CN105735139A - Supporting system for construction of cast-in-situ box beam in overpass and construction method of box beam - Google Patents
Supporting system for construction of cast-in-situ box beam in overpass and construction method of box beam Download PDFInfo
- Publication number
- CN105735139A CN105735139A CN201610229720.4A CN201610229720A CN105735139A CN 105735139 A CN105735139 A CN 105735139A CN 201610229720 A CN201610229720 A CN 201610229720A CN 105735139 A CN105735139 A CN 105735139A
- Authority
- CN
- China
- Prior art keywords
- box beam
- box
- construction
- cast
- situ
- 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.)
- Granted
Links
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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a supporting system for the construction of a cast-in-situ box beam in an overpass and a construction method of the box beam. The supporting system comprises a cast-in-situ box beam bottom section steel support system, a displacement monitoring system and a full support; the cast-in-situ box beam bottom section steel support system comprises a concrete strip foundation, a steel pipe stand column, a lower cross beam, an upper cross beam, a self-locking jack and a longitudinal beam; the displacement monitoring system comprises a profile steel nose beam, an aluminum alloy guide rail and a laser displacement sensor. The construction method of the box beam comprises the following steps: 1, mounting an existing cast-in-situ box beam bottom section steel support system; 2, mounting the jack and the displacement monitoring system; 3, constructing the full support at the top of a cast box beam; 4, pre-pressing the support; 5, erecting a formwork and pouring concrete. According to the supporting system and the construction method disclosed by the invention, the construction of to-be-casted box beams above the cast box beam can be realized; the construction of the overcrossing to-be-casted box beams is performed through erecting the support system at the bottom of the completed cast-in-situ box beam and erecting the full support on the support system, so that the effects of being short in construction period, economic, safe and reliable are achieved.
Description
Technical field
The invention belongs to technical field of road construction, particularly relate to an a kind of support system for viaduct construction of cast-in-situ box-beam, and apply the construction method of the box beam of this support system.
Background technology
Along with sharply increasing of rapid development of economy and the modern means of communication, viaduct is just playing increasing effect in alleviating traffic pressure, is therefore widely used in highway and urban road, has also promoted the development of bridge technology 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 subject to extensive use because of its economy, technology maturation in viaduct.
Owing to adopting floor stand, so technological process low after needing employing first height during scissors crossing design and construction.But in road event is put into practice, article two, intersect major trunk roads (at a high speed) highway crossed over, generally belong to disparity items legal person, although design can be coordinated, but often because starting date is different, 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 built, may result in watering the damage of box beam, if carry out structure change temporarily, scheme is assembled across Hanging Basket cantilever or steel box-girder greatly as overpass beam is altered to, not only extend the duration, and considerably increase cost.
Summary of the invention
The first object of the present invention is to provide an a kind of support system for viaduct construction of cast-in-situ box-beam.
The second object of the present invention is to provide the construction method of a kind of box beam.
In order to realize above-mentioned first purpose, the present invention provides an 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.
The present invention is as above for a 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.
The present invention is as above for a support system of viaduct construction of cast-in-situ box-beam, and further, described box beam bottom-type steel bracket system also includes rubber blanket, and described rubber blanket is arranged between longeron and the web having watered box beam.
The present invention is as above for a 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.
In order to realize above-mentioned second purpose, the present invention provides the construction method of a kind of box beam, comprises the following steps:
Step 1, existing cast-in-situ box girder bottom-type steel bracket system is installed；
A, strip concrete foundation are built；Building strip concrete foundation immediately below box girder web on ground, 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；
C, longeron are installed；2 longerons divided into by box beam per pass web；
D, crossbeam are installed；Crossbeam adopts I-steel, if Dual-layer beam structure, is used for laying self-locking jack between entablature and sill；
Step 2, jack and displacement monitoring system are installed；
A, jack are installed；Jack is arranged between entablature and sill；
B, guide rails assembling；Watering erection shaped steel nose girder between two pier studs of box beam, shaped steel nose girder, except contacting with bridge pier, contacts without any with between ground, box beam；Aluminum alloy guide rail is set between two root type steel nose girders, and on aluminum alloy guide rail fixed laser displacement transducer set, the laser displacement sensor installed in laser displacement sensor set is used for monitoring the deformed condition watering box beam；
C, the landing stage of scaffold are set up；At the other scaffolding platform 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 equipment working condition is carried out field review between each landing stage of scaffold；
Control room under d, bridge；Control room 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, and to laser displacement sensor monitoring self-locking jack is controlled by the computer in control room under bridge；
E, indicating value according to laser displacement sensor, it is determined that watered box beam initial baseline plane；
Step 3, has watered box beam top Full space support construction；Construction full framing, cushioning channel-section steel 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 being carried out precompressed, precompressed adopts sand pocket；Loaded weight is more than 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.
