CN105350457A - Method for falling of steel trough beam in bridge walking type pushing construction - Google Patents
Method for falling of steel trough beam in bridge walking type pushing construction Download PDFInfo
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- CN105350457A CN105350457A CN201510782462.8A CN201510782462A CN105350457A CN 105350457 A CN105350457 A CN 105350457A CN 201510782462 A CN201510782462 A CN 201510782462A CN 105350457 A CN105350457 A CN 105350457A
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- steel
- steel tank
- incremental launching
- pier
- jack
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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
Abstract
The invention discloses a method for falling of a steel trough beam in bridge walking type pushing construction, and relates to the technical field of bridge construction. The method comprises the following steps that walking type pushing equipment is arranged at the top of a cover beam; two pier-side brackets are arranged on the two sides of the cover beam respectively, and are oppositely arranged; after the steel trough beam is pushed to a preset beam falling position, the walking type pushing equipment is started to jack the steel trough beam up, then two steel cushion blocks are arranged on the top faces of the two pier-side brackets respectively, and the steel trough beam is made to fall on the two steel cushion blocks; the walking type pushing equipment is removed, padstone is arranged at the top of the cover beam, and a support is fixedly arranged at the top of the padstone; two vertical jacking jacks are arranged at the tops of the positions, on the two sides of the padstone, of the cover plate respectively and controlled to jack up the steel trough beam, then the steel cushion blocks are removed, the two vertical jacking jacks fall back synchronously, and the steel trough beam falls on the support; and the steel trough beam and the support are fixedly connected, the vertical jacking jacks are removed, the pier-side brackets are demounted, and falling of the beam is completed.
Description
Technical field
The present invention relates to technical field of bridge construction, is specifically that in a kind of bridge walking incremental launching construction, steel tank beam falls the method for beam.
Background technology
At present, increasing Longspan Bridge adopts incremental launching method, after shifting position onto, then carries out falling beam by steel tank back.
Such as publication number is in the patent document of CN103556575A, and the steel box-girder disclosing a kind of Midspan sag trunk line falls beam construction method:
First stage: first adopt walking incremental launching device directly to fall beam 20--40cm, steel box-girder falls within the box bearing beam of incremental launching device beam section; Then, remove incremental launching device upper level slide block and cross sliding clock surrounding counter-force seat, to fall beam 40--60cm with the lift-up device of incremental launching device bottom, steel box-girder drops on drum steel;
Second stage: the incremental launching device adopted the first stage is removed, and sets up three pad piers between bearing pad stone, unidirectional jack placed by pad pier, and unidirectional jack is by steel box-girder jack-up, and oil cylinder is locked; Remove the cantilever beam support of former placement incremental launching device; The permanent bearing of steel box-girder is set up at least three beam pads that fall, and steel box-girder drops on falling in beam pad of support position, and fall beam 8--15cm; Fall beam 10--20cm later at every turn, and fall beam 100cm; Phase III: change unidirectional jack into three-way jack, to fall beam with three-way jack, until put in place.
But there is following defect in said method:
1, due to pinner of first constructing, then walking incremental launching device is arranged on pinner, cause walking incremental launching device fall beam time the depth of beam that falls comparatively large, security risk is higher.
2, because jack is supported between two bearings, and be positioned at below girder steel lateral partitions, cause falling stress and steel box-girder in beam process to design stress difference comparatively large, need that stiffener is increased to steel box-girder and carry out local reinforcement.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide steel tank beam in a kind of bridge walking incremental launching construction to fall the method for beam, decrease the depth of beam that falls during beam, reduce security risk; Meet the local pressure requirement of steel tank beam, do not need to carry out local reinforcement to steel tank beam.
For reaching above object, the technical scheme that the present invention takes is: in a kind of bridge walking incremental launching construction, steel tank beam falls the method for beam, comprises the following steps: after step S1. Coping Construction completes, and installs walking incremental launching device at bent cap top; Meanwhile, a pier-side bracket is installed respectively in bent cap both sides, and two pier-side brackets are oppositely arranged; After step S2. steel tank back shifts default Luo Liang position onto, start walking incremental launching device and steel tank back is risen, then a steel cushion block is set respectively at two pier-side bracket end faces, control walking incremental launching device and steel tank beam is fallen beam on two steel cushion blocks; Step S3. removes walking incremental launching device, arranges pinner at bent cap top, and fixedly mounts a bearing at the top of pinner; Step S4. installs a vertical jack respectively at the bent cap top of pinner both sides, control vertical jack steel tank back is risen, then remove the steel cushion block of pier-side bracket end face, two vertical jacks synchronously fall after rise, and steel tank beam falls beam on bearing; Steel tank beam and bearing are connected and fixed by step S5., remove vertical jack, remove pier-side bracket, complete beam.
On the basis of technique scheme, in step S1, described walking incremental launching device comprises the support platform of rectangular configuration, described two pier-side brackets are arranged along support platform length direction, the corner place of support platform bottom surface is respectively arranged with a vertical jack, the slide plane of a rectangle is equipped with along its length in the middle part of the end face of support platform, the both sides of slide plane width are relatively provided with two transverse directions respectively and adjust jack, slide plane slides and is provided with a slide block, the end face of slide block is installed with a carrier bar, and this carrier bar is arranged along the length direction of support platform, the inside of carrier bar is provided with a pushing tow translation jack along its length, and the top of carrier bar is equipped with rubber cushion blocks.
On the basis of technique scheme, the idiographic flow in described step S2 is: after step S201. steel tank back shifts default Luo Liang position onto, starts the vertical jack of walking incremental launching device, and then is risen by steel tank back by carrier bar; Step S202. arranges a steel cushion block respectively at two pier-side bracket end faces; The vertical jack that step S203. controls walking incremental launching device falls after rise, steel tank beam is fallen beam on the steel cushion block of two pier-side bracket end faces.
On the basis of technique scheme, in described step S4, described vertical jack is disassembled by walking incremental launching device and is obtained.
On the basis of technique scheme, in step S1, the end face of two pier-side brackets is all low than the end face of bearing to be installed.
On the basis of technique scheme, all low than the end face of the bearing to be installed 5cm of end face of two pier-side brackets.
On the basis of technique scheme, in step S2, the top of described steel cushion block is equipped with the first rubber tile.
On the basis of technique scheme, in described step S2, the end face of two steel cushion blocks is all high than the end face of bearing to be installed.
On the basis of technique scheme, in step S4, the push rod upper end of described vertical jack is equipped with the second rubber tile.
On the basis of technique scheme, in described step S3, described steel tank soffit is 120cm apart from the distance of bent cap end face, and the height of pinner is 49cm, and the height of bearing is 51cm, and the height of steel cushion block is 25cm.
Beneficial effect of the present invention is:
1, in the present invention, after Coping Construction completes, pinner and bearing not first being set, but directly at bent cap top, walking incremental launching device being installed, carrying out incremental launching construction to carrying out steel tank beam; With prior art, pinner is first set and again the scheme that walking incremental launching device is arranged on pinner is compared, decrease the height of pinner, and then lower the depth of beam that falls when falling beam, reduce security risk.
2, the present invention is falling in beam process, walking incremental launching device, pier-side bracket and vertical jack are arranged in below steel tank web, and along steel tank beam length direction, there is larger contact area, therefore meet the local pressure requirement of steel tank beam, do not need to carry out local reinforcement to steel tank beam.
3, the present invention is falling in beam process, and steel tank beam temporary support, on the pier-side bracket of pushing tow, does not need the temporary structure increasing other, reduces cost of production.
4, in the present invention, vertical jack is disassembled by walking incremental launching device and is obtained, and therefore, decreases equipment investment, reduces cost of production.
Accompanying drawing explanation
Fig. 1 is that in embodiment of the present invention Bridge walking incremental launching construction, steel tank beam falls the method flow diagram of beam;
Fig. 2 is the particular flow sheet of step S2 in Fig. 1;
Fig. 3 is the Construction State figure of step S2 in Fig. 1;
Fig. 4 is the Construction State figure of step S3 in Fig. 1;
Fig. 5 is the Construction State figure of step S4 in Fig. 1;
Fig. 6 is the Construction State figure of step S5 in Fig. 1;
Fig. 7 is the structural representation of walking incremental launching device in the embodiment of the present invention;
Fig. 8 is the top view of Fig. 7.
Reference numeral:
1-steel tank beam;
2-bent cap; 21-pinner; 22-bearing;
3-pier-side bracket; 31-steel cushion block; 32-first rubber tile;
4-walking incremental launching device; 41-support platform; The vertical jack of 42-; 43-slide plane; 44-laterally adjusts jack; 45-slide block; 46-carrier bar; 47-pushing tow translation jack; 48-rubber cushion blocks; 49-second rubber tile.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Shown in Figure 1, embodiments provide steel tank beam in a kind of bridge walking incremental launching construction and to fall the method for beam, comprise the following steps:
After step S1. bent cap 2 has been constructed, at bent cap 2 top, walking incremental launching device 4 is installed; Meanwhile, bent cap 2 both sides (along bridge to) respectively a pier-side bracket 3 is installed, and two pier-side brackets 3 are symmetrical arranged; Wherein, the end face of two pier-side brackets 3 is all low than the end face of bearing 22 to be installed, facilitates later stage pier-side bracket 3 to be separated with steel tank beam 1.Concrete, all low than the end face of the bearing 22 to be installed 5cm of the end face of two pier-side brackets 3 in the present embodiment.Shown in Fig. 7 and Fig. 8, walking incremental launching device 4 comprises the support platform 41 of rectangular configuration, described two pier-side brackets 3 are arranged along support platform 41 length direction, the corner place of support platform (41) bottom surface is respectively arranged with a vertical jack 42, the slide plane 43 of a rectangle is equipped with along its length in the middle part of the end face of support platform 41, the both sides of slide plane 43 width are arranged with two laterally adjustment jack 44, respectively for carrying out spacing to the movement of carrier bar 46.Slide plane 43 slides and is provided with a slide block 45, the end face of slide block 45 is installed with a carrier bar 46, and this carrier bar 46 is arranged along the length direction of support platform 41; The inside of carrier bar 46 is provided with a pushing tow translation jack 47 along its length, and the top of carrier bar 46 is equipped with rubber cushion blocks 48, makes steel tank beam 1 bottom surface uniform force.
Step S2. is shown in Figure 3, after steel tank beam 1 pushing tow to default Luo Liang position, start walking incremental launching device 4 by steel tank beam 1 jack-up, then arrange a steel cushion block 31 respectively at two pier-side bracket 3 end faces, steel cushion block 31 height is advisable to facilitate pinner 21 and bearing 22 construction; Control walking incremental launching device 4 to fall after rise, steel tank beam 1 is fallen beam on the steel cushion block 31 of two pier-side bracket 3 end faces; The top of steel cushion block 31 is equipped with the first rubber tile 32, makes steel tank beam 1 bottom surface uniform force, and the end face of two steel cushion blocks 31 is all high than the end face of bearing 22 to be installed, facilitates later stage pinner 21 and bearing 22 to construct.
Step S3. is shown in Figure 4, removes walking incremental launching device 4, arranges pinner 21 at bent cap 2 top, after pinner 21 concrete strength reaches design strength, fixedly mounts a bearing 22 at the top of pinner 21; Concrete, steel tank beam 1 bottom surface is 120cm apart from the distance of bent cap 2 end face, the height of pinner 21 is 49cm, the height of bearing 22 is 51cm, and the height of steel cushion block 31 is 25cm, and the depth of beam that falls as seen is only 20cm, with prior art, first arrange pinner again the scheme that walking incremental launching device is arranged on pinner to be compared, decrease the depth of beam that falls during beam, reduce security risk.
Step S4. is shown in Figure 5, at bent cap 2 top of pinner 21 both sides, a vertical jack 42 is installed respectively, control vertical jack 42 by steel tank beam 1 jack-up, then the steel cushion block 31 of pier-side bracket 3 end face is removed, two vertical jacks 42 synchronously fall after rise, and steel tank beam 1 falls beam on bearing 22; Preferably, vertical jack 42 is disassembled by walking incremental launching device 4 and is obtained, and decreases equipment investment, reduces cost of production.The end face (push rod upper end) of vertical jack 42 is equipped with the second rubber tile 49, makes steel tank beam 1 bottom surface uniform force.
Step S5. is shown in Figure 6, steel tank beam 1 and bearing 22 is connected and fixed, removes vertical jack 42, removes pier-side bracket 3, completes beam.
Shown in Figure 2, the idiographic flow in step S2 is:
After step S201. steel tank beam 1 pushing tow to default Luo Liang position, start the vertical jack 42 of walking incremental launching device 4, and then by carrier bar 46 by steel tank beam 1 jack-up.
Step S202. arranges a steel cushion block 31 respectively at two pier-side bracket 3 end faces.
The vertical jack 42 that step S203. controls incremental launching device 4 falls after rise, steel tank beam 1 is fallen beam on the steel cushion block 31 of two pier-side bracket 3 end faces.
The present invention is not limited to above-mentioned embodiment, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this manual belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. in bridge walking incremental launching construction, steel tank beam falls a method for beam, it is characterized in that, comprises the following steps:
After step S1. bent cap (2) has been constructed, at bent cap (2) top, walking incremental launching device (4) is installed; Meanwhile, a pier-side bracket (3) is installed respectively in bent cap (2) both sides, and two pier-side brackets (3) are oppositely arranged;
After step S2. steel tank beam (1) pushing tow to default Luo Liang position, start walking incremental launching device (4) by steel tank beam (1) jack-up, then a steel cushion block (31) is set respectively at two pier-side bracket (3) end faces, controls walking incremental launching device (4) and steel tank beam (1) is fallen beam on two steel cushion blocks (31);
Step S3. removes walking incremental launching device (4), arranges pinner (21) at bent cap (2) top, and fixedly mounts a bearing (22) at the top of pinner (21);
Step S4. installs a vertical jack (42) respectively at bent cap (2) top of pinner (21) both sides, control vertical jack (42) by steel tank beam (1) jack-up, then the steel cushion block (31) of pier-side bracket (3) end face is removed, two vertical jacks (42) are synchronously fallen after rise, and steel tank beam (1) falls beam on bearing (22);
Steel tank beam (1) and bearing (22) are connected and fixed by step S5., remove vertical jack (42), remove pier-side bracket (3), complete beam.
