【作者】 周梁；

【导师】 夏唐代；

【作者基本信息】 浙江大学 ， 岩土工程， 2003， 硕士

【摘要】 利用瞬态锤击法来测定粉砂土的密实度是一项新课题。本文通过试验获得的数据，分析地基土的动力参数与土体的本身性质之间的关系，并应用动力基础半空间理论，得到了全新的利用瞬态锤击法来测定粉砂土的密实度的方法。 地基土的主要动力参数为土的动剪切模量，而利用实验所得的数据，分析动剪切模量G与地基土的干密度(孔隙比)、含水量以及地基土的剪切变形等参数之间的关系，就可以得到地基土的动剪切模量的表达式。 通过采用动力基础半空间理论，分析锤击产生的地基土的振动频率与地基土的动剪切模量之间的相关关系，就又可以得到地基土自振动频率与土体本身性质之间的关系，即与土体的密实度之间的关系。 这样，采用本文所得到的分析结果，利用落锤冲击地基土，通过分析试验得到的数据，就可以得到待测地基土的密实度。更多还原

【Abstract】 The instant hammering method to measure the density of silt or sand subsoil is a new research subject. By using the data of the experiment,this dissertation has analysed the relationship between the dynamic parameter and the self-property,then based on the elastic half space theory of the dynamic foundation,this dissertation get the method to measure the density of silt or sand subsoil using instantaneous implusion.The main dynamic parameter of the subsoil is the dynamic shear modulus. Base on the data of the experiments,analyzing the relationship between the dynamic shear modulus and the characteristic parameters such as the density,the water content and the shear distortion,the expression of the dynamic shear modulus of the subsoil is picked out.Base on the elastic half space theory of the dynamic foundation,analyzing the relationship between the vibration frequency and the dynamic shear modulus of the soil,a relationship between the vibration frequency and the self-property of the subsoil can be carried out.That is the expression about the relationship between the vibration frequency and the density of the soil can be carried out.Thus,based on the method recommended by this dissertation,using instant hammering the subsoil,by analyzing the data,the density of the subsoil can be got.更多还原