CN112081016A - Lifting and folding device for bridge arch rib - Google Patents

Lifting and folding device for bridge arch rib Download PDF

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Publication number
CN112081016A
CN112081016A CN202011002135.3A CN202011002135A CN112081016A CN 112081016 A CN112081016 A CN 112081016A CN 202011002135 A CN202011002135 A CN 202011002135A CN 112081016 A CN112081016 A CN 112081016A
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CN
China
Prior art keywords
lifting
arch
rib
arch rib
bridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011002135.3A
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Chinese (zh)
Inventor
陈洪敏
王敬宇
赵龙
杜伟
张广东
刘岭忠
王国齐
刘绍焕
蒲有国
谢佳佳
任炎权
王文炜
许崇法
宋伟豪
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Southeast University
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Southeast University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Southeast University filed Critical Southeast University
Priority to CN202011002135.3A priority Critical patent/CN112081016A/en
Publication of CN112081016A publication Critical patent/CN112081016A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • E01D21/06Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D4/00Arch-type bridges

Abstract

The invention discloses a lifting and folding device of a bridge arch rib, which is characterized in that an arch foot side arch rib is assembled on an arch foot side arch rib assembling support; assembling an arch rib lifting section on the arch rib lifting section assembling support; the problem that the mutual interference between the arch rib section of the main bridge part and the approach bridge construction cannot be carried out simultaneously in the prior art is solved; the arch springing side arch rib and the arch rib lifting section can be installed at the same time, so that the construction period of the arch rib can be shortened, and the construction progress is accelerated; the supporting height of the arch rib lifting section is lower than the design elevation of the arch rib lifting section; hoisting and lifting the arch rib lifting section to a designed elevation through a lifting system; compared with the traditional cable hoisting construction method, the method has the advantages that the task load of high-altitude operation is reduced, the stability of the hoisting system is high, the positioning accuracy is high, the deformation of the arch rib in the horizontal direction and the vertical direction in the hoisting process is reduced, the deviation correction amount of the installation position of the arch rib is reduced, and the construction safety and the installation accuracy are improved.

