CN110820568B - Method for mounting bailey truss of small-radius curve box girder bridge - Google Patents
Method for mounting bailey truss of small-radius curve box girder bridge Download PDFInfo
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- CN110820568B CN110820568B CN201911005585.5A CN201911005585A CN110820568B CN 110820568 B CN110820568 B CN 110820568B CN 201911005585 A CN201911005585 A CN 201911005585A CN 110820568 B CN110820568 B CN 110820568B
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Abstract
The invention provides a method for installing a small-radius curve box girder bridge bailey truss, which comprises the following steps of: determining the arrangement positions of the strip foundations in each span beam; the curved box girder bridge includes: at least two bridge beams; arranging, namely checking and arranging the position of the bailey frames in each span beam according to the arrangement position and design and specification requirements of each strip foundation in each span beam; assembling, namely assembling the Bailey sheets in each span beam on the ground according to the arrangement mode of the Bailey frames; and mounting, namely hoisting the assembled bailey frames of the cross beams to a preset mounting position and mounting. According to the method, the arrangement position of the strip foundation in each span beam in the curved box girder bridge is determined, so that the strip foundation can adapt to the curved bridge type of the curved box girder bridge, the Bailey truss is arranged according to the arrangement position, the design and standard requirements of the strip foundation and the curved bridge type, the radian of the Bailey truss is matched with the curved box girder bridge type, and the installation process is simple and convenient.
Description
Technical Field
The invention relates to the technical field of Bailey frames, in particular to a Bailey frame installation method for a small-radius curve box girder bridge.
Background
In the construction of a cast-in-place box girder bridge for road construction, a steel pipe column bailey bracket is generally adopted as a bracket. The steel pipe column bailey bracket has the advantages that the requirement on ground treatment is lower than that of a full scaffold, the erection is fast, and the traffic space on the ground can be kept. However, when the steel pipe column bailey truss support is erected on a small-radius curve bridge, the bridge shape is a curve, the strip-shaped foundation and the I-shaped steel distribution beam are all straight lines, and the bailey pieces are connected in a horizontal socket mode and also belong to straight lines, so that the strip-shaped foundation, the I-shaped steel distribution beam and the bailey pieces cannot be matched with the curved bridge shape. Generally speaking, the bailey frames are arranged under the curved bridge, and the common method is to lengthen the strip foundation, arrange a plurality of bailey frames or insert the scaffold, so that the engineering cost is increased, and meanwhile, the bailey frames cannot be well matched with the curved bridge.
Disclosure of Invention
In view of the above, the invention provides a method for installing a small-radius curve box girder bridge bailey truss, and aims to solve the problem that a small-radius curve bridge cannot be matched with a curve bridge type when a steel pipe column bailey truss bracket is erected in the prior art.
The invention provides a method for installing a small-radius curve box girder bridge bailey truss, which comprises the following steps of: determining the arrangement positions of the strip foundations in each span beam; wherein, curved box girder bridge includes: at least two bridge beams; arranging, namely checking and arranging the position of the bailey frames in each span beam according to the arrangement position and design and specification requirements of each strip foundation in each span beam; assembling, namely assembling the Bailey sheets in each span beam on the ground according to the arrangement mode of the Bailey frames; and mounting, namely hoisting the assembled bailey frames of the cross beams to a preset mounting position and mounting.
Further, in the method for installing the small-radius curve box girder bridge bailey truss, the determining step further includes: determining a substep, namely determining a starting point, an end point and a contour line of each span beam; and a segmentation substep, segmenting each span beam, and determining the position corresponding to the segmentation line of each segment in each span beam as the arrangement position of each strip foundation.
Further, in the method for installing the small radius curve box girder bridge bailey truss, the determining substep further includes: determining the central line of each span beam according to design requirements; respectively determining the positions of two adjacent pier bodies in each span beam after moving a preset distance to the center of the beam as a starting point and an end point; and determining the contour line of each span beam according to the width, the central line, the starting point and the end point of each span beam.
Further, in the method for installing the small-radius curve box girder bridge bailey truss, the preset distance is 50 cm.
