CN112195784B - Catwalk sag adjustment system and adjustment method for erecting main cable by adopting air spinning method - Google Patents
Catwalk sag adjustment system and adjustment method for erecting main cable by adopting air spinning method Download PDFInfo
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- CN112195784B CN112195784B CN202010966834.3A CN202010966834A CN112195784B CN 112195784 B CN112195784 B CN 112195784B CN 202010966834 A CN202010966834 A CN 202010966834A CN 112195784 B CN112195784 B CN 112195784B
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D5/00—Control of dimensions of material
Abstract
The invention provides a catwalk sag adjustment system and a catwalk sag adjustment method for erecting a main cable by adopting an air spinning method, wherein the catwalk sag adjustment system comprises a catwalk bearing cable and a catwalk beam, a cable strand former is installed on the catwalk beam, two threaded steel cables are hung on each bridge tower, one end of each threaded steel cable is hinged to the corresponding bridge tower, the other end of each threaded steel cable is a free end, a pushing device penetrates through the free end, and the pushing device is electrically connected to a displacement sensor arranged at the midspan position of the catwalk bearing cable; bearing beams which are abutted with the pushing device are bridged between the two thread steel cables, a pair of catwalk verticality adjusting ropes are erected between the bearing beams, and the catwalk verticality adjusting ropes penetrate through the connecting device. The displacement sensor automatically monitors the catwalk downwarping value and transmits the downwarping value to the pushing device, and the pushing device judges the downwarping value y and sets a downwarping limit value y0If y > y0The top pushing device adjusts the sag of the catwalk through the tensioning catwalk sag adjusting rope, so that the forming precision of the main cable is controlled, and the whole process is simple and convenient.
Description
Technical Field
The invention belongs to the field of bridge engineering, and particularly relates to a catwalk sag adjusting system and a catwalk sag adjusting method for erecting a main cable by adopting an air spinning method.
Background
At present, the erection method of the main cable of the suspension bridge at home and abroad mainly comprises two methods, namely a prefabricated parallel strand method (PPWS method for short) and an aerial spinning method (AS method for short). When the AS method is adopted to erect the main cable of the suspension bridge, the spinning tension is 80-85 percent of the free suspension tension of the steel wire, namely 15 to 20 percent of the weight of the steel wire falls into the strand former, the strand former can directly transfer the load to the catwalk, the vertical load born by the catwalk is larger and larger along with the increase of the spinning quantity, therefore, the steel wires can be gradually downwarped, if the downwarped value of the catwalk is too large, the stress of the steel wires on different layers is uneven, and the problems of strand torsion, steel wire winding, steel wire parallelism and unqualified porosity of the cable after tight cable tightening can be caused in the later period, the forming quality of the main cable is influenced finally, therefore, a limit value must be set for the catwalk downwarping value, and when the catwalk downwarping value exceeds the limit value, the sagging of the catwalk is adjusted by using a catwalk sagging adjustment system, the sagging of the catwalk is generally restored to the initial state, so that the forming quality of the main cable can be ensured.
In the traditional method, the downwarping value of the catwalk needs to be monitored at any time (generally, the downwarping value is directly measured through a total station), when the downwarping amount exceeds the limit, a jack is manually operated to stretch a catwalk adjusting rope, the sagging degree of the catwalk is recovered to the initial state, the whole process is complicated, in order to ensure that the downwarping of the catwalk does not exceed the limit, the downwarping value of the catwalk needs to be monitored at any time, time and labor are wasted, and when the downwarping value is closer to the limit value, the monitoring frequency is gradually increased, so that the workload is greatly increased.
Disclosure of Invention
The embodiment of the invention aims to provide a catwalk verticality adjusting system and a catwalk verticality adjusting method for erecting a main cable by adopting an air spinning method, so as to overcome the technical defects.
In order to solve the technical problem, the invention provides a catwalk sag adjustment system for erecting a main cable by adopting an air spinning method, which comprises two catwalk bearing cables erected between two bridge towers, wherein a plurality of catwalk cross beams are uniformly distributed at intervals along the length direction of the two catwalk bearing cables, each catwalk cross beam is provided with a cable strand former, each bridge tower is hung with at least two threaded steel cables, one end of each threaded steel cable is hinged in a tower top embedded part of the bridge tower, the other end of each threaded steel cable is a free end, a pushing device is arranged at the free end in a penetrating way, and the pushing device is electrically connected with a displacement sensor arranged at the midspan position of the catwalk bearing cable;
a bearing beam is arranged between two threaded steel cables on each bridge tower in a spanning mode, the bearing beams are mutually abutted to pushing devices on the threaded steel cables, a pair of catwalk sag adjusting ropes is erected between the two bearing beams, the catwalk sag adjusting ropes are installed on a connecting device in a penetrating mode, and the connecting device is located between the rope strand former and a catwalk cross beam.
Further, the pushing device comprises a fastener, a reaction plate and a piercing jack which sequentially penetrate along the length direction of the threaded steel cable, wherein the fastener is screwed and abutted against one plate surface of the reaction plate through the threaded steel cable, the other plate surface of the reaction plate is abutted against the bottom end plate of the piercing jack, and the piston head of the piercing jack is abutted against the bearing beam;
the pushing device further comprises an oil pressure pump station and an oil pressure controller, the center penetrating jack is communicated with the oil pressure pump station through an oil way, the oil pressure pump station is electrically connected with the oil pressure controller, and the oil pressure controller is in communication connection with the displacement sensor.
Further, strand former anchor is in catwalk crossbeam, and both arrange from top to bottom and form the cavity between the two, place connecting device in the cavity, and connecting device includes two parallels and relative risers that link to each other through the bolt, and the clearance between two risers divide into two upper and lower cavitys, wherein goes up the internal V type recess wheel that is equipped with of cavity, and lower cavity supplies catwalk sag adjustment rope to pass.
Preferably, the two vertical plates are connected through at least two bolts which are vertically arranged and are parallel to each other, each bolt is perpendicular to the plate surface of each vertical plate, the upper bolt is sleeved with the V-shaped groove wheel and can rotate around the upper bolt under the extrusion of the catwalk sag adjustment rope, and the catwalk sag adjustment rope is located in a space between the V-shaped groove of the V-shaped groove wheel and the lower bolt.
Preferably, the catwalk verticality adjusting rope is anchored to the bearing beam through a steel wire rope clamping device.
Preferably, the bearing beam is made of section steel, and the catwalk sag adjusting rope is a steel wire rope with the diameter phi of 36 mm.
The invention also provides a catwalk sag adjustment method for erecting the main cable by adopting the air spinning method, which at least comprises a catwalk sag adjustment system for erecting the main cable by adopting the air spinning method, and comprises the following steps:
s001, acquiring lower deflection limit value y of target catwalk0Will be down-warp limit y0Inputting each pushing device;
s002, mounting a displacement sensor at a mid-span position of a catwalk bearing rope of the target catwalk;
s003, a displacement sensor acquires a downwarping value y of the catwalk bearing cable, wherein the downwarping value y is the downwarping value y of the target catwalk, and the downwarping value y of the target catwalk is transmitted to each pushing device;
s004. each pushing device compares the lower deflection limit value y0And a down-warp value y, if y > y0Each pushing device pushes a corresponding bearing beam, the bearing beam drives the catwalk sag adjustment rope to approach to the bridge tower on the same side, the catwalk sag adjustment rope is tensioned, meanwhile, the connecting device lifts the cable strand former, the target catwalk is unloaded, and finally the downwarp value y =0 in the initial state is recovered;
s005, keeping the downwarping value y =0 of the target catwalk, and keeping the pushing device and the bearing beam in the current state;
s006, circulating S003 to S005 until all strand spinning is finished.
Further, the method for adjusting the vertical degree of the catwalk for erecting the main cable by adopting the air spinning method comprises the following steps:
step one, acquiring a lower deflection limit value y of a target catwalk0Will be down-warp limit y0Inputting an oil pressure controller;
secondly, mounting a displacement sensor at the mid-span position of a catwalk bearing rope of the target catwalk;
thirdly, the displacement sensor acquires a downwarping value y of the catwalk bearing cable, wherein the downwarping value y is the downwarping value y of the target catwalk, and the downwarping value y of the target catwalk is transmitted to the oil pressure controller;
step four, the oil pressure controller compares the lower deflection limit value y0And a down-warp value y, if y > y0The hydraulic controller controls the hydraulic pump station to work, hydraulic oil is supplied to the through jack by the hydraulic pump station, the through jack pushes the corresponding bearing beam, the bearing beam drives the catwalk sag adjustment rope to approach to the bridge tower on the same side, the catwalk sag adjustment rope is tensioned, the cable strand former is lifted through the connecting device, the target catwalk is unloaded, and finally the down-deflection value y =0 in the initial state is recovered;
step five, keeping the downwarping value y =0 of the target catwalk and maintaining the pushing device and the bearing beam in the current state;
and step six, the step three to the step five are circulated until all strand spinning is finished.
The invention has the following beneficial effects:
through displacement sensor automatic monitoring catwalk downwarping value to directly give oil pressure controller with this value, oil pressure controller can differentiate this downwarping value y and set for downwarping limit value y0If y > y0The oil pressure controller can adjust the sag of the catwalk through the tensioning catwalk sag adjusting rope, the forming precision of the main cable is controlled, the whole process is simple, the system is convenient and automatic, and the system has high practical significance and research value.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a front view of a catwalk sag adjustment system for erecting a main cable using an air-laid process.
Fig. 2 is a structural view of the thruster.
Fig. 3 is a diagram showing the positional relationship between the strand former and the catwalk sag adjustment cord.
Fig. 4 is a control flowchart of a catwalk sag adjustment method for erecting a main cable by an air spinning method.
Description of reference numerals:
1. a catwalk load bearing cable; 2. a catwalk sag adjustment rope; 3. a strand former; 4. a catwalk cross beam; 5. a bridge tower; 6. a displacement sensor; 7. a center-penetrating jack; 8. an oil pressure pump station; 9. an oil pressure controller; 10. a cable strand; 11. a threaded steel cable; 12. a wire rope holder; 13. a reaction plate; 14. a fastener; 15. a bearing beam; 16. and (4) a connecting device.
Detailed Description
The following description is given by way of example of the present invention and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
In the present invention, the upper, lower, left, and right in the drawings are regarded as the upper, lower, left, and right of the catwalk sag adjustment system for erecting a main cable by the air spinning method described in the present specification.
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 embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present 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, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those 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.
The first embodiment:
the invention relates to a catwalk sag adjustment system for erecting a main cable by adopting an air spinning method, which comprises two catwalk bearing cables 1 erected between two bridge towers 5, wherein a plurality of catwalk cross beams 4 are uniformly distributed along the length direction of the two catwalk bearing cables 1 at intervals, each catwalk cross beam 4 is provided with a cable strand former 3, each bridge tower 5 is hung with at least two threaded steel cables 11, one end of each threaded steel cable 11 is hinged in a tower top embedded part of the bridge tower 5, the other end of each threaded steel cable 11 is a free end, a pushing device is arranged at the free end in a penetrating way, and the pushing device is electrically connected with a displacement sensor 6 distributed at the midspan position of the catwalk bearing cable 1;
a bearing beam 15 is arranged between two threaded steel cables 11 on each bridge tower 5 in a spanning mode, the bearing beams 15 are abutted to pushing devices on the threaded steel cables 11, a pair of catwalk sag adjusting ropes 2 are erected between the two bearing beams 15, the catwalk sag adjusting ropes 2 are installed on a connecting device 16 in a penetrating mode, and the connecting device 16 is located between the strand former 3 and the catwalk cross beam 4.
The working process of the catwalk sag adjustment system for erecting the main cable by adopting the air spinning method is as follows:
obtaining a lower deflection limit y of a target catwalk0Will be down-warp limit y0Inputting a pushing device; installing a displacement sensor 6 at the midspan position of the catwalk bearing rope 1; the displacement sensor 6 acquires a downwarping value y of the target catwalk and transmits the downwarping value y to the pushing device; comparison lower deflection limit y of pushing device0And a down-warp value y, if y > y0If the catwalk sag adjusting rope 2 is pulled, the connecting device 16 is used for lifting the rope strand former 3, the target catwalk is unloaded, and finally the deflection value y =0 is restored to the initial state; keeping the downward deflection value y =0 of the target catwalk, and maintaining the pushing device and the bearing beam 15 in the current state; and cycling until all strands 10 are spun.
The working principle of the catwalk sag adjusting system for erecting the main cable by adopting the air spinning method is as follows:
spinning each cable strand according to the method, and recording the downwarping value of each cable strand as a downwarping value y according to the spinning sequence1Lower deflection value y2Lower deflection value y3… … exampleIf treat that first strand spinning accomplishes the back, need stretch-draw next strand 10 for strand 10 breaks away from strand former 3, at this moment, because catwalk sag adjustment rope 2 is in the tensioning state, catwalk can upwards warp to downwarping value y2At this time, the pushing device judges the value if y2If more than 0, the pushing device is controlled to move back to the initial position, at the moment, the catwalk sag adjusting rope 2 is also slowly unloaded, and the catwalk sag is gradually recovered to the initial position (y)2=0）。
It should be noted that the sag of the catwalk is expressed as the sag of the catwalk load-bearing rope 1, so the sag value of the catwalk is represented by the sag value of the catwalk load-bearing rope 1, and the initial state sag value of each rope strand is 0.
Specifically, the catwalk beam 4 is perpendicular to the catwalk bearing rope 1, two catwalk sag adjustment ropes 2 are suspended above the catwalk bearing rope 1, the catwalk sag adjustment ropes 2 are anchored to the carrier beams 15, as shown in fig. 2, each carrier beam 15 is anchored with two threaded steel cables 11, a catwalk sag adjustment rope 2 (see fig. 2) is between the two threaded steel cables 11, when the displacement sensor 6 detects that the deflection value of the catwalk bearing rope 1 is greater than a preset value, the thrusters push the carrier beams 15, since the carrier beams 15 are anchored with the catwalk sag adjustment ropes 2, taking fig. 2 as an example, if the thrusters push the carrier beams 15 rightward, the carrier beams 15 drive the catwalk sag adjustment ropes 2 anchored therewith to move rightward, that is, two thrusters on the same bridge tower 5 are pushed in the same direction (simultaneously leftward or rightward), and thrusters on different bridge towers 5, then respectively jack into the left or respectively jack into the right (see fig. 1), the figure takes fig. 1 as an example, two thrusters of the left bridge tower 5 jack into the left at the same time, and two thrusters of the right bridge tower 5 jack into the right at the same time, so the catwalk sag adjusting rope 2 is tensioned, and because the catwalk sag adjusting rope 2 passes through the connecting device 16, the connecting device 16 is located between the catwalk forming device 3 and the catwalk beam 4, the catwalk sag adjusting rope 2 also lifts the catwalk forming device 3 while being tensioned, the catwalk forming device 3 drives the catwalk bearing rope 1 to lift, so the catwalk is unloaded.
It is worth mentioning that, as shown in fig. 2, taking the right bridge tower 5 as an example, two threaded steel cables 11 are suspended from the bridge tower 5, one end of each threaded steel cable 11 is hinged in an embedded part at the top of the bridge tower 5, the other end is a free end, and a pushing device is installed at the free end in a penetrating manner.
The catwalk is a linear temporary construction sidewalk which is erected below a main cable and parallel to the main cable during construction of a suspension bridge, is an overhead scaffold for construction work of constructors, is a construction platform for a main cable system and even the whole upper structure of the suspension bridge, and comprises a catwalk bearing cable 1 and a catwalk cross beam 4 for convenience of explanation, wherein a displacement sensor 6 is arranged at a midspan position of the catwalk bearing cable 1, and the displacement sensor 6 is used for monitoring and acquiring displacement, namely a downwarping value, of the catwalk bearing cable 1, in other words, the downwarping value of the catwalk is monitored by the displacement sensor 6; the strand former 3 is a structure for spinning and forming strands, belongs to the existing structure, and is not described in detail herein; and connecting device 16's effect supplies catwalk sag adjustment rope 2 to pass, and when catwalk sag adjustment rope 2 received stretch-draw, drives 3 lifts of strand former through connecting device 16, and 3 connections of strand former are on catwalk crossbeam 4, further drive the catwalk lifting.
This embodiment passes through displacement sensor automatic monitoring catwalk downwarping value to directly transmit this value to thrustor, thrustor can differentiate this downwarping value y and set for downwarping limit value y0If y > y0The jacking device can adjust the sag of the catwalk through the tensioning catwalk sag adjusting rope, so that the forming precision of the main cable is controlled, the whole process is simple, the jacking device is convenient and automatic, and the system has high practical significance and research value.
The second embodiment:
the embodiment relates to a catwalk sag adjustment system for erecting a main cable by adopting an air spinning method, and the catwalk sag adjustment system comprises two catwalk bearing cables 1 erected between two pylons 5, wherein a plurality of catwalk cross beams 4 are uniformly distributed at intervals in the length direction of the two catwalk bearing cables 1, each catwalk cross beam 4 is provided with a cable strand former 3, each pylon 5 is hung with at least two threaded steel cables 11, one end of each threaded steel cable 11 is hinged in a tower top embedded part of the pylon 5, the other end of each threaded steel cable is a free end, a pushing device is penetratingly arranged at the free end, and the pushing device is electrically connected with a displacement sensor 6 distributed at the midspan position of the catwalk bearing cable 1;
a bearing beam 15 is arranged between two threaded steel cables 11 on each bridge tower 5 in a spanning mode, the bearing beams 15 are abutted to pushing devices on the threaded steel cables 11, a pair of catwalk sag adjusting ropes 2 are erected between the two bearing beams 15, the catwalk sag adjusting ropes 2 are installed on a connecting device 16 in a penetrating mode, and the connecting device 16 is located between the strand former 3 and the catwalk cross beam 4.
As shown in fig. 2, the pushing device includes a fastening member 14, a reaction plate 13 and a piercing jack 7 sequentially penetrating along the length direction of the threaded steel cable 11, wherein the fastening member 14 is screwed and abutted to one plate surface of the reaction plate 13 through the threaded steel cable 11, the other plate surface of the reaction plate 13 is abutted to the bottom end plate of the piercing jack 7, and the piston head of the piercing jack 7 is abutted to the bearing beam 15;
the fastener 14 is used for fixing the reaction plate 13, preferably a nut in the embodiment, the nut is screwed on the threaded steel cable 11 and abuts against the left plate surface (taking fig. 1 as an example) of the reaction plate 13, the reaction plate 13 is used for providing a reverse acting force for the pushing of the center-penetrating jack 7, the right plate surface of the reaction plate 13 abuts against the bottom end plate of the center-penetrating jack 7, and the piston head of the center-penetrating jack 7 abuts against the bearing beam 15 so as to push the bearing beam 15.
The pushing device further comprises an oil pressure pump station 8 and an oil pressure controller 9, the center-penetrating jack 7 is communicated with the oil pressure pump station 8 through an oil way, the oil pressure pump station 8 is electrically connected with the oil pressure controller 9, the oil pressure controller 9 is in communication connection with the displacement sensor 6, and if the communication connection exists, the communication connection is wired or wireless, the purpose of the communication connection is to transmit data, and the specific form is not limited.
Specifically, referring to fig. 4, the displacement sensor 6 acquires the down-deflection value y of the catwalk and transmits the down-deflection value y to the oil pressure controller 9, and the oil pressure controller 9 compares the down-deflection value y0And a down-warp value y, if y > y0Then the oil pressure controller 9 controls the oil pressure pump station 8 to work, the oil pressure pump station 8 supplies the hydraulic oil to the penetrating jack 7, the penetrating jack 7 pushes the bearing beam 15, the bearing beam 15 drives the catwalk verticality adjusting rope 2, and the catwalk verticality adjusting rope 2 is obtainedAnd (3) tensioning, lifting the strand former 3 through the connecting device 16, unloading the target catwalk, and finally recovering to the initial state deflection value y = 0.
The oil pressure pump station 8 and the oil pressure controller 9 are structures matched with the penetrating jack 7, wherein the oil pressure pump station 8 is used for supplying oil to the penetrating jack 7, and the oil pressure controller 9 is used for judging the difference value between the preset downwarping value and the real downwarping value so as to control the oil pressure (the piston head extends out or retracts back) of the penetrating jack 7.
In main push-towing rope spinning in-process, the steel wire can fall in strand former 3 and form a strand 10 gradually, strand former 3 can give the catwalk steel wire weight direct transfer, along with the increase of steel wire quantity, the catwalk can progressively warp down, refer to specifically figure 3, 3 anchors of strand former in catwalk crossbeam 4, both arrange from top to bottom and vacuole formation between the two, place connecting device 16 in the cavity, connecting device 16 includes two parallels and relative risers that link to each other through the bolt, two cavitys about the clearance between the two risers divide into, wherein go up the internal V type recess wheel that is equipped with through bolt and can wind the bolt rotation of going up, lower cavity supplies catwalk sag adjustment rope 2 to pass.
Can find out, the top butt of two risers is in strand former 3, the bottom butt of two risers is in catwalk crossbeam 4, the V type recess and the contact of catwalk sag adjustment rope 2 of V type recess wheel, when catwalk sag adjustment rope 2 receives the promotion of load beam 15, catwalk sag adjustment rope 2 extrusion V type recess wheel, catwalk sag adjustment rope 2 will receive stretch-draw force transmission to V type recess wheel, V type recess wheel transmits for strand former 3, and strand former 3 connects in catwalk crossbeam 4, consequently, the catwalk is also lifted, the catwalk uninstallation, the downwarp value diminishes.
Specifically, two risers are through two at least bolted connection of laying and being parallel to each other from top to bottom, and every bolt is the equal perpendicular to riser face, and wherein the bolt can be rotatory around the bolt under the extrusion of catwalk sag adjustment rope 2 to the upper bolt is located to V type recess wheel cover, and catwalk sag adjustment rope 2 is located the V type recess of V type recess wheel and the space between the bolt down.
It should be noted that, connecting device 16 can be fixed between strand former 3 and catwalk crossbeam 4, also can detachably connect between strand former 3 and catwalk crossbeam 4, or the butt is between strand former 3 and catwalk crossbeam 4, and specific form does not do the restriction, and its final purpose can reach when catwalk sag adjustment rope 2 receives stretch-draw, connecting device 16 can drive the lifting of strand former 3 can.
As shown in fig. 1, in order to ensure that the catwalk sag adjustment rope 2 is subjected to a uniform tension force, two threaded steel cables 11 are hung on each bridge tower 5, each threaded steel cable 11 is provided with a pushing device in a penetrating manner, the pushing devices are abutted to the nearby bearing beam 15, referring to fig. 1, the pushing device on the left side is close to the bridge tower 5 on the left side, the pushing device on the right side is close to the bridge tower 5 on the right side, and the number of the pushing devices is 4.
In order to ensure reliable anchoring between the catwalk sag adjusting rope 2 and the bearing beam 15, preferably, the catwalk sag adjusting rope 2 is anchored to the bearing beam 15 through a steel wire rope clamp 12, the bearing beam 15 is made of section steel, and the catwalk sag adjusting rope 2 is a steel wire rope with the diameter phi of 36 mm.
The third embodiment:
the embodiment provides a catwalk sag adjustment method for erecting a main cable by adopting an air spinning method, which at least comprises a catwalk sag adjustment system for erecting a main cable by adopting an air spinning method, and comprises the following steps:
s001, acquiring lower deflection limit value y of target catwalk0Lower deflection limit y0Inputting each pushing device;
s002, mounting the displacement sensor 6 at the midspan position of the catwalk bearing rope 1 of the target catwalk;
s003, a displacement sensor 6 acquires a downwarping value y of the catwalk bearing cable 1, wherein the downwarping value y is the downwarping value y of the target catwalk, and the downwarping value y of the target catwalk is transmitted to each pushing device;
s004. each pushing device compares the lower deflection limit value y0And a down-warp value y, if y > y0Then each pushing device pushes a corresponding bearing beam 15, the bearing beams 15 drive the catwalk sag adjustment ropes 2 to approach to the bridge tower 5 on the same side, the catwalk sag adjustment ropes 2 are tensioned, meanwhile, the connecting devices 16 lift the rope strand formers 3, the target catwalk is unloaded,finally, the down-deflection value y =0 is recovered to the initial state;
s005, keeping the downwarping value y =0 of the target catwalk, and maintaining the pushing device and the bearing beam 15 in the current state;
and S006, circulating S003 to S005 until all the strand 10 spinning is finished.
The catwalk sag adjustment system for erecting the main cable by adopting the air spinning method comprises two catwalk bearing cables 1 erected between two pylons 5, a plurality of catwalk cross beams 4 are uniformly distributed along the length direction of the two catwalk bearing cables 1 at intervals, a cable strand former 3 is mounted on each catwalk cross beam 4, at least two threaded steel cables 11 are hung on each pylon 5, one end of each threaded steel cable 11 is hinged in a tower top embedded part of the corresponding pylon 5, the other end of each threaded steel cable is a free end, a pushing device is mounted at the free end in a penetrating mode, and the pushing device is electrically connected to a displacement sensor 6 distributed at the midspan position of the catwalk bearing cable 1; a bearing beam 15 is arranged between two threaded steel cables 11 on each bridge tower 5 in a spanning mode, the bearing beams 15 are abutted to pushing devices on the threaded steel cables 11, a pair of catwalk sag adjusting ropes 2 are erected between the two bearing beams 15, the catwalk sag adjusting ropes 2 are installed on a connecting device 16 in a penetrating mode, and the connecting device 16 is located between the strand former 3 and the catwalk cross beam 4.
Catwalk sag adjustment rope 2 sets up in the below of strand former 3, and strand former 3 is connected on catwalk crossbeam 4, and catwalk crossbeam 4 is connected on catwalk bearing cable 1, through stretch-draw catwalk sag adjustment rope 2 for 3 lifts of strand former, thereby make the uninstallation of catwalk bearing cable, resume to initial condition at last, thereby guarantee the homogeneity of different layers of steel wire stress in the same strand, finally guarantee the shaping quality of main push-towing rope.
Fourth embodiment:
the embodiment provides a catwalk sag adjustment method for erecting a main cable by adopting an air spinning method, which comprises the following steps:
step one, acquiring a lower deflection limit value y of a target catwalk0Will be down-warp limit y0An input oil pressure controller 9;
secondly, mounting a displacement sensor 6 at the midspan position of a catwalk bearing rope 1 of the target catwalk;
thirdly, the displacement sensor 6 acquires a downwarping value y of the catwalk bearing cable 1, wherein the downwarping value y is the downwarping value y of the target catwalk, and the downwarping value y of the target catwalk is transmitted to the oil pressure controller 9;
step four, the oil pressure controller 9 compares the lower deflection limit value y0And a down-warp value y, if y > y0If the catwalk verticality adjusting device is in the normal state, the oil pressure controller 9 controls the oil pressure pump station 8 to work, the oil pressure pump station 8 supplies hydraulic oil to the penetrating jack 7, the penetrating jack 7 pushes the corresponding bearing beam 15, the bearing beam 15 drives the catwalk verticality adjusting rope 2 to approach to the bridge tower 5 on the same side, the catwalk verticality adjusting rope 2 is tensioned, the cable strand former 3 is lifted through the connecting device 16, the target catwalk is unloaded, and finally the target catwalk is restored to the downwarp value y =0 in the initial state;
step five, keeping the downwarping value y =0 of the target catwalk, and keeping the pushing device and the bearing beam 15 in a current state;
and step six, the step three to the step five are circulated until all the strand 10 spinning is completed.
The catwalk verticality adjusting method for erecting the main cable by adopting the air spinning method at least comprises a catwalk verticality adjusting system for erecting the main cable by adopting the air spinning method, the catwalk verticality adjusting system for erecting the main cable by adopting the air spinning method comprises two catwalk bearing cables 1 erected between two pylons 5, a plurality of catwalk cross beams 4 are uniformly distributed at intervals along the length direction of the two catwalk bearing cables 1, a cable strand former 3 is installed on each catwalk cross beam 4, at least two threaded steel cables 11 are hung on each pylon 5, one end of each threaded steel cable 11 is hinged in a tower top embedded part of the corresponding pylon 5, the other end of each threaded steel cable is a free end, a pushing device is installed at the free end in a penetrating manner, and the pushing device is electrically connected with a displacement sensor 6 arranged at the midspan position of the catwalk bearing cable 1; a bearing beam 15 is arranged between two threaded steel cables 11 on each bridge tower 5 in a spanning mode, the bearing beams 15 are mutually abutted to pushing devices on the threaded steel cables 11, a pair of catwalk sag adjusting ropes 2 is erected between the two bearing beams 15, the catwalk sag adjusting ropes 2 are installed on a connecting device 16 in a penetrating mode, and the connecting device 16 is located between the cable strand former 3 and the catwalk cross beam 4.
The pushing device comprises a fastener 14, a reaction plate 13 and a piercing jack 7 which sequentially penetrate along the length direction of the threaded steel cable 11, wherein the fastener 14 is screwed and abutted to one plate surface of the reaction plate 13 through the threaded steel cable 11, the other plate surface of the reaction plate 13 is abutted to the bottom end plate of the piercing jack 7, and the piston head of the piercing jack 7 is abutted to the bearing beam 15;
the pushing device further comprises an oil pressure pump station 8 and an oil pressure controller 9, the center penetrating jack 7 is communicated with the oil pressure pump station 8 through an oil way, the oil pressure pump station 8 is electrically connected with the oil pressure controller 9, and the oil pressure controller 9 is in communication connection with the displacement sensor 6.
The anchor of strand former 3 is in catwalk crossbeam 4, and both arrange from top to bottom and between the two vacuole formation, place connecting device 16 in the cavity, and connecting device 16 includes two parallels and relative risers that link to each other through the bolt, and two cavitys about the clearance between two risers divide into, wherein go up the internal through bolt that is equipped with of cavity and can wind the rotatory V type recess wheel of bolt, and lower cavity supplies catwalk sag adjustment rope 2 to pass.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (7)
1. Adopt catwalk sag adjustment system of aerial spinning method frame main push-towing rope, it is including setting up twice catwalk bearing cable (1) between two pylons (5), follows twice the even interval in length direction of catwalk bearing cable (1) is laid and is equipped with a plurality of catwalk crossbeams (4), installs strand former (3), its characterized in that on every catwalk crossbeam (4): at least two threaded steel cables (11) are hung on each bridge tower (5), wherein one end of each threaded steel cable (11) is hinged in a tower top embedded part of the bridge tower (5) where the threaded steel cable is located, the other end of each threaded steel cable is a free end, a pushing device penetrates through the free end and is installed, and the pushing device is electrically connected to a displacement sensor (6) arranged in the midspan position of the catwalk bearing cable (1);
a bearing beam (15) is arranged between two threaded steel cables (11) on each bridge tower (5) in a spanning mode, the bearing beam (15) is abutted to a pushing device on the threaded steel cables (11), a pair of catwalk sag adjusting ropes (2) is erected between the two bearing beams (15), the catwalk sag adjusting ropes (2) are installed on a connecting device (16) in a penetrating mode, the connecting device (16) is located between a strand former (3) and a catwalk cross beam (4), the strand former (3) is anchored to the catwalk cross beam (4), the strand former and the catwalk cross beam are arranged up and down, a cavity is formed between the strand former and the catwalk cross beam, and the connecting device (16) is placed in the cavity;
the pushing device comprises a fastener (14), a reaction plate (13) and a piercing jack (7) which sequentially penetrate along the length direction of the threaded steel cable (11), wherein the fastener (14) is screwed and abutted to one plate surface of the reaction plate (13) through the threaded steel cable (11), the other plate surface of the reaction plate (13) is abutted to a bottom end plate of the piercing jack (7), and a piston head of the piercing jack (7) is abutted to a bearing beam (15);
the pushing device further comprises an oil pressure pump station (8) and an oil pressure controller (9), the center penetrating jack (7) is communicated with the oil pressure pump station (8) through an oil way, the oil pressure pump station (8) is electrically connected with the oil pressure controller (9), and the oil pressure controller (9) is in communication connection with the displacement sensor (6).
2. The catwalk sag adjustment system for erecting a main cable by an air spinning method according to claim 1, comprising: the connecting device (16) comprises two parallel and opposite vertical plates connected through bolts, a gap between the two vertical plates is divided into an upper cavity and a lower cavity, a V-shaped groove wheel is erected in the upper cavity, and the lower cavity is used for the vertical adjustment rope (2) of the catwalk to pass through.
3. The catwalk sag adjustment system for erecting a main cable by an air spinning method according to claim 2, wherein: the two vertical plates are connected through at least two bolts which are arranged up and down and are parallel to each other, each bolt is perpendicular to the plate surface of each vertical plate, the upper bolts are sleeved with the V-shaped groove wheels and rotate around the upper bolts under the extrusion of the catwalk verticality adjusting ropes (2), and the catwalk verticality adjusting ropes (2) are located in the space between the V-shaped grooves of the V-shaped groove wheels and the lower bolts.
4. The catwalk sag adjustment system for erecting a main cable by an air spinning method according to claim 1, wherein: the catwalk verticality adjusting rope (2) is anchored on the bearing beam (15) through a steel wire rope clamping device (12).
5. The catwalk sag adjustment system for erecting a main cable by an air spinning method according to claim 1, comprising: the bearing beam (15) is made of section steel, and the catwalk verticality adjusting rope (2) is a steel wire rope with the diameter phi of 36 mm.
6. A catwalk sag adjustment method for erecting a main cable by using an air spinning method, at least comprising the catwalk sag adjustment system for erecting a main cable by using an air spinning method according to any one of claims 1 to 5, the method comprising the steps of:
s001, acquiring lower deflection limit value y of target catwalk0Will be down-warp limit y0Inputting each pushing device;
s002, mounting the displacement sensor (6) at the midspan position of the catwalk bearing rope (1) of the target catwalk;
s003, a displacement sensor (6) acquires a downwarping value y of the catwalk bearing cable (1), wherein the downwarping value y is the downwarping value y of the target catwalk, and the downwarping value y of the target catwalk is transmitted to each pushing device;
s004. each pushing device compares the lower deflection limit value y0And a down-warp value y, if y > y0Each pushing device pushes a corresponding bearing beam (15), the bearing beams (15) drive the catwalk sag adjusting ropes (2) to approach to the bridge tower (5) on the same side, the catwalk sag adjusting ropes (2) are tensioned, meanwhile, the connecting device (16) lifts the rope strand former (3), the target catwalk is unloaded, and finally the downwarp value y =0 is recovered to the initial state;
s005, keeping the downwarping value y =0 of the target catwalk, and maintaining the pushing device and the bearing beam (15) in a current state;
and S006, circulating S003-S005 until all the strands (10) are spun.
7. The catwalk sag adjustment method for erecting a main cable by using an air spinning method according to claim 6, comprising the following steps:
step one, acquiring a lower deflection limit value y of a target catwalk0Will be down-warp limit y0An input oil pressure controller (9);
secondly, mounting a displacement sensor (6) at the midspan position of a catwalk bearing rope (1) of the target catwalk;
thirdly, a displacement sensor (6) acquires a downwarping value y of the catwalk bearing rope (1), wherein the downwarping value y is the downwarping value y of the target catwalk, and the downwarping value y of the target catwalk is transmitted to an oil pressure controller (9);
step four, the oil pressure controller (9) compares the lower deflection limit value y0And a down-warp value y, if y > y0If the hydraulic controller (9) controls the hydraulic pump station (8) to work, the hydraulic pump station (8) supplies hydraulic oil to the through jack (7), the through jack (7) pushes the corresponding bearing beam (15), the bearing beam (15) drives the catwalk verticality adjusting rope (2) to approach to the bridge tower (5) on the same side, the catwalk verticality adjusting rope (2) is tensioned, the cable strand former (3) is lifted through the connecting device (16), the target catwalk is unloaded, and finally the downwarp value y =0 in the initial state is recovered;
step five, keeping the downwarping value y =0 of the target catwalk, and maintaining the pushing device and the bearing beam (15) in a current state;
and step six, the step three to the step five are circulated until all the strand (10) spinning is finished.
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| CN114575245B (en) * | 2022-03-07 | 2023-01-13 | 四川公路桥梁建设集团有限公司 | Construction method of spatial main cable suspension bridge handrail rope |
| CN115162200A (en) * | 2022-08-23 | 2022-10-11 | 广东湾区交通建设投资有限公司 | Suspension bridge main cable strand erection and position restraining method |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6429506A (en) * | 1987-07-24 | 1989-01-31 | Ishikawajima Harima Heavy Ind | Method of adjusting catwalk at time of erection of suspension bridge cable through method of air spinning construction |
| CN101177931A (en) * | 2007-12-05 | 2008-05-14 | 中铁大桥局股份有限公司 | Erection of gantry type small-cycle traction system on large-span suspension bridge main cable |
| CN201358439Y (en) * | 2009-02-18 | 2009-12-09 | 路桥集团国际建设股份有限公司 | Catwalk anchorage adjusting device |
| CN104631329A (en) * | 2014-12-30 | 2015-05-20 | 中铁大桥局集团有限公司 | Method for adjusting overall line shape of continuous catwalk of suspension bridge |
| CN105155427A (en) * | 2015-10-22 | 2015-12-16 | 江苏法尔胜缆索有限公司 | Construction method for laying suspension bridge catwalk |
| CN105603879A (en) * | 2015-12-29 | 2016-05-25 | 四川石油天然气建设工程有限责任公司 | Construction technology for large-diameter pipeline crossing construction catwalk |
| CN105780658A (en) * | 2016-03-11 | 2016-07-20 | 中国建筑第六工程局有限公司 | Transverse opposite pulling method for space cable plane structure cable system |
| CN105910743A (en) * | 2016-05-05 | 2016-08-31 | 郑州大学 | Method for measuring tension of cable stayed bridge stay cable by using unmanned plane |
| CN107447665A (en) * | 2017-08-16 | 2017-12-08 | 中国十七冶集团有限公司 | A kind of laying method of self-anchored suspension bridge construction cat road carrying rope |
| CN107587429A (en) * | 2017-08-04 | 2018-01-16 | 东南大学 | Cord clip of suspension bridge installation site modification method |
| CN109137741A (en) * | 2018-09-20 | 2019-01-04 | 广东省长大公路工程有限公司 | A kind of automatic control system and monitor supervision platform of suspension bridge strand trailer system |
| CN109632122A (en) * | 2018-09-20 | 2019-04-16 | 广东省长大公路工程有限公司 | Suspension bridge strand temperature automatic measurement system and Internet of Things measurement and control of temperature platform including it |
| CN109989351A (en) * | 2019-04-24 | 2019-07-09 | 中交第二公路工程局有限公司 | A kind of self-anchored suspension bridge Datum Strand linear control method |
| CN110761196A (en) * | 2019-11-06 | 2020-02-07 | 中国葛洲坝集团第二工程有限公司 | Adjustable catwalk anchoring and connecting device |
| CN110823404A (en) * | 2019-11-29 | 2020-02-21 | 武汉智汇高桥科技股份有限公司 | Intelligent monitoring system for suspension bridge construction |
| CN111424548A (en) * | 2020-04-07 | 2020-07-17 | 中交二公局第二工程有限公司 | Suspension bridge main cable strand forming device and construction method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211368400U (en) * | 2019-08-16 | 2020-08-28 | 江苏法尔胜缆索有限公司 | Steel wire pay-off machine for large-span suspension bridge through air spinning method |
| CN211006385U (en) * | 2019-08-23 | 2020-07-14 | 中交二公局第二工程有限公司 | Angle swing mechanism and AS construction method spinning structure with angle swing mechanism |
-
2020
- 2020-09-15 CN CN202010966834.3A patent/CN112195784B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6429506A (en) * | 1987-07-24 | 1989-01-31 | Ishikawajima Harima Heavy Ind | Method of adjusting catwalk at time of erection of suspension bridge cable through method of air spinning construction |
| CN101177931A (en) * | 2007-12-05 | 2008-05-14 | 中铁大桥局股份有限公司 | Erection of gantry type small-cycle traction system on large-span suspension bridge main cable |
| CN201358439Y (en) * | 2009-02-18 | 2009-12-09 | 路桥集团国际建设股份有限公司 | Catwalk anchorage adjusting device |
| CN104631329A (en) * | 2014-12-30 | 2015-05-20 | 中铁大桥局集团有限公司 | Method for adjusting overall line shape of continuous catwalk of suspension bridge |
| CN105155427A (en) * | 2015-10-22 | 2015-12-16 | 江苏法尔胜缆索有限公司 | Construction method for laying suspension bridge catwalk |
| CN105603879A (en) * | 2015-12-29 | 2016-05-25 | 四川石油天然气建设工程有限责任公司 | Construction technology for large-diameter pipeline crossing construction catwalk |
| CN105780658A (en) * | 2016-03-11 | 2016-07-20 | 中国建筑第六工程局有限公司 | Transverse opposite pulling method for space cable plane structure cable system |
| CN105910743A (en) * | 2016-05-05 | 2016-08-31 | 郑州大学 | Method for measuring tension of cable stayed bridge stay cable by using unmanned plane |
| CN107587429A (en) * | 2017-08-04 | 2018-01-16 | 东南大学 | Cord clip of suspension bridge installation site modification method |
| CN107447665A (en) * | 2017-08-16 | 2017-12-08 | 中国十七冶集团有限公司 | A kind of laying method of self-anchored suspension bridge construction cat road carrying rope |
| CN109137741A (en) * | 2018-09-20 | 2019-01-04 | 广东省长大公路工程有限公司 | A kind of automatic control system and monitor supervision platform of suspension bridge strand trailer system |
| CN109632122A (en) * | 2018-09-20 | 2019-04-16 | 广东省长大公路工程有限公司 | Suspension bridge strand temperature automatic measurement system and Internet of Things measurement and control of temperature platform including it |
| CN109989351A (en) * | 2019-04-24 | 2019-07-09 | 中交第二公路工程局有限公司 | A kind of self-anchored suspension bridge Datum Strand linear control method |
| CN110761196A (en) * | 2019-11-06 | 2020-02-07 | 中国葛洲坝集团第二工程有限公司 | Adjustable catwalk anchoring and connecting device |
| CN110823404A (en) * | 2019-11-29 | 2020-02-21 | 武汉智汇高桥科技股份有限公司 | Intelligent monitoring system for suspension bridge construction |
| CN111424548A (en) * | 2020-04-07 | 2020-07-17 | 中交二公局第二工程有限公司 | Suspension bridge main cable strand forming device and construction method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 悬索桥主缆空中纺线工法技术经济性分析;葛国库;《公路》;20170325;第296-301页 * |
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