Data underlying the publication/PhD thesis: A comprehensive journey on Dutch organic clays - from element testing through constitutive modelling towards a novel cyclic multidirectional shear device

It is the supplementary data for publications and the PhD thesis of Ching-Yu Chao. The research aims to address significant gaps in the understanding of the behaviour of Dutch soft organic clays under both monotonic and cyclic loading conditions. It focuses on stress-induced plastic anisotropy, the role of organic matter, and the impact of initial stress states in Dutch soft organic clays. Further, it aims to contribute to the field by: conducting experimental tests, Refining existing models, and Developing advanced testing apparatus: Setting up an innovative cyclic shear apparatus called CYC-DoSS. This apparatus aims to provide high-frequency, multi-directional, and complex cyclic loading patterns. Equipped with state-of-the-art measurement systems like bender elements, accelerometers, and pore pressure transducers, it will yield a unique and reliable dataset for model development, calibration, and validation. This addresses existing limitations in current equipment, which cannot control or measure lateral stresses or offer nuanced insights into hydromechanical coupling. This research aims to push the boundaries of current knowledge and technology, providing more reliable models and dataset for the understanding and application of Dutch soft organic clays in engineering practice.