WO2021031373A1 - Structure de liaison de barre de renfort de pilier de pont préfabriqué et son procédé de construction - Google Patents

Structure de liaison de barre de renfort de pilier de pont préfabriqué et son procédé de construction Download PDF

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Publication number
WO2021031373A1
WO2021031373A1 PCT/CN2019/116075 CN2019116075W WO2021031373A1 WO 2021031373 A1 WO2021031373 A1 WO 2021031373A1 CN 2019116075 W CN2019116075 W CN 2019116075W WO 2021031373 A1 WO2021031373 A1 WO 2021031373A1
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WO
WIPO (PCT)
Prior art keywords
steel
grouting
grouting sleeve
bridge pier
joint
Prior art date
Application number
PCT/CN2019/116075
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English (en)
Chinese (zh)
Inventor
张建东
刘朵
侯福金
熊辉
周昆
李涛
杨耀辉
Original Assignee
苏交科集团股份有限公司
南京工业大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 苏交科集团股份有限公司, 南京工业大学 filed Critical 苏交科集团股份有限公司
Publication of WO2021031373A1 publication Critical patent/WO2021031373A1/fr

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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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • E04C5/165—Coaxial connection by means of sleeves

Definitions

  • the application relates to the connection structure and construction method of sleeve grouting in the assembly process of prefabricated bridge piers, and belongs to the field of bridge prefabrication engineering construction.
  • the sleeve grouting connection has High tensile strength, reliable connection and convenient construction, it is called the most widely used method of prefabricated bridge pier steel bar connection.
  • the sleeve grouting connection was mainly that the steel bar was inserted into the grouting sleeve from both ends.
  • Pour the expansive high-strength mortar to firmly combine the steel bar and the sleeve into one.
  • the expansibility of the poured expansive high-strength mortar has always been difficult to control, and the quality is difficult to guarantee, and the expansive mortar is easily pulled out and damaged. Therefore, it is particularly necessary to develop a new type of steel connection method.
  • this application is to overcome the difficulty of controlling the expansion of the expanded mortar in the grouting sleeve in the precast pier, the difficulty in quality assurance and the shortcomings of the previous sleeve grouting connection that the tensile capacity is not high, and to provide a precast bridge pier reinforcement connection method and
  • this application adopts mechanical connection, which has better accuracy and quality assurance, effectively improves the tensile capacity of the grouting sleeve, and is reliable and convenient in construction.
  • a prefabricated bridge pier steel bar connection structure including steel bars, grouting sleeves, steel chisel bars, grouting holes, grouting holes, limit baffles and rubber ring plugs;
  • Precast concrete components are arranged in the grouting sleeve, and steel bars are embedded in the precast concrete components;
  • the inner wall of the grouting sleeve is provided with a steel chisel strip along the circumference, the upper end of the grouting sleeve is provided with a grout hole, and the lower end of the grouting sleeve is provided with a grout hole;
  • the steel chisel bar includes a steel backing plate, joints, springs and steel pins; the bottom of the joint and the steel backing plate have reserved holes, and the steel pins penetrate the reserved holes of the joint and the steel backing plate.
  • One side is connected to the steel backing plate by a spring.
  • the angle between the joint and the steel backing plate is 50-70 degrees, and both are inclined to the middle of the sleeve; this makes the joint deformable and facilitates the insertion of steel bars; the joint is at the center of the grouting sleeve As a boundary, the two ends are more distributed in the middle, and the joint shape matches the concave groove of the steel bar;
  • the center position of the grouting sleeve is provided with a limit baffle to control the insertion depth of the steel bar; the steel chisel is bounded by the limit baffle and is symmetrically distributed in the grouting sleeve; both ends of the grouting sleeve are equipped with rubber ring plugs.
  • the distance between the grout hole and the grout hole from the proximal port is 15-30mm.
  • the length of the steel chisel is less than half the length of the grouting sleeve.
  • the rubber ring plug is in the shape of a truncated cone with a height of 18-25mm.
  • the construction method of the above-mentioned prefabricated bridge pier steel bar connection structure includes two parts, factory prefabrication and on-site installation;
  • Factory prefabrication first weld the steel chisel bar to the inner wall of the grouting sleeve. After the welding is completed, insert the steel bar from the pre-embedded end of the grouting sleeve. In this process, because the steel chisel bar is on one side of the joint The springs and joints are deformable, and the steel bars are easy to insert; and the two ends are plugged with tapered rubber rings to prevent the concrete from flowing into the grouting sleeve when the concrete is poured.
  • the grouting sleeve is pre-embedded at the end of the prefabricated bridge pier;
  • On-site installation refers to the connection between the bridge pier and the cover beam or the bridge pier and the cap; after the component is straightened and positioned, the other end of the steel bar is inserted into the grouting sleeve. Due to the uneven surface of the steel bar, the joint and the steel bar surface match, and the joint and the steel bar A mechanical connection can be formed to ensure that the steel bars are not easily pulled out, and the bearing capacity of the grouting sleeve is improved; after the installation is completed, ordinary mortar is poured from the grouting hole, and the grouting hole and the grouting hole are blocked after the grouting is completed.
  • connection structure of the grouting sleeve of the application is lapped by the joint of the steel chisel strip in the sleeve and the concave groove of the steel bar. It is very difficult to pull out the steel bar. In this way, ordinary mortar can be poured, which solves the problem of the previous connection structure of the grouting sleeve.
  • the expansion of the medium grouting material is difficult to control, the consolidation quality is difficult to guarantee, and the steel bar is easy to pull out, and the steel chisel bar acts as a shear key.
  • the steel bar must overcome the mechanical bite force between the steel bar and the steel chisel bar and the mortar. The friction force effectively improves the tensile strength of the grouting sleeve connection structure, and the construction is convenient and reliable.
