论文部分内容阅读
海陆交互相沉积软土是珠江三角洲内广泛分布的不良地基土,土类主要为含粉细砂的淤泥和淤泥质黏土,基本力学特性较一般海相软土有所不同。基于广州南沙万顷沙组(Q4W)灰黑色淤泥质土的一系列室内试验成果,系统分析和研究了土体固结作用对基本力学特性的影响,包括渗透特性、剪切强度特性、次固结特性、直接剪切蠕变特性、三轴压缩蠕变特性、回弹特性等,提出了考虑固结效应的量化分析方法。为适应工程需要,这些分析方法所涉及的参数大多可通过简单/常规的试验方法确定。
The soft clay of sea-land interaction facies is widely distributed in the Pearl River Delta. The soil types are silt and silt clay with fine silt. The basic mechanical properties are different from those of the general marine soft soil. Based on a series of laboratory tests on gray-black muddy soil of Q4W in Nansha, Guangzhou, the effects of soil consolidation on basic mechanical properties were systematically analyzed and studied, including permeability characteristics, shear strength characteristics, secondary consolidation Characteristics, direct shear creep characteristics, triaxial compression creep characteristics, springback characteristics and so on, a quantitative analysis method considering the consolidation effect is proposed. To meet engineering needs, the parameters involved in these methods of analysis are mostly determined by simple / routine test methods.