CN105088959A - Self-adaptation continuous pushing system for steel truss beam joints - Google Patents
Self-adaptation continuous pushing system for steel truss beam joints Download PDFInfo
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- CN105088959A CN105088959A CN201510520329.5A CN201510520329A CN105088959A CN 105088959 A CN105088959 A CN 105088959A CN 201510520329 A CN201510520329 A CN 201510520329A CN 105088959 A CN105088959 A CN 105088959A
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Abstract
The invention discloses a self-adaptation continuous pushing system for steel truss beam joints and belongs to the technical field of bridge foundation construction. The self-adaptation continuous pushing system comprises a pushing device which is arranged on a support beside a pier and is capable of achieving jacking, horizontal moving and deviation rectifying on a steel truss beam. The pushing device comprises a supporting frame and pushing equipment. The supporting frame is located on the support beside the pier. The steel truss beam is supported by the supporting frame. The pushing equipment is arranged in the supporting frame and can achieve jacking, horizontal moving and deviation rectifying on the supporting frame. The support beside the pier is further provided with a retreating device for returning the pushing device. The self-adaptation continuous pushing system is simple in structure and convenient to install and use, the problems that the steel truss beam joints are distributed unevenly, and the positions of the joints are changed continuously along with the construction process are solved, and therefore fast and efficient continuous pushing of the steel truss beam is achieved.
Description
Technical field
The present invention relates to a kind of steel truss girder and push up system continuously, belong to bridge foundation construction technical field, particularly relate to the node self-adapting successively incremeantal launching method system that a kind of thrustor can follow the movement together of steel truss girder node.
Background technology
Incremental launching method is the important construction technology of modern bridge construction.Along with steel purlin bridge application further extensively and the continuous innovation of bridge construction technique, the incremental launching construction mode of steel purlin structural bridge is arisen at the historic moment, thus has had higher requirement to the adaptivity of pushing tow system.Traditional pushing tow system is generally only applicable to continuous box girder, can not meet steel truss girder Node distribution discontinuous, and the feature that node location constantly changes along with work progress.
The overall successively incremeantal launching method hydraulic system of bridge girder steel between more piece is disclosed in Chinese utility model patent manual CN202644409U, it belongs to engineering construction hydraulic pressure facility field, two cover 4 groups, identical oil pumps drive by motor respectively, and the forward and backward jack that two load-sensitive proportioning valves respectively by the forward and backward jack of correspondence are continuous jack assembly provides pressure oil, gear oil pump drives by motor, and be respectively the forward and backward solenoid operated directional valve discharge pressure oil corresponding with the ground tackle steel strand system of forward and backward jack, correspondence controls the clamping of forward and backward jack ground tackle steel strand system or unclamps, sensor is separately positioned on front and back jack, before correspondence, the key position control point of rear jack correlation displacement section is set with control signal, control point signal feedback gives the load-sensitive proportioning valve controlling jack action and the solenoid operated directional valve controlling ground tackle steel strand system, each valve responds respectively, realize incremental launching construction by multipoint jacking to control, the successively incremeantal launching method operation of synchronous shift, although this utility model has multiple spot pushing tow simultaneously, Synchronization Control is advantage accurately, but this utility model can not meet steel truss girder Node distribution discontinuous time incremental launching construction, and this utility model complex structure, when need remote large span realize the incremental launching construction of steel truss girder time, the increase of construction cost and the reduction of efficiency of construction certainly will be caused.
A kind of walking type multi-point jacking-pushing construction method is disclosed in Chinese invention patent manual CN102587281A, which solve the problem of the girder safety moving in the engineering construction such as bridge, grade separation, pop into place, it is characterized in that being provided with and integrate jacking, translation, the thrustor that laterally adjusts, the suitable bridge completing steel box-girder is to, direction across bridge, movement vertical up and down or adjustment; Utilize top, two steps pushing away hocket, integral steel box corbel is risen, then delivery forward; Afterwards steel box-girder is placed in Temporary Piers structure, completes a pushing tow process, then by the pipe bending cylinder contracting cylinder bottom portion in thrustor, carry out next pushing tow operation, circulate with this; Although the method has jacking, pushing tow, reduction, return step, safety and steady, the advantage such as easy to operate, but the method needs arrange multiple Temporary Piers according to thrustor thus complete the pushing tow of integral steel box beam, which adds the cost of construction and consuming time, meanwhile, for node location steel truss girder mechanism pockety, because the Temporary Piers in the method is irremovable, because the method can not meet the incremental launching construction of multistage node steel truss girder pockety.
In Chinese invention patent manual CN101831874B, disclose a kind of multipoint synchronous push construction method for porous large-span continuous steel truss girder, it comprises the following steps: (1) is at the assembled steel truss girder assembly platform in bridge pier place, bank and pushing slide; (2) assembled joint steel truss girder and a nose girder on steel truss girder assembly platform; (3) vertical jack pair steel truss girder is set and carries out support conversion, then successively incremeantal launching method jack, steel strand, liquid electrical integrated control system are installed; (4) operate liquid electrical integrated control system and pushing tow operation is carried out to steel truss girder; (5), after an above-mentioned joint steel truss girder pushing tow end of job, steel truss girder assembly platform continues assembled steel truss girder, carries out pushing tow operation next time, repeat above-mentioned steps cycle operation, complete porous m longspan steel truss girder incremental launching construction.Although this invention achieves the thrusting action of longspan steel truss girder, there is duration short, the advantage such as construction safety, quality are guaranteed simultaneously, but this invention needed designed in advance and lays steel truss girder assembly platform before pushing tow steel truss girder, the construction cost of steel truss girder pushing tow can be increased like this, increase the man power and material spent by pushing tow, and this invention completes pushing tow by the pushing tow jack controlled on multiple bridge pier, thus cannot realize thrustor and change with the node location one of steel truss girder.
Summary of the invention
For the defect that above-mentioned prior art exists, the technical problem to be solved in the present invention is to provide a kind of steel truss girder node self-adapting successively incremeantal launching method system, it not only can meet the incremental launching construction of the discontinuous steel truss girder of Node distribution, can also realize Fast Installation and the use of thrustor simultaneously.
For solving the problems of the technologies described above, present invention employs so a kind of steel truss girder node self-adapting successively incremeantal launching method system, it comprises and to be arranged on pier collateral branch frame and can to realize the thrustor of jacking, translation and correction to steel truss girder; Described thrustor comprises support frame and incremental launching device; Described support frame is positioned on described pier collateral branch frame; Described steel truss girder is by described support frame supports; Described incremental launching device is arranged in described support frame, and can realize jacking, translation and correction to described support frame; Described pier collateral branch frame is also provided with the backspace mechanism in order to be playbacked by thrustor.
In a kind of preferred embodiment of the present invention, described support frame comprises contiguous block, back-up block, cylinder support and joist; Described back-up block and described upper contiguous block affixed; Described back-up block bottom is connected with described joist; The both sides of described back-up block are removably connected with described cylinder support; The lower surface of described upper contiguous block is provided with postive stop baffle.
In a kind of preferred embodiment of the present invention, described incremental launching device comprises vertical lifting body, horizontal incremental launching device and horizontal deviation correction mechanism; Described vertical lifting body is taken and is put in described support frame; Described horizontal pushing tow equipment connection is on described vertical lifting body; Described horizontal incremental launching device is also connected with described horizontal deviation correction mechanism.
In a kind of preferred embodiment of the present invention, described vertical lifting body comprises jacking cylinder and lower support block; Described jacking cylinder is arranged at the bottom of described lower support block; Described jacking cylinder can realize vertical jacking to described lower support block; Described lower support block is taken and is put in described support frame, and is held up by the joist support of described support frame.
In a kind of preferred embodiment of the present invention, described horizontal incremental launching device comprises pipe bending cylinder and pushing tow slide block; Described pushing tow slide block is arranged at above lower support block; Described pipe bending cylinder one end and lower support block affixed, the other end and described pushing tow slide block affixed; Described pushing tow slide block is provided with the longitudinal groove for connecting described horizontal deviation correction mechanism.
In a kind of preferred embodiment of the present invention, described horizontal deviation correction mechanism comprises correction oil cylinder and correction pushing block; Described correction pushing block is arranged in longitudinal groove of pushing tow slide block; The upper surface of described correction pushing block is higher than the upper surface of described pushing tow slide block; The two ends, horizontal left and right of described correction pushing block are provided with described correction oil cylinder; Described correction oil cylinder one end and described pushing tow slide block affixed, the other end and described correction pushing block affixed.
