, the jack exists
When its extension elongation can not be adjusted under setting shaft force value makes the extension elongation be equal to the basis displacement,
The jack pair bracing members carry out axle power load, and adjust its extension elongation, keep the stretching of the jack long
Degree is equal to the basis displacement, and the pressure sensor is using axle power value of the jack at this time after off-load as new setting shaft
Force value is transferred to the control centre.
Further, in the S4, when the jack pair bracing members carry out axle power load, using the side of stepping load
Formula, jack loads fixed axle power value every time, and adjusts its extension elongation, loads and adjusts by stepping for several times, until institute
The extension elongation for stating jack is foreshortened to equal to the basis displacement.
Further, the jack carries out axle power load to bracing members in such a way that stepping loads, when described very heavy
When the axle power value of top load is equal to the maximum internal stress of bracing members itself unstability, the jack stops axle power load, the pressure
The axle power value of jack at this time is transferred to the control centre as axle power upper limit value by force snesor.
Compared with prior art, the dynamic regulation system of two-way steel support structure provided by the invention, on the one hand using soft
Property node, make it is horizontally-supported be not directly contacted with vertical support, when to horizontally-supported load axle power, the pressure of horizontally-supported generation
Compression deformation will not directly act on the vertical support connecting with internal box, so that the lateral displacement of vertical support greatly reduces, this
Sample just effectively reduces the additional bending moment generated when the load of horizontally-supported axle power to vertical support, improves entire two-way bracing members
The force-bearing situation of structure；On the other hand, axle power loading tool is controlled, it can be achieved that the real-time of bracing members axle power by control centre
Regulation prevents from causing the stress of the two-way steel support structure loaded to change because external environment changes.It is provided by the invention
Regulation method can be realized under various different operating conditions to the real-time monitoring of two-way steel axial force of the supports and displacement, face for base pit engineering
When steel shotcrete support system provide safer guarantee.
Detailed description of the invention
Fig. 1 is the schematic diagram of two-way steel support structure axle power load in the prior art；
Fig. 2 is a kind of schematic diagram of the dynamic regulation system of two-way steel support structure provided in an embodiment of the present invention；
Fig. 3-4 is Flexible Node in a kind of dynamic regulation system of two-way steel support structure provided in an embodiment of the present invention
Structural schematic diagram；
Fig. 5-8 is a kind of pair of steel branch in a kind of dynamic regulation method of two-way steel support structure provided in an embodiment of the present invention
Support structure carries out the schematic diagram of the method for axle power load.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to a kind of dynamic regulation system of two-way steel support structure proposed by the present invention
System is described in further detail.According to following explanation and claims, advantages and features of the invention will be become apparent from.It needs to illustrate
, attached drawing is all made of very simplified form and using non-accurate ratio, only conveniently, lucidly to aid in illustrating originally
The purpose of inventive embodiments.
As in Figure 2-4, the present invention provides a kind of dynamic regulation systems of two-way steel support structure, which is characterized in that
Including two-way steel support structure, axle power loading tool 4 and control centre；
The two-way steel support structure includes mutually perpendicular horizontally-supported 1 and vertical support 2 and is set to the water
The Flexible Node 3 of flat support 1 and 2 junction of the vertical support；
The Flexible Node 3 includes outer case 31, internal box 32, the first connection component 35 and the second connection component 36, institute
Stating outer case 31 is hollow structure, and surface offers coaxial the first hole 311 and the second hole 312, the internal box 32
It is set to inside the outer case 31；
First connection component 35 and second connection component 36 are each passed through first hole 311 and described
Two holes 312 are connect with the internal box 32；
Setting has elastic component 33 between the outer wall of the internal box 32 and the inner wall of the outer case 31；
Described horizontally-supported 1 connect with the outer case 31, the vertical support 2 respectively with first connection component 35
It is connected with second connection component 36；
The axle power loading tool 4 carries out axle power load to described horizontally-supported 1 or the vertical support 2；
The control centre controls the working condition of the axle power loading tool 4.
