CN-121675304-B - Connecting structure between prefabricated hollow pier columns of bridge and construction method

CN121675304BCN 121675304 BCN121675304 BCN 121675304BCN-121675304-B

Abstract

The invention provides a connecting structure and a construction method of bridge prefabricated hollow pier columns, wherein an inner sleeve is embedded at the lower end of an upper hollow pier column, an in-cylinder diaphragm is arranged in the inner sleeve, an inner sleeve is provided with a slurry inlet notch below the in-cylinder diaphragm, an outer sleeve is embedded at the upper end of a lower hollow pier column, an end diaphragm is arranged at the upper end of the lower hollow pier column, after the upper hollow pier column is in butt joint with the lower hollow pier column, the lower section of the inner sleeve is inserted into the upper section of the outer sleeve to form an annular first pouring cavity, a first shear key at the lower section of the inner sleeve and a third shear key at the upper section of the outer sleeve are both positioned in the first pouring cavity, main ribs in the upper hollow pier column and the lower hollow pier column are both extended into the first pouring cavity, the in-cylinder diaphragm is positioned above the end diaphragm and forms a third pouring cavity, and the slurry inlet notch is communicated with the first pouring cavity and the third pouring cavity. The invention can realize reliable connection between pier columns, and has equivalent cast-in-situ connection effect and certain toughness and shock resistance.

Inventors

Wu Suiwen
Chen Xiaolue
SHAO XUDONG
YANG YING
HE YAOBEI
LI SHUISHENG
ZHOU QUAN
CHEN GUANG

Assignees

湖南大学
中国建筑第五工程局有限公司
湖南省交通规划勘察设计院有限公司

Dates

Publication Date: 20260508
Application Date: 20260210

Claims (9)

