CN205501840U - A braced system for construction of overpass cast -in -situ box girder - Google Patents
A braced system for construction of overpass cast -in -situ box girder Download PDFInfo
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- CN205501840U CN205501840U CN201620309461.1U CN201620309461U CN205501840U CN 205501840 U CN205501840 U CN 205501840U CN 201620309461 U CN201620309461 U CN 201620309461U CN 205501840 U CN205501840 U CN 205501840U
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Abstract
The utility model discloses a braced system for construction of overpass cast -in -situ box girder, this braced system includes: case breast portion shaped steel support system, displacement monitoring system and full framing, case breast portion shaped steel support system includes concrete strip shape basis, steel tube column, bottom end rail, entablature, auto -lock jack and longeron, displacement monitoring system includes shaped steel nose girder, aluminum alloy guide rail and laser displacement sensor. The construction method of utilizing the case roof beam of this braced system realization includes following step: 1, there has been cast -in -situ box girder bottom shaped steel support system installation 2, jack and the installation of displacement monitoring system, 3, the full framing construction of case back portion has been watered, 4, the support pre -compaction, 5, found mould and concreting, the utility model discloses the construction of waiting to water the case roof beam of case roof beam top can be realized having watered, through setting up the support system at the bottom of accomplishing cast -in -situ box girder and setting up the full framing above that and stride the construction of waiting to water the case roof beam on going on, time limit for a project weak point, economy, safe and reliable's effect is reached.
Description
Technical field
This utility model belongs to technical field of road construction, particularly relates to a kind of support system for viaduct construction of cast-in-situ box-beam.
Background technology
Along with sharply increasing of rapid development of economy and the modern means of communication, viaduct is just playing increasing effect in terms of alleviating traffic pressure, is therefore being widely used in highway and urban road, has promoted the development of bridge technology the most further.
Mutilevel overpass, owing to relating to the mutual leap on vertical space, interfering of construction certainly will be caused, therefore the upper sequence of construction of design is low after secondary first height after following the former head, in bridge superstructure type selecting, take into account cost, duration and technology simultaneously, thus full framing cast-in-situ concrete continuous box beam is extensively applied because of its economy, technology maturation in viaduct.
Owing to using floor stand, so technological process low after needing during scissors crossing design and construction to use first height.But in road event is put into practice, article two, intersect major trunk roads (at a high speed) highway crossed over, typically belong to disparity items legal person, although design can be coordinated, but it is often different because of starting date, duration is different, cause down and wear the leading construction problem of overpass, this results in the problem that the full framing across the cast-in-place box bridge of full framing cannot be set up, if full framing is ridden upon in the box beam poured, the damage having watered box beam may be caused, if carry out structure change temporarily, as overpass beam is altered to assemble scheme across Hanging Basket cantilever or steel box-girder greatly, not only extend the duration, and considerably increase cost.
Utility model content
The purpose of this utility model is to provide a kind of support system for viaduct construction of cast-in-situ box-beam.
To achieve these goals, this utility model provides a kind of support system for viaduct construction of cast-in-situ box-beam, and this system is for watering the construction of the box beam to be poured above box beam, and described box beam bottom of having watered has passive pier stud；Comprising: box beam bottom-type steel bracket system, displacement monitoring system and full framing；
Described box beam bottom-type steel bracket system includes:
Concrete continuous footing, described concrete continuous footing is arranged on the ground immediately below the web watering box beam, vertical with web；The quantity of concrete continuous footing is multiple, be arranged in parallel each other；
Steel pipe post, fix vertical with described concrete continuous footing of described steel pipe post is connected, and each concrete continuous footing is equipped with many steel pipe posts, and linearly type is arranged；
Sill, described sill is arranged on the root steel pipe post that linearly type is arranged；
Entablature, described entablature is positioned at above described sill；
Self-locking jack, described self-locking jack is arranged between described sill and entablature；
Longeron, described longeron is arranged on the top of entablature, vertical with described entablature, and is positioned at below the web watering box beam；
Described displacement monitoring system includes:
Shaped steel nose girder, the two ends of described shaped steel nose girder are fixing with adjacent pier stud respectively to be connected, and the quantity of shaped steel nose girder is two, be arranged in parallel each other；
Aluminum alloy guide rail, described aluminum alloy guide rail is fixed between two root type steel nose girders；
Laser displacement sensor, described laser displacement sensor is fixed on described aluminum alloy guide rail；And,
Described full framing rides upon and waters above box beam.
This utility model is as above for the support system of viaduct construction of cast-in-situ box-beam, further, described concrete continuous footing top has pre-embedded bolt, arranges ring flange bottom steel pipe post, realizes steel pipe post by pre-embedded bolt and ring flange and is connected with the fixing of concrete continuous footing.
This utility model is as above for the support system of viaduct construction of cast-in-situ box-beam, and further, described box beam bottom-type steel bracket system also includes that rubber blanket, described rubber blanket are arranged between longeron and the web having watered box beam.
This utility model is as above for the support system of viaduct construction of cast-in-situ box-beam, and further, described entablature is Two bors d's oeuveres I-steel；Described sill is Two bors d's oeuveres I-steel.
The beneficial effects of the utility model are:
When utilizing this utility model support system to carry out box girder construction, full framing is carried out precompressed, the camber of existing cast-in-situ box girder is set by precompressed data；By laser displacement sensor and self-locking jack system, realize lower floor has been watered synchronization monitoring and the bit shift compensation of box beam.Thus ensure that and full framing is being ridden upon in the box beam poured, then carry out during construction of cast-in-situ box-beam, being not result in that watering box beam damages.Additionally, laser displacement sensor can accurately and comprehensively reflect the change in displacement of existing cast-in-situ box girder, make the deformation of existing cast-in-situ box girder be constantly in can survey, controllable state.
This utility model introducing by box beam bottom-type steel bracket system, the Cast-in-situ Beam constructed can be made full use of, set up full framing thereon, not only solve upper strata cast-in-place box beam bracket and set up safely problem, and accelerate construction speed, decrease the input of the temporary structures such as support.And carry out synchronization monitoring by laser displacement sensor and self-locking jack system and microspur compensates, carried out safe early warning effectively, in time and controlled work, any infringement, remarkable in economical benefits will not have been caused to completing box beam.
Accompanying drawing explanation
By the detailed description made in conjunction with the following drawings, of the present utility model above-mentioned and/or other aspects and advantage will be apparent from and be easier to understand, and these accompanying drawings the most schematically, are not limiting as this utility model, wherein:
Fig. 1 is this utility model sectional schematic diagram for the support system of viaduct construction of cast-in-situ box-beam；
Fig. 2 is this utility model side schematic view for the support system of viaduct construction of cast-in-situ box-beam；
Fig. 3 is steel pipe post and the connection diagram thereof of a kind of embodiment of this utility model；
Fig. 4 is the A-A tangent plane schematic diagram of Fig. 1；
Fig. 5 is laser displacement sensor, shaped steel nose girder and the scheme of installation of aluminum alloy guide rail；
Fig. 6 is the construction method flow chart of viaduct cast-in-situ box girder.
In accompanying drawing, the list of parts representated by each label is as follows:
1, concrete continuous footing, 2, steel pipe post, 3, ring flange, 4, pre-embedded bolt, 5, entablature, 6, sill, 7, longeron, 8, laser displacement sensor, 9, shaped steel nose girder, 10, aluminum alloy guide rail, 11, self-locking jack, 12, water box beam, 13, full framing, 14, box beam to be poured, 15, bridging, 16, the landing stage of scaffold, 17, Control Room under bridge, 18, rubber blanket, 19, pier stud.
Detailed description of the invention
Hereinafter, the embodiment of the support system for viaduct construction of cast-in-situ box-beam of the present utility model is described with reference to the accompanying drawings.
The embodiment recorded at this is specific detailed description of the invention of the present utility model, is used for illustrating design of the present utility model, is all explanatory and exemplary, should not be construed as this utility model embodiment and the restriction of this utility model scope.In addition to the embodiment recorded at this, those skilled in the art can also use other technical scheme obvious based on the application claims and description disclosure of that, and these technical schemes include using the technical scheme making any obvious substitutions and modifications to the embodiment recorded at this.