In the scheme of the present embodiment, Flexible Node 3 includes inside and outside cabinet, is equipped with elastic element 33 between the two, horizontal
Support 1 is connect with outer case 31, and vertical support 2 is connect with internal box 32, at this point, horizontally-supported 1 does not connect directly with vertical support 2
Touching, when to horizontally-supported 1 load axle power, horizontally-supported 1 can generate compressive deformation, at this point, horizontally-supported 1 axle power can be transmitted
To outer case 31, outer case 31 is made to generate axial displacement, since outer case 31 is connected by elastic element 33 and internal box 32
It connects, at this point, the displacement of outer case 31 will not directly act on internal box 32, but can first transmit horizontally-supported 31 axle power
To elastic element 33, the deformation of 33 forced compression of elastic element, in this way, the displacement that elastic element 33 passes to internal box 32 can significantly
Reduce, i.e. the displacement of internal box 32 at this time will be less than the displacement of outer case 31, and the side for the vertical support 2 connecting with internal box 32
It will also be greatly reduced to displacement.Through the above technical solutions, to vertical branch when can effectively reduce the load of horizontally-supported 1 axle power
The additional bending moment that support 2 generates.Similarly, when carrying out axle power load to vertical support 2, will also reduce significantly to horizontally-supported 1
The additional bending moment of generation.On this basis, the present invention also passes through control centre and regulates and controls to axle power loading tool 4, Ke Yishi
Now the implementation of two-way steel support structure is regulated and controled, prevents from changing the two-way steel support structure for causing to have loaded because of external environment
Stress changes.
Further, the outer case 31 and internal box 32 are cube (or other shapes, such as spherical
Deng), the outer case 31 be respectively the first face for being parallel to each other and the second face on four faces of horizontal plane, be parallel to each other
Third face and fourth face, offer coaxial the first hole 311 and the second hole respectively on first face and the second face
312。
Further, two faces that the internal box 32 is parallel to the horizontal plane are fixed with sliding part 34, the sliding part
34 contact with the inner wall of the outer case 31.
Preferably, the sliding part 34 is stainless steel plate, and two faces that the internal box 32 is parallel to the horizontal plane are with one
The contact surface painting of stainless steel plate welding, the stainless steel plate and the outer case 31 is applied with lubricating oil.Above scheme can be effective
Reduce the frictional force that relative motion generates between internal box 32 and outer case 31, reduce Influence of Displacement between the two.It is preferred that
, stainless steel plate welding can also be replaced with the lesser object of other coefficient of frictions.
Further, the Flexible Node 3 further includes third connection component 37 and the 4th connection component 38,
First connection component 35 runs through first hole 311, and one end is connect with the internal box 32, the other end
It is connect with the vertical support 2；
Second connection component 36 runs through second hole 312, and one end is connect with the internal box 32, the other end
It is connect with the vertical support 2；
Described 37 one end of third connection component is connect with the third face of the outer case 31, the other end with it is described horizontally-supported
1 connection；
Described 4th connection component, 38 one end is connect with the fourth face of the outer case 31, the other end with it is described horizontally-supported
1 connection.
Further, first connection component 35 and second connection component 36 and the internal box 32 welding or one
It is body formed；
The third connection component 37 and the 4th connection component 38 and the outer case 31 are welded or are integrally formed.
Further, first connection component 35 includes first connecting rod 351 and first flange 352, the second connection group
Part 36 includes the second connecting rod 361 and second flange 362, and third connection component 37 includes third connecting rod 371 and third flange
372, the 4th connection component 38 includes the 4th connecting rod 381 and the 4th flange 382,
The first connecting rod 351 runs through first hole 311, and one end is connect with the internal box 32, the other end
It is connect with the first flange 352, the vertical support 2 is connect with the first flange 352；
Second connecting rod 361 runs through second hole 312, and one end is connect with the internal box 32, the other end
It is connect with the second flange 362, the vertical support 2 is connect with the second flange 362；
Described 371 one end of third connecting rod is connect with the third face of the outer case 31, the other end and the third flange
372 connections, described horizontally-supported 1 connect with the third flange 372；
Described 4th connecting rod, 381 one end is connect with the fourth face of the outer case 31, the other end and the 4th flange
382 connections, described horizontally-supported 1 connect with the 4th flange 382.
Preferably, the outer case 31 includes symmetrical left box body and right case, and the left box body and the right case are logical
It crosses and is bolted the composition outer case 31.Outer case 31 is arranged to two parts, it can be during installation, so that interior case
Body 32 is easier to be installed inside outer case 31.
Preferably, the elastic element 33 is disk spring.The disk spring of a certain specification of selection should be with bracing members
Overall stability of the system in the construction stage is adapted, and prevents bracing members unstability, in the present embodiment, the disk spring of selection because
The power needed for paying attention to its compressive deformation 75% is the support force of bracing members unstability, prevents bracing members unstability.
In the above scheme, the axle power loading tool 4 is jack, and the jack is equipped with pressure sensor and position
Displacement sensor,
The pressure sensor is used to measure the axle power of the jack load, and institute's displacement sensors are described for measuring
The length that jack stretches out；
The control centre receives the data of the pressure sensor and the measurement of institute's displacement sensors.
Preferably, jack can be respectively provided at the both ends of described horizontally-supported 1 or the vertical support 2, carrying out
When axle power loads, the jack at both ends carries out axle power load simultaneously.Both ends carry out axle power load simultaneously, can effectively reduce steel
The slenderness ratio of support reduces additional bending moment and additional stress.
The present invention also provides a kind of sides for carrying out dynamic regulation to two-way steel support structure using above-mentioned regulator control system
Method includes the following steps:
S1: the bracing members in the two-way steel support structure are grouped, the control centre is to the steel in same group
It supports corresponding jack to synchronize regulation, controls the jack pair with the bracing members in group simultaneously according to setting shaft force value
Axle power load is carried out, when load is completed, institute's displacement sensors are using the extension elongation of the jack measured as benchmark position
Shifting is transferred to the control centre；
S2: institute's displacement sensors monitor the real-time extension elongation of the jack and are transferred to the control centre；
S3: the real-time extension elongation of the jack is compared with the basis displacement for the control centre；
S4: when the real-time extension elongation and the basis displacement are unequal, control centre's control is the same as in group
The working condition of all jack makes the real-time extension elongation of all jack be equal to the basis displacement.
Further, the jack is hydraulic jack, in the S1, by all very heavy apical graftings in same group
Enter same pumping plant, the control centre is driven by the pumping plant and worked at the same time with all jack in group, completion pair
Axle power with the bracing members in group loads.In the above-mentioned technical solutions, specifically, end and base pit engineering in bracing members
Go along with sb. to guard him between install a jack, then using the jack simultaneously in same group bracing members carry out prestressing force add
It carries.It may occur to persons skilled in the art that should be not only limited to use very heavy when carrying out prestressing force load to bracing members
Top, can also be using other tools such as hydraulic cylinder etc..Therefore, prestressing force load is carried out using different tools, it should
It belongs to the scope of protection of the present invention.
Further, the control centre is computer automatic control system, and the computer automatic control system passes through
PLC controls pumping plant and drives the jack.It is uniformly controlled using computer automatic control system, it can be to avoid because manually-operated
Jack generates otherness in synchronous working caused by otherness, and more efficient.
Further, the S1 is specifically included: being grouped to bracing members in two-way steel support structure, by identical axle power
Bracing members are divided into one group, and the control centre synchronizes regulation to the corresponding jack of bracing members in same group.
Further, the S1 is specifically included: bracing members in two-way steel support structure are grouped, it will be all described
Horizontal steelwork bracing and all vertical bracing members are grouped into the same group, and the control centre is to the corresponding jack of all bracing members
Synchronize regulation.Prestressing force is applied to all bracing members simultaneously, it can will be by additional bending moment shadow caused by root application Prestressing
Ring be reduced to it is minimum so that steel support structure apply it is prestressed during do not influenced by excessive additional stress, can be with
The stability of steel support structure is effectively ensured.
As viewed in figures 5-8, further, the S1 is specifically included: all Horizontal steelwork bracings being grouped into the same group, institute
There is the vertical steel support to be divided into another group, prestressing force load first is carried out simultaneously to all Horizontal steelwork bracings, it is then right again
Vertical bracing members carry out prestressing force load simultaneously.
Further, the S1 is specifically included:
S1.1: installing the Horizontal steelwork bracing and the vertical bracing members, then installs and carries out to the Horizontal steelwork bracing
The jack of axle power load, but the jack that the vertical bracing members are carried out with axle power load is not installed；The purpose is to apply
When the load in single direction, since the support constraint in another direction is not yet formed, support system overall deformation shows as supporting
The compressive deformation of ontology, therefore be not in additional bending moment；
S1.2: the control centre synchronizes regulation to the corresponding jack of all Horizontal steelwork bracings, to all
The Horizontal steelwork bracing carries out axle power load simultaneously；
S1.3: the jack that the vertical bracing members are carried out with axle power load is installed；
S1.4: the control centre synchronizes regulation to the corresponding jack of all vertical bracing members, to all
The vertical bracing members carry out axle power load simultaneously.
Further, the S1.2 is specifically included: the corresponding jack of all Horizontal steelwork bracings is accessed in the first pumping plant,
Using control centre by all jack in synchronous first group of the driving of first pumping plant, the Horizontal steelwork bracing is carried out
Prestressing force load；
The S1.4 is specifically included: the corresponding jack of all vertical bracing members being accessed in the second pumping plant, using control
Center is carried out prestressing force to the vertical bracing members and is added by all jack in synchronous second group of the driving of second pumping plant
It carries.
Wherein, the control centre is computer automatic control system, and the computer automatic control system is controlled by PLC
It makes first pumping plant or second pumping plant drives the work of the jack.
Further, the S1 is specifically included: right simultaneously from the both ends of bracing members when carrying out axle power load to bracing members
Bracing members carry out axle power load.By using above-mentioned technical proposal, when carrying out axle power load to bracing members, due to from bracing members
Both ends simultaneously bracing members are loaded, then its compressive deformation is compared the case where only being loaded from bracing members one end and is reduced
The axial crushing deformation that half, i.e. bracing members are generated when both ends load simultaneously is Δ L=NL/ (2EI), and is only carried out from one end
The axial crushing deformation that load generates is Δ L=NL/EI).In this way, can reduce to a certain extent to perpendicular direction
The additional bending moment of bracing members, thus the additional stress that the bracing members for reducing vertical direction generate the bracing members of subsequent load, drop
Low bearing stress shortens construction period.
Further, the S1 is specifically included: a jack, control centre's control is respectively arranged at the both ends of bracing members
Two jack of system carry out axle power load to bracing members simultaneously.It may occur to persons skilled in the art that in the present case
It is not limited solely to using jack as axle power loading tool, other tools such as hydraulic cylinder etc. can be used as axle power and add
The tool application of load is into the present invention, it will be understood that the selection of this tool also belongs to protection scope of the present invention.
Further, the S1 is specifically included: a jack is arranged at the intermediate position of bracing members, using described very heavy
Top carries out axle power load.When jack is arranged at intermediate position, it is only necessary to which previous embodiment can be realized in a jack
In the effect of axle power load is carried out using two jack at bracing members both ends, can effectively reduce the quantity of jack, reach
To the purpose of save the cost.
Further, the S4 is specifically included: when the corresponding jack of any one bracing members extension elongation with it is described
When basis displacement is unequal, control centre's control is adjusted with the corresponding jack of all bracing members in group, is made same
The extension elongation of all jack in group is equal to the basis displacement.
Further, the dynamic regulation system further includes power output device, the power output device and described thousand
The connection of jin top provides power to the jack；The control centre connect with the power output device, controls the power
The power output of output device.
Further, the power output device is electrohydraulic dynamic device, and the electrohydraulic dynamic device includes proportional overflow
Valve, the control centre connect with the proportional pressure control valve, control the work of the proportional pressure control valve, and the S1 includes: described
Control centre controls the proportional pressure control valve, it is made to be adjusted to setting pressure, and the power output device is defeated to the jack
Power out.
Further, the S1 is specifically included:
Bracing members in the two-way steel support structure are grouped, the control centre controls the power output dress
It sets, adjusts its power output, the power output device is given with all jack output powers in group；
Axle power load, load are carried out to the bracing members in same group according to setting shaft force value with all jack in group
When completion, institute's displacement sensors are transferred to the extension elongation of the jack measured as basis displacement in the control
The heart.
It is described according to the deviation between the extension elongation of jack and the basis displacement in above-mentioned adjusting method
S4 specifically includes a variety of situations:
The first situation are as follows: when the jack extension elongation is greater than the basis displacement, the jack is in setting shaft
Its extension elongation is adjusted under force value, when the extension elongation can be made to foreshorten to equal to the basis displacement, is done directly at this time
Regulate and control step, it is ensured that the axle power of bracing members and displacement are within the set range.