Further, in the method for installing the small radius curve box girder bridge bailey truss, the sub-step of segmenting further includes: determining the number of segments per span; and determining each segmentation point on the central line of each span beam according to the number of segments, and determining the position of an extension line of the central line of each span beam and the extension line of the connecting line between the segmentation points on the beam, which corresponds to the contour line of the beam, as the arrangement position of each strip foundation.
Further, in the method for installing the small-radius curve box girder bridge bailey frames, in the arranging step, when the bailey frames are checked, the length of the bailey frames is determined according to the outermost arc length in the contour line of each span beam.
Further, in the method for installing the bailey frames of the small-radius curve box girder bridge, in the assembling step, a plurality of bailey pieces in each section of each span beam are assembled, then the assembled bailey pieces in each section are assembled and fixed to form the bailey frame of one span beam, and the step is repeated to sequentially assemble the bailey frames in the other span beams.
Further, in the method for installing the small-radius curve box girder bridge bailey frames, any two adjacent bailey pieces are connected in a folding direction through the connecting mechanism, so that the radian of each assembled bailey piece is matched with the radian of the corresponding girder.
Further, in the method for installing the bailey truss for the small radius curve box girder bridge, each connecting mechanism comprises: the device comprises a fastener and a cylinder body with one open end and the other closed end; the closed end of the cylinder is connected with the female end of one of the two adjacent Bailey pieces; the male head of the other one of the two adjacent bailey pieces is inserted into the barrel from the opening end of the barrel, and the male head of the bailey piece is rotatably connected with the barrel; the fastener is used for fastening the male head of the bailey piece after the male head of the bailey piece rotates to a preset angle.
Further, in the method for installing the small-radius curve box girder bridge bailey frames, the two opposite side walls of the cylinder are outwards provided with the extension plates from the closed end, and the two extension plates are in one-to-one correspondence with the two truss side edges of the corresponding female ends of the bailey pieces and are connected with the two truss side edges through bolts.
According to the invention, the arrangement position of each strip foundation in each span beam in the curved box girder bridge is firstly determined, so that each strip foundation can adapt to the curved bridge type of the curved box girder bridge, and the Bailey frames are arranged according to the arrangement position, the design and the standard requirement of each strip foundation and the curved bridge type, so that the radian of the Bailey frames is matched with the bridge type of the curved box girder bridge, thereby solving the problem that the Bailey frames cannot be matched with the curved bridge type when the steel pipe column Bailey frame support is erected on the curved bridge with a small radius in the prior art.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart of a method for installing a bailey truss for a small radius curve box girder bridge according to an embodiment of the present invention;
fig. 2 is a flowchart of a determining step in the method for installing a small-radius curve box girder bridge bailey truss according to the embodiment of the present invention;
fig. 3 is a flowchart of a substep of determining in a method for installing a small radius curved box girder bridge bailey truss according to an embodiment of the present invention;
fig. 4 is a flow chart of a sub-step of a small radius curve box girder bridge bailey frame installation method according to an embodiment of the present invention;
fig. 5 is a schematic top view of a span beam in the method for installing a small radius curve box girder bridge bailey truss according to the embodiment of the present invention;
fig. 6 is a schematic structural diagram of connection of two bailey pieces in the method for installing the bailey frames of the small radius curve box girder bridge according to the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a connecting mechanism in the method for installing the small-radius curve box girder bridge bailey truss according to the embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, fig. 1 is a flowchart of a method for installing a small radius curve box girder bridge bailey truss according to an embodiment of the present invention. As shown in the figure, the installation method of the small-radius curve box girder bridge bailey truss comprises the following steps:
a determining step S1, wherein the arrangement position of each strip foundation in each span beam is determined; wherein, curved box girder bridge includes: at least two bridge members.
Specifically, at least two span beams are assembled together to form a curved box girder bridge, and each span beam is arc-shaped and has a certain radian. The bottom of each span beam is supported by two pier bodies, and the two pier bodies are respectively arranged at the head end and the tail end of the span beam. The strip foundations are installation foundations of the bailey frames, and each strip foundation is linear and each span beam is arc-shaped, so that the arrangement position of each strip foundation under each span beam is determined firstly, and the bailey frames are convenient to install subsequently. Each strip foundation is perpendicular to the central line of each span beam, and the arrangement position of each strip foundation can be determined according to the central line, the contour line and the number of sections of each span beam.
