CN110565539B - Swivel bridge with shock absorption and isolation functions and construction method thereof - Google Patents
Swivel bridge with shock absorption and isolation functions and construction method thereof Download PDFInfo
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- CN110565539B CN110565539B CN201910901395.5A CN201910901395A CN110565539B CN 110565539 B CN110565539 B CN 110565539B CN 201910901395 A CN201910901395 A CN 201910901395A CN 110565539 B CN110565539 B CN 110565539B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
- E01D19/046—Spherical bearings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/08—Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention provides a swivel bridge with a vibration reduction and isolation function, which comprises pile foundations, bridge piers and beam bodies, wherein an upper bearing platform and a lower bearing platform are arranged between the pile foundations and the bridge piers, the centers of the upper bearing platform and the lower bearing platform are connected through a spherical hinge, a plurality of vibration reduction structural members are arranged between the upper bearing platform and the lower bearing platform, the plurality of vibration reduction structural members are positioned outside the spherical hinge and are circumferentially and equidistantly arranged around the spherical hinge, a plurality of supporting feet are arranged at the bottom of the upper bearing platform along the circumferential direction of the bottom of the upper bearing platform, and the bottom of each supporting foot is detachably connected with the lower bearing platform through a rubber vibration isolation support. This bridge of turning has cancelled traditional encapsulation concrete construction, through increasing rubber shock insulation support under traditional bridge spike of turning, is equivalent to the bridge structure and forms the shock insulation layer down between the cushion cap, and when big earthquake, rubber shock insulation support can offset a large amount of seismic energy, increases shock attenuation structure between upper and lower cushion cap simultaneously to the seismic energy of a large amount of consumption entering structure, thereby reduce the seismic response of whole bridge structure by a wide margin, improve the shock resistance of structure greatly.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a swivel bridge with a shock absorption and isolation function and a construction method thereof.
Background
The bridge structure plays an important role in national economy development, promotion of cultural exchange, consolidation of national defense and the like; especially, when an earthquake happens, emergency help seeking is implemented, production is resumed after the disaster, and the smooth of a life trunk is ensured to occupy an important position, so the importance of earthquake resistance of the bridge structure is particularly important.
Along with the implementation of the 'eight longitudinal and eight transverse' road network of the high-speed railway in China, the construction of the highway and municipal engineering road network inevitably crosses the railway road network, and bridge engineering is needed to cross the high-speed railway to form the three-dimensional crossing. In bridge construction, the traditional bridge construction method comprises the following steps: the cradle construction method, the bracket cast-in-situ method, the pushing construction method and the like need to be constructed above a high-speed railway, and any small construction sundries fall onto a train running at a high speed in the construction process, so that serious safety accidents can be caused. Therefore, in order to ensure that bridge construction interferes with the existing high-speed railway, almost all bridges crossing the existing high-speed railway adopt a swivel construction method, and the principle is a construction method that the bridge is constructed outside a safety influence area of the high-speed railway first and then is quickly swiveled to be folded above the railway. The bridge adopting swivel construction is a swivel bridge, a rotating system is added to the bridge with a special structure, the rotating system is generally arranged in a bearing platform area, the bearing platform is divided into an upper bearing platform and a lower bearing platform, swivel spherical hinges, supporting feet and the like are arranged between the two bearing platforms, and a traction rope wound on the upper bearing platform is pulled by a jack, so that the upper bearing platform rotates by taking the spherical hinges as supporting points, and the rotation on the horizontal plane of the bridge is realized.
In the current method for reducing and isolating the shock of the large-span continuous beam bridge, a shock-absorbing support 4 is arranged at the top of a main pier of the bridge, and a damper is arranged between pier beams to reduce and isolate the shock, as shown in fig. 1. However, the measures are firstly complicated in construction, and particularly the bridge structure generally needs to be corrected after an earthquake, so that the bridge structure is restored to the original position, the correction construction is troublesome, the reinforcement bars of the middle pier are sometimes required to be additionally arranged for hard resistance, and the construction cost is high. The method for reducing and insulating the vibration of the pier bottoms of main piers such as continuous beams and the like has little literature record, particularly a swivel construction bridge, no special structure for reducing and insulating vibration by means of a swivel bridge rotating system exists at present, a traditional swivel bridge can utilize steel wedges to plug and firmly weld gaps between supporting feet and loops after a swivel is accurately positioned, and meanwhile, steel bars are welded with the steel bars pre-buried on an upper bearing platform and a lower bearing platform and filled with concrete to solidify the swivel joints, so that an integral bearing platform is formed.
