This book is a compilation of selected papers from the 2021 China-Europe International Conference on Pipelines and Trenchless Technology. The international academic conference is organized to
•             further promote the cause of trenchless works in China
•             ensure the quality of engineering construction
•             introduce advanced technology, equipment, and materials
•             promote the exchange and learning of trenchless technology
•             enhance the level of trenchless technology in China
•             improve the international influence of trenchless academics in China
•             promote the standardization and localization of trenchless technology in China
•             and lead the healthy development of the industry.
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