CN112227217A - Bridge rotation system and application thereof in bridge rotation construction - Google Patents
Bridge rotation system and application thereof in bridge rotation construction Download PDFInfo
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- CN112227217A CN112227217A CN202011202298.6A CN202011202298A CN112227217A CN 112227217 A CN112227217 A CN 112227217A CN 202011202298 A CN202011202298 A CN 202011202298A CN 112227217 A CN112227217 A CN 112227217A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Abstract
The invention relates to bridge construction, in particular to a bridge rotation system and application thereof in bridge rotation construction. The bridge rotation system comprises a rotation support formed by an upper ball pendulum and a lower ball pendulum which are arranged oppositely at inner end surfaces and are in running fit, the outer end surface of the upper ball pendulum is fixed on an upper bearing platform, the outer end surface of the lower ball pendulum is fixed on a lower bearing platform, and a traction rotation device is arranged between the lower bearing platform and the upper bearing platform; the surface of the lower bearing platform outside the rotating support is provided with cushion stones distributed annularly at intervals, the upper surface of the cushion stones is provided with a height adjusting device, the top of the height adjusting device is assembled with the annular slideway in a clearance way and forms sliding fit with the annular slideway through the height of the height adjusting device, and the annular slideway is fixed with the inner surface of the upper bearing platform. The invention solves the technical problem that the construction can not be carried out on the safety of crossing the existing road by adopting the existing construction method, and has the advantages of simple structure, high construction safety, high construction speed and the like.
Description
Technical Field
The invention belongs to bridge construction, and particularly relates to a bridge rotation system and application thereof in bridge rotation construction.
Background
At present, the construction of a turning bridge in China mostly adopts a flat turning method, namely, the bridge is manufactured on one side of a railway or a highway, the turning device is used for turning the bridge in place, the turning method construction can better avoid the influence on the transportation of other lines, the difficulty of erecting a long-span bridge on a river channel with high mountains and gorges, water depth rush or frequent ship navigation is overcome, and the advantage is more obvious especially for constructing urban overpasses and railway overpasses with busy traffic and transportation.
The upper and lower bearing platforms where the swivel structure is located need to be backfilled and sealed into a whole after the existing swivel is completed, although the swivel bridge is strengthened and stabilized after the swivel is completed by the method, the safe operation of the bridge is guaranteed, the necessary maintenance work needs to be carried out on the bridge in the service life of the bridge, in addition, under some special conditions, such as natural disasters and the like, the swivel bridge is damaged, and the maintenance or dismantling work needs to be carried out, at this time, how to carry out construction on the safety of the existing road (especially the electrified railway) crossed is not met by the existing swivel construction method.
From the first rotary bridge in China to the present 40 years, various construction difficulties appear when a plurality of rotary bridges are maintained or need to be dismantled and rebuilt, and the maintenance and dismantling construction cost is multiplied compared with other bridges. Therefore, if the technical scheme that the rotation of the rotation bridge can be carried out at any time according to requirements can be realized after the rotation of the bridge, a series of problems of later maintenance, construction and the like of the rotation bridge can be successfully solved.
The background art retrieved by the applicant includes:
1. patent document No. CN106192766B discloses a pier top swivel device for steel beams, which is disposed between the bottom of the steel beam and the pier top and includes a swivel spherical hinge provided at the center and a swivel support device concentric with the swivel spherical hinge and provided at the periphery of the swivel spherical hinge. Similar with the tradition structure of turning, the demand of turning of bridge has been realized to this device to realized turning the device wholly can dismantle. However, the swivel device also has limitations and some drawbacks: firstly, this device only can be applied to the mound top and turn, can only be used for the mound top of girder steel structure to turn simultaneously. Because most of the turning bridges are turning structures at the bottoms of piers nowadays, and along with the increasing tonnage of the turning bridges, steel beams cannot meet the current design requirements, so the market space of the turning devices is smaller and smaller. Secondly, the whole body of the turning device is detachable, but how to support and connect the upper part and the lower part of the bridge after the turning device is detached is not mentioned, the turning is only a process, and the normal operation of the bridge after the turning is only a purpose, so that how to support the upper part and the lower part of the bridge after the detachment is very important. Thirdly, if maintenance is needed after the swivel bridge is operated for a period of time, the above documents cannot provide an effective solution for how to construct the swivel bridge on the basis of ensuring the safety of the existing road crossed, especially the electrified railway.
2. The patent document with publication number CN108951427A discloses a turning construction method for a double-width integral T-shaped rigid frame with extra-large tonnage, which is the mainstream turning construction method at present, and describes in detail the construction procedures of manufacturing, installing, weighing, trying to turn, formal turning and the like of a turning device. Also mentioned herein are: and after the rotating body is in place, sealing concrete pouring construction is immediately carried out, the fixation of the turntable structure is completed in the shortest time, after the T-shaped rigid frame rotating body is in place, the upper surface of the chassis is cleaned, the reserved steel bars are welded, and sealing concrete is poured in the vertical mold, so that the upper turntable and the lower turntable are connected into a whole.
The above patent documents refer to pouring and sealing the upper and lower turntables after the swivel is in place. Similarly, if the swivel bridge needs to be maintained after operating for a period of time, and the normal operation of the existing road spanned cannot be influenced, only the bridge can be selected to rotate, but how to break the sealing layer and how to ensure that the sealed swivel system can normally rotate after breaking, an effective solution cannot be obtained through the patent documents.
Through the analysis of the two patent documents, the existing normal rotation construction method is basically mature, but no reasonable and effective solution is provided for the rotation construction of the bridge.
Disclosure of Invention
The invention aims to provide a bridge rotation system and application thereof in bridge rotation construction, which can perform rotation construction on a rotation bridge at any time according to needs while meeting the existing rotation construction method of the rotation bridge, and simultaneously does not need to backfill and seal upper and lower rotary tables, thereby avoiding resource waste caused by dismantling and rebuilding the traditional rotation bridge during overhaul and maintenance.
The overall technical concept of the invention is as follows:
the bridge slewing system comprises a slewing support formed by an upper ball pendulum and a lower ball pendulum which are arranged oppositely at inner end surfaces and are in running fit with each other, wherein the outer end surface of the upper ball pendulum is fixed on an upper bearing platform, the outer end surface of the lower ball pendulum is fixed on a lower bearing platform, and a traction slewing device is arranged between the lower bearing platform and the upper bearing platform; the surface of the lower bearing platform outside the rotating support is provided with cushion stones distributed annularly at intervals, the upper surface of the cushion stones is provided with a height adjusting device, the top of the height adjusting device is assembled with the annular slideway in a clearance way and forms sliding fit with the annular slideway through the height increasing of the height adjusting device, and the annular slideway is fixed with the lower surface of the upper bearing platform.
The bridge rotation system is applied to bridge rotation construction.
The specific technical structure of the invention is as follows:
in order to facilitate the height-adjusting device to support the beam body and play a role in the rotation of the bridge, the preferable technical means is that the height-increasing amount of the height-adjusting device is 0-30 mm.
The height adjusting device is preferably a height adjusting support, but is not limited to injection supports, and any device with the height adjusting function does not depart from the protection scope of the patent. Wherein preferred technological means of realization be, the device of increaseing choose to increase the support for use, increase the device and include from last upper bracket board, rubber backing plate, the basin bedplate that sets up down, the pelvic cavity bottom of basin bedplate is located to the rubber backing plate, the laminating of upper bracket board sets up in rubber backing plate upper surface, sets up the inside slip casting pore of intercommunication pelvic cavity on the basin bedplate outer wall.
In order to realize smoother sliding fit between the top of the height adjusting device and the annular slideway, the preferable technical implementation means is that a tetrafluoro sliding plate is fixed on the upper surface of the upper seat plate.
In order to prevent impurities from entering the basin cavity of the basin seat plate, the preferable technical implementation means is that a sealing ring is arranged between the outer edge of the upper support plate and the inner surface of the basin cavity of the basin seat plate.
For better realizing annular slide and heightening device top sliding fit, preferred technical implementation means is, annular slide is including burying the pre-buried steel sheet of burying on last cushion cap underground, the annular steel sheet of surface and pre-buried steel sheet fixed, and annular steel sheet internal surface and heightening device top adaptation and its internal surface are fixed with mirror surface corrosion resistant plate, and mirror surface corrosion resistant plate accessible heightening device increases and heightens the device top and form sliding fit.
In order to better realize the positioning of the heightening device and realize the stable and effective support of the beam body, the preferable technical realization means is that the cushion stones on the two sides of the heightening device are provided with limit blocks.
In order to facilitate the repair and maintenance of personnel, the preferable technical implementation means is that the cushion stone is provided with an inspection hole.
In order to position the rotary body structure after the rotary body is in place in bridge construction, the preferable technical implementation means is that the upper bearing platform and the lower bearing platform are correspondingly provided with longitudinally distributed embedded steel bars, and the upper bearing platform and the embedded steel bars on the lower bearing platform are fixed through connecting steel bars.
For better realizing the fixed of embedded steel bar and connecting reinforcement, the more preferred technique realizes several sections and is, connecting reinforcement pass through criss-cross mode and go up the cushion cap and fixed with the embedded steel bar on the cushion cap down.
In order to better protect the swivel support and avoid the influence on the rotating effect caused by the entering of sundries, the preferred technical implementation means is that the outer sides of the upper spherical pendulum and the lower spherical pendulum of the height adjusting device are provided with sealing coamings fixed by the hoops.
In order to realize the rotation of the rotating support, the preferred technical implementation means is that the traction rotating device comprises a forward rotation counter-force seat and a rotating counter-force seat which are arranged on the lower bearing platform and have opposite traction directions, a rotating anchor disc which is pre-embedded in the inner surface of the upper bearing platform and can be rotatably assembled with the upper bearing platform, and a hanging part which is arranged on the upper bearing platform and can be matched with the end part of the steel strand.
In order to facilitate the realization of the secondary height adjustment of the height adjustment device and meet the height adjustment requirement during the rotation and the revolution of the height adjustment device, the preferable technical proposal is that the height adjustment device comprises at least two grouting pore passages which are arranged on the basin seat plate and are communicated with the outside and the inside of the basin cavity, and at least one grouting pore passage is encapsulated with sealing paraffin.
The application of the bridge rotation system in bridge rotation construction comprises the following steps:
a. when the bridge erection rotation is completed, mounting height-adjusting devices on the cushion stones of the lower bearing platform, injecting liquid height-increasing materials into the pelvic cavity through a grouting hole channel to synchronously pressurize and increase the height-adjusting devices until the height-adjusting devices support the beam body and the supporting force does not exceed the weight of the beam body, and packaging grouting plugging wires and marking after the injected liquid materials are solidified;
b. fixing the embedded steel bars on the upper bearing platform and the lower bearing platform through connecting steel bars; protecting the outer sides of the upper bearing platform and the lower bearing platform;
c. when the bridge needs to rotate, detaching a fixing device between the upper bearing platform and the lower bearing platform and a protection device outside the upper bearing platform and the lower bearing platform;
d. cleaning the surfaces of all parts in the bridge rotation system;
e. checking whether the height adjusting device can normally support the top beam or not, and if the height adjusting device is damaged, additionally arranging the height adjusting device at a free point of the cushion stone;
f. determining the top beam load of the height adjusting device according to the aging condition of the swivel support, if the swivel support cannot be used, heating a grouting pore passage which is not marked, after sealed paraffin is melted, increasing the height adjusting device to the upper spherical pendulum and the lower spherical pendulum through the grouting pore passage to separate the upper spherical pendulum and the lower spherical pendulum from each other, and if the swivel support can still realize the swivel function, increasing the height adjusting device to enable the height adjusting device to bear part of the beam load;
g. re-anchoring the steel strand in the opposite direction, and connecting the steel strand with a synchronous jack arranged on a rotary counter-force seat to perform trial rotation;
h. formally revolving;
i. fixing the embedded steel bars on the upper bearing platform and the lower bearing platform through connecting steel bars; and protecting the outer sides of the upper bearing platform and the lower bearing platform to complete rotation.
In order to reduce the load of the swivel support and further reduce the failure rate of the swivel support, the preferable technical implementation means is that in the step a, the heightening device is pressurized to be uniformly pressure-bearing through a grouting hole.
In order to increase the connection firmness of the embedded steel bars and the connecting steel bars and improve the fixing effect, the preferable technical implementation means is that the connecting steel bars are welded and fixed with the embedded steel bars on the upper bearing platform and the lower bearing platform in a cross mode.
In order to better protect the swivel support, the preferred technical implementation means is that in the step b, the protection of the outer sides of the upper bearing platform and the lower bearing platform is implemented by fixing the connecting steel bars and the embedded steel bars on the upper bearing platform and the lower bearing platform, and pouring seal concrete between the upper bearing platform and the lower bearing platform on the outer side of the swivel support.
In a further preferable technical implementation means, the step b of protecting the outer sides of the upper and lower bearing platforms includes fixing the connecting steel bars to the embedded steel bars on the upper and lower bearing platforms, fixing the sealing coaming to the outer sides of the upper and lower spherical pendulums by a hoop, and pouring a sealing layer concrete between the upper and lower bearing platforms outside the swivel support.
The invention achieves the substantive characteristics and obvious technical progress that:
1. the rotary construction method provided by the invention can carry out rotary construction on the rotary bridge at any time according to needs without backfilling and sealing the upper rotary table and the lower rotary table, successfully solves a series of problems of later maintenance, construction and the like of the rotary bridge, and avoids resource waste caused by the need of dismantling and rebuilding in the traditional overhaul and maintenance of the rotary bridge. The construction safety is high, the construction speed is high, the field operability is strong, the investment is low, and the economic and social benefits are obvious.
2. The annular arrangement mode of the heightening devices is adopted, so that firstly, the heightening devices can heighten to form effective support for the beam body; secondly, when the rotating support fails, the beam body can be rotated through the height adjusting device; thirdly, can realize in time changing or maintaining when heightening the device and breaking down.
