CN116575317A - Connection structure and connection method of capping beam and bridge pier - Google Patents
Connection structure and connection method of capping beam and bridge pier Download PDFInfo
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- CN116575317A CN116575317A CN202310834536.2A CN202310834536A CN116575317A CN 116575317 A CN116575317 A CN 116575317A CN 202310834536 A CN202310834536 A CN 202310834536A CN 116575317 A CN116575317 A CN 116575317A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 63
- 230000002787 reinforcement Effects 0.000 claims abstract description 31
- 238000010276 construction Methods 0.000 claims abstract description 28
- 239000011374 ultra-high-performance concrete Substances 0.000 claims abstract description 28
- 238000009415 formwork Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 77
- 239000010959 steel Substances 0.000 claims description 77
- 239000004567 concrete Substances 0.000 claims description 22
- 238000003466 welding Methods 0.000 claims description 14
- 238000004873 anchoring Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 2
- 230000001771 impaired effect Effects 0.000 abstract 1
- 239000003351 stiffener Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000008093 supporting effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
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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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- 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 application discloses a connection structure and a connection method of a capping beam and a pier, comprising the capping beam and the pier; the annular connecting piece is embedded in the position of the bent cap corresponding to the bridge pier, and a first reinforcing piece is arranged on the inner wall of the annular connecting piece; the outer wall of the annular connecting piece is provided with a second reinforcing piece; the spliced pole that is used for inserting annular connecting piece is preset at the middle part of pier, and the outer wall of spliced pole is equipped with the third reinforcement, and first reinforcement and third reinforcement staggered arrangement, cooperation are pour the ultra-high performance concrete between annular connecting piece and spliced pole, can be with bent cap and pier fixed connection. This connection structure of bent cap and pier adopts annular connecting piece and spliced pole to cooperate the assembly, can guarantee connection quality, makes the bent cap can not be pulled out easily because of receiving eccentric force, eccentric moment, and the pier provides sufficient holding power for the bent cap, reduces the junction and impaired because of bearing too big exogenic action, and the connection process is simple and convenient, does not need on-the-spot formwork, easily construction, reducible construction period.
Description
Technical Field
The application relates to the technical field of bridge construction, in particular to a connection structure and a connection method of a capping beam and a pier.
Background
Along with the high-speed development of the economy in China, the requirement for accelerating the bridge construction is more and more strong. While guaranteeing the construction quality of the bridge, the technical staff in the field are constantly exploring in the directions of shortening the construction period, simplifying the construction procedure, saving the construction cost and the like. In the prior art, in order to improve the construction efficiency of a bridge substructure and shorten the construction period, an assembled bridge is generally adopted in bridge construction. In the construction of an assembled bridge, the prefabricated capping beam and the bridge pier are key components for transmitting internal forces of an upper structure and a lower structure of the bridge, the stress condition of a connecting node between the prefabricated capping beam and the bridge pier is complex, and the safety performance and the durability of a main structure of the bridge are greatly influenced. The existing connection mode of the prefabricated capping beam and the bridge pier mainly comprises prestress connection, grouting sleeve connection, grouting corrugated pipe connection, slot connection, plug-in connection and wet joint connection. However, the conventional connection method between the prefabricated capping beam and the pier has the following technical problems: the joint is easy to crack, the structure is complex, the workload is large, and the construction period is long.
Therefore, how to provide a connection structure and a connection method for a capping beam and a pier, simplify the construction process of the capping beam and the pier, enhance the structural integrity, avoid cracking of the connection part, and solve the technical problem that is needed to be solved by the person skilled in the art.
Disclosure of Invention
In order to solve the technical problems, the application provides the connection structure and the connection method for the capping beam and the bridge pier, which strengthen the integrity of the connection structure of the capping beam and the bridge pier, avoid the generation of cracks at the connection part, ensure the connection quality, ensure that the capping beam is not easy to pull out from the bridge pier, simplify and facilitate the construction process, reduce the construction difficulty and help to shorten the construction period.
The technical scheme provided by the application is as follows:
a connection structure of a capping beam and a pier comprises a prefabricated capping beam and a pier;
the position of the capping beam corresponding to the bridge pier is pre-embedded with an annular connecting piece along the vertical direction, the annular connecting piece penetrates through the capping beam, a first reinforcing piece is fixedly arranged on the inner wall of the annular connecting piece, a second reinforcing piece is fixedly arranged on the outer wall of the annular connecting piece, and the second reinforcing piece is pre-embedded in the capping beam;
the middle part of pier in advance be equipped with the spliced pole that annular connecting piece assembled mutually, the spliced pole exceeds the top surface of pier for insert annular connecting piece, the outer wall of spliced pole is fixed to be equipped with the third reinforcement, first reinforcement with the third reinforcement is in the bent cap with be the staggered arrangement after the pier is assembled, and the cooperation is pour annular connecting piece with ultra-high performance concrete between the spliced pole can be with bent cap and pier fixed connection.
Further, the first reinforcing member and the second reinforcing member are perpendicular to the side wall of the annular connecting member, and the third reinforcing member is perpendicular to the side wall of the connecting column.
Further, the annular connecting piece is a first steel pipe.
Further, the connecting column comprises a second steel pipe and concrete poured inside the second steel pipe, and the length of the second steel pipe higher than the pier is equal to the height of the annular connecting piece.
Further, the length of the second steel pipe embedded in the pier is greater than or equal to 2 times of the diameter of the second steel pipe.
Further, the inner diameter of the circumference of the first reinforcement is larger than the outer diameter of the connecting column, and the outer diameter of the circumference of the third reinforcement is smaller than the inner diameter of the annular connecting piece.
Further, the difference between the radius of the annular connector and the radius of the connecting post is less than the sum of the lengths of the first and third stiffeners.
A connection method of a capping beam and a pier is used for constructing a connection structure of the capping beam and the pier, and comprises the following steps:
s1, providing a capping beam and a pier;
s2, firstly installing the bridge pier at a construction destination, then installing the bent cap on the bridge pier, enabling a connecting column of the bridge pier to be inserted into an annular connecting piece of the bent cap, and arranging the first reinforcing piece and the third reinforcing piece in a staggered manner;
and S3, pouring ultra-high performance concrete between the annular connecting piece and the connecting column, and completing connection of the capping beam and the pier after the ultra-high performance concrete is solidified.
Further, in the step S1, the capping beam is prefabricated, specifically:
and building a template of the capping beam, vertically fixing an annular connecting piece at a position connected with the bridge pier, enabling the annular connecting piece to penetrate through the capping beam, welding a first reinforcing piece on the inner wall of the annular connecting piece, welding a second reinforcing piece on the outer wall of the annular connecting piece, and pouring concrete outside the annular connecting piece and in a die of the capping beam to form the prefabricated capping beam.
Further, in the step S1, the bridge pier is prefabricated, specifically:
building a formwork of the bridge pier, vertically fixing a second steel pipe at the center of the upper part of the bridge pier, anchoring the second steel pipe in the bridge pier, wherein the length of the second steel pipe is greater than or equal to 2 times of the diameter of the second steel pipe, the length of the second steel pipe higher than the top of the bridge pier is equal to the height of the annular connecting piece, welding a third reinforcing piece on the outer wall of the second steel pipe, and pouring concrete in the die of the bridge pier and the second steel pipe to form the bridge pier with a connecting column at the top.
According to the connection structure and the connection method of the capping beam and the bridge pier, the annular connecting piece and the connecting column are adopted for assembly, the first reinforcing piece and the third reinforcing piece are matched, the ultra-high performance concrete is poured between the annular connecting piece and the connecting column, after the ultra-high performance concrete is hardened, the capping beam and the bridge pier are fixedly connected, and compared with the prior art, the connection structure and the connection method of the capping beam and the bridge pier are higher in integral performance, the connection quality can be ensured, the capping beam cannot be easily pulled out from the bridge pier due to eccentric force and eccentric bending moment, the outer diameter of the bridge pier is larger than the outer diameter of the connecting column, the bridge pier can provide supporting force for the capping beam, the connection pressure of joints can be reduced, the wet connection crack between the capping beam and the bridge pier can be effectively avoided, in-situ formwork supporting is not needed, the construction process is simplified, the construction difficulty is reduced, and the construction period is shortened to a great extent.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
Fig. 1 is a schematic structural view of a connection structure between a capping beam and a pier in an embodiment of the present application;
FIG. 2 is a cross-sectional view of a roof rail in an embodiment of the application;
FIG. 3 is a top view of a roof rail according to an embodiment of the present application;
FIG. 4 is a front view of a pier according to an embodiment of the present application;
FIG. 5 is a top view of an abutment according to an embodiment of the present application;
fig. 6 is a top view of a connection structure between a capping beam and a pier in an embodiment of the application.
Reference numerals: the bridge comprises a capping beam 1, a bridge pier 2, an annular connecting piece 3, a first reinforcing piece 4, a second reinforcing piece 5, a connecting column 6 and a third reinforcing piece 7.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the application to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the application, are included in the spirit and scope of the application which is otherwise, without departing from the spirit or scope thereof.
It should be noted that, the drawings in the present disclosure are only schematic diagrams of structures, and in fig. 1 to 6, the width of the capping beam 1 and the diameter of the annular connecting member 3 all meet the requirements of strength and safety performance of the capping beam 1, and the diameter of the bridge pier 2 and the diameter of the connecting post 6 also meet the requirements of strength and safety performance of the bridge pier 2.
As shown in fig. 1 to 6, an embodiment of the present application provides a connection structure of a capping beam and a pier, including a capping beam 1 and a pier 2; the position of the capping beam 1 corresponding to the bridge pier 2 is pre-embedded with an annular connecting piece 3 along the vertical direction, the annular connecting piece 3 penetrates through the capping beam 1, a first reinforcing piece 4 is fixedly arranged on the inner wall of the annular connecting piece 3, a second reinforcing piece 5 is fixedly arranged on the outer wall of the annular connecting piece 3, and the second reinforcing piece 5 is pre-embedded in the capping beam 1; the middle part of pier 2 is equipped with in advance with spliced pole 6 that annular connecting piece 3 assembled mutually, spliced pole 6 exceeds the top surface of pier 2, is used for inserting annular connecting piece 3, the outer wall of spliced pole 6 is fixed to be equipped with third reinforcement 7, first reinforcement 4 with third reinforcement 7 be the staggered arrangement after cap beam 1 with pier 2 is assembled, and the cooperation is pour annular connecting piece 3 with ultra-high performance concrete between spliced pole 6 can be with cap beam 1 and pier 2 fixed connection.
According to the connecting structure of the capping beam 1 and the bridge pier 2, the second reinforcing piece 5 is uniformly arranged on the outer wall of the annular connecting piece 3, the second reinforcing piece 5 is embedded in the capping beam 1, the first reinforcing piece 4 is uniformly arranged on the inner wall of the annular connecting piece 3, the length of the first reinforcing piece 4 is equal to that of the second reinforcing piece 5, the third reinforcing piece 7 is uniformly arranged on the outer wall of the connecting column 6, the connecting column 6 is inserted into the annular connecting piece 3 to be assembled, the third reinforcing piece 7 on the connecting column 6 and the first reinforcing piece 4 on the annular connecting piece 3 are arranged in a staggered mode, collision between the first reinforcing piece 4 and the third reinforcing piece 7 is avoided, ultra-high-performance concrete is poured between the annular connecting piece 3 and the connecting column 6, after the ultra-high-performance concrete is solidified, so that the capping beam 1 is fixedly connected with the bridge pier 2, the connection between the capping beam 1 and the bridge pier 2 comprises the ultra-high-performance concrete connection at the joint between the connecting column 6 and the annular connecting piece 3, the bonding force between the first reinforcing piece 4 and the third reinforcing piece 7 and the ultra-high-performance concrete are enhanced, and the bridge pier 1 are improved in performance due to the pin-cap beam 1 and the bridge pier 1. Meanwhile, the second reinforcing piece 5 uniformly welded on the outer wall of the annular connecting piece 3 is embedded into the concrete of the bent cap 1, so that the connection strength of the annular connecting piece 3 and the bent cap 1 is enhanced, and the bent cap 1 and the annular connecting piece 3 cannot be pulled out of the bent cap 1 easily when bearing loads such as eccentric force, eccentric bending moment and the like. Wherein, the ultra-high performance concrete preferably adopts micro-expansion ultra-high performance concrete, and after pouring is completed, the micro-expansion concrete can expand to a certain extent, so that the filling is more compact, and the connection strength between the annular connecting piece 3 and the connecting column 6 can be enhanced.
In the prior art, a grouting sleeve connection mode is adopted, so that the problems of stress concentration, early cracking at joints, concentrated damage and the like are easy to occur; the grouting corrugated pipe connection mode has the advantages that the rigidity of the corrugated pipe is small, the stress deformation is large when concrete is poured, and the phenomenon of steel bar pulling out is easy to occur; the plug-and-socket type connection has the defects of large insertion depth, poor durability, complex arrangement of the reinforcing steel bars, slow construction progress and the like in other modes.
Compared with the prior art, the connection structure of the bent cap 1 and the bridge pier 2 provided by the embodiment enhances the connection strength of the bent cap 1 and the bridge pier 2, can ensure the connection quality, effectively avoids the problem that the existing wet connection part is easy to crack, ensures that the bent cap 1 cannot be pulled out of the bridge pier 2 due to eccentric force and eccentric bending moment, ensures that the outer diameter of the bridge pier 2 is larger than that of the connecting column 6, can provide larger supporting force for the bent cap 1, can reduce the connection pressure of the joint of the connecting column 6 and the annular connecting piece 3, and enhances the structural stability. In addition, the reinforcement arranged at the joint of the capping beam 1 and the pier 2 can be greatly reduced, the connection process is simple and convenient, the construction process is simplified, the construction difficulty is reduced, and the construction period is shortened to a great extent.
Preferably, the first reinforcement member 4 and the second reinforcement member 5 are perpendicular to the side wall of the annular connecting member 3, and the third reinforcement member 7 is perpendicular to the side wall of the connecting column 6. The annular connecting member 3 may be elliptical, square or polygonal, in this embodiment, the annular connecting member 3 is preferably circular, the shape of the connecting post 6 is matched with the shape of the annular connecting member 3, the first reinforcing member 4 and the third reinforcing member 7 may be studs, bolts, rivets or other rigid members with high short columnar strength, in this embodiment, the first reinforcing member 4, the second reinforcing member 5 and the third reinforcing member 7 may be bolts, the inner wall and the outer wall of the annular connecting member 3 are vertically welded with bolts, the outer wall of the connecting post 6 is vertically welded with bolts, the welding mode of the bolts is specifically to vertically weld the screw ends of the bolts on the inner wall and the outer wall of the annular connecting member 3 or the outer wall of the connecting post 6, and the inner wall and the outer wall of the annular connecting member 3 are uniformly provided with a plurality of bolts, and the corresponding positions of the outer wall of the connecting post 6 are uniformly provided with a plurality of bolts, so that the connecting post 6 and the bolts thereon can be smoothly inserted into the annular connecting member 3 in a staggered manner.
In the existing assembled bridge, the force is transmitted from the upper structure to the lower structure of the bridge, and the capping beam 1 is connected with the bridge pier 2 by adopting a grouting sleeve, so that the force on the capping beam 1 is transmitted to the bridge pier 2 by virtue of reserved steel bars; the capping beam 1 is connected with the bridge pier 2 in a plug-and-socket manner, and the force on the capping beam 1 is transmitted to the bridge pier 2 by means of the bridge pier 2.
In the connection structure between the capping beam 1 and the bridge pier 2 adopted in the embodiment, the bolts welded on the bridge pier 2 and the capping beam 1 are bonded with the poured ultra-high performance concrete, the bonding area is approximately equal to the extension length of the bolts multiplied by the perimeter of the section of the bolts, the bolts welded on the annular connecting piece 3 and the bolts on the connecting post 6 are used for transmitting moment, and the bolts welded on the capping beam 1 and the bridge pier 2 are used for transmitting the moment to the concrete and then transmitting the moment to the bridge pier 2. Since the bonding strength between the bolt and the concrete is high, the bond is basically impossible to break, and the push-out test research shows that the bolt is welded on the steel plate and embedded into the ultra-high performance concrete, the final failure mechanism is basically sheared and broken at the welding root of the bolt, and the contact part of the ultra-high performance concrete and the bolt only has few cracks, namely the bonding strength of the bolt and the ultra-high performance concrete can be larger than the strength of the bolt. The annular connecting piece 3 of the bent cap 1 provided by the embodiment is uniformly welded with a plurality of bolts, the connecting column 6 is also uniformly welded with a plurality of bolts, the bolts are staggered, the bolts are more in number and cannot be easily damaged, and therefore, the bridge pier 2 and the bent cap 1 cannot be separated, so that the connecting structure of the bent cap 1 and the bridge pier 2 in the embodiment is high in strength, high in structural integrity strength, good in pulling resistance and not easy to damage.
In order to provide the connection structure of the cap beam 1 and the bridge pier 2 with feetThe number of the bolts arranged on the annular connecting piece 3 and the connecting column 6 is larger than or equal to a certain valueThe determination is made according to the following equation:
(a) The denominator is->And->The smaller of the two values is the one,
wherein, the liquid crystal display device comprises a liquid crystal display device,the number of the bolts is the number of the bolts,Nfor the actual bearing capacity of the structure obtained by field measurements or the like, < >>Shear load capacity for single bolt>Is the compressive load bearing capacity that a single bolt can bear.
Furthermore, according to the specification 11.4.1 of GB 50017-2017 of the design standard of a steel structure, the calculation formula of the shearing bearing capacity of a single bolt is known:
(b)，
(c)，
wherein, the liquid crystal display device comprises a liquid crystal display device,the number of sheared faces is->Is of bolt diameter->Design value for shear strength of bolt>For a smaller value of the total thickness of the pressure-bearing member in one of the different force-bearing directions, +.>For the design value of the bearing strength of the bolt +.>And->Taking the smaller value of the calculated result in equation (b) or (c).
As shown in fig. 2 and 3, the annular connecting piece 3 is a first steel pipe, the first reinforcing piece 4 is uniformly and fixedly arranged on the inner wall of the first steel pipe, and the second reinforcing piece 5 is uniformly and fixedly arranged on the inner wall of the first steel pipe. When the first steel pipe is circular and the capping beam 1 is prefabricated, the first steel pipe is fixed at the position connected with the bridge pier 2 in the template mounting stage, bolts are welded on the vertical pipe wall of the inner wall of the first steel pipe, bolts are welded on the vertical pipe wall of the outer wall of the first steel pipe, and concrete is poured on the outer side of the first steel pipe to form the capping beam 1 structure penetrated by the first steel pipe.
In this embodiment, the structure of the connection column 6 is described, as shown in fig. 4 and 5, the connection column 6 includes a second steel pipe and concrete poured inside the second steel pipe, and the length of the second steel pipe higher than the pier 2 is equal to the height of the annular connecting piece 3. When prefabricating the pier 2, the template of pier 2 is built earlier to be provided with the second steel pipe in the fixed position of pier 2 top central point, can be provided with the reinforcing bar inside the second steel pipe as required, to pier 2 template and the inside concrete casting of second steel pipe, pier 2 top center forms the spliced pole 6 that cross-sectional area is less than pier 2 area, namely second steel pipe and the concrete of inside watering, and the height that spliced pole 6 exceeds pier 2 planar equals the length of bent cap 1 annular connecting piece 3, and in the annular connecting piece 3 of bent cap 1 was inserted to pier 2 top spliced pole 6, spliced pole 6 just aligns with annular connecting piece 3 after inserting, does not have the difference in height. The steel pipe concrete structure has been utilized well to spliced pole 6, compares with ordinary reinforced concrete, and this spliced pole 6 simple structure, intensity is higher, is convenient for realize the spliced pole 6 and is connected with bent cap 1 to have higher joint strength. After the connecting column 6 is inserted into the capping beam 1, as the cross-sectional area of the bridge pier 2 is larger than that of the annular connecting piece 3 of the capping beam 1, and the diameter of the bridge pier 2 is almost equal to the width of the capping beam 1, the diameter of the bridge pier 2 can be larger than or equal to the width of the capping beam 1, the bridge pier 2 can provide better support for the capping beam 1, the overall stability of the connecting structure of the capping beam 1 and the bridge pier 2 is enhanced, the capping beam 1 cannot be damaged by penetrating through the bridge pier 2, and the capping beam 1 extends out of the cantilever of the bridge pier 2, under the load transferred by the dead weight and the upper structure of the capping beam 1, the root stress of the cantilever is larger, and under the action of a negative bending moment, the bridge pier 2 has better supporting effect on the capping beam 1, and the stress born by the root of the cantilever can be shared to a great extent, so that the characteristics of better stress capability of the concrete bridge pier 2 can be exactly utilized.
In order to ensure the strength of the connection between the connecting column 6 and the bridge pier 2, the length of the second steel pipe embedded in the bridge pier 2 is greater than or equal to 2 times the diameter of the second steel pipe. In this embodiment, the length of the second steel pipe anchored into the pier 2 is preferably 2 times the diameter of the second steel pipe, that is, the depth of the bottom surface of the second steel pipe below the plane of the pier 2 is 2 times the diameter of the second steel pipe. The surface welding of second steel pipe has a certain number of bolts, and the bolt is perpendicular to the surface of second steel pipe. The depth of the second steel pipe extending into the pier 2 is large, so that the lower part of the second steel pipe is firmly connected with the pier 2, and the stability of the connecting structure between the bent cap 1 and the pier 2 is enhanced.
In order to smoothly insert the connecting post 6 into the annular connecting member 3, as shown in fig. 2 and 4, the inner diameter of the circumference of the first reinforcing member 4 is larger than the outer diameter of the connecting post 6, and the outer diameter of the circumference of the third reinforcing member 7 is smaller than the inner diameter of the annular connecting member 3. In this embodiment, the annular connecting member 3 has an inner diameter D and the connecting column has an outer diameter Dd, the circumference of the first reinforcement 4 means the circumference of the end of the same circumference of all the first reinforcement 4 near the center of the annular connecting member 3, the inner diameter of the circumference of the first reinforcement 4 isThe circumference of the third reinforcement 7 means the circumference of the end of all third reinforcement 7 at the same circumference, which is far from the end of the connecting column 6, the outside diameter of the circumference of the third reinforcement 7 is +>. When (when)And->The connecting post 6 is easily inserted into the annular connecting member 3.
The present embodiment further optimizes the above solution, wherein the difference between the radius of the annular connecting member 3 and the radius of the connecting post 6 is smaller than the sum of the lengths of the first reinforcing member 4 and the third reinforcing member 7. After the connecting column 6 is inserted into the annular connecting piece 3, the first reinforcing piece 4 and the third reinforcing piece 7 are provided with overlapped staggered parts along the vertical direction, so that the connecting strength between the connecting column 6 and the annular connecting piece 3 is better.
According to the connection structure of the capping beam 1 and the pier 2, the present embodiment correspondingly further provides a connection method of the capping beam 1 and the pier 2, which is used for constructing the connection structure of the capping beam and the pier, and includes the following steps:
s1, providing the capping beam 1 and the bridge pier 2;
prefabricated bent cap 1 and pier 2 in the mill, run through bent cap 1 middle part and be equipped with annular connecting piece 3, annular connecting piece 3's inner wall evenly is fixed with a plurality of first stiffeners 4, evenly be fixed with a plurality of second stiffeners 5 at annular connecting piece's outer wall, second stiffener 5 pre-buried in the bent cap, pier 2 top center is equipped with spliced pole 6, spliced pole 6's outer wall evenly is fixed and is equipped with a plurality of third stiffeners 7, set up first stiffener 4 and third stiffener 7, can strengthen the joint strength between annular connecting piece 3 of bent cap 1 and spliced pole 6 of pier 2.
S2, firstly, installing the prefabricated bridge pier 2 at a construction destination, then installing the bent cap 1 on the bridge pier 2, enabling the connecting column 6 of the bridge pier 2 to be inserted into the annular connecting piece 3 of the bent cap 1, and arranging the first reinforcing piece and the third reinforcing piece in a staggered manner;
in this embodiment, the first reinforcement 4, the second reinforcement 5 and the third reinforcement 7 are preferably bolts, the inner wall of the annular connecting member 3 is vertically welded with bolts, a plurality of bolts are uniformly distributed on the inner wall and the outer wall of the annular connecting member 3, the outer wall of the connecting column 6 is vertically welded with bolts, a plurality of bolts are uniformly distributed on the outer wall of the connecting column 6, the connecting column 6 is inserted into the annular connecting member 3 for assembly, the bolts on the connecting column 6 and the bolts on the annular connecting member 3 are staggered, the bolts on the connecting column 6 are prevented from colliding with the bolts on the annular connecting member 3, and the assembly is smoothly performed.
And S3, pouring ultra-high performance concrete between the annular connecting piece 3 and the connecting column 6, and completing connection of the bent cap 1 and the pier 2 after the ultra-high performance concrete is solidified.
The ultra-high-performance concrete is poured between the annular connecting piece 3 and the connecting post 6, after the ultra-high-performance concrete is solidified, the capping beam 1 is fixedly connected with the pier 2, the connection between the capping beam 1 and the pier 2 comprises the ultra-high-performance concrete connection at the joint between the connecting post 6 and the annular connecting piece 3, and the bonding force and the pin effect between a certain number of bolts welded on the annular connecting piece 3 and the connecting post 6 and the ultra-high-performance concrete can be enhanced, so that the connection performance between the connecting post 6 and the annular connecting piece 3 can be enhanced, the connection strength between the pier 2 and the capping beam 1 is greatly enhanced, and the anti-pulling performance between the capping beam 1 and the pier 2 is improved. The ultra-high performance concrete can also adopt micro-expansion ultra-high performance concrete, and after pouring is completed, the micro-expansion concrete can expand to a certain extent, so that the filling is more compact, and the connection strength between the annular connecting piece 3 and the connecting column 6 can be enhanced.
The embodiment further optimizes the above technical solution, and in the step S1, the capping beam 1 is prefabricated, specifically:
the method comprises the steps of building a template of the bent cap 1, vertically fixing an annular connecting piece at a position connected with a pier 2, enabling the annular connecting piece to penetrate through the bent cap 1, welding a first reinforcing piece 4 on the inner wall of the annular connecting piece, welding a second reinforcing piece 5 on the outer wall of the annular connecting piece, and pouring concrete outside the annular connecting piece 3 and in a die of the bent cap 1 to form the prefabricated bent cap 1.
When prefabricating the bent cap 1, at the position that the die plate stage is connected with pier 2 with annular connecting piece 3 fixed earlier, annular connecting piece 3 is first steel pipe in this embodiment, and the inner wall at first steel pipe has a certain amount of bolts in vertical welding, the outer wall at first steel pipe has a certain amount of bolts in vertical welding, the concrete placement is in the outside of first steel pipe, form the structure that first steel pipe runs through bent cap 1, can strengthen the joint strength of bent cap 1 and pier 2 spliced pole 6.
In this embodiment, preferably, in the step S1, the bridge pier 2 is prefabricated, specifically:
building a template of the bridge pier 2, vertically fixing a second steel pipe at the center of the upper part of the bridge pier 2, anchoring the second steel pipe in the bridge pier 2, wherein the length of the second steel pipe is greater than or equal to 2 times of the diameter of the second steel pipe, the length of the second steel pipe higher than the top of the bridge pier 2 is equal to the height of the annular connecting piece, welding a third reinforcing piece on the outer wall of the second steel pipe, and pouring concrete in the die of the bridge pier 2 and the second steel pipe to form the bridge pier 2 with the connecting column 6 at the top.
When prefabricating the bridge pier 2, firstly building a template of the bridge pier 2, fixedly arranging a second steel pipe at the center of the top of the bridge pier 2, enabling the length of the second steel pipe anchored into the bridge pier 2 to be preferably 2 times of the diameter of the second steel pipe, enabling the lower part of the second steel pipe to be firmly connected with the bridge pier 2, pouring concrete into the template of the bridge pier 2 and the second steel pipe, and forming a connecting column 6 with the cross section area smaller than the area of the bridge pier 2 at the center of the top of the bridge pier 2; the length of the second steel pipe higher than the top of the bridge pier 2 is equal to the height of the first steel pipe, namely the length of the connecting column 6 higher than the plane of the bridge pier 2 is equal to the length of the annular connecting piece 3, the connecting column 6 is inserted into the annular connecting piece 3, and the connecting column 6 is just aligned with the annular connecting piece 3 after the connecting column 6 is inserted, so that no height difference exists; and a certain number of bolts are vertically welded on the surface of the second steel pipe, and the length of the bolts welded on the connecting column 6 is smaller than that of the bolts welded on the annular connecting piece 3, so that the connecting column 6 is smoothly inserted into the annular connecting piece 3.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A connection structure of bent cap and pier, its characterized in that: comprises a capping beam and a bridge pier;
the position of the capping beam corresponding to the bridge pier is pre-embedded with an annular connecting piece along the vertical direction, the annular connecting piece penetrates through the capping beam, a first reinforcing piece is fixedly arranged on the inner wall of the annular connecting piece, a second reinforcing piece is fixedly arranged on the outer wall of the annular connecting piece, and the second reinforcing piece is pre-embedded in the capping beam;
the middle part of pier in advance be equipped with the spliced pole that annular connecting piece assembled mutually, the spliced pole exceeds the top surface of pier for insert annular connecting piece, the outer wall of spliced pole is fixed to be equipped with the third reinforcement, first reinforcement with the third reinforcement is in the bent cap with be the staggered arrangement after the pier is assembled, and the cooperation is pour annular connecting piece with ultra-high performance concrete between the spliced pole can be with bent cap and pier fixed connection.
2. The connection structure of a capping beam and a pier according to claim 1, wherein the first and second reinforcing members are perpendicular to the side walls of the ring-shaped connection member, and the third reinforcing member is perpendicular to the side walls of the connection column.
3. The connection structure of a capping beam and a pier according to claim 2, wherein the ring-shaped connection member is a first steel pipe.
4. The connection structure of a capping beam and a pier according to claim 2, wherein the connection column comprises a second steel pipe and concrete poured inside the second steel pipe, and the length of the second steel pipe higher than the pier is equal to the height of the annular connection member.
5. The connection structure of a capping beam and a pier according to claim 4, wherein the length of the second steel pipe embedded in the pier is greater than or equal to 2 times the diameter of the second steel pipe.
6. The connection structure of a capping beam and a pier according to claim 1, wherein an inner diameter of a circumference of the first reinforcement is larger than an outer diameter of the connection column, and an outer diameter of a circumference of the third reinforcement is smaller than an inner diameter of the ring-shaped connection member.
7. The connection structure of a capping beam and a pier according to claim 6, wherein a difference between a radius of the ring-shaped connection member and a radius of the connection post is smaller than a sum of lengths of the first reinforcement member and the third reinforcement member.
8. A connection method of a cap beam and a pier, characterized by being used for construction of the connection structure of a cap beam and a pier as set forth in any one of claims 1 to 7, comprising the steps of:
s1, providing a capping beam and a pier;
s2, firstly installing the prefabricated bridge pier at a construction destination, then installing the bent cap on the bridge pier, enabling connecting columns of the bridge pier to be inserted into annular connecting pieces of the bent cap, and arranging first reinforcing pieces and third reinforcing pieces in a staggered mode;
and S3, pouring ultra-high performance concrete between the annular connecting piece and the connecting column, and completing connection of the capping beam and the pier after the ultra-high performance concrete is solidified.
9. The method for connecting a capping beam and a pier according to claim 8, wherein the capping beam is prefabricated in the step S1, specifically:
and building a template of the capping beam, vertically fixing an annular connecting piece at a position connected with the bridge pier, enabling the annular connecting piece to penetrate through the capping beam, welding a first reinforcing piece on the inner wall of the annular connecting piece, welding a second reinforcing piece on the outer wall of the annular connecting piece, and pouring concrete outside the annular connecting piece and in a die of the capping beam to form the prefabricated capping beam.
10. The method for connecting a capping beam and a pier according to claim 9, wherein the pier is prefabricated in the step S1, specifically:
building a formwork of the bridge pier, vertically fixing a second steel pipe at the center of the upper part of the bridge pier, anchoring the second steel pipe in the bridge pier, wherein the length of the second steel pipe is greater than or equal to 2 times of the diameter of the second steel pipe, the length of the second steel pipe higher than the top of the bridge pier is equal to the height of the annular connecting piece, welding a third reinforcing piece on the outer wall of the second steel pipe, and pouring concrete in the die of the bridge pier and the second steel pipe to form the bridge pier with a connecting column at the top.
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