CN113668369B - Socket type connection structure of prefabricated segment reinforced concrete pier and manufacturing method - Google Patents

Socket type connection structure of prefabricated segment reinforced concrete pier and manufacturing method Download PDF

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CN113668369B
CN113668369B CN202111069474.8A CN202111069474A CN113668369B CN 113668369 B CN113668369 B CN 113668369B CN 202111069474 A CN202111069474 A CN 202111069474A CN 113668369 B CN113668369 B CN 113668369B
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prefabricated
pier body
prefabricated pier
section
body section
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CN113668369A (en
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成虎
邱开发
邹昀
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Jiangnan University
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Jiangnan University
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced

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  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention discloses a socket joint type connecting structure of a prefabricated section reinforced concrete pier and a manufacturing method, and belongs to the technical field of bridge engineering prefabrication and assembly. The prefabricated section reinforced concrete pier socket joint type connecting structure comprises a prefabricated bearing platform and prefabricated pier body sections, wherein the prefabricated pier body sections comprise a first prefabricated pier body section, a second prefabricated pier body section and a third prefabricated pier body section from top to bottom, the prefabricated pier body sections are connected in a socket joint mode, and gaps are filled with concrete; the bottom of prefabricated cushion cap is provided with the anchor reinforcing bar, and grout sleeve and longitudinal reinforcement have all been pre-buried to first prefabricated pier shaft segment section, the prefabricated pier shaft segment section of second and the prefabricated pier shaft segment section of third, longitudinal reinforcement fixes in grout sleeve, is equipped with the horse tooth between prefabricated pier shaft segment section of third and the prefabricated cushion cap and rubs with hands. The pier has the advantages of efficiency and structural integrity, no additional support is needed during site construction, the cost can be effectively reduced, and the integrity and the shock resistance of the pier are ensured.

Description

Socket type connection structure of prefabricated segment reinforced concrete pier and manufacturing method
Technical Field
The invention relates to a socket joint type connecting structure of a prefabricated section reinforced concrete pier and a manufacturing method, and belongs to the technical field of bridge engineering prefabrication and assembly.
Background
At present, the bridge construction is mainly made of cast-in-place concrete, and the cast-in-place concrete construction method has the advantages of multiple processes, long time consumption, large labor demand, serious environmental pollution of a construction site and large resource waste when the bridge is built. The method that the components are transported to the construction site for assembly after being prefabricated and maintained in a factory can make up for the defects of the traditional cast-in-place method and greatly improve the working efficiency.
Compared with the integral cast-in-situ pier, the integral and energy consumption capability of the pier assembled by the prefabricated segments is poor due to the problem of openings (joints) between the segments. Under the action of earthquake, the collision between the sections can not only bring local damage to the structure, but also can cause the shock aggravation of the upper structure of the bridge and even the risk of beam falling. In addition, grout muffjoint is as the connected mode that commonly uses between the pier segment, and the joint appears the bearing capacity when receiving to cut easily and is not enough, and the concrete performance is for destruction phenomena such as near seam reinforcing bar breaking, concrete crushing, and splice joint shearing slip. And the construction can't have efficiency and structural integrity concurrently in the prefabrication of current bridge.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a socket joint type connecting structure of a prefabricated section reinforced concrete pier and a manufacturing method thereof.
The invention provides a socket joint type connecting structure of a prefabricated section reinforced concrete pier, which comprises a prefabricated bearing platform and prefabricated pier body sections, wherein the prefabricated pier body sections comprise a first prefabricated pier body section, a second prefabricated pier body section and a third prefabricated pier body section from top to bottom; the first prefabricated pier body segment, the second prefabricated pier body segment and the third prefabricated pier body segment are also connected in a socket joint mode, and gaps are filled with concrete; the bottom of prefabricated cushion cap is provided with the anchor reinforcing bar, grout sleeve and longitudinal reinforcement have all been pre-buried to first prefabricated pier shaft segment section, the prefabricated pier shaft segment section of second and the prefabricated pier shaft segment section of third, longitudinal reinforcement is fixed in grout sleeve, it rubs with hands to be equipped with the horse tooth between prefabricated pier shaft segment section of third and the prefabricated cushion cap.
In one embodiment of the invention, the upper end of the first prefabricated pier body segment is provided with a horizontal pier body, and the bottom end of the first prefabricated pier body segment is provided with a groove; the upper ends of the second prefabricated pier body section and the third prefabricated pier body section are arranged to be convex, and the bottom ends of the second prefabricated pier body section and the third prefabricated pier body section are arranged to be concave.
In one embodiment of the invention, a cylindrical bulge is poured at the bottom of the prefabricated bearing platform, a hole for fixing a grouting sleeve is reserved in the bottom, and an anchoring steel bar extends out of the cylindrical bulge into the prefabricated bearing platform.
In an embodiment of the invention, the protruding ends of the second prefabricated pier body section and the third prefabricated pier body section are provided with holes for fixing grouting sleeves, and the groove ends of the first prefabricated pier body section, the second prefabricated pier body section and the third prefabricated pier body section are provided with grouting sleeves.
In one embodiment of the invention, the inner wall of the prefabricated bearing platform is provided with a groove and a protrusion, the outer wall of the third prefabricated pier body section is also provided with a groove and a protrusion, the groove of the inner wall of the prefabricated bearing platform and the groove of the outer wall of the third prefabricated pier body section are symmetrically distributed, the protrusion of the inner wall of the prefabricated bearing platform and the protrusion of the outer wall of the third prefabricated pier body section are symmetrically distributed, and after the prefabricated bearing platform and the third prefabricated pier body section are spliced, concrete grouting material is poured to form the annular shear key.
In one embodiment of the invention, the longitudinal steel bar and the grouting sleeve are connected through threads and then embedded in the prefabricated pier body section.
In one embodiment of the invention, the bottom end grooves of the first prefabricated pier body section, the second prefabricated pier body section and the third prefabricated pier body section have the same size; the sizes of the upper end bulges of the second prefabricated pier body section and the third prefabricated pier body section and the sizes of the prefabricated pile cap cylinder bulges are the same.
In one embodiment of the present invention, the diameters of the cross sections of the convex ends of the second prefabricated pier body section and the third prefabricated pier body section are smaller than the diameters of the cross sections of the concave ends of the first prefabricated pier body section, the second prefabricated pier body section and the third prefabricated pier body section by 10cm, and the centroids of the two cross sections are on the same plumb line.
In one embodiment of the invention, the longitudinal steel bars of the second prefabricated pier body segment and the third prefabricated pier body segment extend upwards for a certain distance; the bottom grooves of the first prefabricated pier body section, the second prefabricated pier body section and the third prefabricated pier body section are exposed out of the grouting sleeve by a section of length.
Another object of the present invention is to provide a method for manufacturing a socket joint type connection structure of a prefabricated segment reinforced concrete pier, in which the socket joint type connection structure of the prefabricated segment reinforced concrete pier is applied, comprising the steps of:
s1, completing prefabrication work of the first prefabricated pier body section, the second prefabricated pier body section, the third prefabricated pier body section and the prefabricated bearing platform in a prefabrication factory;
s2, before the first prefabricated pier body segment, the second prefabricated pier body segment and the third prefabricated pier body segment are poured, the longitudinal steel bars are connected with the grouting sleeves through threads, and after formwork erecting, concrete is poured and maintained; pouring the second prefabricated pier body segment and the third prefabricated pier body segment into a form that the upper end is a protrusion and the lower end is a groove, pouring the first prefabricated pier body segment into a form that the upper end is horizontal and the lower end is a groove, and meanwhile, extending the upper end of a steel bar for a certain length and exposing the lower end of a grouting sleeve for a certain length; the diameter of the cross section of the convex part of the prefabricated pier body segment is 10cm smaller than that of the cross section of the groove part, and the centroids of the two cross sections are on the same plumb line;
s3, pouring a cylindrical bulge at the bottom of the prefabricated bearing platform and reserving a hole for fixing a grouting sleeve; meanwhile, the anchoring steel bar is pre-embedded in the prefabricated bearing platform and extends out of the upper end of the cylindrical protrusion for a certain length, and then concrete is poured and maintained;
s4, after the prefabricated bearing platform and the prefabricated pier body segment are transported to the site, cleaning the socket joint part and wetting with water;
s5, paving concrete at the bottom of the socket of the prefabricated bearing platform, inserting the third prefabricated pier body section into the socket by hoisting, aligning the groove and the bulge among the prefabricated pier body sections in the hoisting process, aligning the grouting sleeve with the reserved hole, and simultaneously inserting the extending section of the upper end of the anchoring steel bar into the grouting sleeve of the third prefabricated pier body section;
s6, connecting a grouting sleeve pre-embedded in the third prefabricated pier body section with an anchoring steel bar pre-embedded in the prefabricated bearing platform through grouting material, and filling joints between the groove of the third prefabricated pier body section and the protrusion of the prefabricated bearing platform through pouring concrete;
s7, adopting concrete cast-in-place serrated racking and adopting a self-leveling mode to pour so as to ensure strength and compactness;
s8, paving ultrahigh-performance concrete in a socket of a third prefabricated pier body segment, inserting the second prefabricated pier body segment into the socket by hoisting, aligning a groove of the second prefabricated pier body segment with a bulge of the third prefabricated pier body segment in the hoisting process, aligning a grouting sleeve with the reserved hole, and simultaneously inserting a longitudinal steel bar extending out of the upper end of the third prefabricated pier body segment into the grouting sleeve pre-embedded in the second prefabricated pier body segment;
s9, repeating the operation of S6 to realize the assembly between the second prefabricated pier body section and the third prefabricated pier body section;
and S10, repeating the operations S8 and S9, and realizing the assembly between the first prefabricated pier body section and the second prefabricated pier body section.
Advantageous effects
(1) Due to the fact that the grouting sleeve is high in connection construction precision requirement and high in operation difficulty of accurate positioning in an assembly site, the grouting sleeve pre-embedded in the prefabricated section and the reserved hole can ensure accurate positioning between the upper section and the lower section, installation is easy, and construction difficulty is reduced.
(2) The grooves and the protrusions arranged between the upper prefabricated section and the lower prefabricated section have large sizes, can well resist external force disturbance in the construction process, do not need to be additionally provided with supports in site construction, and can effectively reduce the cost.
(3) The double-channel defense line and cast-in-place serrated racking mode adopted in the segmental connection effectively ensure the integrity and the shock resistance of the pier.
(4) The invention has the characteristics of standardization, industrialization and scale, the storage and transportation difficulty of the segments is low, the requirement on hoisting equipment is not high, and the advantages are obvious.
Drawings
FIG. 1 is an overall schematic view of a socket joint type connection structure of a prefabricated segment reinforced concrete pier of the present invention;
FIG. 2 is a sectional view taken along line A-A in FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
fig. 4 is a schematic view of a first prefabricated pier body segment according to the present invention;
fig. 5 is a schematic view of a second prefabricated pier body segment according to the present invention;
fig. 6 is a schematic view of a third prefabricated pier body segment according to the present invention;
FIG. 7 is a schematic front view of a prefabricated platform according to the present invention;
FIG. 8 is a schematic top view of a prefabricated platform according to the present invention;
fig. 9 is an assembly flow chart of the socket joint type connection structure of the precast segment reinforced concrete pier.
Wherein: 1. a first prefabricated pier shaft segment; 2. a second prefabricated pier shaft segment; 3. a third prefabricated pier body segment; 4. prefabricating a bearing platform; 5. longitudinal reinforcing steel bars; 6. grouting a sleeve; 7. racking; 8. and anchoring the steel bars.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The terms "inner" and "outer" are used to refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1
A socket joint type connecting structure of a prefabricated section reinforced concrete pier comprises a prefabricated bearing platform 4 and prefabricated pier body sections, wherein the prefabricated pier body sections comprise a first prefabricated pier body section 1, a second prefabricated pier body section 2 and a third prefabricated pier body section 3 from top to bottom, the prefabricated bearing platform 4 and the third prefabricated pier body section 3 are connected in a socket joint mode, and gaps are filled with ultrahigh-performance concrete; and the first prefabricated pier body segment 1, the second prefabricated pier body segment 2 and the third prefabricated pier body segment 3 are also connected in a socket joint mode, and gaps are filled with ultra-high-performance concrete. The bottom of prefabricated cushion cap 4 is provided with anchor reinforcing bar 8, grout sleeve 6 and longitudinal reinforcement 5 have all been pre-buried to first prefabricated pier shaft section 1, second prefabricated pier shaft section 2 and third prefabricated pier shaft section 3, reinforcing bar 5 is fixed in grout sleeve 6.
As shown in fig. 4-8, the upper end of the first prefabricated pier body segment 1 is provided with a horizontal pier body, and the bottom end is provided with a groove; the upper ends of the second prefabricated pier body section 2 and the third prefabricated pier body section 3 are provided with bulges, and the bottom ends of the second prefabricated pier body section and the third prefabricated pier body section are provided with grooves; socket space and position are reserved in the prefabricated bearing platform 4 before pouring, a cylindrical protrusion is poured at the bottom of the prefabricated bearing platform 4, a hole for fixing the grouting sleeve 6 is reserved in the bottom, and an anchoring steel bar 8 extends out of the cylindrical protrusion to the prefabricated bearing platform 4. Prefabricated cushion cap 4's inboard has prefabricated raft 7 to pour the space along direction of height reservation, and cast-in-place raft 7 can play the effect of shear force key to effective transmission shear force strengthens the connectivity between prefabricated cushion cap 4 and the prefabricated pier shaft festival section of third 3.
Further, the protruding end of prefabricated pier shaft section 2 of second and the prefabricated pier shaft section 3 of third is equipped with the hole that is used for fixed grout sleeve 6, the recess end of prefabricated pier shaft section 1 of first, the prefabricated pier shaft section 2 of second and the prefabricated pier shaft section 3 of third is equipped with grout sleeve 6.
When the prefabricated pier body sections 2 and 3 are assembled on site, the longitudinal steel bars 5 in the third prefabricated pier body section 3 extend into the grouting sleeves 6 in the second prefabricated pier body section 2, and meanwhile, the grouting sleeves 6 in the second prefabricated pier body section 2 extend into holes reserved in the sections 3 and used for fixing the grouting sleeves 6, so that a double-channel defense line with strong joints is formed. Because the groove end and the convex end are arranged between the second prefabricated pier body section 2 and the third prefabricated pier body section 3, no additional support is needed in the field assembly process; simultaneously, pre-buried grout sleeve 6 and the hole of reserving can ensure the accurate location between the upper and lower section to the construction degree of difficulty has been reduced.
Further, be provided with serrated racking 7 between prefabricated cushion cap 4 and the prefabricated pier shaft festival section of third 3, the inner wall of prefabricated cushion cap 4 is provided with recess and arch, the outer wall of prefabricated pier shaft festival section of third 3 also is provided with recess and arch, and the recess of prefabricated cushion cap 4 inner wall is the symmetric distribution with the recess of the prefabricated pier shaft festival section of third 3 outer walls, and the arch of prefabricated cushion cap 4 inner wall is the symmetric distribution with the arch of the prefabricated pier shaft festival section of third 3 outer walls, waits to pour ultra high performance concrete grout material after the concatenation of prefabricated cushion cap 4 and the prefabricated pier shaft festival section of third 3 is accomplished, forms ring form shear force key.
Furthermore, the longitudinal steel bars 5 and the grouting sleeves 6 are connected through threads and then embedded in the prefabricated pier body sections, and the longitudinal steel bars 5 face upwards and the grouting sleeves 6 face downwards.
Further, the bottom end grooves of the first prefabricated pier body section 1, the second prefabricated pier body section 2 and the third prefabricated pier body section 3 are identical in size; the sizes of the upper end bulges of the second prefabricated pier body section 2 and the third prefabricated pier body section 3 and the sizes of the cylinder bulges of the prefabricated bearing platform 4 are the same.
Further, the diameter of the cross section of the protruding end of the second prefabricated pier body section 2 and the third prefabricated pier body section 3 is 10cm smaller than that of the cross section of the groove end of the first prefabricated pier body section 1, the second prefabricated pier body section 2 and the third prefabricated pier body section 3, and the centroids of the two cross sections are on the same plumb line.
Further, longitudinal steel bars 5 of the second prefabricated pier body section 2 and the third prefabricated pier body section 3 extend upwards for a certain distance; the bottom end grooves of the first prefabricated pier body section 1, the second prefabricated pier body section 2 and the third prefabricated pier body section 3 are exposed out of the grouting sleeve 6 with a section of length.
Example 2
As shown in fig. 9, the present embodiment provides a method for manufacturing a socket joint type connection structure of a prefabricated segment reinforced concrete pier, where the method applies the socket joint type connection structure of the prefabricated segment reinforced concrete pier provided in embodiment 1, and specifically includes the following steps:
s1, completing prefabrication work of the first prefabricated pier body section 1, the second prefabricated pier body section 2, the third prefabricated pier body section 3 and the prefabricated pile cap 4 in a prefabrication factory;
s2, before pouring the first prefabricated pier body section 1, the second prefabricated pier body section 2 and the third prefabricated pier body section 3, connecting the longitudinal steel bar 5 and the grouting sleeve 6 through threads, and pouring and maintaining concrete after formwork erecting; pouring the second prefabricated pier body section 2 and the third prefabricated pier body section 3 into a form that the upper ends are bulges and the lower ends are grooves, pouring the first prefabricated pier body section 1 into a form that the upper ends are horizontal and the lower ends are grooves, and meanwhile, extending the upper ends of the reinforcing steel bars 5 for a certain length and exposing the lower ends of the grouting sleeves 6 for a certain length; the diameter of the cross section of the convex part of the prefabricated pier body segment is 10cm smaller than that of the cross section of the groove part, and the centroids of the two cross sections are on the same plumb line;
s3, pouring a cylindrical bulge at the bottom of the prefabricated bearing platform 4 and reserving a hole for fixing the grouting sleeve 6; meanwhile, the anchoring steel bar 8 is pre-embedded in the prefabricated bearing platform 4 and extends out of the upper end for a certain length, and then concrete is poured and maintained;
s4, after the prefabricated bearing platform 4 and the prefabricated pier body segment are transported to the site, cleaning the socket joint part and wetting with water;
s5, firstly paving ultrahigh-performance concrete at the bottom of the bell socket of the prefabricated bearing platform 4, inserting the third prefabricated pier body section 3 into the bell socket by hoisting, aligning the groove and the bulge between the upper prefabricated pier body section and the lower prefabricated pier body section in the hoisting process, aligning the grouting sleeve 6 with the reserved hole, and simultaneously inserting the extending section at the upper end of the anchoring steel bar 8 into the grouting sleeve 6 of the third prefabricated pier body section 3;
s6, connecting the grouting sleeve 6 pre-embedded in the third prefabricated pier body section 3 with the anchoring steel bar 8 pre-embedded in the prefabricated bearing platform 4 through grouting material, and filling joints between the groove of the third prefabricated pier body section 3 and the protrusion of the prefabricated bearing platform 4 through pouring ultrahigh-performance concrete;
s7, pouring an ultra-high performance concrete cast-in-place serrated raft 7 in a self-leveling mode to ensure strength and compactness;
s8, paving ultrahigh-performance concrete in a bell socket of the third prefabricated pier body section 3, inserting the second prefabricated pier body section 2 into the bell socket by hoisting, aligning a groove of the second prefabricated pier body section 2 with a protrusion of the third prefabricated pier body section 3 in the hoisting process, aligning a grouting sleeve 6 with a reserved hole, and simultaneously inserting a longitudinal steel bar 5 extending out of the upper end of the third prefabricated pier body section 3 into the grouting sleeve 6 pre-buried in the second prefabricated pier body section 2;
s9, repeating the operation of S6 to realize the assembly between the second prefabricated pier body section 2 and the third prefabricated pier body section 3;
and S10, repeating the operations S8 and S9, and realizing the assembly between the first prefabricated pier body section 1 and the second prefabricated pier body section 2.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents may be substituted for elements thereof without departing from the scope of the invention.

Claims (6)

1. The prefabricated section reinforced concrete pier socket joint type connecting structure is characterized by comprising a prefabricated bearing platform and prefabricated pier body sections, wherein the prefabricated pier body sections comprise a first prefabricated pier body section, a second prefabricated pier body section and a third prefabricated pier body section from top to bottom, the prefabricated bearing platform and the third prefabricated pier body section are connected in a socket joint mode, and gaps are filled with concrete; the first prefabricated pier body segment, the second prefabricated pier body segment and the third prefabricated pier body segment are also connected in a socket joint mode, and gaps are filled with concrete; anchoring reinforcing steel bars are arranged at the bottom of the prefabricated bearing platform, grouting sleeves and longitudinal reinforcing steel bars are pre-embedded in the first prefabricated pier body section, the second prefabricated pier body section and the third prefabricated pier body section, the longitudinal reinforcing steel bars are fixed in the grouting sleeves, and a serrated raft is arranged between the third prefabricated pier body section and the prefabricated bearing platform;
the upper end of the first prefabricated pier body segment is provided with a horizontal pier body, and the bottom end of the first prefabricated pier body segment is provided with a groove; the upper ends of the second prefabricated pier body section and the third prefabricated pier body section are provided with bulges, and the bottom ends of the second prefabricated pier body section and the third prefabricated pier body section are provided with grooves;
a cylindrical bulge is poured at the bottom of the prefabricated bearing platform, a hole for fixing a grouting sleeve is reserved in the bottom of the prefabricated bearing platform, and an anchoring steel bar extends out of the cylindrical bulge into the prefabricated bearing platform;
the protruding ends of the second prefabricated pier body section and the third prefabricated pier body section are provided with holes for fixing grouting sleeves, and the groove ends of the first prefabricated pier body section, the second prefabricated pier body section and the third prefabricated pier body section are provided with grouting sleeves;
the inner wall of prefabricated cushion cap is provided with the recess and protruding, the outer wall of prefabricated pier shaft festival section of third also is provided with recess and arch, and the recess of prefabricated cushion cap inner wall is the symmetric distribution with the recess of prefabricated pier shaft festival section outer wall of third, and the arch of prefabricated cushion cap inner wall is the symmetric distribution with the arch of prefabricated pier shaft festival section outer wall of third, treats that prefabricated cushion cap and the concatenation of prefabricated pier shaft festival section of third accomplish the back concreting and grouts, forms ring form shear force key.
2. The socket joint type connection structure of the precast segment reinforced concrete pier of claim 1, wherein the longitudinal steel bar and the grouting sleeve are embedded in the precast pier body segment after being connected by screw threads.
3. The socket joint type connection structure of the prefabricated segment reinforced concrete pier of claim 2, wherein the bottom end grooves of the first prefabricated pier body segment, the second prefabricated pier body segment and the third prefabricated pier body segment are the same in size; the sizes of the upper end bulges of the second prefabricated pier body section and the third prefabricated pier body section and the sizes of the prefabricated pile cap cylinder bulges are the same.
4. The socket joint construction of the precast segment reinforced concrete pier of claim 3, wherein the diameter of the cross section of the convex end of the second precast pier body segment and the third precast pier body segment is 10cm smaller than the diameter of the cross section of the concave end of the first precast pier body segment, the second precast pier body segment and the third precast pier body segment, and the centroids of the two cross sections are on the same plumb line.
5. The socket joint type connection structure of the prefabricated segment reinforced concrete pier of claim 4, wherein longitudinal steel bars of the second prefabricated pier body segment and the third prefabricated pier body segment extend upwards for a distance; the bottom grooves of the first prefabricated pier body section, the second prefabricated pier body section and the third prefabricated pier body section are exposed out of the grouting sleeve by a section of length.
6. A manufacturing method of a socket joint type connecting structure of a prefabricated segment reinforced concrete pier is characterized in that the socket joint type connecting structure of the prefabricated segment reinforced concrete pier is applied according to any one of claims 1 to 5, and comprises the following steps:
s1, completing prefabrication work of the first prefabricated pier body section, the second prefabricated pier body section, the third prefabricated pier body section and the prefabricated bearing platform in a prefabrication factory;
s2, before the first prefabricated pier body segment, the second prefabricated pier body segment and the third prefabricated pier body segment are poured, the longitudinal steel bars are connected with the grouting sleeves through threads, and after formwork erecting, concrete is poured and maintained; pouring the second prefabricated pier body segment and the third prefabricated pier body segment into a form that the upper end is a protrusion and the lower end is a groove, pouring the first prefabricated pier body segment into a form that the upper end is horizontal and the lower end is a groove, and meanwhile, extending the upper end of a steel bar for a certain length and exposing the lower end of a grouting sleeve for a certain length; the diameter of the cross section of the convex part of the prefabricated pier body segment is 10cm smaller than that of the cross section of the groove part, and the centroids of the two cross sections are on the same plumb line;
s3, pouring a cylindrical bulge at the bottom of the prefabricated bearing platform and reserving a hole for fixing a grouting sleeve; meanwhile, the anchoring steel bar is pre-embedded in the prefabricated bearing platform and extends out of the upper end of the cylindrical protrusion for a certain length, and then concrete is poured and maintained;
s4, after the prefabricated bearing platform and the prefabricated pier body segment are transported to the site, cleaning the socket joint part and wetting with water;
s5, paving concrete at the bottom of the socket of the prefabricated bearing platform, inserting the third prefabricated pier body section into the socket by hoisting, aligning the groove and the bulge among the prefabricated pier body sections in the hoisting process, aligning the grouting sleeve with the reserved hole, and simultaneously inserting the extending section of the upper end of the anchoring steel bar into the grouting sleeve of the third prefabricated pier body section;
s6, connecting a grouting sleeve pre-embedded in the third prefabricated pier body section with an anchoring steel bar pre-embedded in the prefabricated bearing platform through grouting material, and filling joints between the groove of the third prefabricated pier body section and the protrusion of the prefabricated bearing platform through pouring concrete;
s7, adopting concrete cast-in-place serrated racking and adopting a self-leveling mode to pour so as to ensure strength and compactness;
s8, paving ultrahigh-performance concrete in a socket of a third prefabricated pier body segment, inserting the second prefabricated pier body segment into the socket by hoisting, aligning a groove of the second prefabricated pier body segment with a bulge of the third prefabricated pier body segment in the hoisting process, aligning a grouting sleeve with the reserved hole, and simultaneously inserting a longitudinal steel bar extending out of the upper end of the third prefabricated pier body segment into the grouting sleeve pre-embedded in the second prefabricated pier body segment;
s9, repeating the operation of S6 to realize the assembly between the second prefabricated pier body section and the third prefabricated pier body section;
and S10, repeating the operations S8 and S9, and realizing the assembly between the first prefabricated pier body section and the second prefabricated pier body section.
CN202111069474.8A 2021-09-13 2021-09-13 Socket type connection structure of prefabricated segment reinforced concrete pier and manufacturing method Active CN113668369B (en)

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