基于振动排水固结试验的软土动力特性研究
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摘要
基于振动排水固结试验,对镇江地区河漫滩沉积相软土的动力特性进行了研究,并对该地区软土在动力荷载作用下的排水固结机理进行了解释。通过振动排水固结试验,对在考虑振动荷载参数(频率、幅值、围压、波形)条件下软土的排水速率、应变速率以及物理力学指标的变化进行了分析。结果表明:相对于单一的静压固结排水方法,振动固结排水可以有效加速软土的排水速率,降低孔隙比,提高其抗剪强度,从而提高软土固结排水效果,这对镇江地区河漫滩沉积相软土地基的处理具有借鉴和指导意义。
Based on vibration drainage consolidation laboratory,the dynamic characteristics of flood land sedimentary soft soil is studied in this paper.And the drainage consolidation mechanism of soft soil is explained under dynamic loading.Through vibration drainage consolidation laboratory,the drainage rate,strain rate and physico-mechanical index of soft soil are analyzed under dynamic loading.The conclusion are as following:compared with static pressure consolidation drainage,the vibration method is more effective to accelerate drainage,reduce void ratio,increase shear strength of soft soil,which has reference and guiding significance in foundation treatment.
Based on vibration drainage consolidation laboratory,the dynamic characteristics of flood land sedimentary soft soil is studied in this paper.And the drainage consolidation mechanism of soft soil is explained under dynamic loading.Through vibration drainage consolidation laboratory,the drainage rate,strain rate and physico-mechanical index of soft soil are analyzed under dynamic loading.The conclusion are as following:compared with static pressure consolidation drainage,the vibration method is more effective to accelerate drainage,reduce void ratio,increase shear strength of soft soil,which has reference and guiding significance in foundation treatment.
引文
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[4]薛茹,李广慧.动力排水固结法加固软土路基的模型试验研究[J].岩土力学,2011,32(11):3242~3248.
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[6]张季超,梁铁锚,杨永康.动力排水固结法处理软土地基的关键技术研究[J].施工技术,2012,41(24):42~45.
[7]张大军,李彰明,刘俊雄.超软土地基静动力排水固结法处理的竖向排水体系影响因素分析[J].施工技术,2014,43(4):97~100.
[2]Hansbo S.Dynamic Consolidation of Mixed Fill-acost-effective Alternative to Piling a Case Record[J].Geotechnique,1996,46(2):351~355.
[3]李彰明,刘俊雄.高能量冲击作用下淤泥孔压特征规律试验研究[J].岩土力学,2014(2):339~345.
[4]薛茹,李广慧.动力排水固结法加固软土路基的模型试验研究[J].岩土力学,2011,32(11):3242~3248.
[5]刘勇健,李彰明,张丽娟.动力排水固结法在大面积深厚淤泥软基加固处理中的应用[J].岩石力学与工程学报,2010,29(S2):4000~4007.
[6]张季超,梁铁锚,杨永康.动力排水固结法处理软土地基的关键技术研究[J].施工技术,2012,41(24):42~45.
[7]张大军,李彰明,刘俊雄.超软土地基静动力排水固结法处理的竖向排水体系影响因素分析[J].施工技术,2014,43(4):97~100.