Dynamics of Freezing-Thawing Soil around Subway Shield Tunnels

This book addresses development laws for axial strain and excess pore water pressure in silty clay around subway shield tunnels before and after freezing-thawing when subjected to subway loading, as well as the effect of freezing-thawing on the dynamic parameters of silty clay, including the dynamic modulus and damping ratio, introducing readers to the design and construction of bypasses in subway tunnels with the artificial freezing method. On this basis, it then studies the microstructures of silty clay before and after freezing-thawing cyclic loading by means of scanning electron microscope tests and mercury intrusion porosimetry tests. Lastly, the book presents a numerical simulation of the dynamics of silty clay around subway tunnels before and after thawing.

Given its scope, it offers a valuable reference guide for construction researchers and designers alike, as well as senior undergraduate and graduate students at colleges and universities.

Professor Zhen-Dong Cui is Dean of the Institute of Geotechnical Engineering, China University of Mining and Technology. He received his Ph.D. Degree from the School of Civil Engineering, Tongji University, in 2008 and subsequently worked as a postdoctoral research fellow at the Hong Kong University of Science and Technology for one year. He was also a visiting scholar at the University of Colorado Boulder from 2015 to 2016. He has published 38 SCI-indexed papers in various international journals. He was nominated for inclusion in the 100 Excellent Doctoral Dissertations in China in 2011; was awarded the second prize for Natural Science by the Ministry of Education in 2013; and was awarded the third prize by Shanghai Natural Science in 2015. Professor Cui is a associate editor of Arabian Journal of Geosciences (SCI-indexed), a member of the soft soil engineering committee of the geotechnical engineering branch of the Civil Engineering Society of China; a member of the InternationalSociety for Soil Mechanics and Geotechnical Engineering (ISSMGE); and a member of the International Association for Engineering Geology and Environment (IAEG).

Chapter 1. Introduction.- Chapter 2. Artificial freezing for by-pass of subway tunnel.- Chapter 3. Axial strain of silty clay before and after freezing and thawing loading.- Chapter 4. Freezing-thawing on dynamic characteristics of silty clay.- Chapter 5. Microscopic pore structures of silty clay before and after freezing-thawing by SEM.- Chapter 6. Microscopic pore structures of silty clay before and after freezing-thawing by MIP.- Chapter 7. Dynamics of silty clay around subway shield tunnel before and after freezing andthawing by numerical simulation.- Chapter 8. Conclusions and prospects