离散单元法分析隔振沟引起的强夯变形和应力变化

doi:10.12066/j.issn.1007-2861.2230

Abstract

Abstract:

To analyze the influence of an isolation trench on the foundation deformation and stress induced by dynamic compaction, based on two-dimensional discrete element theory and a previous centrifuge model test of a sand foundation under dynamic compaction, a foundation model under dynamic compaction was established. The influence of depth and location of the isolation trench on the upheaval of the ground surface was studied. The stress variation in the range of 3 m outside the trench was discussed at a grain level. The results show that an isolation trench can effectively reduce the upheaval deformation of the ground surface; however, the location and depth of the isolation trench have little effect on it. The influence of the isolation trench on the stress change gradually decreases with the increase of the depth of the monitoring point. At a depth of >4 m below the ground, the effect of the isolation trench on the stress change far from the center of the ramming pit is very small.

Key words: dynamic compaction, discrete element method, isolation trench, upheaval, stress change

CLC Number:

TU43

LI Yuqi, YANG Fuan, ZHANG Wenjie. Effect of an isolation trench on deformation and stress induced by dynamic compaction based on the discrete element method[J]. Journal of Shanghai University（Natural Science Edition）, 2021, 27(6): 1085-1093.

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Effect of an isolation trench on deformation and stress induced by dynamic compaction based on the discrete element method

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