CN115404782A - Steel box girder jacking and girder falling construction method - Google Patents
Steel box girder jacking and girder falling construction method Download PDFInfo
- Publication number
- CN115404782A CN115404782A CN202211107638.6A CN202211107638A CN115404782A CN 115404782 A CN115404782 A CN 115404782A CN 202211107638 A CN202211107638 A CN 202211107638A CN 115404782 A CN115404782 A CN 115404782A
- Authority
- CN
- China
- Prior art keywords
- steel
- jack
- support
- girder
- jacking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 200
- 239000010959 steel Substances 0.000 title claims abstract description 200
- 238000010276 construction Methods 0.000 title claims abstract description 38
- 239000004575 stone Substances 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000009194 climbing Effects 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 7
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000282472 Canis lupus familiaris Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a steel box girder jacking and girder falling construction method, which comprises the following steps: s1: preparing for construction; s2: arranging a jack; s3: the jack lifts the steel beam upwards, a layer of steel cushion block is additionally arranged on the top of the support, the jack falls back, and a layer of supporting steel plate is additionally arranged on the top of the jack; repeating the operation until the steel beam reaches the designed jacking height; s4: the jack lifts the steel beam upwards, the steel cushion block on the uppermost layer of the support is pulled away, the jack falls back, and the supporting steel plate on the uppermost layer of the jack is pulled away; the jack lifts the steel beam upwards again, the uppermost steel cushion block on the support is pulled away, the jack falls back again, and the uppermost support steel plate on the jack is pulled away; repeating the operation until the steel beam falls on the support. The invention can effectively ensure the jacking and falling precision and stability of the steel box girder, thereby ensuring the jacking and falling safety of the steel box girder, further avoiding the cracking of the steel box girder bridge deck and ensuring the rapid and effective completion of the steel box girder deck construction on site.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a steel box girder jacking and girder falling construction method.
Background
At present, with the development of the construction technology level, the application of steel beams tends to be more and more normalized, and the steel beams become one of the most efficient structural forms for constructing large-span bridges on crossing railway business lines, crossing roads, canyons and rivers. The structure is mainly divided into a simple beam and a continuous beam. Steel box girder structures are now widely used in bridge construction across rivers, railways and highways. The construction process of different structural types of steel beams is different, and all the steel beams have respective characteristics and application ranges, the concrete is pulled to crack due to the hogging moment near the pivot of the continuous combined beam, and in order to resist the tensile stress generated by the hogging moment, a method of adjusting the pivot elevation (namely a jacking method) is often adopted to resist the tensile stress generated by the hogging moment, so that the aim of preventing the concrete from cracking is fulfilled. In the existing stage of continuous steel beam jacking construction, a sand bucket method is mostly adopted to realize jacking height, and the practicability in the aspects of precision control and stability is poor, so that the problem of steel box girder bridge deck cracking is caused.
Therefore, how to provide a steel box girder jacking and girder falling construction method capable of avoiding cracking of a steel box girder bridge deck slab is one of the technical problems to be solved urgently in the field.
Disclosure of Invention
In view of this, the invention provides a steel box girder jacking and girder falling construction method, and aims to solve the problems in the prior art.
In order to solve the technical problem, the invention adopts the following technical scheme:
a steel box girder jacking and girder falling construction method comprises the following steps:
s1: construction preparation: erecting a steel pipe scaffold outside the cover beam, and laying an operation panel on a top platform of the steel pipe scaffold;
s2: arranging a jack: conveying the jack to the pier top of the pier by using a climbing vehicle, carrying the jack to the top of the capping beam by matching with an operator, and arranging the jack around the cushion stone at the top of the capping beam;
s3: and (3) steel beam jacking construction: the jack lifts the steel beam upwards, the weight of the steel beam is supported on the jack, a layer of steel cushion block is additionally arranged on the top of the support on the base stone, the jack falls back, the weight of the steel beam falls on the steel cushion block on the top of the support, and a layer of support steel plate is additionally arranged on the top of the jack; the jack lifts the steel beam upwards again, the weight of the steel beam is supported on the supporting steel plate on the jack, a layer of steel cushion block is additionally arranged on the steel cushion block on the support, the jack falls back again, the weight of the steel beam falls on the steel cushion block at the top of the support, and a layer of supporting steel plate is additionally arranged on the supporting steel plate on the jack; repeating the operation until the steel beam reaches the designed jacking height;
s4: and (3) beam falling construction: the jack lifts the steel beam upwards, the weight of the steel beam is supported on the jack, the steel cushion block on the uppermost layer of the support is pulled away, the jack falls back, the weight of the steel beam falls onto the steel cushion block on the support, and the steel cushion plate on the uppermost layer of the jack is pulled away; the jack lifts the steel beam upwards again, the weight of the steel beam is supported on the supporting and cushioning steel plate on the jack, the steel pad on the uppermost layer of the support at the moment is pulled away, the jack falls back again, the weight of the steel beam falls onto the steel pad on the top of the support, and the supporting and cushioning steel plate on the uppermost layer of the jack at the moment is pulled away; and repeating the operation until the steel beam falls on the support, thereby completing the beam falling.
Preferably, in S2, four cushion stones are arranged at the top of the bent cap; four jacks are uniformly distributed around each cushion stone, and a leveling steel plate is arranged between the bottom of each jack and the top of the cover beam.
Preferably, in S2, a bearing steel plate is arranged at a position opposite to the jack at the bottom of the steel beam.
Preferably, in S3, before adding the cushion steel cushion block to the top of the support, the steel beam needs to be lifted upwards through the jack, and the wedge-shaped steel plate is added to the top of the support.
Preferably, in S3, the steel pad blocks are padded layer by layer in a criss-cross '#' shaped arrangement.
Preferably, before preparation for construction, the steel beam is hoisted to the cover beam, a protective steel plate is placed on the top of the support in advance, and the protective steel plate is pulled away during beam falling construction.
Compared with the prior art, the invention has the following technical effects: the invention can effectively ensure the jacking and falling precision and stability of the steel box girder, thereby ensuring the jacking and falling safety of the steel box girder, further avoiding the cracking of the steel box girder bridge deck and ensuring the rapid and effective completion of the steel box girder deck construction on site.
Drawings
FIG. 1 is an elevation view of the steel pipe scaffold for jacking a steel box girder according to the present invention;
FIG. 2 is a plan view of the steel pipe scaffold for jacking the steel box girder according to the present invention;
FIG. 3 is a plan view of the jack;
FIG. 4 is a cross-sectional view of the steel box girder being lifted;
FIG. 5 is a longitudinal sectional view of the steel box girder;
FIG. 6 is a plan view of the steel box girder being lifted;
in the figure: 1. a jack; 2. a capping beam; 3. a steel pipe scaffold; 4. a cushion stone; 5. a steel beam; 6. a support; 7. a steel cushion block; 8. supporting a cushion steel plate; 9. leveling a steel plate; 10. a wedge-shaped steel plate; 11. protecting the steel plate; 12. provided is a bridge pier.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Examples
Referring to fig. 1-6, the invention discloses a steel box girder jacking and girder falling construction method, which comprises the following steps:
s1: construction preparation: erecting steel pipe scaffolds 3 on the left side and the right side of a cover beam 2 needing to be provided with a jack 1, laying an operation panel on a top platform of the steel pipe scaffolds 3 to form a safety platform, and enclosing the periphery of the safety platform by adopting a dense mesh net;
s2: arranging a jack 1: conveying the jack 1 to the top of a pier 12 of a pier by using a climbing vehicle, conveying the jack 1 to the top of the bent cap 2 by matching with an operator, and arranging the jack 1 around a cushion stone 4 at the top of the bent cap 2;
s3: and (3) jacking construction of the steel beam 5: the jack 1 lifts the steel beam 5 upwards, the weight of the steel beam 5 is supported on the jack 1, a layer of steel cushion block 7 is additionally arranged on the top of the support 6 on the cushion stone 4, the jack 1 falls back, the weight of the steel beam 5 falls onto the steel cushion block 7 on the top of the support 6, and a layer of support steel plate 8 is additionally arranged on the top of the jack 1; the jack 1 lifts the steel beam 5 upwards again, the weight of the steel beam 5 is supported on a supporting steel plate 8 on the jack 1, a layer of steel cushion block 7 is additionally arranged on the steel cushion block 7 on the support 6, the jack 1 falls back again, the weight of the steel beam 5 falls onto the steel cushion block 7 on the top of the support 6, and a layer of supporting steel plate 8 is additionally arranged on the supporting steel plate 8 on the jack 1; repeating the operation until the steel beam 5 reaches the designed jacking height; in the process that the steel beam 5 reaches the designed jacking height by adopting a mode of reversely jacking and cushioning the steel cushion blocks 7 step by step, the jacks 1 are used for cushioning the support steel plate 8 layer by layer as a safety guarantee measure in the conversion process of a jacking system, so that the instant pressure relief condition of the jack oil pipe due to burst can be effectively avoided;
s4: and (3) beam falling construction: the jack 1 lifts the steel beam 5 upwards, the weight of the steel beam 5 is supported on the jack 1, the steel cushion block 7 on the uppermost layer of the support 6 is pulled away, the jack 1 falls back, the weight of the steel beam 5 falls onto the steel cushion block 7 on the support 6, and the support steel plate 8 on the uppermost layer of the jack 1 is pulled away; the jack 1 lifts the steel beam 5 upwards again, the weight of the steel beam 5 is supported on a supporting steel plate 8 on the jack 1, the steel pad 7 on the support 6 at the moment is pulled away, the jack 1 falls back again, the weight of the steel beam 5 falls on the steel pad 7 on the top of the support 6, and the supporting steel plate 8 on the top of the jack 1 at the moment is pulled away; the operation is repeated until the steel beam 5 falls on the support 6, thereby completing the beam falling.
In the present embodiment, in S1, steel pipe scaffolds 3 are erected on the left and right sides of the two capping beams 2 except for the two outermost capping beams 2 at the bottom of each steel connecting beam 5.
In this embodiment, in S2, four base stones 4 are arranged at the top of each cover beam 2 for erecting the steel pipe scaffold 3, two supports 6 are arranged on each base stone 4, four jacks 1 are arranged around each base stone 4, and a leveling steel plate 9 is arranged between the bottom of each jack 1 and the top of each cover beam 2.
In this embodiment, in S2, the bottom of steel beam 5 is welded with the bearing steel plate in the position opposite to jack 1, and the bearing steel plate is disposed at the joint of the bottom plate and the web of steel beam 5.
In this embodiment, in S3, before adding the steel pad 7 to the top of the support 6, the steel beam 5 needs to be lifted upwards by the jack 1, and the wedge-shaped steel plate 10 is added to the top of the support 6 to adapt to the cross slope at the bottom of the steel beam 5.
In this embodiment, in S3, the steel shim blocks 7 are padded layer by layer in a criss-cross '#' shaped arrangement.
In this embodiment, before preparation for construction, a protective steel plate 11 is placed on top of the support 6 in advance when the steel beam 5 is hoisted to the capping beam 2, for protecting the support 6 during construction.
In this embodiment, in S4, when the jack 1 lifts the steel beam 5 for the first time, the wedge-shaped steel plate 10 and the uppermost steel pad 7 on the support 6 are simultaneously pulled away.
In this embodiment, in S4, the protective steel plate 11 is simultaneously pulled away while the last steel pad 7 on the support 6 is pulled away.
In the embodiment, the jack 1 is 200t jack 1, the limit stroke of the jack 1 is 50mm, the outer diameter is 270mm, the diameter of the inner core is 200mm, and the height is 125mm.
In the present embodiment, the protective steel sheet 11 specification: 600mm (length) × 600mm (width) × 10mm (height).
In this embodiment, need set up the stopper between 5 tip of downhill path end girder steel and 2 back walls of bent cap before the construction of falling the roof beam, at 4 on-the-spot welding bracket side direction dogs in stone backing both sides, prevent to fall roof beam in-process girder steel and produce vertically and horizontal slip.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (6)
1. A steel box girder jacking and girder falling construction method is characterized by comprising the following steps:
s1: construction preparation: erecting a steel pipe scaffold outside the cover beam, and laying an operation panel on a top platform of the steel pipe scaffold;
s2: arranging a jack: conveying the jack to the pier top of the pier by using a climbing vehicle, carrying the jack to the top of the capping beam by matching with an operator, and arranging the jack around the cushion stone at the top of the capping beam;
s3: steel beam jacking construction: the jack lifts the steel beam upwards, the weight of the steel beam is supported on the jack, a layer of steel cushion block is additionally arranged on the top of the support on the base stone, the jack falls back, the weight of the steel beam falls on the steel cushion block on the top of the support, and a layer of support steel plate is additionally arranged on the top of the jack; the jack lifts the steel beam upwards again, the weight of the steel beam is supported on the supporting steel plate on the jack, a layer of steel cushion block is additionally arranged on the steel cushion block on the support, the jack falls back again, the weight of the steel beam falls on the steel cushion block at the top of the support, and a layer of supporting steel plate is additionally arranged on the supporting steel plate on the jack; repeating the operation until the steel beam reaches the designed jacking height;
s4: and (3) beam falling construction: the jack lifts the steel beam upwards, the weight of the steel beam is supported on the jack, the steel cushion block on the uppermost layer of the support is pulled away, the jack falls back, the weight of the steel beam falls onto the steel cushion block on the support, and the steel cushion plate on the uppermost layer of the jack is pulled away; the jack lifts the steel beam upwards again, the weight of the steel beam is supported on the supporting and cushioning steel plate on the jack, the steel cushion block on the uppermost layer of the support at the moment is pulled away, the jack falls back again, the weight of the steel beam falls onto the steel cushion block on the top of the support, and the supporting and cushioning steel plate on the uppermost layer of the jack at the moment is pulled away; and repeating the operation until the steel beam falls on the support, thereby completing the beam falling.
2. The steel box girder jacking and girder dropping construction method according to claim 1, wherein in the S2, four cushion stones are arranged at the top of the bent cap; four jacks are uniformly distributed around each cushion stone, and a leveling steel plate is arranged between the bottom of each jack and the top of the cover beam.
3. The steel box girder jacking and girder dropping construction method according to claim 2, wherein in the S2, a bearing steel plate is arranged at a position where the bottom of the steel girder is opposite to the jack.
4. The construction method for lifting and lowering the steel box girder according to claim 1, wherein in the step S3, before the steel cushion block is added to the top of the support, the steel girder is lifted upwards by the jack, and the wedge-shaped steel plate is added to the top of the support.
5. The steel box girder jacking and girder dropping construction method according to claim 1, wherein in the S3, the steel cushion blocks are arranged in a criss-cross '#' shape and are padded layer by layer.
6. The steel box girder jacking and girder dropping construction method according to claim 1, wherein a protective steel plate is placed on the top of the support in advance when the steel girder is hoisted to the capping girder before preparation for construction, and the protective steel plate is pulled away when the girder dropping construction is performed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211107638.6A CN115404782A (en) | 2022-09-13 | 2022-09-13 | Steel box girder jacking and girder falling construction method |
| ZA2023/01665A ZA202301665B (en) | 2022-09-13 | 2023-02-10 | Construction method of jacking-up and lowering of steel box beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211107638.6A CN115404782A (en) | 2022-09-13 | 2022-09-13 | Steel box girder jacking and girder falling construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115404782A true CN115404782A (en) | 2022-11-29 |
Family
ID=84166606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211107638.6A Pending CN115404782A (en) | 2022-09-13 | 2022-09-13 | Steel box girder jacking and girder falling construction method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115404782A (en) |
| ZA (1) | ZA202301665B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020082728A (en) * | 2001-04-25 | 2002-10-31 | 코벡주식회사 | Process and frame for substituting steel girder of a railway bridge for concrete slab |
| CN106087757A (en) * | 2016-08-01 | 2016-11-09 | 中铁十七局集团第三工程有限公司 | A high position in box beam erection falls beam construction method |
| CN111254840A (en) * | 2020-03-19 | 2020-06-09 | 中国五冶集团有限公司 | Integral beam falling structure and beam falling method for steel box girder bridge |
| 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 |
-
2022
- 2022-09-13 CN CN202211107638.6A patent/CN115404782A/en active Pending
-
2023
- 2023-02-10 ZA ZA2023/01665A patent/ZA202301665B/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020082728A (en) * | 2001-04-25 | 2002-10-31 | 코벡주식회사 | Process and frame for substituting steel girder of a railway bridge for concrete slab |
| CN106087757A (en) * | 2016-08-01 | 2016-11-09 | 中铁十七局集团第三工程有限公司 | A high position in box beam erection falls beam construction method |
| CN111254840A (en) * | 2020-03-19 | 2020-06-09 | 中国五冶集团有限公司 | Integral beam falling structure and beam falling method for steel box girder bridge |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA202301665B (en) | 2023-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112227234B (en) | Construction method for lifting and transforming bridge | |
| CN112854008A (en) | Prefabricated bridge pier and beam integrated bridge girder erection machine and construction method thereof | |
| CN112942147A (en) | Bridge pile active underpinning method | |
| CN111236089A (en) | Uneven jacking system and uneven jacking construction method for existing bridge superstructure | |
| CN111560837A (en) | Lifting type river-crossing bridge structure and using method thereof | |
| CN109881587B (en) | Integral installation method of main tower upper cross beam support in strong wind environment | |
| CN113774972B (en) | Reinforcing method for overload punching damage of independent foundation under column | |
| CN108643213B (en) | Construction method of underwater bearing platform construction structure | |
| CN106320192A (en) | Beam section replacement reinforcement method for large-span concrete continuous beam bridge | |
| CN211872669U (en) | Uneven jacking system of current bridge superstructure | |
| CN104532746B (en) | Construction method of upper structure of steel-concrete overlapping beam | |
| CN209907206U (en) | Auxiliary device for installing dumbbell-shaped arch ribs | |
| CN217651624U (en) | Temporary support for bridge superstructure construction | |
| JP4040900B2 (en) | 3D intersection construction method, 3D intersection and moving platform | |
| CN115404782A (en) | Steel box girder jacking and girder falling construction method | |
| CN111186780A (en) | Movable arm type tower crane underframe weight type foundation and construction method | |
| CN216194138U (en) | Existing bridge pier stud construction system of rectifying | |
| CN112761081B (en) | Replacement structure and construction method for active ultra-wide beam body support | |
| CN113832875A (en) | Existing bridge pier column deviation rectifying construction system and construction method thereof | |
| CN111622091B (en) | Stress test method for prefabricated bridge pier | |
| CN114086485A (en) | Construction method for replacing support of long-span high-speed rail continuous beam | |
| CN115058977A (en) | Construction method for prefabricated pier stud of urban bridge | |
| CN114561875A (en) | Steel box girder jacking and high-position girder falling method | |
| CN212426772U (en) | Suspended bracket system for cast-in-place bridge deck of steel plate composite beam | |
| CN114658031B (en) | Basement roof returning supporting structure of overweight steel structure truss and construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |