CN113668368A - Plastic hinge area enlarged section assembled type swing pier and construction method thereof - Google Patents
Plastic hinge area enlarged section assembled type swing pier and construction method thereof Download PDFInfo
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- CN113668368A CN113668368A CN202111055134.XA CN202111055134A CN113668368A CN 113668368 A CN113668368 A CN 113668368A CN 202111055134 A CN202111055134 A CN 202111055134A CN 113668368 A CN113668368 A CN 113668368A
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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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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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
Abstract
The invention relates to an assembled swinging pier with an enlarged section in a plastic hinge area and a construction method thereof, wherein the assembled swinging pier comprises square prefabricated pier columns and bearing platforms with unequal sections; the pier column is assembled to this structure prefabrication is not the uniform cross section, and the prefabricated concatenation festival section of this structure adopts the joint splicing futilely, and the pier bottom festival section is for expanding the cross section and installing power consumption reinforcing bar group PVC reservation pore in expanding the cross section four sides at pier bottom plastic hinge vulnerable area promptly, and the prefabricated pier bottom festival section of assembling is connected through anchor assembly through unbonded power consumption reinforcing bar and prestressing tendons between the cushion cap, and pier bottom festival section and upper portion festival section utilize prestressing tendons unbonded form to connect. An annular rubber cushion layer is arranged on a contact surface between the enlarged part of the pier bottom segment and the bearing platform. The method can ensure that the pier has good energy consumption capability under the action of an earthquake, can effectively reduce the serious crushing of concrete in the plastic hinge area of the bottom section, and can realize the quick repair of the pier by replacing unbonded energy consumption reinforcing steel bars after the earthquake.
Description
Technical Field
The invention relates to an assembled swinging pier with an enlarged section in a plastic hinge area and a construction method thereof, and belongs to the technical field of prefabricated bridge structures.
Background
In recent years, earthquake frequently occurs in China, and earthquake disasters pose serious threats to bridge safety. The conventional bridge usually utilizes the cracking and crushing of concrete in the plastic hinge area at the tail end of a pier and the yielding of reinforcing steel bars to dissipate the earthquake energy input into a structure. The bridge pier is used as an important component of a bridge structure, and once damaged, the stability and the normal use function of the bridge are seriously influenced, so that the seismic performance of the bridge pier is an important factor influencing the safety of the whole bridge structure. With the development of bridge structures, the traditional earthquake-resistant design method lacks attention to the using function of the bridge after earthquake, a plastic hinge area of a pier damaged in the earthquake is possibly difficult to repair or needs to be repaired for a long time, and the bridge with a seriously damaged part after the earthquake is also possibly dismantled due to incapability of repairing or uneconomical repair, so that huge economic loss is caused, and obstacles are brought to the recovery of the traffic function of a disaster area.
In order to achieve the purpose of rapidly recovering the normal use function of the bridge after strong earthquake, the application of the self-resetting swinging bridge pier structure in the field of bridge engineering is concerned by a plurality of scholars. Even if the self-resetting swinging structure undergoes large deformation under the action of strong shock, the swinging of the structure can be used for dissipating seismic energy, and the self-restoring force of the structure can eliminate residual displacement and can restore the original use function of the structure through quick restoration. However, the swing structure has poor energy dissipation capability due to small damage, so the swing structure usually needs an additional energy dissipation device which can be conveniently replaced after the swing structure shakes, and the energy dissipation capability of the structure is further compensated. At present, the swing pier has a complex structure, the on-site construction difficulty is high, the energy consumption device is not easy to replace, and the repairability and the long-term use performance of the energy consumption device are still to be improved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an assembled swinging pier with an enlarged section in a plastic hinge area and a construction method thereof, which are used for solving the problems of self-resetting, energy consumption and quick recovery of the anti-seismic performance of a bridge after strong earthquake.
In order to solve the problems, the invention adopts the following technical scheme:
the plastic hinge area enlarged section assembled type swing pier comprises a bearing platform, wherein a prefabricated assembled pier bottom section and a prefabricated assembled pier upper section are sequentially arranged on the bearing platform; a rubber cushion layer is arranged between the bearing platform and the bottom section of the prefabricated assembled pier; the prefabricated assembly pier bottom section is in a convex shape and comprises an expanded section of a plastic hinge area of the prefabricated assembly pier bottom section at the bottom and an upper section of the prefabricated assembly pier bottom section in the middle; the upper section of the prefabricated assembled pier is in an inverted convex shape; the bearing platform, the upper section of the prefabricated assembled pier bottom section in the middle of the prefabricated assembled pier bottom section and the middle of the prefabricated assembled pier upper section are vertically and correspondingly provided with a PVC reserved pore channel for penetrating prestressed steel bars and connecting the bearing platform, the prefabricated assembled pier bottom section and the prefabricated assembled pier upper section into a whole in an unbonded anchoring manner, and the bottom and the top of each prestressed steel bar are respectively provided with a prestressed steel bar fixed end anchorage and a prestressed steel bar tensioning end anchorage; in addition, a plurality of PVC reserved pore channels are correspondingly arranged on the expanding section of the plastic hinge area at the bottom of the prefabricated assembly pier bottom section and the bearing platform and used for penetrating the energy consumption reinforcing steel bar group and connecting the expanding section of the plastic hinge area at the bottom of the prefabricated assembly pier bottom section and the bearing platform into a whole without bonding, and the top and the bottom of the energy consumption reinforcing steel bar group are respectively provided with an energy consumption reinforcing steel bar group top nut and a self-locking one-way bolt anchoring end; grooves are formed in the bottom of the bearing platform and the top of the upper section of the prefabricated assembled pier, and a first square steel base plate and a second square steel base plate are arranged in the grooves respectively; the prestressed reinforcement fixed end anchorage and the prestressed reinforcement tensioning end anchorage are respectively arranged on the outer sides of the first square steel base plate and the second square steel base plate and are used for tensioning and anchoring through a jack; and an annular steel base plate is laid at the top of the enlarged section of the plastic hinge area of the section at the bottom of the prefabricated assembled pier, and the nut at the top end of the energy-consuming reinforcement group is fixed on the annular steel base plate in a twisting manner.
Furthermore, the expanded section size of the plastic hinge area of the bottom section of the prefabricated assembled pier is larger than the section size of the upper part of the bottom section of the middle prefabricated assembled pier, and the section size of the upper part of the bottom section of the middle prefabricated assembled pier is equal to the size of the bottom of the upper section of the prefabricated assembled pier.
Furthermore, the top of the enlarged section of the plastic hinge area of the bottom section of the prefabricated assembled pier is also provided with a protective cover for preventing rainwater from permeating.
Furthermore, the protective cover is in a frustum shape, and the protective cover is sleeved on the section of the upper part of the bottom section of the prefabricated assembly pier in the middle.
Furthermore, the cross sections of the bearing platform, the prefabricated assembled pier bottom section and the prefabricated assembled pier upper section are square.
Furthermore, the rubber cushion layer is annular, and its annular area with the area of the prefabricated pier bottom section of assembling section plastic hinge district enlarged cross section is the same, the rubber cushion layer lay the cushion cap with the prefabricated pier bottom section of assembling section plastic hinge district enlarged cross section's contact surface department for reduce pier bottom contact rigidity, when the pier takes place to sway under the strong earthquake effect, can reduce bottom pier concrete local damage, play dissipation part seismic energy effect.
Furthermore, the thicknesses of the first square steel backing plate, the annular steel backing plate and the second square steel backing plate are 5-20mm, and the first square steel backing plate, the annular steel backing plate and the second square steel backing plate are used for preventing the concrete contact surface of the assembled member from being damaged in the anchoring process.
Furthermore, the sizes of the first square steel cushion plate and the second square steel cushion plate are respectively the same as the sizes of the grooves at the bottom of the bearing platform and the top of the upper section of the prefabricated assembled pier.
Furthermore, a plurality of PVC preformed hole channels and energy dissipation steel bar groups penetrating through the PVC preformed hole channels are arranged at equal intervals and symmetrically.
The construction method of the plastic hinge area enlarged section assembled type swinging pier comprises the following steps:
the method comprises the following steps: and (3) bearing platform construction: binding a bearing platform reinforcing steel bar to form a reinforcing steel bar net, binding a local encrypted reinforcing steel bar, fixing a first square steel backing plate at the bottom of a bearing platform according to design requirements, embedding a PVC pipeline in a PVC reserved hole channel, ensuring the correct positions of an energy consumption reinforcing steel bar group, the first square steel backing plate and the PVC pipeline, and pouring bearing platform concrete;
step two: prefabricating a pier body: pouring of a prefabricated assembly pier bottom section and a prefabricated assembly pier upper section is completed in a component processing field, the prefabricated assembly pier bottom section is designed to be in a convex shape, PVC reserved channels are arranged on the plastic hinge area enlarged section of the prefabricated assembly pier bottom section and the prefabricated assembly pier bottom section upper section, and the PVC reserved channels are arranged in the center of the prefabricated assembly pier upper section;
step three: hoisting the prefabricated assembly pier bottom segment and the prefabricated assembly pier upper segment: the rubber cushion layer is arranged at a specified position of the top surface of the bearing platform, the bottom sections of the prefabricated assembled piers are arranged on the bearing platform at an aligned position, the upper sections of the prefabricated assembled piers are hoisted to the bottom sections of the prefabricated assembled piers, the annular steel base plate is laid at the upper part of the expanded section of the plastic hinge area of the bottom sections of the prefabricated assembled piers, the second square steel base plate is laid at the groove position of the top of the upper sections of the prefabricated assembled piers, and the hoisting process needs to ensure that all reserved PVC reserved channels of the integral prefabricated assembled structure and openings of the corresponding steel base plates are on the same vertical line;
step four: connecting the prefabricated assembled pier sections: connecting the prefabricated assembled pier body with a bearing platform through prestressed reinforcement anchoring, wherein the prestressed reinforcement passes through the PVC reserved hole, a prestressed reinforcement fixed-end anchorage device is installed at a groove at the bottom of the bearing platform, a prestressed reinforcement tensioning end anchorage device is installed on a second square steel base plate paved at the top end of the upper section of the prefabricated assembled pier, and the prestressed reinforcement is tensioned and anchored by using a jack; the energy-consuming steel bar group is anchored and installed through PVC reserved channels arranged around the expanded section of the section plastic hinge area at the bottom of the prefabricated assembly pier, the bottom end of the energy-consuming steel bar group is fixed at a groove at the bottom of the bearing platform and anchored by adopting a self-locking one-way bolt anchoring end, and the top end of the energy-consuming steel bar group is twisted and fixed on the annular steel base plate paved on the expanded section of the section plastic hinge area at the bottom of the prefabricated assembly pier by utilizing a nut at the top end of the energy-consuming steel bar group;
step five: after the construction of the connection structures between the prefabricated assembled pier bottom segment and the prefabricated assembled pier upper segment and the bearing platform is completed, a protective cover is additionally arranged at the top end of the energy consumption reinforcing steel bar group, and finally the integral installation of the assembled swinging pier with the plastic hinge area expanded section is completed.
The invention achieves the following technical effects:
1) the construction is simple and convenient: the prefabricated assembled structural components are used, the prefabricated assembled pier components are connected in a dry joint assembling mode, the prefabricated assembled pier components are connected into a whole through the prestressed tendon groups, pouring connection of the prefabricated assembled components is not needed in a construction site, the construction process is simple, the construction quality is improved, the construction speed is accelerated, and the environmental pollution is reduced.
2) The cost is saved: the energy-consuming steel bars with relatively low price can reduce the construction and repair cost, the design and installation processes of the prefabricated assembled pier parts are simple, the maintenance operation of the bridge is reduced, and the installation and maintenance cost is reduced.
3) The durability is high: compared with the traditional cast-in-place concrete component, the prefabricated assembled pier component has better durability; the energy-consuming reinforcing steel bars are subjected to rust prevention treatment, and a protective cover is additionally arranged at the top of the energy-consuming reinforcing steel bar group, so that rainwater is prevented from permeating, and the durability of the energy-consuming reinforcing steel bars in the using process is ensured.
4) Self-resetting property: the self-resetting of the bridge structure after the earthquake action is realized by utilizing the tension force, the self-weight and the second-stage constant load of the prestressed reinforcement, so that the residual deformation of the bridge structure after the earthquake is eliminated or reduced, the annular rubber cushion layer is paved between the expanded part of the plastic hinge area of the section at the bottom of the prefabricated assembled bridge pier and the bearing platform, the contact rigidity at the bottom of the bridge pier can be effectively reduced, the seismic energy dissipated by the swinging of the bridge pier is enabled, the local damage of the concrete at the bottom of the bridge pier is reduced, and most of the seismic energy is dissipated by the yielding of the energy dissipation reinforcement.
5) Easy repairability: after an earthquake occurs, the energy dissipation reinforcing steel bars which are yielded can be quickly replaced after the earthquake, the protective cover is opened, the energy dissipation reinforcing steel bar group with the yield damage in the PVC pipe is taken out by the aid of the electric spark machine, new energy dissipation reinforcing steel bars are installed, the replacement process does not affect the normal use of the bridge, and the original anti-seismic performance of the bridge can be timely restored after the earthquake occurs.
Drawings
For a clearer explanation of the solution of the invention, the following brief description of the drawings required for this solution is given:
fig. 1 is a front view of an assembled type rocking pier with an enlarged cross section of a plastic hinge region according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a plan view of the platform of the present invention;
FIG. 4 is a plan view of a prefabricated pier foundation section of the present invention;
fig. 5 is a plan view of a segment of a prefabricated upper pier according to the present invention.
Detailed Description
The invention will be further described with reference to fig. 1-5.
As shown in fig. 1 to 5, the plastic hinge region enlarged section assembled type swinging pier comprises a bearing platform 1, wherein a prefabricated assembled pier bottom section 3 and a prefabricated assembled pier upper section 4 are sequentially arranged on the bearing platform 1. And a rubber cushion layer 2 is arranged between the bearing platform 1 and the prefabricated assembly pier bottom section 3. The prefabricated assembly pier bottom section 3 is in a convex shape and comprises a plastic hinge area expanding section 3-1 of the prefabricated assembly pier bottom section at the bottom and an upper section 3-2 of the prefabricated assembly pier bottom section in the middle. The upper segment 4 of the prefabricated assembled pier is in an inverted convex shape. The bearing platform 1, the prefabricated assembled pier bottom section 3 middle prefabricated assembled pier bottom section upper section 3-2 and the prefabricated assembled pier upper section 4 middle prefabricated assembled pier bottom section are vertically and correspondingly provided with a PVC reserved hole 7 for penetrating a prestressed reinforcement 5, the bearing platform 1, the prefabricated assembled pier bottom section 3 and the prefabricated assembled pier upper section 4 are connected into a whole in an unbonded anchoring mode, and the bottom and the top of the prestressed reinforcement 5 are respectively provided with a prestressed reinforcement fixed end anchorage device 5-1 and a prestressed reinforcement tensioning end anchorage device 5-2. In addition, a plurality of PVC reserved holes 7 are correspondingly arranged on the plastic hinge area expanding section 3-1 at the bottom of the prefabricated assembly pier bottom section 3 and the bearing platform 1 and are used for penetrating the energy consumption reinforcing steel bar group 6 and connecting the plastic hinge area expanding section 3-1 at the bottom of the prefabricated assembly pier bottom section and the bearing platform 1 into a whole without bonding, and the top and the bottom of the energy consumption reinforcing steel bar group 6 are respectively provided with an energy consumption reinforcing steel bar group top end nut 6-1 and a self-locking one-way bolt anchoring end 6-2. In this embodiment, the plurality of PVC preformed holes 7 and the energy dissipation reinforcement groups 6 penetrating therethrough are arranged at equal intervals and symmetrically.
Grooves are formed in the bottom of the bearing platform 1 and the top of the upper section 4 of the prefabricated assembled pier, and a first square steel base plate 8-1 and a second square steel base plate 8-3 are arranged in the grooves respectively. The prestressed reinforcement fixed end anchorage device 5-1 and the prestressed reinforcement tensioning end anchorage device 5-2 are respectively arranged on the outer sides of the first square steel base plate 8-1 and the second square steel base plate 8-3 and are used for tensioning and anchoring through a jack. An annular steel backing plate 8-2 is further laid on the top of the expanded section 3-1 of the plastic hinge area of the bottom section of the prefabricated assembled pier, and the nut 6-1 at the top end of the energy dissipation steel bar group is fixed on the annular steel backing plate 8-2 in a twisting mode. The thicknesses of the first square steel base plate 8-1, the annular steel base plate 8-2 and the second square steel base plate 8-3 are 5-20mm, and the first square steel base plate, the annular steel base plate and the second square steel base plate are used for preventing the concrete contact surface of the assembled member from being damaged in the anchoring process. In addition, the sizes of the first square steel base plate 8-1 and the second square steel base plate 8-3 are respectively the same as the sizes of grooves at the bottom of the bearing platform 1 and the top of the upper section 4 of the prefabricated assembly pier.
As shown in fig. 4, the size of the expanded section 3-1 of the plastic hinge area of the bottom section of the prefabricated assembly pier is larger than that of the section 3-2 of the upper section of the bottom section of the middle prefabricated assembly pier. The size of the upper section 3-2 of the middle prefabricated assembly pier bottom section is equal to the size of the bottom of the prefabricated assembly pier upper section 4, the prefabricated assembly pier bottom section is hung on the prefabricated assembly pier bottom section 3, the PVC reserved hole 7 of the prefabricated assembly pier bottom section is enabled to be in the same straight line with the bearing platform 1 and the reserved hole 7 of the prefabricated assembly pier bottom section 3, the prestressed reinforcement 5 is guaranteed to be capable of passing through the reserved PVC reserved hole 7 without obstacles, unbonded anchoring connection is achieved, and all sections of the prefabricated assembly pier are connected into an integral structure.
As shown in fig. 1, a protective cover 9 is further arranged on the top of the enlarged section 3-1 of the plastic hinge region of the bottom section of the prefabricated assembly pier for preventing rainwater from permeating. The protective cover 9 is in a frustum shape, and the middle of the protective cover is sleeved on the section 3-2 of the upper part of the bottom section of the prefabricated assembly pier.
As shown in fig. 2 to 5, the cross sections of the bearing platform 1, the prefabricated assembled pier bottom segment 3 and the prefabricated assembled pier upper segment 4 are square. The rubber cushion layer 2 is annular, the annular area of the rubber cushion layer is the same as the area of the enlarged section 3-1 of the section plastic hinge area at the bottom of the prefabricated assembled pier, the rubber cushion layer 2 is paved at the contact surface of the bearing platform 1 and the enlarged section 3-1 of the section plastic hinge area at the bottom of the prefabricated assembled pier and used for reducing the contact rigidity of the bottom of the pier, and when the pier swings under the action of strong shock, the local damage of the concrete of the bottom pier can be reduced, and the effect of dissipating part of seismic energy is achieved.
The working principle is as follows:
under the normal use state, the section of the plastic hinge area at the bottom of the prefabricated assembled pier bottom section 3 is enlarged, the rigidity of the bridge structure under the normal use state can be ensured, and the bridge can be ensured not to swing under the condition of slight disturbance due to the self weight of the upper structure and the constraint force action of the prestressed reinforcement 5, so that the stability of the pier is maintained.
When the small earthquake takes place, because prestressing reinforcement 5 connects the prefabricated pier structure of swaying of assembling through the unbonded connection and connects into whole, guarantee the wholeness of pier to superstructure's dead weight makes bridge structures can maintain stably.
When a medium or large earthquake occurs, the bearing platform 1, the prefabricated assembly pier bottom section 3 and the prefabricated assembly pier upper section 4 are in dry joint connection, so that the pier structure can swing under the action of the earthquake force. The rubber cushion layer 2 is laid at the contact surface of the enlarged section 3-1 of the prefabricated assembled pier bottom section plastic hinge area and the bearing platform 1, the rubber cushion layer is in an annular design, the contact rigidity of the bottom of the pier is reduced, the pier can better swing, the rubber cushion layer 2 is extruded at the bottom end of the prefabricated assembled pier bottom section 3 in the swinging process of the pier, the local damage of the concrete of the bottom section of the pier is reduced, when the pier inclines, the energy dissipation steel bar group 6 connecting the bearing platform 1 and the prefabricated assembled pier bottom section 3 plays a role, and most of seismic energy can be dissipated. Due to the gravity of the upper structure of the bridge and the restoring force provided by the prestressed reinforcement 5, the structure has strong self-resetting capability. Due to the connection effect of the prestressed reinforcement 5, the swing amplitude of the structure is controllable, and the energy dissipation and shock absorption purposes are achieved through the swing of the pier. After the earthquake, the energy consumption steel bar group 6 after yielding can be quickly replaced, and the bridge is ensured to be restored to a normal use state.
The construction method of the plastic hinge area enlarged section assembled type swinging pier comprises the following steps:
the method comprises the following steps: construction of a bearing platform 1: binding reinforcing steel bars of a bearing platform 1 to form a reinforcing steel bar net, binding partially-encrypted reinforcing steel bars, fixing a first square steel base plate 8-1 at a groove at the bottom of the bearing platform 1 according to design requirements, pre-embedding PVC pipelines in a PVC reserved hole 7, ensuring the correct positions of an energy consumption reinforcing steel bar group 6, the first square steel base plate 8-1 and the PVC pipelines, and pouring concrete of the bearing platform 1.
Step two: prefabricating a pier body: pouring of the prefabricated assembly pier bottom sections 3 and the prefabricated assembly pier upper sections 4 is completed in a component processing field, the prefabricated assembly pier bottom sections 3 are designed to be in a convex shape, PVC reserved channels 7 are arranged at the positions of the plastic hinge area expanding sections 3-1 of the prefabricated assembly pier bottom sections and the upper sections 3-2 of the prefabricated assembly pier bottom sections, and the PVC reserved channels 7 are arranged at the centers of the prefabricated assembly pier upper sections 4.
Step three: hoisting the prefabricated assembly pier bottom segment 3 and the prefabricated assembly pier upper segment 4: the method comprises the steps of installing a rubber cushion layer 2 to a specified position of the top surface of a bearing platform 1, installing a prefabricated assembly pier bottom section 3 to the bearing platform 1 in an aligned position, hoisting a prefabricated assembly pier upper section 4 to the prefabricated assembly pier bottom section 3, paving an annular steel base plate 8-2 at the upper part of an enlarged section 3-1 of a plastic hinge area of the prefabricated assembly pier bottom section, paving a second square steel base plate 8-3 at a groove position of the top of the prefabricated assembly pier upper section 4, and ensuring that all reserved PVC reserved channels 7 of an integral prefabricated assembly structure and openings of corresponding steel base plates are on the same vertical line in the hoisting process.
Step four: connecting the prefabricated assembled pier sections: the prefabricated assembled pier body is connected with the bearing platform through prestressed reinforcement 5 anchoring, the prestressed reinforcement 5 is provided with a prestressed reinforcement fixed-end anchorage device 5-1 at the groove at the bottom of the bearing platform 1 through a PVC reserved hole 7, a prestressed reinforcement tensioning end anchorage device 5-2 is arranged on a second square steel base plate 8-3 laid at the top end of the upper section 4 of the prefabricated assembled pier, and tensioning and anchoring of the prestressed reinforcement 5 are realized by using a jack. The energy-consuming reinforcement group 6 is anchored and installed through PVC reserved hole channels 7 arranged around the expanded section 3-1 of the section plastic hinge area at the bottom of the prefabricated assembly pier, the bottom end of the energy-consuming reinforcement group is fixed at a groove at the bottom of the bearing platform 1, the energy-consuming reinforcement group is anchored by adopting a self-locking one-way bolt anchoring end 6-2, and the top end of the energy-consuming reinforcement group is fixed on an annular steel base plate 8-2 laid on the expanded section 3-1 of the section plastic hinge area at the bottom of the prefabricated assembly pier by utilizing a nut 6-1 at the top end of the energy-consuming reinforcement group in a twisting mode.
Step five: after the construction of the connection structures between the prefabricated assembled pier bottom section 3, the prefabricated assembled pier upper section 4 and the bearing platform 1 is completed, the protective cover 9 is additionally arranged at the top end of the energy consumption reinforcing steel bar group 6, and finally the integral installation of the assembled swinging pier with the section enlarged by the plastic hinge area is completed.
In conclusion, although the embodiments of the present invention have been described, it should be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principles and spirit of the present invention.
Claims (10)
1. The utility model provides a pier is swayd to plastics hinge district enlarged cross section assembled, includes cushion cap (1), its characterized in that: the bearing platform (1) is sequentially provided with a prefabricated assembly pier bottom section (3) and a prefabricated assembly pier upper section (4); a rubber cushion layer (2) is arranged between the bearing platform (1) and the prefabricated assembly pier bottom segment (3); the prefabricated assembly pier bottom section (3) is in a convex shape and comprises a plastic hinge area expanding section (3-1) of the prefabricated assembly pier bottom section at the bottom and an upper section (3-2) of the prefabricated assembly pier bottom section in the middle; the upper section (4) of the prefabricated assembled pier is in an inverted convex shape; the bearing platform (1), the upper section (3-2) of the prefabricated assembly pier bottom section in the middle of the prefabricated assembly pier bottom section (3) and the middle of the prefabricated assembly pier upper section (4) are vertically and correspondingly provided with a PVC reserved hole (7) for penetrating a prestressed steel bar (5) so as to integrally anchor the bearing platform (1), the prefabricated assembly pier bottom section (3) and the prefabricated assembly pier upper section (4) in an unbonded manner, and the bottom and the top of the prestressed steel bar (5) are respectively provided with a prestressed steel bar fixed end anchorage device (5-1) and a prestressed steel bar tensioning end anchorage device (5-2); in addition, a plurality of PVC reserved hole channels (7) are correspondingly arranged on the plastic hinge area expanding section (3-1) of the bottom section of the prefabricated assembled pier at the bottom of the section (3) of the bottom of the prefabricated assembled pier and the bearing platform (1) and are used for penetrating the energy consumption steel bar group (6) so as to connect the plastic hinge area expanding section (3-1) of the section of the bottom of the prefabricated assembled pier and the bearing platform (1) into a whole without bonding, and the top and the bottom of the energy consumption steel bar group (6) are respectively provided with an energy consumption steel bar group top nut (6-1) and a self-locking one-way bolt anchoring end (6-2); grooves are formed in the bottom of the bearing platform (1) and the top of the upper section (4) of the prefabricated and assembled pier, and a first square steel base plate (8-1) and a second square steel base plate (8-3) are arranged in the grooves respectively; the prestressed reinforcement fixed end anchorage device (5-1) and the prestressed reinforcement tensioning end anchorage device (5-2) are respectively arranged on the outer sides of the first square steel base plate (8-1) and the second square steel base plate (8-3) and are used for tensioning and anchoring through a jack; an annular steel backing plate (8-2) is further laid on the top of the plastic hinge area expanding section (3-1) of the prefabricated assembly pier bottom section, and the energy consumption reinforcement group top end nut (6-1) is fixed on the annular steel backing plate (8-2) in a twisting mode.
2. The plastic hinge area enlarged section fabricated type rocking pier according to claim 1, wherein: the size of the plastic hinge area enlarged section (3-1) of the bottom section of the prefabricated assembled pier is larger than that of the upper section (3-2) of the bottom section of the middle prefabricated assembled pier, and the size of the upper section (3-2) of the bottom section of the middle prefabricated assembled pier is equal to that of the bottom section (4) of the upper section of the prefabricated assembled pier.
3. The plastic hinge area enlarged section fabricated type rocking pier according to claim 2, wherein: the top of the plastic hinge area expanding section (3-1) of the bottom section of the prefabricated assembled pier is also provided with a protective cover (9) for preventing rainwater from permeating.
4. The plastic hinge area enlarged section fabricated type rocking pier according to claim 3, wherein: the protective cover (9) is in a frustum shape, and is sleeved on the section (3-2) at the upper part of the bottom section of the prefabricated assembly pier in the middle.
5. The plastic hinge area enlarged section fabricated type rocking pier according to claim 3, wherein: the cross sections of the bearing platform (1), the prefabricated assembly pier bottom section (3) and the prefabricated assembly pier upper section (4) are square.
6. The plastic hinge area enlarged section fabricated type rocking pier according to claim 5, wherein: rubber cushion (2) are the annular, its annular area with the area of pier bottom section plastics hinge district enlarged section (3-1) is assembled in the prefabrication is the same, rubber cushion (2) are laid cushion cap (1) with the contact surface department of pier bottom section plastics hinge district enlarged section (3-1) is assembled in the prefabrication for reduce pier bottom contact rigidity, when the pier takes place to sway under the macroseism effect, can reduce bottom pier concrete local damage, play dissipation part seismic energy effect.
7. The plastic hinge area enlarged section fabricated type rocking pier according to claim 6, wherein: the thicknesses of the first square steel base plate (8-1), the annular steel base plate (8-2) and the second square steel base plate (8-3) are 5-20mm, and the first square steel base plate, the annular steel base plate and the second square steel base plate are used for preventing the concrete contact surface of the assembled member from being damaged in the anchoring process.
8. The plastic hinge area enlarged section fabricated type rocking pier according to claim 7, wherein: the sizes of the first square steel base plate (8-1) and the second square steel base plate (8-3) are respectively the same as the sizes of the grooves at the bottom of the bearing platform (1) and the top of the upper segment (4) of the prefabricated assembled pier.
9. The plastic hinge area enlarged section fabricated type rocking pier according to claim 8, wherein: the PVC reserved hole channels (7) and the energy consumption steel bar groups (6) penetrating through the PVC reserved hole channels are arranged at equal intervals and symmetrically.
10. A construction method of an assembly type rocking pier with an enlarged cross section by plastic hinge region according to claim 9, comprising the steps of:
the method comprises the following steps: construction of the bearing platform (1): binding reinforcing steel bars of a bearing platform (1), manufacturing a reinforcing steel bar net, binding partially-encrypted reinforcing steel bars, fixing a first square steel base plate (8-1) in a groove at the bottom of the bearing platform (1) according to design requirements, pre-embedding PVC (polyvinyl chloride) pipelines in a PVC reserved hole channel (7), ensuring the correct positions of an energy-consuming reinforcing steel bar group (6), the first square steel base plate (8-1) and the PVC pipelines, and pouring concrete of the bearing platform (1);
step two: prefabricating a pier body: pouring of a prefabricated assembly pier bottom section (3) and a prefabricated assembly pier upper section (4) is completed in a component processing field, the prefabricated assembly pier bottom section (3) is designed to be in a convex shape, a PVC reserved hole channel (7) is arranged at the position of an enlarged section (3-1) of the prefabricated assembly pier bottom section plastic hinge area and the position of the prefabricated assembly pier bottom section upper section (3-2), and a PVC reserved hole channel (7) is arranged at the center of the prefabricated assembly pier upper section (4);
step three: hoisting the prefabricated assembly pier bottom segment (3) and the prefabricated assembly pier upper segment (4): the method comprises the following steps of installing a rubber cushion layer (2) at a specified position of the top surface of a bearing platform (1), installing the bottom section (3) of the prefabricated assembled pier at an aligned position on the bearing platform (1), hoisting the upper section (4) of the prefabricated assembled pier to the bottom section (3) of the prefabricated assembled pier, paving an annular steel base plate (8-2) at the upper part of an expanded section (3-1) of a plastic hinge area of the bottom section of the prefabricated assembled pier, paving a second square steel base plate (8-3) at a groove position at the top of the upper section (4) of the prefabricated assembled pier, and ensuring that all reserved PVC reserved channels (7) of the integral prefabricated assembled structure and openings of the corresponding steel base plates are on the same vertical line in the hoisting process;
step four: connecting the prefabricated assembled pier sections: connecting the prefabricated pier body and the bearing platform by anchoring prestressed reinforcements (5), wherein the prestressed reinforcements (5) pass through the PVC reserved hole channels (7), a prestressed reinforcement fixed-end anchorage device (5-1) is installed at a groove at the bottom of the bearing platform (1), a prestressed reinforcement tensioning end anchorage device (5-2) is installed on a second square steel base plate (8-3) laid at the top end of the upper section (4) of the prefabricated pier, and the prestressed reinforcements (5) are tensioned and anchored by using a jack; the energy-consuming steel bar group (6) is anchored and installed through PVC reserved holes (7) arranged around the expanded section (3-1) of the section plastic hinge area at the bottom of the prefabricated assembly pier, the bottom end of the energy-consuming steel bar group is fixed at a groove at the bottom of the bearing platform (1), an anchoring end (6-2) of a self-locking one-way bolt is adopted for anchoring, and the top end of the energy-consuming steel bar group is twisted and fixed on the annular steel base plate (8-2) laid on the expanded section (3-1) of the section plastic hinge area at the bottom of the prefabricated assembly pier by using a nut (6-1) at the top end of the energy-consuming steel bar group;
step five: after the construction of the connecting structures among the prefabricated assembled pier bottom section (3), the prefabricated assembled pier upper section (4) and the bearing platform (1) is completed, a protective cover (9) is additionally arranged at the top end of the energy consumption reinforcing steel bar group (6), and finally the integral installation of the plastic hinge area enlarged section assembled swing pier is completed.
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| CN202111055134.XA CN113668368B (en) | 2021-09-09 | 2021-09-09 | Plastic hinge area enlarged section assembled type swing pier and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561867A (en) * | 2022-03-10 | 2022-05-31 | 广州市市政工程设计研究总院有限公司 | Festival segmentation self-reset pier of removable power consumption spare after shake |
| CN114753272A (en) * | 2022-05-05 | 2022-07-15 | 中交路桥华东工程有限公司 | Construction method of prestressed bearing platform for bridge pier repair |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266125A (en) * | 1997-03-26 | 1998-10-06 | Hitachi Zosen Corp | Bridge pier structure of highway bridge |
| CN105755952A (en) * | 2016-04-15 | 2016-07-13 | 柳州欧维姆机械股份有限公司 | Embedded elastic rubber bearing device and construction method of applying bearing device to connection between prefabricated concrete bridge pier and pile cap |
| CN206109970U (en) * | 2016-08-31 | 2017-04-19 | 南京理工大学 | Prefabricated assembled pier suitable for well meizoseismal area |
| CN209227365U (en) * | 2018-11-29 | 2019-08-09 | 福州大学 | The Self-resetting assembled bridge pier of replaceable additional mild steel |
| CN110468694A (en) * | 2019-09-06 | 2019-11-19 | 郑州大学 | Spigot-and-socket Self-resetting multi-segmental precast pier and its assembly method |
| CN110777661A (en) * | 2019-10-29 | 2020-02-11 | 北京交通大学 | Flange connection prefabricated assembly pier structure and construction method thereof |
| CN211621177U (en) * | 2019-10-16 | 2020-10-02 | 中铁第四勘察设计院集团有限公司 | Upright post segment, assembled pier upright post and bridge lower part structure |
| CN111764303A (en) * | 2020-07-06 | 2020-10-13 | 中设设计集团股份有限公司 | Connecting structure and construction method of prefabricated pier stand column and bearing platform |
| CN212834959U (en) * | 2020-04-16 | 2021-03-30 | 连云港市建筑设计研究院有限责任公司 | Self-reset single pier column structure utilizing steel plate to dissipate energy |
| CN213038180U (en) * | 2020-06-23 | 2021-04-23 | 陕西省建筑科学研究院有限公司 | Pier is assembled to dry joint unbonded prestressing force recycled concrete festival section |
| CN113186812A (en) * | 2021-05-26 | 2021-07-30 | 南京理工大学 | Prestressed segment assembled pier with SMA energy dissipation reinforcing steel bars at bottom and assembling method |
-
2021
- 2021-09-09 CN CN202111055134.XA patent/CN113668368B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266125A (en) * | 1997-03-26 | 1998-10-06 | Hitachi Zosen Corp | Bridge pier structure of highway bridge |
| CN105755952A (en) * | 2016-04-15 | 2016-07-13 | 柳州欧维姆机械股份有限公司 | Embedded elastic rubber bearing device and construction method of applying bearing device to connection between prefabricated concrete bridge pier and pile cap |
| CN206109970U (en) * | 2016-08-31 | 2017-04-19 | 南京理工大学 | Prefabricated assembled pier suitable for well meizoseismal area |
| CN209227365U (en) * | 2018-11-29 | 2019-08-09 | 福州大学 | The Self-resetting assembled bridge pier of replaceable additional mild steel |
| CN110468694A (en) * | 2019-09-06 | 2019-11-19 | 郑州大学 | Spigot-and-socket Self-resetting multi-segmental precast pier and its assembly method |
| CN211621177U (en) * | 2019-10-16 | 2020-10-02 | 中铁第四勘察设计院集团有限公司 | Upright post segment, assembled pier upright post and bridge lower part structure |
| CN110777661A (en) * | 2019-10-29 | 2020-02-11 | 北京交通大学 | Flange connection prefabricated assembly pier structure and construction method thereof |
| CN212834959U (en) * | 2020-04-16 | 2021-03-30 | 连云港市建筑设计研究院有限责任公司 | Self-reset single pier column structure utilizing steel plate to dissipate energy |
| CN213038180U (en) * | 2020-06-23 | 2021-04-23 | 陕西省建筑科学研究院有限公司 | Pier is assembled to dry joint unbonded prestressing force recycled concrete festival section |
| CN111764303A (en) * | 2020-07-06 | 2020-10-13 | 中设设计集团股份有限公司 | Connecting structure and construction method of prefabricated pier stand column and bearing platform |
| CN113186812A (en) * | 2021-05-26 | 2021-07-30 | 南京理工大学 | Prestressed segment assembled pier with SMA energy dissipation reinforcing steel bars at bottom and assembling method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561867A (en) * | 2022-03-10 | 2022-05-31 | 广州市市政工程设计研究总院有限公司 | Festival segmentation self-reset pier of removable power consumption spare after shake |
| CN114561867B (en) * | 2022-03-10 | 2024-03-15 | 广州市市政工程设计研究总院有限公司 | Sectional type self-resetting bridge pier with replaceable energy consumption piece after earthquake |
| CN114753272A (en) * | 2022-05-05 | 2022-07-15 | 中交路桥华东工程有限公司 | Construction method of prestressed bearing platform for bridge pier repair |
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|---|---|
| CN113668368B (en) | 2023-06-20 |
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