2. in bridge walking incremental launching construction as claimed in claim 1, steel tank beam falls the method for beam, it is characterized in that: in step S1, described walking incremental launching device (4) comprises the support platform (41) of rectangular configuration, described two pier-side brackets (3) are arranged along support platform (41) length direction, the corner place of support platform (41) bottom surface is respectively arranged with a vertical jack (42), the slide plane (43) of a rectangle is equipped with along its length in the middle part of the end face of support platform (41), the both sides of slide plane (43) width are relatively provided with two transverse directions respectively and adjust jack (44), the upper slip of slide plane (43) is provided with a slide block (45), the end face of slide block (45) is installed with a carrier bar (46), and this carrier bar (46) is arranged along the length direction of support platform (41), the inside of carrier bar (46) is provided with a pushing tow translation jack (47) along its length, and the top of carrier bar (46) is equipped with rubber cushion blocks (48).
3. in bridge walking incremental launching construction as claimed in claim 2, steel tank beam falls the method for beam, it is characterized in that: the idiographic flow in described step S2 is:
After step S201. steel tank beam (1) pushing tow to default Luo Liang position, start the vertical jack (42) of walking incremental launching device (4), and then by carrier bar (46) by steel tank beam (1) jack-up;
Step S202. arranges a steel cushion block (31) respectively at two pier-side bracket (3) end faces;
The vertical jack (42) that step S203. controls walking incremental launching device (4) falls after rise, steel tank beam (1) is fallen beam on the steel cushion block (31) of two pier-side bracket (3) end faces.
4. in bridge walking incremental launching construction as claimed in claim 2, steel tank beam falls the method for beam, and it is characterized in that: in described step S4, described vertical jack (42) is disassembled by walking incremental launching device (4) and obtained.
5. in bridge walking incremental launching construction as claimed in claim 1, steel tank beam falls the method for beam, and it is characterized in that: in step S1, the end face of two pier-side brackets (3) is all low than the end face of bearing to be installed (22).
6. in bridge walking incremental launching construction as claimed in claim 5, steel tank beam falls the method for beam, it is characterized in that: all low than the end face of bearing to be installed (22) 5cm of end face of two pier-side brackets (3).
7. in bridge walking incremental launching construction as claimed in claim 1, steel tank beam falls the method for beam, and it is characterized in that: in step S2, the top of described steel cushion block (31) is equipped with the first rubber tile (32).
8. in bridge walking incremental launching construction as claimed in claim 1, steel tank beam falls the method for beam, and it is characterized in that: in described step S2, the end face of two steel cushion blocks (31) is all high than the end face of bearing to be installed (22).
9. in bridge walking incremental launching construction as claimed in claim 1, steel tank beam falls the method for beam, and it is characterized in that: in step S4, the push rod upper end of described vertical jack (42) is equipped with the second rubber tile (49).
10. in the bridge walking incremental launching construction as described in any one of claim 1-9, steel tank beam falls the method for beam, it is characterized in that: in described step S3, described steel tank beam (1) bottom surface is 120cm apart from the distance of bent cap (2) end face, the height of pinner (21) is 49cm, the height of bearing (22) is 51cm, and the height of steel cushion block (31) is 25cm.
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| CN108708294A (en) * | 2018-07-11 | 2018-10-26 | 中铁大桥局集团第六工程有限公司 | Short slipway beam and pushing method for not equal internodes girder truss incremental launching construction |
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| CN107938521A (en) * | 2017-12-27 | 2018-04-20 | 兰州理工大学 | A kind of V-type bridge pier steel bridge folding pushing tow system |
| CN107938521B (en) * | 2017-12-27 | 2024-04-26 | 兰州理工大学 | V-shaped pier rigid frame bridge folding pushing system |
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| CN108978486B (en) * | 2018-09-14 | 2024-01-30 | 苏交科集团股份有限公司 | Automatic beam falling device and construction method thereof |
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| CN109537460B (en) * | 2018-11-30 | 2021-06-22 | 中建五局第三建设有限公司 | High-position beam falling construction method for pushing bridge |
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| CN114346670A (en) * | 2022-01-27 | 2022-04-15 | 中国船舶重工集团公司第七0三研究所无锡分部 | Underframe structure for mounting marine gas turbine and centering mounting method |
| CN114457698A (en) * | 2022-03-21 | 2022-05-10 | 中铁五局集团机械化工程有限责任公司 | Steel box girder circulating grading high-level girder falling method |
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