CN112627016B - Assembly type pier with self-resetting and strong energy consumption and construction method thereof - Google Patents
Assembly type pier with self-resetting and strong energy consumption and construction method thereof Download PDFInfo
- Publication number
- CN112627016B CN112627016B CN202110034362.2A CN202110034362A CN112627016B CN 112627016 B CN112627016 B CN 112627016B CN 202110034362 A CN202110034362 A CN 202110034362A CN 112627016 B CN112627016 B CN 112627016B
- Authority
- CN
- China
- Prior art keywords
- pier
- prestressed
- pier body
- energy consumption
- bearing platform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of structural engineering, and discloses an assembly type pier with self-resetting and strong energy consumption, which comprises a bearing platform body, a pier body, prestressed tendons and energy consumption rods, wherein the bearing platform body is provided with a bearing platform body; the upper end face of the bearing platform body is provided with an inward-concave fixing groove, and the bottom of the pier body is assembled in the fixing groove; the lower connecting section of the pier body extends outwards around the pier body to form a connecting block, and an upper prestressed tendon pipeline is reserved in the connecting block; the lower end of the prestressed tendon is embedded in the bearing platform body, and the prestressed tendon penetrates through the upper prestressed tendon pipeline; the lower part of the energy consumption rod is embedded in the bearing platform body, and the upper part of the energy consumption rod is positioned in the lower connecting section. The connecting block formed by the protrusion is provided with the tensioning prestressed tendons, so that the weakening of the prestressed pore channel to the pier body is avoided, and the vertical bearing capacity of the pier body in a prestressed connection mode is enhanced. The stretching effect of the prestressed tendons enables the pier body to be automatically reset.
Description
Technical Field
The invention relates to the technical field of structural engineering, in particular to an assembly type pier with self-resetting and strong energy consumption and a construction method thereof.
Background
The assembled construction transports the bridge construction prefabricated in the factory or on the spot to the bridge position department and assembles, can alleviate environmental pollution, and is little to traffic and resident's life influence, assembles substructure and also adopts prefabricated technique from bridge superstructure prefabrication, and current assembled bridge beam develops comprehensively, has developed and has covered pile foundation, pier stud, bent cap, abutment, retaining wall, girder, anticollision barrier's full assembled bridge construction to become the mainstream of bridge construction gradually.
Generally, the assembled pier is a straight-tube hollow pier, a plastic hinge area is formed between a pier body and a bearing platform body, in order to ensure the connection reliability between the pier body and the bearing platform body, a prestress connection mode is often adopted, the plastic hinge area at the bottom of the pier of the traditional prestress connection mode is easy to rigidly rotate, the marginal area concrete of the pier body is cracked or even crushed in the rotation process, the pier body and the bearing platform are connected through prestress, and the contact surface does not have a shear key or other limiting devices, the joint position is easy to be damaged due to large local stress, and the marginal area concrete of the pier is crushed.
Disclosure of Invention
The invention aims to provide an assembly type pier with self-resetting and strong energy consumption and a construction method thereof, and aims to solve the problem that in the prior art, the edge area of an assembly type pier body is easy to crack, so that the safety of a pier body is affected.
The invention is realized in this way, the assembly type pier with self-resetting and strong energy consumption comprises a bearing platform body, a pier body, prestressed tendons and energy consumption rods;
the upper end surface of the bearing platform body is provided with an inward-concave fixing groove, and the bottom of the pier body is assembled in the fixing groove;
the pier body comprises an upper supporting section and a lower connecting section, the lower connecting section extends outwards around the pier body to form a connecting block, and an upper prestressed tendon pipeline is reserved in the connecting block;
the lower end of the prestressed tendon is embedded in the bearing platform body, and the prestressed tendon penetrates through the upper prestressed tendon pipeline;
the lower part of the energy consumption rod is embedded in the bearing platform body, and the upper part of the energy consumption rod is positioned in the lower connecting section of the pier body.
Furthermore, the lower connecting section is in a solid pier form, a distribution hole is reserved in the lower connecting section, and the upper part of the energy consumption rod penetrates through the distribution hole.
Furthermore, the shape of the fixed groove is the same as or corresponding to the cross section of the lower connecting section, the fixed groove is in a form that the periphery is sunken and the middle part is provided with a bulge, a cavity is arranged at the bottom of the pier body, the bulge is embedded into the cavity, and the outer side wall of the bulge is pressed against the inner side wall of the cavity.
Furthermore, a rubber cushion layer is laid in the fixing groove, and the lower connecting section is located above the rubber cushion layer.
Furthermore, the outside of connecting block is vertical arrangement, and its upper portion is the slope and arranges, the connecting block is close to one side height of pier body keeps away from one side height of pier body.
