Experimental and Discrete Element Simulation Study on Disintegration of Marine Weathered Granite
SUN Bo
CAI Hao
ZHANG Qi
Abstract：Aiming at the impact of water-soaked soft disintegration of weathered granite on construction safety during the construction of rock-socketed monopile foundations for offshore wind turbines,the disintegration tests of marine weathered granite were carried out by designing a disintegration test apparatus.The influence of granite weathering degree and solution pH on the disintegration of granite was investigated,and the mechanism of disintegration of marine weathered granite was revealed.Furthermore,a numerical simulation of the disintegration of weathered granite was implemented based on the discrete element method.The research results show that the weathering degree of granite has a significant impact on the rate and degree of its disintegration.As the weathering degree of granite increases,the degree of disintegration changes from no obvious disintegration to partial disintegration and complete disintegration.The loss of clay mineral cementation is the main reason for the disintegration of marine weathered granite.The reaction between metal oxides in weathered granite and acidic solutions leads to an increased degree of disintegration.The discrete element model established on the basis of parallel bonding contact model can simulate the entire process of disintegration of weathered granite.
Keywords：rock-socketed pilemarine weathered granitedisintegration mechanismcementationdiscrete element
Publication Date：2023-12-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 58-67 )