摘要
根据作者对饱和土中弹性波特性研究的结果,本文给出了由波速法确定饱和土层有效泊松比和总泊松比的公式.分析表明,有效泊松比与饱和土中的波速及孔隙率有关,其值低于总泊松比;总泊松比随土剪切模量的增大而有所减小,含气量的增多会使它急剧降低且以有效泊松比下为限;在地下水位上下土层内,总油松比沿深度的变化规律有所不同.采用群井抽水以获得非饱和土层,对此进行跨孔试验的结果输证了上述主要结论.
Based on authors' theoretical work on elastic wave propagation in saturated soils, this paper presents the equations for evaluating effective and total Poisson's ratios of saturated and highly-saturated soils by measurements of wave velocity. It can be seen from analysis that effective Poisson's ratio is always smaller than the total one, depending on wave velocities and porosity of the soil. Total Poisson's ratio decreases with increasing shear modulus, and decreases dramatically with increasing amount of air in soil voids and finally it reaches its low bound value, effecfive Poisson's ratio. Total Poisson's ratio does not vary monotonously with depth in the zone within which the ground water table fluctuates periodically. The field cross-hole test results obtained in unsaturated soil layers by drainage wells make fairly good agreement with the theories.
出处
《水利学报》
EI
CSCD
北大核心
1989年第1期37-43,共7页
Journal of Hydraulic Engineering
基金
国家教委博士点基金
