The mechanical performance parameters of marine soft soil are crucial for the design and construction of underground engineering in coastal cities. To address this, a granular discrete element analysis method was employed to establish a numerical model for the triaxial tests of marine soft soil. The model was validated by simulating the triaxial test process and comparing it with indoor experiments. The research results show that: The indoor axial strain development of marine soft soil follows a gradually stable pattern, with cumulative axial strain gradually increasing with the number of vibrations. Factors such as friction coefficient and cohesive strength have a significant impact on cumulative plastic strain. A higher friction coefficient results in greater internal frictional force between particles, making the specimen more resistant to deformation. The influence of the friction coefficient on cumulative plastic strain is particularly pronounced. Compared to the normal bond strength, the tangential bond strength has a more significant effect on the plastic strain of the specimen. Higher tangential bond strength controls the relative sliding between particles, making it more difficult for particles to undergo relative sliding.
Liu Dapeng
,
Wu Ke
,
Xu Wenbin
,
Xiao Wenbin
,
Lu Haijun
. Research on the Mechanical Parameters Characteristics of Marine Soft Soil Based on Discrete Element Method[J]. Chinese Journal of Underground Space and Engineering, 2024
, 20(S2)
: 681
-691
.
DOI: 10.20174/j.JUSE.2024.S2.20
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