CN104762976A - Foundation pit support axial force following control system and method - Google Patents
Foundation pit support axial force following control system and method Download PDFInfo
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- CN104762976A CN104762976A CN201510117614.2A CN201510117614A CN104762976A CN 104762976 A CN104762976 A CN 104762976A CN 201510117614 A CN201510117614 A CN 201510117614A CN 104762976 A CN104762976 A CN 104762976A
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Abstract
The invention provides a foundation pit support axial force following control system and method. The system comprises a hydraulic cylinder, a support seat, a locking block, an ejection rod, a supporting frame, a self-locking oil cylinder and a programmable logic controller (PLC) unit. The ejection rod is fixedly connected with one end of a piston rod of the hydraulic cylinder, a plurality of snapping teeth and guide grooves are formed in both the ejection rod and the locking block at intervals, and the self-locking oil cylinder drives the locking block to move to complete mechanical self-locking of the hydraulic cylinder. The action relationship between the hydraulic cylinder and the self-locking oil cylinder is coordinated through the PLC unit to complete the ejection and mechanical self-locking of the hydraulic cylinder. By means of the system and the method, resource consumption and potential safety hazards caused by manual operations can be prevented, and the foundation pit safe and orderly construction is further guaranteed.
Description
Technical field
The invention belongs to foundation pit construction field, particularly a kind of foundation ditch axial force of the supports following control system and method.
Background technology
Along with the fast development of urbanization process, the construction in city also becomes more diversified with complicated, and the environment of construction also becomes increasingly complex, and required standard is also more and more higher.Nowadays; when carrying out ground construction, particularly in the process of deep pit digging, in order to protect the safety of foundation ditch self and periphery building structure; generally need to adopt some supporting and protection structure to carry out supporting to deep foundation ditch, such as steel bar concrete support, steel pipe support etc.Due to steel pipe support, to have speed fast, low cost and other advantages, it is increasingly used for deep foundation pit support, at some, extremely strict occasion being required to deformation control of foundation pit especially, as run the Deformation control etc. of the Soft Soil Foundation Pit engineering on subway limit, generally also needing according to designing requirement Shi Hanzhang, but along with the passing of engineering time, bracing members can produce stress relaxation, and the prestressing force on bracing members can reduce, and sometimes even disappears.Usual needs arrange a bracing members axle force control device between steel pipe support and enclosure wall, a normally jack, as hydraulic jack and oil cylinder, by this bracing members Shi Hanzhang of this jack pair, to prevent enclosure wall in Excavation Process because the loss of bracing members axle power causes foundation pit deformation to runaway.
Chinese patent literature CN101776106B discloses a kind of axial force of foundation pit steel support adaptive system real-time compensating cylinder system on October 17th, 2012, when oil cylinder carries out " stretching " work, first piston bar advances and drives screw rod to advance, now, because locking nut is connected with screw flight, described locking nut is followed screw rod and is advanced, thus corresponding gap can be produced at locking nut between connection spacer shell and dust cover, in order to prevent eliminating the gap between locking nut and dust cover, on-the-spot operating personnel must descend Brace in Deep Footing Groove compensating cylinder position, manual turn locking nut, make itself and dust cover by jail, thus realize locked cylinder operating position.Once oil cylinder breaks down or oil supply loop generation oil leakage phenomenon, in oil cylinder, the pressure of oil can reduce suddenly, screw rod will fast fallback, because locking nut leans against on dust cover, screw rod rollback can be stoped, thus avoid steel pipe support the support of space enclosing structure was lost efficacy, ensure that the construction safety of deep foundation ditch.
Because in work progress, all the time all some micro-strains can there are in foundation ditch, when deflection is accumulated to certain value, now, in hydraulic cylinder, the pressure of oil is also along with dropping to a certain limit value, in order to avoid foundation pit deformation is excessive, just need the overhang of adjustment hydraulic cylinder piston rod in time, so need people for removing turn locking nut continually.Usually, deep foundation ditch needs tens even hundreds of such steel pipe supports, so large workload intangibly can add the labour intensity of operating personnel, and due to artificial reason, inevitably omit certain root steel pipe support or certain locking nut turn work, thus some unsafe factors can be left to foundation pit construction; In addition, deep foundation pit construction environment is relatively more severe, is easy to operator safety accident occurs.
Therefore, a kind of self-locking system that can lock hydraulic cylinder works state is in time provided, can avoid artificial rotational lock nut cause manpower, financial resources a large amount of waste and some unsafe factors of bringing, inventing a kind of foundation ditch axial force of the supports following control system and method is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
In order to be out of shape a wayward difficult problem when solving deep foundation ditch in geotechnical engineering (especially complex geologic conditions and environmentally sensitive area deep foundation ditch as along the line in city operations subway) excavation construction, foundation ditch axial force of the supports following control system provided by the invention and method, the duty of hydraulic cylinder can be locked in time, realize the real-time mechanical self-latching function of hydraulic cylinder, thus avoid manpower that manual operation causes, a large amount of waste of financial resources and some unsafe factors brought, not only reduce the use human cost of foundation ditch Light deformation hydraulic control cylinder, also effectively ensured the safety of work progress simultaneously.In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of foundation ditch axial force of the supports following control system, comprise hydraulic cylinder, supporting seat, two bracing frames, push rod, two pieces of latch segments and two self-locking oil cylinders, described push rod is fixedly connected with piston rod one end of described hydraulic cylinder by bolt, described supporting seat to be sheathed on outside described push rod and between described hydraulic cylinder and described latch segment, described supporting seat is fixedly connected with described hydraulic cylinder by bolt, described two bracing frames to be symmetricly set in outside supporting seat and to be fixedly connected with described supporting seat, described two pieces of latch segments to be positioned on described supporting seat and to be symmetricly set in outside described push rod, one end of described two self-locking oil cylinders is all connected with support frame as described above pin, the other end of described two self-locking oil cylinders is all connected with described latch segment pin.
Optionally, pressure sensor and position sensor is provided with in described hydraulic cylinder.
Optionally, described latch segment clear width arranges some guide grooves, and on described push rod, interval arranges some annular snap teeth, and described guide groove and described card tooth engage each other.
Optionally, the thread form angle of described guide groove or perhaps described card tooth is 10 °-16 °
Optionally, the oily two ends of described locking are all provided with connecting lug.
Optionally, also comprise PLC control unit and three two-position four-way solenoid valves and a three-position four-way electromagnetic directional valve, wherein, two two-position four-way solenoid valves are arranged on the entering of described two self-locking oil cylinders, oil return line respectively, another two-position four-way solenoid valve is arranged on the entering of described hydraulic cylinder, oil return line, described three-position four-way electromagnetic directional valve is arranged on described total oil-feed oil circuit and total oil return circuit, and described PLC control unit is connected with described three two-position four-way solenoid valves and described three-position four-way electromagnetic directional valve signal respectively.
In addition, the present invention also provides a kind of foundation ditch axial force of the supports follow-up control method, comprises the steps:
Step 1: foundation ditch axial force of the supports following control system described in is provided;
Step 2: described foundation ditch axial force of the supports following control system is arranged between bracing of foundation pit wall that steel pipe support and required Light deformation control, described push rod is withstood on the pre-embedded steel slab of described bracing of foundation pit wall;
Step 3: the axle power applying designing requirement to described steel pipe support, and axle power early warning lower limit is set;
Step 4: monitor the change of axle power:
When axle power reaches described axle power early warning lower limit, described self-locking oil cylinder performs retracting action, drives described latch segment to move, opens the mechanical self-latching of described hydraulic cylinder, and described hydraulic cylinder performs oiling instruction, described hydraulic cylinder pressurization;
When axle power is restored to designing requirement axle force value, described self-locking oil cylinder performs extend action, drives described latch segment to move, and the mechanical self-latching of described hydraulic cylinder closes, and locks described Position of Hydraulic Cylinder;
Step 5: foundation pit construction completes, removes described foundation ditch axial force of the supports following control system.
In terms of existing technologies, a kind of foundation ditch axial force of the supports following control system provided by the present invention and method, at least have following useful technique effect:
1, significantly reduce the human cost of foundation pit construction and the labour intensity of workman: described self-locking oil cylinder stretch out retracting action can drive described latch segment close open, realize opening described hydraulic cylinder works state locking, thus avoid need more operator remove manual operation locking nut, significantly reduce human cost, also greatly reduce the labour intensity of operator simultaneously.
2, the safety of foundation pit construction has effectively been ensured: described foundation ditch axial force of the supports following control system can lock the duty of hydraulic cylinder in real time, avoid and serve hidden danger because of the carelessness of people to foundation pit construction band, also ensured the personal safety of operator under foundation pit construction comparatively adverse circumstances simultaneously.
Accompanying drawing explanation
Fig. 1 is the application scenario schematic diagram of the foundation ditch axial force of the supports following control system of one embodiment of the invention;
Fig. 2 is the foundation ditch axial force of the supports following control system structural representation of one embodiment of the invention;
Fig. 3 is the top view of Fig. 2;
Fig. 4 is the flow chart of the foundation ditch axial force of the supports follow-up control method of one embodiment of the invention.
Fig. 5 is the hydraulic schematic diagram of the foundation ditch axial force of the supports following control system of one embodiment of the invention
Detailed description of the invention
The foundation ditch axial force of the supports following control system proposed the present invention below in conjunction with accompanying drawing and instantiation and method are described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.
With reference to figure 1, present embodiment discloses a kind of foundation ditch axial force of the supports following control system 100, be arranged at one end of steel pipe support 200, for supporting foundation pit wall 300, in the present embodiment, described enclosure wall 300 is close to and runs subway line 400.
Composition graphs 1 to Fig. 3, the foundation ditch axial force of the supports following control system 100 of one embodiment of the invention, comprises hydraulic cylinder 1, supporting seat 2, two bracing frames 3, push rod 6, two pieces of latch segments 5 and two self-locking oil cylinders 4.Push rod 6 is fixedly connected with the terminal bolt of piston rod in hydraulic cylinder 1 away from piston, supporting seat 2 is set in the outside of push rod 6, supporting seat 2 is fixedly connected with hydraulic cylinder 1 by bolt, push rod 6 with piston rod in hydraulic cylinder 1 stretch out be retracted in supporting seat 2 and do rectilinear motion, realize the Deformation control to supporting foundation pit wall 300; Two pieces of latch segments 5 to be positioned on supporting seat 2 and to be symmetricly set on the outside of push rod 6, and two pieces of latch segments 5 are semicircular ring structure; Two bracing frames 3 are symmetricly set in the outside of supporting seat 2, and bracing frame 3 is for being symmetrically welded formula steel work, and each bracing frame 3 comprises 4 supporting legs, and bracing frame 3 is fixedly connected with supporting seat 2 by 4 supporting legs; Two self-locking oil cylinders 4 are separately positioned on bracing frame 3, and each self-locking oil cylinder 4 one end is all sold with bracing frame 3 and is connected, and the other end of each self-locking oil cylinder 4 is all sold with latch segment 5 and is connected; Two self-locking oil cylinders 4 share same fuel feeding oil return circuit, each self-locking oil cylinder inner cylinder 4 is consistent, ensures the close look at the swing of two self-locking oil cylinders 4.The piston rod of self-locking oil cylinder 4 stretch out retraction drive two latch segment 5 in opposite directions movement on the contrary, latch segment 5 lock unclamp push rod 6, thus realize locking unclamp the duty of hydraulic cylinder 1.
Continue composition graphs 2, Fig. 3 and Fig. 5, pressure sensor 19 and position sensor 20 is also provided with in hydraulic cylinder 1, pressure sensor 19 can monitor the pressure size in hydraulic cylinder, realize the monitoring to steel pipe support 200 axle power, position sensor 20 can monitor the position of piston rod in hydraulic cylinder 1, further the duty of monitoring hydraulic cylinder 1.
Continue composition graphs 2 and Fig. 3, all some card teeth and guide groove are set at interval in the outside of the inner side of latch segment 5 and push rod 6, the thread form angle of card tooth and guide groove is 10 °-16 °, two pieces of latch segments 5 move at the drive Xia Xiang center of self-locking oil cylinder 4 to be drawn close, in latch segment 5, the tooth of draw-in groove tooth extend in the groove of guide groove in push rod 6, form several intermeshing card tooth and guide grooves, the support reaction of bracing of foundation pit wall 300 pairs of push rods 6 passes to latch segment 5 by several intermeshing card teeth and guide groove, it is passed to supporting seat 2 by latch segment 5 again, finally pass to hydraulic cylinder 1, thus realize the position locking push rod 6 when hydraulic cylinder 1 breaks down.Meanwhile, utilize inclined-plane self-lock mechanism, the thread form angle of latch segment 5 guide groove and push rod 6 card tooth is designed to 10 °-16 °, latch segment 5 just can be made can not to skid off because of the axle power suffered by push rod 6 not having the situation of other external force.
Continue composition graphs 2 and Fig. 3, self-locking oil cylinder 4 two ends are all provided with connecting lug, and operationally, two ends connecting lug can rotate around connecting pin self-locking oil cylinder 4 respectively, the automatic deviation correction when position of latch segment 5 can be enable operationally to occur little deviation.
With reference to figure 5, and incorporated by reference to Fig. 1-Fig. 3, described foundation ditch axial force of the supports following control system 100 also comprises PLC control unit 17 and three two-position four-way solenoid valves 12 and a three-position four-way electromagnetic directional valve 14, wherein, a two-position four-way solenoid valve 12 is arranged at entering of hydraulic cylinder 1, on oil return line, another two two-position four-way solenoid valves 12 are arranged at entering of two self-locking oil cylinders 4 respectively, on oil return line, three-position four-way electromagnetic directional valve 14 is arranged on total oil-feed oil circuit and total oil return circuit, PLC control unit 17 is connected with three two-position four-way solenoid valves 12 and three-position four-way electromagnetic directional valve 14 signal respectively.By the control of PLC control unit 17 to three two-position four-way solenoid valves 12 and a three-position four-way electromagnetic directional valve 14, the entering of self-locking oil cylinder 4 and hydraulic cylinder 1, the sequencing of the break-make of oil return line and break-make, the time interval can be realized, thus control the folding of latch segment 5 and the telescopic moving of push rod 6.In addition, foundation ditch axial force of the supports following control system 100 also comprises fuel tank 21, hydro-power pump 15 and proportional pressure control valve 16 etc.Total oil-feed oil circuit is connected with fuel tank 21 respectively with total oil return circuit.One end near fuel tank 21 on total oil-feed oil circuit is provided with hydro-power pump 15, total oil return circuit is provided with proportional pressure control valve 16 near one end of fuel tank 21, and proportional pressure control valve 16 is the proportional pressure control valve of band feedback, according to the pressure feedback of load, setup parameter, thus the constant pressure of the system of guarantee.In proportional pressure control valve 16, hydraulic cylinder 1, pressure sensor 19 and displacement transducer 20 are connected with PLC control unit 17 respectively and pressure information and positional information are fed back to PLC control unit 17.
With reference to figure 4, and incorporated by reference to Fig. 1-Fig. 3 and Fig. 5, foundation ditch axial force of the supports follow-up control method provided by the invention is described, comprises the steps:
Step 1: foundation ditch axial force of the supports following control system 100 is provided.
Step 2: foundation ditch axial force of the supports following control system 100 be arranged between bracing of foundation pit wall 300 that steel pipe support 200 and required Light deformation control, push rod 6 withstands on the pre-embedded steel slab of described bracing of foundation pit wall 300.
Step 3: the axle power applying designing requirement to steel pipe support 200, and axle power early warning lower limit is set.
Apply the axle power of designing requirement to steel pipe support 200 by pressure sensor in hydraulic cylinder 1 and PLC control unit 17, and axle power early warning lower limit is set.
Step 4: monitor the change of axle power:
When axle power reaches axle power early warning lower limit, when axle power lower limit early warning signal is fed back to PLC control unit 17 by pressure sensor 19 in hydraulic cylinder 1, two two-position four-way solenoid valves 12 of PLC control unit 17 to being arranged on that self-locking oil cylinder 4 enters, on oil return line send opens mechanical self-latching instruction, two two-position four-way solenoid valves 12 perform mechanical self-latching instruction, the piston rod retraction of self-locking oil cylinder 4, two latch segments 5 are driven to move in the opposite direction, open the mechanical self-latching of hydraulic cylinder 1, complete and open mechanical self-latching instruction; After PLC control unit 17 sends and opens mechanical self-latching instruction certain hour interval, two-position four-way solenoid valve 12 immediately to being arranged on that hydraulic cylinder 1 enters, on oil return line sends the instruction of injection pressure oil, two-position four-way performs the instruction of injection pressure oil to electromagnetic valve 12, the piston rod of hydraulic cylinder 1 stretches out under the promotion of pressure oil, drive the further top of push rod 6 to the pre-embedded steel slab of bracing of foundation pit wall 300, pressure sensor 19 monitors the pressure change of pressure oil, and position sensor 20 detects the piston rod change in displacement of hydraulic cylinder 1 simultaneously.
When change in displacement is draw-in groove pitch integral multiple and the pressure of oil reaches designing requirement value, the two-position four-way solenoid valve 12 of PLC control unit 17 to being arranged on that hydraulic cylinder 1 enters, on oil return line sends and stops oiling instruction, two-position four-way performs to electromagnetic valve 12 and stops oiling instruction, and system stops to hydraulic cylinder 1 oiling; After PLC control unit 17 sends and stops oiling signal instruction certain hour interval, two two-position four-way solenoid valves 12 of PLC control unit 17 to being arranged on that self-locking oil cylinder 4 enters, on oil return line send closed mechanical self-latching instruction, two two-position four-way solenoid valves 12 perform closed mechanical self-latching instruction, the piston of two self-locking oil cylinders 4 stretches out, two pieces of latch segments 5 are driven to move in opposite directions, latch segment 5 and push rod 6 upper rail and Ka Ya engage each other, and locking push rod 6 position, completes hydraulic cylinder 1 mechanical self-latching.
Step 5: foundation pit construction completes, removes foundation ditch axial force of the supports following control system 100.
In sum, foundation ditch axial force of the supports following control system provided by the invention and method, the duty of described hydraulic cylinder can be locked in real time, the waste of a large amount of manpower financial capacities needing manual operation to cause can be avoided, reduce the labour intensity of operator further; Meanwhile, some hidden dangers that some bring because of human negligence can be eliminated, ensure that security of foundation ditch construction carries out in an orderly manner further.
Foregoing description is only the description to present pre-ferred embodiments, any restriction not to the scope of the invention, and any change that the those of ordinary skill in field of the present invention does according to above-mentioned disclosure, modification, all belong to the protection domain of claims.
Claims (7)
1. a foundation ditch axial force of the supports following control system, it is characterized in that, comprise hydraulic cylinder, supporting seat, two bracing frames, push rod, two pieces of latch segments and two self-locking oil cylinders, described push rod is fixedly connected with piston rod one end of described hydraulic cylinder by bolt, described supporting seat to be sheathed on outside described push rod and between described hydraulic cylinder and described latch segment, described supporting seat is fixedly connected with described hydraulic cylinder by bolt, described two bracing frames to be symmetricly set in outside supporting seat and to be fixedly connected with described supporting seat, described two pieces of latch segments to be positioned on described supporting seat and to be symmetricly set in outside described push rod, one end of described two self-locking oil cylinders is all connected with support frame as described above pin, the other end of described two self-locking oil cylinders is all connected with described latch segment pin.
2. foundation ditch axial force of the supports following control system according to claim 1, is characterized in that, be provided with pressure sensor and position sensor in described hydraulic cylinder.
3. the foundation ditch axial force of the supports following control system according to any one of claim 1-2, it is characterized in that, described latch segment clear width arranges some guide grooves, on described push rod, interval arranges some annular snap teeth, and described guide groove and described card tooth engage each other.
4. foundation ditch axial force of the supports following control system according to claim 3, is characterized in that, the thread form angle of described guide groove or perhaps described card tooth is 10 °-16 °.
5. foundation ditch axial force of the supports following control system according to claim 4, is characterized in that, described two self-locking oil cylinder two ends are all provided with connecting lug.
6. foundation ditch axial force of the supports following control system according to claim 4, it is characterized in that, also comprise PLC control unit and three two-position four-way solenoid valves and a three-position four-way electromagnetic directional valve, wherein, two two-position four-way solenoid valves are arranged at described two self-locking oil cylinders respectively and enter, on oil return line, another two-position four-way solenoid valve is arranged at described hydraulic cylinder and enters, on oil return line, described three-position four-way electromagnetic directional valve is arranged on described total oil-feed oil circuit and total oil return circuit, described PLC control unit is connected with described three two-position four-way solenoid valves and described three-position four-way electromagnetic directional valve signal respectively.
7. a foundation ditch axial force of the supports follow-up control method, is characterized in that, comprises the steps:
Step 1: foundation ditch axial force of the supports following control system according to any one of claim 1-6 is provided;
Step 2: described foundation ditch axial force of the supports following control system is arranged between bracing of foundation pit wall that steel pipe support and required Light deformation control, described push rod is withstood on the pre-embedded steel slab of described bracing of foundation pit wall;
Step 3: the axle power applying designing requirement to described steel pipe support, and axle power early warning lower limit is set;
Step 4: monitor the change of axle power:
When axle power reaches described axle power early warning lower limit, described self-locking oil cylinder performs retracting action, drives described latch segment to move, opens the mechanical self-latching of described hydraulic cylinder, and described hydraulic cylinder performs oiling instruction, described hydraulic cylinder pressurization;
When axle power is restored to designing requirement axle force value, described self-locking oil cylinder performs extend action, drives described latch segment to move, and the mechanical self-latching of described hydraulic cylinder closes, and locks described Position of Hydraulic Cylinder;
Step 5: foundation pit construction completes, removes described foundation ditch axial force of the supports following control system.
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| CN201510117614.2A CN104762976B (en) | 2015-03-18 | 2015-03-18 | Foundation ditch axial force of the supports following control system and method |
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| CN201510117614.2A CN104762976B (en) | 2015-03-18 | 2015-03-18 | Foundation ditch axial force of the supports following control system and method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105804081A (en) * | 2016-03-07 | 2016-07-27 | 彭宝安 | Device for pulling out and pressing in horizontal small grouting guide pipe at narrow site |
| CN108088410A (en) * | 2017-12-26 | 2018-05-29 | 上海建工集团股份有限公司 | Underground enclosure wall integration deformation monitoring system and monitoring method |
| CN108239994A (en) * | 2017-12-29 | 2018-07-03 | 上海建工集团股份有限公司 | A kind of temporary support system and its application method |
| CN108252980A (en) * | 2017-12-25 | 2018-07-06 | 上海建工集团股份有限公司 | A kind of foundation pit deformation Precise control device and control method |
| CN108252309A (en) * | 2018-02-11 | 2018-07-06 | 中铁局集团厦门建设工程有限公司 | A kind of easy mounted-dismounted type pattern foundation pit supporting structure mechanism |
| CN109974913A (en) * | 2019-04-16 | 2019-07-05 | 上海宏信设备工程有限公司 | A kind of automatic measurement axle power, the devices and methods therefor for adjusting axle power |
| CN110821922A (en) * | 2019-11-14 | 2020-02-21 | 江苏万川液压机械设备有限公司 | Sensitive servo monitoring compensation system for foundation pit horizontal supporting axial force and displacement load |
| CN112482448A (en) * | 2020-11-18 | 2021-03-12 | 国网山东省电力公司泰安供电公司 | Foundation pit hydraulic support monitoring mechanism |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804081A (en) * | 2016-03-07 | 2016-07-27 | 彭宝安 | Device for pulling out and pressing in horizontal small grouting guide pipe at narrow site |
| CN105804081B (en) * | 2016-03-07 | 2017-06-30 | 青岛蓝天创先科技服务有限公司 | The device of horizontal grouting ductule is extracted and be pressed into a kind of narrow and small place |
| CN108252980A (en) * | 2017-12-25 | 2018-07-06 | 上海建工集团股份有限公司 | A kind of foundation pit deformation Precise control device and control method |
| CN108252980B (en) * | 2017-12-25 | 2021-09-21 | 上海建工集团股份有限公司 | Foundation pit deformation fine control device and control method |
| CN108088410A (en) * | 2017-12-26 | 2018-05-29 | 上海建工集团股份有限公司 | Underground enclosure wall integration deformation monitoring system and monitoring method |
| CN108239994A (en) * | 2017-12-29 | 2018-07-03 | 上海建工集团股份有限公司 | A kind of temporary support system and its application method |
| CN108252309A (en) * | 2018-02-11 | 2018-07-06 | 中铁局集团厦门建设工程有限公司 | A kind of easy mounted-dismounted type pattern foundation pit supporting structure mechanism |
| CN108252309B (en) * | 2018-02-11 | 2024-04-09 | 中铁一局集团厦门建设工程有限公司 | Easily-assembled foundation pit supporting mechanism |
| CN109974913A (en) * | 2019-04-16 | 2019-07-05 | 上海宏信设备工程有限公司 | A kind of automatic measurement axle power, the devices and methods therefor for adjusting axle power |
| CN110821922A (en) * | 2019-11-14 | 2020-02-21 | 江苏万川液压机械设备有限公司 | Sensitive servo monitoring compensation system for foundation pit horizontal supporting axial force and displacement load |
| CN110821922B (en) * | 2019-11-14 | 2020-10-30 | 江苏万川液压机械设备有限公司 | Sensitive servo monitoring compensation system for foundation pit horizontal supporting axial force and displacement load |
| CN112482448A (en) * | 2020-11-18 | 2021-03-12 | 国网山东省电力公司泰安供电公司 | Foundation pit hydraulic support monitoring mechanism |
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