CN217580122U

CN217580122U - Connecting node of pile top and foundation after pile cutting of prestressed pipe pile

Info

Publication number: CN217580122U
Application number: CN202221432137.0U
Authority: CN
Inventors: 徐磊
Original assignee: CITIC General Institute of Architectural Design and Research Co Ltd
Current assignee: CITIC General Institute of Architectural Design and Research Co Ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2022-10-14
Anticipated expiration: 2032-06-09

Abstract

The utility model relates to a connecting node of a pile top and a foundation after the pile cutting of a prestressed pipe pile, which comprises the prestressed pipe pile and a reinforced concrete foundation after the pile cutting; the prestressed pipe pile after pile cutting is internally provided with a core filling reinforcement cage, longitudinal steel bars of the core filling reinforcement cage extend out of the pile top of the prestressed pipe pile after pile cutting, the pile top of the prestressed pipe pile after pile cutting and longitudinal steel bars of the core filling reinforcement cage extend into the reinforced concrete foundation, fixed stirrups are welded and connected to the longitudinal steel bars of the core filling reinforcement cage, a circular anchor plate is arranged in the reinforced concrete foundation, the circular anchor plate is attached to the top surface of the upper part of the reinforced concrete foundation, and the longitudinal steel bars of the core filling reinforcement cage are connected with the circular anchor plate through hole plug welding. The utility model discloses can solve the problem that connecting reinforcement anchor length can't satisfy the atlas requirement when basic thickness is less, it is reliable to have the atress connection, advantage such as construction is convenient.

Description

Connecting node of pile top and foundation after pile cutting of prestressed pipe pile

Technical Field

The utility model relates to a building structure field, concretely relates to connection structure of pile bolck and basis behind the stake is cut to prestressing force tubular pile.

Background

When the prestressed pipe pile is sunk, the pile head higher than the designed elevation cannot be pressed to the designed elevation due to factors such as geology, construction and the like, the pile head is required to be cut off, when the pile top is connected with a foundation through the core filling longitudinal steel bar after pile cutting, enough straight anchor sections of the anchoring steel bar need to be ensured, but when the foundation is small in thickness (such as the foundation thickness of 250mm to 400mm), the length of the straight anchor sections of the core filling longitudinal steel bar cannot meet the requirements of a map set. The prestressed pipe pile bearing the tensile force at this time may have pull-out damage of the longitudinal reinforcing steel bars of the core filling before the pile body is damaged. Such damage is more damaging and violates the basic structural design rules that nodes should not damage prior to the component.

Disclosure of Invention

An object of the utility model is to provide a connection problem of above-mentioned prestressed pipe pile and basis is solved with the connected node on basis to pile bolck behind prestressed pipe pile cut.

The utility model adopts the following scheme: a connecting node of a pile top and a foundation after a prestressed pipe pile is cut comprises the prestressed pipe pile after the pile is cut and a reinforced concrete foundation; the prestressed pipe pile after pile cutting is internally provided with a core filling reinforcement cage, longitudinal steel bars of the core filling reinforcement cage extend out of the pile top of the prestressed pipe pile after pile cutting, the pile top of the prestressed pipe pile after pile cutting and longitudinal steel bars of the core filling reinforcement cage extend into the reinforced concrete foundation, fixed stirrups are welded and connected to the longitudinal steel bars of the core filling reinforcement cage, a circular anchor plate is arranged in the reinforced concrete foundation, the circular anchor plate is attached to the top surface of the upper part of the reinforced concrete foundation, and the longitudinal steel bars of the core filling reinforcement cage are connected with the circular anchor plate through hole plug welding.

The fixed stirrup is located 100mm below the circular anchor plate.

The utility model discloses require cyclic annular steel sheet thickness not to be less than 16mm, the material is Q235B.

The utility model discloses require that core steel reinforcement framework's longitudinal reinforcement diameter is not more than 25mm.

And welding holes for perforation plug welding are formed in the circular anchor plate according to the longitudinal steel bar position of the core-filling steel bar framework. The utility model discloses the welded hole that requires perforation plug welding needs to accomplish according to the diameter of the longitudinal reinforcement of the steel reinforcement skeleton of filling in the core and arranging the processing in advance, and need regard circular anchor slab as interim locating template when filling in the core steel reinforcement skeleton ligature to guarantee the connection of later stage longitudinal reinforcement and circular anchor slab.

The utility model discloses a set up the circular anchor slab that has certain rigidity at the longitudinal reinforcement end of filling core steel reinforcement skeleton, improve the anchor ability of reinforcing bar through the pressure of circular anchor slab to basic concrete, require circular anchor slab and the laminating of basic upper portion reinforcing bar top surface during the construction to the slip that produces after restriction circular anchor slab and the longitudinal reinforcement atress of filling core reduces the fracture and the deformation of node, has the atress and connects reliably, advantage such as construction is convenient.

Drawings

Fig. 1 is a front view of the connection of the present invention.

Fig. 2 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.

Fig. 3 is a sectional view taken along line B-B of fig. 1.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The drawings are only for purposes of illustration and are not intended to be limiting, the drawings are only schematic and are not intended to be limiting; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Referring to fig. 1-3, the utility model comprises: the pile comprises a prestressed pipe pile 1 after pile cutting and a reinforced concrete foundation 7; be equipped with core filling steel reinforcement framework 2 in the prestressed pipe pile 1 after the pile cuts, the longitudinal reinforcement of core filling steel reinforcement framework 2 stretches out the 1 pile top of prestressed pipe pile after the pile cuts, 1 pile top of prestressed pipe pile after the pile cuts and the longitudinal reinforcement of core filling steel reinforcement framework 2 stretch into reinforced concrete foundation 7 in, 1 pile top of prestressed pipe pile after the pile cuts is located reinforced concrete foundation 7's lower part reinforcing bar 4 below, welded connection has fixed stirrup 6 on the longitudinal reinforcement of core filling steel reinforcement framework 2, circular anchor slab 3 sets up in reinforced concrete foundation 7 and laminates at the 5 top surfaces of reinforced concrete foundation 7 upper portion reinforcing bar, the welding hole of perforation plug welding is seted up according to core filling steel reinforcement framework 2's longitudinal reinforcement position on the circular anchor slab 3, and the longitudinal reinforcement of core filling steel reinforcement framework 2 is connected with the 3 perforation plug welding of circular anchor slab.

The fixed stirrup is located 100mm below the circular anchor plate.

The utility model discloses require cyclic annular steel sheet thickness not to be less than 16mm, its edge is more than the longitudinal reinforcement of filling core steel reinforcement framework apart from the biggest distance at prestressed pipe pile center 50mm apart from prestressed pipe pile center apart from the distance at prestressed pipe pile center, and the material is Q235B.

The utility model discloses an implement the step as follows: the first step is as follows: forming welding holes for perforation plug welding according to the longitudinal steel bar positions of the core-filling steel bar framework on the circular anchor plate; the second step: temporarily fixing longitudinal steel bars of the core-filling steel bar framework and the round anchor plate; the third step: binding and fixing stirrups at a position 100mm below the circular anchor plate and welding the stirrups with longitudinal steel bars of the core-filling steel bar framework; the fourth step: binding a core-filling steel reinforcement framework; the fifth step: taking out the round anchor plate, positioning the core filling steel reinforcement framework in place, and completing the pile top core filling of the precast pile according to the specifications; and a sixth step: binding the foundation steel bars; the seventh step: placing a circular anchor plate on the top surface steel bar of the foundation and performing perforation plug welding connection with the longitudinal steel bar of the core-filled steel bar framework; eighth step: and pouring foundation concrete to complete connection.

The examples are merely illustrative for clearly illustrating the salient features of the present invention and are not intended to limit the embodiments of the present invention. It will be apparent to those skilled in the art that various other modifications and variations can be made in the above teachings without departing from the scope of the invention.

Claims

1. The utility model provides a prestressed pipe pile cuts connected node of pile bolck and basis after stake, characterized by: the pile comprises a prestressed pipe pile and a reinforced concrete foundation after pile cutting; the prestressed pipe pile after pile cutting is internally provided with a core filling reinforcement cage, longitudinal steel bars of the core filling reinforcement cage extend out of the pile top of the prestressed pipe pile after pile cutting, the pile top of the prestressed pipe pile after pile cutting and longitudinal steel bars of the core filling reinforcement cage extend into the reinforced concrete foundation, fixed stirrups are welded and connected to the longitudinal steel bars of the core filling reinforcement cage, a circular anchor plate is arranged in the reinforced concrete foundation, the circular anchor plate is attached to the top surface of the upper part of the reinforced concrete foundation, and the longitudinal steel bars of the core filling reinforcement cage are connected with the circular anchor plate through hole plug welding.

2. The connecting node of pile top and foundation after pile cutting of prestressed pipe pile according to claim 1, characterized in that: the fixed stirrup is located 100mm below the circular anchor plate.

3. The joint of the pile top and the foundation after the pile cutting of the prestressed pipe pile according to claim 1 or 2, characterized in that: the thickness of the round anchor plate is not less than 16mm, and the round anchor plate is made of Q235B.

4. The joint of the pile top and the foundation after the pile cutting of the prestressed pipe pile according to claim 1 or 2, characterized in that: the diameter of the longitudinal steel bar of the core-filling steel bar framework is not more than 25mm.

5. The connecting node of the pile top and the foundation after the pile cutting of the prestressed pipe pile according to claim 1 or 2, characterized in that: and welding holes for perforation plug welding are formed in the circular anchor plate according to the longitudinal steel bar position of the core-filling steel bar framework.