CN116180624A - Spliced special-shaped suspender module replacing device and replacing method - Google Patents

Abstract

The invention belongs to the technical field of bridge engineering, and particularly relates to a device and a method for replacing an assembled special-shaped suspender module. The invention belongs to the technical field of bridge engineering, and particularly relates to a device and a method for replacing an assembled special-shaped suspender module. The invention comprises an assembled hoop which is matched with the cross section shape of the arch rib, the top end of the temporary sling is fixed at the upper positioning point of the assembled hoop through a universal joint module in an angle-adjustable way, the bottom end of the temporary sling is fixed on a lower hanging beam, the temporary sling is tensioned through a compensating jack, and a bridge deck system cross beam is placed above the lower hanging beam. The invention can solve the problem of difficult temporary sling angle adjustment caused by changeable angle of the suspender of the special-shaped arch bridge, and can flexibly adjust the size of the anchor ear according to the section change of the arch rib when in turnover use, thereby reducing the cost and difficulty of replacing the suspender module at the arch rib with variable section, saving the construction time, the number of manpower and equipment and effectively shortening the construction time.

Description

Spliced special-shaped suspender module replacing device and replacing method

Technical Field

The invention belongs to the technical field of bridge engineering, and particularly relates to a device and a method for replacing an assembled special-shaped suspender module.

Background

The suspender is used as a main bearing member of the arch bridge and is limited by various reasons such as material characteristics, processing technology, construction quality, operation maintenance and the like, and the actual service life is approximately between 12 and 18 years; therefore, there is a need to replace the boom multiple times during the life of the bridge. The urban landscape bridge not only has the function of beautifying the city, but also often bears larger traffic flow, the time of boom replacement operation can influence the normal running of the city traffic, how to shorten the time required by boom replacement and reduce the influence of boom module replacement on the urban traffic, and the urban landscape bridge is worthy of intensive study. The complicated arch rib design of urban landscape bridge lets traditional jib change device installation degree of difficulty increase on the one hand, and on the other hand lets jib angle gesture be rich in the change again, has further improved the installation of jib module and has changed the degree of difficulty, also makes the arch bridge appear stress relaxation more easily in the use, problem such as stress distribution inequality. If the current suspender module is changed and mainly uses interim suspender or interim pocket hoisting device, but the interim hoist cable of current suspender changing device hardly carries out angle adjustment, also is not applicable to the variable cross section arch rib that special-shaped arch bridge used often simultaneously, and the staple bolt of customization often can not have enough to meet the need and use, has caused the waste of material, has that the suitability is poor, large-scale lifting equipment table work consumption is big, construction cost is higher problem to and the process is more, the operation progress is slow, influence the normal transit time of traffic long problem. In view of the fact that frequent replacement of the hanger rod inevitably consumes considerable cost, the bearing performance of the hanger rod is ensured in the use process, optimization of cable force is achieved, the necessity of replacing the hanger rod due to the problems of stress relaxation, uneven stress distribution and the like is avoided, the service life of the hanger rod and the normal working period are prolonged, and the hanger rod is obviously an important way for reducing the maintenance cost of an arch bridge. Therefore, a solution is needed.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides an assembled special-shaped suspender module replacing device which can solve the problem of difficult temporary sling angle adjustment caused by changeable angle of a suspender of a special-shaped arch bridge, and meanwhile, the size of a hoop can be flexibly adjusted according to the section change of an arch rib during turnover use, so that the cost and difficulty of suspender module replacement at the arch rib with a variable section are reduced, the construction time, the number of manpower and equipment are saved, and the time required by construction can be effectively shortened.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

an assembled special-shaped suspender module replacing device is characterized in that: the device comprises an assembled anchor ear matched with the cross section shape of an arch rib, wherein the top end of a temporary sling is fixed at an upper positioning point of the assembled anchor ear through a universal joint module in an angle-adjustable way, the bottom end of the temporary sling is fixed on a lower hanging beam, the tension of the temporary sling is realized through a compensation jack, and a bridge deck cross beam is placed above the lower hanging beam;

the spliced anchor ear comprises corner end sliding blocks positioned at four corner ends, wherein the left upper corner end sliding block and the right upper corner end sliding block are mutually fixed through upper-layer split bolts, and the left lower corner end sliding block and the right lower corner end sliding block are mutually fixed through lower-layer split bolts; two ends of the left hinging rod are respectively hinged with the left upper corner end sliding block and the left lower corner end sliding block, and two ends of the right hinging rod are respectively hinged with the right upper corner end sliding block and the right lower corner end sliding block; the upper layer split bolt, the lower layer split bolt, the left hinging rod and the right hinging rod are provided with positioning plates for being attached to corresponding surfaces of the arch ribs.

