Open AccessStudy on the application of excess pore water pressure in analyzing the effect of dynamic compaction for the subgrades filled with aeolian sand and gravel soil underwater
Author(s) -
Liang He,
Xuegang Wang,
Zhijun Liu,
Teng Chao
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/768/1/012086
Subject(s) - compaction , aeolian processes , underwater , pore water pressure , geotechnical engineering , geology , aeolian sand , environmental science , geomorphology , oceanography
This text selects subgrades filled underwater in the section of Taitema lake of an expressway project in Xinjiang. The underwater deep treatment of aeolian sand and gravelly soil subgrades were carried out by dynamic compaction, and excess pore water pressure of that was monitored during compaction. The consolidation effects after dynamic compaction were compared. The results showed that: After dynamic compaction, excess pore water pressure in subgrades of aeolian sand and gravel soil increases as the number of tamping, and dissipates quickly after tamping. The subgrade strength of aeolian sand and gravel soil is improved obviously after dynamic compaction, but the overall reinforcement effect of gravel soil subgrade is better than that of aeolian sand subgrade, so gravel soil should be chosen first when the subgrade is filled underwater.