In a kind of preferred embodiment of the present invention, the upper surface of described lower support block is connected with spacing guide pad.
In a kind of preferred embodiment of the present invention, described backspace mechanism comprises backing mechanism and load transfer mechanism.
In a kind of preferred embodiment of the present invention, described load transfer mechanism comprises load transfer beam and jack; Described jack one end and pier collateral branch frame affixed, the other end is connected with described load transfer beam.
In a kind of preferred embodiment of the present invention, described backing mechanism comprises rollback oil cylinder, sliding support, sliding rail; Described sliding rail is arranged in parallel on pier collateral branch frame; On described sliding rail, interval is furnished with multiple pin-and-hole; Described sliding rail is connected with described sliding support; Described rollback oil cylinder one end is connected with described sliding support, and the other end is connected with cylinder support.
The invention has the beneficial effects as follows: structure of the present invention is simple, easy to install, thrustor is set to support frame and incremental launching device Split type structure dexterously, thus achieve thrustor and to carry out steel truss girder in incremental launching construction process to move together with steel truss girder, thus solve the problem that steel truss girder Node distribution is uneven, node location constantly changes with work progress; Achieve the quick playback of thrustor simultaneously by arranging backspace mechanism, thus successively incremeantal launching method can be carried out when not increasing Temporary Piers or other additional aids to steel truss girder.
Accompanying drawing explanation
Fig. 1 is the steel truss girder node self-adapting pushing tow system architecture elevation of the embodiment of the present invention;
Fig. 2 is the steel truss girder node self-adapting pushing tow system architecture lateral view of the embodiment of the present invention;
Fig. 3 is the support frame structure elevation of the pushing tow system of the embodiment of the present invention;
Fig. 4 is the support frame structure lateral view of the pushing tow system of the embodiment of the present invention;
Fig. 5 is the support frame elevation of the embodiment of the present invention;
Fig. 6 is the support frame lateral view of the embodiment of the present invention;
Fig. 7 is the incremental launching device structure elevation of the embodiment of the present invention;
Fig. 8 is the incremental launching device structure top view of the embodiment of the present invention;
Fig. 9 is the incremental launching device structure right view of the embodiment of the present invention;
Figure 10 is the backing mechanism structure elevation of the embodiment of the present invention;
Figure 11 is the backing mechanism structure side view of the embodiment of the present invention;
Figure 12 is the load transfer mechanism structure elevation of the embodiment of the present invention;
Figure 13 is the load transfer mechanism system structure side view of the embodiment of the present invention;
Figure 14 is the incremental launching device of the embodiment of the present invention and the connection elevation of support frame;
Figure 15 is the incremental launching device of the embodiment of the present invention and the connection side view of support frame;
Figure 16 is that the incremental launching device of the embodiment of the present invention is connected elevation with backing mechanism;
In figure: 100-steel truss girder, 200-support frame, 300-incremental launching device, 400-bridge pier, 500-pier collateral branch frame, 600-backing mechanism, 700-load transfer mechanism, the upper contiguous block of 201-, 202-back-up block, 204-cylinder support, 205-joist, 206-postive stop baffle, 301-pipe bending cylinder, 302-pushing tow slide block, 303-jacking cylinder, 304-lower support block, 305-rectifies a deviation oil cylinder, 306-rectifies a deviation pushing block, the spacing guide pad of 307-, 601-rollback oil cylinder, 602-sliding support, 603-limit bolt, 604-sliding rail, 701-load transfer beam, 702-jack.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
From elevation and the lateral view of a kind of steel truss girder node self-adapting successively incremeantal launching method system architecture of Fig. 1 and Fig. 2 embodiment of the present invention, a kind of steel truss girder node self-adapting of the present invention successively incremeantal launching method system comprises support frame 200, incremental launching device 300, backing mechanism 600 and load transfer mechanism 700, support frame 200 is positioned on pier collateral branch frame 500, and support frame 200 is connected with steel truss girder 100; Incremental launching device 300 is arranged in described support frame 200; From support frame structure elevation and the lateral view of the pushing tow system shown in Fig. 3, Fig. 4 and Fig. 5, Fig. 6, support frame 200 comprises contiguous block 201, back-up block 202, cylinder support 204 and joist 205; Upper contiguous block 201 is connected with steel truss girder 100; Back-up block 202 is affixed with upper contiguous block 201; Back-up block 202 is inverted T-shaped, and bottom interval is provided with multiple joist connecting hole; Joist 205 is by being connected on back-up block 202 with the connecting hole of back-up block 202 bottom; The both sides of back-up block 202 are removably connected with cylinder support 204; The lower surface of upper contiguous block 201 is provided with postive stop baffle 206; Incremental launching device 300 is held up by joist 205 and is supported in support frame 200 inside; From the incremental launching device structure three-view diagram of Fig. 7, Fig. 8 and Fig. 9 embodiment of the present invention, incremental launching device 300 is made up of three parts, vertical lifting body respectively, horizontal-top pushing mechanism and horizontal deviation correction mechanism, vertical lifting body is taken and is put in support frame 200, and vertical lifting body can realize the vertical jacking to support frame 200 by its jacking cylinder; Horizontal-top pushing mechanism is connected on vertical lifting body, and horizontal-top pushing mechanism realizes the horizontal pushing tow to support frame 200 by its pipe bending cylinder; Also be connected with horizontal deviation correction mechanism in horizontal-top pushing mechanism, this horizontal deviation correction mechanism can realize the correction of the lateral shift of support frame 200 in pushing tow process by its oil cylinder of rectifying a deviation.In incremental launching device 300, vertical lifting body comprises jacking cylinder 303 and lower support block 304; Jacking cylinder 303 is installed on the bottom of lower support block 304; Jacking cylinder 303 can realize vertical jacking to lower support block 304; Lower support block 304 is taken and is put in support frame 200, and supports picking-up by the joist 205 of support frame 200.Horizontal-top pushing mechanism comprises pipe bending cylinder 301 and pushing tow slide block 302; Pushing tow slide block 302 is arranged at above lower support block 304; Pipe bending cylinder 301 one end and lower support block 304 affixed, the other end and pushing tow slide block 302 affixed; Pushing tow slide block 302 is provided with the longitudinal groove for connecting described horizontal deviation correction mechanism, for the ease of the movement of pushing tow slide block 302, the upper surface of lower support block 304 is connected with spacing guide pad 307.Horizontal deviation correction mechanism comprises correction oil cylinder 305 and correction pushing block 306; Correction pushing block 306 is arranged in longitudinal groove of pushing tow slide block 302; The upper surface of correction pushing block 306 is higher than the upper surface of pushing tow slide block 302; The two ends, horizontal left and right of correction pushing block 306 are provided with correction oil cylinder 305; Correction oil cylinder 305 one end and pushing tow slide block 302 is affixed, and the other end is affixed with pushing block 306 of rectifying a deviation.From the backing mechanism structure elevation shown in Figure 10 and Figure 11 and lateral view, backing mechanism 600 comprises rollback oil cylinder 601, sliding support 602, sliding rail 604; Sliding rail 604 is arranged in parallel in the both sides of thrustor; On sliding rail 604, interval is furnished with multiple pin-and-hole; Sliding rail 604 is connected with described sliding support 602; Rollback oil cylinder 601 one end is connected with sliding support 602, one end is connected with cylinder support 204, sliding support 602 can slide on sliding rail 604, also can lock in orbit by limit bolt 603, sliding rail 604 is placed on pier collateral branch frame 500, the length of sliding rail 604 is greater than steel truss girder 100 1 panel lengths, and track is provided with pin hole at a certain distance.The composition of load transfer mechanism can obtain from Figure 12 and Figure 13, and load transfer mechanism 700 comprises load transfer beam 701 and two jack 702; Jack 702 one end and pier collateral branch frame 500 affixed, the other end is connected with load transfer beam 701.Incremental launching device is placed in support frame by the present invention, the support to steel truss girder is realized by support frame, in conjunction with the motion of vertical lifting body, horizontal-top pushing mechanism and horizontal deviation correction mechanism, reach whole thrustor and follow the object that steel truss girder node moves forward automatically, utilize backing mechanism, incremental launching device and upper strata framework are return initial point from greatest limit position, realizes the reciprocating motion of thrustor in working range.Steel truss girder node self-adapting pushing tow system of the present invention can singly be overlapped or overlap more and be used, to meet the pushing tow of different spans steel truss girder simultaneously.
When using of the present invention, as shown in Figure 14 and Figure 15, during incremental launching device work, jacking cylinder 303 jacking of incremental launching device 300, lower support block 304 departs from joist 205, and correction pushing block 306 contacts the bottom face of the upper contiguous block 201 of support frame 200, jacking cylinder 303 continues jacking, the bottom of the back-up block 202 of support frame 200 departs from pier collateral branch frame 500, and now, steel truss girder 100 is by jack-up; Pipe bending cylinder 301 stretches out, the pushing tow slide block 302 promoting incremental launching device 300 moves, pushing tow slide block 302 is with correction pushing block 306 the vertically moving along steel truss girder be automatically connected on it, follow pushing tow slide block 302 synchronizing moving under the frictional force effect that support frame 200 and steel truss girder 100 produce between the upper surface and the lower surface of upper contiguous block 201 of correction pushing block 306 to walk forward a stroke, in moving process, if horizontal skew occurs steel truss girder in longitudinal movement, the compensation of its transverse positional displacement can be realized by correction oil cylinder 305; After having moved, jacking cylinder 303 has bounced back, the bottom contact pier collateral branch frame 500 of back-up block 202, and correction pushing block 306 departs from upper contiguous block 201, and lower support block 304 contacts joist 205; Pipe bending cylinder 301 bounces back, the inside postive stop baffle 206 of support frame 200 coordinates with the correction pushing block 306 of incremental launching device 300 and contacts, and produce counter-force, the lower support block 304 of incremental launching device 300 is slided on joist 205 and a stroke of walking forward, now, the initial state of next pushing tow circulation is in.So move in circles, by steel truss girder 100 pushed forward interval, now incremental launching device 300 and support frame 200 are in front extreme position.
As shown in figure 16, backing mechanism 600 and load transfer mechanism 700 is utilized incremental launching device 300 and support frame 200 can be return initial point.The jacking cylinder 303 upwards jacking of incremental launching device 300, by steel truss girder 100 jack-up; The jack 702 upwards jacking of load transfer mechanism 700, load transfer beam 701 contacts steel truss girder 100, until load transfer mechanism 700 removes the stressed of incremental launching device 300 completely; Remove support frame 200 and the connection of steel truss girder 100, install the cylinder support 204 of support frame 200, the jacking cylinder 303 of retraction incremental launching device 300, until cylinder support 204 is supported on the sliding rail 604 of backing mechanism 600; Rollback oil cylinder 601 is installed between cylinder support 204 and sliding support 602; Limit bolt 603 is inserted sliding support 602 with sliding rail 604 pin hole, now sliding support 602 is fixed on sliding rail 604; Rollback oil cylinder 601 stretches out, by incremental launching device 300 and support frame 200 rollback stroke; Extract limit bolt 603, rollback oil cylinder 601 bounces back, and sliding support 602 is retracted a stroke along rollback direction, now, is in next retraction stroke initial state; Iterative cycles like this, until incremental launching device 300 and support frame 200 rollback are to initial point.
Remove the cylinder support 204 of support frame, support frame 200 is placed on pier collateral branch frame 500, retraction loads switching mechanism jack 702, until load is all converted to support frame 200; Connection between support frame 200 and steel truss girder 100 is installed; Remove the connection between backing mechanism 600 and cylinder support 204, and backing mechanism 600 is moved to rollback starting point; Now, pushing tow system is in next sections pushing tow initial state.So, by pushing tow process and back off procedure alternate cycles repeatedly, until whole section of steel truss girder pushing tow puts in place.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those of ordinary skill in the art are in the technical scope disclosed by the present invention; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (10)
1. a steel truss girder node self-adapting successively incremeantal launching method system, comprises that to be arranged on pier collateral branch frame (500) upper and can realize the thrustor of jacking, translation and correction to steel truss girder (100); It is characterized in that: described thrustor comprises support frame (200) and incremental launching device (300); Described support frame (200) is positioned on described pier collateral branch frame (500); Described steel truss girder (100) is supported by described support frame (200); Described incremental launching device (300) is arranged in described support frame (200), and can realize jacking, translation and correction to described support frame (200); Described pier collateral branch frame (500) is also provided with the backspace mechanism in order to be playbacked by thrustor.
2. a kind of steel truss girder node self-adapting successively incremeantal launching method system as claimed in claim 1, it is characterized in that: described support frame (200) comprises contiguous block (201), back-up block (202), cylinder support (204) and joist (205); Described back-up block (202) is affixed with described upper contiguous block (201); Described back-up block (202) bottom is connected with described joist (205); The both sides of described back-up block (202) are removably connected with described cylinder support (204); The lower surface of described upper contiguous block (201) is provided with postive stop baffle (206).
3. a kind of steel truss girder node self-adapting successively incremeantal launching method system as claimed in claim 1, is characterized in that: described incremental launching device (300) comprises vertical lifting body, horizontal-top pushing mechanism and horizontal deviation correction mechanism; Described vertical lifting body is taken and is put in described support frame (200); Described horizontal-top pushing mechanism is connected on described vertical lifting body; Described horizontal-top pushing mechanism is also connected with described horizontal deviation correction mechanism.
4. a kind of steel truss girder node self-adapting successively incremeantal launching method system as claimed in claim 3, is characterized in that: described vertical lifting body comprises jacking cylinder (303) and lower support block (304); Described jacking cylinder (303) is arranged at the bottom of described lower support block (304); Described jacking cylinder (303) can realize vertical jacking to described lower support block (304); Described lower support block (304) is taken and is put in described support frame (200), and supports picking-up by the joist (205) of described support frame (200).
5. a kind of steel truss girder node self-adapting successively incremeantal launching method system as claimed in claim 3, is characterized in that: described horizontal-top pushing mechanism comprises pipe bending cylinder (301) and pushing tow slide block (302); Described pushing tow slide block (302) is arranged at lower support block (304) top; Described pipe bending cylinder (301) one end and lower support block (304) affixed, the other end and described pushing tow slide block (302) affixed; Described pushing tow slide block (302) is provided with the longitudinal groove for connecting described horizontal deviation correction mechanism.
6. a kind of steel truss girder node self-adapting successively incremeantal launching method system as claimed in claim 3, is characterized in that: described horizontal deviation correction mechanism comprises correction oil cylinder (305) and correction pushing block (306); Described correction pushing block (306) is arranged in longitudinal groove of pushing tow slide block (302); The upper surface of described correction pushing block (306) is higher than the upper surface of described pushing tow slide block (302); The two ends, horizontal left and right of described correction pushing block (306) are provided with described correction oil cylinder (305); Described correction oil cylinder (305) one end and described pushing tow slide block (302) affixed, the other end and described correction pushing block (306) affixed.
7. a kind of steel truss girder node self-adapting successively incremeantal launching method system as claimed in claim 4, is characterized in that: the upper surface of described lower support block (304) is connected with spacing guide pad (307).
8. a kind of steel truss girder node self-adapting successively incremeantal launching method system as claimed in claim 1, is characterized in that: described backspace mechanism comprises backing mechanism (600) and load transfer mechanism (700).
9. a kind of steel truss girder node self-adapting successively incremeantal launching method system as claimed in claim 8, is characterized in that: described load transfer mechanism (700) comprises load transfer beam (701) and jack (702); Described jack (702) one end and pier collateral branch frame (500) affixed, the other end is connected with described load transfer beam (701).
10. a kind of steel truss girder node self-adapting successively incremeantal launching method system as claimed in claim 8, it is characterized in that: described backing mechanism (600) comprises rollback oil cylinder (601), sliding support (602), sliding rail (604); Described sliding rail (604) is arranged in parallel in pier collateral branch frame (500); The upper interval of described sliding rail (604) is furnished with multiple pin-and-hole; Described sliding rail (604) is connected with described sliding support (602); Described rollback oil cylinder (601) one end is connected with described sliding support (602), and the other end is connected with cylinder support (204).
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| CN201510520329.5A CN105088959B (en) | 2015-08-21 | 2015-08-21 | Self-adaptation continuous pushing system for steel truss beam joints |
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| CN114776031A (en) * | 2022-04-26 | 2022-07-22 | 中铁二十局集团第三工程有限公司 | Deviation rectifying construction control method, device, equipment, system and medium for special-shaped steel structure |
| CN114922093A (en) * | 2022-06-27 | 2022-08-19 | 中建三局第一建设工程有限责任公司 | Walking type pushing system and pushing method for steel truss girder |
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