Preferably, the upper layer split bolt, the lower layer split bolt, the left hinging rod, the right hinging rod and the corner end sliding blocks at four corner ends which are matched with each other are used as a group of positioning units, and the two groups of positioning units are connected with each other through the positioning rods arranged along the length direction of the arch rib; a rotary drum is respectively and rotatably matched on the positioning rods between the two groups of upper right corner end sliding blocks and between the two groups of upper left corner end sliding blocks, a mounting hole is radially formed in the rotary drum in a penetrating mode, the top end of the temporary sling is hinged in the mounting hole through a horizontal hinge shaft, and the axis of the horizontal hinge shaft is perpendicular to the axis direction of the rotary drum; the rotary drum and the horizontal hinge shaft are combined to form the universal joint module.

Preferably, one side of the positioning plate facing the arch rib surface is provided with an anti-slip wear-resistant layer.

Preferably, the two groups of spliced hoops are sequentially arranged along the length direction of the arch rib, and temporary slings at the two groups of spliced hoops extend downwards to be respectively fixed at two ends of the lower hanging beam, so that the lower hanging beam forms a bearing platform of the bridge deck system cross beam; the top end of the suspender module is fixed on the arch rib through an upper suspension point, the bottom end of the suspender module is fixed on a bridge deck system beam through a lower suspension point, and a tensioning jack for providing tensioning force of the suspender module is arranged at the bridge deck system beam; and a cable sensor for testing cable force at the boom module is also arranged on the boom module.

Preferably, the boom module comprises a middle boom, the top end of the middle boom is hinged at the upper lifting point, the bottom end of the middle boom is sleeved with a connecting block, and lifting hooks are symmetrically arranged on two sides of the connecting block, so that hooking cooperation is formed between the two symmetrically arranged lifting rings at the lower lifting point respectively, and further the connecting block is limited to do upward movement relative to the lower lifting point; an external thread section is arranged on a section of the rod body of the middle suspender, which extends out of the connecting block, and a fastening nut is in threaded fit with the external thread section, so that the middle suspender is limited to move upwards relative to the connecting block; the cable sensor is arranged on the intermediate boom.

Preferably, the lower suspension point comprises a lower lug plate directly fixed on a bridge deck system beam, the bottom of the lower pull rod is hinged on the lower lug plate, and the top of the lower pull rod is provided with the suspension ring; the number of the lower pull rods is two, and the lower pull rods are symmetrically arranged along the axis of the middle suspender.

Preferably, the lower ear plate comprises a bottom plate and a vertical plate arranged on the bottom plate, and the vertical plate and the bottom plate are intersected with each other; the vertical plates form a hinged plate for hinging the lower pull rod, and the two plates are hinged with each other through a lower pin shaft.

Preferably, the upper hanging point comprises an upper lug plate directly fixed on the arch rib, the top end of the middle hanging rod is coaxially provided with a fork lug, and the fork lug and the upper lug plate are inserted into each other and hinged with each other through an upper pin shaft.

Preferably, when the intermediate boom is maintained, the cable force is adjusted by screwing the fastening nut, and the number of rotations required for fastening the nut is calculated by the following formula:

wherein:

n is the number of required rotation cycles of the fastening nut;

f is a cable force adjusting value, and is obtained by subtracting the reading of the current cable force sensor from the rated cable force value of the middle suspender;

l is the available section length of the intermediate boom;

p is the thread pitch of the external thread section at the middle suspender;

e is the elastic modulus of the middle suspender;

s is the cross-sectional area of the intermediate boom.

Preferably, the replacement method applies the replacement device of the assembled special-shaped suspender module, and is characterized by comprising the following steps:

s1, installing an assembled anchor ear on an arch rib of a position where a suspender module to be replaced is located, adjusting the assembled anchor ear to enable the shape of the assembled anchor ear to be matched with the section of the arch rib, and then connecting and fastening the assembled anchor ear through a split bolt;

s2, installing a lower hanging beam below a bridge deck system beam, then installing temporary slings, and adjusting the lengths of the temporary slings so as to tightly pocket the bridge deck system beam, thereby ensuring that each temporary sling is stressed uniformly;

s3, installing a compensation jack below the lower hanging beam, communicating the compensation jack with a hydraulic pump station through a hydraulic pipe, and checking the connection safety and the stable load holding capacity of each component;

s4, installing a static level gauge and a cable sensor around the boom module to be replaced and the adjacent boom module;

s5, cutting off steel wires of the original boom module step by step, controlling a compensation jack to synchronously stretch step by step, and adjusting elevation change values of all control points to be in a design requirement range so as to realize the conversion of the cable force of the original boom module to the position of the spliced special-shaped boom module replacing device;

s6, installing a new boom module, tensioning by using a tensioning jack, and controlling a compensation jack to retract a cylinder step by step to convert the cable force at the position of the spliced special-shaped boom module replacing device to the position of the new boom module, and anchoring the new boom module after tensioning in place;

s7, removing the spliced special-shaped suspender module replacing device, transferring to the position of the suspender module to be replaced next, and repeating the steps to complete replacement of other suspender modules.

The invention has the beneficial effects that:

1) The invention provides an assembled suspender replacing device suitable for a special-shaped arch bridge, which has the advantages of simple structure, reliable performance and convenient installation, realizes multidirectional flexible adjustment of a temporary suspender through a universal joint module capable of rotating in two directions, solves the problem of difficult adjustment of the angle of the temporary suspender caused by changeable suspender angle of the special-shaped arch bridge, reduces the construction difficulty of suspender replacement, saves the construction time, labor and equipment quantity, and reduces the construction cost of the suspender replacement of the arch bridge.

2) The adjustable assembled anti-slip anchor ear structure adopted by the invention has the advantages of simple structure, flexible arrangement, easy installation, safety and reliability, and the anchor ear can be flexibly adjusted according to the change of the cross section of the arch rib when in turnover use, thereby solving the problem that the traditional anchor ear structure is only suitable for the arch rib with equal cross section, and further, when the arch rib suspender with variable cross section is replaced, a plurality of anchor ears are required to be manufactured, the cost and the difficulty of replacing the arch rib suspender with variable cross section are reduced, and the time required for construction is shortened.

3) The assembled hoop provided by the invention is formed by assembling a plurality of components, the components are low in processing difficulty, simple and convenient to assemble and disassemble, easy to transport and store, and meanwhile, the assembled hoop can be compatible with the replacement of suspenders of arch bridges with various cross sections, has a wide application range, can be repeatedly used, saves materials, and reduces the maintenance cost of the arch bridges.

4) The invention adopts the cable sensor to carry out the force monitoring assistance and replacement of the boom module, can effectively reduce the error of the conventional boom force measurement method on the short boom force measurement, ensures the safety of the structure during the replacement of the boom module, and effectively avoids the possible safety problem during the replacement of the boom module.

5) On the basis of the structure, the replacement method provided by the invention can realize accurate displacement and force change control, and further realize smooth and continuous conversion of the internal forces of the new and old suspenders and the temporary bearing system for two times. According to the replacement method, when the suspender module is replaced, the hydraulic system can realize the quick replacement requirement of the suspender module in the traffic state of the bridge deck according to the cable sensor and through the corresponding jack for real-time pressure stabilizing compensation, so that the influence on traffic when the suspender module is replaced is reduced. Meanwhile, the replacing method can even synchronously replace a plurality of boom modules by a plurality of devices in parallel, further shorten the time required by replacing the boom modules and achieve remarkable effect.

6) The invention also discards the traditional suspender structure, and instead uses a novel suspender module convenient and detachable, on one hand, the suspender module adopts the detachable middle suspender, ensures the convenient and detachable property by the cooperation of the lifting hook and the lifting ring when in use, and further optimizes the suspender bearing structure by depending on the lower lifting points of symmetrical layout. Meanwhile, the problem that the replacement and maintenance of the common suspender are complicated is solved, the installation and the replacement of the middle suspender can be rapidly carried out, the influence of arch bridge maintenance on urban traffic is reduced, the replacement cost of the suspender module is reduced, and the novel suspension rod is suitable for arch bridges in various forms. On the other hand, the combined structure of the fastening nut and the connecting block is additionally arranged at the bottom end of the middle suspender, the connecting block is matched with the cable force sensor by the fastening nut while forming the assembly matrix of the suspension ring and the lifting hook, so that the real-time compensation of the tensile stress at the middle suspender is realized, the stress relaxation problem of the suspender module is prevented, and the normal service life of the suspender module can be ensured while the convenience of replacing the middle suspender is improved, and the use is flexible and convenient.

7) On the basis of the structure, the invention further provides an optimal control means of the cable force, which can simply and conveniently realize the optimal calculation of the cable force, is more suitable for on-site single person rapid operation, has lower threshold, can effectively ensure and even prolong the service life of the suspender module, and has remarkable effect.

Drawings

FIG. 1 is a diagram illustrating an operation state of one embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

fig. 3 and 4 are schematic perspective views of a split type anchor ear;

FIG. 5 is a schematic perspective view of a boom module;

FIGS. 6 and 7 are structural side views of two embodiments of a boom module;

FIG. 8 is a front view of a boom module;

FIG. 9 is a diagram showing the unhooked state of the hook and sling;

fig. 10 is an exploded view of the construction of the boom module.

The actual correspondence between each label and the component name of the invention is as follows:

a-arch rib; b-bridge deck system cross beams;

10-splicing type anchor ear; 11-upper left corner end sliding block; 12-upper right corner end sliding block; 13-lower left corner end sliding block; 14-a lower right corner end sliding block; 15-upper layer split bolts; 16-lower layer split bolts; 17-left hinge bar; 18-right hinge lever; 19-positioning plates;

20-temporary slings; 30-a gimbal module; 31-a drum; 32-a horizontal hinge shaft;

40-lower hanging beam; 50-compensating jack; 60-positioning rod;

70-a boom module; 71-lifting points; 71 a-upper ear plate; 71 b-upper pin shaft; 72-a lower hanging point; 72 a-hanging rings; 72 b-lower ear plate; 72 c-lower tie rod; 72 d-lower pin shaft; 73-an intermediate boom; 73 a-an external thread segment; 73 b-scale; 74-connecting blocks; 74 a-hooks; 75-tightening a nut; 76-cable sensor.

Detailed Description

For ease of understanding, the specific structure and operation of the present invention will be further described herein with reference to FIGS. 1-10:

the utility model provides a pin-connected panel dysmorphism arch bridge jib change device, includes adjustable and skid-proof pin-connected panel staple bolt 10, but two-way rotatory universal joint module 30, interim hoist cable 20, lower hanging beam 40, hydraulic jack and corresponding sensor. Wherein:

the adjustable assembly type anchor ear 10 comprises corner end sliding blocks positioned at four corner ends, wherein an upper left corner end sliding block 11 and an upper right corner end sliding block 12 are mutually fixed through an upper layer split bolt 15, and a lower left corner end sliding block 13 and a lower right corner end sliding block 14 are mutually fixed through a lower layer split bolt 16; the two ends of the left hinging rod 17 are respectively hinged with the left upper corner end sliding block 11 and the left lower corner end sliding block 13, and the two ends of the right hinging rod 18 are respectively hinged with the right upper corner end sliding block 12 and the right lower corner end sliding block 14. Meanwhile, as shown in fig. 3 to 4, the corner end sliding blocks of the upper layer split bolt 15, the lower layer split bolt 16, the left hinge rod 17, the right hinge rod 18 and the four corner ends, which are matched with each other, are one set of positioning units, which are two sets and are connected to each other by the positioning rods 60 arranged along the length direction of the arch rib a.

In addition, as shown in fig. 3-4, a rotary drum 31 is rotatably matched on a positioning rod 60 between two groups of upper left corner end sliding blocks 11, a mounting hole is radially penetrated and arranged at the rotary drum 31, the top end of the temporary sling 20 is hinged in the mounting hole through a horizontal hinge shaft 32, and the axis of the horizontal hinge shaft 32 is vertical to the axis direction of the rotary drum 31; the drum 31 and the horizontal hinge shaft 32 are combined to form the universal joint module 30.

For the anti-slip performance, the anti-slip wear-resistant layer can be arranged on the inner side of the positioning plate 19 while the positioning plate 19 for being attached to the corresponding surface of the arch rib A is arranged on the rod bodies of the upper-layer split bolt 15, the lower-layer split bolt 16, the left-side hinging rod 17 and the right-side hinging rod 18.

The hydraulic jack then comprises a compensating jack 50 for tensioning the temporary slings 20 and a tensioning jack for tensioning the boom modules 70. The lower hanging beam 40 is provided with a lower locating point of the temporary sling 20 and a mounting position of the compensating jack 50 is reserved.

The sensor comprises a static level for measuring the elevation change of the bridge deck and a cable force sensor 76 for monitoring the cable force of the boom module 70, wherein the cable force sensor 76 preferably adopts a magnetic flux sensor, and the signal output end of the sensor is in communication connection with the central controller.

When the hanger rod module 70 is actually replaced, the hanging flow comprises the following steps:

s1, installing an assembled hoop 10 on an arch rib A at the position of a suspender module 70 to be replaced, adjusting the assembled hoop 10 to enable the shape of the assembled hoop to be matched with the section of the arch rib A, and then connecting and fastening the assembled hoop through a split bolt;

s2, installing a lower hanging beam 40 below the bridge deck system beam B, then installing temporary slings 20, and adjusting the length of the temporary slings 20 so as to tightly pocket the bridge deck system beam B, thereby ensuring that each temporary sling 20 is uniformly stressed;

s3, installing a compensation jack below the lower hanging beam 40, communicating the compensation jack with a hydraulic pump station through a hydraulic pipe, and checking the connection safety and the stable load holding capacity of each component;

s4, installing a static level gauge and a cable sensor 76 on the boom module 70 to be replaced and the periphery of the adjacent boom module 70;

s5, cutting off steel wires of the original boom module 70 step by step, controlling the compensation jack 50 to synchronously stretch step by step, and adjusting elevation change values of all control points to be in a design requirement range so as to realize the conversion of the cable force of the original boom module 70 to a replacement device of the assembled special-shaped boom module 70;

s6, installing a new boom module 70, tensioning by using a tensioning jack, and controlling the compensation jack 50 to retract the cylinder step by step to convert the cable force at the replacement device of the assembled special-shaped boom module 70 to the new boom module 70, and anchoring the new boom module 70 after tensioning in place;

s7, removing the replacement device of the assembled special-shaped boom module 70, transferring to the next boom module 70 to be replaced, and repeating the steps to complete the replacement of other boom modules 70.

On the basis of the temporary pocket crane formed by the components, the temporary pocket crane can be installed and replaced by being matched with a common suspender, and can be further matched with a suspender module 70 shown in fig. 5-10 to meet corresponding installation, replacement and maintenance requirements.

Further, an exemplary configuration of boom module 70 is shown with reference to FIGS. 5-10, and includes an intermediate boom 73, a lower boom 72c, a connection block 74, a cable sensor 76, a cable force control structure, an upper suspension point 71, and a lower suspension point 72. In this embodiment, it can be seen that the boom module 70 is bifurcated, partially forming an intermediate boom 73, and partially replaced by an elongated lower boom 72 c; during operation, the core bearing and replacing area is the middle suspender 73, and the replacement of the middle suspender 73 can be completed rapidly by contacting the joint of the middle suspender 73 and the lower pull rod 72c.

In the design, as shown in fig. 5, the middle suspender 73 can be an epoxy spraying parallel steel wire suspender, a damping device is arranged in a suspender steel casing, the middle suspender 73 adopts a double-layer HDPE sheath, and a PVF adhesive tape corrosion prevention design is adopted. The top end of the middle suspender 73 is provided with an upper fork lug and is connected with an upper lug plate 71a at an upper suspension point 71 through an upper pin shaft 71 b. The bottom end of the middle suspender 73 is a tensioning end, and the bottom end is provided with an external thread section 73a and is connected with a connecting block 74 through a fastening nut 75. The matched fastening nut 75 is rotated, so that the intermediate suspender 73 can be rapidly tensioned. The middle lower section of the shaft of the middle boom 73 is drawn with an auxiliary scale 73b for recording the tension condition of the middle boom 73 to accelerate the replacement efficiency of the middle boom 73.

The lower pull rod 72c is a steel member and is made of high-strength steel, the upper end of the lower pull rod is provided with a hanging ring 72a for being fixed with a hanging hook 74a at the connecting block 74, and the bottom end of the lower pull rod is of a fork lug structure, namely, the bottom end of the lower pull rod is provided with a lower fork lug. The lower fork lugs are connected to lower lug plates 72b at lower suspension points 72 by lower pin shafts 72 d. In each set of the present invention, there are two drop links 72c.

