淤泥固化土的静力特性研究

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DOI：10.19860/j.cnki.issn1005-8249.2025.04.014

KONG Lingyi，QI Xionggui²， ZHU Fuqiang'，LI Yinlu²，MENG Lijun²， ZHU Yongyang³ （1. China Construction Port Construction Group Co.， Ltd.， Qingdao 266O11，China; 2.Tai'an City Transport Bureau Port Aviation Railway Airport Service Center，Tai'an 271OO，China; 3. Geotechnical Research Institute of Hohai University，Nanjing 21Oo98，China）

Abstract：Thisstudyinvestigatedtheefectsofinitial watercontent，cementdosage，flyash content，andcuringageonthe staticcharacteristicsof sltsolidifiedsoil throughunconfiedcompresivestrengthtests.Theresultsindicatedthatthestrengthof thesolidified soildecreasedwith increasing initial watercontent.Theminimumcement dosagesrequiredto meetthestrength criterion for railway subgrade surface layers （ 500kPa ）were 6% ， 8% ，and 10% at initial water contents of 50% ， 60% ，and 70% ，respectively.Alinear relationship wasobserved between cement dosage and strength，with extrapolated zero－strength cement thresholds of 1.28% ， 2.24% ，and 3.31% for the three water content levels. The influence of fly ash on strength exhibited water content dependency ： strength decreased with fly ash addition at 50% water content，showed an initial increase followed by reduction at 60% water content，and demonstrated progressive enhancement at 70% water content. The strength increased throughout the 28- day curing period，with higher growth rates observed during the 7-14 days phase compared to the 14-28days phase.Thesefindings elucidatethecoupled efects of multiple factorsonstrength evolutionand provide practical mixproportion guidelines for the resource utilization of dredged silt. Key words： silt solidified soil；cement；fly ash； static characteristics；peak strength

0 引言

疏浚淤泥的规模化弃置引发土地占用与二次污染风险，其资源化利用亟需解决力学性能不足的核心瓶颈。（剩余7402字）