Second situation are as follows: when the extension elongation of the jack is greater than the basis displacement, the jack is being set
When its extension elongation can not be shortened under axle power value makes the extension elongation be equal to the basis displacement, show that axle power value at this time is inclined
Greatly, at this time, it may be necessary to which the jack pair bracing members carry out axle power off-load, and its extension elongation is adjusted, makes stretching for the jack
Length is equal to the basis displacement out, completes regulation.Meanwhile axis of the pressure sensor by jack at this time after off-load
Force value is transferred to the control centre as new setting shaft force value, during real-time monitoring later, when jack stretches out
When length changes again, the extension elongation of oil cylinder will be adjusted under new setting shaft force value.
Preferably, when above-mentioned jack pair bracing members carry out axle power off-load, the side of stepping off-load can be used
When formula, i.e. jack first time off-load, the fixed axle power value of off-load (such as reducing 5 tons every time), first time off-load is adjusted after the completion
The whole extension elongation for shortening jack, if being still unable to reach makes extension elongation be equal to basis displacement, then is subtracted for the second time
It carries, adjusts the extension elongation of jack again after the completion of second of off-load, if being still unable to reach makes extension elongation be equal to benchmark position
It moves, then carries out third time off-load and adjustment, pass through stepping off-load and adjustment for several times in this way, until the extension elongation of the jack
It foreshortens to and is equal to the basis displacement, then complete at this time.
The third situation are as follows: when the jack extension elongation is less than the basis displacement, the jack is being set
Its extension elongation is adjusted under axle power value, it is directly complete at this time when can make the extension elongation elongation to equal than the basis displacement
At regulation step, it is ensured that the axle power of bracing members and displacement are within the set range.
4th kind of situation are as follows: when the extension elongation of the jack is less than the basis displacement, but the jack is being set
When its extension elongation can not be adjusted under dead axle force value makes the extension elongation be equal to the basis displacement, show axle power value at this time
It is less than normal, at this time, it may be necessary to which the jack pair bracing members carry out axle power load, and its extension elongation is adjusted, makes the jack
Extension elongation is equal to the basis displacement, completes regulation.Meanwhile the pressure sensor by jack at this time after off-load
Axle power value is transferred to the control centre as new setting shaft force value, during real-time monitoring later, when jack is stretched
When length changes again out, the extension elongation of oil cylinder will be adjusted under new setting shaft force value.
It is similar with above-mentioned stepping off-load, preferably, when the jack pair bracing members carry out axle power load, equally
Can be by the way of stepping load, jack loads fixed axle power value every time, and adjusts its extension elongation, by walking for several times
It then completes at this time into load and adjustment until the extension elongation of the jack is foreshortened to equal to the basis displacement.
5th kind of situation are as follows: when the extension elongation of the jack is less than the basis displacement, but the jack is being set
When can not adjust extension elongation under dead axle force value and reaching equal to the basis displacement, show that axle power value at this time is less than normal, this
When, need bracing members described in jack pair to carry out axle power load, the jack is in such a way that stepping loads to the steel branch
Support carries out axle power load, but when the axle power value of jack load is equal to the maximum internal stress of itself unstability of the bracing members
When, at this point, the extension elongation of the jack still can not be made to be equal to the basis displacement, at this point, axle power load should be stopped,
Prevent bracing members itself unstability.Based on regulation later should switch to regulate and control with axle power, at this point, the pressure sensor will be very heavy
The axle power value of top load is transferred to the control centre as axle power upper limit value, the mesh regulated and controled using this axle power upper limit value as axle power
Scale value.The jack carries out axle power load to bracing members in such a way that stepping loads, when the axle power of jack load
When value is equal to the maximum internal stress of bracing members itself unstability, the jack stops axle power load, the pressure sensor by this
When jack axle power value be transferred to the control centre as axle power upper limit value, regulated and controled using this axle power upper limit value as axle power
Target value.
Further, in above-mentioned 5th kind of situation, the adjusting method further include:
S5: the axle power value of the load of jack described in the pressure sensor real-time monitoring, and real-time axle power value is transferred to
The control centre；
S6: the real-time axle power value is compared with the axle power upper limit value for the control centre；
S7: when the real-time axle power value and the axle power upper limit value are unequal, the control centre controls the power
Output device gives the jack output power, and the jack adjusts the axle power value of its load, makes described real-time axle power value etc.
In the axle power upper limit value.The regulation step of the S5-S7 be with axle power regulate and control based on regulation method.
On the one hand the dynamic regulation system of two-way steel support structure provided by the invention uses Flexible Node, makes horizontal branch
Support is not directly contacted with vertical support, and when to horizontally-supported load axle power, the compressive deformation of horizontally-supported generation will not be direct
The vertical support connecting with internal box is acted on, so that the lateral displacement of vertical support greatly reduces, it is thus effective to reduce
The additional bending moment generated when horizontally-supported axle power loads to vertical support improves the stress shape of entire two-way steel support structure
Condition；On the other hand, axle power loading tool is controlled by control centre, it can be achieved that real-time monitoring to bracing members axle power, prevent because
External environment variation causes the stress of the two-way steel support structure loaded to change.Regulation method provided by the invention can be with
The real-time monitoring to two-way steel axial force of the supports and displacement is realized under various different operating conditions, is the supporting of base pit engineering temporary steel support
System provides safer guarantee.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (30)
1. a kind of dynamic regulation system of two-way steel support structure, which is characterized in that loaded including two-way steel support structure, axle power
Tool and control centre；
The two-way steel support structure includes mutually perpendicular horizontally-supported and vertical support and is set to described horizontally-supported
With the Flexible Node of the vertical support junction；
The Flexible Node includes outer case, internal box, the first connection component and the second connection component, and the outer case is hollow
Structure, surface offer coaxial the first hole and the second hole, and the internal box is set to inside the outer case；
First connection component and second connection component are each passed through first hole and second hole and institute
State internal box connection；
Setting has elastic component between the outer wall of the internal box and the inner wall of the outer case；
It is described it is horizontally-supported connect with the outer case, the vertical support respectively with first connection component and described second
Connection component connection；
The axle power loading tool carries out axle power load to the described horizontally-supported or described vertical support；
The control centre controls the working condition of the axle power loading tool.
2. a kind of dynamic regulation system of two-way steel support structure according to claim 1, which is characterized in that the outer container
Body and internal box are cube；
Four faces of the outer case and horizontal plane be respectively the first face for being parallel to each other and the second face, be parallel to each other the
Three faces and fourth face offer coaxial the first hole and the second hole on first face and the second face respectively.
3. a kind of dynamic regulation system of two-way steel support structure according to claim 2, which is characterized in that the interior case
Two faces that body is parallel to the horizontal plane are fixed with sliding part, and the sliding part is contacted with the inner wall of the outer case.
4. a kind of dynamic regulation system of two-way steel support structure according to claim 2, which is characterized in that the flexibility
Node further includes third connection component and the 4th connection component,
First connection component runs through first hole, and one end connect with the internal box, the other end for it is described
Vertical support connection；
Second connection component runs through second hole, and one end connect with the internal box, the other end for it is described
Vertical support connection；
Third connection component one end is connect with the third face of the outer case, and the other end is used for and the horizontally-supported company
It connects；
Described 4th connection component one end is connect with the fourth face of the outer case, and the other end is used for and the horizontally-supported company
It connects.
5. a kind of dynamic regulation system of two-way steel support structure according to claim 4, which is characterized in that described first
Connection component and second connection component and the internal box are welded or are integrally formed；
The third connection component and the 4th connection component and the outer case are welded or are integrally formed.
6. a kind of dynamic regulation system of two-way steel support structure according to claim 4, which is characterized in that described first
Connection component includes first connecting rod and first flange, and the second connection component includes the second connecting rod and second flange, and third connects
Connected components include third connecting rod and third flange, and the 4th connection component includes the 4th connecting rod and the 4th flange,
The first connecting rod runs through first hole, and one end is connect with the internal box, the other end and first method
Orchid connection, the first flange with the vertical support for connecting；
Second connecting rod runs through second hole, and one end is connect with the internal box, the other end and second method
Orchid connection, the second flange with the vertical support for connecting；
Third connecting rod one end is connect with the third face of the outer case, the other end and the third flanged joint, described
Third flange is used for and the horizontally-supported connection；
Described 4th connecting rod one end is connect with the fourth face of the outer case, the other end and the 4th flanged joint, described
4th flange is used for and the horizontally-supported connection.
7. a kind of dynamic regulation system of two-way steel support structure according to claim 1-6, which is characterized in that
The elastic element is disk spring.
8. a kind of dynamic regulation system of two-way steel support structure according to claim 1-6, which is characterized in that
The axle power loading tool is jack, and the jack is equipped with pressure sensor and displacement sensor,
The pressure sensor is used to measure the axle power of the jack load, and institute's displacement sensors are described very heavy for measuring
Push up the length stretched out；
The control centre receives the data of the pressure sensor and the measurement of institute's displacement sensors.
9. a kind of method that dynamic regulation is carried out to two-way steel support structure using regulator control system as claimed in claim 8,
It is characterized in that, includes the following steps:
S1: the bracing members in the two-way steel support structure are grouped, the control centre is to the bracing members in same group
Corresponding jack synchronizes regulation, controls the jack pair with the bracing members in group according to setting shaft force value while carrying out
Axle power load, when load is completed, institute's displacement sensors are passed the extension elongation of the jack measured as basis displacement
It is defeated by the control centre；
S2: institute's displacement sensors monitor the real-time extension elongation of the jack and are transferred to the control centre；
S3: the real-time extension elongation of the jack is compared with the basis displacement for the control centre；
S4: when the real-time extension elongation and the basis displacement are unequal, control centre's control is the same as all in group
The working condition of the jack makes the real-time extension elongation of all jack be equal to the basis displacement.
10. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 9, which is characterized in that
The jack is hydraulic jack, and in the S1, the corresponding jack of all bracing members in same group is accessed same pump
It stands, the control centre is driven by the pumping plant and worked at the same time with all jack in group, is completed in same group
The axle power of the bracing members loads.
11. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 10, which is characterized in that
The control centre is computer automatic control system, and the computer automatic control system controls pumping plant by PLC and drives institute
State jack.
12. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 9, which is characterized in that
The S1 is specifically included: being grouped to bracing members in two-way steel support structure, the bracing members of identical axle power is divided into one group, institute
It states control centre and regulation is synchronized to the corresponding jack of bracing members in same group.
13. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 9, which is characterized in that
The S1 is specifically included: being grouped to bracing members in two-way steel support structure, by all Horizontal steelwork bracings and all institutes
It states vertical bracing members to be grouped into the same group, the control centre synchronizes regulation to the corresponding jack of all bracing members.
14. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 9, which is characterized in that
The S1 is specifically included: all Horizontal steelwork bracings being grouped into the same group, all vertical bracing members are divided into another group, first
Prestressing force load is carried out simultaneously to all Horizontal steelwork bracings, prestressing force load is then carried out simultaneously to vertical bracing members again.
15. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 14, which is characterized in that
The S1 is specifically included:
S1.1: installing the Horizontal steelwork bracing and the vertical bracing members, then installs and carries out axle power to the Horizontal steelwork bracing
The jack of load, but the jack that the vertical bracing members are carried out with axle power load is not installed；
S1.2: the control centre synchronizes regulation to the corresponding jack of all Horizontal steelwork bracings, to all described
Horizontal steelwork bracing carries out axle power load simultaneously；
S1.3: the jack that the vertical bracing members are carried out with axle power load is installed；
S1.4: the control centre synchronizes regulation to the corresponding jack of all vertical bracing members, to all described
Vertical bracing members carry out axle power load simultaneously.
16. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 15, which is characterized in that
The S1.2 is specifically included: the corresponding jack of all Horizontal steelwork bracings being accessed in the first pumping plant, using control centre
By all jack in synchronous first group of the driving of first pumping plant, prestressing force load is carried out to the Horizontal steelwork bracing；
The S1.4 is specifically included: the corresponding jack of all vertical bracing members being accessed in the second pumping plant, using control centre
By all jack in synchronous second group of the driving of second pumping plant, prestressing force load is carried out to the vertical bracing members.
17. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 9, which is characterized in that
The S1 is specifically included: when carrying out axle power load to bracing members, being carried out axle power to bracing members simultaneously from the both ends of bracing members and is added
It carries.
18. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 17, which is characterized in that
The S1 is specifically included: a jack is respectively arranged at the both ends of bracing members, the control centre controls two jack
Axle power load is carried out to bracing members simultaneously.
19. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 9, which is characterized in that
The S1 is specifically included: a jack is arranged at the intermediate position of bracing members, carries out axle power load using the jack.
20. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 9, which is characterized in that
The S4 is specifically included: when the extension elongation of the corresponding jack of any one bracing members and the basis displacement are unequal,
Control centre's control is adjusted with the corresponding jack of all bracing members in group, makes all jack in same group
Extension elongation is equal to the basis displacement.
21. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 9, which is characterized in that
The dynamic regulation system further includes power output device, and the power output device is connect with the jack, gives described thousand
Jin top provides power；The control centre connect with the power output device, and the power for controlling the power output device is defeated
Out.
22. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 21, which is characterized in that
The power output device be electrohydraulic dynamic device, the electrohydraulic dynamic device includes proportional pressure control valve, the control centre with
The proportional pressure control valve connection, controls the work of the proportional pressure control valve, and the S1 includes: that the control centre controls the ratio
Example overflow valve, makes it be adjusted to setting pressure, and the power output device gives the jack output power.
23. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 21, which is characterized in that
The S1 is specifically included:
Bracing members in the two-way steel support structure are grouped, the control centre controls the power output device,
Its power output is adjusted, the power output device is given with all jack output powers in group；
Axle power load is carried out to the bracing members in same group according to setting shaft force value with all jack in group, load is completed
When, the extension elongation of the jack measured is transferred to the control centre by institute's displacement sensors.
24. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 23, which is characterized in that
The S4 is specifically included: when the jack extension elongation is greater than the basis displacement,
The control centre controls the power output device to the jack output power, and the jack is in setting axle power
Its extension elongation is adjusted under value, foreshortens to the extension elongation equal to the basis displacement.
25. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 23, which is characterized in that
In the S4, when the extension elongation of the jack is greater than the basis displacement, the jack can not under setting shaft force value
When shortening its extension elongation makes the extension elongation be equal to the basis displacement,
The jack pair bracing members carry out axle power off-load, and adjust its extension elongation, make the extension elongation etc. of the jack
In the basis displacement, the pressure sensor is using axle power value of the jack at this time after off-load as new setting shaft force value
It is transferred to the control centre.
26. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 25, which is characterized in that
In the S4, when the jack pair bracing members carry out axle power off-load, by the way of stepping off-load, each off-load of jack
Fixed axle power value, and adjust and shorten its extension elongation, by stepping off-load and adjustment for several times, until the stretching of the jack
Length is foreshortened to equal to the basis displacement.
27. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 23, which is characterized in that
The S4 is specifically included: when the jack extension elongation is less than the basis displacement,
The control centre controls the power output device to the jack output power, and the jack is in setting axle power
Its extension elongation is adjusted under value, foreshortens to the extension elongation equal to the basis displacement.
28. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 23, which is characterized in that
In the S4, when the extension elongation of the jack is less than the basis displacement, the jack can not under setting shaft force value
When adjusting its extension elongation makes the extension elongation be equal to the basis displacement,
The jack pair bracing members carry out axle power load, and adjust its extension elongation, make the extension elongation etc. of the jack
In the basis displacement, the pressure sensor is using axle power value of the jack at this time after off-load as new setting shaft force value
It is transferred to the control centre.
29. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 28, which is characterized in that
In the S4, when the jack pair bracing members carry out axle power load, by the way of stepping load, jack loads every time
Fixed axle power value, and its extension elongation is adjusted, it loads and adjusts by stepping for several times, until the extension elongation of the jack
It foreshortens to and is equal to the basis displacement.
30. a kind of method for carrying out dynamic regulation to two-way steel support structure according to claim 29, which is characterized in that
The jack carries out axle power load to bracing members in such a way that stepping loads, when the axle power value of jack load is equal to
When the maximum internal stress of bracing members itself unstability, the jack stops axle power load, and the pressure sensor will be very heavy at this time
The axle power value on top is transferred to the control centre as axle power upper limit value.
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| CN107142951A (en) * | 2017-06-12 | 2017-09-08 | 上海市机械施工集团有限公司 | Bracing members cruciform joint |
| CN108343070A (en) * | 2018-03-12 | 2018-07-31 | 上海建工建集团有限公司 | A kind of Bidirectional supporting system deformation monitoring compensation device and construction method |
| CN114059550B (en) * | 2021-11-24 | 2023-05-30 | 上海建工集团股份有限公司 | Shaft force checking and regulating system and method for foundation pit servo steel support system |
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