2023年11月水运工程Nov.2023第11期总第616期Port&WaterwayEngineeringNo.11SerialNo.616·地基与基础·广西航运枢纽工程新近系泥岩岩土参数取值∗韦世贵(广西交通设计集团有限公司,广西南宁530029)摘要:由于第三系泥岩地层时代新、成岩差、岩性软弱、模量低、强度低、承载力不高,特别是在卸荷或开挖暴露后易受环境条件影响,岩体的工程地质性质变化大,常规的岩石试验方法得到的指标往往比真实值低。依托广西航运枢纽工程,现场开展岩体载荷试验、钻孔声波速测试和旁压试验,研究广西新近系泥岩的地基容许承载力。采用SPSS数据分析软件,对地基容许承载力、钻孔纵波波速、岩体完整性系数的相关性进行分析,最终得出相关公式,可通过钻孔声波速测试间接获取新近系泥岩的地基容许承载力。研究可为类似工程提供借鉴和参考。关键词:岩土参数;载荷试验;旁压试验;地基容许承载力;岩体完整性系数中图分类号:U612文献标志码:A文章编号:1002-4972(2023)11-0198-06ParametervaluesofNeogenemudstonerockinGuangxishippinghubprojectWEIShiguiGuangxiTrafficDesignGroupCo.Ltd.Nanning530029ChinaAbstractTheengineeringgeologicalpropertiesoftherockmasschangegreatlybecauseoftheneodiagenesisdiagenesisdifferencelithologyweaknesslowmoduluslowstrengthandlowbearingcapacityoftheTertiarymudstonestratawhicharesusceptibletoenvironmentalconditionsespeciallyafterunloadingorexcavationexposureandtheindexobtainedbyconventionalrocktestmethodsisoftenlowerthanthetruevalue.InthispaperaccordingtotherockmassloadingtestboreholeacousticwavevelocitytestandsidepressuretestcarriedoutonsiteinGuangxishippinghubprojecttheallowablebearingcapacityofthefoundationoftheNegenemudstoneinGuangxiisstudied.SPSSdataanalysissoftwareisusedtoanalyzethecorrelationbetweentheallowablebearingcapacityofthefoundationthelongitudinalwavevelocityoftheboreholeandtherockmassintegritycoefficientandfinallytherelevantformulaisobtained.TheallowablebearingcapacityofNeogenemudstonefoundationcanbeobtainedindirectlythroughboreholeacousticwavevelocitytest.Theresearchcanprovidereferenceforsimilarprojects.Keywordsrockandsoilparametersloadtestsidepressuretestallowablebearingcapacityoffoundationcoefficientofrockintegrity收稿日期:20...
