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土的结构性是决定各类土体物理力学特性最根本的内在因素。通过设计室内试验,模拟真空(预压)处理吹填软土的方法来研究等向应力作用下土体结构屈服应力形成。试验结果表明:等向应力条件下,土体结构的形成是几个因素综合作用的结果,其中排水条件最为关键。压力对土体结构屈服应力的影响通过排水条件起间接作用,且随时间的增加而增大。
The structural nature of soil is the most fundamental internal factor that determines the physical and mechanical properties of various types of soil. The yield stress of soil structure under isotropic stress was studied by means of designing laboratory tests and simulating the vacuum (pre-pressure) treatment of dredging soft soil. The results show that under the condition of equal stress, the formation of soil structure is the result of the combination of several factors, of which the drainage conditions are the most important. The effect of pressure on yield stress of soil structure plays an indirect role through drainage conditions and increases with time.