CN-224227772-U - Precast pile

CN224227772UCN 224227772 UCN224227772 UCN 224227772UCN-224227772-U

Abstract

The utility model provides a precast pile, which belongs to the technical field of building materials and comprises a cage rib framework and a concrete pile body, wherein the cage rib framework consists of a main rib array formed by circumferentially arranging and distributing a plurality of main ribs and stirrups arranged around the main rib array, concrete is poured on the cage rib framework, the axial deflection of the main ribs is controlled to be within a certain range, the prestress loss is reduced, and the prestress technology counteracts the tensile stress possibly caused by external load by applying pressure to the concrete in advance, so that the service life and the bearing capacity of the structure are prolonged.

Inventors

HU GUANGYANG
HUANG XIAOFENG
LIU FU

Assignees

宁波中淳高科股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250409

Claims (10)

1. A precast pile, characterized by comprising: The cage rib framework consists of a main rib array formed by circumferentially arranging and distributing a plurality of main ribs and stirrups arranged around the main rib array; The concrete pile body is poured on the cage rib framework; On the projection of the length direction of the concrete pile body, one end of the main rib is deflected by an angle alpha along the circumferential direction of the concrete pile body relative to the other end of the main rib.
2. A precast pile according to claim 1, wherein a central angle between two adjacent main ribs is θ, and the deflection angle α is smaller than the central angle θ.
3. A precast pile according to claim 2, wherein the deflection angle α is 0.5 ° or more, and the circumferential deflection direction of each of the main ribs is the same.
4. A precast pile according to claim 3, wherein the deflection angle α is 1/2 or less of the central angle θ, and the circumferential deflection angles of the main ribs are the same.
5. A precast pile according to claim 4, wherein the deflection angle α is in the range of 0 to 3 °, and the main ribs are uniformly deflected circumferentially in the longitudinal direction of the concrete pile body.
6. A precast pile according to claim 1, further comprising end plates, wherein two of the end plates are respectively disposed at both ends of the concrete pile body, the end plates are provided with end holes, and the ends of the main ribs are mounted in the end holes.
7. A precast pile according to claim 6, wherein the end hole comprises an anchor hole, a tendon passing hole and a tendon passing groove, and the anchor hole and the tendon passing hole are connected through the tendon passing groove.
8. A precast pile according to claim 1, wherein the concrete pile body is provided with a thick pile section and a thin pile section, the thick pile section and the thin pile section are alternately arranged in sequence along the length direction of the concrete pile body, the concrete pile body is also provided with a frustum-shaped pile section, and the thick pile section and the thin pile section are connected in a transitional manner by the frustum-shaped pile section.
9. A precast pile as defined in claim 1, wherein sleeves are pre-buried at both ends of the concrete pile body, and the ends of each main rib are respectively connected and fixed with a corresponding sleeve.
10. A precast pile according to claim 1, further comprising ferrules, wherein two of the ferrules are respectively fitted over sleeves provided at both ends of the concrete pile body.

Description

Precast pile Technical Field The utility model belongs to the technical field of building materials, and relates to a precast pile. Background The precast concrete pipe pile is widely applied in various construction engineering scenes due to excellent mechanical properties and construction convenience, and becomes ideal foundation material selection due to high bearing capacity and good stability in foundation engineering of high-rise houses, commercial buildings and super high-rise buildings. Particularly, under the condition of soft soil foundation, the prestressed high-strength concrete pipe piles (PHC piles) are used, so that foundation settlement can be effectively reduced, and the safety and stability of a building are ensured. At present, the precast concrete tubular pile on the market is formed by pouring concrete into a main reinforcement matrix composed of main reinforcements, the projection angle of the main reinforcements at two ends is usually 0 degrees, and according to conventional engineering cognition, the main reinforcements are kept straight, so that the bearing capacity of the precast concrete tubular pile is maximized, the load can be more effectively transmitted due to the linear form, the stress concentration point is reduced, and the overall stability and strength of the structure are ensured. However, with the development of engineering technology and the intensive research on material properties, it has been found that even under such a so-called "optimum design", there is room for a significant increase in the load-bearing capacity of precast concrete piles. Disclosure of utility model The present utility model has been made keeping in mind the above problems occurring in the prior art, and an object of the present utility model is to provide a precast pile, including: The cage rib framework consists of a main rib array formed by circumferentially arranging and distributing a plurality of main ribs and stirrups arranged around the main rib array; The concrete pile body is poured on the cage rib framework; On the projection of the length direction of the concrete pile body, one end of the main rib is deflected by an angle alpha along the circumferential direction of the concrete pile body relative to the other end of the main rib. In the precast pile, a central angle between two adjacent main ribs is θ, and the deflection angle α is smaller than the central angle θ. In the precast pile, the deflection angle α is greater than or equal to 0.5 °, and the circumferential deflection directions of the main ribs are the same. In the precast pile, the deflection angle α is less than or equal to 1/2 of the central angle θ, and the circumferential deflection angles of the main ribs are the same. In the precast pile, the deflection angle alpha ranges from 0 degrees to 3 degrees, and the main ribs deflect uniformly along the circumferential direction in the length direction of the concrete pile body. In the precast pile, the precast pile further comprises end plates, the two end plates are respectively arranged at two ends of the concrete pile body, the end plates are provided with end holes, and the end parts of the main ribs are arranged in the end holes. In the precast pile, the end hole comprises an anchor hole, a penetrating rib hole and a passing rib groove, and the anchor hole and the penetrating rib hole are connected through the passing rib groove. In the precast pile, the concrete pile body is provided with a thick pile section and a thin pile section, the thick pile section and the thin pile section are alternately arranged in sequence along the length direction of the concrete pile body, the concrete pile body is also provided with a frustum-shaped pile section, and the thick pile section and the thin pile section are in transitional connection through the frustum-shaped pile section. In the precast pile, sleeves are pre-buried at two ends of the concrete pile body, and the end parts of the main ribs are respectively connected and fixed with one corresponding sleeve. In the precast pile, the precast pile further comprises hoops, and the two hoops are respectively sleeved on sleeves at two ends of the concrete pile body. Compared with the prior art, the utility model has the beneficial effects that: 1. Controlling the axial deflection of the main bars helps to reduce the prestress loss, and the prestress technology counteracts the tensile stress possibly caused by external load by applying pressure to the concrete in advance, so that the service life and bearing capacity of the structure are prolonged. 2. The deflection angle of the main ribs is limited according to the number of the main ribs, if the main ribs are deflected too much axially, the prestress loss can be caused, and the risk of fracture of the end parts of the main ribs can be caused, so that the safety of the structure is seriously affected. 3. The deflection angle alpha is set to be at least 0.5 degrees, so that each