深厚软岩填土不同能级强夯处理数值模拟研究

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关键词：软岩填土；强夯；不同能级；数值模拟；振动特性

中图分类号：TU472 文献标志码：A 文章编号：1005-8249（2025）06-0041-07

DOI：10.19860/j.cnki.issn1005-8249.2025.06.008

Abstract：Inorder toreveal the mechanismofdynamiccompactionreinforcementofdeepsoftrock fillfoundation，basedonthe dynamiccompactiontestof diferentenergylevelsofdeepsoftrockfill，athree-dimensionalmodelofhammer-softrockfil foundation was established.Thenonlineartheorywasintroducedtosimulatethedynamiccompactionoflow，medium，highand ultra-highenergylevels，andthedeformationandvibrationcharacteristicsofdeepsoftrock fillwerestudied.Theresultsshow thattheelastic modulusofthereinforced soillayerand thenumber oftampingtimes areinapower functiondistribution.The vibrationvelocityandvibrationacelerationdecayfaster near thetampingpoint，anddecayslowerfarawayfromthetamping point. Compared with 3 000，6 000 and 12 000， 15000kN⋅m ，although the dynamic energy level of the latter increases a lot，the influence of dynamic compaction on vibration is not significantly enhanced.The tamping energy ranges from 3000 to 15000kN⋅m ，and the efective reinforcement depth is distributed between 6.O and 11.6m . The research results can provide theoretical basis andtechnical guidancefortheanalysisandcalculationof dynamiccompactionengineeringofdeepsoftrockfllfoundation.

KeyWords：softrock fill；dynamiccompaction；diferent energylevels；numerical simulation；vibrationcharacteristics

0 引言

随着我国城市化进程的加速和土地需求的不断增加，“开山填洼”工程逐渐增多，软岩通常被用作回填材料，形成了深厚的软岩填土地基[1-2]。（剩余7025字）