CN114382014B - Large-span variable-height truss type steel girder construction process - Google Patents
Large-span variable-height truss type steel girder construction process Download PDFInfo
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- CN114382014B CN114382014B CN202210236879.4A CN202210236879A CN114382014B CN 114382014 B CN114382014 B CN 114382014B CN 202210236879 A CN202210236879 A CN 202210236879A CN 114382014 B CN114382014 B CN 114382014B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 title claims description 43
- 239000010959 steel Substances 0.000 title claims description 43
- 238000007789 sealing Methods 0.000 claims description 55
- 229920001971 elastomer Polymers 0.000 claims description 28
- 238000013016 damping Methods 0.000 claims description 27
- 229920001875 Ebonite Polymers 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 14
- 238000001125 extrusion Methods 0.000 claims description 11
- 230000035939 shock Effects 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims 1
- 239000004816 latex Substances 0.000 description 6
- 229920000126 latex Polymers 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D6/00—Truss-type bridges
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a large-span variable-height girder construction process, which relates to the girder construction field and comprises a shell, oblique girders, vertical girders, cross beams and lower girders, wherein a second space which is communicated front and back is arranged in the shell, and a fourth space is communicated with the upper side of the second space.
Description
Technical Field
The invention relates to the field of girder steel, in particular to a construction process of a girder steel with a large span and variable height.
Background
Truss type steel beams are also known as continuous steel trusses; the variable-height girder steel refers to a continuous steel girder with an upper chord being variable in height, and is also called a variable-height steel girder or an upper chord variable-height steel girder. At present, the construction method for erecting and assembling the steel truss girder mainly comprises a bracket method and a cantilever assembling method of a bridge girder erection machine, the structural strength of the connecting joint of the steel girder is unstable at present in the assembling process, vibration generated when the vehicle flow is large easily causes the position of each connecting girder at the connecting joint of the steel girder to deviate, so that the position of the fixed connecting joint of the truss girder is loosened, the supporting strength of the whole truss girder is reduced, the stress bearing performance of the structure is greatly influenced, meanwhile, the shock absorption performance at the connecting joint is insufficient, when shaking or heavy object impact occurs, vibration cannot be effectively reduced, and the supporting structure is damaged due to the excessively strong vibration.
Disclosure of Invention
The invention aims to provide a construction process of a long-span variable-height truss type steel beam, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the construction process of the large-span variable-height truss type steel girder comprises a shell, oblique chord beams, vertical chord beams, cross beams and lower chord beams, wherein a second space which is communicated front and back is arranged in the shell, a fourth space is communicated with the upper side of the second space, damping spaces are respectively arranged at the left side and the right side of the fourth space, damping mechanisms for protecting nodes of the steel girder main truss are respectively arranged in the damping spaces, third spaces are respectively arranged at the left side and the right side of the second space, the two third spaces are symmetrically distributed on the center line of the fourth space, a first space is arranged at the lower side of the two third spaces, a abutting mechanism for shock absorption protection is arranged in the fixed connection position of the lower chord beams, the cross beams, the vertical chord beams and the two oblique chord beams, each damping mechanism respectively comprises a damping shell fixedly arranged in each damping space, a sealing space is respectively arranged in each damping shell, each sealing space is respectively provided with a sealing block, each sealing block is correspondingly arranged between each sealing space and each sealing block is correspondingly arranged at the left side of the sealing block and the sealing block, each sealing block is correspondingly arranged in the sealing block is correspondingly far away from the center line of the inner cavity, each sealing block is correspondingly connected with the sealing block is correspondingly arranged in the sealing block, each sealing block is correspondingly connected with the sealing block, and each sealing block is correspondingly provided with the sealing block is respectively, and each sealing block is respectively the sealing block, each air bag inner cavity is close to the corresponding side wall in the central line direction of the sealing space, a driving air bag is respectively and fixedly arranged on the side wall in the central line direction of the sealing space, each driving air bag sliding telescopic end is respectively and fixedly provided with a driving push rod, and each driving push rod penetrates through the corresponding flexible rubber block and the protecting shell respectively and is in sliding connection with the flexible rubber block and the protecting shell.
Each control assembly comprises an air inlet funnel arranged on the upper side of each sealing space, the end face of each air inlet funnel opening is flush with the outer end face of the shell, the end face of each air inlet funnel opening is horn-shaped and fixedly provided with a filter screen, each air inlet funnel is close to the direction end of each sealing space and penetrates through the corresponding sealing space respectively and fixedly provided with a hard rubber block, the upper side wall of the second space is connected with two fixed sliding rods in a sliding mode respectively, the lower end face of each fixed sliding rod is fixedly provided with an L-shaped baffle, the upper end face of each fixed sliding rod penetrates through the corresponding sealing space respectively, the upper end face of each fixed sliding rod is fixedly provided with a hard rubber block respectively, the left side wall of each sealing space is communicated with the corresponding driving air bag air inlet respectively, and the right side wall of each sealing space is communicated with the corresponding driving air bag air inlet respectively and provided with a second pipeline.
Each blocking assembly comprises a first inner cavity arranged in each protection shell, each first inner cavity is respectively and slidably connected with a fixed sliding plate, each fixed sliding plate is respectively and correspondingly fixedly connected with a driving push rod, two return springs are connected between each fixed sliding plate and corresponding side walls of the first inner cavity, seven extrusion push rods are respectively and equidistantly distributed and fixedly arranged on one side, away from the corresponding side, of the central line of the sealing space, of each first inner cavity, seven smooth inner cavities are respectively arranged on one side, away from the corresponding side, of the central line of the sealing space, communication spaces are respectively arranged between the corresponding seven smooth inner cavities, each extrusion push rod respectively and slidably penetrates into the corresponding smooth inner cavity, a circular arc baffle is respectively and fixedly arranged on each extrusion push rod, a flexible latex block is respectively arranged in each smooth inner cavity, one side, away from the central line of the corresponding sealing space, of each communication space is respectively provided with an open clamp block space, each clamp block is respectively and slidably connected with seven extrusion push rods, each clamp block is respectively arranged in the directions close to the corresponding side walls of the sealing space, and is respectively communicated with each shock-absorbing column.
Preferably, the abutting mechanism comprises four baffle sliding columns which are installed on the rear side wall of the first space in a sliding connection mode, each baffle sliding column slides back and forth between the shell, the front end faces of the two baffle sliding columns corresponding to the left side and the right side are fixedly connected with fan-shaped baffles, compression springs are sleeved on the baffle sliding columns respectively, and the front end faces of the fan-shaped baffles are provided with corrugated bulges respectively.
Preferably, the end face of the lower side of the shell is fixedly provided with a composite rubber layer, the lower side of the shell is provided with two bilaterally symmetrical threaded holes and penetrates through the composite rubber layer, so that after the shell is installed, the shell is fixed on the lower chord beam through bolts, the locking force generated by the bolts can enable the composite rubber layer to be tightly attached to the contact position of the shell and the lower chord beam, and the problem that the vibration transmission efficiency between the shell and the lower chord beam is too high when the locking force is too large is avoided, so that the connection strength is affected.
Preferably, each hard rubber block is semi-elliptic, each hard rubber block located on the lower end face of the air inlet funnel is hollow, so that the L-shaped baffle plate is enabled to slide upwards when being abutted to the cross beam, each fixed sliding rod is enabled to be located on the upper end face of the fixed sliding rod and tightly abutted to the hard rubber block located on the lower end face of the air inlet funnel, when the cross beam vibrates, the fixed sliding rod follows shaking, and accordingly the corresponding hard rubber blocks are enabled to deviate, air flow entering into the air inlet funnel is enabled to enter into the corresponding driving air bag, accordingly whether the air flow enters into the second pipeline or the first pipeline is controlled according to vibration deflection, vibration reduction protection is enabled to be conducted on the steel beam through the corresponding vibration reduction mechanism, and stability of the steel beam is greatly improved.
Preferably, each shock-absorbing block is provided with a saw-tooth friction plate on the end face of the corresponding pushing column in the direction away from the corresponding pushing column, and the saw-tooth directions are biased towards the center line direction of the shell.
