CN107386098B - Buckling restrained round-end type steel pipe concrete pier and bearing platform connecting structure and method - Google Patents
Buckling restrained round-end type steel pipe concrete pier and bearing platform connecting structure and method Download PDFInfo
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- CN107386098B CN107386098B CN201710499667.4A CN201710499667A CN107386098B CN 107386098 B CN107386098 B CN 107386098B CN 201710499667 A CN201710499667 A CN 201710499667A CN 107386098 B CN107386098 B CN 107386098B
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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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Abstract
The invention discloses a buckling restrained round-end type steel pipe concrete pier which comprises a round-end type steel pipe formed by welding two identical cold-bending formed semicircular steel plates and two flat steel plates by adopting butt welding seams; the bottom of the bridge is welded with an end plate, and 1 anchor bolt hole is respectively reserved at two ends of the end plate along the transverse bridge; the inner side of the round end-shaped steel pipe is filled with concrete, the lower part of the round end-shaped steel pipe is provided with a steel ferrule, and a Teflon coating is added between the steel ferrule and the round end-shaped steel pipe, so that the ferrule can be prevented from being stressed by a vertical axial force. A rubber cushion layer is arranged between the steel ferrule and the upper surface of the bearing platform, so that the steel ferrule is prevented from being bent too early due to extrusion. The pier and the bearing platform are connected by adopting a grouting metal corrugated sleeve embedded connection method, and the pier and the bearing platform can meet the requirements of factory prefabrication, field assembly and rapid construction. The steel hoop has the advantages of good anti-seismic performance, large transverse rigidity, convenient construction, less field workload and wet operation, easy repair and capability of effectively inhibiting the bulging of the bottom steel pipe and improving the ductility of the pier, and can be applied to the pier structure of major bridge engineering.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a round-end-shaped concrete-filled steel tube pier.
Background
With the development of the traffic industry of China, high-speed railways, highways, sea-crossing bridges and the like emerge in large quantities. In order to ensure the safety of the bridge structure, the bridge pier is taken as an important bearing component and needs to have better seismic performance. The traditional bridge pier is mainly made of reinforced concrete, and has poor bearing capacity and ductility, and is easy to damage and difficult to repair under the action of strong shock.
In recent years, a concrete filled steel tube pier is applied to a bridge structure due to its good seismic performance and convenient construction. And because the difference between the transverse rigidity and the forward rigidity of the bridge is large, in municipal bridge engineering, the bridge pier is often designed into a circular end-shaped section so as to improve the transverse rigidity of the bridge pier. Therefore, the round end-shaped concrete filled steel tube bridge pier has good anti-seismic performance due to large transverse rigidity and good application prospect in bridge engineering.
A large number of researchers at home and abroad indicate that when the steel tube concrete pier is subjected to earthquake action, the shearing force and the bending moment of the pier bottom are large, the damage mode is that the steel tube at the pier bottom is locally bulged, the rear bulging range is gradually enlarged and develops along the annular direction, and finally, the steel tube is damaged due to concrete crushing and steel tube tearing.
At present, two construction methods, namely bearing plate connection and embedded connection, are generally adopted for connecting the concrete-filled steel tube pier and the bearing platform. The connection of the bearing plates refers to welding end plates at the bottom ends of the steel pipes, the end plates are connected with the bearing platform through anchor bolts and anchoring reinforcing steel bars, and the construction process is complicated. The embedded connection means that the bottom end of the steel pipe is welded with an end plate, the lower part of the steel pipe and the end plate are embedded in a bearing platform for anchoring, and a cast-in-situ bearing platform is mostly adopted in construction. In order to shorten the construction period of a bridge and open traffic as soon as possible, a pier-bearing platform connecting method capable of realizing prefabricated assembly needs to be provided urgently to meet the requirement of bridge rapid construction.
Therefore, designing a buckling restrained round-end type steel pipe concrete pier and researching a connection method of the pier and a bearing platform, which can realize rapid construction, are technical problems to be solved urgently.
Disclosure of Invention
The invention provides a buckling restrained round-end type steel pipe concrete pier, a connecting structure of the buckling restrained round-end type steel pipe concrete pier and a bearing platform and a rapid construction method. The buckling restrained round-end type steel pipe concrete pier aims to overcome the defects of low bearing capacity and poor ductility of a reinforced concrete pier, fully utilizes the advantage of good seismic performance of a steel pipe concrete structure, meets the requirement of large difference of transverse bridge direction and forward bridge direction bending rigidity of the pier, restrains the buckling of a steel pipe at the bottom of the pier through the steel hoop added at the bottom, improves the ductility of the round-end type steel pipe concrete pier, and avoids the damage of the pier structure under the action of strong shock. The rapid construction method for connection of the pier and the bearing platform is grouting metal corrugated sleeve embedded connection, and aims to provide a construction method applicable to connection and anchoring of a prefabricated pier and a prefabricated bearing platform, so that the requirement for rapid construction of a bridge is met.
In order to solve the technical problem, the buckling restrained round-end type steel pipe concrete pier comprises a round-end type steel pipe, wherein the round-end type steel pipe is formed by welding two identical cold-bending formed semicircular steel plates and two flat steel plates by adopting butt welding seams; the bottom of the round end-shaped steel pipe is welded with an end plate, and the end plate and the round end-shaped steel pipe are welded by adopting a fillet weld; the end plates are respectively provided with 1 anchor bolt hole along the two ends of the transverse bridge, and the inner sides of the round end-shaped steel pipes are filled with concrete.
The lower part of the round-end-shaped steel pipe is sequentially provided with a Teflon coating and a steel ferrule from inside to outside, and the bottom of the steel ferrule is provided with a rubber cushion layer.
The steel ferrule is formed by two hoops in an encircling mode, and the two hoops are fastened through high-strength bolts.
The invention relates to a connecting structure of a buckling restrained round-end type steel pipe concrete pier and a bearing platform, wherein the bearing platform is a reinforced concrete bearing platform, a groove for embedding the buckling restrained round-end type steel pipe concrete pier is arranged at the central position of the reinforced concrete bearing platform, the depth of the groove is the embedding depth of the pier, the side wall of the groove is formed by a metal corrugated sleeve fixedly embedded with the reinforced concrete bearing platform, and the buckling restrained round-end type steel pipe concrete pier is temporarily fixed with the reinforced concrete bearing platform through an embedded bolt; the inner contour of the horizontal projection of the metal corrugated sleeve is similar to the outer contour of the horizontal projection of the buckling restrained round end type concrete filled steel tube bridge pier, the outer contour of the horizontal projection of the buckling restrained round end type concrete filled steel tube bridge pier is smaller than the inner contour of the horizontal projection of the metal corrugated sleeve, and fiber reinforced cement is filled between the buckling restrained round end type concrete filled steel tube bridge pier and the metal corrugated sleeve.
The rubber cushion layer is embedded between the bottom surface of the steel ferrule and the upper plane of the fiber reinforced cement.
The invention relates to a construction method of a connection structure of a buckling restrained round-end concrete-filled steel tube pier and a bearing platform, which comprises the following steps of:
step one, prefabricating a round end-shaped steel pipe in a factory: manufacturing end plates according to the design size, wherein 1 anchor bolt hole is respectively arranged on each of two sides of each end plate along the transverse bridge direction of the bridge pier; processing two flat steel plates and two semi-circular steels which are formed by cold bending and have the same shape according to the design size, welding the two flat steel plates and the two semi-circular steels by adopting butt welding seams, and welding an upper end plate at the bottom by adopting fillet welding seams, thereby forming a steel structure part of the buckling restrained round-end type steel pipe concrete pier;
step two, prefabricating a reinforced concrete bearing platform in a factory: binding a steel reinforcement cage according to the design size of a reinforced concrete bearing platform, arranging a metal corrugated sleeve at the embedding position of a pier to reserve an embedding space for the pier before pouring the reinforced concrete bearing platform, wherein the section size of the metal corrugated sleeve is larger than the size of an end plate at the bottom of the pier, and the height of the metal corrugated sleeve is the embedding depth of the pier; arranging an embedded anchor bolt at a position aligned with the anchor bolt hole on the end plate; pouring concrete to obtain a prefabricated reinforced concrete bearing platform;
step three, installing the reinforced concrete bearing platform prefabricated in the step two according to a design position on a construction site, enabling the steel structure part of the buckling restrained round-ended concrete-filled steel tube pier manufactured in the step one to be vertically arranged in a metal corrugated sleeve in the reinforced concrete bearing platform according to the end plate, aligning the embedded anchor bolt with the anchor bolt hole in the end plate, and connecting the steel structure part of the buckling restrained round-ended concrete-filled steel tube pier with the reinforced concrete bearing platform through the anchor bolt connecting piece to enable the round-ended steel tube to be temporarily fixed at the designated position of the pier; then, concrete is poured into the round-end-shaped steel pipe, so that the buckling restrained round-end-shaped steel pipe concrete pier is formed; a gap between the metal corrugated sleeve and the buckling restrained round end type steel pipe concrete bridge pier is filled with fiber reinforced cement;
and step four, after the fiber reinforced cement reaches the strength, coating a Teflon coating on the plastic hinge area at the bottom of the round-end-shaped steel pipe, bonding a rubber cushion layer on the upper plane of the fiber reinforced cement along the periphery of the pier bottom, installing a steel hoop in the plastic hinge area at the bottom of the round-end-shaped steel pipe concrete pier and above the rubber cushion layer, and fastening the steel hoop by using a high-strength bolt.