  • Figure 1 is a schematic sectional view of a grouting sleeve of the application
  • Figure 2 is a schematic diagram of the connection structure between steel bars and steel chisel bars of the application
  • Figure 3 is a detailed view of the steel chisel bars of the application.
  • a prefabricated bridge pier steel bar connection structure includes a steel bar 1 and a grouting sleeve 2 embedded in a prefabricated concrete member.
  • a steel chisel 3 is provided along the circumference on the inner wall of the grouting sleeve.
  • One end of the sleeve 2 is provided with a grout hole 4, the other end is provided with a grout hole 5, a limit baffle 6 at the center of the grout sleeve, and a rubber ring plug 7 at the ports at both ends.
  • the steel chisel bar includes a steel backing plate 301, a joint 302, a spring 303 and a steel pin 304.
  • the bottom of the joint 302 and the steel backing plate have small reserved holes, and the steel pin 304 penetrates the joint and the steel
  • the backing plate has a reserved hole, and the other side of the joint 302 is connected to the steel backing plate 301 through a spring 303.
  • the angle between the joint 302 and the steel backing plate 301 is 50-70 degrees, and both are inclined toward the middle of the grouting sleeve 2. In this way, the joint 302 can be deformed to facilitate the insertion of the steel bar 1.
  • joint 302 is bounded by the center point of the grouting sleeve 2 with more ends and less distribution in the middle.
  • shape of the joint 302 matches the concave groove of the steel bar 1. Steel chisel bars can be machined.
  • the distance between the grout hole 4 and the grout hole 5 from the proximal port is 15-30mm.
  • the limit baffle 6 is to control the insertion depth of the steel bar.
  • the steel chisel bar 3 is symmetrically distributed in the grouting sleeve 2 with the limit baffle 6 as the boundary, and the length of the steel chisel bar 3 is less than half of the length of the grouting sleeve 2.
  • the rubber ring plug 7 has a frustum shape with a height of 18-25mm.
  • the two ends are plugged with cone-shaped rubber ring plugs 7 to prevent the concrete from flowing into the grouting sleeve 2 when the concrete is poured.
  • the grouting sleeve 2 is embedded in the end of the prefabricated bridge pier.
  • the other end of the steel bar 1 is straightened and positioned and inserted into the grouting sleeve 2, and the joint 302 is aligned and overlapped with the concave groove of the steel bar 1.
  • the prefabricated bridge pier steel bar connection structure includes steel bar 1, grouting sleeve 2, steel chisel 3, grouting hole 4, grouting hole 5, limit baffle 6 and rubber ring plug 7; grouting sleeve 2
  • prefabricated concrete members which are used to embed steel bars 1; the upper end of the grouting sleeve 2 is provided with a grouting hole 4, and the lower end of the grouting sleeve 2 is provided with a grouting hole 5; among them, the steel chisel 3 includes steel The backing plate 301, the joint 302, the spring 303 and the steel pin 304; one end of the joint 302 and the steel backing plate 301 have reserved holes, and the steel pin 304 penetrates through the preform of the joint 302 and the steel backing plate 301 Leave a hole.
  • the other end of the joint 302 is connected to the steel backing plate 301 by a spring 303.
  • the angle between the joint 302 and the steel backing plate 301 is 50° to 70°; along the axial direction of the grouting sleeve 2, the grouting sleeve 2 Including a middle tube section 22 and end tube sections 21 arranged on both sides of the middle tube section 22, both end tube sections 21 are provided with steel chisel bars 3; each steel chisel bar 3 has multiple joints 302, The free ends of the multiple joints 302 of each steel chisel 3 are inclined towards the middle tube section of the grouting sleeve 2; in the direction away from the middle tube section 22, the steel chisel 3 in each end tube section 21 is The gap between the two adjacent joints 302 gradually decreases; the shape of the joint 302 matches the concave groove of the steel bar 1.
  • the prefabricated bridge pier steel bar connection structure also includes a limit baffle 6, which is arranged in the middle tube section 22 In order to limit the insertion depth of the reinforcing steel 1 inserted by each end tube section 21.
  • the limiting baffle 6 is a strip plate, one end of the strip plate is connected to the inner wall of the middle tube section 22, and the other end of the strip plate extends toward the middle of the middle tube section 22.
  • limiting baffles 6 there are multiple limiting baffles 6, and multiple limiting baffles 6 are arranged at intervals along the circumferential direction of the middle cylinder section 22.
  • the limiting baffle 6 is annular or circular, and the outer peripheral surface of the limiting baffle 6 is connected with the inner wall of the middle cylinder section 22.
  • each end cylinder section 21 is provided with a plurality of steel chisel bars 3, and the plurality of steel chisel bars 3 in each end cylinder section 21 are arranged along the circumference of the end cylinder section 21.
  • rubber ring plugs 7 are provided in the ports at both ends of the grouting sleeve 2.
  • the distance between the hole center line of the grouting hole 4 and the upper end surface of the grouting sleeve 2 is m, and the radius of the grouting hole 4 is r; where, the value range of the difference between m and r It is 15mm to 30mm.
  • the distance between the center line of the grout hole 5 and the lower end surface of the grouting sleeve 2 is n, and the radius of the grout hole 5 is a; where the difference between n and a is The range is 15mm to 30mm.
  • the length of the steel chisel 3 is less than half of the length of the grouting sleeve 2.
  • the steel pipe is processed into the shape of the grouting sleeve 2 in the factory, and then drilled at 15-30mm at both ends of the port to form the grouting hole 4 and the grout hole 5, and then processed on the mold to form the limit baffle 6.
  • the processed steel chisel 3 including the steel backing plate 301, the joint 302, the spring 303 and the steel pin 304 are welded to the inner wall of the grouting sleeve 2 one by one.
  • the rubber ring plug 7 is plugged at both ends, and then In the prefabrication plant, insert the bundled steel bar 1 into the embedded end of the grouting sleeve 2, and connect the grouting hole 4 and the grouting hole 5 to the PVC pipe to facilitate the filling and discharge of the grout. Then the concrete is poured. After the curing is completed, Transport to the site for installation.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

L'invention concerne une structure de liaison de barre de renfort de pilier de pont préfabriqué et son procédé de construction, comprenant une barre de renfort incorporée dans un composant de béton préfabriqué, un manchon d'injection de coulis, des copeaux d'acier disposés le long de la circonférence sur la paroi interne du manchon d'injection de coulis, un trou d'injection de coulis disposé à une extrémité du manchon d'injection de coulis et un trou d'évacuation de coulis disposé à l'autre extrémité. Un déflecteur de limitation est prévu au niveau de la position centrale du manchon, et des bouchons de bague en caoutchouc sont disposés au niveau de l'une ou l'autre des ouvertures d'extrémité. Les copeaux d'acier sont soudés à la paroi interne du manchon. La barre de renfort est robuste sur la surface ; la forme des connecteurs de copeaux d'acier s'ajuste avec celle-ci de façon à former un pont mécanique. Lors de l'installation d'un pilier de pont préfabriqué, lorsque le composant préfabriqué est aligné et en position, la barre de renfort sur l'autre extrémité est insérée dans le manchon d'injection de coulis, du fait de la liaison mécanique entre les connecteurs de copeaux d'acier et la barre de renfort, la barre de renfort ne peut pas être retirée facilement et, à ce moment, un coulis commun peut être injecté à partir du trou d'injection de coulis pour achever le procédé. La barre de renfort selon la présente invention présente une force pour une mise en prise mécanique avec le manchon d'injection de coulis, ne peut pas être retirée facilement et fournit un certain degré de capacité de traction et de compression ; par conséquent, le procédé peut être achevé avec le coulis commun injecté dans le manchon, et la précision de construction et l'assurance qualité sont améliorées.
PCT/CN2019/116075 2019-08-22 2019-11-06 Structure de liaison de barre de renfort de pilier de pont préfabriqué et son procédé de construction WO2021031373A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910778323.6 2019-08-22
CN201910778323.6A CN110453607A (zh) 2019-08-22 2019-08-22 一种预制桥墩钢筋连接方式及其施工方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110453607A (zh) * 2019-08-22 2019-11-15 苏交科集团股份有限公司 一种预制桥墩钢筋连接方式及其施工方法
CN114319727A (zh) * 2022-02-08 2022-04-12 南通四建集团有限公司 一种自锁式钢筋连接灌浆套筒及其施工方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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CN111058571A (zh) * 2019-12-03 2020-04-24 中交第四公路工程局有限公司 一种带钢筋就位导槽的装配式灌浆套筒及制作方法
CN111270761A (zh) * 2020-02-07 2020-06-12 张荣法 一种快速安装的预制拼装式建筑框架
CN111827679B (zh) * 2020-07-20 2022-02-22 中建二局第一建筑工程有限公司 一种装配式混凝土墙体套筒灌浆施工高位排浆装置
CN113001749A (zh) * 2021-02-09 2021-06-22 浙江交工集团股份有限公司 立柱预制施工工艺
CN112962868B (zh) * 2021-03-04 2022-08-02 山东建筑大学 一种提高灌浆质量的灌浆套筒组件及方法
CN114876128A (zh) * 2022-04-06 2022-08-09 广州建筑产业研究院有限公司 一种具有高抗拔力的灌浆套筒及其制作方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100662099B1 (ko) * 2006-05-04 2006-12-27 삼양기전(주) 철근연결구
KR20100114361A (ko) * 2009-04-15 2010-10-25 기언관 철근연결구
CN109098358A (zh) * 2018-07-09 2018-12-28 东南大学 一种自锁式钢筋连接灌浆套筒
CN109235779A (zh) * 2018-10-22 2019-01-18 北京工业大学 一种可实现钢筋自定心的全灌浆套筒构造及作法
CN109457596A (zh) * 2018-10-22 2019-03-12 北京工业大学 一种预制拼装桥墩连接构造与施工方法
FR3072106A1 (fr) * 2017-10-11 2019-04-12 Universite De Nantes Dispositif de liaison de barres d'armature pour beton arme

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101831875A (zh) * 2010-06-09 2010-09-15 中交第一公路勘察设计研究院有限公司 预应力混凝土圆柱式空心桥墩预制拼装工艺
CN105421221B (zh) * 2015-11-03 2017-12-29 苏交科集团股份有限公司 预制节段拼装混凝土桥墩及其连接工艺
CN205313967U (zh) * 2015-11-30 2016-06-15 中铁二十四局集团安徽工程有限公司 一种预制桥墩与承台的连接构造
CN211547357U (zh) * 2019-08-22 2020-09-22 苏交科集团股份有限公司 预制拼装结构灌浆套筒连接构造
CN110453607A (zh) * 2019-08-22 2019-11-15 苏交科集团股份有限公司 一种预制桥墩钢筋连接方式及其施工方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100662099B1 (ko) * 2006-05-04 2006-12-27 삼양기전(주) 철근연결구
KR20100114361A (ko) * 2009-04-15 2010-10-25 기언관 철근연결구
FR3072106A1 (fr) * 2017-10-11 2019-04-12 Universite De Nantes Dispositif de liaison de barres d'armature pour beton arme
CN109098358A (zh) * 2018-07-09 2018-12-28 东南大学 一种自锁式钢筋连接灌浆套筒
CN109235779A (zh) * 2018-10-22 2019-01-18 北京工业大学 一种可实现钢筋自定心的全灌浆套筒构造及作法
CN109457596A (zh) * 2018-10-22 2019-03-12 北京工业大学 一种预制拼装桥墩连接构造与施工方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110453607A (zh) * 2019-08-22 2019-11-15 苏交科集团股份有限公司 一种预制桥墩钢筋连接方式及其施工方法
CN114319727A (zh) * 2022-02-08 2022-04-12 南通四建集团有限公司 一种自锁式钢筋连接灌浆套筒及其施工方法

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