The accompanying drawing of this specification is schematic diagram, aids in illustrating design of the present utility model, it is schematically indicated the shape of each several part and mutual relation thereof.Note that the structure of each parts for the ease of clearly showing this utility model embodiment, do not draw according to identical ratio between each accompanying drawing.Identical reference marker is used for representing identical part.
Fig. 1 illustrates the support system for viaduct construction of cast-in-situ box-beam of a kind of embodiment of this utility model, and this system is for watering the construction of the box beam to be poured 14 above box beam 12, and described box beam 12 bottom of having watered has passive pier stud 19；Comprising: box beam bottom-type steel bracket system, displacement monitoring system and full framing；
Described box beam bottom-type steel bracket system includes:
Concrete continuous footing 1, described concrete continuous footing 1 is arranged on the ground immediately below the web watering box beam, vertical with web；The quantity of concrete continuous footing is multiple, be arranged in parallel each other；
Steel pipe post 2, fix vertical with described concrete continuous footing 1 of described steel pipe post 2 is connected, and each concrete continuous footing 1 is equipped with many steel pipe posts 2, and linearly type is arranged；
As shown in Figure 4, described concrete continuous footing top has pre-embedded bolt 4, arranges ring flange 3 bottom steel pipe post, realizes steel pipe post 2 by pre-embedded bolt 4 and ring flange 3 and is connected with the fixing of concrete continuous footing 1.
Sill 6, described sill 6 is arranged on the root steel pipe post 2 that linearly type is arranged；
Entablature 5, described entablature 5 is positioned at above described sill 6；In a kind of specific embodiment, described entablature is Two bors d's oeuveres I-steel；Described sill is Two bors d's oeuveres I-steel.Described Two bors d's oeuveres I-steel is welded side by side by two same model I-steel.
Self-locking jack 11, described self-locking jack 11 is arranged between described sill 6 and entablature 5；Computer and hydraulic pressure unit is utilized to control self-locking jack duty；
Longeron 7, described longeron 7 is arranged on the top of entablature 5, vertical with described entablature 5, and is positioned at below the web watering box beam；
Described displacement monitoring system includes:
Shaped steel nose girder 9, the two ends of described shaped steel nose girder 9 are fixing with adjacent pier stud 19 respectively to be connected, and the quantity of shaped steel nose girder 9 is two, be arranged in parallel each other；
Aluminum alloy guide rail 10, described aluminum alloy guide rail 10 is fixed between two root type steel nose girders 9；
Laser displacement sensor 8, described laser displacement sensor 8 is fixed on described aluminum alloy guide rail 10, utilizes computer to monitor laser displacement sensor；And,
Described full hall props up 13 framves and rides upon and water above box beam 12.
As it is shown on figure 3, described box beam bottom-type steel bracket system also includes that rubber blanket 18, described rubber blanket 18 are arranged between longeron 7 and the web having watered box beam.The effect of rubber blanket 18 is to prevent unbalance stress and box beam Local Loads excessive.
The box girder construction method utilizing the support system for viaduct construction of cast-in-situ box-beam of above-described embodiment to carry out comprises the following steps:
Step 1, existing cast-in-situ box girder bottom-type steel bracket system is installed；
A, strip concrete foundation pour；Ground at the bottom of box beam carrying out cleaning leveling, longitudinally pours C25 concrete strip concrete foundation along ground immediately below box girder web, concrete foundation section width 1.2m, high 0.5m, concrete foundation top pre-embedded bolt, for steel pipe post Flange joint；
B, steel pipe post are installed；Steel pipe post, fixed flange bottom steel pipe post are installed at concrete foundation top, are fixed with the pre-embedded bolt in concrete foundation by ring flange；In a kind of specific embodiment, steel pipe post is φ 600, the steel pipe of wall thickness 8mm.
C, longeron are installed；2 longerons divided into by box beam per pass web；Top section longitudinal beam is installed by loader auxiliary positioning, and longeron utilizes temporary support to fix, and temporary support refers to vertical steel pipe support (steel pipe of the support system that staggers) from ground, for interim fixing；Whole cushioning white rubber pads between contact surface at the bottom of longeron and box beam, to prevent unbalance stress and box beam Local Loads excessive；In a kind of specific embodiment, described longeron is H600 shaped steel；
D, crossbeam are installed；Crossbeam uses No. 45 I-steel of Two bors d's oeuveres, if Dual-layer beam structure, is used for laying jacking self-locking jack between two-layer crossbeam；After longeron installs, utilize the calabash arranged on box girder bridge face to be arranged on bottom box beam by crossbeam, and temporarily fixing (can be realized by the support on box girder bridge face, be similar to counter hanging.)；In a kind of specific embodiment, crossbeam uses No. 45 I-steel of Two bors d's oeuveres；
Step 2, jack and displacement monitoring system are installed；
A, jack are installed；For convenience of installation and the process in pre-jacking space of jack, two-layer crossbeam clearance control, at about 150mm, places jack in gap after installing, the auxiliary utilizing the steel plate of 20mm to carry out gap adjusts, and utilizes jack pair beam base plate to carry out sedimentation and compensates；
B, guide rails assembling；Watering erection shaped steel nose girder between two pier studs of box beam, shaped steel nose girder, in addition to contacting with bridge pier, contacts without any with between ground, box beam；Arranging aluminum alloy guide rail, and fixed laser displacement transducer set on aluminum alloy guide rail between two root type steel nose girders, the laser displacement sensor installed in laser displacement sensor overlaps has watered the deformed condition of box beam for monitoring；
C, the landing stage of scaffold are set up；At the other scaffolding platform 16 of steel pipe post, being used for laying hydraulic pressure unit, this hydraulic pressure unit is used for driving self-locking jack to work；Walking channel is had so that equipment working condition is carried out field review between each landing stage of scaffold 16；
Control room 17 under d, bridge；Control room 17 is set up under existing cast-in-situ box girder；The cable being connected with laser displacement sensor is connected under bridge in control room, is monitored laser displacement sensor by the computer in control room under bridge and is controlled self-locking jack；
E, indicating value according to laser displacement sensor, determine and water box beam initial baseline plane；
Step 3, has watered box beam top Full space support construction；Full framing uses HR adjustable heavy duty door-type scaffold to set up, and sets up conveniently, safe and reliable；For preventing existing box beam end face Local Loads excessive, using the method for No. 20 channel-section steels of cushioning below the collet of full framing, channel-section steel is longitudinally laid along existing cast-in-situ box girder, to improve the force-bearing situation of full framing；
Step 4, pre-pressing bracket；For guaranteeing construction safety, full framing carrying out precompressed, precompressed uses sand pocket；Loaded weight is the 120% of construction loads；The camber of existing cast-in-situ box girder is set by precompressed data；
Step 5, formwork erection casting concrete；In work progress, laser displacement sensor can accurately and comprehensively reflect the change in displacement of existing cast-in-situ box girder, self-locking jack can react existing cast-in-situ box girder each point stressing conditions, and existing cast-in-situ box girder displacement is adjusted, make the deformation of existing cast-in-situ box girder be constantly in can survey, controllable state.
In road event is put into practice, article two, intersect major trunk roads (at a high speed) highway crossed over, typically belong to disparity items legal person, although design can be coordinated, but it is often different because of starting date, duration is different, cause down and wear the leading construction problem of overpass, this results in the problem that the full framing across the cast-in-place box bridge of full framing cannot be set up, if full framing is ridden upon in the box beam poured, the damage having watered box beam may be caused, if carry out structure change temporarily, as overpass beam is altered to assemble scheme across Hanging Basket cantilever or steel box-girder greatly, not only extend the duration, and considerably increase cost.
When utilizing this utility model support system to carry out box girder construction, full framing is carried out precompressed, the camber of existing cast-in-situ box girder is set by precompressed data.Thus ensure that and full framing is being ridden upon in the box beam poured, then carry out during construction of cast-in-situ box-beam, being not result in that watering box beam damages.Additionally, laser displacement sensor can accurately and comprehensively reflect the change in displacement of existing cast-in-situ box girder, make the deformation of existing cast-in-situ box girder be constantly in can survey, controllable state.