Further, in the first step, the flat steel plate and the semicircular steel are made of the same material, and any one of ordinary low-carbon steel, weathering steel, high-strength steel with yield strength more than 550MP and stainless steel is selected.
In the third step, the concrete poured into the round end-shaped steel pipe is selected from any one of ordinary concrete, high-strength concrete, recycled concrete and rubber concrete.
And in the fourth step, the steel ferrule is formed by two semicircular end-shaped steel plates in an encircling way, the two semicircular end-shaped steel plates are symmetrical along the long axis of the circular end-shaped steel pipe, the inner diameter of the two semicircular end-shaped steel plates is larger than the outer diameter of the circular end-shaped steel pipe, the height of the two semicircular end-shaped steel plates is equal to the coating height of the Teflon coating, and the two semicircular end-shaped steel plates are connected with the two ends of the bridge pier in the transverse bridge direction through high-strength bolts.
Compared with the prior art, the invention has the beneficial effects that:
1. the performance of steel and concrete materials is fully utilized, the round end-shaped steel pipe has a restraint effect on the concrete, and the compressive strength and ductility of the concrete can be improved. And the concrete material can inhibit the steel pipe from buckling inwards.
2. Under the action of an earthquake, the steel pipe at the bottom of the round end-shaped concrete filled steel tube is easy to bulge outwards locally, the concrete cracks, and the bulge is easy to break due to fatigue, so that the pier is damaged. The steel sleeve hoop at the bottom is added, so that the outward local bulging of the steel pipe can be effectively inhibited, the ductility of the bridge pier is improved, and the bridge collapse caused by the damage of the bridge pier is prevented.
3. The existing pier form is difficult to repair after earthquake, and if the steel hoop at the bottom of the pier is seriously deformed under the action of strong earthquake, the steel hoop can be directly unloaded to replace a new steel hoop, so that the repair after the earthquake is more convenient.
Compared with the existing bridge pier construction method, the rapid construction method for connecting the bridge pier and the bearing platform is simple and convenient in construction, small in field workload and wet operation, capable of realizing connection of the prefabricated bridge pier and the bearing platform, and good in seismic performance of the connection node. And a formwork is not required in the construction process, so that the construction period is favorably shortened, and the construction method has good economic benefit.
Drawings
FIG. 1 is a top view of a concrete-filled steel tube pier and a bearing platform with a buckling restrained circular end according to the present invention;
FIG. 2 is a schematic view of a round end steel tube and end plate according to the present invention;
FIG. 3 is a schematic view of a prefabricated platform according to the present invention;
FIG. 4 is a schematic view of the connection structure of the round end-shaped steel pipe and the bearing platform according to the present invention;
FIG. 5 is a schematic view illustrating the connection between a round end-shaped concrete filled steel tube pier and a bearing platform according to the present invention;
fig. 6 is a schematic view of a buckling restrained round end type steel pipe concrete pier structure according to the present invention.
In the figure:
1-round end shaped steel pipe 2-concrete 3-steel hoop
4-rubber cushion 5-end plate 6-Teflon coating
7-bearing platform 8-metal corrugated sleeve 9-semicircular steel plate
10-flat steel plate 11-anchor bolt hole 12-embedded anchor bolt
13-fiber reinforced cement 14-high-strength bolt 91-weld
Detailed Description
The technical solutions of the present invention are further described in detail with reference to the accompanying drawings and specific embodiments, which are only illustrative of the present invention and are not intended to limit the present invention.
The buckling restrained round-end type steel pipe concrete pier provided by the invention comprises a round-end type steel pipe 1, wherein the round-end type steel pipe 1 is formed by welding two identical cold-bending formed semicircular steel plates 9 and two flat steel plates 10 by adopting butt welding seams; the bottom of the round end-shaped steel pipe 1 is welded with an end plate 5, and the end plate 5 and the round end-shaped steel pipe 1 are welded by adopting an angle welding seam; 1 anchor bolt hole 11 is respectively reserved at two ends of the end plate 5 along the transverse bridge, and concrete 2 is filled inside the round end-shaped steel pipe 1, as shown in fig. 1 and 5. The lower part of the round-end-shaped steel pipe 1 is sequentially provided with a Teflon coating 6 and a steel ferrule 3 from inside to outside, and the bottom of the steel ferrule 3 is provided with a rubber cushion layer 4 as shown in figure 6. The steel hoop 3 is formed by two hoops which are fastened by high-strength bolts 14, as shown in fig. 1 and 6.
The buckling restrained round-end type steel pipe concrete bridge pier and bearing platform connecting structure is characterized in that as shown in figure 1, a bearing platform is a reinforced concrete bearing platform 7, as shown in figure 3, a groove for embedding the buckling restrained round-end type steel pipe concrete bridge pier is arranged in the center of the reinforced concrete bearing platform 7, the depth of the groove is the embedding depth of the bridge pier, the side wall of the groove is formed by a metal corrugated sleeve 8 embedded with the reinforced concrete bearing platform 7, and the buckling restrained round-end type steel pipe concrete bridge pier is temporarily fixed with the reinforced concrete bearing platform 7 through embedded bolts 12; as shown in fig. 1, an inner contour of a horizontal projection of the corrugated metal sleeve 8 is similar to an outer contour of a horizontal projection of the buckling restrained round-ended concrete-filled steel tube pier, the outer contour of the horizontal projection of the buckling restrained round-ended concrete-filled steel tube pier is smaller than the inner contour of the horizontal projection of the corrugated metal sleeve 8, fiber reinforced cement 13 is filled between the buckling restrained round-ended concrete-filled steel tube pier and the corrugated metal tube 8, and as shown in fig. 5 and 6, the rubber pad layer 4 is embedded between a bottom surface of the steel ferrule 3 and an upper plane of the fiber reinforced cement 13, as shown in fig. 6.
According to the construction method of the connection structure of the buckling restrained round-end type steel pipe concrete pier and the bearing platform, the buckling restrained round-end type steel pipe concrete pier and the reinforced concrete bearing platform 7 are connected in an embedded mode through the grouting corrugated sleeves, the pier and the bearing platform can meet requirements of factory prefabrication and field assembly, and rapid construction is achieved. The method comprises the following specific steps:
step one, prefabricating a round end-shaped steel pipe 1 in a factory: manufacturing an end plate 5 according to a design size, and respectively arranging 1 anchor bolt hole 11 on the end plate 5 along two sides of a bridge pier in the transverse bridge direction; processing two flat steel plates 10 and two cold-bending formed semicircular steels 9 with the same shape according to the design size, welding the two flat steel plates 10 and the two semicircular steels 9 by adopting butt welding seams, wherein a welding seam 91 is shown in figure 2, and welding an upper end plate 5 at the bottom by adopting fillet welding seams, so as to form a steel structure part of the buckling restrained round-end type steel pipe concrete pier; the flat steel plate 10 and the semicircular steel 9 are made of the same material, and can be made of common low-carbon steel, weathering steel or high-strength steel with yield strength above 550 MP. If the stainless steel is applied to cross rivers, reservoirs and sea bridges, the stainless steel can be adopted, and the corrosion resistance of the stainless steel is improved.
Step two, prefabricating the reinforced concrete bearing platform 7 in a factory: binding a steel reinforcement cage according to the design size of a reinforced concrete bearing platform 7, arranging a metal corrugated sleeve 8 at the embedding position of a pier to reserve an embedding space for the pier before pouring the reinforced concrete bearing platform 7, wherein the section size of the metal corrugated sleeve 8 is larger than the size of an end plate 5 at the bottom of the pier, and the height of the metal corrugated sleeve 8 is the embedding depth of the pier; and the embedded anchor 12 is arranged at the position aligned with the anchor hole 11 on the end plate 5; pouring concrete to obtain a prefabricated reinforced concrete bearing platform 5;
step three, installing the reinforced concrete bearing platform 7 prefabricated in the step two according to a design position on a construction site, erecting the steel structure part of the buckling restrained round-ended concrete-filled steel tube bridge pier prepared in the step one in a metal corrugated sleeve 8 in the reinforced concrete bearing platform 7 according to the condition that the end plate 5 faces downwards, aligning the embedded anchor bolts 12 with the anchor bolt holes 11 in the end plate 5, and connecting the steel structure part of the buckling restrained round-ended concrete-filled steel tube bridge pier with the reinforced concrete bearing platform 7 through anchor bolt connecting pieces to temporarily fix the round-ended steel tube 1 at the designated position of the bridge pier; then, pouring concrete 2 into the round-end-shaped steel pipe 1 to inhibit the steel pipe from buckling inwards, thereby forming a buckling-restrained round-end-shaped steel pipe concrete pier; the concrete 2 poured into the round end-shaped steel pipe 1 can be ordinary concrete, high-strength concrete and the like, and can also be environment-friendly materials such as recycled concrete, rubber concrete and the like. And a gap between the metal corrugated sleeve 8 and the buckling restrained round end type steel pipe concrete pier is filled with fiber reinforced cement 13.
Step four, after the fiber reinforced cement 13 reaches the strength, in the regional coating Teflon coating 6 of 1 bottom plastic hinge of round end shape steel pipe, along the pier bottom bonding rubber cushion 4 all around on the fiber reinforced cement 13 upper plane, rubber cushion 4 inlays the bottom surface of steel ferrule 3 with between the upper plane of fiber reinforced cement 13 to keep apart steel ferrule 3 and cushion cap upper surface, when guaranteeing that steel ferrule 3 suppresses 1 bottom of round end shape steel pipe and outwards bulging, not transmit the moment of flexure and increase system rigidity. Meanwhile, when the pier is prevented from being bent, the bottom steel ferrule 3 is prevented from losing the buckling restraining capacity due to too early deformation caused by extrusion, and the higher requirement on the bearing platform due to overlarge pier bottom rigidity is avoided. The rubber cushion layer 4 is not too high, and the steel pipe wall at the position is prevented from bulging outwards. A steel sleeve hoop 3 is arranged in a bottom plastic hinge area of the buckling-restrained round-end concrete-filled steel tube pier and above the rubber cushion layer 4, and the bottom steel tube is restrained from bulging outwards; the steel ferrule 3 is formed by two semicircular end-shaped steel plates in an encircling mode, the two semicircular end-shaped steel plates are symmetrical along the long axis of the circular end-shaped steel pipe, the inner diameter of the two semicircular end-shaped steel plates is larger than the outer diameter of the circular end-shaped steel pipe 1, the height of the two semicircular end-shaped steel plates is equal to the coating height of the Teflon coating 6, and the two semicircular end-shaped steel plates are connected with the two ends of the bridge pier in the transverse bridge direction through high-strength bolts 14. The steel sleeve hoop 3 is replaceable, if the deformation of the bottom steel sleeve hoop is too large under the action of strong shock, the original steel sleeve hoop can be unloaded to replace a new steel sleeve hoop, and the pier is repaired more conveniently after the shock.
According to the invention, the Teflon coating 6 is added between the steel ferrule 3 and the round-end-shaped steel pipe 1, the Teflon coating 6 has the characteristics of high lubrication and small friction coefficient, the steel ferrule 3 and the round-end-shaped steel pipe 1 can be isolated, the steel ferrule 3 is prevented from bearing vertical axial force and only bears transverse force, the buckling of the round-end-shaped steel pipe 1 is restrained, and the steel ferrule 3 can fully exert horizontal restraining force on the round-end-shaped steel pipe concrete pier.
According to the invention, the pier and the bearing platform are connected by adopting a grouting metal corrugated sleeve embedded connection method, and the pier and the bearing platform can meet the requirements of factory prefabrication, field assembly and rapid construction. The invention has good anti-seismic performance and large transverse rigidity, the steel hoops can effectively inhibit the bulging and bending of the bottom steel pipe, the ductility of the bridge pier is improved, the construction is convenient, the field workload and wet operation are less, the repair is easy, and the invention can be applied to the bridge pier structure of major bridge engineering
Although the present invention has been described in connection with the accompanying drawings, the present invention is not limited to the above-described embodiments, which are intended to be illustrative rather than restrictive, and many modifications may be made by those skilled in the art without departing from the spirit of the present invention as disclosed in the appended claims.
Claims (6)
1. The utility model provides a bucking connection structure of restraining round end type steel pipe concrete pier and cushion cap, the cushion cap is reinforced concrete cushion cap (7), and the structure of bucking round end type steel pipe concrete pier is: the pier comprises a round-end-shaped steel pipe (1), wherein the round-end-shaped steel pipe (1) is formed by welding two identical cold-bending formed semicircular steel plates (9) and two identical flat steel plates (10) by adopting butt welding seams; the bottom of the round end-shaped steel pipe (1) is welded with an end plate (5), and the end plate (5) and the round end-shaped steel pipe (1) are welded by adopting a fillet weld; 1 anchor bolt hole (11) is reserved at each end of the end plate (5) along the transverse bridge direction, and concrete (2) is filled in the inner side of the round end-shaped steel pipe (1); a Teflon coating (6) and a steel ferrule (3) are sequentially arranged in a plastic hinge area at the lower part of the round-end-shaped steel pipe (1) from inside to outside, and a rubber cushion layer (4) is arranged at the bottom of the steel ferrule (3);
the reinforced concrete pier is characterized in that a groove for embedding the buckling-restrained round-end type steel pipe concrete pier is arranged at the central position of the reinforced concrete bearing platform (7), the depth of the groove is the embedding depth of the pier, the side wall of the groove is formed by a metal corrugated sleeve (8) which is embedded and fixed with the reinforced concrete bearing platform (7), and the buckling-restrained round-end type steel pipe concrete pier is temporarily fixed with the reinforced concrete bearing platform (7) through an embedded anchor bolt (12); the inner contour of the horizontal projection of the metal corrugated sleeve (8) is similar to the outer contour of the horizontal projection of the buckling-restrained round-end concrete-filled steel tube bridge pier, the outer contour of the horizontal projection of the buckling-restrained round-end concrete-filled steel tube bridge pier is smaller than the inner contour of the horizontal projection of the metal corrugated sleeve (8), and fiber reinforced cement (13) is filled between the buckling-restrained round-end concrete-filled steel tube bridge pier and the metal corrugated sleeve (8).
2. The buckling restrained round-ended concrete-filled steel tube pier and cap connection structure as claimed in claim 1, wherein the rubber pad layer (4) is embedded between the bottom surface of the steel ferrule (3) and the upper plane of the fiber reinforced cement (13).
3. The construction method of the connection structure of the buckling restrained round end type steel pipe concrete pier and the bearing platform as claimed in claim 1 or 2, characterized by comprising the steps of:
firstly, prefabricating a round end-shaped steel pipe (1) in a factory: manufacturing an end plate (5) according to a designed size, and respectively arranging 1 anchor bolt hole (11) on the end plate (5) along the two sides of the transverse bridge of the pier; processing two flat steel plates (10) and two cold-bending formed semicircular steels (9) with the same shape according to the design size, welding the two flat steel plates (10) and the two semicircular steels (9) by adopting butt weld joints, and welding an upper end plate (5) at the bottom by adopting fillet weld joints, thereby forming a steel structure part of the round-end steel pipe concrete pier with buckling inhibition;
step two, prefabricating the reinforced concrete bearing platform (7) in a factory: binding a steel reinforcement cage according to the design size of a reinforced concrete bearing platform (7), arranging a metal corrugated sleeve (8) at the embedding position of a pier to reserve an embedding space for the pier before the reinforced concrete bearing platform (7) is poured, wherein the section size of the metal corrugated sleeve (8) is larger than the size of an end plate (5) at the bottom of the pier, and the height of the metal corrugated sleeve (8) is the embedding depth of the pier; and arranging an embedded anchor bolt (12) at a position aligned with the anchor bolt hole (11) on the end plate (5); pouring concrete to obtain a prefabricated reinforced concrete bearing platform (7);
step three, installing the reinforced concrete bearing platform (7) prefabricated in the step two according to a design position on a construction site, erecting the steel structure part of the buckling restrained round-ended concrete-filled steel tube pier prepared in the step one in a metal corrugated sleeve (8) in the reinforced concrete bearing platform (7) according to the end plate (5) downwards, aligning the embedded anchor bolt (12) with the anchor bolt hole (11) in the end plate (5), and connecting the steel structure part of the buckling restrained round-ended concrete-filled steel tube pier with the reinforced concrete bearing platform (7) through the anchor bolt connecting piece to temporarily fix the round-ended steel tube (1) at the designated position of the pier; then, concrete (2) is poured into the round-end-shaped steel pipe (1), so that the buckling restrained round-end-shaped steel pipe concrete pier is formed; a gap between the metal corrugated sleeve (8) and the buckling restrained round-end concrete-filled steel tube pier is filled with fiber reinforced cement (13);
and step four, after the fiber reinforced cement (13) reaches the strength, coating a Teflon coating (6) on a plastic hinge region at the bottom of the round-end-shaped steel pipe (1), bonding a rubber cushion layer (4) on the upper plane of the fiber reinforced cement (13) along the periphery of the pier bottom, installing a steel hoop (3) in the plastic hinge region at the bottom of the round-end-shaped steel pipe concrete pier and above the rubber cushion layer (4) and fastening the steel hoop by using a high-strength bolt (14).
4. The construction method of the connection structure between the round-ended concrete-filled steel tube pier and the bearing platform according to claim 3, wherein in the third step, the concrete (2) poured into the round-ended steel tube (1) is selected from any one of ordinary concrete, high-strength concrete, recycled concrete and rubber concrete.
5. The construction method of the connection structure of the buckling restrained round end type steel tube concrete pier and the bearing platform as claimed in claim 3, characterized in that in the first step, the flat steel plate (10) and the semicircular steel (9) are made of the same material.
6. The construction method of the connection structure of the buckling restrained round-ended concrete-filled steel tube pier and the bearing platform as claimed in claim 3, characterized in that in the fourth step, the steel hoops (3) are formed by two half round-ended steel plates which are embraced, are symmetrical along the long axis of the round-ended steel tube, have the inner diameter larger than the outer diameter of the round-ended steel tube (1) and have the height equal to the coating height of the Teflon coating (6), and are connected with the two ends of the pier in the transverse bridge direction through high-strength bolts (14).
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| CN108457172A (en) * | 2018-04-03 | 2018-08-28 | 中国建筑第五工程局有限公司 | Assembling type girder bridge and construction method |
| CN108505433B (en) * | 2018-04-27 | 2023-11-21 | 福建工程学院 | Pier structure and construction method thereof |
| CN112458908B (en) * | 2020-11-12 | 2022-04-01 | 北京城建道桥建设集团有限公司 | Construction method for steel hoops of pier anti-seismic facility in two-step accurate-in-place mode |
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| KR100713692B1 (en) * | 2005-08-17 | 2007-05-04 | 고려대학교 산학협력단 | A prestresed connection set bridge post using unit filled concrete with internally confined hollow and a method for construction |
| KR101034185B1 (en) * | 2010-12-15 | 2011-05-12 | 콘비젼스 주식회사 | Bridge for bike-lane and construction method thereof |
| CN105908621B (en) * | 2016-06-29 | 2017-12-22 | 北京工业大学 | It is a kind of to damage controllable Self-resetting precast segment steel-pipe assembly concrete pier and the practice |
| CN106758789A (en) * | 2016-12-30 | 2017-05-31 | 中铁第四勘察设计院集团有限公司 | High-speed railway steel concrete assembled pier and its construction method |
| CN207130606U (en) * | 2017-06-26 | 2018-03-23 | 天津大学 | Flexing suppress round end type concrete pier of steel tube and with cushion cap attachment structure |
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2017
- 2017-06-26 CN CN201710499667.4A patent/CN107386098B/en active Active
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