The connecting block 74 is a steel member made of high-strength steel, and has a circular hole in the center for the middle boom 73 to pass through, and two hooks 74a on the sides for hooking the lower tie rod 72c, as shown in fig. 5.

The cable force sensor 76, i.e. a magnetic flux sensor, is mounted above the connection block 74 for real-time monitoring of the entire boom cable force and assisting the corresponding control device in achieving cable force control and optimization. The cable force control structure consists of a fastening nut 75, an external thread section 73a, a connecting block 74 and the like, and the cable force of the middle suspender 73 is changed by adjusting the fastening nut 75.

Further, as shown with reference to fig. 5-10, the upper suspension point 71 includes an upper ear plate 71a, an upper pad, an upper stiffener, etc., and is fixed to the arch rib a by welding. The lower suspension points 72 include lower ear plates 72B, lower backing plates, lower stiffeners, etc., which are secured to the deck beam B by welding. As shown in fig. 6-7, the lower suspension point 72 may be machined to different angles of inclination depending on whether the rib a is camber or toe-in, consistent with the center boom 73 axis.

By adopting the boom module 70 of the present invention, the installation and replacement functions of the boom module are maintained; after the installation of the boom module 70, before replacement, the real-time compensation of the tensile stress at the middle boom 73 can be realized through multiple maintenance operations, so that the stress relaxation problem of the boom module 70 is prevented, and the normal service life of the boom module 70 is ensured, specifically as follows:

when maintenance of the intermediate boom 73 is performed, the cable force is adjusted by tightening the tightening nut 75, and the number of rotations required for tightening the nut 75 is calculated by the following formula:

wherein:

n is the number of required rotations of the fastening nut 75;

f is a cable force adjustment value, which is obtained by subtracting the current cable force sensor 76 reading from the rated cable force value of the middle suspender 73;

l is the available section length of the intermediate boom 73; the usable length of the intermediate boom 73, i.e. the length of the shaft of the intermediate boom 73 from the tip to the fastening nut 75, i.e. the length of the load-carrying section of the intermediate boom 73 in actual operation.

p is the thread pitch of the external thread section 73a at the intermediate boom 73;

e is the modulus of elasticity of the intermediate boom 73;

s is the cross-sectional area of the intermediate boom 73.

To this end, the new boom module 70 described above provides the following technical advantages:

a. the boom module 70 easy to replace, provided by the invention, has the advantages of simple structure and convenience in installation and replacement, reduces the installation difficulty of the boom module 70, can realize the quick replacement of the middle boom 73, can effectively shorten the time and the number of manpower and equipment required by the replacement of the boom module 70, reduces the influence of the replacement of the boom module 70 on urban traffic, and reduces the construction cost of the replacement of the boom module 70.

b. The hanger rod module 70 provided by the invention is simple in structure, flexible in arrangement, safe and reliable, the installation and maintenance method is easy to operate, the hanger rod module can be flexibly installed according to the section change form of the arch rib A, the hanger rod module is widely applicable to various special-shaped arch bridge structures, the installation and replacement difficulty of the special-shaped hanger rod module 70 is reduced, the requirements of the installation and replacement of the special-shaped hanger rod module 70 on sites and equipment are reduced, the problems of difficult replacement and high replacement cost of the special-shaped hanger rod module 70 are solved, the construction risk during the replacement of the special-shaped hanger rod module 70 is reduced, and the application range of the arch bridge is enlarged.

c. The boom module 70 provided by the invention is simple and convenient to install, has lower requirement on installation space, is beneficial to carrying out installation work in a complex structural system of the special-shaped arch bridge, and has less labor and equipment required for installation and lower installation cost.

d. The boom module 70 adopts a novel PVF adhesive tape corrosion prevention design, can effectively prevent rainwater and the like from penetrating into the PE sleeve, and simultaneously isolate ozone, ultraviolet rays and the like from corroding HDPE, so that the problem that the boom module 70 is subjected to high stress and vibration conditions and is subjected to stress cracking caused by the influence of ozone, rainwater, acid and alkali and ultraviolet rays on an HDPE outer sheath pipe is solved, the durability of the boom module 70 is greatly improved, and the service life of the boom module 70 is prolonged.

e. The cable force control structure provided by the invention can be matched with the magnetic flux cable force sensor 76, so that the cable force is monitored in real time in the use process of the arch bridge, and cable force compensation is performed in time when the cable force is reduced; the cable force control structure provided by the invention is simple and convenient to operate, the arch bridge structure is not required to be dismantled when the cable force is regulated, a temporary structure is not required to be erected, and the normal use of the arch bridge is not influenced; the invention can simply and conveniently realize the cable force control of the arch bridge, effectively prolong the service life of the suspender module 70 and reduce the maintenance cost of the arch bridge.

f. The boom module 70 of the invention has simple and beautiful structure and unique shape, can be used as an ornament to increase the beauty and uniqueness of the arch bridge besides the functional advantages, widens the application scene of the steel arch bridge and has remarkable effect.

It will be understood by those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments, but includes other specific forms of the same or similar structures that may be embodied without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.

Claims (10)

1. An assembled special-shaped suspender module replacing device is characterized in that: the device comprises an assembled anchor ear (10) matched with the cross section shape of an arch rib, wherein the top end of a temporary sling (20) is fixed at the upper positioning point of the assembled anchor ear (10) through a universal joint module (30) in an angle-adjustable way, the bottom end of the temporary sling (20) is fixed on a lower hanging beam (40), the tension of the temporary sling (20) is realized through a compensation jack (50), and a bridge deck cross beam is placed above the lower hanging beam (40);

the spliced anchor ear (10) comprises corner end sliding blocks positioned at four corner ends, wherein an upper left corner end sliding block (11) and an upper right corner end sliding block (12) are fixed with each other through an upper layer split bolt (15), and a lower left corner end sliding block (13) and a lower right corner end sliding block (14) are fixed with each other through a lower layer split bolt (16); two ends of a left hinging rod (17) are respectively hinged with an upper left corner end sliding block (11) and a lower left corner end sliding block (13), and two ends of a right hinging rod (18) are respectively hinged with an upper right corner end sliding block (12) and a lower right corner end sliding block (14); the upper layer split bolt (15), the lower layer split bolt (16), the left hinging rod (17) and the right hinging rod (18) are respectively provided with a positioning plate (19) which is used for being attached to the corresponding surface of the arch rib.

2. The assembled special-shaped boom module replacement device according to claim 1, wherein: the upper layer split bolt (15), the lower layer split bolt (16), the left hinging rod (17), the right hinging rod (18) and the corner end sliding blocks of the four corner ends which are matched with each other are used as a group of positioning units, and the two groups of positioning units are connected with each other through positioning rods (60) arranged along the length direction of the arch rib; a rotary drum (31) is respectively rotatably matched on a positioning rod (60) between the two groups of upper right corner end sliding blocks and between the two groups of upper left corner end sliding blocks (11), a mounting hole is radially penetrated through the rotary drum (31), the top end of the temporary sling (20) is hinged in the mounting hole through a horizontal hinge shaft (32), and the axis of the horizontal hinge shaft (32) is vertical to the axis direction of the rotary drum (31); the rotary drum (31) and the horizontal hinge shaft (32) are combined to form the universal joint module (30).

3. The assembled special-shaped boom module replacement device according to claim 2, wherein: one side of the positioning plate (19) facing the arch rib surface is provided with an anti-slip wear-resistant layer.

4. A modular shaped boom module changing apparatus according to claim 1 or 2 or 3, characterized in that: the two groups of the spliced hoops (10) are sequentially arranged along the length direction of the arch rib, and temporary slings (20) at the two groups of the spliced hoops (10) extend downwards to be respectively fixed at two ends of the lower hanging beam (40), so that the lower hanging beam (40) forms a bearing platform of a bridge deck system cross beam; the top end of the suspender module (70) is fixed on the arch rib through an upper suspension point (71), the bottom end of the suspender module (70) is fixed on a bridge deck system beam through a lower suspension point (72), and a tensioning jack for providing tensioning force of the suspender module (70) is arranged at the bridge deck system beam; a cable sensor (76) for testing cable force at the boom module (70) is also disposed on the boom module (70).

5. The assembled special-shaped boom module replacement device of claim 4, wherein: the suspender module (70) comprises a middle suspender (73), the top end of the middle suspender (73) is hinged at the upper suspension point (71), a connecting block (74) is sleeved at the bottom end of the middle suspender (73), and hooks (74 a) are symmetrically arranged on two sides of the connecting block (74), so that hook fit is formed between the two symmetrically arranged suspension rings (72 a) at the lower suspension point (72) respectively, and further the connecting block (74) is limited to act upwards relative to the lower suspension point (72); a section of the rod body of the middle suspender (73) extending out of the connecting block (74) is provided with an external thread section (73 a), and a fastening nut (75) is in threaded fit with the external thread section (73 a), so that the middle suspender (73) is limited to move upwards relative to the connecting block (74); a cable sensor (76) is arranged on the intermediate boom (73).

6. The assembled special-shaped boom module replacement device of claim 5, wherein: the lower suspension point (72) comprises a lower lug plate (72 b) directly fixed on a bridge deck system beam, the bottom of a lower pull rod (72 c) is hinged on the lower lug plate (72 b), and the top of the lower pull rod (72 c) is provided with the suspension ring (72 a); the number of the lower pull rods (72 c) is two, and the lower pull rods are symmetrically arranged along the axis of the middle suspender (73).

7. The assembled special-shaped boom module replacement device of claim 6, wherein: the lower ear plate (72 b) comprises a bottom plate and a vertical plate arranged on the bottom plate, and the vertical plate and the bottom plate are intersected with each other; the risers constitute hinge plates for hinge-connecting the lower tie rods (72 c) and are hinge-connected to each other by a lower pin (72 d).

8. The assembled special-shaped boom module replacement device of claim 7, wherein: the upper lifting point (71) comprises an upper lug plate (71 a) directly fixed on the arch rib, a fork lug is coaxially arranged at the top end of the middle suspender (73), and the fork lug and the upper lug plate (71 a) are inserted into each other and hinged with each other through an upper pin shaft (71 b).

9. The assembled special-shaped boom module replacement device of claim 5, wherein: when maintenance of the intermediate boom (73) is performed, the cable force is adjusted by tightening the tightening nut (75), and the number of required rotations of the tightening nut (75) is calculated by the following formula:

wherein:

n is the number of required rotations of the fastening nut (75);

f is a cable force adjustment value, and is obtained by subtracting the reading of the current cable force sensor (76) from the rated cable force value of the middle suspender (73);

l is the available section length of the intermediate boom (73);

p is the thread pitch of the external thread section (73 a) at the middle suspender (73);

e is the elastic modulus of the intermediate boom (73);

s is the cross-sectional area of the intermediate boom (73).

10. The replacement method, which is applied to the assembled special-shaped suspender module replacement device as claimed in claim 1, is characterized by comprising the following steps:

s1, installing an assembled hoop (10) on an arch rib of a position where a suspender module (70) to be replaced is located, adjusting the assembled hoop (10) to enable the shape of the assembled hoop to be matched with the section of the arch rib, and then connecting and fastening the assembled hoop through a split bolt;

s2, installing a lower hanging beam (40) below a bridge deck system beam, then installing temporary slings (20), and adjusting the lengths of the temporary slings (20) so as to tightly pocket the bridge deck system beam, thereby ensuring that the stress of each temporary sling (20) is uniform;

s3, installing a compensation jack (50) below the lower hanging beam (40), communicating the compensation jack (50) with a hydraulic pump station through a hydraulic pipe, and checking the connection safety and the stable load holding capacity of each component;

s4, installing a static level gauge and a cable sensor (76) on the periphery of the boom module (70) to be replaced and the adjacent boom module (70);

s5, cutting off steel wires of the original boom module (70) step by step, controlling the compensation jack (50) to synchronously stretch step by step, and adjusting elevation change values of all control points to be in a design requirement range so as to realize the conversion of the cable force of the original boom module (70) to the position of the spliced special-shaped boom module replacing device;

s6, installing a new boom module (70) and tensioning by using a tensioning jack, and controlling a compensation jack to retract a cylinder step by step to convert the cable force at the position of the spliced special-shaped boom module replacing device to the position of the new boom module (70), and anchoring the new boom module (70) after tensioning in place;

s7, removing the spliced special-shaped suspender module replacing device, transferring to the position of the suspender module (70) to be replaced next, and repeating the steps to complete the replacement of other suspender modules.

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