Each technical characteristic of above-mentioned disclosure is not limited to disclosed with further feature combination, those skilled in the art also can carry out between each technical characteristic according to the purpose of invention other combine, be as the criterion realizing the purpose of this utility model.
Claims (5)
1., for a support system for viaduct construction of cast-in-situ box-beam, this system is for watering the construction of the box beam to be poured above box beam, and described box beam bottom of having watered has passive pier stud；It is characterized in that, including: box beam bottom-type steel bracket system, displacement monitoring system and full framing；
Described box beam bottom-type steel bracket system includes:
Concrete continuous footing, described concrete continuous footing is arranged on the ground immediately below the web watering box beam, vertical with web；The quantity of concrete continuous footing is multiple, be arranged in parallel each other；
Steel pipe post, fix vertical with described concrete continuous footing of described steel pipe post is connected, and each concrete continuous footing is equipped with many steel pipe posts, and linearly type is arranged；
Sill, described sill is arranged on the root steel pipe post that linearly type is arranged；
Entablature, described entablature is positioned at above described sill；
Self-locking jack, described self-locking jack is arranged between described sill and entablature；
Longeron, described longeron is arranged on the top of entablature, vertical with described entablature, and is positioned at below the web watering box beam；
Described displacement monitoring system includes:
Shaped steel nose girder, the two ends of described shaped steel nose girder are fixing with adjacent pier stud respectively to be connected, and the quantity of shaped steel nose girder is two, be arranged in parallel each other；
Aluminum alloy guide rail, described aluminum alloy guide rail is fixed between two root type steel nose girders；
Laser displacement sensor, described laser displacement sensor is fixed on described aluminum alloy guide rail；And,
Described full framing rides upon and waters above box beam.
Support system for viaduct construction of cast-in-situ box-beam the most according to claim 1, it is characterized in that, described concrete continuous footing top has pre-embedded bolt, ring flange is set bottom steel pipe post, realizes steel pipe post by pre-embedded bolt and ring flange and be connected with the fixing of concrete continuous footing.
Support system for viaduct construction of cast-in-situ box-beam the most according to claim 1, it is characterised in that described box beam bottom-type steel bracket system also includes that rubber blanket, described rubber blanket are arranged between longeron and the web having watered box beam.
Support system for viaduct construction of cast-in-situ box-beam the most according to claim 1, it is characterised in that described entablature is Two bors d's oeuveres I-steel.
Support system for viaduct construction of cast-in-situ box-beam the most according to claim 1, it is characterised in that described sill is Two bors d's oeuveres I-steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620309461.1U CN205501840U (en) | 2016-04-14 | 2016-04-14 | A braced system for construction of overpass cast -in -situ box girder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620309461.1U CN205501840U (en) | 2016-04-14 | 2016-04-14 | A braced system for construction of overpass cast -in -situ box girder |
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| CN205501840U true CN205501840U (en) | 2016-08-24 |
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| CN201620309461.1U Expired - Fee Related CN205501840U (en) | 2016-04-14 | 2016-04-14 | A braced system for construction of overpass cast -in -situ box girder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735139A (en) * | 2016-04-14 | 2016-07-06 | 浙江大学城市学院 | Supporting system for construction of cast-in-situ box beam in overpass and construction method of box beam |
| CN110878525A (en) * | 2019-11-06 | 2020-03-13 | 武船重型工程股份有限公司 | Double-layer steel box girder bridge installation method and combined support for installation |
-
2016
- 2016-04-14 CN CN201620309461.1U patent/CN205501840U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735139A (en) * | 2016-04-14 | 2016-07-06 | 浙江大学城市学院 | Supporting system for construction of cast-in-situ box beam in overpass and construction method of box beam |
| CN105735139B (en) * | 2016-04-14 | 2017-04-26 | 浙江大学城市学院 | Supporting system for construction of cast-in-situ box beam in overpass and construction method of box beam |
| CN110878525A (en) * | 2019-11-06 | 2020-03-13 | 武船重型工程股份有限公司 | Double-layer steel box girder bridge installation method and combined support for installation |
| CN110878525B (en) * | 2019-11-06 | 2022-04-05 | 武船重型工程股份有限公司 | Double-layer steel box girder bridge installation method and combined support for installation |
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