报告题目：Application of Optical Fibre Sensors for Geotechnical Engineering Monitoring
地点：腾讯会议，会议号723 277 007
Optical fibre sensors have been accepted as potential sensing technologies to replace conventional sensors due to the advantages of small size, light weight, high resolution, ease of encapsulation, and immune to EMI. In this study, a number of application studies will be presented to investigate the feasibility of using optical fibre sensors for geotechnical monitoring, such as pile monitoring, and soil nail behaviour monitoring. It is found that the fully distributed optical fibre sensors can be used for monitoring large-scale structures. Development of new optical fibre pressure and tilt sensors using fused deposition modelling (FDM) method will be presented as a potential method to fabricate new sensors. These developed sensors fabricated using FDM are characterized by the advantages of small size, flexible, ease of design and fabrication, and high resolution.
Dr. Chengyu Hong is currently an Assistant Professor of the College of Civil and Transportation Engineering, joined SZU in March 2019. He received his B.Eng in Civil Engineering from Shijiazhuang Railway Institute, Shijiazhuang, China and his Ph.D in Geotechnical Engineering from Hong Kong Polytechnic University. His research interests primarily include interaction behavior between soil and structures, geotechnical monitoring, design and fabrication of optical fiber sensors using fused deposition modelling method.
报告题目：Development of Cavity Expansion Theory and Its Applications in Geotechnical Engineering
地点：腾讯会议，会议号723 277 007
In this presentation, the undrained and drained spherical cavity expansion in clays are analyzed following a new viewpoint, in which this boundary problem is treat as integration of stress-strain following cavity expansion load paths. The widely adopted substepping scheme numerical integration technique is used in developing the undrained and drained solution of cavity expansion problems based on modified UH model, the original and modified two-bubble surface model. This bounding surface plasticity series model had been proved that it has inherent advantages in capturing the overall soil behaviour for clays with different consolidation history than the other critical state models under classical plasticity framework, especially for predicting the nonlinear soil response at the early stage of cavity expansion for a soil stress state initially located beneath the yield surface for previous consolidation. Therefore, the newly developed solution can be served as a useful tool in many geotechnical engineering problems, like to interpret the results of cone penetration tests as well as to predict the excess pore-pressure generated during pile installation.
Dr. Xiong Xiao is currently a post-doctoral researcher of the College of Civil and Transportation Engineering, joined SZU recently. He received his B.Eng in Civil Engineering from South China University of Technology, Guangzhou, China, M.Eng in Geotechnical Engineering from National Cheng-kung University, Taiwan, China and his Ph.D in Geotechnical Engineering from the University of Newcastle, Australia.
His research interests primarily include constitutive model, numerical analysis, soft soil improvement, in situ testing and underground energy structure.