3. Adopt and increase the device and carry out the auxiliary stay to the roof beam body, can effectively reduce the load of support of turning, improve its life.
4. The bridge is fixed by the connecting steel bars and the embedded steel bars, so that the bridge can be effectively positioned after rotating or closing, the connecting mode is stable and reliable, and the bridge is simple and convenient to disassemble to realize rotating.
5. The adoption of the sealing coaming and the sealing layer concrete structure effectively realizes the integral internal protection of the swivel support and the swivel system while being convenient for disassembly and assembly, avoids external sundries from entering, and ensures the relative closeness and stability of the working environment of the swivel system.
6. Heightening device top and annular slide clearance assembly and accessible heightening device increase and annular slide form sliding fit's structural design, have firstly structurally guaranteed to heighten the device and increased the back and the annular slide between the cooperation is nimble, secondly have the fit clearance at heightening device and annular slide and reduce the load, reduce its fault rate because of the load produces.
7. By adopting the structural design of the inspection hole, the operation of the rotary system can be conveniently checked and maintained by personnel on the premise of not influencing the operation and the supporting stability of the system.
8. The structural design of the cushion stone and the limiting block is adopted, so that the installation and the arrangement of the height adjusting device can be facilitated, and the adjustment amount of the height adjusting device is reduced; and secondly, the positioning of the height adjusting device is convenient to realize, and the movement of the height adjusting device under the action of external force is avoided, so that the layout of the stable support is changed.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic distribution diagram of the swivel support and the height adjusting device of the present invention.
Fig. 3 is a schematic structural view of the swivel support of the present invention in normal rotation.
Fig. 4 is a schematic structural view of the swivel support of the present invention in a non-operating state during swiveling.
Fig. 5 is a schematic view of the swivel and swivel traction of the present invention.
Fig. 6 is a schematic elevation view of the anchor disc installation during swiveling of the present invention.
Fig. 7A is a schematic plan view of the swivel mount of the present invention.
Fig. 7B is an enlarged view of a portion i of fig. 7A.
Figure 8 is a schematic view of the structure of the height-adjusting device of the present invention,
fig. 9 is a schematic view of the pressurization construction of the heightening device in the present invention.
Fig. 10A is a schematic view of the annular chute configuration of the present invention.
Fig. 10B is a partial enlarged view of portion ii in fig. 10A.
FIG. 11 is a schematic view of the structure of a stepping stone of the height adjusting device of the present invention.
FIG. 12 is a schematic top view of a spacer of the height-adjusting device of the present invention.
Fig. 13 is a schematic view of connection between the embedded bars and the connecting bars of the upper and lower bearing platforms according to the present invention.
Fig. 14 is a top view of fig. 13.
FIG. 15 is a vertical view of the skin seal after completion of the revolution in the present invention.
The reference numbers in the drawings are as follows:
1. a swivel support; 1A, putting a ball pendulum; 1B, putting a ball; 1C, sealing the enclosing plate; 2. an annular chute; 2A, pre-burying a steel plate; 2B, an annular steel plate; 2C, mirror surface stainless steel plate; 3. a height adjusting device; 3A, a tetrafluoro slide plate, 3B and an upper support plate; 3C, sealing rings; 3D, a rubber base plate; 3E, a basin seat plate; 3F, grouting and plugging the yarns; 4. a cushion stone; 5. an upper bearing platform; 6. a lower bearing platform; 7. a positive rotation counter-force seat; 8. a rotary reaction force seat; 9. A rotary anchor disc; 10. an injection molding machine; 11. connecting reinforcing steel bars; 12. embedding reinforcing steel bars in advance; 13. and (5) sealing layer concrete.
Detailed Description
The present invention is further described with reference to the following examples, which are not intended to limit the scope of the present invention, and the claims are not to be interpreted as limiting the scope of the present invention.
Examples
The concrete structure of the embodiment is shown in the figure, the bridge slewing system comprises a slewing support 1 consisting of an upper pendulum 1A and a lower pendulum 1B, wherein the inner end surfaces of the upper pendulum 1A and the lower pendulum 1B are oppositely arranged and are in running fit, the outer end surface of the upper pendulum 1A is fixed on an upper bearing platform 5, the outer end surface of the lower pendulum 1B is fixed on a lower bearing platform 6, and traction slewing devices are arranged on the lower bearing platform 6 and the upper bearing platform 5; the surface of a lower bearing platform 6 on the outer side of the rotating body support 1 is provided with cushion stones 4 distributed in an annular shape at intervals, the upper surfaces of the cushion stones 4 are provided with heightening devices 3, the tops of the heightening devices 3 are in clearance assembly with annular slide ways 2 and can form sliding fit with the annular slide ways through the heightening of the heightening devices 3, and the annular slide ways 2 and the inner surface of the lower bearing platform 6 are fixed.