Preferably, each elastic rubber block surrounds the corresponding pushing column respectively, and is tightly attached to the outer end face of the corresponding pushing column.
Preferably, gaps generated between the inner side walls of the damping space and the inner side walls of the corresponding damping space are filled with high polymer fillers, and anti-seismic balls are distributed in each high polymer filler at equal intervals.
In summary, the invention has the beneficial effects that:
1. according to the invention, the shock-resistant protection is carried out at the connecting node of the girder, the shock-absorbing block is tightly abutted against the end face of the girder by utilizing the air flow generated by passing vehicles, so that the girder is tightly pressed by utilizing the sawtooth friction plate on the shock-absorbing block, and the problem that the fixing connecting node of the girder is loosened due to the fact that the positions of all connecting girders are deviated due to the shock of the girder generated by the vehicles in the passing process is avoided, and the supporting strength of the whole girder is reduced.
2. According to the invention, the air flow entering the second pipeline or the first pipeline is controlled according to the vibration deflection generated by the vehicle on the steel beam, so that the air flow entering from the side with larger vibration direction is more, the stable fixing force is stronger, meanwhile, the air flow generated in the running process of the vehicle is fixed, the vibration generated when the vehicle flow is larger is also larger, and the wind force is also larger, so that the fixing force is also larger, and the stability of the steel beam is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the whole construction process of a large-span variable-height girder steel in accordance with the present invention;
FIG. 2 is a schematic diagram of the overall cross-sectional structure of the part housing 10 of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the structure of the present invention shown in partial cross-section at A-A in FIG. 2;
FIG. 4 is a schematic view of a partially enlarged structure of the present invention at B in FIG. 2;
Fig. 5 is a schematic view of a partial enlarged structure at C in fig. 4 according to the present invention.
The index marks in the drawings are as follows: 10. a housing; 11. a composite rubber layer; 12. a first space; 13. a fan-shaped baffle; 14. a second space; 15. a third space; 16. an L-shaped baffle; 17. a fourth space; 18. damping space; 19. fixing the slide bar; 20. a high polymer filler; 21. a shock absorbing housing; 22. protecting the inner cavity; 23. a flexible rubber block; 24. a protective housing; 25. a first lumen; 26. driving the air bag; 27. driving the push rod; 28. an air bag inner cavity; 29. fixing the sliding plate; 30. extruding the push rod; 31. a first pipe; 32. a hard rubber block; 33. sealing the space; 34. an air inlet funnel; 35. a filter screen; 36. a second pipe; 37. a smooth inner cavity; 38. a circular arc baffle; 39. a flexible latex block; 40. a communicating space; 41. arc blocks; 42. pushing a column; 43. a clamp block space; 44. an elastic rubber block; 45. a damper block; 46. a baffle strut; 101. a diagonal beam; 102. a vertical chord beam; 103. a cross beam; 104. and a lower chord beam.
Detailed Description
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
The invention will now be described in detail with reference to fig. 1-5, wherein for convenience of description, the orientations described below are now defined as follows: the vertical, horizontal, vertical, front-to-back directions described below are the same as the vertical, horizontal, vertical, and horizontal directions of the view of fig. 1. Fig. 1 is a front view of the device of the present invention, and the direction of fig. 1 is the same as the vertical, horizontal, vertical, front-to-back, horizontal, and horizontal directions of the device of the present invention.
Referring to fig. 1-5, an embodiment of the present invention is provided: the large-span height-variable truss type steel girder construction process comprises a shell 10, oblique girders 101, vertical girders 102, cross beams 103 and lower girders 104, wherein a second space 14 which is communicated front and back is arranged in the shell 10, a fourth space 17 is arranged on the upper side of the second space 14 in a communicating mode, damping mechanisms 501 used for protecting main girder nodes of the steel girders are respectively arranged on the left side and the right side of the fourth space 17, third spaces 15 are respectively arranged on the left side and the right side of the second space 14, two third spaces 15 are distributed in bilateral symmetry about the center line of the fourth space 17, a first space 12 is arranged on the lower girders 104, the cross beams 103 and the vertical girders 102 and two oblique girders 101 are fixedly connected with each other, and abutting mechanisms 502 used for shock absorption protection are arranged in the first space 12.
Each damping mechanism 501 comprises a damping shell 21 fixedly installed in each damping space 18, a sealing space 33 is respectively arranged in each damping shell 21, a control component 503 is respectively arranged between each sealing space 33 and each second space 14, air bag inner cavities 28 are respectively arranged on the left side and the right side of the central line of each sealing space 33, a protection inner cavity 22 is respectively communicated with one side of each air bag inner cavity 28, which is far away from the corresponding central line direction of the sealing space 33, flexible rubber blocks 23 are respectively fixedly arranged on the side walls, which are close to the corresponding central line direction of the sealing space 33, of each protection inner cavity 22, each protection shell 24 is respectively connected with a protection shell 24 in a sliding manner, which is far away from the corresponding central line direction of the sealing space 33, each protection shell 24 respectively penetrates into the corresponding third space 15 and fourth space 17, a blocking component 504 for blocking the dislocation of girder steel support beams is respectively arranged in each protection shell 24, each air bag inner cavity 28 is respectively communicated with one side wall, which is close to the corresponding central line direction of the sealing space 33, each protection inner cavity 28 is fixedly provided with a flexible rubber block 23, each driving air bag block 26 is fixedly arranged on the side wall, which is close to the central line direction of the corresponding air bag 33, and each driving end 27 is respectively connected with the flexible rubber block 23, and the flexible driving end is respectively connected with the flexible rubber block 23.
Each control component 503 includes the air intake funnel 34 that sets up in every the sealed space 33 upside, every air intake funnel 34 opening terminal surface respectively with the outer terminal surface of casing 10 flushes, every air intake funnel 34 opening end is loudspeaker form respectively and has set firmly filter screen 35, every air intake funnel 34 is close to sealed space 33 direction end is run through respectively and is got into corresponding in the sealed space 33 and has set firmly hard rubber piece 32, the upper lateral wall of second space 14 sliding connection has two fixed slide bars 19 respectively, every fixed slide bar 19 lower terminal surface has set firmly L shape baffle 16 respectively, every fixed slide bar 19 up end runs through respectively and gets into corresponding in the sealed space 33, every fixed slide bar 19 up end has set firmly respectively hard rubber piece 32, every sealed space 33 left side wall respectively with the correspondence between the drive gasbag 26 air inlet intercommunication be provided with first pipeline 31, every sealed space 33 right side wall respectively with the correspondence between the drive gasbag 26 air inlet intercommunication be provided with second pipeline 36.
In addition, in one embodiment, each blocking component 504 includes a first inner cavity 25 disposed in each protection shell 24, a fixed slide plate 29 is slidably connected in each first inner cavity 25, each fixed slide plate 29 is fixedly connected with the corresponding driving push rod 27, two return springs are connected between each fixed slide plate 29 and the corresponding side wall of the first inner cavity 25, seven extrusion push rods 30 are equidistantly distributed and fixed on the end surface of each fixed slide plate 29 in the direction away from the central line of the corresponding sealing space 33, seven smooth inner cavities 37 are disposed on one side of each first inner cavity 25 in the direction away from the central line of the corresponding sealing space 33, a communication space 40 is disposed in communication between the corresponding seven smooth inner cavities 37, each extrusion push rod 30 is slidably penetrated into the corresponding smooth inner cavity 37, a circular arc-shaped baffle 38 is fixedly disposed on each extrusion push rod 30, a flexible latex block 39 is disposed in the corresponding seven smooth inner cavities 37, each of the communication space blocks 40 is disposed in a manner of being close to the corresponding side of the sealing space 33, a vibration absorbing column 45 is disposed in communication with each compression column 45 in a direction away from the corresponding sealing space 42, a vibration absorbing column 45 is disposed in communication with each compression column 45, a vibration column 42 is disposed in communication with each compression column 45, an elastic rubber block 44 is fixedly connected between the end face of each shock absorption block 45, which is close to the direction of the communication space 40, and the side wall of the corresponding clamping block space 43, which is close to the direction of the communication space 40.
In addition, in one embodiment, the abutting mechanism 502 includes four baffle posts 46 slidably mounted on the rear side wall of the first space 12, each baffle post 46 slides back and forth between the housing 10, the front end surfaces of the two corresponding baffle posts 46 on the left and right sides are fixedly connected with sector baffles 13, compression springs are respectively sleeved on each baffle post 46, and the front end surfaces of each sector baffle 13 are respectively provided with corrugated protrusions.
In addition, in one embodiment, the end surface of the lower side of the casing 10 is fixedly provided with the composite rubber layer 11, and two bilaterally symmetrical threaded holes are formed in the lower side of the casing 10 and penetrate through the composite rubber layer 11, so that when the casing 10 is mounted and then is fixed on the lower chord beam 104 through bolts, the locking force generated by the bolts can enable the composite rubber layer 11 to be tightly attached to the contact position of the casing 10 and the lower chord beam 104, and therefore the problem that when the locking force is too large, the vibration transmission efficiency between the casing 10 and the lower chord beam 104 is too high, and the connection strength is affected is avoided.
In addition, in one embodiment, each hard rubber block 32 is in a semi-elliptical sphere shape, each hard rubber block 32 located at the lower end surface of the air inlet funnel 34 is hollow, so that when the L-shaped baffle 16 is abutted to the cross beam 103, each fixed slide rod 19 slides upwards, so that each hard rubber block 32 located at the upper end surface of the fixed slide rod 19 is tightly abutted to the hard rubber block 32 located at the lower end surface of the air inlet funnel 34, when the cross beam 103 vibrates, the fixed slide rod 19 follows the vibration, so that the corresponding hard rubber block 32 deflects, and the air flow entering in the air inlet funnel 34 enters the corresponding driving air bag 26, so that the air flow enters the second pipeline 36 or the first pipeline 31 is controlled according to the vibration deflection, the corresponding shock absorption mechanism 501 can absorb and protect the steel beam, and the stability of the steel beam is greatly improved.
In addition, in one embodiment, each shock-absorbing block 45 is provided with a saw-tooth friction plate on the end surface of the corresponding push rod 42 in the direction away from the corresponding push rod, and the saw-tooth directions are biased toward the center line of the housing 10.
In addition, in one embodiment, each elastic rubber block 44 surrounds the corresponding pushing post 42, and is closely attached to the outer end surface of the corresponding pushing post 42.
In addition, in one embodiment, gaps generated between the inner side walls of each damping space 18 and the inner side walls of the corresponding damping space 18 are filled with high polymer fillers 20, and anti-seismic balls are respectively and equidistantly distributed in each high polymer filler 20.
When the device is installed at the truss type steel beam connecting joint, each fixed slide rod 19 slides upwards, so that each hard rubber block 32 positioned on the upper end surface of each fixed slide rod 19 is tightly abutted against each hard rubber block 32 positioned on the lower end surface of each air inlet funnel 34, each protection shell 24 is respectively extruded towards the direction close to the corresponding flexible rubber block 23, so as to be wrapped by the corresponding flexible rubber block 23, each flexible latex block 39 is respectively abutted against and extruded to the corresponding steel beam end surface, so that the corresponding flexible latex block 39 deforms to be filled towards the direction close to the flexible rubber block 23, so as to be abutted against the corresponding circular arc baffle 38, so that the corresponding communication space 40 is filled, so as to be abutted against and extruded to the corresponding circular arc block 41, so as to push the corresponding shock absorption block 45 to be abutted against the steel beam end surface, at this time, when a vehicle passes through the bridge, the wind flow carried by the vehicle passes through the filter screen 35 and enters the air inlet funnel 34, and when the cross beam 103 vibrates during the running of the vehicle, the fixed slide bar 19 follows the vibration, so that the corresponding hard rubber block 32 is offset, the hard rubber block 32 at the lower end surface of the air inlet funnel 34 is dislocated, the air flow entering the air inlet funnel 34 enters the corresponding driving air bag 26, the driving air bag 26 expands and stretches, the corresponding fixed slide plate 29 is pushed to slide away from the direction of the corresponding flexible rubber block 23, the corresponding circular arc baffle 38 presses the flexible rubber block 39 pressed against the smooth inner cavity 37 again, thereby make be full of more in the intercommunication space 40 flexible latex piece 39, thereby make circular arc piece 41 outside slip more, thereby make corresponding shock-absorbing block 45 tightly with girder steel terminal surface butt, thereby utilize shock-absorbing block 45 compresses tightly the girder steel, avoid vibrations to lead to the girder steel position to take place the skew, thereby make the fixed connection node department of girder steel loosen, lead to whole girder steel's support strength to reduce, can also control the air current according to vibration bias to enter into second pipeline 36 or first pipeline 31 simultaneously, thereby make the more one side of vibrations direction stable fixation power stronger, fix according to the air current that produces in-process of vehicle driving simultaneously, the more the vibrations that produce when the traffic is big are also big simultaneously the wind-force is also big, thereby the fixation power is also big, has improved the stability of girder steel greatly.
The foregoing is merely illustrative of specific embodiments of the invention, and the scope of the invention is not limited thereto, but is intended to cover any variations or alternatives not contemplated by the inventors. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.
Claims (7)
1. The utility model provides a large-span becomes high truss-like girder steel construction technology, includes casing (10), oblique string roof beam (101), perpendicular string roof beam (102), crossbeam (103), lower string roof beam (104), its characterized in that: the utility model discloses a vibration damping device, which is characterized in that a second space (14) which is communicated from front to back is arranged in a shell (10), a fourth space (17) is communicated with the upper side of the second space (14), vibration damping spaces (18) are respectively arranged at the left side and the right side of the fourth space (17), a vibration damping mechanism (501) which is used for protecting a girder main girder node is respectively arranged in each vibration damping space (18), third spaces (15) are respectively arranged at the left side and the right side of the second space (14), the two third spaces (15) are symmetrically distributed on the center line of the fourth space (17), a first space (12) is arranged at the lower side of the third spaces (15), a first space (12) is arranged in the first space (12), a butt joint mechanism (502) which is used for absorbing and protecting a girder main girder node is respectively arranged at the left side and the right side of the fourth space (17), each vibration damping mechanism (501) respectively comprises a third space (15) which is fixedly arranged at the left side and the right side of each vibration damping space (18), a vibration damping component (33) is respectively arranged at the left side and the right side of the fourth space (17), a sealing component (33) is respectively arranged between each vibration damping component (33) and each inner cavity (21) in the shell (21), each air bag inner cavity (28) is far away from the corresponding side wall of the central line direction of the sealing space (33) and is respectively communicated with a protection inner cavity (22), each protection inner cavity (22) is close to the corresponding side wall of the central line direction of the sealing space (33) and is respectively fixedly provided with a flexible rubber block (23), each protection inner cavity (22) is far away from the corresponding side wall of the central line direction of the sealing space (33) and is respectively connected with a protection shell (24) in a sliding manner, each protection shell (24) respectively penetrates into the corresponding third space (15) and fourth space (17), each protection shell (24) is respectively provided with a blocking component (504) for blocking dislocation of a truss type steel girder supporting beam, each air bag inner cavity (28) is close to the corresponding side wall of the central line direction of the sealing space (33) and is respectively fixedly provided with a driving air bag (26), a sliding telescopic end of each driving air bag (26) is respectively fixedly provided with a driving push rod (27), each driving push rod (27) respectively penetrates through the corresponding flexible block (23) and the corresponding protection shell (24), and the driving air bag (27) is connected with the flexible block (24) in a sliding manner.
