公开(公告)号：US11733146B1

公开(公告)日：2023-08-22

申请号：US18072319

申请日：2022-11-30

Applicant: Kunming University of Science and Technology

Inventor： Zhiquan Yang ,  Mao Chen ,  Yingyan Zhu ,  Yi Yang ,  Wentao Chen ,  Yuqing Liu ,  Muhammad Asif Khan ,  Bihua Zhang ,  Hanhua Xu ,  Tianbing Xiang ,  Jie Zhang

IPC: G01N15/08 ,  G01N33/38 ,  G01N33/24

CPC classification number: G01N15/0893 ,  G01N33/246 ,  G01N33/383

Abstract: A method for determining a column-hemispherical permeation radius with time-varying property of power-law cement grout and tortuosity of rock and soil mass is provided, including: acquiring a porosity ϕ of rock and soil mass and a corresponding permeation coefficient K by geotechnical tests, measuring a groundwater pressure P0 at a grouting point and determining tortuosity ξ of rock and soil mass; acquiring an initial consistency coefficient c0, a rheological index n and a time-varying property coefficient k of power-law cement grout with a designed water to cement ratio by rheological tests, and determining the viscosity of water μw; acquiring grouting parameters, including a grouting pressure P1, grouting time t, a number m of grouting holes of a side surface of a grouting pipe and a grouting hole radius r; and solving a column-hemispherical permeation grouting diffusion radius R considering coupling effect both the tortuosity of rock and soil mass and the time-varying property of power-law cement grout.