Disclosure of Invention
The invention aims to solve the problems of poor shock resistance and complex construction of a shock absorption and isolation structure of a swivel bridge structure in the prior art.
The invention provides a swivel bridge with a vibration reduction and isolation function, which comprises pile foundations, piers and beam bodies which are sequentially arranged from bottom to top, wherein an upper bearing platform and a lower bearing platform are arranged between the pile foundations and the piers, the centers of the upper bearing platform and the lower bearing platform are connected through a spherical hinge, a plurality of vibration reduction structural members are arranged between the upper bearing platform and the lower bearing platform, the plurality of vibration reduction structural members are positioned outside the spherical hinge and are circumferentially and equidistantly arranged around the spherical hinge, a plurality of supporting feet are arranged at the bottom of the upper bearing platform along the circumference of the bottom of the upper bearing platform, and the bottom of each supporting foot is detachably connected with the lower bearing platform through a rubber vibration isolation support.
Further, the top of the lower bearing platform is of a groove structure, and the upper bearing platform is installed in the groove of the lower bearing platform.
Further, the lower bearing platform side edge and the upper bearing platform side edge are sealed through concrete blocks.
Further, a plurality of buffer rubber blocks which are symmetrically arranged at intervals are arranged between the side edge of the lower bearing platform and the side edge of the upper bearing platform.
Furthermore, a drainage pipeline for draining accumulated water in the groove of the lower bearing platform is embedded in the lower bearing platform.
Further, the spherical hinge comprises a spherical hinge concave spherical surface lower disc, a spherical hinge convex spherical surface upper disc and a central pin shaft, a smooth sliding surface is formed between the spherical hinge concave spherical surface lower disc and the spherical hinge convex spherical surface upper disc, the central holes of the spherical hinge concave spherical surface lower disc and the spherical hinge convex spherical surface upper disc are respectively provided with a rotating shaft sleeve, and the central pin shaft is detachably connected in the two rotating shaft sleeves.
Further, the damping structure is a viscous damping damper, the upper bearing platform and the lower bearing platform are symmetrically provided with embedded threaded steel bars, the viscous damping damper is arranged between the upper bearing platform and the lower bearing platform in a staggered and symmetrical mode, and nuts at two ends of the viscous damping damper are fixedly connected with the embedded threaded steel bars on the upper bearing platform and the lower bearing platform respectively.
Further, the rubber shock insulation support includes from top to bottom fixed connection's support upper junction plate, support main part and support lower junction plate in proper order, in the spike upper end part stretches into the cushion cap, with last cushion cap fixed connection, the spike stretches out the cushion cap part through the spike junction plate with the connection can be dismantled to support upper junction plate, pre-buried sleeve has been arranged on the cushion cap down, the support lower junction plate pass through the bolt with pre-buried sleeve fixed connection of cushion cap down.
Further, the swivel bridge with the shock absorption and isolation function further comprises bridge side piers arranged at the bottoms of the two ends of the beam body, and a connecting positioning piece used for limiting horizontal deflection of the beam body is arranged between the bridge side piers and the beam body.
In addition, the invention also provides a construction method of the swivel bridge with the shock absorption and isolation function, which comprises the following steps:
1) Constructing pile foundations and a lower bearing platform on two sides of an existing railway, and installing a spherical hinge in the center of the top surface of the lower bearing platform, wherein the spherical hinge comprises a spherical hinge concave spherical lower disc, a spherical hinge convex spherical upper disc and a central pin shaft, and the central holes of the spherical hinge concave spherical lower disc and the spherical hinge convex spherical upper disc are respectively provided with a rotating shaft sleeve;
2) Constructing an upper bearing platform above a spherical hinge convex spherical surface upper disc, embedding the spherical hinge convex spherical surface upper disc in the center of the bottom surface of the upper bearing platform, embedding supporting feet on the bottom surface of the upper bearing platform, wherein each supporting foot comprises an upper supporting foot section, a lower supporting foot section, a supporting foot connecting plate and a supporting foot running plate;
3) After the swivel is in place, the lower sections of the supporting legs are removed, the lower sections of the supporting legs are replaced by rubber shock insulation supports, the upper ends of the rubber shock insulation supports are detachably connected with the upper sections of the supporting legs, and the lower ends of the rubber shock insulation supports are fixed with a lower bearing platform;
4) Removing a central pin shaft on the spherical hinge, and removing central limit between the upper bearing platform and the lower bearing platform;
5) The damping structural members are arranged in the vertical gaps of the lower bearing platform and the upper bearing platform and symmetrically arranged around the circumference of the spherical hinge;
6) Installing buffer rubber blocks in a horizontal gap between the lower bearing platform and the upper bearing platform, wherein the buffer rubber blocks are circumferentially and equidistantly arranged around the upper bearing platform;
7) Pouring concrete blocks with certain thickness on the top surfaces of the upper bearing platform and the lower bearing platform so as to seal a gap between the upper bearing platform and the lower bearing platform;
8) And installing conventional swivel bridge auxiliary equipment to finish construction.
Compared with the prior art, the invention has the beneficial effects that:
(1) The swivel bridge with the shock absorption and isolation function provided by the invention utilizes the special structure of the swivel bridge rotating system, the traditional sealing concrete construction is canceled, the rubber shock insulation support is added under the traditional swivel bridge supporting feet, which is equivalent to the formation of a shock insulation layer between a bridge structure and a lower bearing platform, and the rubber shock insulation support can counteract a large amount of seismic energy in the case of large earthquake, and meanwhile, a shock absorption structural member is added between the upper bearing platform and the lower bearing platform, so that the seismic energy entering the structure is greatly consumed, thereby greatly reducing the seismic response of the whole bridge structure and greatly improving the shock resistance of the structure.
(2) The swivel bridge with the shock absorption and isolation function provided by the invention has the advantages that the central pin shaft of the spherical hinge is designed to be of a detachable structure, and after the swivel is completed, the central pin shaft can be taken out, so that the concave spherical surface lower disc of the spherical hinge and the convex spherical surface upper disc of the spherical hinge can move horizontally relatively in an earthquake, and the deflection of the bridge structure under the action of the earthquake can be automatically reset and centered by utilizing the spherical hinge, and the swivel bridge has an automatic deviation correction function.
(3) The swivel bridge with the shock absorption and isolation function can greatly reduce the earthquake response of the whole bridge structure by only adding the rubber shock absorption support and the shock absorption structural member, is convenient to construct, maintain and repair, requires less additional investment for improving the shock resistance, has low cost and convenient construction, and has strong market competitiveness.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a conventional shock absorbing bridge;
FIG. 2 is a schematic structural view of a swivel bridge with shock absorption and isolation functions according to the present invention;
FIG. 3 is a schematic view of the structure of the spherical hinge according to the present invention;
FIG. 4 is a schematic view of the structure of the temple of the present invention;
FIG. 5 is a schematic view of the structure of a rubber shock insulation support of the present invention;
FIG. 6 is a schematic diagram of the connection and installation of the rubber shock insulation support and the support leg in the invention;
FIG. 7 is a schematic view of the installation of the shock absorbing structure of the present invention;
Fig. 8 is a schematic view of a full bridge elevation of the swivel bridge of the invention.
Reference numerals illustrate: 1. pile foundation; 2. bridge piers; 3. a beam body; 4. a damping support; 5.a lower bearing platform; 6. a buffer rubber block; 7. a concrete block; 8. an upper bearing platform; 9. spherical hinge; 10. damping structural members; 11. supporting feet; 12. rubber shock insulation support; 13. a drainage pipe; 14. a spherical hinge concave spherical surface lower disc; 15. a spherical hinge convex spherical surface upper disc; 16. a rotating shaft sleeve; 17. a center pin; 18. positioning angle steel; 19. the upper section of the supporting leg; 20. a supporting foot connecting plate; 21. the lower section of the support leg; 22. a supporting foot walking plate; 23. a connecting plate is arranged on the support; 24. a holder body; 25. a lower connecting plate of the support; 26. embedding a sleeve; 27. pre-burying a threaded steel rod; 28. and connecting the positioning piece.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention; in the description of the present invention, unless otherwise indicated, the meaning of "a plurality", "a number" or "a plurality" is two or more.
As shown in fig. 2, this embodiment provides a swivel bridge with shock absorption and insulation function, including pile foundation 1, pier 2 and the roof beam body 3 that set gradually from bottom to top, be provided with upper cap 8 and lower cap 5 between pile foundation 1 and the pier 2, upper cap 8 and lower cap 5 center are connected through spherical hinge 9, be provided with a plurality of shock attenuation structure 10 between upper cap 8 and the lower cap 5, this a plurality of shock attenuation structure 10 are located the spherical hinge 9 outside, and around spherical hinge 9 circumference equidistant arrangement, upper cap 8 bottom is provided with a plurality of spike 11 along its circumference, spike 11 bottom through rubber shock insulation support 12 with lower cap 5 can dismantle and be connected. In this embodiment, the concrete sealing construction is not performed after the bridge swivel construction is completed, that is, the upper bearing platform 8 and the lower bearing platform 5 are not connected into a whole, a gap is reserved between the upper bearing platform 8 and the lower bearing platform 5 vertically, and a shock-absorbing structural member 10 is installed in the gap, so that in the normal use stage of the bridge, on one hand, the shock-absorbing structural member 10 can work together with the supporting feet 11 and the spherical hinge 9 to support the bridge structure, and on the other hand, when an earthquake occurs, the shock-absorbing structural member 10 can consume a large amount of earthquake energy entering the structure, thereby avoiding the damage of the bridge structure and achieving the purpose of improving the shock resistance of the bridge structure; meanwhile, the rubber shock insulation support 12 is added below the traditional swivel bridge support legs, which is equivalent to a shock insulation layer formed between the bridge structure and the lower bearing platform 5, and the rubber shock insulation support 12 can counteract a large amount of earthquake energy during a large earthquake, so that the purpose of reducing and insulating the shock of the bridge structure is further achieved.
In the thinned embodiment, the top of the lower bearing platform 5 is of a groove structure, the upper bearing platform 8 is arranged in the groove of the lower bearing platform 5, and in order to prevent rainwater, namely other sundries, from entering a gap between the upper bearing platform 8 and the lower bearing platform 5, the side edge of the lower bearing platform 5 and the side edge of the upper bearing platform 8 are sealed through the concrete block 7, meanwhile, the concrete block 7 can also play a constraint role on the plane direction of the bridge structure, and the bridge structure is ensured not to generate horizontal displacement in the normal use stage. Further preferably, as shown in fig. 2, a plurality of buffer rubber blocks 6 are symmetrically arranged between the side edges of the lower bearing platform 5 and the side edges of the upper bearing platform 8, the buffer rubber blocks 6 can be made into square blocks, when an earthquake occurs, the bridge structure has a certain buffer constraint function in the horizontal direction, the bridge structure is prevented from generating excessive horizontal displacement, and the upper bearing platform 8 and the lower bearing platform 5 are prevented from collision damage. In order to further ensure the durability of the bearing platform structure, the accumulated water in the grooves of the lower bearing platform 5 is prevented from corroding the steel structures such as the damping structural member 10, the swivel supporting feet 11 and the like, a drainage pipeline 13 for draining the accumulated water in the grooves of the lower bearing platform 5 is pre-buried on the lower bearing platform 5, and no rainwater accumulation between the upper bearing platform 8 and the lower bearing platform 5 is ensured.
As shown in fig. 3, the spherical hinge 9 includes a spherical hinge concave spherical lower disc 14, a spherical hinge convex spherical upper disc 15, and a central pin 17, smooth sliding surfaces are formed between the spherical hinge concave spherical lower disc 14 and the spherical hinge convex spherical upper disc 15, the central holes of the spherical hinge concave spherical lower disc 14 and the spherical hinge convex spherical upper disc 15 are respectively provided with a rotating shaft sleeve 16, the central pin 17 is detachably connected in the two rotating shaft sleeves 16, the spherical hinge convex spherical upper disc 15 can drive the upper bearing platform 8 and the upper bridge structure thereof to rotate around the central pin 17 by using smaller power, so as to realize a swivel, and after the swivel is finished, the central pin is left in place unlike a traditional swivel bridge, in this embodiment, the central pin 17 is taken out, so that the spherical hinge concave spherical lower disc 14 and the spherical hinge convex spherical upper disc 15 can move horizontally relatively, can be automatically centered by using spherical effects, the bridge structure can be automatically restored to the original position after the earthquake, and extra corrective measures are not needed. Further, in order to ensure the fixation of the spherical hinge concave spherical bottom plate 14, the spherical hinge concave spherical bottom plate 14 is fixed with the rotating shaft sleeve 16 thereof through the positioning angle steel 18, and the positioning angle steel 18 forms a triangular support with the spherical hinge concave spherical bottom plate 14 and the rotating shaft sleeve 16, so that the installation stability of the spherical hinge concave spherical bottom plate 14 is enhanced.
As shown in fig. 4, fig. 5 and fig. 6, the supporting leg 11 includes a supporting leg upper section 19, a supporting leg lower section 21, a supporting leg connecting plate 20 and a supporting leg walking plate 22, the supporting leg upper section 19 stretches into the upper bearing platform 8 and is fixedly connected with the upper bearing platform 8, the bottom of the supporting leg upper section 19 is detachably connected with the supporting leg lower section 21 through the supporting leg connecting plate 20, the bottom of the supporting leg lower section 21 is connected with the supporting leg walking plate 22, a certain interval is reserved between the supporting leg walking plate 22 and the lower bearing platform 5, and in this embodiment, the distance between the supporting leg walking plate 22 and the lower bearing platform 5 is kept to 20mm, so that the upper bearing platform 8 and the lower bearing platform 5 can be guaranteed to rotate relatively, and the supporting leg 11 can be guaranteed to fall to the ground in time when the beam body 3 is inclined, thereby playing a role of stabilizing. The rubber shock insulation support 12 includes from top to bottom fixed connection's support upper junction plate 23, support main part 24 and support lower junction plate 25 in proper order, and support upper junction plate 23 and support lower junction plate 25 are the entity connecting plate that has the bolt hole, and after turning, demolish the lower leg section 21, replace the lower leg section 21 for rubber shock insulation support 12, the spike upper segment 19 pass through spike connecting plate 20 with support upper junction plate 23 can dismantle the connection, support upper junction plate 23 and spike connecting plate 20's shape, size are close, can be connected with spike upper segment 19 through bolt, nut, form spike-rubber shock insulation support integrated configuration, be arranged pre-buried sleeve 26 on the lower cushion cap 5, support lower junction plate 25 has the bolt hole, can pass through bolt, nut with pre-buried sleeve 26 fixed connection of lower cushion cap 5.
As shown in fig. 7, the damping structural member 10 is a viscous damping damper, the upper and lower bearing platforms 8 and 5 are symmetrically provided with pre-buried threaded steel bars 27, the viscous damping damper is arranged between the upper and lower bearing platforms 8 and 5 in a cross symmetry manner, and nuts at two ends of the viscous damping damper are respectively fixedly connected with the pre-buried threaded steel bars 27 on the upper and lower bearing platforms 8 and 5, so that the high-strength pre-buried threaded steel bars 27 required to fix the viscous damping damper are not cut off during an earthquake. The viscous damping damper arranged between the upper bearing platform and the lower bearing platform can generate great damping due to the opposite side movement vibration of the upper bearing platform and the lower bearing platform during earthquake, and a great amount of earthquake energy entering the structure is consumed, so that the purpose of reducing and isolating the vibration of the bridge structure is achieved.
In this embodiment, the pile foundation 1 is the same as that of a traditional bridge, and is divided into a middle pier pile foundation and an edge pier pile foundation, and is respectively used for supporting a middle pier and an edge pier of the bridge. The pier 2 is the same with the pier of traditional bridge, divide into pier in the bridge and bridge side mound, support the roof beam body 3 on its upper portion together, be different from the pier top in the bridge of traditional shock attenuation bridge and set up shock attenuation support 4, this embodiment adopts pier in the bridge and the fixed mode of the roof beam body 3, rotates the cushion cap through the pier bottom in the bridge and forms shock mitigation system and reach the absorbing purpose. The beam body 3 is the same as the beam body of the traditional bridge, and the beam body 3 can be a traditional continuous beam, a T-shaped beam, a bridge which can be used for swivel construction such as a continuous Liang Gongqiao and short-tower cable-stayed bridge, and the like.
In addition, as shown in fig. 8, in order to avoid beam falling caused by relative horizontal displacement of the beam body during a major earthquake, a connecting and positioning member 28 for limiting the horizontal displacement of the beam body 3 is arranged between the bridge pier arranged at the bottom of two ends of the beam body 3 and the beam body 3, and the connecting and positioning member 28 not only allows a certain displacement of the beam body 3 structure, but also limits the displacement of the beam body 3 structure, such as a steel chain or a liquid viscous damper, so as to ensure free expansion and contraction during a normal operation state.
The construction method of the swivel bridge with the shock absorption and isolation function in the embodiment comprises the following specific processes:
(1) Pile foundation 1 and lower bearing platform 5 construction are carried out on two sides of the existing railway, spherical hinge 9 is installed in the center of the top surface of lower bearing platform 5, drainage pipeline 13, pre-buried threaded steel bars and pre-buried sleeve 26 are pre-buried in the construction process of lower bearing platform 5, and installation of later-stage buffering rubber block 6, rubber vibration isolation support 12 and damping structural member 10 is facilitated.
The spherical hinge 9 comprises a spherical hinge concave spherical lower disc 14, a spherical hinge convex spherical upper disc 15 and a central pin shaft 17, wherein the central holes of the spherical hinge concave spherical lower disc 14 and the spherical hinge convex spherical upper disc 15 are respectively provided with a rotating shaft sleeve 16, and the central pin shaft 17 is detachably connected in the two rotating shaft sleeves 16.
(2) Concrete is poured above the spherical hinge convex spherical surface upper disc 15 to form an upper bearing platform 8, the spherical hinge convex spherical surface upper disc 15 is pre-buried in the center of the bottom surface of the upper bearing platform 8, meanwhile, a supporting foot 11 is pre-buried in the bottom surface of the upper bearing platform 8, the supporting foot 11 comprises an upper supporting foot section 19, a lower supporting foot section 21, a supporting foot connecting plate 20 and a supporting foot running plate 22, the upper supporting foot section 19 stretches into the upper bearing platform 8, the bottom of the upper supporting foot section 19 is detachably connected with the lower supporting foot section 21 through the supporting foot connecting plate 20, the bottom of the lower supporting foot section 21 is connected with the supporting foot running plate 22, and a certain interval is reserved between the supporting foot running plate 22 and the lower bearing platform 5.
(3) And constructing the bridge pier 2 on the upper bearing platform 8, constructing a cantilever turning part of the beam body 3 at a position in front of turning, simultaneously erecting a mould on the lower bearing platform 5, performing secondary concrete pouring on the lower bearing platform 5, turning the beam body 3 around the spherical hinge 9, and folding the bridge structure to finish system conversion. Of course, before turning, the beam 3 needs to be subjected to weighing test and trial turning.
(4) After the swivel is in place, the lower support leg sections 21 are removed, the lower support leg sections 21 are replaced by the rubber vibration isolation supports 12, the upper ends of the rubber vibration isolation supports 12 are detachably connected with the upper support leg sections 19, and the lower ends of the rubber vibration isolation supports 12 are fixed with the lower bearing platform 5.
(5) And removing the central pin shaft 17 on the spherical hinge 9, and removing the central limit between the upper bearing platform 8 and the lower bearing platform 5.
(6) The damping structural members 10 are installed in the vertical gaps of the lower bearing platform 5 and the upper bearing platform 8, and the damping structural members 10 are symmetrically arranged around the spherical hinge 9, so that bolts and nuts for connecting the damping structural members 10 are required to have enough strength, and the damping structural members are not cut off during an earthquake.
(7) The buffer rubber blocks 6 are arranged in the horizontal gap between the lower bearing platform 5 and the upper bearing platform 8, and the buffer rubber blocks 6 are arranged at equal intervals around the upper bearing platform 8; the buffer rubber block 6 is used for buffering and absorbing the horizontal displacement of the upper bearing platform 8 during an earthquake, so that the upper bearing platform 8 can be prevented from being damaged by collision.
(8) Concrete blocks 7 with certain thickness are poured on the top surfaces of the upper bearing platform 8 and the lower bearing platform 5 so as to seal gaps between the upper bearing platform 8 and the lower bearing platform 5, ensure fixed limit of the bridge in a normal state and reduce rainwater and other sundries from entering the gaps of the upper bearing platform and the lower bearing platform.
(9) And installing conventional swivel bridge auxiliary equipment to finish construction.
In summary, the special structure of the rotating system of the swivel bridge is utilized, the traditional sealing concrete construction is canceled, the rubber shock insulation support is added below the traditional swivel bridge supporting feet, which is equivalent to the formation of a shock insulation layer between the bridge structure and the lower bearing platform, and the rubber shock insulation support can counteract a large amount of seismic energy in the case of heavy earthquake, and meanwhile, the shock absorption structural member is added between the upper bearing platform and the lower bearing platform, so that the seismic energy entering the structure is greatly consumed, thereby greatly reducing the seismic response of the whole bridge structure and greatly improving the shock resistance of the structure.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention.
Claims (8)
1. The utility model provides a bridge of turning with subtract shock insulation function, includes pile foundation, pier and the roof beam body that sets gradually by supreme down, its characterized in that: an upper bearing platform and a lower bearing platform are arranged between the pile foundation and the pier, the centers of the upper bearing platform and the lower bearing platform are connected through a spherical hinge, a plurality of damping structural members are arranged between the upper bearing platform and the lower bearing platform, the damping structural members are positioned at the outer side of the spherical hinge and are circumferentially and equidistantly arranged around the spherical hinge, a plurality of supporting feet are arranged at the bottom of the upper bearing platform along the circumferential direction of the upper bearing platform, and the bottom of each supporting foot is detachably connected with the lower bearing platform through a rubber damping support;
The spherical hinge comprises a spherical hinge concave spherical lower disc, a spherical hinge convex spherical upper disc and a central pin shaft, smooth sliding surfaces are formed between the spherical hinge concave spherical lower disc and the spherical hinge convex spherical upper disc, rotary shaft sleeves are arranged at central holes of the spherical hinge concave spherical lower disc and the spherical hinge convex spherical upper disc, and the central pin shaft is detachably connected in the two rotary shaft sleeves;
The support leg comprises an upper support leg section, a lower support leg section, a support leg connecting plate and a support leg walking plate, wherein the upper support leg section extends into the upper bearing platform and is fixedly connected with the upper bearing platform, the bottom of the upper support leg section is detachably connected with the lower support leg section through the support leg connecting plate, the bottom of the lower support leg section is connected with the support leg walking plate, and a certain interval is reserved between the support leg walking plate and the lower bearing platform; the rubber shock insulation support includes from top to bottom in proper order fixed connection's support upper junction plate, support main part and support lower junction plate, in the spike upper end part stretches into the cushion cap, with last cushion cap fixed connection, the spike stretches out the cushion cap part through the spike junction plate with the connection can be dismantled to support upper junction plate, pre-buried sleeve has been arranged on the cushion cap down, the support lower junction plate pass through the bolt with the pre-buried sleeve fixed connection of cushion cap down.
2. The swivel bridge with shock absorption and isolation as claimed in claim 1, wherein: the top of the lower bearing platform is of a groove structure, and the upper bearing platform is arranged in the groove of the lower bearing platform.
3. The swivel bridge with shock absorbing and isolating function as claimed in claim 2, wherein: the lower bearing platform side edge and the upper bearing platform side edge are sealed through concrete blocks.
4. The swivel bridge with shock absorbing and isolating function as claimed in claim 2, wherein: and a plurality of buffer rubber blocks which are symmetrically arranged at intervals are arranged between the side edge of the lower bearing platform and the side edge of the upper bearing platform.
5. The swivel bridge with shock absorbing and isolating function as claimed in claim 2, wherein: and a drainage pipeline for draining accumulated water in the groove of the lower bearing platform is embedded in the lower bearing platform.
6. The swivel bridge with shock absorption and isolation as claimed in claim 1, wherein: the damping structure is a viscous damping damper, pre-buried threaded steel bars are symmetrically arranged on the upper bearing platform and the lower bearing platform, the viscous damping damper is arranged between the upper bearing platform and the lower bearing platform in a crossed and symmetrical mode, and nuts at two ends of the viscous damping damper are fixedly connected with the pre-buried threaded steel bars on the upper bearing platform and the lower bearing platform respectively.
7. The swivel bridge with shock absorption and isolation as claimed in claim 1, wherein: the bridge pier comprises a beam body and is characterized by further comprising bridge side piers arranged at the bottoms of the two ends of the beam body, wherein a connecting positioning piece used for limiting the horizontal deflection of the beam body is arranged between the bridge side piers and the beam body.
8. The construction method of the swivel bridge with the shock absorption and isolation functions is characterized by comprising the following steps of:
1) Constructing pile foundations and a lower bearing platform on two sides of an existing railway, and installing a spherical hinge in the center of the top surface of the lower bearing platform, wherein the spherical hinge comprises a spherical hinge concave spherical lower disc, a spherical hinge convex spherical upper disc and a central pin shaft, and the central holes of the spherical hinge concave spherical lower disc and the spherical hinge convex spherical upper disc are respectively provided with a rotating shaft sleeve;
2) Constructing an upper bearing platform above a spherical hinge convex spherical surface upper disc, embedding the spherical hinge convex spherical surface upper disc in the center of the bottom surface of the upper bearing platform, embedding supporting feet on the bottom surface of the upper bearing platform, wherein each supporting foot comprises an upper supporting foot section, a lower supporting foot section, a supporting foot connecting plate and a supporting foot running plate;
3) After the swivel is in place, the lower sections of the supporting legs are removed, the lower sections of the supporting legs are replaced by rubber shock insulation supports, the upper ends of the rubber shock insulation supports are detachably connected with the upper sections of the supporting legs, and the lower ends of the rubber shock insulation supports are fixed with a lower bearing platform;
4) Removing a central pin shaft on the spherical hinge, and removing central limit between the upper bearing platform and the lower bearing platform;
5) The damping structural members are arranged in the vertical gaps of the lower bearing platform and the upper bearing platform and symmetrically arranged around the circumference of the spherical hinge;
6) Installing buffer rubber blocks in a horizontal gap between the lower bearing platform and the upper bearing platform, wherein the buffer rubber blocks are circumferentially and equidistantly arranged around the upper bearing platform;
7) Pouring concrete blocks with certain thickness on the top surfaces of the upper bearing platform and the lower bearing platform so as to seal a gap between the upper bearing platform and the lower bearing platform;
8) And installing conventional swivel bridge auxiliary equipment to finish construction.
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| CN113174989B (en) * | 2021-04-28 | 2022-11-18 | 同济大学 | Seismic isolation system and construction method of LNG liquid storage tank with separated inner and outer tanks |
| CN113668408B (en) * | 2021-08-24 | 2022-12-23 | 中铁工程设计咨询集团有限公司 | Self-falling beam rotating spherical hinge |
| CN114875949B (en) * | 2022-04-29 | 2023-01-10 | 中南大学 | A Pile Group Foundation Cap Used to Resist Two-way Horizontal Earthquake |
| CN115030220B (en) * | 2022-07-14 | 2023-09-19 | 中铁四院集团西南勘察设计有限公司 | Construction method for building earthquake-resistant structure by combining underground structure and viaduct |
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