Harry Sze, Hong Kong

Harry obtained his Bachelors degree in Building Engineering (Structural and Geotechnical Engineering) from the City University of Hong Kong in 2013, prior to joining the Geotechnics team of Ove Arup & Partners Hong Kong Ltd as a graduate engineer. He has been involved in ground investigation planning, design of excavation and lateral support systems, site formation and foundation works and feasibility studies of enhanced use of underground space in Hong Kong.

He currently works as an Assistant Resident Engineer, supervising deep shaft excavation and reclamation at Hong Kong Zhuhai-Macao Bridge.

Micro-mechanic Behaviour of Sand Particles

Discrete Element Method (DEM) has recently been studied and developed to analyse granular soil behaviour on the microscale level. However, there are limited laboratory test results on both the micro- and macromechanical behaviour of sand particles. Hence a laboratory based study has been carried out.

This presentation will show the results of a study where load-deflection response and tensile strength of soil particles were examined separately. Single-particle crushing tests and multi-particle crushing tests were carried out. Two different sizes (1 and 2mm) of Leighton Buzzard sand were tested in this study. The analysis was based on the calculation of the probability of surviving grain splitting, according to the Weibull theory. The results from the multi-particle crushing tests showed that the strength of some particles did not decrease as the contact numbers between the particles increased. In the load-deflection analysis, plastic response occurred during the first unloading.


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