CN-122019923-A - Method, system and storage medium for calculating displacement of pile foundation bearing platform

CN122019923ACN 122019923 ACN122019923 ACN 122019923ACN-122019923-A

Abstract

The application relates to a group pile foundation bearing platform displacement calculation method, a system and a storage medium, wherein the method is characterized by acquiring characteristic data of a bearing platform; the method comprises the steps of processing characteristic data based on a preset friction algorithm to obtain the maximum static friction force of the bottom of a pile cap, processing the characteristic data based on a preset horizontal force algorithm to obtain the bottom horizontal force of the bottom of the pile cap, selecting a target displacement equation to process the characteristic data according to the bottom horizontal force and the maximum static friction force to obtain the target displacement data of the pile cap, and realizing the displacement calculation of the foundation pile cap of the group pile. According to the application, by processing the maximum static friction force and the bottom horizontal force at the bottom of the bearing platform, whether the bearing platform slides or not is judged, and then the target displacement equation is selected to process the characteristic data, so that the target displacement data of the bearing platform is obtained, the calculation accuracy of the displacement of the bearing platform is improved, the calculation of the actual stress state of the bearing platform is more attached, and the design safety and economy of the bearing platform are improved.

Inventors

XING MING
DAI CHUNFENG
FANG YANHUA
LIU QIANG
HAN JING
LI ZEHONG
LIANG DAHANG
REN MEILING
ZHOU YIXUAN
ZENG RENYUAN
YANG CHAO
ZHANG DONG
REN KUN
LI QI
LU JIMIN

Assignees

佛山电力设计院有限公司

Dates

Publication Date: 20260512
Application Date: 20260211

Claims (12)

1. The group pile foundation bearing platform displacement calculation method is characterized by comprising the following steps of: acquiring characteristic data of a bearing platform; Processing the characteristic data based on a preset friction algorithm to obtain the maximum static friction force at the bottom of the bearing platform; processing the characteristic data based on a preset horizontal force algorithm to obtain the bottom horizontal force of the bottom of the bearing platform; and selecting a target displacement equation to process the characteristic data according to the bottom horizontal force and the maximum static friction force, and obtaining bearing platform target displacement data.
2. The method for calculating the displacement of the pile foundation caps according to claim 1, wherein the target displacement equation comprises a first displacement equation and a second displacement equation; Selecting a target displacement equation according to the bottom horizontal force and the maximum static friction force to process the characteristic data to obtain bearing platform target displacement data, wherein the method comprises the following steps: When the bottom horizontal force is smaller than or equal to the maximum static friction force, processing the characteristic data based on the first displacement equation to obtain the bearing platform target displacement data; and when the bottom horizontal force is larger than the maximum static friction force, processing the characteristic data based on the second displacement equation to obtain the bearing platform target displacement data.
3. The method for calculating displacement of pile foundation caps according to claim 2, wherein the cap target displacement data includes target vertical displacement and target horizontal displacement of the caps; the first displacement equation comprises a static equilibrium equation set established based on a displacement coordination condition that the bearing platform is a rigid body and a linear relation between pile top counter force and pile top displacement.
4. A method of displacement calculation of a pile foundation cap according to claim 3, wherein the first displacement equation comprises: Wherein, the For the vertical displacement of the target, For the horizontal displacement of the object to be achieved, Is the vertical force of the bearing platform, For the weight of the bearing platform, The vertical resistance of the bearing platform is received when the bearing platform generates unit vertical displacement.
5. The method for calculating displacement of pile foundation caps according to claim 2, wherein the cap target displacement data includes target vertical displacement and target horizontal displacement of the caps; The second displacement equation comprises the steps of setting the friction force at the bottom of the bearing platform as the maximum static friction force, and establishing a new static equilibrium equation set based on the maximum static friction force so as to calculate the target displacement data of the bearing platform.
6. The method of claim 5, wherein the second displacement equation comprises: Wherein, the For the vertical displacement of the target, For the horizontal displacement of the object to be achieved, Is the vertical force of the bearing platform, For the weight of the bearing platform, Is the vertical resistance to the bearing platform when the bearing platform generates unit vertical displacement, Is the reverse bending moment received by the bearing platform when the bearing platform generates a unit rotation angle, Is the horizontal resistance force to be applied to the bearing platform when the bearing platform generates unit rotation angle, Is the horizontal resistance force applied to the bearing platform when the bearing platform generates unit vertical displacement, The horizontal resistance force applied to the bearing platform when the bearing platform generates unit horizontal displacement is H, wherein H is a preset horizontal force value applied to the bottom of the bearing platform, and M is a preset bending moment value applied to the bottom of the bearing platform.
7. The method for calculating displacement of pile foundation caps according to claim 1, wherein the preset friction algorithm is: Wherein, the For the maximum static friction force to be the same, In order to provide a coefficient of friction, Is the vertical force of the bearing platform, Is the weight of the bearing platform.
8. The method for calculating displacement of pile foundation caps according to claim 1, wherein the preset horizontal force algorithm is: Wherein, the For the vertical displacement of the target, For the horizontal displacement of the object to be achieved, For the rotation angle of the object to be achieved, Is the vertical force of the bearing platform, For the weight of the bearing platform, Is the vertical resistance to the bearing platform when the bearing platform generates unit vertical displacement, Is the vertical resistance to the bearing platform when the bearing platform generates unit horizontal displacement, Is the vertical resistance to the bearing platform when the bearing platform generates a unit rotation angle, Is the horizontal resistance force applied to the bearing platform when the bearing platform generates unit vertical displacement, Is the horizontal resistance force applied to the bearing platform when the bearing platform generates unit horizontal displacement, Is the horizontal resistance force to be applied to the bearing platform when the bearing platform generates unit rotation angle, Is the reverse bending moment of the bearing platform when the bearing platform generates unit vertical displacement, Is the reverse bending moment of the bearing platform when the bearing platform generates unit horizontal displacement, The bending moment applied to the bearing platform when the bearing platform generates a unit rotation angle is set in advance, H is a preset horizontal force value applied to the bottom of the bearing platform, and M is a preset bending moment value applied to the bottom of the bearing platform.
9. The method of claim 4, wherein the table target displacement data further comprises a target rotation angle of the table, and the first displacement equation further comprises: Wherein, the For the rotation angle of the object to be achieved, And the bending moment is the reverse bending moment received by the bearing platform when the bearing platform generates a unit rotation angle, and M is a bending moment preset value acting on the bottom of the bearing platform.
10. The method of claim 6, wherein the table target displacement data further comprises a target rotation angle of the table, and the second displacement equation further comprises: Wherein, the For the rotation angle of the object to be achieved, Is the vertical force of the bearing platform, For the weight of the bearing platform, Is the vertical resistance to the bearing platform when the bearing platform generates unit vertical displacement, Is the reverse bending moment received by the bearing platform when the bearing platform generates a unit rotation angle, Is the horizontal resistance force to be applied to the bearing platform when the bearing platform generates unit rotation angle, Is the horizontal resistance force applied to the bearing platform when the bearing platform generates unit vertical displacement, The horizontal resistance force applied to the bearing platform when the bearing platform generates unit horizontal displacement is H, wherein H is a preset horizontal force value applied to the bottom of the bearing platform, and M is a preset bending moment value applied to the bottom of the bearing platform.
11. The group pile foundation pile cap displacement calculation system is characterized by comprising a processor, wherein the processor is used for executing the steps of the group pile foundation pile cap displacement calculation method according to any one of claims 1 to 10.
12. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the group pile foundation cap displacement calculation method of any one of claims 1 to 10.

