公开(公告)号：US20240302259A1

公开(公告)日：2024-09-12

申请号：US18578801

申请日：2023-06-02

Applicant: Qingdao University of Technology

Inventor： Nan YAN ,  Xiaoyu BAI ,  Jichao YIN ,  Dongdong MA ,  Yamei ZHANG ,  Shaoshuai XU ,  Yongliang XU ,  Guangliang ZHANG ,  Chenglu LV ,  Jiashan WANG ,  Zeqiang XU ,  Haojie DIAO

IPC: G01N3/60 ,  G01N3/08 ,  G01N33/24 ,  G06F30/20 ,  G06F119/14

CPC classification number: G01N3/60 ,  G01N3/08 ,  G01N33/24 ,  G06F30/20 ,  G06F2119/14

Abstract: The present disclosure provides a method and system for predicting pile tip resistance based on a damage constitutive model of mudstone and relates to the technical field of geotechnical engineering. In view of the existing problem of difficult calculation of quantitative analysis on the bearing performance of a dynamic driven pile of a mudstone foundation and the damage characteristics of mudstone around the pile, a damage constitutive model of mudstone with a damage variable D determined based on a stress state and associated with a rock failure criterion is established; model parameters are determined based on results of a triaxial test; a relationship between a critical damage variable and a confining pressure is established; and the damage characteristics of the mudstone around the dynamic driven pile are analyzed, whereby pile tip resistance is calculated. The requirements of quantitative analysis on the damage characteristics of a pile tip are met.

公开(公告)号：US20220275600A1

公开(公告)日：2022-09-01

申请号：US17678723

申请日：2022-02-23

Applicant: Qingdao University of Technology

Inventor： Xiaoyu BAI ,  Nan YAN ,  Yamei ZHANG ,  Mingyi ZHANG ,  Cuicui LI ,  Yongfeng HUANG ,  Yonghong WANG ,  Xiang FANG ,  Yujin JIAO ,  Lin YANG

IPC: E02D33/00 ,  E02D5/38

Abstract: The present disclosure provides a device and a method for testing the compression amount of a pile body of a rock-socketed cast-in-place pile. The testing device comprises open flexible pipes which are correspondingly bound with two main reinforcements in the pile body of the rock-socketed cast-in-place pile, and the lengths of the open flexible pipes are the same as those of the bound main reinforcements; one end of each of the two open flexible pipes is located at the bottom end of the corresponding main reinforcement and fixedly connected with a first sealing sheet, and the other ends of the two open flexible pipes are located at the pile block of the rock-socketed cast-in-place pile and fixedly connected with second sealing sheets; a closed rigid pipe is located in the open flexible pipe, pipe bodies of the closed rigid pipe and the open flexible pipe are not in contact.