CN102691266B - Construction method for ultrahigh combined support for bridge side span cast-in-situ section - Google Patents
Construction method for ultrahigh combined support for bridge side span cast-in-situ section Download PDFInfo
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- CN102691266B CN102691266B CN201210180448.7A CN201210180448A CN102691266B CN 102691266 B CN102691266 B CN 102691266B CN 201210180448 A CN201210180448 A CN 201210180448A CN 102691266 B CN102691266 B CN 102691266B
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- 238000010276 construction Methods 0.000 title claims abstract description 30
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 109
- 239000010959 steel Substances 0.000 claims abstract description 109
- 230000007704 transition Effects 0.000 claims abstract description 53
- 238000000034 method Methods 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000009432 framing Methods 0.000 description 3
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Abstract
The invention provides a construction method for an ultrahigh combined support for a bridge side span cast-in-situ section. The combined support comprises a beam column type support and two cantilever brackets, wherein upright posts of the beam column type support are fixedly connected with a bridge transition pier body through connecting rods; and the two cantilever brackets are fixed on the bridge transition pier body; bearing beams are arranged on the upright posts of the beam column type support and the cantilever brackets, and longitudinal beams are arranged on the bearing beams. The beam column type support is organically combined with the cantilever brackets, so that the combined support is strong in bearing capacity and wide in using height range and is suitable for T-shaped steel structures and cantilever beam side span cast-in-situ sections which are high in terrain clearance and are in complex geological conditions and severe climate environments.
Description
Technical field
The present invention relates to field of bridge construction, a kind of method that adopts an a kind of superelevation support to construct while being specifically related to construction of bridge T shaped steel structure or semi girder end bay cast-in-place section construction.
Background technology
Along with the encryption of highway and railway net, T-shaped firm structure and semi girder are applied and are become very general in bridge engineering, and T-shaped firm structure and semi girder end bay Cast-in-place Segment Support adopt floor stand more, and floor stand is divided into again full framing and beam-column type bracket.Full framing is generally applicable to the Cast-in-Situ Segment box girder construction that terrain clearance is less, and the Cast-in-Situ Segment case beam larger for terrain clearance generally adopts beam-column type bracket cast-in-place construction.Beam-column type bracket claims again limited bracket, stability is lower, when bridge construction can run into complicated geological conditions and harsh climate condition, as on NORTHWEST CHINA, Xinjiang and other places, monsoon is more and unexpected, moment, wind-force can reach more than 12 grades, and Cast-in-Situ Segment large for terrain clearance or superelevation adopts beam-column type bracket obviously can not meet security requirement.
Summary of the invention
The object of the present invention is to provide that a kind of stability is high, the superelevation stand construction method of high safety, meet for the larger bridge cast-in-place section construction requirement of terrain clearance.
For realizing the object of the invention, first a kind of superelevation sectional shelf-unit is provided, its technical scheme is as follows:
A bridge end bay Cast-in-Situ Segment superelevation sectional shelf-unit, is characterized in that: described sectional shelf-unit comprises a beam-column type bracket, and two cantilever brackets that are fixed on bridge transition pier pier shaft, wherein,
Described beam-column type bracket comprises four contour columns of four vertex positions of the rectangle that is positioned at horizontal direction, be respectively the first column, the second column, the 3rd column and the 4th column, each column fixes on the ground perpendicular to Qie Qi lower end, ground, and the upper end of each column is fixed with the husky cylinder of column steel; Between described the first column and the second column and the 3rd column, and the 4th between column and the second column and the 3rd column, by tranverse connecting rod, be welded to connect, between described the first column and the 4th column, and second between column and the 3rd column, by hound, be welded to connect; The first column of described beam-column type bracket and the 3rd column, be fixedly connected with bridge transition pier pier shaft by tranverse connecting rod respectively;
Described two cantilever brackets are contour to be fixed on bridge transition pier pier shaft, each cantilever bracket comprises a bracket, a tripod, described bracket utilization is embedded in the fining twisted steel in transition pier pier shaft, with nut, be fixed on transition pier pier shaft, one distribution beam is erected on the bracket of two brackets, is respectively arranged with the husky cylinder of bracket steel in distribution beam over against two bracket positions; Described tripod comprises that a horizontally disposed cross bar, a vertical pole, vertical with described cross bar are connected the brace of described vertical pole and cross bar, described vertical pole utilization is embedded in the fining twisted steel in transition pier pier shaft, with pressing beam and nut to be fixed on transition pier pier shaft, the lower end of vertical pole is supported on the husky cylinder of described bracket steel, the upper end of vertical pole and one end of described cross bar welding, the lower end of described brace and described vertical pole and described cross bar are welded to connect; Between the brace and vertical pole of described tripod, between brace and cross bar, and between brace and vertical pole and the link of cross bar, adopt support bar to be welded to connect;
The end face of the cross bar of the tripod of described two cantilever brackets flushes with the end face of the husky cylinder of column steel on described column, and the cross bar of one of them tripod is near described the first column and the second column, and with the straight line parallel at the first column and the second column place; The cross bar of another tripod is near described the 3rd column and the 4th column, and with the straight line parallel at described the 3rd column and the 4th column place;
Described sectional shelf-unit also comprises three spandrel girders, wherein on the cross bar of the first spandrel girder across the husky cylinder of the column steel on the second column and the 4th column and two tripods, on the cross bar of the second spandrel girder across the husky cylinder of the column steel on the first column and the 3rd column and two tripods, the 3rd spandrel girder is across above the cross bar at two tripods and vertical pole link; On described spandrel girder, be provided with the many longerons vertical with described spandrel girder.
