摘要
太沙基—维固结理论的一条重要假设是孔隙水压力消散过程中,土体的压缩系数(a_v),渗透系数(K)均不变。对于饱水粘性土尤其对淤泥,这种假设并不成立。笔者设计了K_o固结仪对饱水粘性土进行了试验,得出了渗透固结过程中土体的孔隙比(e),a_v,K及受其控制的固结系数(C_v)的变化规律并结合其它试验资料对饱水粘性土渗透固结的微观机理进行了探讨,最后对有效应力原理提出了新的看法,以便今后建立更符合实际的一维固结模型。
One of the most important assumptions in Terzaghi's umdimeosional consolidation theory is that the compressibility coefficient(av)and parmeability coefficient(K)are constant in the process of dissipation of excess pole water pressure. It doesn't hold water for saturated cohesive soil especially marine mud. In order to make experiment for saturated cohesive soil, the author designeed a special dedvice for ko consolidation test. On the basis of data lecorded from this test, the changing rules of pore ratio(e), av, k as well as consolidation coefficient (ev)controlled by them were obtained. Then the study is done on the micromechanics of permeability consolidation using other test data. At last, a new expression on principle of effective stress is proposed for the establishment of a unidimensional consolidation model which tallies better with reality.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
1991年第1期6-12,共7页
Hydrogeology & Engineering Geology