1. The connecting structure between the prefabricated hollow pier columns of the bridge is characterized by comprising an upper hollow pier column (1), an inner sleeve (3), a lower hollow pier column (5) and an outer sleeve (6); The inner sleeve (3) is provided with a first shear key (3.2), the inner sleeve (3) is embedded at the lower end of the upper hollow pier column (1) through the first shear key (3.2) at the upper section of the inner sleeve, a cylinder inner diaphragm plate (3.5) is arranged in the inner sleeve (3), a plurality of slurry inlet notches (3.1) are formed in the side wall of the inner sleeve (3) below the cylinder inner diaphragm plate (3.5) at intervals along the circumferential direction, the outer sleeve (6) is provided with a third shear key (6.1), the outer sleeve (6) is embedded at the upper end of the lower hollow pier column (5) through the third shear key (6.1) at the lower section of the outer sleeve, and the upper end of the lower hollow pier column (5) is provided with an end diaphragm plate (5.2); After the upper hollow pier stud (1) is in butt joint with the lower hollow pier stud (5), the lower section of the inner sleeve (3) is inserted into the upper section of the outer sleeve (6) and forms an annular first pouring cavity (7) between the upper section of the inner sleeve and the lower section of the outer sleeve, a first shear key (3.2) of the lower section of the inner sleeve (3) and a third shear key (6.1) of the upper section of the outer sleeve (6) are both positioned in the first pouring cavity (7), an upper main rib (1.1) in the upper hollow pier stud (1) and a lower main rib (5.1) in the lower hollow pier stud (5) are both extended into the first pouring cavity (7), and an overlapping joint is formed between the upper main rib (1.1) and the lower main rib (5.1), a third pouring cavity (9) is formed between the upper end diaphragm (5.2) and the lower section of the inner diaphragm (3.5), and the slurry inlet notch (3.1) is communicated with the first pouring cavity (7); The upper hollow pier column (1) is provided with a grouting hole (2) and a grout outlet (10), the grouting hole (2) and the grout outlet (10) are obliquely arranged and symmetrically arranged according to the central line of the upper hollow pier column (1), an annular second pouring cavity (8) is reserved between the concrete wall body of the upper hollow pier column (1) and the outer side wall of the inner sleeve (3), the second pouring cavity (8) is located above the first pouring cavity (7) and communicated with each other, and the grouting hole (2) and the grout outlet (10) are communicated with the second pouring cavity (8).
2. The connection structure between prefabricated hollow bridge pier columns according to claim 1, characterized in that the outer side wall of the inner sleeve (3) is provided with a plurality of second shear keys (3.3) in the circumferential direction at positions corresponding to the second pouring cavities (8), and the second shear keys (3.3) extend into the second pouring cavities (8).
3. The connecting structure between the prefabricated hollow pier columns of the bridge according to claim 2, wherein a plurality of reinforcing ribs (4) are arranged at the lower end of the upper hollow pier column (1) at intervals along the circumferential direction, the upper ends of the reinforcing ribs (4) are buried in the concrete wall body of the upper hollow pier column (1), and the lower ends of the reinforcing ribs penetrate through the second pouring cavity (8) and then extend into the first pouring cavity (7).
4. The connecting structure between the prefabricated hollow pier columns of the bridge according to claim 3, wherein the upper section of the inner sleeve (3) is embedded into the inner side of the lower end of the concrete wall body of the upper hollow pier column (1) through a first shear key (3.2), the lower end of the concrete wall body of the upper hollow pier column (1) is provided with an annular semi-open notch (1.2) at one side close to the inner sleeve (3), and the semi-open notch (1.2) is matched with the outer side wall of the inner sleeve (3) to form a second pouring cavity (8).
5. The connecting structure between the prefabricated hollow pier columns of the bridge according to claim 4, wherein the lower section of the outer sleeve (6) is embedded outside the upper end of the concrete wall body of the lower hollow pier column (5) through a third shear key (6.1); The outer diameter and the inner cavity diameter of the upper hollow pier column (1) and the lower hollow pier column (5) are equal, the outer diameter of the lower hollow pier column (5) is equal to the outer diameter or the inner diameter of the outer sleeve (6), and the inner cavity diameter of the upper hollow pier column (1) is equal to the inner diameter or the outer diameter of the inner sleeve (3).
6. The connecting structure between bridge prefabricated hollow pier columns according to claim 1, wherein limiting bosses (5.3) are arranged on the end diaphragm plates (5.2), the lower ends of the inner sleeves (3) are sleeved on the limiting bosses (5.3), and a third pouring cavity (9) is formed between the limiting bosses (5.3) and the inner-cylinder diaphragm plates (3.5).
7. The connecting structure between bridge prefabricated hollow pier columns according to claim 1, wherein a plurality of stiffening rib plates (3.4) are alternately arranged on one surface of the inner sleeve (3) away from the lower hollow pier column (5) of the inner transverse partition plate (3.5) in the cylinder, and the stiffening rib plates (3.4) are respectively connected with the inner wall of the inner sleeve (3) and the inner transverse partition plate (3.5) in the cylinder.
8. The connecting structure between prefabricated hollow pier columns of bridge according to claim 1, characterized in that the distance between the lower surface of the cross slab (3.5) in the cylinder and the lower end of the inner sleeve (3) is less than or equal to half the height of the inner sleeve (3).
9. A method of constructing a connection structure between prefabricated hollow pier columns of a bridge as claimed in any one of claims 1 to 8, comprising: s1, prefabricating an upper hollow pier column (1) and a lower hollow pier column (5) in a factory, wherein an inner sleeve (3) is embedded at the lower end of the upper hollow pier column (1), and an outer sleeve (6) is embedded at the upper end of the lower hollow pier column (5); s2, after the installation of the lower hollow pier column (5) is completed on the construction site, hoisting the upper hollow pier column (1) above the lower hollow pier column (5) and completing the butt joint between the upper hollow pier column and the lower hollow pier column, wherein the lower end of the inner sleeve (3) is sleeved on a limit boss (5.3) on the lower hollow pier column (5), and the upper hollow pier column (1) and the lower hollow pier column (5) are coaxial; S3, pouring ultra-high-performance concrete from the grouting holes (2), and when the ultra-high-performance concrete overflows from the grout outlet holes (10), indicating that the first pouring cavity (7), the second pouring cavity (8) and the third pouring cavity (9) are filled with the ultra-high-performance concrete, and finishing grouting and sealing the grouting holes (2) and the grout outlet holes (10); and S4, after the ultra-high performance concrete is cured for T time, returning to the step S2 to mount the hollow pier column (1) on the next section, and pushing the hollow pier column until the construction of the whole pier column is completed.

Description

Connecting structure between prefabricated hollow pier columns of bridge and construction method Technical Field The invention relates to the technical field of bridge engineering, in particular to a connecting structure between prefabricated hollow pier columns of a bridge and a construction method. Background In the fields of bridges and constructional engineering, the prefabrication assembly technology is widely applied to connection nodes such as pier columns and capping beams, pier columns and bearing platforms or pile foundations and the like. The pier column and the bearing platform or the pile foundation are connected through mature technology, and various connection modes such as socket connection, grouting corrugated pipe connection, grouting sleeve connection and the like are formed. Because pile foundation and cushion cap are as the foundation component that pier stud and foundation are connected, its construction elevation is located above ground generally, can effectively avoid the construction degree of difficulty that high altitude construction brought. Meanwhile, due to the structural size advantages of the pile foundation and the bearing platform, the size of the connecting part can be designed to be larger than that of the upper structure, a sufficient connecting space is provided for mounting the pier stud, and the section abrupt change is structural design characteristics, so that the problem of the section abrupt change at the connecting node is not needed to be particularly considered. However, for pier stud members, construction methods of integral prefabrication, integral transportation and integral hoisting are still commonly used at present. The geometric dimensions of the prefabricated pier are severely limited by the transportation conditions and the carrying capacity of the hoisting equipment. More importantly, in terms of the technical difficulty of connecting prefabricated components, the technical gradient of 'pier column-pier column connection', 'pier column-capping beam connection', 'pier column-bearing platform or pile foundation connection' is presented. The existing pier column and capping beam, pier column and bearing platform or pile foundation connection technology cannot be directly transplanted and applied to connection among the pier columns, and the technical bottleneck severely restricts popularization and application of the prefabrication assembly technology in pier column construction. In view of the above, there is an urgent need for a connection structure and construction method between prefabricated hollow pier columns of a bridge to solve the problems in the prior art. Disclosure of Invention The invention aims to provide a connecting structure between prefabricated hollow pier columns of a bridge, and aims to solve the problem that the prefabrication and assembly technology of the pier columns is limited due to the lack of an effective connecting structure between the pier columns in the prior art, and the concrete technical scheme is as follows: the connecting structure comprises an upper hollow pier column, an inner sleeve, a lower hollow pier column and an outer sleeve; The inner sleeve is provided with a first shear key, the inner sleeve is embedded at the lower end of the upper hollow pier column through the first shear key at the upper section of the inner sleeve, a cylinder diaphragm is arranged in the inner sleeve, a plurality of slurry inlet notches are formed in the side wall of the inner sleeve below the cylinder diaphragm at intervals along the circumferential direction; After the upper hollow pier stud is in butt joint with the lower hollow pier stud, the lower section of the inner sleeve is inserted into the upper section of the outer sleeve, an annular first pouring cavity is formed between the upper section of the inner sleeve and the upper section of the outer sleeve, a first shear key of the lower section of the inner sleeve and a third shear key of the upper section of the outer sleeve are both positioned in the first pouring cavity, an upper main rib in the upper hollow pier stud and a lower main rib in the lower hollow pier stud are both extended into the first pouring cavity and are overlapped with each other between the upper main rib and the lower main rib, a diaphragm plate in the cylinder is positioned above the diaphragm plate at the end part, a third pouring cavity is formed between the diaphragm plate and the diaphragm plate, and the slurry inlet notch is communicated with the first pouring cavity and the third pouring cavity. Preferably, the upper hollow pier column is provided with a grouting hole and a grout outlet hole, the grouting hole and the grout outlet hole are obliquely arranged and are symmetrically arranged according to the central line of the upper hollow pier column, an annular second pouring cavity is reserved between the concrete wall body of the upper hollow pier column and the outer side wall of the inner sl