Furthermore, an anchoring device is pre-embedded in the bearing platform body, the lower end of the prestressed tendon is anchored on the anchoring device, and the upper end of the prestressed tendon is tensioned after the pier body is installed.
Furthermore, a lower prestressed tendon pipeline is preset above the anchoring device, and the prestressed tendons penetrate through the lower prestressed tendon pipeline.
A construction method of an assembly type pier with self-resetting and strong energy consumption comprises the following steps:
s01: prefabricating a pier body, wherein the pier body comprises an upper supporting section and a lower connecting section, the lower connecting section extends outwards around a pier body to form a connecting block, and an upper prestressed tendon pipeline is reserved in the connecting block;
s02: pouring a bearing platform body, wherein in the pouring process, an inwards-concave fixing groove is formed on the upper end surface of the bearing platform body and is used for assembling the bottom of the pier body, and the lower end of the prestressed tendon and the lower part of the energy dissipation rod are embedded in the bearing platform body;
s03: hoisting the prefabricated pier body to the bearing platform body, so that the lower connecting section is embedded into the fixing groove, the prestressed tendons penetrate through the upper prestressed tendon pipeline, and the upper part of the energy dissipation rod penetrates through the lower connecting section;
s04: and tensioning the upper ends of the prestressed tendons after the pier body is installed, keeping the pier body vertically arranged, and fixing the upper ends of the prestressed tendons.
Further, in step S02, an anchoring device is pre-embedded in the bearing platform body, a lower prestressed tendon pipeline is arranged above the anchoring device, the lower end of the prestressed tendon is anchored on the anchoring device, and the lower part of the prestressed tendon is inserted into the lower prestressed tendon pipeline.
Further, the outer contour of the fixing groove is larger than the bottom of the lower connecting section, and after step S04 is completed, the gap between the fixing groove and the lower connecting section is filled with a filling material.
In summary, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. the invention provides an assembly type pier with self-resetting and strong energy consumption and a construction method thereof, wherein the assembly type pier comprises a bearing platform body, a pier body, prestressed tendons, a rubber cushion layer and an energy consumption rod; the upper surface of the bearing platform body is downwards sunken to form a fixing groove with the same shape as the lower connecting section of the pier body; the pier body is divided into an upper supporting section and a lower connecting section, the periphery of the lower connecting section protrudes outwards to form a connecting block, a prestressed pipeline is reserved in the connecting block, and a solid pier form with reserved energy consumption bar arrangement holes is prefabricated inside the connecting block; lay one deck rubber bed course in advance at the fixed slot bottom before the installation pier, through changing pier linkage segment form, change prestressing steel's position, assisted with rubber bed course again, guaranteed that the pier had both had the advantage of traditional prestressing force connected mode, can overcome the shortcoming of prestressing force pier again to a certain extent.
2. According to the assembly type bridge pier with the self-resetting and strong energy consumption functions and the construction method thereof, the connecting blocks are outwards arranged on the periphery of the lower connecting section of the bridge pier body, and the tensioning prestressed tendons are arranged in the connecting blocks, so that the bridge pier body is prevented from being weakened by the prestressed pore channels, and the vertical bearing capacity of the bridge pier body in a prestressed connecting mode is enhanced.
3. According to the fabricated bridge pier with the self-resetting function and the strong energy consumption and the construction method thereof, the rubber cushion layer is paved at the bottom of the bridge pier, so that the phenomenon that concrete at the edge of the bridge pier body is crushed due to eccentric compression or other special conditions of the bridge pier body can be prevented, and the anti-seismic performance of the bridge pier can be improved; the addition of the prestressed tendons increases the self-resetting performance of the pier after the earthquake, and the residual deformation of the pier after the earthquake is small, so that the pier is favorable for repair;
4. according to the assembly type pier with the self-resetting function and the strong energy consumption function and the construction method thereof, temporary fixing measures are not needed during construction, and construction is convenient; and other special construction processes are not adopted, so that the construction is simple.
Drawings
Fig. 1 is a schematic structural diagram of an assembled pier with self-resetting and high energy consumption according to the present invention;
fig. 2 is a schematic bottom view of a pier body having a self-resetting and energy-intensive fabricated pier according to the present invention;
FIG. 3 is a schematic cross-sectional view of a cap body with a self-resetting and energy-intensive assembled pier according to the present invention;
fig. 4 is a schematic top view of a cap body having a self-resetting and energy-intensive fabricated pier according to the present invention.
Description of the reference numerals:
1-bearing platform body, 101-fixing groove, 1011-concave part and 1012-convex part;
2-pier body, 201-upper supporting section, 202-lower connecting section, 2021-connecting block, 2022-cavity and 2023-arrangement hole;
3-prestressed tendons, 301-an upper prestressed tendon pipeline and 302-a lower prestressed tendon pipeline;
4-a rubber cushion layer;
5-energy consumption rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and operate, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and it is possible for one of ordinary skill in the art to understand the specific meaning of the above terms according to the specific situation.
Referring to fig. 1-4, preferred embodiments of the present invention are shown.
An assembly type pier with self-resetting and strong energy consumption comprises a bearing platform body 1, a pier body 2, a prestressed tendon 3 and an energy consumption rod 5, wherein an inward-recessed fixing groove 101 is formed in the upper end surface of the bearing platform body 1, and the bottom of the pier body 2 is assembled in the fixing groove 101; the pier body 2 comprises an upper supporting section 201 and a lower connecting section 202, the lower connecting section 202 extends outwards around the pier body to form a connecting block 2021, and an upper prestressed tendon pipeline 301 is reserved in the connecting block 2021; the lower end of the prestressed tendon 3 is embedded in the bearing platform body 1, and the prestressed tendon 3 penetrates through the upper prestressed tendon pipeline 301; the lower part of the energy consumption rod 5 is embedded in the bearing platform body 1, and the upper part is positioned in the lower connecting section 202.
The embodiment provides an assembled pier that possesses from restoring to throne and consume energy by force, and the lower part linkage segment 202 of pier body 2 forms connecting block 2021 to outside protrusion around the pier shaft to arrange stretch-draw prestressing tendons 3 among them, avoided the prestressing force pore canal to the weakening of pier body 2, strengthened the vertical bearing capacity of pier body 2 in prestressing force connected mode. When the pier body 2 deflects to a certain degree, the pier body 2 can be pulled back to a normal position by the prestressed tendons 3 under the tensioning action of the prestressed tendons 3, and the pier body is automatically reset. The energy consumption rod 5 pre-embedded in the bearing platform body 1 is arranged in the lower connecting section 202 of the pier body 2 in a penetrating mode, the anti-seismic performance of the pier is improved, and the energy consumption rod 5 is damaged preferentially under the action of an earthquake, so that the pier body 2 is protected.
As shown in fig. 1-2, the present embodiment provides an assembled pier with self-resetting and high power consumption, comprising: cushion cap body 1, pier body 2, prestressing tendons 3, rubber cushion 4 and power consumption stick 5.
The bearing platform body 1 can be prefabricated or cast-in-place, the upper end surface of the bearing platform body 1 is inwards sunken to form a fixing groove 101 which is the same as or corresponding to the bottom of the pier body 2 in shape, the periphery of the fixing groove 101 is sunken, and a convex part 1012 is formed in the middle of the fixing groove. The fixing groove comprises a concave part 1011 and a convex part 1012, the upper end surface of the convex part 1012 can be flush with the upper end surface of the bearing platform body 1, the construction is simple, and only the concave parts on the periphery are dug out; or the upper end surface of the convex part 1012 may be higher than the upper end surface of the bearing platform body 1, so as to enhance the connection between the pier body 2 and the bearing platform body 1. Correspondingly, the bottom of the pier body 2 is provided with a cavity 2022, when the pier body 2 is hoisted to the fixing groove 101 of the bearing platform body 1, the convex part 1012 on the bearing platform body 1 is embedded into the cavity 2022 at the bottom of the pier body 2, and the outer side wall of the convex part 1012 is pressed against the inner side wall of the cavity 2022; the peripheral portion of the cavity 2022 of the pier body 2 is embedded into the recessed portion 1011 of the fixing groove 101, thereby achieving a stable connection between the bottom of the pier body 2 and the cap body 1.
Preferably, the outer contour of the fixing groove 101 is slightly larger than the outer contour of the lower connecting section 202 of the pier, so that the hoisting and installation of the pier body 2 are facilitated, and after the installation of the pier body 2 is completed, the surrounding gap between the fixing groove 101 and the lower connecting section 202 is filled with a filling material, wherein the filling material can be concrete, so that the connection stability of the pier is ensured.
The pier body 2 comprises an upper supporting section 201 and a lower connecting section 202, wherein the upper supporting section 201 is a hollow pier in a common form, and can be in the form of a cylindrical hollow pier, a square cylindrical hollow pier and the like, and is used for supporting a bridge. The lower connecting section 202 is in the form of a solid pier, a vertically downward arrangement hole 2023 is reserved in the lower connecting section, and the upper part of the energy consumption rod 5 penetrates through the arrangement hole 2023. The lower connecting section 202 extends outwards around the pier body to form a connecting block 2021, and an upper prestressed tendon pipeline 301 is reserved in the connecting block 2021; the outside of connecting block 2021 is vertical arrangement, and its upper portion is the slope and arranges, and connecting block 2021 is close to pier body 2 one side height, and the side of keeping away from pier body 2 is low. In the process of casting the pier body 2, a reinforced concrete structure, particularly, the lower connection section 202 and the connection block 2021 are arranged with vertical longitudinal reinforcements, horizontal reinforcements, and annular transverse stirrups, so as to reinforce the strength of the lower connection section 202 and the connection block 2021.
The arrangement of the connecting blocks 2021 of the pier body 2 avoids the pre-stressed ducts from weakening the pier body 2, and enhances the vertical bearing capacity of the pier body 2 in a pre-stressed connection mode. The outer side of the connecting block 2021 is vertically arranged, and when the lower connecting section 202 of the pier body 2 is connected to the fixing groove 101, the connecting block 2021 is matched with the concave portion 1011 of the fixing groove 101, so as to provide better connection support. The upper portion of the connecting block 2021 is arranged in an inclined manner, one side of the connecting block 2021 close to the pier body 2 is high, and the side far away from the pier body 2 is low, so that the rigidity gradual change of the lower connecting section 202 of the pier body 2 is formed, the stress area of the pier bearing earthquake load is enhanced, and the earthquake resistance of the pier is improved.
In this embodiment, the energy consumption rod 5 is a lead core rod, an alloy rod or an iron core rod, and the energy consumption rod 5 absorbs energy to protect the pier body 2 during an earthquake; the lower part of the energy dissipation rod 5 is embedded in the middle of the boss 1012 of the bearing platform body 1, the upper part of the energy dissipation rod 5 penetrates through a reserved arrangement hole 2023 of the lower connecting section 202 of the pier body 2, and the diameter of the arrangement hole 2023 is equal to that of the energy dissipation rod 5 or the diameter of the arrangement hole 2023 is slightly larger than that of the energy dissipation rod 5. The arrangement of the energy consumption rods 5 improves the seismic performance of the pier, and the energy consumption rods 5 are damaged preferentially under the action of earthquake, so that the pier body 2 is protected.
When the pier body 2 is prefabricated, the arrangement holes 2023 are prefabricated at the same time and can be formed by pouring reinforced concrete, and after the pier body 2 is hoisted and the energy dissipation rods 5 penetrate through the arrangement holes 2023, gaps between the energy dissipation rods 5 and the arrangement holes 2023 can be filled with concrete grouting. Preferably, the arrangement holes 2023 may be formed by using sleeves, for example, a steel sleeve is embedded in the bottom of the pier body 2, the inner diameter of the steel sleeve is slightly larger than or equal to the diameter of the energy dissipation rod 5, when the pier body 2 is hoisted, the upper portion of the energy dissipation rod 5 is inserted into the steel sleeve, the assembly precision is significantly improved, and the edge breakage phenomenon of the arrangement holes 2023 is avoided.
The lower end of the prestressed tendon 3 is embedded in the bearing platform body 1, and the upper end thereof penetrates through the upper prestressed tendon pipeline 301 prefabricated in the connecting block 2021. An anchoring device is pre-embedded in the bearing platform body 1, the lower end of the prestressed tendon 3 is anchored on the anchoring device, a lower prestressed tendon pipeline 302 is pre-arranged above the anchoring device and in the bearing platform body 1, and the prestressed tendon 3 penetrates through the lower prestressed tendon pipeline 302. The lower tendon duct 302 is in communication with the upper tendon duct 301. Preferably, the upper tendon duct 301 and the lower tendon duct 302 are vertically arranged. From bottom to top, the lower end of the prestressed tendon 3 is anchored on the anchoring device, the lower part of the prestressed tendon 3 is arranged in the lower prestressed tendon pipeline 302 in a penetrating mode, and in the installation process of the pier body 2, the upper part of the prestressed tendon 3 is arranged in the upper prestressed tendon pipeline 301 in a penetrating mode; after the pier body 2 is installed, the upper ends of the prestressed tendons 3 are tensioned, so that the pier body 2 is kept vertically arranged, and the upper ends of the prestressed tendons 3 are fixed. The upper end of the upper prestressed tendon pipeline 301 can be arranged in a counter bore mode, so that the tensioning end of the prestressed tendon 3 is fixed in the counter bore, and the end face of the counter bore is horizontally arranged, and the tensioning end is favorably fixed.
The prestressed tendons 3 are divided into a clip type (single-hole and multi-hole clip type), a support type (upset head anchor, nut anchor, etc.), a cone type (steel cone anchor, etc.) and a bond type (extrusion anchor, embossed anchor, etc.) according to different anchoring modes by using anchors, clamps and connectors. The engineering design unit selects a proper anchorage device according to the structure requirement, the technical performance of the product and the tensioning construction method.
When the prestressed tendon 3 is a steel strand or a steel strand bundle, a clamping piece anchorage is selected at the tensioning end, and at the fixed end: if the anchor is installed outside the structure, a clip anchor or an extrusion anchor is selected; if installed within the structure, an embossed anchor or extruded anchor is selected.
When the prestressed tendon 3 is a high-strength steel wire bundle, a clamping anchorage, an upset head anchorage or a conical plug anchorage is selected at the tensioning end, and the prestressed steel wire bundle is characterized in that: if the anchor is installed outside the structure, a clamping piece anchor, an extrusion anchor or a heading anchor is selected; if installed within the structure, an upset head anchor or an extruded anchor is selected.
When prestressing tendons 3 are finish rolling twisted steel, select nut ground tackle for use at the tensioning end, at the stiff end: if the anchor is installed outside the structure, a nut anchor is selected.
The number of the prestressed tendons 3 can be adjusted according to the structural design requirements, and the number can be four, but is not limited to four. When the prestressed tendons 3 are arranged, the prestressed tendons are preferably uniformly arranged around the pier body 2, so that the tension force of the prestressed tendons 3 borne by the pier body 2 is balanced. When the pier body 2 deflects to a certain degree, the pier body 2 is pulled back to a normal position by the prestressed tendons 3 under the tensioning action of the prestressed tendons 3, and the pier body is automatically reset.
The bottom of the fixing groove 101 of the bearing platform body 1 is paved with a rubber cushion layer 4, and the lower connecting section 202 of the pier body 2 is hung above the rubber cushion layer 4. The rubber cushion layer 4 has high elastic deformation and bearing functions, can prevent the edge concrete of the pier body 2 from being crushed due to eccentric compression or other special conditions, and can also increase the anti-seismic performance of the pier.
In this embodiment, lay one deck rubber bed course 4 in advance at fixed slot 101 bottom before installation pier body 2 to through the lower part linkage segment 202 form that changes pier body 2, change the position of prestressing steel, be aided with rubber bed course 4 again, guaranteed that the pier had both had the advantage of traditional prestressing force connected mode, can overcome the shortcoming of traditional prestressing force pier to a certain extent again. The traditional prestressed bridge pier has the following defects: the pier bottom plastic hinge region of the pier adopting the traditional prestress connection mode is easy to rigidly rotate, the marginal region concrete of the pier body 2 is cracked or even crushed in the rotation process, the pier body and the bearing platform foundation are connected through prestress, and when no shear key or other limiting devices are arranged on the contact surface, the joint position is easy to be damaged due to large local stress, so that the marginal region concrete of the pier is crushed. The rubber cushion layer 4 not only can play a role in energy dissipation and shock absorption, but also can avoid the concrete cracking and even crushing of the edge area of the pier body 2, ensure the flexible contact between the pier body 2 and the bearing platform body 1, is favorable for the automatic reset of the pier body 2, and further improves the self-reset and strong energy dissipation performance of the assembled pier.
The rubber cushion layer 4 is laid at the bottom of the fixing groove 101, the thickness of the rubber cushion layer is adjusted according to the number of the prestressed tendons 3 of the pier body 2, the rubber cushion layer has a buffering effect on the stress of the pier body 2 under special conditions, can play a role in resisting shock and energy consumption, and does not influence the normal placement and use of the pier.
The rubber cushion layer 4 may be made of natural rubber or synthetic rubber, or may have a multi-layer structure, for example, a lead-core rubber support, which is formed by laminating and bonding lead-core rods, rubber layers, steel plates, etc., wherein the steel plates are disposed on the upper and lower end surfaces, the rubber layers are disposed between the upper and lower steel plates, the rubber layers are formed by alternately laminating multiple layers of natural rubber and multiple layers of steel plates, a lead core is disposed at the center of the rubber layer, and the lead core is connected with the upper and lower steel plates. In the above structure, the lead core helps the carrier to be pulled back to the original position after an earthquake, the natural rubber enables the rubber cushion layer 4 to be horizontally deformed, the steel sheet enables the rubber cushion layer 4 to have the capability of vertical load, and the upper steel plate and the lower steel plate can be used for fixing the rubber cushion layer 4 between the bottom of the fixing groove 101 and the bottom of the pier body 2. The rubber cushion layer 4 has high bearing capacity, large damping capacity, large horizontal displacement capacity and reset function, and is a shock isolation device integrating supporting and energy consumption.
A construction method of an assembly type pier with self-resetting and strong energy consumption comprises the following steps:
s01: prefabricating a pier body 2, wherein the pier body 2 comprises an upper support section 201 and a lower connecting section 202, the lower connecting section 202 extends outwards around a pier body to form a connecting block 2021, and an upper prestressed tendon pipeline 301 is reserved in the connecting block 2021;
s02: pouring the bearing platform body 1, wherein in the pouring process, an inward-concave fixing groove 101 is formed in the upper end face of the bearing platform body 1 and used for assembling the bottom of the pier body 2, and the lower ends of the prestressed tendons 3 and the lower parts of the energy dissipation rods 5 are embedded in the bearing platform body 1;
s03: hoisting the prefabricated pier body 2 to the bearing platform body 1, so that the lower connecting section 202 is embedded into the fixing groove 101, the prestressed tendons 3 penetrate through the upper prestressed tendon pipeline 301, and the upper part of the energy consumption rod 5 penetrates through the lower connecting section 202;
s04: after the pier body 2 is installed, the upper ends of the prestressed tendons 3 are tensioned, the pier body 2 is kept vertically arranged, and the upper ends of the prestressed tendons 3 are fixed.
In step S01, in the process of prefabricating the pier body 2, the lower connecting section 202 is prefabricated into a solid pier form, and the arrangement hole 2023 is reserved inside the lower connecting section 202 for arranging the upper part of the energy consumption rod 5.
In step S01, when prefabricating the pier body 2, the connection block 2021 is arranged to be vertical at the outer side, the upper portion of the connection block 2021 is arranged to be inclined, one side of the connection block 2021 close to the pier body 2 is high, and the other side of the connection block 2021 far away from the pier body 2 is low, so that the rigidity of the lower connection section 202 is gradually changed.
In step S02, an anchoring device is embedded in the bearing platform body 1, a lower tendon pipeline 302 is disposed above the anchoring device, the lower end of the tendon 3 is anchored on the anchoring device, and the lower part of the tendon 3 is inserted into the lower tendon pipeline 302.
In step S03, before the bridge pier body 2 is hoisted, the rubber pad 4 is laid on the bottom of the fixed groove 101, and the bottom of the lower connecting segment 202 of the bridge pier body 2 is hoisted above the rubber pad 4.
In step S04, the tendon 3 is made to be in a tensed state during tensioning of the tendon 3.
The outer contour of the fixing groove 101 is larger than the bottom of the lower connecting section 202, and after step S04 is completed, the gap between the fixing groove 101 and the lower connecting section 202 is filled with a filling material.
After step S04 is completed, the gap between the energy consumption rod 5 and the inner wall of the arrangement hole 2023 is filled with a filling material.
In summary, by the above technical solution conceived by the present invention, the following beneficial effects can be obtained:
1. the invention provides an assembly type pier with self-resetting and strong energy consumption and a construction method thereof, wherein the assembly type pier comprises a bearing platform body 1, a pier body 2, prestressed tendons 3, a rubber cushion layer 4 and an energy consumption rod 5; the upper surface of the bearing platform body 1 is downwards sunken to form a fixing groove 101 with the same shape as the lower connecting section 202 of the pier body 2; the pier body 2 is divided into an upper supporting section 201 and a lower connecting section 202, the periphery of the lower connecting section 202 protrudes outwards to form a connecting block 2021, a prestressed pipeline is reserved in the connecting block, and a solid pier form with a reserved energy consumption bar 5 arrangement hole 2023 is prefabricated inside the connecting block; a layer of rubber cushion layer 4 is laid in advance in the bottom of the fixing groove 101 before the pier is installed, the position of the prestressed reinforcement is changed by changing the form of the pier connecting section, and the rubber cushion layer 4 is used as an auxiliary, so that the pier has the advantages of a traditional prestress connecting mode, and the defects of a prestressed pier can be overcome to a certain degree.
2. According to the fabricated pier with the self-resetting and strong energy consumption and the construction method thereof, the connecting blocks 2021 are outwards arranged on the periphery of the lower connecting section 202 of the pier body 2, and the tensioning prestressed tendons 3 are arranged in the connecting blocks, so that the pier body 2 is prevented from being weakened by prestressed ducts, and the vertical bearing capacity of the pier body 2 in a prestressed connecting mode is enhanced.
3. According to the assembly type bridge pier with the self-resetting and strong energy consumption and the construction method thereof, the rubber cushion layer 4 is laid at the bottom of the bridge pier, so that the phenomenon that concrete at the edge of the bridge pier body 2 is crushed due to eccentric compression or other special conditions of the bridge pier body 2 can be prevented, and the anti-seismic performance of the bridge pier can be improved; the addition of the prestressed tendons 3 increases the self-resetting performance of the pier after the earthquake, and the residual deformation after the earthquake is small, so that the repair is facilitated;
4. according to the assembly type pier with the self-resetting function and the strong energy consumption function and the construction method thereof, temporary fixing measures are not needed during construction, and construction is convenient; and other special construction processes are not adopted, so that the construction is simple.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. An assembly type pier with self-resetting and strong energy consumption is characterized by comprising a bearing platform body, a pier body, prestressed tendons and an energy consumption rod;
the upper end face of the bearing platform body is provided with an inward-concave fixing groove, and the bottom of the pier body is assembled in the fixing groove;
the pier body comprises an upper supporting section and a lower connecting section, the upper supporting section is a hollow pier, the lower connecting section extends outwards around a pier body to form a connecting block, and an upper prestressed tendon pipeline is reserved in the connecting block;
the lower end of the prestressed tendon is embedded in the bearing platform body, and the prestressed tendon penetrates through the upper prestressed tendon pipeline;
the lower part of the energy consumption rod is embedded in the bearing platform body, and the upper part of the energy consumption rod is positioned in the lower connecting section of the pier body; the energy dissipation bar can absorb energy to protect the pier body in case of earthquake;
the lower connecting section is in a solid pier form, an arrangement hole is reserved in the lower connecting section, and the upper part of the energy consumption rod penetrates through the arrangement hole;
the shape of the fixing groove is the same as or corresponds to the cross section of the lower connecting section, the fixing groove is recessed at the periphery, a bulge part is arranged in the middle of the fixing groove, a cavity is arranged at the bottom of the pier body, the bulge part is embedded into the cavity, and the outer side wall of the bulge part is pressed against the inner side wall of the cavity; a rubber cushion layer is laid in the fixing groove, and the lower connecting section is positioned above the rubber cushion layer; an anchoring device is pre-embedded in the bearing platform body, the lower end of the prestressed tendon is anchored on the anchoring device, and the upper end of the prestressed tendon is tensioned after the pier body is installed.
2. The assembled pier with self-resetting and high energy consumption of claim 1, wherein the connecting blocks are vertically arranged on the outer side and obliquely arranged on the upper part, and the side of the connecting blocks close to the pier body is high and the side far away from the pier body is low.
3. The assembly type pier with self-resetting and high energy consumption as claimed in claim 1, wherein a lower tendon duct is pre-installed above the anchoring device, and the tendon is inserted into the lower tendon duct.
4. The construction method of the assembled pier with self-resetting and high energy consumption based on any one of claims 1 to 3, is characterized by comprising the following steps:
s01: prefabricating a pier body, wherein the pier body comprises an upper supporting section and a lower connecting section, the lower connecting section extends outwards around a pier body to form a connecting block, and an upper prestressed tendon pipeline is reserved in the connecting block;
s02: a pouring bearing platform body, wherein in the pouring process, an inward-concave fixing groove is formed on the upper end face of the bearing platform body and is used for assembling the bottom of the pier body, and the lower end of the prestressed tendon and the lower part of the energy dissipation rod are embedded in the bearing platform body;
s03: hoisting the prefabricated pier body to the bearing platform body, so that the lower connecting section is embedded into the fixing groove, the prestressed tendons penetrate through the upper prestressed tendon pipeline, and the upper part of the energy dissipation rod penetrates through the lower connecting section;
s04: and tensioning the upper ends of the prestressed tendons after the pier body is installed, keeping the pier body vertically arranged, and fixing the upper ends of the prestressed tendons.
5. The method of constructing an assembled pier having self-restoration and high energy consumption according to claim 4, wherein in step S02, an anchoring device is embedded in the platform body, a lower tendon duct is provided above the anchoring device, a lower end of the tendon is anchored to the anchoring device, and a lower portion of the tendon is inserted into the lower tendon duct.
6. The construction method of an assembled pier having self-restoration and high energy consumption according to claim 5, wherein the outer contour of the fixing groove is larger than the bottom of the lower connecting section, and after the step S04 is completed, the gap between the fixing groove and the lower connecting section is filled with a filling material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110034362.2A CN112627016B (en) | 2021-01-11 | 2021-01-11 | Assembly type pier with self-resetting and strong energy consumption and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110034362.2A CN112627016B (en) | 2021-01-11 | 2021-01-11 | Assembly type pier with self-resetting and strong energy consumption and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112627016A CN112627016A (en) | 2021-04-09 |
| CN112627016B true CN112627016B (en) | 2023-01-10 |
Family
ID=75294042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110034362.2A Active CN112627016B (en) | 2021-01-11 | 2021-01-11 | Assembly type pier with self-resetting and strong energy consumption and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112627016B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113502749B (en) * | 2021-07-18 | 2023-04-25 | 黄河水利职业技术学院 | Bridge pier construction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019056715A1 (en) * | 2017-09-20 | 2019-03-28 | 中国建筑股份有限公司 | Mixed-connection post-tensioned prestressed assembly concrete frame architecture and construction method therefor |
| 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 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147391B (en) * | 2013-03-29 | 2015-08-26 | 东南大学 | One is easy to shake rear reparation and corrosion resistant self-centering bridge pier structure |
| KR101687072B1 (en) * | 2014-10-15 | 2016-12-16 | 중앙대학교 산학협력단 | Precast piers and precast construction method using the same piers |
| CN105442433A (en) * | 2015-11-30 | 2016-03-30 | 中铁二十四局集团安徽工程有限公司 | Connection structure of prefabricated bridge pier and bearing platform and construction method thereof |
| CN108316131A (en) * | 2018-04-17 | 2018-07-24 | 苏交科集团（甘肃）交通规划设计有限公司 | A kind of precast block formula full prestressing pier structure and its method of construction |
| CN108532446B (en) * | 2018-06-11 | 2023-08-29 | 华侨大学 | Assembled steel bridge pier with self-resetting function |
| CN110847019A (en) * | 2019-11-20 | 2020-02-28 | 北京工业大学 | Steel plate connection-based reinforced concrete hollow pipe pier joint connection mode and structure |
| CN111074923A (en) * | 2019-12-27 | 2020-04-28 | 清华大学 | Connecting structure of prefabricated hollow pier and bearing platform and construction method thereof |
| CN111270601A (en) * | 2020-03-25 | 2020-06-12 | 深圳市市政工程总公司 | Connection structure of prefabricated hollow bridge pier column and sunken bearing platform with external notch |
| CN111809510A (en) * | 2020-08-13 | 2020-10-23 | 上海应用技术大学 | Bearing-socket type prefabricated bridge pier connecting structure and construction method thereof |
-
2021
- 2021-01-11 CN CN202110034362.2A patent/CN112627016B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019056715A1 (en) * | 2017-09-20 | 2019-03-28 | 中国建筑股份有限公司 | Mixed-connection post-tensioned prestressed assembly concrete frame architecture and construction method therefor |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112627016A (en) | 2021-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108547217B (en) | Prefabricated bridge precast concrete pier column and cover beam socket structure and construction method | |
| CN110359363B (en) | Partially-bonded prestressed assembly type self-resetting bridge pier column node and method | |
| CN112627016B (en) | Assembly type pier with self-resetting and strong energy consumption and construction method thereof | |
| CN110468986B (en) | Swinging self-resetting shock absorption system for center pillar of underground station and construction method | |
| CN211368352U (en) | Connecting structure for assembly type pier and bearing platform anchoring steel bar sleeving and inserting post-pouring RPC | |
| CN109853364A (en) | A kind of the precast segment assembly bridge pier connection structure and method of shearing resistance | |
| CN110820545A (en) | Assembled concrete pier | |
| CN111733692A (en) | Segment pre-pressing assembly type concrete pier structure and construction method thereof | |
| CN103210148A (en) | Truss structure having an open-section upper chord member and a production method for the same, and a truss bridge using the truss structure having an open-section upper chord member and a method for constructing the same | |
| CN110725195A (en) | Connecting method for assembly type pier and bearing platform anchoring steel bar sleeve-insertion post-cast RPC and application thereof | |
| CN114541242B (en) | Anchor ear type concrete connection structure of assembled bridge pier column and pile foundation and construction method | |
| CN214993017U (en) | Assembled pier that possesses from restoring to throne and consume energy by force | |
| CN108442238A (en) | A kind of transverse direction assembled runback bit-type Antivibration block and its construction method | |
| CN110004818B (en) | Energy-consumption type swinging self-resetting anti-seismic stop block system and construction method thereof | |
| CN114411535A (en) | Full-prestress double-column type segment assembled pier with external energy dissipation damper and design and construction method thereof | |
| CN112176886B (en) | Double-steel sleeve socket connection structure of prefabricated bridge pier and construction method thereof | |
| CN111455833A (en) | Self-resetting prefabricated assembled pier and construction method thereof | |
| CN114908661B (en) | Rubber energy consumption self-resetting socket pier connection structure and assembly method thereof | |
| CN115369747A (en) | Self-resetting prefabricated assembled pier | |
| CN110747735A (en) | Anchoring connection device for precast concrete bridge deck of steel-concrete composite beam | |
| CN208362891U (en) | A kind of transverse direction assembled runback bit-type Antivibration block | |
| CN216838943U (en) | Pier is assembled to external power consumption damper's full prestressing force double column formula festival section | |
| CN212561123U (en) | Combined embedded connection structure between prefabricated pier stud and base | |
| CN212404807U (en) | Segment pre-pressing assembly type concrete pier structure | |
| CN212656106U (en) | Self-resetting prefabricated assembled pier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |