CN111424548B - Main cable strand forming device of suspension bridge and construction method thereof - Google Patents
Main cable strand forming device of suspension bridge and construction method thereof Download PDFInfo
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- CN111424548B CN111424548B CN202010266627.7A CN202010266627A CN111424548B CN 111424548 B CN111424548 B CN 111424548B CN 202010266627 A CN202010266627 A CN 202010266627A CN 111424548 B CN111424548 B CN 111424548B
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- 239000000725 suspension Substances 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title abstract description 20
- 238000009987 spinning Methods 0.000 claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000004873 anchoring Methods 0.000 claims description 18
- 238000009434 installation Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000009954 braiding Methods 0.000 abstract description 10
- 238000004804 winding Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention provides a main cable strand forming device of a suspension bridge and a construction method thereof, wherein the cable strand forming device is fixedly connected with a bottom beam of a catwalk door frame through bolts by utilizing an upright post, the bottom beam of the door frame is fixedly connected with a catwalk bearing rope, and a steel wire load born by the cable strand forming device is transmitted to a catwalk through the bottom beam of the catwalk door frame; the grille is inserted into the cross beam of the support frame according to the strand spacing and is fixed with the cross beam by bolts. The grid is mainly used for ensuring that steel wires (dead wires and live wires) fall into the preset positions corresponding to the braided strands in the process of braiding the steel wires, and preventing the confusion of the steel wires of the strands adjacent to the left and the right. The riding wheels are arranged at the top ends of grids at two sides of the supporting beam and are mainly used for supporting the movable yarns in the process of going spinning; during the return spinning, the live silk on the riding wheel is led into the grille, so that the spinning is ensured to go back and forth continuously. The adjusting pull rods are arranged on two sides of the cable strand forming frame and used for adjusting the height of the cable strand forming device, so that the plain strand type in the cable braiding process is ensured to meet the design requirement.
Description
Technical Field
The invention relates to the field of construction of main cables of suspension bridges, in particular to a device for forming main cable strands of a suspension bridge and a construction method thereof.
Background
The main cable frame of the suspension bridge is provided with two construction processes, one is a prefabricated parallel cable method (PPWS), namely, steel wires are prefabricated into parallel cable strands in advance in a factory, and then the parallel cable strands are pulled and erected on a catwalk by a traction system; the other is an air spinning method (AS method), i.e. a main rope strand is formed by reciprocating the traction steel wire at the bridge position by a spinning wheel. The construction of the air spinning method (AS method) has a long history, and is still widely used abroad AS one of the main methods of the construction of main cables at present, and the main cables of the domestic suspension bridge are designed and constructed by adopting a prefabricated parallel strand method (PPWS method).
With the sustainable development of economic construction in China, foundation engineering construction such AS bridge construction and the like obtains unprecedented development opportunities, particularly the requirements for constructing an ultra-large span suspension bridge across rivers, seas and canyons are increasingly outstanding, the main cable strands of the ultra-large span (more than 2000 m) suspension bridge are heavy, the required traction equipment is high, particularly the large-span suspension bridge is constructed in a mountain area with undeveloped traffic, the difficult transportation problem caused by overlarge weight of a single cable strand of the PPWS method can be avoided by the AS method, and the overhead spinning method (AS method) has unique advantages in the aspects of economy, transportation conditions and the like for the ultra-large span suspension bridge and the main cable erection of the suspension bridge with difficult transportation in bridge sites.
When the aerial spinning method is adopted for construction, a single main cable consists of dozens of strands, each strand consists of hundreds of steel wires, a spinning wheel pulls the steel wires to reciprocate above a catwalk, and in order to ensure that the corresponding strands woven by the steel wires are smoothly formed and the line type accords with the empty cable state, the steel wires are prevented from being scattered, mixed and falling on the catwalk in the cable braiding process, and a steel wire supporting frame is required to be arranged on the catwalk at certain intervals, so that the problems are solved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a main cable strand forming device of a suspension bridge and a construction method thereof, which are suitable for the construction of a main cable of the suspension bridge by an Air Spinning (AS) method.
The technical scheme adopted by the invention is as follows:
a device for forming main cable strands of a suspension bridge comprises
The bottom of the catwalk door frame bottom beam is connected with a catwalk bearing rope;
the two upright posts are respectively connected to the top of the bottom cross beam of the catwalk door frame at vertical intervals through the supporting frames;
the support cross beam is horizontally arranged between the two upright posts and can move up and down along the upright posts;
The grids are arranged and uniformly fixed on the supporting cross beam at intervals;
The riding wheels at least comprise two riding wheels, are respectively connected to grids at the two ends of the supporting beam through riding wheel supporting members and are positioned at the outer sides of the top ends of the grids;
The adjusting pull rods at least comprise two adjusting pull rods which are arranged on the outer sides of the two upright posts in parallel; the upper end of the adjusting pull rod is fixed on the upright post, and the lower end of the adjusting pull rod is fixed at the end part of the supporting cross beam; the height of the supporting cross beam is adjusted by adjusting the relative fixed position of the adjusting pull rod.
Specifically, the support frame at least comprises a single tripod formed by a support frame diagonal brace, a support frame bottom longitudinal beam and a support frame bottom cross beam, the number of the tripod is at least two, each upright post is connected with the cat track bottom cross beam through a plurality of tripod, and the plurality of tripod are connected in parallel through the tripod bottom to form a whole.
Further, two ends of the supporting beam are respectively and vertically fixed on the two upright posts through connecting sleeves.
Further, the riding wheel supporting member at least comprises a riding wheel supporting beam and a connecting member, wherein the riding wheel supporting beam is vertically fixed on the outer side of the top of the outermost grille, and the connecting member is fixed on the grille and is positioned below the riding wheel supporting beam; the riding wheel is fixed at the upper end of the riding wheel supporting beam, and a stiffening plate is arranged between the lower end of the riding wheel supporting beam and the connecting component.
Further, the adjusting pull rod is of a full-wire structure, the upper end of the adjusting pull rod is connected to the upright post through an upper anchoring beam and a nut in a threaded manner, and the lower end of the adjusting pull rod is connected to the end part of the supporting transverse beam through a lower anchoring beam and a nut in a threaded manner; the height of the supporting cross beam is adjusted by alternately loosening and fastening nuts at the upper end and the lower end of the adjusting pull rod.
Further, the number of the grids corresponds to the number of the main cable strands, and the net spacing between adjacent grids is the same as the strand diameter; the grids are inserted into the supporting cross beam according to the strand spacing and fixedly connected with the supporting cross beam through bolts.
Further, two supporting limiting members for penetrating the catwalk sag adjusting ropes are symmetrically arranged on two sides of the lower end of the supporting cross beam.
Preferably, the upright posts are fixedly connected with the bottom cross beam of the support frame through bolts.
The cable strand forming devices are provided with a plurality of groups, the cable strand forming devices are arranged on the catwalk at intervals which are the same as the catwalk door frame, and the heights of the cable strand forming devices are consistent with the cable strand type.
A construction method of a main cable strand forming device of a suspension bridge comprises the following steps:
S1, firstly, assembling a supporting beam, connecting sleeves at two ends of the supporting beam and a lower anchoring beam into a whole, and then symmetrically fixing two supporting and limiting members at the lower end of the supporting beam;
S2, fixing the supporting cross beam between the two upright posts through connecting sleeves, and respectively connecting the outer sides of the two upright posts with the anchoring beams; then, according to the design, the height of the supporting cross beam is preliminarily adjusted, the upper end of the adjusting pull rod is fixed on the upright post through the upper anchoring beam, and the lower end of the adjusting pull rod is fixed on the supporting cross beam through the lower anchoring beam;
s3, welding the tops of two grids positioned at the two end parts of the supporting beam respectively with the connecting piece, the riding wheel supporting beam and the stiffening plate into a whole, inserting the bottoms of the grids into the supporting beam, and fastening the grids by nuts; the riding wheel is fixed on the riding wheel supporting beam; then sequentially installing the residual grids according to the strand spacing;
S4, assembling a support bracket diagonal brace, a support bracket bottom longitudinal beam and a support bracket bottom cross beam into a triangular bracket, and assembling a support bracket upright post and a catwalk door bracket bottom cross beam into a whole through a plurality of triangular brackets;
s5, the assembled cable strand forming devices and the catwalk door frames are lowered to the design installation position group by group through door frame bearing ropes by means of a winch, the heights of the supporting cross beams are accurately adjusted according to the design elevation before the main cable is braided, and the catwalk sag adjusting ropes penetrate through supporting limiting members below the supporting cross beams in the cable strand forming devices of all groups;
S6, sleeving a main cable steel wire into the spinning wheel, and pulling the spinning wheel back and forth from one shore to the other shore through a traction system, and going the spinning wheel: the movable wire falls on the riding wheel to be supported, and the dead wire falls in the corresponding strand grating groove; returning the spinning wheel: the live filaments fall into the corresponding strand grating grooves, and spinning is repeated to finish the forming of the corresponding strand braided cable.
By adopting the technical scheme, the invention has the following advantages:
1) The connecting sleeves at the two ends of the supporting cross beam can slide up and down freely on the upright post, so that the height of the supporting cross beam can be accurately adjusted, and the cable strand shape is effectively ensured to meet the design requirement;
2) The grid strands are transversely isolated, so that steel wires (dead wires and live wires) can fall into the positions of the corresponding strands in the spinning process, and the steel wires are arranged in a grid area according to the design requirement and are not confused with other strand steel wires; the riding wheel is used for supporting the movable yarn in the construction process of going spinning, and guiding the movable yarn on the riding wheel into the grille during return spinning, so that the spinning is ensured to go back and forth continuously;
3) According to the cable strand forming device, the catwalk door frame bottom cross beam and the catwalk are integrated, the lower winding quantity of the catwalk exceeds an allowable value along with the increase of the spinning quantity, and the cable strand forming device can drive the catwalk to be adjusted upwards together by tensioning the sag adjusting ropes penetrating through the bottoms of the supporting cross beams, so that the lower winding of the catwalk is controlled, the catwalk line type is parallel to the designed main cable line type, the actual stress and the deviation of the design value of cable strand steel wires in a bridging state after the completion of braiding meet the design requirement, and the cable strand spinning quality is guaranteed.
4) When the rope strand forming device is used for erecting a main rope of a suspension bridge by adopting an Air Spinning (AS) method, the rope strand forming device has the advantages of simple and convenient height adjustment, high precision, simple structure, convenient assembly and disassembly and the like, and the rope strand forming device is easy to ensure the construction quality and the line type and is strong in practicability.
The foregoing description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention more clearly understood, it can be implemented according to the content of the specification, and the following detailed description of the preferred embodiments of the present invention will be given with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an elevation view of a strand forming device;
FIG. 2 is a plan view of a strand forming device;
FIG. 3 is a side view of the strand forming device;
Reference numerals illustrate:
1. A column; 2. a support beam; 3. bottom cross beam of catwalk door frame; 4. a support bracket diagonal brace; 5. a support frame bottom girder; 6, a cross beam at the bottom of the support frame; 7. a grille; 8. a riding wheel; 9. a riding wheel supporting beam; 10. stiffening plates; 11. a connecting member; 12. an upper anchor beam; 13. a lower anchor beam; 14. adjusting the pull rod; 15. supporting a limit member; 16. a connection sleeve; 17. catwalk load-bearing ropes.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Embodiment one:
a first embodiment of the invention relates to a suspension bridge main strand forming device, with reference to fig. 1, comprising:
The catwalk door frame bottom beam 3, the bottom of the catwalk door frame bottom beam 3 is connected with a catwalk bearing rope 17;
the two upright posts 1 are respectively connected to the top of the bottom cross beam 3 of the catwalk door frame at vertical intervals through a supporting frame;
The support beam 2 is horizontally arranged between the two upright posts 1 and can move up and down along the upright posts 1;
the grids 7 are arranged in a plurality, and the grids 7 are uniformly fixed on the supporting cross beam 2 at intervals;
The riding wheels 8 at least comprise two riding wheels 8, and the riding wheels 8 are respectively connected to the grids 7 at the two ends of the supporting beam 2 through riding wheel supporting members and are positioned at the outer sides of the top ends of the grids 7;
The adjusting pull rods 14 at least comprise two adjusting pull rods 14, and the adjusting pull rods 14 are arranged on the outer sides of the two upright posts 1 in parallel; the upper end of the adjusting pull rod 14 is fixed on the upright post 1, and the lower end of the adjusting pull rod 14 is fixed at the end part of the supporting cross beam 2; the height of the supporting beam 2 is adjusted by adjusting the relative fixed position of the adjusting lever 14.
According to the catwalk forming device, the upright posts 1 are fixedly connected with the catwalk door frame bottom cross beam 3 through bolts, and the catwalk door frame bottom cross beam 3 is fixedly connected with the catwalk bearing ropes, so that the steel wire load born by the cable strand forming device is transmitted to a catwalk through the catwalk door frame bottom cross beam. The grid is mainly used for ensuring that steel wires (dead wires and live wires) fall into the corresponding set positions of the braided strands in the process of braiding the steel wires, and preventing the left and right adjacent strand steel wires from being confused. The riding wheel is arranged at the top end of the side grid and is mainly used for supporting the movable yarns in the process of going to spin. The adjusting pull rods are arranged on two sides of the cable strand forming frame and used for adjusting the height of the cable strand forming device, so that the plain strand type in the cable braiding process is ensured to meet the design requirement. The cable strand forming device is arranged on the catwalk at the same distance as the catwalk door frame, the arrangement height is consistent with the cable strand type, the installation and the adjustment are convenient, the precision is high, and the quality of the cable strand braiding of the main cable of the suspension bridge by adopting an air spinning method is ensured.
Embodiment two:
On the basis of the first embodiment, as shown in fig. 2 and 3, the support frame at least comprises a single tripod formed by a support frame diagonal brace 4, a support frame bottom longitudinal beam 5 and a support frame bottom cross beam 6, the number of the tripod is at least two, each upright post 1 is connected with the catwalk bottom cross beam 3 through a plurality of tripod, and the plurality of tripod are connected in parallel through a tripod bottom to form a whole.
Further, the upright posts 1 are fixedly connected with the support frame bottom cross beam 6 through bolts. The two ends of the supporting beam 2 are respectively and vertically fixed on the two upright posts through the connecting sleeve 16, and the connecting sleeves at the two ends of the supporting beam can freely slide up and down on the upright posts, so that the height of the supporting beam can be accurately adjusted, and the rope strand shape is effectively ensured to meet the design requirement.
Further, the adjusting pull rod 14 is of a full-wire structure, the upper end of the adjusting pull rod 14 is connected to the upright 1 through an upper anchoring beam 12 and a nut in a threaded manner, and the lower end of the adjusting pull rod 14 is connected to the end part of the supporting cross beam 2 through a lower anchoring beam 13 and a nut in a threaded manner; the height of the supporting beam 2 is adjusted by alternately loosening and tightening nuts at the upper and lower ends of the adjusting tie rod 14.
Embodiment III:
Further, as shown in fig. 1, the supporting roller supporting member at least comprises a supporting roller supporting beam 9 and a connecting member 11, wherein the supporting roller supporting beam 9 is vertically fixed on the top outer side of the outermost grille 7, and the connecting member 11 is fixed on the grille 7 and is positioned below the supporting roller supporting beam 9; the riding wheel 8 is fixed on the upper end of the riding wheel supporting beam 9, and a stiffening plate 10 is arranged between the lower end of the riding wheel supporting beam 9 and the connecting member 11.
It should be noted that the number of the grids 7 corresponds to the number of the main cable strands, and the net spacing between the adjacent grids 7 is the same as the strand diameter. Further, the grid 7 is inserted into the supporting beam 2 according to the strand spacing, and is fixedly connected with the supporting beam 2 through bolts. The main function of the grid 7 is to ensure that steel wires (dead wires and live wires) fall into the preset positions corresponding to the braided strands in the process of braiding the steel wires, so that the confusion of the steel wires of the strands adjacent to the left and the right is prevented.
Embodiment four:
On the basis of the embodiment, the strand forming devices are further provided with a plurality of groups, the plurality of groups of strand forming devices are arranged on the catwalk at intervals identical to the catwalk gate frame, and the height of each strand forming device is consistent with the strand type. The height of each strand forming device (namely the height of the supporting cross beam) on the catwalk can be adjusted to meet the strand type requirement by adjusting the pull rod 14.
According to the cable strand forming device, the catwalk door frame bottom cross beam and the catwalk are integrated, the lower winding quantity of the catwalk exceeds an allowable value along with the increase of the spinning quantity, and the cable strand forming device can drive the catwalk to be adjusted upwards together by tensioning the sag adjusting ropes penetrating through the bottoms of the supporting cross beams, so that the lower winding of the catwalk is controlled, the catwalk line type is parallel to the designed main cable line type, the actual stress and the deviation of the design value of cable strand steel wires in a bridging state after the completion of braiding meet the design requirement, and the cable strand spinning quality is guaranteed.
Fifth embodiment:
A construction method of a main cable strand forming device of a suspension bridge comprises the following steps:
S1, firstly, assembling a supporting beam 2, connecting sleeves 16 at two ends of the supporting beam and a lower anchoring beam 13 into a whole, and then symmetrically fixing two supporting and limiting members 15 at the lower end of the supporting beam 2;
S2, fixing the supporting cross beam 2 between the two upright posts 1 through connecting sleeves 16, and respectively connecting the outer sides of the two upright posts 1 with the anchoring beams 12; then, according to the design, the height of the supporting cross beam 2 is preliminarily adjusted, the upper end of the adjusting pull rod 14 is fixed on the upright post 1 through the upper anchoring beam 12, and the lower end of the adjusting pull rod 14 is fixed on the supporting cross beam 2 through the lower anchoring beam 13;
S3, welding the tops of two grids 7 positioned at the two end parts of the supporting beam 2 with a connecting piece 11, a riding wheel supporting beam 9 and a stiffening plate 10 respectively to form a whole, inserting the bottoms of the grids 7 into the supporting beam 2, and fastening by nuts; the riding wheel 8 is fixed on the riding wheel supporting beam 9; then sequentially installing the residual grids 7 according to the strand spacing;
S4, assembling a support bracket diagonal brace 4, a support bracket bottom longitudinal beam 5 and a support bracket bottom cross beam 6 into a triangular bracket, and assembling a support bracket upright post 1 and a catwalk door bracket bottom cross beam 3 into a whole through a plurality of triangular brackets;
S5, the assembled cable strand forming devices and the catwalk door frames are lowered to the design installation position group by group through door frame bearing ropes by means of a winch, the height of the supporting cross beam 2 is accurately adjusted according to the design elevation before the main cable is braided, and the catwalk sag adjusting ropes penetrate through supporting limiting members 15 below the supporting cross beam 2 in each group of cable strand forming devices;
S6, sleeving a main cable steel wire into the spinning wheel, and pulling the spinning wheel back and forth from one shore to the other shore through a traction system, and going the spinning wheel: the movable wire falls on the riding wheel 8 for supporting, and the dead wire falls in the groove of the corresponding strand grating 7; returning the spinning wheel: the live filaments fall into the grooves of the corresponding strand grids 7, and spinning is repeated to finish the formation of the corresponding strand braided cable.
Because stand 1 and catwalk pass through catwalk portal underframe crossbeam 3 and link as a whole, cable strand forming device receives the effect of steel wire part gravity load with catwalk jointly, receives the increase of spinning quantity, supports and catwalk and winds down jointly, in order to guarantee that cable strand steel wire stress and design stress deviation control after the bridge are in design standard allowed range, need guarantee catwalk line type and empty cable type of main cable unanimity at the steel wire cabling in-process, need control catwalk down the volume of winding in design allowed range, the catwalk down the volume of winding exceeds allowed range and need pass through the support beam bottom and support the sag adjustment rope of spacing component 15 through the traction and up-regulate catwalk, make its volume of winding down in allowed range.
In summary, the invention provides the main cable strand forming device for the suspension bridge, which is suitable for the construction of the main cable of the suspension bridge by an Air Spinning (AS) method, and has the advantages that: the grid strand is used for transverse isolation, so that steel wires (dead wires and live wires) can fall into the positions of the corresponding strands in the spinning process, and the steel wires are arranged in a grid area according to the design requirement and are not confused with other strand steel wires; the supporting wheels are arranged at the top ends of the grids at the two sides, so that the movable yarns are moved in the spinning process, the smooth spinning construction is ensured, and the movable yarns on the supporting wheels are guided into the grids during the return spinning, so that the spinning is ensured to go back and forth continuously; the height of the supporting cable strand beam is accurately adjusted through the adjusting pull rod 14, so that the cable strand type meets the design requirement; the number and the interval of the cable strand forming structures are the same as those of the catwalk door frames, the cable strand forming structures are connected with the catwalk into a whole, the catwalk lower winding quantity in the spinning braiding process is controlled within an allowable range through the catwalk sag adjusting rope passing through the lower part of the cross beam of each cable strand forming structure, and the line type and the stress difference after the main cable is formed are kept to meet the design requirement.
Parts of the above embodiments not specifically described are well known in the art and commonly used structures or means, and will not be described in detail herein.
Under the condition of no conflict, the technical features related to the examples can be combined with each other according to actual situations by a person skilled in the art so as to achieve corresponding technical effects, and specific details of the combination situations are not described in detail herein.
While the invention is susceptible of embodiments in accordance with the preferred embodiments, the invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention. The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the scope of the knowledge of those skilled in the art without departing from the spirit of the present invention, which is within the scope of the present invention.
Claims (5)
1. The utility model provides a suspension bridge main cable strand forming device which characterized in that: comprising
The catwalk door frame bottom beam (3), the bottom of the catwalk door frame bottom beam (3) is connected with a catwalk bearing rope (17);
The two upright posts (1) are respectively connected to the top of the catwalk door frame bottom cross beam (3) at vertical intervals through a supporting frame; the support frame at least comprises a single triangular bracket formed by a support frame diagonal brace (4), a support frame bottom longitudinal beam (5) and a support frame bottom cross beam (6), wherein the number of the triangular brackets is at least two, each upright post (1) is connected with the catwalk bottom cross beam (3) through a plurality of triangular brackets, and the triangular brackets are connected with each other through a triangular bracket bottom parallel connection to form a whole;
The support beam (2) is horizontally arranged between the two upright posts (1), and two ends of the support beam (2) are vertically fixed on the two upright posts (1) through connecting sleeves (16) respectively and can move up and down along the upright posts (1);
the grids (7) are arranged, and the grids (7) are uniformly fixed on the supporting cross beam (2) at intervals;
The riding wheels (8) at least comprise two riding wheels (8), and the riding wheels are respectively connected to grids (7) at the two ends of the supporting beam (2) through riding wheel supporting members and are positioned at the outer sides of the tops of the grids (7); the riding wheel supporting member at least comprises a riding wheel supporting beam (9) and a connecting member (11), wherein the riding wheel supporting beam (9) is vertically fixed on the outer side of the top of the outermost grid (7), and the connecting member (11) is fixed on the grid (7) and is positioned below the riding wheel supporting beam (9); the riding wheel (8) is fixed at the upper end of the riding wheel supporting beam (9), and a stiffening plate (10) is arranged between the lower end of the riding wheel supporting beam (9) and the connecting member (11);
The adjusting pull rods (14) at least comprise two adjusting pull rods (14) which are arranged on the outer sides of the two upright posts (1) in parallel; the adjusting pull rod (14) is of a full-wire structure, the upper end of the adjusting pull rod (14) is connected to the upright post (1) through an upper anchoring beam (12) and a nut in a threaded manner, and the lower end of the adjusting pull rod (14) is connected to the end part of the supporting cross beam (2) through a lower anchoring beam (13) and a nut in a threaded manner; the height of the supporting beam (2) is adjusted by alternately loosening and fastening nuts at the upper end and the lower end of the adjusting pull rod (14);
two supporting limiting members (15) used for penetrating the catwalk sag adjusting ropes are symmetrically arranged on two sides of the lower end of the supporting cross beam (2).
2. A suspension bridge main strand forming device as claimed in claim 1, wherein: the number of the grids (7) corresponds to the number of the main cable strands, and the net spacing between the adjacent grids (7) is equal to the diameter of each cable strand; the grids (7) are inserted into the supporting cross beam (2) according to strand intervals and fixedly connected with the supporting cross beam through bolts.
3. A suspension bridge main strand forming device as claimed in claim 1, wherein: the upright post (1) is fixedly connected with the support frame bottom cross beam (6) through bolts.
4. A suspension bridge main strand forming device according to any one of claims 1-3, wherein: the cable strand forming devices are arranged in a plurality of groups, the cable strand forming devices are arranged on the catwalk at intervals which are the same as the catwalk door frame, and the heights of the cable strand forming devices are consistent with the cable strand type.
5. A method of constructing a suspension bridge main rope strand forming device according to any one of claims 1 to 4, comprising the steps of:
S1, firstly, assembling a supporting cross beam (2), connecting sleeves (16) at two ends of the supporting cross beam and a lower anchoring beam (13) into a whole, and then symmetrically fixing two supporting limiting members (15) at the lower end of the supporting cross beam (2);
S2, fixing the supporting cross beam (2) between the two upright posts (1) through connecting sleeves (16), and respectively connecting the outer sides of the two upright posts (1) with the anchoring beams (12); then, according to the design, the height of the supporting cross beam (2) is preliminarily adjusted, the upper end of the adjusting pull rod (14) is fixed on the upright post (1) through the upper anchoring beam (12), and the lower end of the adjusting pull rod (14) is fixed on the supporting cross beam (2) through the lower anchoring beam (13);
S3, welding the tops of two grids (7) positioned at the two ends of the supporting beam (2) with the connecting member (11), the riding wheel supporting beam (9) and the stiffening plate (10) into a whole, inserting the bottoms of the grids (7) into the supporting beam (2), and fastening by nuts; the riding wheel (8) is fixed on the riding wheel supporting beam (9); then sequentially installing the residual grids (7) according to strand intervals;
S4, assembling a support bracket diagonal brace (4), a support bracket bottom longitudinal beam (5) and a support bracket bottom cross beam (6) into a triangular bracket, and assembling a support bracket upright post (1) and a catwalk door bracket bottom cross beam (3) into a whole through a plurality of triangular brackets;
S5, the assembled cable strand forming devices and catwalk door frames are lowered to the design installation position group by group through door frame bearing ropes by means of a winch, the height of the supporting cross beam (2) is accurately adjusted according to the design elevation before the main cable is braided, and the catwalk sag adjusting ropes penetrate through supporting limiting members (15) below the supporting cross beam (2) in each group of cable strand forming devices;
S6, sleeving a main cable steel wire into the spinning wheel, and pulling the spinning wheel back and forth from one shore to the other shore through a traction system, and going the spinning wheel: the movable wire falls on the riding wheel (8) to be supported, and the dead wire falls in the groove of the corresponding strand grating (7); returning the spinning wheel: the live filaments fall into grooves of corresponding strand grids (7), and spinning is repeated to finish the formation of corresponding strand braided cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010266627.7A CN111424548B (en) | 2020-04-07 | Main cable strand forming device of suspension bridge and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010266627.7A CN111424548B (en) | 2020-04-07 | Main cable strand forming device of suspension bridge and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111424548A CN111424548A (en) | 2020-07-17 |
| CN111424548B true CN111424548B (en) | 2024-05-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1441921A (en) * | 1972-08-04 | 1976-07-07 | Cleveland Bridge And Eng | Machine for reeling and unreeling wire |
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| CN110939069A (en) * | 2019-12-11 | 2020-03-31 | 湖北省路桥集团有限公司 | Construction method of suspension bridge catwalk |
| CN212477419U (en) * | 2020-04-07 | 2021-02-05 | 中交二公局第二工程有限公司 | Suspension bridge main push-towing rope strand forming device |
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| CN1864886A (en) * | 2005-05-18 | 2006-11-22 | 上海申佳金属制品有限公司 | Manufacturing method of zinc-coated steel wire for main rope of suspension bridge |
| CN103850184A (en) * | 2014-03-19 | 2014-06-11 | 中交一公局第一工程有限公司 | Suspension bridge main cable erecting device |
| CN203782578U (en) * | 2014-03-19 | 2014-08-20 | 中交一公局第一工程有限公司 | Foldable support pulley device for towing catwalk top by main cable strand of suspension bridge |
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| CN212477419U (en) * | 2020-04-07 | 2021-02-05 | 中交二公局第二工程有限公司 | Suspension bridge main push-towing rope strand forming device |
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