In a specific implementation, a plurality of strip foundations may be provided in each span beam, and the arrangement positions of the strip foundations in each span beam are arranged according to the determining step S1.
In specific implementation, when the strip foundations are arranged, the strip foundations are of an integral strip shape, and if obstacles are found at the arrangement positions, the strip foundations can be segmented, or the strip foundations can be arranged in an independent expanded foundation mode.
And an arrangement step S2, checking and arranging the positions of the bailey frames in each span beam according to the arrangement positions and the design and specification requirements of the strip foundations in each span beam.
Specifically, according to a design drawing and a specification, calculating related loads and the arrangement position of the strip foundation in the determining step S1, and checking and arranging the template, the flitch, the distribution channel steel, the bailey frame, the i-steel distribution beam, the steel pipe column and each strip foundation in each span beam from top to bottom. And when the Bailey frames are checked, determining the length of the Bailey frames according to the outermost arc length in the contour line of each span beam.
During specific implementation, for each span beam, all the strip foundations are arranged from bottom to top, all the strip foundations are arranged at the lowest part of each span beam, the upper parts of all the strip foundations are provided with steel pipe columns and I-shaped steel distribution beams, the upper parts of the I-shaped steel distribution beams are bailey frames, the upper parts of the bailey frames are provided with distribution channel steel and battens, and templates are arranged on the battens. As the template, the battens and the distribution channel steel are all stress structures of the bailey frames, the load of the box girder is borne, and checking calculation must be carried out according to the standard requirements. And each strip foundation, the steel pipe column and the I-steel distribution beam are support structures at the lower part of the bailey truss and need to be checked.
In specific implementation, when the Bailey frames are checked, the weights of the templates, the battens, the distribution channel steel and the like and the loads of the Bailey frames need to be counted, and the weights and the loads are used as the calculated loads of the Bailey frames, so that the number and the arrangement mode of the Bailey frames can be determined conveniently.
And an assembling step S3, assembling the Bailey pieces in each span beam on the ground according to the arrangement mode of the Bailey frames.
Specifically, according to the arrangement manner of the bailey frames determined in the arrangement step S2, a plurality of bailey pieces in each span beam are assembled on the ground to form a bailey frame of a span beam. And then assembling the bailey frames of the cross beams in sequence.
And an installation step S4, hoisting the assembled bailey frames of the cross beams to a preset installation position, and installing.
Specifically, the assembled Bailey frames of the cross beams are hoisted to the preset installation positions of the I-shaped steel distribution beams by using a crane, and the Bailey frames of the cross beams are installed and fixed, so that the Bailey frames of the box girder bridge with the small radius curve are installed.
More specifically, each span beam is installed from bottom to top, and one of the span beams is taken as an example for description, and each strip foundation in the span beam is installed according to the arrangement position. And then, mounting the steel pipe column and the I-shaped steel distribution beam on the strip foundation. And finally, mounting the Bailey frames on the I-beam distribution beam to complete the mounting of the Bailey frame of one span beam, and sequentially mounting the Bailey frames on the other beams according to the method.
In the concrete implementation, distribution channel steel and battens are further installed on the upper portion of the bailey truss of each span beam, so that the integral installation of the support system of each span beam is formed.
It can be seen that, in this embodiment, the arrangement position of each bar-shaped foundation in each span in the curved box girder bridge is firstly determined, so that each bar-shaped foundation can adapt to the curved bridge type of the curved box girder bridge, and the bailey frames are arranged according to the arrangement position and design of each bar-shaped foundation, the specification requirement and the curved bridge type, so that the radian of the bailey frames is matched with the bridge type of the curved box girder bridge, thereby solving the problem that the bailey frames cannot be matched with the curved bridge type when the steel pipe column bailey frame support is erected on the small-radius curved bridge in the prior art, and meanwhile, the bailey frames are assembled on the ground, and then the assembled bailey frames are hoisted, so that the installation process is simple and convenient.
Referring to fig. 2, fig. 2 is a flowchart of a determining step in the method for installing the small radius curve box girder bridge bailey truss according to the embodiment of the present invention. The determination step S1 further includes:
the determining substep S11 determines the start point, end point, and contour line of each span.
Specifically, referring to fig. 3, the step further includes:
and step S111, determining the center line of each span beam according to design requirements. Specifically, referring to fig. 5, a centerline L1 for each span is determined from the design drawing, and the centerline L1 can be drawn on the drawing.
And step S112, respectively determining the positions of two adjacent pier bodies in each span beam after moving a preset distance to the center of the beam as a starting point and an end point. Specifically, the bottom of every span roof beam is supported by two pier shafts, and two pier shafts are adjacent to each other to, the position of two pier shafts is located two tip of every span roof beam respectively. The method for determining the starting point and the end point of each span beam is the same, and a span beam is taken as an example for introduction: referring to fig. 5, a position of one of the pier bodies is determined as a starting point a after moving a preset distance to the center of the beam, and a position of the other pier body is determined as an ending point B after moving a preset distance to the center of the beam.
In specific implementation, the preset distance may be determined according to actual conditions, and this embodiment does not limit this. Preferably, the predetermined distance is 50 cm.
And step S113, determining the contour line of each span beam according to the width, the center line, the starting point and the end point of each span beam. Specifically, the contour line of each bridge is determined according to the design width of each bridge, the center line L1, the starting point A and the end point B.
And a segmentation substep S12, segmenting each span beam, and determining the position corresponding to the segmentation line of each segment in each span beam as the arrangement position of each strip foundation.
Specifically, referring to fig. 4, the segmentation sub-step S12 further includes:
step S121, the number of segments per span beam is determined. Specifically, the number of segments per span beam is determined according to the field situation and the design requirements, such as the width of a door opening channel to be reserved. The number of segments is not a fixed value, and the present embodiment does not set any limit to the number of segments. In the present embodiment, the number of segments is 6.
And S122, determining each segmentation point on the central line of each span beam according to the number of segments, and determining the position of an extension line of the connecting line between the center of the central line of each span beam and each segmentation point on the beam, which corresponds to the contour line of the beam, as the arrangement position of each strip foundation.
Specifically, the arc length of the center line L1 per span beam is calculated, and each segmentation point is determined based on the arc length and the number of segments. In the sub-step S21, the center line L1 and the contour line of each span beam are drawn on the drawing, and more specifically, may be drawn on the CAD drawing, and the center line L1 is divided equally according to the number of segments to determine the bisectors C on the center line L1, and each bisector C is a segment point.
Determining the center O of a center line according to the radian of the center line L1 on a drawing, connecting the center O with each bisector C, wherein each connecting line extends outwards to the outermost contour line L2 of each span beam, a straight line of each connecting line between the innermost contour line L3 and the outermost contour line L2 of each span beam is determined as the arrangement line L4 of the strip foundation, and the corresponding position of each arrangement line L4 is the arrangement position of each strip foundation.
And sequentially determining the arrangement positions of the strip foundations of each span beam according to the mode.
In the present embodiment, the number of segments is 6, and there are 5 strip-shaped basic layout lines, and one strip-shaped basic layout line is required to be arranged at each corresponding layout line.
It can be seen that, in this embodiment, the arrangement positions of the strip foundations are determined according to the segmentation points on the center line of each span beam, so that the distances of the strip foundations in each span beam are equal, calculation is convenient, the positions of the strip foundations can be arranged according to the curve bridge type of the curve box girder bridge, and the curve bridge type is better adapted.
In the assembling step S3, the beret pieces in each section of each bridge are assembled, and then the assembled beret pieces are assembled and fixed to form a beret frame of one bridge, and the steps are repeated to sequentially assemble the beret frames in the other bridges.
Specifically, each span beam is segmented, so on the ground, a plurality of beret sheets in each segment in each span beam are firstly assembled to form a whole. And assembling and fixing the assembled plurality of bailey pieces to form a bailey truss of a span beam, wherein the radian of the bailey truss is matched with that of the span beam. And repeating the assembling step, and assembling the bailey frames in the rest cross beams in sequence.
In specific implementation, the design length should be measured on a design drawing before the bailey truss is assembled. When assembled on the ground, if the number or specification of the bailey pieces cannot meet the design length, non-standard bailey pieces can be used. Wherein, the standard Bailey tablets are 3m in one section.
Referring to fig. 6 and 7, any two adjacent beret sheets 1 are connected in a folding direction through a connecting mechanism 2, so that the radian of each assembled beret sheet 1 is matched with the radian of a corresponding beam. Specifically, the structure of each bailey piece 1 is the same, each bailey piece 1 is linear, the connecting mechanism 2 connects the two bailey pieces 1 together, and the two bailey pieces 1 can have a certain radian after being connected, so that the radians of the plurality of bailey pieces 1 after being connected can be matched with the radians of the corresponding beams.
With continued reference to fig. 6 and 7, each attachment mechanism 2 may include: a fastener 21 and a barrel 22. Wherein one end of the cylinder 22 is open and the other end is closed. The cylinder 22 is hollow, and the cross section of the cylinder 22 is rectangular. The closed end of the cylinder 22 is connected with the female end 12 of one of the two adjacent bailey pieces 1. Preferably, the connection is a detachable connection.
More preferably, the two opposite side walls of the cylinder 22 are provided with extending plates 23 extending outwards from the closed end, so that the two extending plates 23 are opposite and juxtaposed, and a preset distance is provided between the two extending plates 23, and the preset distance can be determined according to practical situations, which is not limited in this embodiment. The two extending plates 23 correspond to and are parallel to the two truss sides 13 of the female end 12 of the corresponding Bailey piece one by one, and each extending plate 23 is connected with the corresponding truss side 13 through bolts.
In specific implementation, based on the length direction of the bailey piece (the direction from left to right shown in fig. 6), the two extending plates 23 are formed by extending two side walls of the cylinder 22 in the length direction corresponding to the bailey piece 1, and the distance between the two side walls of the cylinder 22 in the length direction corresponding to the bailey piece 1 is slightly smaller than the distance between the two truss sides 13 of the female head 12 of the corresponding bailey piece 1, so that the two extending plates 23 can be placed in the space between the two truss sides 13, and each extending plate 23 can be in contact with the corresponding truss side 13, thereby facilitating bolt connection.
The male end 11 of the other one of the two adjacent bailey pieces 1 is inserted into the inside of the cylinder 22 from the open end of the cylinder 22, and the male end 11 of the bailey piece 1 is rotatably connected with the cylinder 22 so that the two bailey pieces 1 can rotate relatively, thereby facilitating the adjustment of the angle between the two bailey pieces 1 to have a certain radian.
Preferably, the male end 11 of the bailey piece 1 is rotatably connected with the cylinder 22 in the following manner: the male end 11 of the bailey piece 1 is provided with a through hole 111 penetrating the thickness of the male end 11. The cylinder 22 has a mounting hole 221 on two opposite side walls corresponding to the width direction (the direction from top to bottom shown in fig. 6) of the male end 11 of the beret 1, that is, in fig. 6, the top wall of the cylinder 22 has a mounting hole 221 and the bottom wall also has a mounting hole 221, and the positions of the mounting holes 221 on the two side walls correspond to each other. The bolt is arranged through the two mounting holes 221 on the cylinder 22 and the through hole 111 of the male head 11 of the Bailey sheet 1, so that the male head 11 of the Bailey sheet 1 is rotatably connected with the cylinder 22.
The fastener 21 is arranged in the cylinder 22, and the fastener 21 is used for fastening the male head 11 of the bailey piece 1 after the male head 11 of the bailey piece 1 rotates to a preset angle. Specifically, this fastener 21 can be the wooden wedge, rotates two bailey pieces 1, when rotating to required radian, inserts the wooden wedge in the inside of barrel 22 and places in the space between the male head 11 of bailey piece 1 and the lateral wall of barrel 22 to lock the male head 11 of bailey piece 1, prevent the male head 11 of bailey piece 1 to remove, and then guaranteed the relative fixity between two bailey pieces 1.
It can be seen that, in this embodiment, make two bailey pieces can roll over to through coupling mechanism to the radian of adaptation every span of roof beam, and then make the bailey frame after the equipment can be close the radian of curved bridge, guaranteed installation quality and installation effect, and coupling mechanism's setting can be adapted to the radian of various differences and the construction of the curved bridge of different specifications, has enlarged application range. Meanwhile, the bailey frames can be reasonably arranged due to the arrangement of the connecting mechanism, mechanical labor cost is saved, and the construction period is shortened.