The bridge rotation system is applied to bridge rotation construction.
The increasing amount of the height adjusting device 3 is 0-30 mm.
Heightening device 3 chooses for use and heightens the support, heightening device 3 include from last upper bracket board 3B, rubber backing plate 3D, basin bedplate 3E that set up down, basin bedplate 3E's pelvic cavity bottom is located to rubber backing plate 3D, the laminating of upper bracket board 3B sets up in rubber backing plate 3D upper surface, sets up the inside slip casting pore of intercommunication pelvic cavity on the basin bedplate 3E outer wall.
And a tetrafluoro sliding plate 3A is fixed on the upper surface of the upper seat plate 3B.
And a sealing ring 3C is arranged between the outer edge of the upper support plate 3B and the inner surface of the basin cavity of the basin seat plate 3E.
The cushion stones 4 at two sides of the heightening device 3 are provided with limiting blocks.
The cushion stone 4 is provided with an inspection hole.
The upper bearing platform 5 and the lower bearing platform 6 are correspondingly provided with longitudinally distributed embedded steel bars 12, and the embedded steel bars 12 on the upper bearing platform 5 and the lower bearing platform 6 are fixed through connecting steel bars 11. The connecting steel bars 11 are fixed with the embedded steel bars 12 on the upper bearing platform 5 and the lower bearing platform 6 in a cross mode.
And sealing coamings 1C fixed by hoops are arranged on the outer sides of the upper spherical pendulum 1A and the lower spherical pendulum 1B of the swivel support 1.
The traction and rotation device comprises a forward rotation counter-force seat 7 and a rotation counter-force seat 8 which are arranged on the lower bearing platform 6 and have opposite traction directions, a rotation anchor disc 9 which is pre-embedded in the inner surface of the upper bearing platform 5 and can be rotatably assembled with the upper bearing platform, and a hanging part which is arranged on the upper ball pendulum 1A and can be matched with the end part of the steel strand.
The grouting pore channels of the height adjusting device 3 are at least two which are arranged on the basin seat plate 3E and communicated with the outside and the inside of the basin cavity, and at least one of the grouting pore channels is packaged with sealing paraffin.
The application of the bridge rotation system in bridge rotation construction comprises the following steps:
a. when the bridge erection rotation is completed, the heightening devices 3 are installed on the cushion stones 4 of the lower bearing platform 6, liquid heightening materials are injected into the pelvic cavity through grouting holes by an injection press 10 to synchronously pressurize and heighten the heightening devices 3 until the heightening devices support the beam body and the supporting force does not exceed the weight of the beam body, and after the injected liquid materials are solidified, grouting plugging wires 3F are packaged and marked;
as shown in fig. 5, during the construction of a swivel bridge, for a bridge with a swivel requirement, a forward rotation reaction seat 7 and a swivel reaction seat 8 in forward and reverse directions are arranged on a lower bearing platform 6, the forward rotation reaction seat 7 is used for tensioning a steel strand of a normal swivel, the swivel reaction seat 8 is used for tensioning the steel strand during the swivel, after the normal swivel is finished, the steel strand used for the normal swivel is removed, when the swivel is performed, one end of the steel strand penetrates into a reserved swivel anchor plate 9 of the upper bearing platform 5, the steel strand is locked by a clamping piece, the other end of the steel strand penetrates into tensioning equipment behind the swivel reaction seat 8 after the upper bearing platform 5 is wound for a half circle, and the number of the steel strands is the same as that of the steel strand when the swivel is closed for the first time.
b. Fixing the embedded steel bars 12 on the upper bearing platform 5 and the lower bearing platform 6 through the connecting steel bars 11; protecting the outer sides of the upper bearing platform 5 and the lower bearing platform 6;
c. when the bridge needs to be rotated, the fixing device between the upper bearing platform 5 and the lower bearing platform 6 and the protection device at the outer sides of the upper bearing platform 5 and the lower bearing platform 6 are removed;
d. cleaning the surfaces of all parts in the bridge rotation system;
e. checking whether the height adjusting device 3 can normally support the top beam or not, and if the height adjusting device 3 is damaged, additionally arranging the height adjusting device 3 at a vacant point of the cushion stone 4;
f. determining the top beam load of the height adjusting device 3 according to the aging condition of the swivel support 1, if the swivel support 1 cannot be used, heating a grouting pore channel which is not marked, after sealed paraffin is melted, uniformly increasing the height adjusting device 3 to separate the upper spherical pendulum 1A and the lower spherical pendulum 1B up and down by adopting an injection molding machine 10 through the grouting pore channel, and particularly, referring to fig. 9, if the swivel support 1 can still realize the swivel function, increasing the height adjusting device 3 to enable the height adjusting device 3 to bear part of the beam load;
g. re-anchoring the steel strand in the opposite direction, and connecting the steel strand with a synchronous jack arranged on the rotary counter-force seat 8 to test rotation;
h. formally revolving;
i. removing the steel strand, and fixing the embedded steel bars 12 on the upper bearing platform 5 and the lower bearing platform 6 through the connecting steel bars 11; and the outer sides of the upper bearing platform 5 and the lower bearing platform 6 are protected to complete rotation.
And in the step a, the heightening device 3 is pressurized to be uniformly pressure-bearing through a grouting hole.
And b, welding and fixing the connecting steel bars 11 with the embedded steel bars 12 on the upper bearing platform 5 and the lower bearing platform 6 in a cross mode.
In the step B, the protection of the outer sides of the upper bearing platform 5 and the lower bearing platform 6 is realized by fixing the connecting steel bars 11 and the embedded steel bars 12 on the upper bearing platform 5 and the lower bearing platform 6, fixing the sealing coaming 1C on the outer sides of the upper spherical pendulum 1A and the lower spherical pendulum 1B through a hoop, and pouring sealing layer concrete 13 between the upper bearing platform 5 and the lower bearing platform 6 on the outer side of the swivel support 1.
When the height-adjusting device 3 is adjusted to be high, the bi-component polyurethane rubber is injected into the basin cavity of the basin seat plate 3E through the grouting hole by the injection machine (or other height-adjusting equipment), the stress state of each height-adjusting device 3 is observed, and each height-adjusting device 3 can be uniformly pressed. The pressure stabilization is performed for a period of time, the curing of the two-component polyurethane rubber is waited, the two-component polyurethane rubber is a high-molecular elastic material, the normal-temperature self-fluidization function is realized, the mechanical property index is equivalent to that of a pressure-bearing rubber plate of a conventional basin-type rubber support of a railway, and the corner requirement after the posture of a beam body is adjusted can be met. Each injection molding machine 10 is provided with a hydraulic sensor, the pressure of each injection molding machine 10 is kept synchronous all the time, and meanwhile, the height of the beam body is monitored all the time through a height measuring device, so that the beam body can be stably jacked.
Taking a 5000 tonne swivel bridge as an example, the upper bearing platform 5 is typically about 6m in diameter and the swivel support 1 is 2050mm in diameter.
According to the structure size, the rotation cushion stone 4 is arranged in the range of 4m-5m in diameter, the cushion stone 4 is evenly divided into a plurality of point positions by the stop blocks, and the annular slide way 2 is arranged on the lower surface of the upper bearing platform 5 right above the cushion stone 4.
Taking 8 groups as an example, the height adjusting device 3 heats one grouting channel of the height adjusting device 3 after normal rotation is completed to melt the sealing paraffin therein, and an injection press is adopted to press a top beam to the height adjusting device 3 through the grouting channel, so that the height adjusting device 3 bears part of the weight of the beam body, and the stress of each group of height adjusting device 3 is uniform. For example, 8 sets of height-adjusting devices 3 are made to bear 1000 tons of beam weight (not limited to specific tons), and each set of height-adjusting devices 3 is pressurized to 10Mpa and kept stable by using an injection molding machine through a grouting hole.
When the bridge needs to rotate, the rotating support 1 and the height adjusting device 3 are checked, if the rotating support 1 can continuously realize the rotating function, the top beam does not need to be continuously pressed on the height adjusting device 3, the rotating support 1 still serves as a main rotating structure, and the height adjusting devices 3 which are distributed annularly play roles in supporting and assisting in sliding. If the swivel support 1 is aged or damaged and cannot continuously realize the swivel function, the top beam needs to be continuously pressed on the height adjusting devices 3, so that the upper and lower spherical pendulums of the swivel support 1 are completely separated, at the moment, the height adjusting devices 3 distributed annularly bear the weight of the whole 5000 tons of beam bodies, for example, 8 groups of height adjusting devices (not limited to 8 groups) are still used, each group of height adjusting devices 3 bear the weight of 50000/8-6250 KN, after the other grouting pore is heated to melt the sealing paraffin therein, an injection press is used for pressurizing each group of height adjusting devices to 35MPa through the grouting pore and keeping stability.
At the moment, the height adjusting devices 3 distributed annularly bear the whole weight of the beam body, the friction coefficient of the tetrafluoro sliding plate is 0.03, the calculated rotary starting force is 150 tons, the breaking force of each steel strand is 26 tons, and in consideration of the safety factor, 15 steel strands can be arranged on each side of the rotary anchor disc 9.
Claims (19)
1. The bridge rotation system comprises a rotation support (1) consisting of an upper spherical pendulum (1A) and a lower spherical pendulum (1B) which are oppositely arranged at inner end surfaces and are in running fit, wherein the outer end surface of the upper spherical pendulum (1A) is fixed on an upper bearing platform (5), the outer end surface of the lower spherical pendulum (1B) is fixed on a lower bearing platform (6), and a traction rotation device is arranged between the lower bearing platform (6) and the upper bearing platform (5); the device is characterized in that the surface of a lower bearing platform (6) on the outer side of a rotating support (1) is provided with cushion stones (4) distributed in an annular shape at intervals, the upper surface of each cushion stone (4) is provided with a heightening device (3), the tops of the heightening devices (3) are in clearance assembly with an annular slide way (2) and can form sliding fit with the annular slide way through heightening of the heightening devices (3), and the annular slide way (2) is fixed with the inner surface of an upper bearing platform (5).
2. Bridge slewing system according to claim 1, characterized in that the height-increasing means (3) has an increase of 0-30 mm.
3. The bridge slewing system according to claim 1 or 2, wherein the height-adjusting device (3) comprises an upper support plate (3B), a rubber base plate (3D) and a basin seat plate (3E) which are arranged from top to bottom, the rubber base plate (3D) is arranged at the bottom of a basin cavity of the basin seat plate (3E), the upper support plate (3B) is attached to the upper surface of the rubber base plate (3D), and a grouting hole communicated with the interior of the basin cavity is formed in the outer wall of the basin seat plate (3E).
4. The bridge slewing system according to claim 3, characterized in that a tetrafluoro slide plate (3A) is fixed on the upper surface of the upper seat plate (3B).
5. The bridge slewing system according to claim 3, characterized in that a sealing ring (3C) is arranged between the outer edge of the upper support plate (3B) and the inner surface of the basin cavity of the basin seat plate (3E).
6. The bridge slewing system according to any one of claims 1, 2, 4 or 5, wherein the annular slideway (2) comprises an embedded steel plate (2A) embedded on the lower bearing platform (6), an annular steel plate (2B) with an outer surface fixed with the embedded steel plate (2A), an inner surface of the annular steel plate (2B) is matched with the top of the height-adjusting device (3) and an inner surface of the annular steel plate is fixed with a mirror surface stainless steel plate (2C), and the mirror surface stainless steel plate (2C) can form sliding fit with the top of the height-adjusting device (3) through the height increase of the height-adjusting device (3).
7. The bridge slewing system according to any one of claims 1, 2, 4 or 5, characterized in that limiting blocks are arranged on the bolsters (4) on both sides of the height-adjusting device (3).
8. The bridge slewing system according to claim 7, characterized in that the skid (4) is provided with inspection holes.
9. The bridge rotation system of claim 1, wherein the upper bearing platform (5) and the lower bearing platform (6) are correspondingly provided with embedded steel bars (12) which are longitudinally distributed, and the upper bearing platform (5) and the embedded steel bars (12) on the lower bearing platform (6) are fixed through connecting steel bars (11).
10. The bridge slewing system according to claim 9, wherein the connecting bars (11) are fixed to the embedded bars (12) on the upper bearing platform (5) and the lower bearing platform (6) in a crisscross manner.
11. The bridge slewing system according to any one of claims 1, 9 or 10, characterized in that the outer sides of the upper and lower rockers (1A, 1B) of the swivel support (1) are provided with sealing skirts (1C) fixed by clips.
12. The bridge slewing system according to claim 1, wherein the traction slewing device comprises a forward reaction seat (7) and a slewing reaction seat (8) which are arranged on the lower bearing platform (6) and have opposite traction directions, a slewing anchor disk (9) which is pre-buried in the inner surface of the upper bearing platform (5) and can be rotatably assembled with the upper bearing platform, and a hanging part which is arranged on the upper bearing platform (5) and can be matched with the end of the steel strand.
13. The bridge slewing system according to claim 1, characterized in that the grouting openings of the height-adjusting device (3) are at least two, which are arranged on the basin seat plate (3E) and communicated with the outside and the interior of the basin, and at least one is packaged with sealing paraffin.
14. Use of a bridge slewing system according to claims 1-13 in bridge slewing construction.
15. Use according to claim 14, characterized in that it comprises the following steps:
a. when the bridge erection rotation is completed, the heightening devices (3) are installed on the cushion stones (4) of the lower bearing platform (6), liquid heightening materials are injected into the pelvic cavity through the grouting hole to synchronously pressurize and heighten the heightening devices (3) until the heightening devices support the beam body and the supporting force does not exceed the weight of the beam body, and after the injected liquid materials are solidified, grouting blocking wires (3F) are packaged and marked;
b. after the upper bearing platform (5) and the embedded steel bars (12) on the lower bearing platform (6) are fixed through the connecting steel bars (11), the outer sides of the upper bearing platform (5) and the lower bearing platform (6) are protected;
c. when the bridge needs to be rotated, a fixing device between the upper bearing platform (5) and the lower bearing platform (6) and a protection device at the outer sides of the upper bearing platform (5) and the lower bearing platform (6) are removed;
d. cleaning the surfaces of all parts in the bridge rotation system;
e. checking whether the height adjusting device (3) can normally support the top beam or not, and if the height adjusting device (3) is damaged, additionally installing the height adjusting device (3) at the vacant point of the cushion stone (4);
f. determining the top beam load of the height adjusting device (3) according to the aging condition of the swivel support (1), if the swivel support (1) cannot be used, heating a grouting pore channel which is not marked, after the sealing paraffin is melted, uniformly increasing the height adjusting device (3) through the grouting pore channel until the upper spherical pendulum (1A) and the lower spherical pendulum (1B) are separated from each other up and down, and if the swivel support (1) can still realize the swivel function, not increasing the height adjusting device (3) any more to enable the height adjusting device (1) to bear part of the beam load;
g. re-anchoring the steel strand in the opposite direction, and connecting the steel strand with a synchronous jack arranged on a rotary counter-force seat (8) to test rotation;
h. formally revolving;
i. removing the steel strand, and fixing the embedded steel bars (12) on the upper bearing platform (5) and the lower bearing platform (6) of the swivel support (1) through the connecting steel bars (11); the outer sides of the upper bearing platform (5) and the lower bearing platform (6) are protected to complete rotation.
16. Use according to claim 15, characterised in that in step a the heightening device (3) is pressurized to its uniform pressure by means of a grouting tunnel.
17. The application of claim 15, wherein the step b is to weld the connecting bars (11) to the embedded bars (12) on the upper and lower bearing platforms (5, 6) in a crisscross manner.
18. The application of any one of claims 14 or 17, wherein the step b of protecting the outer sides of the upper and lower bearing platforms (5, 6) is to fix the connecting steel bars (11) with the embedded steel bars (12) on the upper and lower bearing platforms (5, 6), and then to pour the seal concrete (13) between the upper and lower bearing platforms (5, 6) outside the swivel support (1).
19. The application of claim 18, wherein the step B of protecting the outer sides of the upper bearing platform (5) and the lower bearing platform (6) comprises fixing the connecting steel bars (11) with the embedded steel bars (12) on the upper bearing platform (5) and the lower bearing platform (6), fixing the sealing coaming (1C) on the outer sides of the upper spherical pendulum (1A) and the lower spherical pendulum (1B) by a hoop, and pouring the sealing concrete (13) between the upper bearing platform (5) and the lower bearing platform (6) on the outer side of the swivel support (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202298.6A CN112227217A (en) | 2020-11-02 | 2020-11-02 | Bridge rotation system and application thereof in bridge rotation construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202298.6A CN112227217A (en) | 2020-11-02 | 2020-11-02 | Bridge rotation system and application thereof in bridge rotation construction |
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| Publication Number | Publication Date |
|---|---|
| CN112227217A true CN112227217A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011202298.6A Pending CN112227217A (en) | 2020-11-02 | 2020-11-02 | Bridge rotation system and application thereof in bridge rotation construction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813850A (en) * | 2021-03-10 | 2021-05-18 | 中铁二十局集团第六工程有限公司 | Construction method of swivel bridge in water-rich area |
| CN113756171A (en) * | 2021-08-30 | 2021-12-07 | 中铁第五勘察设计院集团有限公司 | Combined bridge reverse rotation device and bridge |
| CN114150573A (en) * | 2021-12-14 | 2022-03-08 | 柳州东方工程橡胶制品有限公司 | Bridge support capable of repeatedly adjusting height and operation method thereof |
| CN115821796A (en) * | 2022-11-29 | 2023-03-21 | 中铁大桥勘测设计院集团有限公司 | Use method of bridge turning device with detachable supporting feet and slide ways |
-
2020
- 2020-11-02 CN CN202011202298.6A patent/CN112227217A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813850A (en) * | 2021-03-10 | 2021-05-18 | 中铁二十局集团第六工程有限公司 | Construction method of swivel bridge in water-rich area |
| CN113756171A (en) * | 2021-08-30 | 2021-12-07 | 中铁第五勘察设计院集团有限公司 | Combined bridge reverse rotation device and bridge |
| CN114150573A (en) * | 2021-12-14 | 2022-03-08 | 柳州东方工程橡胶制品有限公司 | Bridge support capable of repeatedly adjusting height and operation method thereof |
| CN115821796A (en) * | 2022-11-29 | 2023-03-21 | 中铁大桥勘测设计院集团有限公司 | Use method of bridge turning device with detachable supporting feet and slide ways |
| CN115821796B (en) * | 2022-11-29 | 2024-03-19 | 中铁大桥勘测设计院集团有限公司 | Application method of bridge swivel device with detachable supporting feet and sliding ways |
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