Description

Lifting and folding device for bridge arch rib
Technical Field
The invention relates to the field of bridge construction, in particular to a lifting and folding device for bridge arch ribs.
Background
The arch rib is a framework of a main arch ring of an arch bridge, and the existing arch rib installation method is roughly divided into the following steps: a full framing construction method, a swivel construction method and a cable hoisting construction method. The full-hall bracket construction method is suitable for arch bridges with small span and no navigation requirement, the swivel construction method and the cable hoisting construction method have more aloft work and large construction risk, arch ribs can be constructed after the main beam is finished, and the construction time of key lines is long.
In patent document No. CN101672011A, a method for vertically lifting a steel tube arch rib is disclosed, in which an arch rib is divided into two side sections and a middle section closure section, the two side sections of the steel tube arch rib are vertically lifted by using arch hinges of side section arch feet as rotation points, and after reaching a set position, the two side sections are respectively stabilized on two lifting towers by using temporary supports, and the middle section closure section of the steel tube arch rib is lifted. The middle folding section of the invention is shorter, only comprises a part of wind bracing structures or does not comprise the wind bracing structures, is unfavorable for the integrity of the arch rib and the wind bracing structures, and has poorer stability when the middle folding section is hoisted.
In the patent document with publication number CN102071644A, a method for integrally lifting and installing a bridge arch rib is disclosed, in which a lifting support is arranged at a main pier or arch springing, and the arch rib is lifted after corresponding to two ends of the arch rib, without being arranged in the middle of the bridge. According to the method, the lifting support is located at the main pier and provided with the front and rear cable winds, so that the structural stress at the side arch is complex and unfavorable in the lifting process.
The patent document with the publication number of CN102561191A discloses an integral lifting system and a construction method of an arch rib of an arch bridge, the patent comprises a triangular rigid frame, a lifting station, arch rib supports, an integral arch rib and a barge for conveying the integral arch rib, wherein the triangular rigid frame is fixed on a pier and symmetrically arranged on two sides of a main span of the arch bridge, the lifting station is respectively arranged on the two triangular rigid frames, the arch rib supports are erected on the barge to support the integral arch rib, and the integral arch rib is folded and fixed with an arch rib folding section after being lifted to form the integral arch bridge. The arch rib support is erected on a barge, the transportation risk is high, and the method adopts an arch-first beam-later construction method and is not suitable for a rigid tied arch bridge.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a lifting and folding device for bridge arch ribs, which simplifies the process of arch rib installation and construction, shortens the construction period of the arch ribs, improves the construction safety, and ensures the stability and the precision of the arch ribs in the lifting process, thereby realizing accurate folding and ensuring the line shape.
The technical scheme is as follows: the invention provides a lifting and folding device for bridge arch ribs, wherein a bridge comprises a bridge deck system and arch ribs; the arch rib comprises an arch rib lifting section, two arch foot side arch ribs and two arch rib folding sections; the arch rib lifting section is positioned at the middle section of the bridge deck system; the two arch leg side arch ribs are respectively positioned at two ends of the bridge deck system; each arch rib at the arch foot side is connected with one end of the arch rib lifting section through an arch rib folding section;
the arch rib lifting section comprises two rib bodies; the two rib bodies are symmetrically arranged along the transverse bridge direction and are respectively inclined inwards;
a pair of horizontal counter-pulling lifting lugs is symmetrically arranged on the arch rib lifting section along the longitudinal bridge direction; a tie bar is arranged between the pair of horizontal oppositely-pulling lifting lugs; reducing the deformation of the lifting section of the arch rib by tensioning and unloading the tie bars;
the lifting and folding device comprises
Two arch foot side arch rib assembling brackets; the two arch foot side arch rib assembling supports are respectively installed at two ends of the bridge deck system, and each arch foot side arch rib assembling support is used for supporting one arch foot side arch rib at a designed elevation and assembling;
an arch rib lifting section assembling support; the arch rib lifting section assembling support is arranged at the middle section of the bridge deck system and is used for supporting and assembling the arch rib lifting section; the supporting height of the arch rib lifting section is lower than the design elevation of the arch rib lifting section; the arch rib lifting section assembling support comprises a support main body and an anti-deviation structure fixed at the top of the support main body; the deviation preventing structure is connected with the end surface of the inner side of the rib body;
a lifting system; the lifting system is fixed on the ground and used for lifting the arch rib lifting section to a designed elevation;
hoisting equipment; the hoisting equipment is used for hoisting the arch springing side arch rib and placing the arch springing side arch rib on the arch springing side arch rib assembling support; hoisting the arch rib lifting section and placing the arch rib lifting section on the arch rib lifting section assembling support; and the lifting device is used for lifting the arch rib lifting section to a designed elevation, then lifting the arch rib folding section in place, connecting the arch rib lifting section with the arch springing side arch rib, and completing the assembly of the arch rib;
an arch rib support structure; the arch rib supporting structure is used for reinforcing the assembled arch rib support on a bridge deck system.
Furthermore, two ends of the tie bar are respectively connected with a horizontal counter-pulling lifting lug through anchor connectors.
Further, the lifting systems are two and are symmetrically arranged along the center of the lifting section of the arch rib.
Furthermore, a carrying pole beam is arranged on the arch rib lifting section; the carrying pole beams and the lifting systems are arranged in a one-to-one correspondence manner; the carrying pole beam is provided with a lifting lug for connecting a lifting system.
Further, the lifting system comprises a pier cap, a lifting bracket and a power device; the pier cap is arranged on the ground; the lifting support is fixed on the pier bearing platform; the power device is arranged on the top of the lifting bracket.
Further, the deviation preventing structure comprises supporting legs and supporting rods; the supporting legs are fixed at the top of the bracket main body; the end surface of the supporting leg close to the rib body is parallel to the end surface of the inner side of the corresponding rib body; the end surfaces of the supporting legs, which are close to the rib bodies, are vertical to the supporting rods; one end of the supporting rod is fixed on the end face, close to the rib body, of the supporting leg; the other end of the supporting rod is connected with the end surface of the inner side of the rib body.
Has the advantages that: assembling arch springing side arch ribs on the arch springing side arch rib assembling support; assembling an arch rib lifting section on the arch rib lifting section assembling support; the problem that the mutual interference between the arch rib section of the main bridge part and the approach bridge construction cannot be carried out simultaneously in the prior art is solved; the arch springing side arch rib and the arch rib lifting section can be installed at the same time, so that the construction period of the arch rib can be shortened, and the construction progress is accelerated;
the supporting height of the arch rib lifting section is lower than the design elevation of the arch rib lifting section; hoisting and lifting the arch rib lifting section to a designed elevation through a lifting system; compared with the traditional cable hoisting construction method, the method has the advantages that the task load of overhead operation is reduced, the stability of the hoisting system is high, the positioning accuracy is high, the deformation of the arch rib in the horizontal direction and the vertical direction in the hoisting process is reduced, the deviation correction quantity of the installation position of the arch rib is reduced, the construction safety and the installation accuracy are improved, and the purpose of accurately folding and ensuring the linear shape is realized;
the arch rib supporting structure increases the stability of structural installation and realizes reasonable force transmission of the arch rib structure; the method is suitable for rigid tie bar bridges; the device has the advantages that the device can help the arch rib to share stress and play a role in supporting in the construction processes of graded unloading of tie rods, stretching of arch rib slings and the like, the vertical deformation of the arch rib in the construction process can be reduced, and the reasonable line shape of the arch rib in the process of forming a bridge is ensured;
the stress of the arch rib can be more reasonable in the lifting process by tensioning the temporary tie bar, the vertical deformation of the arch crown and the horizontal deformation of two ends of the arch rib are reduced, and the elevation and the line shape of the arch rib can be conveniently controlled and adjusted; the two sides of the arch rib can be ensured to be stressed symmetrically in the unloading process through grading unloading, and residual deformation caused by uneven stress of the arch rib is avoided. The whole main bridge and the steel supports can form a truss system through grading unloading to form an integral structure, and horizontal force generated by the structure in the construction process can be balanced through the self structure;
the anti-deviation structure can be used for positioning the arch rib lifting section and preventing the arch rib lifting section from being inclined in a left-right deviation manner.
Drawings
FIG. 1 is a schematic view of the assembly stage of the rib and rib riser of the present invention;
FIG. 2 is a schematic view of the vertical lifting and closing stages of the rib lift of the present invention;
FIG. 3 is a schematic view of the arch rib support structure of the present invention;
fig. 4 is a schematic view of the construction of the inventive carrying pole beam;
FIG. 5 is a schematic structural view of the tie bar of the present invention;
fig. 6 is a cross-sectional view of the rib lift of the present invention mounted on a rib lift sub assembly frame.
Detailed Description
As shown in figure 1, the invention provides a lifting and folding device for bridge arch ribs, wherein a bridge comprises a bridge deck system 1 and the arch ribs.
The bridge deck system 1 is a segmental splicing structure, does not comprise a bridge deck pavement structure, and consists of steel box longitudinal beams, middle cross beams, end cross beam T-shaped small longitudinal beams and bridge decks.
The arch rib comprises an arch rib lifting section 201, two arch foot side arch ribs 202 and two arch rib folding sections 203; the arch rib lifting section 201 is positioned at the middle section of the bridge deck system 1; the two arch foot side arch ribs 202 are respectively positioned at two ends of the bridge deck system 1; each of the arch rib side 202 is connected to one end of the rib lifting section 201 by a rib closure section 203. The arch rib lifting section 201 and the two arch rib side 202 are all segment assembling structures, wherein the arch rib lifting section 201 comprises a wind bracing structure; the actual length of the rib closure 203 is 10% longer than the design length.
As shown in fig. 4 and 5, a pair of horizontal counter-pulling lifting lugs 201a is symmetrically arranged on the arch rib lifting section 201 along the longitudinal bridge direction; a tie bar 201b is arranged between the pair of horizontal counter-pulling lifting lugs 201 a; two ends of the tie bar 201b are respectively connected with a horizontal counter-pulling lifting lug 201a through an anchor connector 201e, and the deformation of the arch rib lifting section 201 is reduced by tensioning and unloading the tie bar 201 b; tensioning may be performed by way of a tensioning jack through anchor connector 201 e. A carrying pole beam 201c is arranged on the arch rib lifting section 201; the carrying pole beams 201c are arranged in one-to-one correspondence with the lifting systems; the carrying pole beam 201c is provided with a lifting lug 201 d.
The lift seaming apparatus comprises:
the two arch springing side arch rib splicing supports 3; the two arch springside arch rib assembling supports 3 are respectively installed at two ends of the bridge deck system 1, and each arch springside arch rib assembling support 3 is used for supporting one arch springside arch rib 202 at a designed elevation and assembling. 3 pipe columns of the arch foot side arch rib assembling support are connected by welding through I14I-shaped steel connecting systems, an upper beam at the top of the steel pipe pile adopts H-shaped steel with the specification of HM440 multiplied by 300mm, and 273 multiplied by 7mm adjusting short pipes are placed on the H-shaped steel to carry out shoveling and cushioning on the arch ribs.
An arch rib lifting section assembling support 4; the arch rib lifting section assembling support 4 is arranged at the middle section of the bridge deck system 1 and is used for supporting and assembling the arch rib lifting section 201; the support height of the rib lifting section 201 is lower than the design elevation of the rib lifting section 201. The top of the arch rib lifting section assembling support 4 firstly adopts HM 440X 300 section steel as a longitudinal supporting pad beam, then a worker 14 distribution beam is arranged on the top of the arch rib lifting section assembling support in the transverse bridge direction to be used as a wind bracing jig frame foundation, and a jig frame template is arranged on the worker 14 transverse distribution beam, so that the wind bracing longitudinal and vertical curve manufacturing is realized.
Two lifting systems symmetrically arranged along the center of the arch rib lifting section 201; the lifting system comprises a pier cap 501, a lifting bracket 502 and a power device 503; the pier cap 501 is arranged on the ground, and the central position of each pier cap 501 corresponds to the position of one lifting lug 201 d; the lifting support 502 is bolted and fixed on the pier bearing platform 501 through an embedded anchor bolt, and a box-shaped cross beam is longitudinally adopted at the top of the lifting support 502 as a placing platform of the power device 503; the steel pipe piles of the lifting bracket 502 are welded and connected by adopting a steel pipe connecting system, and the height of the top surface of the lifting bracket 502 from the bottom surface is more than 1.4 times of the rise, so that the requirement of lifting clearance is ensured; the power device 503 is connected with the lifting lug 201d, and lifts the arch rib lifting section 201 to the designed elevation.
The power device 503 adopts a computer-controlled hydraulic synchronous lifting technology, consists of a steel strand, a lifting oil cylinder cluster, a hydraulic pump station, a sensing detection and computer-controlled and remote monitoring system, and has the characteristics that the lifting weight, span and area are not limited, the lifting system has a millimeter-level fine adjustment function, can realize aerial vertical accurate positioning, and has small equipment volume, light dead weight, large bearing capacity and the like.
A hoisting device 6; the hoisting equipment 6 is used for hoisting the arch springing side arch rib 202 and placing the same on the arch springing side arch rib assembling support 3; hoisting the arch rib lifting section 201 and placing the arch rib lifting section onto the arch rib lifting section assembling support 4; and the lifting device is used for lifting the arch rib lifting section 201 to the designed elevation, lifting the arch rib folding section 203 in place, connecting the arch rib lifting section 201 with the arch springing side arch rib 202, and completing the assembly of the arch rib.
Specifically, the hoisting device 6 adopts the following three devices: 50t gantry crane, 240t truck and 50t truck. The 50t gantry crane construction is used for sectional hoisting of all the assembly areas; the 240t truck crane is used for the arch rib segment which exceeds the height of the gantry crane by more than 30 m; the 50t truck crane is mainly used for temporary support installation and auxiliary construction operation.
A rib support structure 7; the arch rib supporting structure 7 is used for reinforcing the assembled arch rib support on the bridge deck system 1. The arch rib supporting structures 7 comprise a plurality of groups, the longitudinal bridges are symmetrically arranged on two sides of the bridge in the axial direction and are triangular or A-shaped, the upper parts of the longitudinal bridges and the upper parts of the arch ribs are welded and connected by steel pipe intersecting lines, and 20mm stiffening plates are additionally arranged in the arch rib boxes; the lower part of the bridge deck system is connected with the bridge deck system 1 by utilizing a guy cable lifting lug of the bridge deck system 1 in a hinged connection mode. The arch rib supporting structure 7 can help the arch rib to share stress and play a role of supporting in the construction processes of unloading the temporary tie bars of the arch rib, tensioning the slings of the arch rib and the like in a grading way, can reduce the vertical deformation of the arch rib in the construction process, and ensures that the arch rib is reasonable in line shape when a bridge is formed.
As shown in fig. 4, the rib lifting section 201 includes two rib bodies 2011; the two rib bodies 2011 are symmetrically arranged along the transverse bridge direction and are respectively inclined towards the inner side.
As shown in fig. 6, the arch rib lifting section assembling support 4 comprises a support main body 401 and an anti-deviation structure fixed on the top of the support main body 401; the deviation preventing structure is connected with the end surface of the inner side of the rib 2011.
The anti-deviation structure comprises a leg 402a and a strut 402 b; the leg 402a is fixed on the top of the bracket body 401; the end surface of the leg 402a close to the rib 2011 is parallel to the inner end surface of the corresponding rib 2011; the end surface of the leg 402a close to the rib 2011 is perpendicular to the strut 402 b; one end of the strut 402b is fixed on the end face of the leg 402a close to the rib 2011; the other end of the strut 402b is connected to the inner end surface of the rib 2011. The anti-deviation structure can be respectively arranged on the inner sides of the two rib bodies 2011, and the two rib bodies 2011 are respectively positioned to prevent the left and right deviation and inclination of the arch rib lifting section 201.
The structure of the arch rib 202 on the arch foot side is similar to that of the arch rib lifting section 201, and a similar anti-deviation structure can be arranged on the arch rib splicing support 3 on the arch rib side.
The construction method of the lifting and folding device comprises the following steps:
s1, hoisting each segment of the bridge deck system 1, assembling from two ends of the bridge to the middle until the segments are folded, and completing paving of the bridge deck system 1; when the bridge deck system 1 conflicts with the position of the lifting system, the beam section at the position of the lifting system can be reserved and is not installed; then, installing an arch springside arch rib assembling support 3 and an arch rib lifting section assembling support 4 on the bridge deck system 1 through a hoisting device 6; and installing a lifting system on the ground;
s2, as shown in fig. 1, hoisting two arch springing side arch ribs 202 by hoisting equipment 6, each segment of each arch springing side arch rib (202) being placed on one arch springing side arch rib assembling support 3 and assembled; hoisting each segment of the arch rib lifting section 201, and assembling on the arch rib lifting section assembling support 4;
s3, after the arch rib lifting section 201 is assembled into a whole, connecting the horizontal oppositely-pulling lifting lug 201a and the tie bar 201b, and performing first-stage tensioning to pre-fasten the tie bar 201 b;
s4, hoisting and lifting the arch rib lifting section 201 through a lifting system; when the arch rib lifting section 201 just leaves the arch rib lifting section assembling support 4, second-stage tensioning is carried out, the tie bars 201b are symmetrically tensioned to control stress, and the influence of deformation and stress of the arch rib lifting section 201 caused by lifting force is reduced; hoisting and lifting the arch rib lifting section 201 to the designed elevation; the position of the end part of the arch rib lifting section 201 and the position of the end part of the arch rib 202 on the arch springing side are adjusted and fixed firmly; specifically, the relative positions of the end part of the arch rib lifting section 201 and the end part of the assembled arch springside arch rib 202 can be adjusted through a chain block, and then the arch rib lifting section and the assembled arch springside arch rib are fixed firmly temporarily;
when the longitudinal connecting system position of the shoulder pole beam 201c and the lifting support 502 has conflict, temporarily removing the connecting system, then continuously lifting, and after exceeding the connecting system position, restoring the connection of the connecting system rod pieces to ensure the integral stability of the lifting support 502;
s5, as shown in fig. 2, hoisting the arch rib closure segment 203 by using the hoisting device 6, connecting each arch rib 202 on the arch foot side to one end of the arch rib lifting segment 201 through one arch rib closure segment 203, and after the closure is completed, removing the arch rib lifting segment assembling support 4; specifically, the actual length of the arch rib closure segment 203 is 10% longer than the design, the actual length is matched, cut and welded to be closed on site, different lengths of the closure segments are observed within 2 days, and the length of the final arch rib closure segment 4 is determined;
when the day and the night alternate, the arch rib is extremely sensitive to temperature in the processes of temperature rise and temperature reduction, the phenomenon of thermal expansion and cold contraction is large, and the temporary closure locking stress changes quickly; therefore, when the closure is carried out, the error of the closure section and the structural axis deviation are actually measured under the conditions that the outside air temperature is stable and the sunlight is not left or right, and then the flame cutting method is utilized to carry out on-site accurate measurement cutting, wherein the measurement time is 2: performing on-site welding construction at the 00 air temperature stable period; for 4 closure sections, namely the left, the right, the south and the north after the arch rib and the wind brace are lifted, firstly constructing 2 closure sections on the side of the north bank, continuously observing for 2 days, then completing welding of the 2 closure sections on the south side, and performing synchronous welding and fixing during closure;
s6, as shown in figure 3, arranging an arch rib supporting structure 7 to support and reinforce the assembled arch rib on the bridge deck system 1;
s7, synchronously stretching the tie bar 201b for grading unloading; unloading is divided into five stages, the unloading force of each stage is 20% tensile force, the two ends of the tie rod 201b are symmetrically and synchronously unloaded, and after the two ends of the tie rod 201b are unloaded to the same level of load, the next level of load is continuously unloaded until all the unloading is finished; the arch rib can be stressed more reasonably in the lifting process by tensioning the tie bar 201b, the vertical deformation of the arch top and the horizontal deformation of two ends of the arch rib are reduced, and the elevation and the line shape of the arch rib can be conveniently controlled and adjusted; the two sides of the arch rib can be ensured to be stressed symmetrically in the unloading process through grading unloading, and residual deformation caused by uneven stress of the arch rib is avoided. The whole main bridge and the steel supports can form a truss system through grading unloading to form an integral structure, and horizontal force generated by the structure in the construction process can be balanced through the self structure;
s8, dismantling the lifting system, the arch springing side arch rib assembling support 3 and the tie bar 201 b;
and S9, connecting the bridge deck system 1 with the arch rib, and dismantling the arch beam support structure.

Claims (6)

1. The utility model provides a device is folded in promotion of bridge arch rib which characterized in that: the bridge comprises a bridge deck system (1) and arch ribs; the arch rib comprises an arch rib lifting section (201), two arch foot side arch ribs (202) and two arch rib folding sections (203); the arch rib lifting section (201) is positioned at the middle section of the bridge deck system (1); the two arch foot side arch ribs (202) are respectively positioned at two ends of the bridge deck system (1); each arch foot side arch rib (202) is connected to one end of the arch rib lifting section (201) through an arch rib folding section (203);
the arch rib lifting section (201) comprises two rib bodies (2011); the two rib bodies (2011) are symmetrically arranged along the transverse bridge direction and are respectively inclined inwards;
a pair of horizontal counter-pulling lifting lugs (201 a) are symmetrically arranged on the arch rib lifting section (201) along the longitudinal bridge direction; a tie bar (201 b) is arranged between the pair of horizontal counter-pulling lifting lugs (201 a); reducing the deformation of the arch rib lifting section (201) by tensioning and unloading the tie bars (201 b);
the lifting and folding device comprises
Two arch foot side arch rib splicing supports (3); the two arch foot side arch rib assembling supports (3) are respectively installed at two ends of the bridge deck system (1), and each arch foot side arch rib assembling support (3) is used for supporting one arch foot side arch rib (202) at a designed elevation and assembling;
an arch rib lifting section assembling support (4); the arch rib lifting section assembling support (4) is arranged at the middle section of the bridge deck system (1) and is used for supporting and assembling the arch rib lifting section (201); the supporting height of the arch rib lifting section (201) is lower than the design elevation of the arch rib lifting section (201); the arch rib lifting section assembling support (4) comprises a support main body (401) and an anti-deviation structure fixed at the top of the support main body (401); the deviation preventing structure is connected with the end face of the inner side of the rib body (2011);
a lifting system; the lifting system is fixed on the ground and used for lifting the arch rib lifting section (201) to a designed elevation;
a hoisting device (6); the hoisting equipment (6) is used for hoisting the arch springside arch rib (202) and placing the arch springside arch rib on the arch springside arch rib assembling support (3); hoisting the arch rib lifting section (201) and placing the arch rib lifting section on the arch rib lifting section assembling support (4); the arch rib assembling system is used for hoisting the arch rib folding section (203) in place after the arch rib lifting section (201) is lifted to a designed elevation, connecting the arch rib lifting section (201) with the arch rib (202) at the arch foot side and completing assembling of the arch rib;
a rib support structure (7); the arch rib supporting structure (7) is used for supporting and reinforcing the assembled arch ribs on the bridge deck system (1).
2. A lifting and folding device for a bridge rib according to claim 1, wherein: two ends of the tie bar (201 b) are respectively connected with a horizontal counter-pulling lifting lug (201 a) through anchor connectors (201 e).
3. A lifting and folding device for a bridge rib according to claim 2, wherein: the two lifting systems are symmetrically arranged along the center of the arch rib lifting section (201).
4. A lifting and folding device for a bridge rib according to claim 3, wherein: a carrying pole beam (201 c) is arranged on the arch rib lifting section (201); the carrying pole beams (201 c) are arranged in one-to-one correspondence with the lifting systems; the carrying pole beam (201 c) is provided with a lifting lug (201 d) for connecting a lifting system.
5. A lifting and folding device for a bridge rib according to claim 4, wherein: the lifting system comprises a pier cap (501), a lifting bracket (502) and a power device (503); the pier cap (501) is arranged on the ground; the lifting bracket (502) is fixed on the pier cap (501); the power device (503) is arranged on the top of the lifting bracket (502).
6. A lifting and folding device for a bridge rib according to claim 1, wherein: the anti-deviation structure comprises a leg (402 a) and a strut (402 b); the supporting leg (402 a) is fixed on the top of the bracket main body (401); the end surface of the leg (402 a) close to the rib body (2011) is parallel to the inner side end surface of the corresponding rib body (2011); the end face of the leg (402 a) close to the rib body (2011) is perpendicular to the strut (402 b); one end of the strut (402 b) is fixed on the end face of the leg (402 a) close to the rib body (2011); the other end of the strut (402 b) is connected with the inner side end face of the rib body (2011).
CN202011002135.3A 2020-09-22 2020-09-22 Lifting and folding device for bridge arch rib Pending CN112081016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011002135.3A CN112081016A (en) 2020-09-22 2020-09-22 Lifting and folding device for bridge arch rib

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011002135.3A CN112081016A (en) 2020-09-22 2020-09-22 Lifting and folding device for bridge arch rib

Publications (1)

Publication Number Publication Date
CN112081016A true CN112081016A (en) 2020-12-15

Family

ID=73739499

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011002135.3A Pending CN112081016A (en) 2020-09-22 2020-09-22 Lifting and folding device for bridge arch rib

Country Status (1)

Country Link
CN (1) CN112081016A (en)

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