Abstract
The stress state is the basis for evaluating soil deformation and strength. To study the 3-D stress state of the soil, a 3-D stress device based on fiber Bragg grating (FBG) and a microelectromechanical system (MEMS) was designed to measure the 3-D stress state, principal stress, and direction of principal stress. First, the FBG 1-D earth pressure cell is developed and calibrated. Based on the calculation relationship between the normal stress and the 3-D stress state, and considering the device rotation, the 3-D stress device was developed and verified in the large-scale triaxial test. The results show that the range of the 1-D earth pressure cell is 1 MPa, and the linearity is within 2.5% FS. The device can effectively measure soil’s 3-D stress, principal stress, and direction. The measured results are consistent with the reference and theoretical results. The device provides a new method for effectively measuring 3-D stress in soil.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