Description

Method, system and storage medium for calculating displacement of pile foundation bearing platform Technical Field The application relates to the technical field of pile foundation design, in particular to a pile foundation pile cap displacement calculation method, a pile foundation pile cap displacement calculation system and a storage medium. Background At present, the industries of construction, highway, railway and the like generally calculate the vertical displacement, the horizontal displacement and the rotation angle of a group pile foundation bearing platform according to a traditional calculation formula (such as the formula listed in annex of building pile foundation technical Specification (JGJ 94-2008)). In the design of the foundation of the electric power pole tower, because the load in the horizontal direction is larger, in order to reduce the bending moment transferred to the bottom surface of the bearing platform and make the stress of each foundation pile uniform, the pile group foundation bearing platform is usually rotated by a preset angle (such as 45 degrees) and the main column is arranged eccentrically. The measure can effectively control the dosage of concrete and reinforcing steel bars and improve the structural economy. However, after the bearing platform rotates by a certain angle (such as 45 degrees), the horizontal force in a certain direction is obviously reduced, even approaches zero after the horizontal force in the original coordinate system is subjected to coordinate transformation. If the conventional method is still adopted to calculate the directional displacement, the influence of slip judgment and coordinate transformation is not considered, so that the deviation between the calculation result and the actual situation is larger, and the design safety and the economy are influenced. Therefore, a displacement calculation method considering the sliding state of the table and the coordinate system transformation is needed. Disclosure of Invention In order to solve the problems in the conventional pile foundation pile cap displacement calculation method, a pile foundation pile cap displacement calculation system and a storage medium are provided. In a first aspect, the present application provides a method for calculating displacement of a pile foundation cap, including: acquiring characteristic data of a bearing platform; processing the characteristic data based on a preset friction algorithm to obtain the maximum static friction force at the bottom of the bearing platform; Processing the characteristic data based on a preset horizontal force algorithm to obtain the bottom horizontal force of the bottom of the bearing platform; And selecting a target displacement equation to process the characteristic data according to the bottom horizontal force and the maximum static friction force, and obtaining the bearing platform target displacement data. In one embodiment, the target displacement equation includes a first displacement equation and a second displacement equation; selecting a target displacement equation to process the characteristic data according to the bottom horizontal force and the maximum static friction force to obtain bearing platform target displacement data, wherein the method comprises the following steps: When the bottom horizontal force is smaller than or equal to the maximum static friction force, processing the characteristic data based on a first displacement equation to obtain bearing platform target displacement data; and when the bottom horizontal force is greater than the maximum static friction force, processing the characteristic data based on a second displacement equation to obtain bearing platform target displacement data. In one embodiment, the platform target displacement data includes a target vertical displacement and a target horizontal displacement of the platform; the first displacement equation comprises a static equilibrium equation set established based on a displacement coordination condition that the bearing platform is a rigid body and a linear relation between pile top counter force and pile top displacement. In one embodiment, the first displacement equation includes: Wherein, the For the vertical displacement of the target,For the horizontal displacement of the object to be achieved,Is the vertical force of the bearing platform,For the weight of the bearing platform,The vertical resistance of the bearing platform is received when the bearing platform generates unit vertical displacement. In one embodiment, the platform target displacement data includes a target vertical displacement and a target horizontal displacement of the platform; The second displacement equation comprises the steps of setting the friction force at the bottom of the bearing platform as the maximum static friction force, and establishing a new static equilibrium equation set based on the maximum static friction force to calculate target displacement data