CN112227225B - Catwalk sag adjustment device for erecting main cable based on suspension bridge air spinning method and construction method thereof - Google Patents
Catwalk sag adjustment device for erecting main cable based on suspension bridge air spinning method and construction method thereof Download PDFInfo
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- CN112227225B CN112227225B CN202011318277.0A CN202011318277A CN112227225B CN 112227225 B CN112227225 B CN 112227225B CN 202011318277 A CN202011318277 A CN 202011318277A CN 112227225 B CN112227225 B CN 112227225B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000009987 spinning Methods 0.000 title claims abstract description 24
- 239000000725 suspension Substances 0.000 title claims abstract description 22
- 238000004873 anchoring Methods 0.000 claims abstract description 85
- 230000000149 penetrating effect Effects 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 3
- 238000000429 assembly Methods 0.000 claims 3
- 238000005452 bending Methods 0.000 description 5
- 238000009954 braiding Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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Abstract
The catwalk sag adjusting device for erecting the main cable based on the suspension bridge air spinning method and the construction method thereof adopt a separated adjusting method, namely, the mid-span catwalk and the side-span catwalk are respectively adjusted. The catwalk sag adjusting devices are arranged on two sides of the main cable saddle and mainly comprise anchor beams, anchor pull rods, adjusting ropes and jacks. One end of the anchoring pull rod is connected with the anchoring lug plate on the cable saddle or the grid reaction frame through a universal hinge, and the other end of the anchoring pull rod is fixed with the anchor beam through a nut. The sag adjusting rope passes through and is fixed with limiting devices below the cross beams of all the cable strand formers on the catwalk, and is used for the main span side: two ends of the adjusting rope are respectively anchored on the anchor beam through clamping plates; for the side span side: one end of the sag adjusting rope is anchored on the anchor beam, and the other end is connected with an anchoring component on the anchorage buttress. When the catwalk is bent downwards to exceed the allowable value, the penetrating jack pushes the anchor beam and the pull rod so as to tension the adjusting rope to drive the catwalk to wind up, and the purpose of catwalk sag adjustment is achieved.
Description
Technical Field
The invention relates to the field of construction of main cables of suspension bridges, in particular to a catwalk sag adjustment device for erecting main cables based on an aerial spinning method 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 the Air Spinning (AS) method, i.e. the wire is drawn back and forth at the bridge site with a spinning wheel to form the main strand. The construction of an Air Spinning (AS) method has a long history, and is still widely used abroad AS one of main methods of main cable construction at present, and under the influence of traditional construction, the main cable of the domestic suspension bridge is designed and constructed by adopting a prefabricated parallel cable 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 requirement of building an ultra-large span (more than 2000 m) suspension bridge across rivers, seas and canyons is more and more prominent, and compared with a prefabricated parallel strand (PPWS method) method, the problem of strand transportation and traction caused by overlarge weight of strands can be solved by adopting an Air Spinning (AS) method to erect an ultra-large span suspension bridge main cable; the catwalk can be designed into a flexible structure, so that the material consumption is low; the on-site steel wire braiding saves the cost of rope making in factories; the AS method for erecting the main cable has wide application prospect in the construction process of the super-large span suspension bridge.
At present, a constant tension control method is adopted for erecting a main cable by an Air Spinning (AS) method, and part of self weight of steel wires is transferred to a catwalk in the process of weaving the steel wires in the air, so that the catwalk is caused to flex down. After the catwalk is downwarped, the length of the steel wire continuously woven at the later stage is inconsistent with that of the steel wire woven at the earlier stage, and when the steel wires exist in one strand, uneven stress distribution of the same strand is caused, so that the structural safety is affected. Therefore, the catwalk sagging is required to be adjusted to return to the original linear shape.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a suspension bridge catwalk sag adjustment device and a construction method thereof, which are suitable for construction of a suspension bridge main cable by an Air Spinning (AS) method.
The catwalk sag adjustment device is characterized by comprising a cable saddle or grid reaction frame, a universal hinge structure, an anchoring pull rod, a catwalk sag adjustment rope and a catwalk sag adjustment piece;
The cable saddle or the grid counter-force frame is fixedly connected between two ends of the cable saddle or the grid counter-force frame and two ends of the anchoring beam in parallel;
one end of an anchoring pull rod in the sag adjustment assembly is fixedly connected with one end of the cable saddle or the grid reaction frame through the universal hinge structure, and the other end of the anchoring pull rod is fixedly connected with one end of the same side of the anchoring beam;
One ends of two catwalk sag adjustment ropes are fixed on the anchoring beam and are arranged between the two anchoring pull rods in parallel;
The catwalk sag adjusting piece is arranged at a hole position corresponding to an anchoring pull rod on the anchoring beam of the rope saddle or the grid counter-force frame;
a plurality of strand forming devices are arranged on the catwalk sag adjustment rope.
The universal hinge structure is composed of a first connecting piece, a second connecting piece, a first connecting pin shaft and a second connecting pin shaft;
the first connecting piece is U-shaped, and the second connecting piece consists of a U-shaped connecting part and an arc-shaped connecting lug plate fixedly connected with the outer side of the bottom of the U-shaped connecting part;
the first connecting piece is connected with the arc-shaped connecting lug plate through a first connecting pin shaft;
the second connecting pin shaft penetrates through the through hole on the U-shaped connecting part to be connected with an anchoring lug plate fixed on the cable saddle or the grid reaction frame;
The first connecting pin shaft and the second connecting pin shaft are mutually perpendicular;
the bottom of the first connecting piece is fixedly connected with the anchoring pull rod through a connecting nut.
The catwalk sag adjusting piece is composed of a supporting split heads and a penetrating jack, wherein the supporting split heads are arranged between the anchoring beam and the penetrating jack.
The catwalk sag adjustment rope passes through the anchoring beam, and one end, close to the cable saddle side, is fixed through a first base plate clung to the anchoring beam and a clamping plate arranged between the anti-slip clamping rope and the first base plate.
The catwalk sag adjustment device further comprises a loose cable saddle buttress anchoring beam formed by the first supporting beam and the second supporting beam, the anchoring lugs are welded on the anchoring beam, the loose cable catwalk sag adjustment rope is connected with the anchoring lugs welded on the loose cable saddle buttress anchoring beam through the pin shafts, the loose cable catwalk sag adjustment rope is fastened through the rope clamps, and the loose cable catwalk sag adjustment rope is parallel to the main cable.
A catwalk sag adjustment device construction method based on a suspension bridge aerial spinning method for erecting a main cable comprises the following steps:
S1, finishing the installation of a universal hinge structure, connecting the universal hinge structure with a main cable saddle or a grid reaction frame through an anchoring lug plate, and finishing the connection between a first connecting piece and the tail end of an anchoring pull rod through a connecting nut;
S2, connecting all the anchor beams into a whole through an anchor beam connecting plate, and fixing the front ends of the anchor pull rods on the anchor beams through anchor pull rod backing plates and fastening nuts;
S3, one end of the catwalk sag adjustment rope penetrates through the anchoring beam and is anchored on the anchoring beam by adopting a clamping plate and an anti-skid clamping rope;
for the main span, the rope head at the other end of the catwalk sag adjustment rope sequentially passes through a limiting device below each rope strand former cross beam arranged on the main span catwalk, and after the rope head reaches the anchor beam at the middle span side of the main rope saddle on the opposite bank, the rope head is anchored by adopting a clamping plate and an anti-skid clamping rope;
For the side of the side span, a rope head at the other end of the catwalk sag adjustment rope sequentially passes through a limiting device below a rope strand former beam arranged on the catwalk at the side of the side span, and after reaching a scattered rope saddle buttress anchoring beam on the top surface of the scattered rope saddle buttress, the other end of the catwalk sag adjustment rope is anchored through a pin shaft and a rope clamp;
S4, connecting the cable strand former with the catwalk through a catwalk portal bottom cross beam to form a whole, transmitting the weight of the steel wire part to the catwalk through cable strand formation in the process of steel wire braiding, gradually bending down the catwalk along with the increase of the spinning quantity, suspending spinning operation when the bending down amount of the catwalk exceeds an allowable value, sequentially installing a split heads and a penetrating jack on an anchoring beam, screwing down a locknut arranged at the top of the penetrating jack, unscrewing the locknut, synchronously controlling the penetrating jack, pushing the anchoring beam to the cable saddle side, tensioning a catwalk sag adjusting rope to drive the catwalk to bend, locking the locknut after the catwalk sag adjusting rope is restored to an initial state position, and anchoring an anchoring pull rod with the anchoring beam, and removing the locknut, the penetrating jack and supporting the split heads.
The invention has the following advantages:
The catwalk sag adjustment adopts a separation type adjustment method, and the main span and the side span catwalk can be adjusted simultaneously, so that the catwalk adjustment tension is reduced, the construction difficulty is reduced, and the construction efficiency is improved; 2. the anchoring pull rod is connected with the main cable saddle or the grid reaction frame through the universal hinge, and when the catwalk sag is adjusted, the pull rod can adapt to the sag adjustment rope to rotate in a linear mode and is always in a tension state, so that the stress safety of the structure is ensured; 3. for an ultra-large-span suspension bridge, the main-span catwalk sag adjustment amount is large, the two sets of catwalk sag adjustment devices of the middle span can simultaneously adjust the catwalk sag of the middle span, the adjustment travel is large, and the adjustment capability is strong; 4. the catwalk sag adjustment ropes are connected with the cable strand formers fixed on the catwalk, and when the jack pushes the anchor beam, the adjustment ropes at the cable strand formers are uniformly stressed, so that the upward deflection of the catwalk can be accurately controlled, and the catwalk is ensured to recover to an initial linear shape; 5. the catwalk sag adjustment device is simple in manufacture, convenient to operate, high in adjustment capacity and high in adjustment precision, improves rope making precision of rope strands, reduces the difference of steel wire stress in the rope strands, and ensures the erection quality of the rope strands.
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
FIG. 1 is a plan view of a catwalk sag adjustment device;
FIG. 2 is a side view of the catwalk sag adjustment device anchor beam;
FIG. 3 is a side view of the catwalk sag adjustment device;
FIG. 4 is a cross-sectional view of the strand former and catwalk;
FIG. 5 is an elevation view of the anchor beam at the catwalk sag adjuster cable saddle pier;
FIG. 6 is a side view of the anchor beam at the catwalk sag adjuster cable saddle pier;
FIG. 7 is a schematic view of a second connector structure;
fig. 8 is a schematic view of the construction operation of the catwalk sag adjustment device for erecting a main cable based on the suspension bridge aerial spinning method.
Reference numerals illustrate:
0. A cable saddle or grille reaction frame; 1. an anchor tie rod; 2. an anchor beam; 3. catwalk sag adjustment cords; 4. a clamping plate; 5. an anti-slip clamping rope; 6. a first connector; 7. a first connecting pin; 8. a second connector; 9. a coupling nut; 10. a first connecting pin; 11. anchoring the ear plate; 12. supporting a split heads; 13. a center-penetrating jack; 14. a locknut; 15. a fastening nut; 17. anchoring the tie rod backing plate; 18. a sag adjustment rope backing plate; 19. an anchor beam connecting plate; 20. a first support beam; 21. a second support beam; 22. an anchor ear; 23. a pin shaft; 24. a strand former; 25. a limiting device; 26. a U-shaped connecting part; 27. arc-shaped connecting ear plates; 28. a catwalk handrail rope; 29. catwalk sag adjuster.
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 present invention relates to a catwalk sag adjustment device for erecting a main cable by a suspension bridge air yarn method, the device including, with reference to fig. 1, 2, and 3:
The anchor pull rod 1, the anchor pull rod 1 contains 2 at least, anchor pull rod 1 one end links to each other fixedly with the universal hinge structure, another end passes the anchor roof beam 2 and anchors through anchor pull rod backing plate 17 and fastening nut 15;
The first connecting piece 6 and the second connecting piece 8 form a universal hinge structure capable of adapting to rotation together through a first connecting pin shaft 7 and a second connecting pin shaft 10 (specifically, the first connecting piece 6 is U-shaped, the second connecting piece 8 is composed of a U-shaped connecting part 26 shown in figure 7 and an arc-shaped connecting lug plate 27 fixedly connected with the outer side of the bottom of the U-shaped connecting part 26, the first connecting piece 6 is connected with the arc-shaped connecting lug plate 27 through the first connecting pin shaft 7, the second connecting pin shaft 10 penetrates through a through hole on the U-shaped connecting part 26 to be connected with an anchoring lug plate 11 fixed on a cable saddle or a grid counter-force frame 0, and is fixed with the anchoring lug plate 11 fixed on the cable saddle or the grid counter-force frame 0 through the second connecting pin shaft 10; the anchoring beam 2 anchors the catwalk sag adjustment rope 3 through the sag adjustment rope backing plate 18, the clamping plate 4 and the anti-slip clamping rope 5 at the side close to the rope saddle. The anchoring beam 2 is connected into a whole through the connecting plate 19, and the clamping plates 16 are respectively arranged at the anchoring supporting positions of the anchoring beam pull rod 1 and the catwalk sag adjusting rope 3, so that the structural stress is ensured to be reliable.
Embodiment two:
On the basis of the first embodiment, further, as shown in fig. 4, 5 and 6, 2 loose-rope catwalk sag adjustment ropes 3 are arranged and pass through strand forming devices arranged on catwalks at regular intervals; the first supporting beam 20 and the second supporting beam 21 form a scattered cable saddle buttress anchoring beam, the anchoring lug 22 is welded on the scattered cable saddle buttress anchoring beam, the scattered cable catwalk sag adjustment rope 3 is anchored through the pin shaft 23 and the rope clamp, and the setting position of the anchoring lug 22 on the scattered cable saddle buttress anchoring beam is required to ensure that the scattered cable catwalk sag adjustment rope 3 is parallel to the main cable.
Embodiment III:
On the basis of the example, a separate adjustment method is further adopted for catwalk sag adjustment, catwalk sag adjustment devices are arranged on catwalk midspan and side spans, and catwalk midspan and side span sag are adjusted respectively;
Further, for a main span catwalk sag adjuster 29, an anchor beam 2, an anchor beam pull rod 1 and a connecting device are respectively arranged on the two-bank tower top cable saddle near the main span side and are fixedly connected with the cable saddle, and a catwalk sag adjuster rope 3 is respectively anchored on the two-bank midspan side anchor beams through a clamping plate 4 and an anti-slip clamping rope 5;
Further to side catwalk sag adjustment spare 29, set up anchor beam 2, anchor beam pull rod 1 and connecting device and grid reaction frame on top of the tower side and be connected fixedly, scattered cable saddle buttress top surface sets up and constitutes scattered cable saddle buttress anchor beam by first supporting beam 20 and second supporting beam 21, catwalk sag adjustment rope 3 one end passes through splint 4 and anti-skidding card rope 5 anchor on the top of the tower side anchor beam 2, the other end of catwalk sag adjustment rope 3 passes on the side catwalk of side and sets up cable strand former crossbeam bottom surface stop device at certain distance on the side catwalk, with the scattered cable saddle buttress anchor beam that sets up at scattered cable saddle buttress top surface pass through anchor ear 22, connecting pin 23, anti-skidding card rope is fixed.
Embodiment four:
On the basis of the above example, the catwalk sag adjusting piece is further provided with the supporting split heads 12 and the penetrating jacks 13 at positions, corresponding to the anchor beam pull rod holes, on the anchor beam 2, respectively, and the catwalk is gradually bent downwards along with the increase of the number of spinning layers in the cabling process of the steel wire on the catwalk, and after the amount of bending exceeds an allowable value, the penetrating jacks 13 synchronously push the anchor beam 2 and the anchor pull rod 1 so as to tension an adjusting rope to drive the catwalk to wind upwards, thereby realizing the purpose of catwalk sag adjustment.
Fifth embodiment:
A catwalk sag adjustment device construction method based on a suspension bridge Aerial Spinning (AS) method for erecting a main cable specifically comprises the following steps in combination with fig. 8:
s1, a first connecting piece 6, a second connecting piece 8 and a first connecting pin shaft 7 are integrated and are connected with an anchoring lug plate 11 welded on the main cable saddle or grid counter force through a second connecting pin shaft 10 into a whole, and the installation anchoring pull rod 1 is fixed on the first connecting piece 6 through a connecting nut 9.
S2, the anchor beam 2 is connected into a whole through an anchor pull rod backing plate 17, a sag adjustment rope backing plate 18 and an anchor beam connecting plate 19, and the front end of the anchor pull rod 1 passes through the anchor beam 2 and is fixed on the anchor beam 2 through a fastening nut 15;
S3, one end of a catwalk sag adjustment rope 3 passes through the anchoring beam 2 and is anchored on the anchoring beam 2 by adopting a clamping plate 4 and an anti-slip clamping rope 5, and for a main span, the rope head at the other end of the catwalk sag adjustment rope 3 sequentially passes through a limiting device below each rope strand former beam arranged on the catwalk, and after the rope head reaches a mid-span side anchoring beam of a main rope saddle on the opposite side, the rope head is anchored by adopting the clamping plate 4 and the anti-slip clamping rope 5; for the side of the side span, the rope head at the other end of the catwalk sag adjustment rope 3 sequentially passes through a limiting device below a rope strand former beam arranged on the catwalk of the side span, and is fixed through an anchoring lug 22, a connecting pin 23 and a rope clip after reaching a scattered rope saddle buttress anchoring beam on the top surface of the scattered rope saddle buttress.
S4, connecting the cable strand former with a catwalk through a catwalk portal bottom beam to form a whole, transmitting the weight of a steel wire part to the catwalk through cable strand formation in the process of steel wire braiding, gradually bending down the catwalk along with the increase of the spinning quantity, suspending spinning operation when the bending down amount of the catwalk exceeds an allowable value, sequentially installing a support split heads 12 and a penetrating jack 13 on an anchoring beam 2, screwing down a locknut 14, unscrewing a fastening nut 15, synchronously controlling the penetrating jack 13, pushing the anchoring beam 2 to the cable saddle side, tensioning a catwalk sag adjusting rope 3 to drive the catwalk to bend, locking the fastening nut 15, anchoring an anchoring pull rod 1 with the anchoring beam 2, and removing the locknut 14, the penetrating jack 13 and the support split heads 12.
In summary, the catwalk sag adjustment device suitable for suspension bridge main cable Air Spinning (AS) method construction has the advantages that:
The catwalk sag adjustment device is simple in manufacture, convenient to operate, high in adjustment capacity and high in adjustment precision, improves rope making precision of rope strands, reduces the difference of steel wire stress in the rope strands, and ensures the erection quality of the rope strands.
The catwalk sag adjustment adopts a separation type adjustment method, and the main span and the side span catwalk can be adjusted simultaneously, so that the catwalk adjustment tension is reduced, the construction difficulty is reduced, and the construction efficiency is improved; the anchoring pull rod is connected with the main cable saddle or the grid reaction frame through the universal hinge, and when the catwalk sag is adjusted, the pull rod can adapt to the sag adjustment rope to rotate in a linear mode and is always in a tension state, so that the stress safety of the structure is ensured; for an ultra-large-span suspension bridge, the main-span catwalk sag adjustment amount is large, the two sets of catwalk sag adjustment devices of the middle span can simultaneously adjust the catwalk sag of the middle span, the adjustment travel is large, and the adjustment capability is strong; the catwalk sag adjusting ropes are connected with the rope strand formers fixed on the catwalk, and when the jack pushes the anchor beam, the adjusting ropes at the rope strand formers are uniformly stressed, so that the upward deflection of the catwalk can be accurately controlled, and the catwalk is ensured to recover to an initial linear shape.
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 (3)
1. Catwalk sag adjustment device based on suspension bridge aerial spinning method erects main push-towing rope, its characterized in that: comprises a cable saddle or grid reaction frame (0), a universal hinge structure, an anchor pull rod (1), a catwalk sag adjustment rope (3) and a catwalk sag adjustment piece (29);
The catwalk sag adjustment assembly comprises a group of catwalk sag adjustment assemblies, at least two groups of catwalk sag adjustment assemblies, an anchor pull rod (1), a catwalk sag adjustment rope (3) and a catwalk sag adjustment member (29), wherein the catwalk sag adjustment assemblies are fixedly connected between two ends of the cable saddle or the grille reaction frame (0) and two ends of the anchor beam (2) in parallel;
One end of an anchoring pull rod (1) in the catwalk sag adjustment assembly is fixedly connected with one end of the cable saddle or the grid counter-force frame (0) through the universal hinge structure, and the other end of the anchoring pull rod (1) is fixedly connected with one end of the same side of the anchoring beam (2);
One end of each catwalk sag adjustment rope (3) is fixed on each anchoring beam (2) and is arranged between the two anchoring pull rods (1) in parallel;
the catwalk sag adjusting piece (29) is arranged at a hole position corresponding to the anchoring pull rod (1) on the anchoring beam (2) and deviating from the cable saddle or the grid counter-force frame (0);
A plurality of strand formers (24) are arranged on the catwalk sag adjustment rope (3);
The universal hinge structure is composed of a first connecting piece (6), a second connecting piece (8), a first connecting pin shaft (7) and a second connecting pin shaft (10);
The first connecting piece (6) is U-shaped, and the second connecting piece (8) is composed of a U-shaped connecting part (26) and an arc-shaped connecting lug plate (27) fixedly connected with the outer side of the bottom of the U-shaped connecting part (26);
the first connecting piece (6) is connected with the arc-shaped connecting lug plate (27) through a first connecting pin shaft (7);
The second connecting pin shaft (10) penetrates through a perforation on the U-shaped connecting part (26) to be connected with an anchoring lug plate (11) fixed on the cable saddle or the grid counter-force frame (0);
the first connecting pin shaft (7) and the second connecting pin shaft (10) are mutually perpendicular;
The bottom of the first connecting piece (6) is fixedly connected with the anchoring pull rod (1) through a connecting nut (9);
the catwalk sag adjusting piece (29) is composed of a supporting split heads (12), a penetrating jack (13) and a locknut (14) at the top of the penetrating jack (13), wherein the supporting split heads (12) are arranged between the anchoring beam (2) and the penetrating jack (13);
The catwalk sag adjustment rope (3) passes through the anchor beam (2) and one end close to the rope saddle side is fixed through a sag adjustment rope base plate (18) clung to the anchor beam (2) and a clamping plate (4) arranged between the anti-slip clamping rope (5) and the sag adjustment rope base plate (18).
2. The catwalk sag adjustment device for erecting a main cable based on a suspension bridge air spinning method as claimed in claim 1, wherein: the cable hanging device is characterized by further comprising a cable hanging saddle buttress anchoring beam which is composed of a first supporting beam (20) and a second supporting beam (21), wherein an anchoring lug (22) is welded on the anchoring beam (2), a cable hanging catwalk hanging degree adjusting rope is connected with the anchoring lug (22) welded on the cable hanging saddle buttress anchoring beam through a pin shaft (23), the cable hanging degree adjusting rope is fastened through a rope clamp, and the cable hanging degree adjusting rope is parallel to a main cable.
3. The construction method of the catwalk sag adjustment device for erecting a main cable based on a suspension bridge air spinning method as claimed in claim 1, comprising the steps of:
s1, finishing the installation of a universal hinge structure, connecting the universal hinge structure with a cable saddle or a grid counter-force frame (0) through an anchoring lug plate (11), and then finishing the connection of a first connecting piece (6) and the tail end of an anchoring pull rod (1) through a connecting nut (9);
S2, connecting all the anchor beams (2) into a whole through an anchor beam connecting plate (19), and fixing the front ends of the anchor pull rods (1) on the anchor beams (2) through anchor beam (2) and anchor pull rod backing plates (17) and fastening nuts (15);
s3, one end of the catwalk sag adjustment rope (3) penetrates through the anchoring beam (2) and is anchored on the anchoring beam (2) by adopting the clamping plate (4) and the anti-slip clamping rope (5);
For a main span, the rope head at the other end of the catwalk sag adjustment rope (3) sequentially passes through a limiting device (25) below a cross beam of each rope strand former (24) arranged on the main span catwalk, and after the rope head reaches an anchoring beam at the middle span side of a coastal rope saddle, the rope head is anchored by adopting a clamping plate (4) and an anti-skid clamping rope (5);
for the side of the side span, a rope head at the other end of the catwalk sag adjustment rope (3) sequentially passes through a limiting device (25) below a cross beam of a rope strand former (24) arranged on the catwalk at the side span, and after reaching a scattered rope saddle pier anchoring beam on the top surface of a scattered rope saddle pier, the other end of the catwalk sag adjustment rope (3) is anchored through a pin shaft and a rope clamp;
S4, the cable strand former is connected with a catwalk through a catwalk portal bottom cross beam and is integrated with the catwalk, the weight of a steel wire part is transferred to the catwalk through cable strand forming, the catwalk is gradually scratched along with the increase of the spinning quantity, when the catwalk scratched quantity exceeds an allowable value, spinning operation is suspended, a split heads (12) and a penetrating jack (13) are sequentially installed on an anchoring beam (2), a locknut (14) arranged at the top of the penetrating jack (13) is screwed down, a fastening nut (15) is unscrewed, the penetrating jack (13) is synchronously controlled, the anchoring beam (2) is pushed to the cable saddle side, so that a catwalk sag adjusting rope (3) is tensioned to drive the catwalk to be coiled, after the catwalk is restored to an initial state position, a fastening nut (15) is locked, an anchoring pull rod (1) and the anchoring beam (2) are anchored, and the locknut (14), the penetrating jack (13) and the supporting split heads (12) are removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011318277.0A CN112227225B (en) | 2020-11-23 | 2020-11-23 | Catwalk sag adjustment device for erecting main cable based on suspension bridge air spinning method and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011318277.0A CN112227225B (en) | 2020-11-23 | 2020-11-23 | Catwalk sag adjustment device for erecting main cable based on suspension bridge air spinning method and construction method thereof |
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| CN112878201B (en) * | 2021-01-22 | 2024-05-31 | 中交二公局第二工程有限公司 | Auxiliary wire arranging mechanism |
| CN113309003B (en) * | 2021-06-17 | 2024-05-31 | 中交二公局第二工程有限公司 | Cable strand adjusting device and method for erecting main cable by suspension bridge aerial spinning method |
| CN114032752B (en) * | 2021-11-15 | 2023-12-26 | 中铁大桥局集团有限公司 | Main tower grating suitable for separated catwalk and main tower side anchoring method |
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