The construction method of present invention box beam as above, it is preferable that in step 1, longeron and whole cushioning white rubber pads between contact surface at the bottom of box beam, to prevent unbalance stress and box beam Local Loads excessive；In a kind of specific embodiment, described longeron is H600 shaped steel.
The construction method of present invention box beam as above, it is preferable that in step 1, the clearance control between entablature and sill, at about 150mm, is placed jack in gap, is utilized the steel plate of 20mm to carry out the auxiliary adjustment in gap after installing.
The construction method of present invention box beam as above, it is preferable that in step 3, full framing adopts HR adjustable heavy duty door-type scaffold to set up.
The construction method of present invention box beam as above, it is preferable that in step 4, loaded weight is about the 120% of construction loads.
The invention has the beneficial effects as follows:
When utilizing the present invention to prop up support system and box girder construction method, 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, it is achieved lower floor to have been watered synchronization monitoring and the bit shift compensation of box beam.Thus ensure that and full framing being ridden upon in the box beam built, it is not result in watering box beam when then carrying out construction of cast-in-situ box-beam and 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.
The present invention 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, above-mentioned and/or other aspects of the present invention and advantage will be apparent from and be easier to understand, and these accompanying drawings simply schematically, are not limiting as the present invention, wherein:
Fig. 1 is the present invention sectional schematic diagram for a support system of viaduct construction of cast-in-situ box-beam；
Fig. 2 is the present invention side schematic view for a support system of viaduct construction of cast-in-situ box-beam；
Fig. 3 is steel pipe post and the connection diagram thereof of an embodiment of the present invention；
Fig. 4 is the A-A tangent plane schematic diagram of Fig. 1；
Fig. 5 is the scheme of installation of laser displacement sensor, shaped steel nose girder and 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 support system for viaduct construction of cast-in-situ box-beam of the present invention and the embodiment of the construction method of box beam are described with reference to the accompanying drawings.
Embodiment in this record is the specific detailed description of the invention of the present invention, for the design of the present invention is described, is all explanatory and exemplary, should not be construed as the restriction to embodiment of the present invention and the scope of the invention.Except except the embodiment of this record, those skilled in the art can also adopt other technical scheme apparent based on the application claims and description disclosure of that, and these technical schemes include adopting the technical scheme making any apparent substitutions and modifications to the embodiment in this record.
The accompanying drawing of this specification is schematic diagram, aids in illustrating the design of the present invention, 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 the embodiment of the present invention, 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 an embodiment of the present invention, 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 fixed with adjacent pier stud 19 respectively and are 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 that laser displacement sensor is monitored；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 rubber blanket 18, described rubber blanket 18 is 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 that the support system for viaduct construction of cast-in-situ box-beam of above-described embodiment carries out is utilized to comprise the following steps:
Step 1, existing cast-in-situ box girder bottom-type steel bracket system is installed；
A, strip concrete foundation are built；Ground at the bottom of box beam carrying out cleaning leveling, longitudinally builds C25 concrete strip concrete foundation, concrete foundation section width 1.2m along ground immediately below box girder web, 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 adopts 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 (support can passed through on box girder bridge face realizes, and be similar to counter hanging.)；In a kind of specific embodiment, crossbeam adopts 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 the process of the installation of jack and pre-jacking space, two-layer crossbeam clearance control, at about 150mm, is placed jack in gap, is utilized the steel plate of 20mm to carry out the auxiliary adjustment in gap after installing, utilize jack pair beam base plate to carry out sedimentation and compensate；
B, guide rails assembling；Watering erection shaped steel nose girder between two pier studs of box beam, shaped steel nose girder, except contacting with bridge pier, contacts without any with between ground, box beam；Aluminum alloy guide rail is set between two root type steel nose girders, and on aluminum alloy guide rail fixed laser displacement transducer set, the laser displacement sensor installed in laser displacement sensor set is used for monitoring the deformed condition watering box beam；
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 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, and to laser displacement sensor monitoring self-locking jack is controlled by the computer in control room under bridge；
E, indicating value according to laser displacement sensor, it is determined that watered box beam initial baseline plane；
Step 3, has watered box beam top Full space support construction；Full framing adopts 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, adopting 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 being carried out precompressed, precompressed adopts 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, generally belong to disparity items legal person, although design can be coordinated, but often because starting date is different, 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 built, may result in watering the damage of box beam, if carry out structure change temporarily, scheme is assembled across Hanging Basket cantilever or steel box-girder greatly as overpass beam is altered to, not only extend the duration, and considerably increase cost.
When utilizing the present invention to prop up support system and box girder construction method, full framing is carried out precompressed, the camber of existing cast-in-situ box girder is set by precompressed data；The adjustment of camber is realized by self-locking jack.Thus ensure that and full framing being ridden upon in the box beam built, it is not result in watering box beam when then carrying out construction of cast-in-situ box-beam and 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 that disclosed with further feature combination, and those skilled in the art also can carry out other combination between each technical characteristic according to the purpose of invention, and the purpose to realize the present invention is as the criterion.
Claims (10)
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.
2.According to claimThe support system for viaduct construction of cast-in-situ box-beam described in 1, it is characterized in that, 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.
3.According to claimThe support system for viaduct construction of cast-in-situ box-beam described in 1, it is characterised in that described box beam bottom-type steel bracket system also includes rubber blanket, and described rubber blanket is arranged between longeron and the web having watered box beam.
4.According to claimThe support system for viaduct construction of cast-in-situ box-beam described in 1, it is characterised in that described entablature is Two bors d's oeuveres I-steel.
5.According to claimThe support system for viaduct construction of cast-in-situ box-beam described in 1, it is characterised in that described sill is Two bors d's oeuveres I-steel.
6. the construction method of a box beam, it is characterised in that utilizeClaimA support system described in any one of 1-5 is constructed, and comprises the following steps:
Step 1, existing cast-in-situ box girder bottom-type steel bracket system is installed；
A, strip concrete foundation are built；Building strip concrete foundation immediately below box girder web on ground, 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；
C, longeron are installed；2 longerons divided into by box beam per pass web；
D, crossbeam are installed；Crossbeam adopts I-steel, if Dual-layer beam structure, is used for laying self-locking jack between entablature and sill；
Step 2, jack and displacement monitoring system are installed；
A, jack are installed；Jack is arranged between entablature and sill；
B, guide rails assembling；Watering erection shaped steel nose girder between two pier studs of box beam, shaped steel nose girder, except contacting with bridge pier, contacts without any with between ground, box beam；Aluminum alloy guide rail is set between two root type steel nose girders, and on aluminum alloy guide rail fixed laser displacement transducer set, the laser displacement sensor installed in laser displacement sensor set is used for monitoring the deformed condition watering box beam；
C, the landing stage of scaffold are set up；At the other scaffolding platform 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 equipment working condition is carried out field review between each landing stage of scaffold；
Control room under d, bridge；Control room 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, and to laser displacement sensor monitoring self-locking jack is controlled by the computer in control room under bridge；
E, indicating value according to laser displacement sensor, it is determined that watered box beam initial baseline plane；
Step 3, has watered box beam top Full space support construction；Construction full framing, cushioning channel-section steel 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 being carried out precompressed, precompressed adopts sand pocket；Loaded weight is more than 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.
7.According to claimThe construction method of the box beam described in 6, it is characterised in that in step 1, longeron and whole cushioning white rubber pads between contact surface at the bottom of box beam, to prevent unbalance stress and box beam Local Loads excessive；In a kind of specific embodiment, described longeron is H600 shaped steel.
8.According to claimThe construction method of the box beam described in 6, it is characterised in that in step 1, the clearance control between entablature and sill, at about 150mm, is placed jack in gap, is utilized the steel plate of 20mm to carry out the auxiliary adjustment in gap after installing.
9.According to claimThe construction method of the box beam described in 6, it is characterised in that in step 3, full framing adopts HR adjustable heavy duty door-type scaffold to set up.
10.According to claimThe construction method of the box beam described in 6, it is characterised in that in step 4, loaded weight is about the 120% of construction loads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610229720.4A CN105735139B (en) | 2016-04-14 | 2016-04-14 | Supporting system for construction of cast-in-situ box beam in overpass and construction method of box beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610229720.4A CN105735139B (en) | 2016-04-14 | 2016-04-14 | Supporting system for construction of cast-in-situ box beam in overpass and construction method of box beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105735139A true CN105735139A (en) | 2016-07-06 |
| CN105735139B CN105735139B (en) | 2017-04-26 |
Family
ID=56255373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610229720.4A Expired - Fee Related CN105735139B (en) | 2016-04-14 | 2016-04-14 | Supporting system for construction of cast-in-situ box beam in overpass and construction method of box beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105735139B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223201A (en) * | 2016-07-26 | 2016-12-14 | 中南大学 | The method for correcting error of beam section bridge linear monitoring |
| CN106988337A (en) * | 2017-04-20 | 2017-07-28 | 南京工业大学 | A kind of reinforcement means for being used to reduce bar shaped shallow foundation house differential settlement |
| CN108981590A (en) * | 2018-06-13 | 2018-12-11 | 中铁隧道集团二处有限公司 | A kind of high-speed rail precast beam positioning system |
| CN109056438A (en) * | 2018-09-06 | 2018-12-21 | 上海市机械施工集团有限公司 | A kind of construction method of overhead road of city ring road transformation |
| CN110181650A (en) * | 2019-06-03 | 2019-08-30 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of prefabricated case beam template synchronous jacking system and its control method |
| CN111551326A (en) * | 2020-05-28 | 2020-08-18 | 广西交科集团有限公司 | Displacement monitoring method for settlement foundation layered casting concrete beam |
| CN113699890A (en) * | 2021-08-27 | 2021-11-26 | 上海市基础工程集团有限公司 | Automatic compensation method for temporary support elevation for bridge prefabricated assembly component |
| CN114561975A (en) * | 2022-02-28 | 2022-05-31 | 中铁十一局集团有限公司 | Integrative system of pouring of multilayer subway open cut station |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3882564A (en) * | 1973-09-24 | 1975-05-13 | Genie Civil Et De Tech Ind Soc | Process for construction of bridges, in particular motorway flyovers |
| CN201502165U (en) * | 2009-09-21 | 2010-06-09 | 中冶建工有限公司 | Falsework structure for multi-layer overpass synchronous construction |
| CN202139543U (en) * | 2011-07-13 | 2012-02-08 | 中国十九冶集团有限公司 | Bracket structure used for construction of continuous box girders |
| CN103382702A (en) * | 2013-07-11 | 2013-11-06 | 中国建筑第六工程局有限公司 | Cast-in-situ box grider bracket and constructing method thereof |
| CN103437279A (en) * | 2013-08-29 | 2013-12-11 | 中交二公局第一工程有限公司 | Overhead cast-in-place box beam pressure-bearing strut and construction technology thereof |
| CN205501840U (en) * | 2016-04-14 | 2016-08-24 | 浙江大学城市学院 | A braced system for construction of overpass cast -in -situ box girder |
-
2016
- 2016-04-14 CN CN201610229720.4A patent/CN105735139B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3882564A (en) * | 1973-09-24 | 1975-05-13 | Genie Civil Et De Tech Ind Soc | Process for construction of bridges, in particular motorway flyovers |
| CN201502165U (en) * | 2009-09-21 | 2010-06-09 | 中冶建工有限公司 | Falsework structure for multi-layer overpass synchronous construction |
| CN202139543U (en) * | 2011-07-13 | 2012-02-08 | 中国十九冶集团有限公司 | Bracket structure used for construction of continuous box girders |
| CN103382702A (en) * | 2013-07-11 | 2013-11-06 | 中国建筑第六工程局有限公司 | Cast-in-situ box grider bracket and constructing method thereof |
| CN103437279A (en) * | 2013-08-29 | 2013-12-11 | 中交二公局第一工程有限公司 | Overhead cast-in-place box beam pressure-bearing strut and construction technology thereof |
| CN205501840U (en) * | 2016-04-14 | 2016-08-24 | 浙江大学城市学院 | A braced system for construction of overpass cast -in -situ box girder |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223201A (en) * | 2016-07-26 | 2016-12-14 | 中南大学 | The method for correcting error of beam section bridge linear monitoring |
| CN106223201B (en) * | 2016-07-26 | 2018-06-26 | 中南大学 | The method for correcting error of beam section bridge linear monitoring |
| CN106988337A (en) * | 2017-04-20 | 2017-07-28 | 南京工业大学 | A kind of reinforcement means for being used to reduce bar shaped shallow foundation house differential settlement |
| CN106988337B (en) * | 2017-04-20 | 2019-02-01 | 南京工大桥隧与轨道交通研究院有限公司 | It is a kind of for reducing the reinforcement means of bar shaped shallow foundation house differential settlement |
| CN108981590A (en) * | 2018-06-13 | 2018-12-11 | 中铁隧道集团二处有限公司 | A kind of high-speed rail precast beam positioning system |
| CN109056438A (en) * | 2018-09-06 | 2018-12-21 | 上海市机械施工集团有限公司 | A kind of construction method of overhead road of city ring road transformation |
| CN109056438B (en) * | 2018-09-06 | 2021-02-23 | 上海市机械施工集团有限公司 | Construction method for transformation of urban elevated ramp |
| CN110181650A (en) * | 2019-06-03 | 2019-08-30 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of prefabricated case beam template synchronous jacking system and its control method |
| CN111551326A (en) * | 2020-05-28 | 2020-08-18 | 广西交科集团有限公司 | Displacement monitoring method for settlement foundation layered casting concrete beam |
| CN111551326B (en) * | 2020-05-28 | 2022-01-28 | 广西交科集团有限公司 | Displacement monitoring method for settlement foundation layered casting concrete beam |
| CN113699890A (en) * | 2021-08-27 | 2021-11-26 | 上海市基础工程集团有限公司 | Automatic compensation method for temporary support elevation for bridge prefabricated assembly component |
| CN114561975A (en) * | 2022-02-28 | 2022-05-31 | 中铁十一局集团有限公司 | Integrative system of pouring of multilayer subway open cut station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105735139B (en) | 2017-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105735139A (en) | Supporting system for construction of cast-in-situ box beam in overpass and construction method of box beam | |
| CN105421248B (en) | Large-Span Continuous girder span building up station turns and closure construction method | |
| CN106758841B (en) | A kind of whole construction process of the double rope face low-pylon cable-stayed bridges of double tower | |
| CN105648926B (en) | Large-Span Continuous girder span building up station rotation swivel construction method | |
| CN106702910A (en) | Main girder construction process for extradosed cable-stayed bridge with double towers and double cable planes | |
| CN101781878B (en) | Integral lifting template of main pylon of single-pylon cable-stayed bridge without dorsal cables and lifting construction method thereof | |
| CN102808383B (en) | Curved bridge counter-slope jacking construction process | |
| CN105155428B (en) | Across railway in operation large-scale prefabricated PC concrete continuous T beam construction method | |
| CN104594204B (en) | Urban light rail viaduct mountain type U beam Construction Supporting System and construction method | |
| KR100949601B1 (en) | Method for broadening width of existing bridge without Temporary road | |
| CN107905114A (en) | A kind of construction method of large span Successive interference cancellation | |
| CN105507168A (en) | Multi-span box girder integral ultrahigh alternate jacking construction system and method | |
| CN102296542A (en) | Method for constructing high pier capping beams | |
| KR100891961B1 (en) | The construction infrastructure the use road the martial art as a matter of bridge of the bridge which is old in the railroad or the railroad respects the induction event a method of construction which shifts the bridge and the system | |
| KR100571525B1 (en) | Expansion method of a bridge using concrete structure | |
| CN108979664A (en) | Existing subway tunnel based on mobile casting platform protects steel structure pouring construction method | |
| CN105568870A (en) | Triangle hanging basket suspended casting device used for overpass bridge construction and construction method thereof | |
| CN102286932B (en) | Construction method for off-site assembling and automatic mounting on bridge of mobile mould bridge abutment | |
| CN205662832U (en) | Under hold formula beiLei beam steel suspension bridge | |
| CN205501840U (en) | A braced system for construction of overpass cast -in -situ box girder | |
| CN205242278U (en) | A triangle string basket method is hanged and is watered device for deck bridge construction | |
| CN102704414A (en) | Construction method for jacking arched bridges | |
| KR20040004819A (en) | Method for changing steel bridge of supporting rail into concreat bridge | |
| CN106320192B (en) | A kind of beam section replacing and reinforcing method for large span concrete continuous beam bridge | |
| CN106245531B (en) | Steel structural bridge installation method is hung under bilateral derrick type |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170426 Termination date: 20210414 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |