US 12,360,070 B2
In-situ evaluation method and system for loess collapsibility based on non-destructive time-domain reflection technology
Jie Cao, Shaanxi (CN); Jiwen Zhang, Shaanxi (CN); Zaixin Wan, Shaanxi (CN); Qingyi Mu, Shaanxi (CN); Jianguo Zheng, Shaanxi (CN); Yuanqiang Zhou, Shaanxi (CN); Peng Gao, Shaanxi (CN); Dongjing Wang, Shaanxi (CN); Shuai Liu, Shaanxi (CN); Long Zhang, Shaanxi (CN); Zhi Liu, Shaanxi (CN); Xiao Dong, Shaanxi (CN); Jiao Lin, Shaanxi (CN); Hui Li, Shaanxi (CN); Lei Ran, Shaanxi (CN); Teng Yang, Shaanxi (CN); and Jian Chen, Shaanxi (CN)
Assigned to CHINA JIKAN RESEARCH INSTITUTE OF ENGINEERING INVESTIGATIONS AND DESIGN Co., Ltd, Shaanxi (CN); and Xi'an Jiaotong University, Shaanxi (CN)
Filed by CHINA JIKAN RESEARCH INSTITUTE OF ENGINEERING INVESTIGATIONS AND DESIGN, Co.,Ltd, Shaanxi (CN); and Xi'an Jiaotong University, Shaanxi (CN)
Filed on Apr. 13, 2023, as Appl. No. 18/134,557.
Claims priority of application No. 202210394637.8 (CN), filed on Apr. 13, 2022.
Prior Publication US 2023/0251221 A1, Aug. 10, 2023
Int. Cl. G01R 27/26 (2006.01); G01F 23/284 (2006.01); G01N 27/22 (2006.01); G01N 33/24 (2006.01)
CPC G01N 27/221 (2013.01) [G01F 23/284 (2013.01); G01N 33/246 (2013.01); G01R 27/2676 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An in-situ evaluation method for loess collapsibility based on nondestructive time domain reflectometry, comprising steps of:
S1: testing a time-domain reflection waveform diagram of the undisturbed loess at the site layout point through non-destructive time-domain reflection technology, and obtaining a dielectric constant, electrical conductivity and indoor calibration parameters of an undisturbed loess at a layout point according to the time-domain reflection waveform diagram;
S2: calculating a dry density and mass water content of the undisturbed loess at the layout point in combination with the dielectric constant, electrical conductivity and indoor calibration parameters of the undisturbed loess at the layout point obtained in step S1; and
S3: performing an in-situ evaluation of loess collapsibility through a mathematical model based on inputs of an original loess dry density, mass water content and basic physical property indexes calculated in step S2.