In summary, in this embodiment, the arrangement positions of the bar-shaped foundations in each span beam in the curved box girder bridge are firstly determined, so that the bar-shaped foundations can adapt to the curved bridge type of the curved box girder bridge, and the bailey frames are arranged according to the arrangement positions, the design and the specification requirements of the bar-shaped foundations and the curved bridge type, so that the radians of the bailey frames are matched with the bridge type of the curved box girder bridge, and meanwhile, the bailey frames are assembled on the ground, and then the assembled bailey frames are hoisted, so that the installation process is simple and convenient.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A method for installing a Bailey truss of a small-radius curve box girder bridge is characterized by comprising the following steps:
determining the arrangement positions of the strip foundations in each span beam; wherein, curved box girder bridge includes: at least two bridge beams;
arranging, namely checking and arranging the position of the bailey frames in each span beam according to the arrangement position and design and specification requirements of each strip foundation in each span beam;
assembling, namely assembling the Bailey sheets in each span beam on the ground according to the arrangement mode of the Bailey frames;
mounting, namely hoisting the assembled bailey frames of the cross beams to a preset mounting position and mounting;
the determining step further comprises:
determining a substep, namely determining a starting point, an end point and a contour line of each span beam;
and a segmentation substep, segmenting each span beam, and determining the position corresponding to the segmentation line of each segment in each span beam as the arrangement position of each strip foundation.
2. The method for installing a small radius curved box girder bridge bailey truss of claim 1 wherein said substep of determining further comprises:
determining the central line of each span beam according to design requirements;
respectively determining the positions of two adjacent pier bodies in each span beam after moving a preset distance to the center of the beam as a starting point and an end point;
and determining the contour line of each span beam according to the width, the central line, the starting point and the end point of each span beam.
3. The method for installing the bailey truss for the small radius curve box girder bridge according to claim 2, wherein the predetermined distance is 50 cm.
4. The method of installing a small radius curved box girder bridge bailey truss of claim 1 wherein the sub-step of segmenting further comprises:
determining the number of segments per span;
and determining each segmentation point on the central line of each span beam according to the number of the segments, and determining the position of an extension line of the central line of each span beam and the extension line of the connecting line between the segmentation points on the beam, which corresponds to the contour line of the beam, as the arrangement position of each strip foundation.
5. The method for installing the Bailey truss of small radius curved box girder bridge according to claim 1, wherein in the arranging step,
and when the Bailey frames are checked, determining the length of the Bailey frames according to the arc length of the outermost side in the contour line of each span beam.
6. The method for installing the Bailey truss of small radius curved box girder bridge according to claim 1, wherein in the assembling step,
assembling a plurality of Bailey pieces in each section of each span beam, assembling and fixing the Bailey pieces assembled in each section to form a Bailey frame of the span beam, repeating the step, and sequentially assembling the Bailey frames in the rest span beams.
7. The method for installing the Bailey frames of the small-radius curved box girder bridge according to claim 6, wherein any two adjacent Bailey pieces are connected in a folding direction through a connecting mechanism, so that the radian of each assembled Bailey piece is matched with the radian of the corresponding beam.
8. The method for installing a small radius curved box girder bridge bailey truss of claim 7 wherein each of the connection mechanisms includes: the device comprises a fastener and a cylinder body with one open end and the other closed end; wherein,
the closed end of the cylinder is connected with the female end of one of the two adjacent bailey pieces;
the male head of the other one of the two adjacent bailey pieces is inserted into the barrel from the opening end of the barrel, and the male head of the bailey piece is rotatably connected with the barrel; the fastener is used for fastening the male head of the bailey piece after the male head of the bailey piece rotates to a preset angle.
9. The method for installing the Bailey frames of the small-radius curve box girder bridges as claimed in claim 8, wherein the two opposite side walls of the cylinder are provided with extension plates extending outwards from the closed end, and the two extension plates correspond to the two truss side edges of the female ends of the corresponding Bailey pieces one by one and are connected through bolts.
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| CN201911005585.5A CN110820568B (en) | 2019-10-22 | 2019-10-22 | Method for mounting bailey truss of small-radius curve box girder bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013104833A1 (en) * | 2012-01-13 | 2013-07-18 | Kulmala Risto | A method and an apparatus for building a bridge cast on site |
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