Each control assembly (503) comprises an air inlet funnel (34) arranged on the upper side of each sealing space (33), the opening end face of each air inlet funnel (34) is flush with the outer end face of the shell (10) respectively, the opening end of each air inlet funnel (34) is horn-shaped and fixedly provided with a filter screen (35), each air inlet funnel (34) is close to the direction end of each sealing space (33) and penetrates into the corresponding sealing space (33) respectively and is fixedly provided with a hard rubber block (32), the upper side wall of the second space (14) is connected with two fixed slide bars (19) in a sliding manner respectively, the lower end face of each fixed slide bar (19) is fixedly provided with an L-shaped baffle (16) respectively, the upper end face of each fixed slide bar (19) penetrates into the corresponding sealing space (33) respectively, the upper end face of each fixed slide bar (19) is fixedly provided with a hard rubber block (32) respectively, the left side wall of each sealing space (33) is communicated with a corresponding driving air inlet pipeline (26) respectively, and the right side wall of each driving space (26) is communicated with a corresponding air inlet pipeline (36);
Each blocking assembly (504) comprises a first inner cavity (25) arranged in each protection shell (24), each first inner cavity (25) is respectively and slidably connected with a fixed slide plate (29), each fixed slide plate (29) is respectively and fixedly connected with a corresponding driving push rod (27), two return springs are respectively and fixedly connected between each fixed slide plate (29) and the corresponding side wall of the first inner cavity (25), seven extrusion push rods (30) are respectively and equidistantly distributed and fixedly arranged on the end face, far away from the central line direction of the corresponding sealing space (33), of each first inner cavity (25), seven smooth inner cavities (37) are respectively arranged on one side, far away from the central line direction of the corresponding sealing space (33), of each corresponding first inner cavity (25), a communication space (40) is communicated between the corresponding seven smooth inner cavities (37), each extrusion push rod (30) respectively and slidably penetrates into the corresponding smooth inner cavity (37), each extrusion push rod (30) is respectively and fixedly provided with seven extrusion push rods (38), each flexible clamp block (39) is respectively provided with a corresponding flexible clamp block (39), and each clamp block (39) is respectively communicated with one side of the flexible clamp blocks (43), every sliding connection has snubber block (45) in clamp splice space (43) respectively, every snubber block (45) is close to communication space (40) direction terminal surface has set firmly respectively and has pushed away post (42), every push away post (42) respectively slip run through get into correspondingly in communication space (40), every push away on post (42) respectively set firmly circular arc piece (41), every snubber block (45) are close to communication space (40) direction terminal surface respectively with corresponding clamp splice space (43) are close to fixedly connected with elastic rubber piece (44) between communication space (40) direction lateral wall.
2. The construction process of the long-span variable-height girder steel according to claim 1, wherein the construction process comprises the following steps of: the abutting mechanism (502) comprises four baffle sliding columns (46) which are installed on the rear side wall of the first space (12) in a sliding connection mode, each baffle sliding column (46) slides back and forth between the shell (10), fan-shaped baffles (13) are fixedly connected to the front end faces of the two baffle sliding columns (46) corresponding to the left side and the right side, compression springs are sleeved on the baffle sliding columns (46) respectively, and corrugated protrusions are arranged on the front end faces of the fan-shaped baffles (13) respectively.
3. The construction process of the long-span variable-height girder steel according to claim 1, wherein the construction process comprises the following steps of: the composite rubber layer (11) is fixedly arranged on the end face of the lower side of the shell (10), and two bilaterally symmetrical threaded holes are formed in the lower side of the shell (10) and penetrate through the composite rubber layer (11).
4. The construction process of the long-span variable-height girder steel according to claim 1, wherein the construction process comprises the following steps of: each hard rubber block (32) is in a semi-elliptic sphere shape, and each hard rubber block (32) positioned on the lower end face of the air inlet funnel (34) is hollow.
5. The construction process of the long-span variable-height girder steel according to claim 1, wherein the construction process comprises the following steps of: and the end face of each shock absorption block (45) far away from the corresponding pushing column (42) is respectively provided with a sawtooth friction plate, and the sawtooth directions are deviated to the central line direction of the shell (10).
6. The construction process of the long-span variable-height girder steel according to claim 1, wherein the construction process comprises the following steps of: each elastic rubber block (44) is respectively sleeved on the corresponding pushing column (42) in a surrounding mode and is tightly attached to the outer end face of the corresponding pushing column (42).
7. The construction process of the long-span variable-height girder steel according to claim 1, wherein the construction process comprises the following steps of: and gaps generated between the inner side walls of each damping space (18) and the inner side walls of the corresponding damping space (18) are filled with high polymer fillers (20), and anti-seismic balls are distributed in each high polymer filler (20) at equal intervals.
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