Further, combinations thereof support also can comprise following characteristics:
The first column of described beam-column type bracket and the 3rd column, be fixedly connected with bridge transition pier pier shaft by tranverse connecting rod respectively;
Between the brace and vertical pole of described tripod, between brace and cross bar, and between brace and vertical pole and the link of cross bar, adopt support bar to be welded to connect;
The length of described tripod cross bar is more than or equal to described the second column and the 4th column to the distance of bridge transition pier pier shaft.
The present invention also provides a kind of bridge end bay Cast-in-Situ Segment superelevation sectional shelf-unit construction method, it is characterized in that:
(1) the 1st to n-1 of beam-column type bracket being installed saves: on the expansion basis of bridge transition pier pier shaft cushion cap, by four vertex positions that are positioned at the rectangle of horizontal direction, four root posts are installed, be respectively the first column, the second column, the 3rd column and the 4th column, every described column is connected to form by n root standard knot, the value of n is determined according to the predetermined altitude of sectional shelf-unit, and n >=2; Between the standard knot of every root post, by flange, connect; Every root post is fixed on the expansion basis of bridge transition pier pier shaft cushion cap perpendicular to horizontal plane and its lower end; Between described the first column and the second column and the 3rd column, and the 4th between column and the second column and the 3rd column, by tranverse connecting rod, be welded to connect, between described the first column and the 4th column, and second between column and the 3rd column, by hound, be welded to connect;
(2) two cantilever brackets are installed: on bridge transition pier pier shaft, utilization is embedded in two the contour brackets of fining twisted steel fixed installation in transition pier pier shaft, on two brackets, set up a distribution beam, the husky cylinder of bracket steel is set respectively over against two bracket positions in distribution beam, on the husky cylinder of two bracket steel, a tripod is installed respectively; Described tripod comprises that a horizontally disposed cross bar, a vertical pole, vertical with described cross bar are connected the brace of described vertical pole and cross bar; Described vertical pole utilization is embedded in to the fining twisted steel in transition pier pier shaft, with pressing beam and nut to be fixed on transition pier pier shaft, the lower end of vertical pole is supported on the husky cylinder of described bracket steel, the upper end of vertical pole and one end of described cross bar welding, the lower end of brace and described vertical pole and the other end of described cross bar are welded to connect; The end face of cross bar flushes with the predetermined altitude of sectional shelf-unit, and the cross bar of a tripod is near described the first column and the second column, and with the straight line parallel at the first column and the second column place; The cross bar of another tripod is near described the 3rd column and the 4th column, and with the straight line parallel at described the 3rd column and the 4th column place;
(3) the n joint of beam-column type bracket is installed: the n root standard knot of every root post is installed, and the husky cylinder of column steel is installed at its top; The end face of the husky cylinder of column steel flushes with the cross bar end face of bracket tripod;
(4) spandrel girder and longeron are installed: wherein on the cross bar of the first spandrel girder across the husky cylinder of the column steel on the second column and the 4th column and two tripods, on the cross bar of the second spandrel girder across the husky cylinder of the column steel on the first column and the 3rd column and two tripods, the 3rd spandrel girder is across above the cross bar at two tripods and vertical pole link; On spandrel girder, the longeron vertical with described spandrel girder is set;
(5) sectional shelf-unit is carried out to the precompressed of lifting jack steel twisted wire counter-force, adjusting pole camber;
(6) Cast-in-Situ Segment template is installed on sectional shelf-unit, carries out Cast-in-Situ Segment concrete construction and end bay closure section construction.
The present invention combines floor stand and bracket, and with independent beam-column type bracket comparison, supporting capacity of the present invention is strong, and operating altitude range is large, low to landform Geological Condition Requirement, and foundation treatment engineering amount is little; With full framing comparison, weight of the present invention is little, and construction loss is few, and nonelastic deformation is little, can greatly reduce material input operating expenses low, and repeat usage is high, and technical-economic index is better.
Sectional shelf-unit of the present invention, system architecture highly versatile, assembling simple and fast, nonelastic deformation is little, quality of connection is reliable, working security is high, is applicable to that terrain clearance is large, complex geologic conditions, severe T-shaped firm structure and the semi girder end bay Cast-in-Situ Segment of climatic environment, and the cast-in-place constructions such as high pier cast-in-situ box girder, soft clay area cast-in-situ box girder and Cable stayed Bridge Main Tower crossbeam are also had to using value comparatively widely.
Accompanying drawing explanation
Fig. 1 is that the column of beam-column type bracket of the present invention is laid mode plane structure schematic diagram
Fig. 2 is the front elevation drawing of beam-column type bracket of the present invention
Fig. 3 is the lateral view of beam-column type bracket of the present invention
Fig. 4 is cantilever bracket structural representation of the present invention
Fig. 5 is front elevation drawing of the present invention
Fig. 6 is side-looking structural representation of the present invention
Fig. 7 is plan structure schematic diagram of the present invention
Fig. 8 is the structural representation of the husky cylinder of steel
Fig. 9 is limit of the present invention bridge span Cast-in-Situ Segment superelevation sectional shelf-unit construction method flow chart
The specific embodiment
A kind of bridge end bay Cast-in-Situ Segment of the present invention superelevation sectional shelf-unit, comprises a beam-column type bracket 1, and two cantilever brackets 3 that are fixed on bridge transition pier pier shaft 2;
As shown in Figure 1, Figure 2, Figure 3 shows, described beam-column type bracket 1 comprises four contour columns of four vertex positions of the rectangle that is positioned at horizontal direction, be respectively the first column 11, the second column 12, the 3rd column 13 and the 4th column 14, each column fixes on the ground perpendicular to Qie Qi lower end, ground, is normally fixed on the expansion basis of bridge transition pier cushion cap.The upper end of each column is fixedly installed the husky cylinder 4 of column steel, and the general and column upper end of the husky cylinder of steel is welded and fixed; Between described the first column 11 and the second column 12 and the 3rd column 13, and the 4th between column 14 and the second column 12 and the 3rd column 13, by tranverse connecting rod 101, be welded to connect, between described the first column 11 and the 4th column 14, and second between column 12 and the 3rd column 13, by hound 102, be welded to connect.
The present invention also comprises two cantilever brackets 3 that are fixed on bridge transition pier pier shaft 2, and shown in Fig. 4 is the lateral view of one of them cantilever bracket 3, and another lateral view is identical.Described two cantilever brackets 3 are contour to be fixed on bridge transition pier pier shaft 2, and each cantilever bracket 3 comprises a bracket 31, a tripod 32.In bridge transition pier pier shaft 2, have pre-buried many fining twisted steels 33, pier shaft is exposed in the end of fining twisted steel 33, is convenient to be connected with miscellaneous part.Described bracket 31 utilizes and is embedded in the fining twisted steel 33 in transition pier pier shaft, with nut 34, is fixed on transition pier pier shaft 2.One distribution beam 35 is erected on the bracket 31 of two brackets, in distribution beam 35, over against two bracket positions, is respectively arranged with the husky cylinder 36 of bracket steel.Described tripod 32 comprises that vertical pole that a horizontally disposed cross bar 322, is vertical with described cross bar 321, connects the brace 323 of described vertical poles 321 and cross bar 322.Described vertical pole 321 utilizes and is embedded in the fining twisted steel in transition pier pier shaft, with pressing beam 37 and nut to be fixed on transition pier pier shaft 2, the lower end of vertical pole 321 is supported on the husky cylinder 36 of described bracket steel, one end welding of the upper end of vertical pole 321 and described cross bar 322, described brace 323 is welded to connect with lower end and the described cross bar 322 of described vertical pole 321.The connecting portion of brace and cross bar, can be the other end of cross bar, can be also the position of the close other end on cross bar.
As shown in Fig. 5, Fig. 6, Fig. 7, cross bar 322 end faces of the tripod 32 of two cantilever brackets 3 of the present invention flush with the end face of the husky cylinder 4 of column steel on described each column, the cross bar 322 of one of them tripod is pressed close to described the first column 11 and the second column 12, and with the straight line parallel at the first column 11 and the second column 12 places; The cross bar 322 of another tripod is pressed close to described the 3rd column 13 and the 4th column 14, and with the straight line parallel at described the 3rd column 13 and the 4th column 14 places.
The present invention also comprises three spandrel girders, wherein on the cross bar 322 of the first spandrel girder 51 across the husky cylinder of the column steel on the second column 12 and the 4th column 14 4 and two tripods, on the cross bar 322 of the second spandrel girder 52 across the husky cylinder of steel on the first column 11 and the 3rd column 13 4 and two tripods, the 3rd spandrel girder 53 is across above the link of the cross bar 322 at two bracket tripods and vertical pole 321; On described each spandrel girder, be provided with the many longerons 6 vertical with described each spandrel girder.The quantity of longeron 6 is generally more than 10.
As shown in Figure 6, for increasing structural stability of the present invention, the first column 11 of beam-column type bracket 1 of the present invention and the 3rd column 13, can be fixedly connected with bridge transition pier pier shaft 2 by tranverse connecting rod 101 respectively.Tranverse connecting rod 101 can utilize the interior default fining twisted steel of bridge transition pier pier shaft 2 to realize with to be connected bridge transition pier pier shaft 2 fixing by welding.
The present invention is transportation, installation, convenient disassembly, and the every root post that forms beam-column type bracket 1 is connected to form by least two standard knots, between standard knot, by flange 7, connects.When support need to reach high height, column can adopt many standard knots to connect, and therefore by this structure, height of the present invention can be adjusted flexibly, to adapt to more high or ultra high cast-in-place section construction requirement.
As shown in Figure 4, between the brace 323 and vertical pole 321 of tripod 32 of the present invention, between brace 323 and cross bar 322, and between brace 323 and vertical pole and the welded ends of cross bar, can adopt support bar 324 to be welded to connect, to strengthen stability and the anti-pressure ability of tripod 32.
The present invention is provided with the husky cylinder 36 of bracket steel below the vertical pole of the tripod of cantilever bracket, is provided with the husky cylinder 4 of column steel in the upper end of each column, is convenient to build masterplate unloading.
The husky cylinder of steel is a kind of piston type tube-in-tube structure, as shown in Figure 8, to take the husky barrel structure schematic diagram of steel that the structure of the husky cylinder 4 of column steel is example, comprise steel cylinder 41 and lower steel cylinder 42, the bottom 411 of upper steel cylinder 41 and the bottom 421 of lower steel cylinder 42 are all sealed, in lower steel cylinder 42, sand 43 is housed, the bottom 411 of upper steel cylinder 41 is positioned at lower steel cylinder 42 and is supported on the sand 43 of lower steel cylinder, certain distance is arranged at upper steel cylinder bottom 411 and 421 of lower steel cylinder bottoms, gap between the inwall of the outer wall of upper steel cylinder 41 and lower steel cylinder 42, adopt pitch or concrete sealing, upper steel cylinder top is provided with top board 412, the sidewall below of lower steel cylinder 42 is provided with Lou husky mouthful 422, leak husky mouthful 422 and be provided with valve 423.Open the Lou valve 423 of husky mouthful 422, the sand in lower steel cylinder 42 flows out, and upper steel cylinder 41 declines under deadweight and load pressure effect, therefore by lower steel cylinder, puts sand, can make the height of the husky cylinder of steel reduce.The structure of the husky cylinder 36 of bracket steel is identical with the husky cylinder of above-mentioned column steel 4 structures.The present invention is when pouring construction, sectional shelf-unit top carrying template, after Cast-in-Situ Segment pouring construction, open the husky mouthful valve of leakage on the husky cylinder 36 of bracket steel and the husky cylinder 4 of column steel, along with sand in the husky cylinder of steel flows out, the husky cylinder of steel highly reduces, and sectional shelf-unit upper height declines, and is convenient to the template unloading on sectional shelf-unit top.
Fig. 9 is limit of the present invention bridge span Cast-in-Situ Segment superelevation sectional shelf-unit construction method flow chart, and detailed process is as follows:
(1) the 1st to n-1 of beam-column type bracket being installed saves: on the expansion basis of bridge transition pier pier shaft cushion cap, by four vertex positions that are positioned at the rectangle of horizontal direction, four root posts are installed, be respectively the first column, the second column, the 3rd column and the 4th column, every described column is connected to form by n root standard knot, the value of n is determined according to the predetermined altitude of sectional shelf-unit, and n >=2; Between the standard knot of every root post, by flange, connect; Every root post is fixed on the expansion basis of bridge transition pier pier shaft cushion cap perpendicular to horizontal plane and its lower end; Between described the first column and the second column and the 3rd column, and the 4th between column and the second column and the 3rd column, by tranverse connecting rod, be welded to connect, between described the first column and the 4th column, and second between column and the 3rd column, by hound, be welded to connect;
(2) two cantilever brackets are installed: on bridge transition pier pier shaft, utilization is embedded in two the contour brackets of fining twisted steel fixed installation in transition pier pier shaft, on two brackets, set up a distribution beam, the husky cylinder of bracket steel is set respectively over against two bracket positions in distribution beam, on the husky cylinder of two bracket steel, a tripod is installed respectively; Described tripod comprises that a horizontally disposed cross bar, a vertical pole, vertical with described cross bar are connected the brace of described vertical pole and cross bar; Described vertical pole utilization is embedded in to the fining twisted steel in transition pier pier shaft, with pressing beam and nut to be fixed on transition pier pier shaft, the lower end of vertical pole is supported on the husky cylinder of described bracket steel, the upper end of vertical pole and one end of described cross bar welding, the lower end of brace and described vertical pole and the other end of described cross bar are welded to connect; The end face of cross bar flushes with the predetermined altitude of sectional shelf-unit, and the cross bar of a tripod is near described the first column and the second column, and with the straight line parallel at the first column and the second column place; The cross bar of another tripod is near described the 3rd column and the 4th column, and with the straight line parallel at described the 3rd column and the 4th column place;
(3) the n joint of beam-column type bracket is installed: the n root standard knot of every root post is installed, and the husky cylinder of column steel is installed at its top; The end face of the husky cylinder of column steel flushes with the cross bar end face of bracket tripod;
(4) spandrel girder and longeron are installed: wherein on the cross bar of the first spandrel girder across the husky cylinder of the column steel on the second column and the 4th column and two tripods, on the cross bar of the second spandrel girder across the husky cylinder of the column steel on the first column and the 3rd column and two tripods, the 3rd spandrel girder is across above the cross bar at two tripods and vertical pole link; On spandrel girder, the longeron vertical with described spandrel girder is set;
(5) sectional shelf-unit is carried out to the precompressed of lifting jack steel twisted wire counter-force, adjusting pole camber;
(6) Cast-in-Situ Segment template is installed on sectional shelf-unit, carries out Cast-in-Situ Segment concrete construction and end bay closure section construction.
Further, said method also can comprise the following steps:
(7), after Cast-in-Situ Segment concrete construction and end bay closure section construction complete, the husky cylinder of column steel and the husky cylinder of bracket steel are put sand, reduce sectional shelf-unit height, to remove Cast-in-Situ Segment template and sectional shelf-unit.
When said method is specifically implemented, the first column of described beam-column type bracket and the 3rd column, can be fixedly connected with bridge transition pier pier shaft by tranverse connecting rod respectively.
When said method is specifically implemented, between the brace and vertical pole of described tripod, between brace and cross bar, and between brace and vertical pole and the link of cross bar, can adopt support bar to be welded to connect.
In said method, the length of described tripod cross bar should be more than or equal to described the second column and the 4th column to the distance of bridge transition pier pier shaft.
Claims (8)
1. a bridge end bay Cast-in-Situ Segment superelevation sectional shelf-unit, is characterized in that: described sectional shelf-unit comprises a beam-column type bracket, and two cantilever brackets that are fixed on bridge transition pier pier shaft, wherein,
Described beam-column type bracket comprises four contour columns of four vertex positions of the rectangle that is positioned at horizontal direction, be respectively the first column, the second column, the 3rd column and the 4th column, every described column is connected to form by least 2 standard knots, between standard knot, by flange, connects; Every root post fixes on the ground perpendicular to Qie Qi lower end, ground, and the upper end of every root post is provided with the husky cylinder of column steel; Between described the first column and the second column and the 3rd column, and the 4th between column and the second column and the 3rd column, by tranverse connecting rod, be welded to connect, between described the first column and the 4th column, and second between column and the 3rd column, by hound, be welded to connect; The first column of described beam-column type bracket and the 3rd column, be fixedly connected with bridge transition pier pier shaft by tranverse connecting rod respectively;
Described two cantilever brackets are contour to be fixed on bridge transition pier pier shaft, each cantilever bracket comprises a bracket, a tripod, described bracket utilization is embedded in the fining twisted steel in transition pier pier shaft, with nut, be fixed on transition pier pier shaft, one distribution beam is erected on the bracket of two brackets, is respectively arranged with the husky cylinder of bracket steel in distribution beam over against two bracket positions; Described tripod comprises that a horizontally disposed cross bar, a vertical pole, vertical with described cross bar are connected the brace of described vertical pole and cross bar, described vertical pole utilization is embedded in the fining twisted steel in transition pier pier shaft, with pressing beam and nut to be fixed on transition pier pier shaft, the lower end of vertical pole is supported on the husky cylinder of described bracket steel, the upper end of vertical pole and one end of described cross bar welding, the lower end of described brace and described vertical pole and described cross bar are welded to connect; Between the brace and vertical pole of described tripod, between brace and cross bar, and between brace and vertical pole and the link of cross bar, adopt support bar to be welded to connect;
The end face of the cross bar of the tripod of described two cantilever brackets flushes with the end face of the husky cylinder of column steel on described column, and the cross bar of one of them tripod is near described the first column and the second column, and with the straight line parallel at the first column and the second column place; The cross bar of another tripod is near described the 3rd column and the 4th column, and with the straight line parallel at described the 3rd column and the 4th column place;
Described sectional shelf-unit also comprises three spandrel girders, wherein on the cross bar of the first spandrel girder across the husky cylinder of the column steel on the second column and the 4th column and two tripods, on the cross bar of the second spandrel girder across the husky cylinder of the column steel on the first column and the 3rd column and two tripods, the 3rd spandrel girder is across above the cross bar at two tripods and vertical pole link; On described spandrel girder, be provided with the many longerons vertical with described spandrel girder.
2. sectional shelf-unit according to claim 1, it is characterized in that: the husky cylinder of described column steel and the husky cylinder of bracket steel include steel cylinder and lower steel cylinder, the bottom of upper steel cylinder and lower steel cylinder bottom seal with Plate Welding, in lower steel cylinder, sand is housed, upper steel cylinder bottom is positioned at lower steel cylinder and is supported on the sand of lower steel cylinder, between upper steel cylinder bottom and doffing bottom, there is certain distance, gap between upper steel cylinder outer wall and lower steel cylinder inwall adopts pitch or concrete sealing, upper steel cylinder top is provided with top board, the sidewall below of lower steel cylinder is provided with Lou husky mouthful, leak husky mouth and be provided with valve.
3. sectional shelf-unit according to claim 1, is characterized in that: the length of described tripod cross bar is more than or equal to described the second column and the 4th column to the distance of bridge transition pier pier shaft.
4. a bridge end bay Cast-in-Situ Segment superelevation sectional shelf-unit construction method, is characterized in that:
(1) the 1st to n-1 of beam-column type bracket being installed saves: on the expansion basis of bridge transition pier pier shaft cushion cap, by four vertex positions that are positioned at the rectangle of horizontal direction, four root posts are installed, be respectively the first column, the second column, the 3rd column and the 4th column, every described column is connected to form by n root standard knot, the value of n is determined according to the predetermined altitude of sectional shelf-unit, and n >=2; Between the standard knot of every root post, by flange, connect; Every root post is fixed on the expansion basis of bridge transition pier pier shaft cushion cap perpendicular to horizontal plane and its lower end; Between described the first column and the second column and the 3rd column, and the 4th between column and the second column and the 3rd column, by tranverse connecting rod, be welded to connect, between described the first column and the 4th column, and second between column and the 3rd column, by hound, be welded to connect;
(2) two cantilever brackets are installed: on bridge transition pier pier shaft, utilization is embedded in two the contour brackets of fining twisted steel fixed installation in transition pier pier shaft, on two brackets, set up a distribution beam, the husky cylinder of bracket steel is set respectively over against two bracket positions in distribution beam, on the husky cylinder of two bracket steel, a tripod is installed respectively; Described tripod comprises that a horizontally disposed cross bar, a vertical pole, vertical with described cross bar are connected the brace of described vertical pole and cross bar; Described vertical pole utilization is embedded in to the fining twisted steel in transition pier pier shaft, with pressing beam and nut to be fixed on transition pier pier shaft, the lower end of vertical pole is supported on the husky cylinder of described bracket steel, the upper end of vertical pole and one end of described cross bar welding, the lower end of brace and described vertical pole and the other end of described cross bar are welded to connect; The end face of cross bar flushes with the predetermined altitude of sectional shelf-unit, and the cross bar of a tripod is near described the first column and the second column, and with the straight line parallel at the first column and the second column place; The cross bar of another tripod is near described the 3rd column and the 4th column, and with the straight line parallel at described the 3rd column and the 4th column place;
(3) the n joint of beam-column type bracket is installed: the n root standard knot of every root post is installed, and the husky cylinder of column steel is installed at its top; The end face of the husky cylinder of column steel flushes with the cross bar end face of bracket tripod;
(4) spandrel girder and longeron are installed: wherein on the cross bar of the first spandrel girder across the husky cylinder of the column steel on the second column and the 4th column and two tripods, on the cross bar of the second spandrel girder across the husky cylinder of the column steel on the first column and the 3rd column and two tripods, the 3rd spandrel girder is across above the cross bar at two tripods and vertical pole link; On spandrel girder, the longeron vertical with described spandrel girder is set;
(5) sectional shelf-unit is carried out to the precompressed of lifting jack steel twisted wire counter-force, adjusting pole camber;
(6) Cast-in-Situ Segment template is installed on sectional shelf-unit, carries out Cast-in-Situ Segment concrete construction and end bay closure section construction.
5. method according to claim 4, is characterized in that, described method further comprises:
(7), after Cast-in-Situ Segment concrete construction and end bay closure section construction complete, the husky cylinder of column steel and the husky cylinder of bracket steel are put sand, reduce sectional shelf-unit height, to remove Cast-in-Situ Segment template and sectional shelf-unit.
6. according to the method described in claim 4 or 5, it is characterized in that: the first column of described beam-column type bracket and the 3rd column, be fixedly connected with bridge transition pier pier shaft by tranverse connecting rod respectively.
7. according to the method described in claim 4 or 5, it is characterized in that: between the brace and vertical pole of described tripod, between brace and cross bar, and between brace and vertical pole and the link of cross bar, adopt support bar to be welded to connect.
8. according to the method described in claim 4 or 5, it is characterized in that: the length of described tripod cross bar is more than or equal to described the second column and the 4th column to the distance of bridge transition pier pier shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210180448.7A CN102691266B (en) | 2012-06-03 | 2012-06-03 | Construction method for ultrahigh combined support for bridge side span cast-in-situ section |
Applications Claiming Priority (1)
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| CN103194982B (en) * | 2013-03-25 | 2015-02-25 | 中交路桥建设有限公司 | Construction method for short cantilever support at bridge side span cast-in-situ segment |
| CN104929049B (en) * | 2015-06-15 | 2018-03-02 | 许昌学院 | Road and bridge combined type construction method |
| CN107090772B (en) * | 2017-04-13 | 2019-02-22 | 中铁四局集团有限公司 | A kind of construction method of the especially big cast-in-place boom support of cable-stayed bridge end bay |
| CN108517780B (en) * | 2018-04-04 | 2019-11-26 | 武汉理工大学 | Composite beam steel reinforced concrete joining section consolidates and micromatic setting |
| CN109208488B (en) * | 2018-10-24 | 2021-01-15 | 中国水利水电第八工程局有限公司 | High pier pre-pressing device with high combined weight at high altitude and construction method thereof |
| CN110409306A (en) * | 2019-07-23 | 2019-11-05 | 中国十七冶集团有限公司 | A kind of construction method that continuous rigid frame bridge end bay closes up |
| CN110409320A (en) * | 2019-08-21 | 2019-11-05 | 广西路建工程集团有限公司 | A kind of the concrete cast-in-situ bracket and its construction method of adjustable slope |
| CN111762657B (en) * | 2020-06-10 | 2022-01-18 | 湖南怀奥机电有限公司 | Construction elevator support standard knot that prevents that heeling collapses |
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