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以天津地区海积软土为研究对象,在不同固结压力、不同固结时间作用下开展分别加载的一维固结试验,对固结后的原状样与相应重塑样进行微型十字板剪切测试,分析海积软土强度和变形特性受固结压力、固结时间及结构性等因素的影响。试验结果表明:天津海积软土在短时间固结作用下,强度和变形时效特性表现明显,且受结构性影响显著;在长时间固结作用下,土的强度和变形随固结压力和固结时间均呈衰减型增长,结构性对其影响程度随时间增长在减小;长期强度与土的初始强度、固结压力和时间有关,随土的初始强度和固结压力的增大而增大,而强度随时间增长达到最大值后又随之降低。
Taking the soft soil in Tianjin area as the research object, one-dimensional consolidation tests were carried out under different consolidation pressures and different consolidation times respectively. The original shape samples and the corresponding remolded samples after the consolidation were subjected to micro- Cut test, analysis of the strength and deformation characteristics of soft clay by the consolidation pressure, consolidation time and structural factors. The test results show that the strength and deformation aging characteristics of Tianjin marine soft soil are obvious under the effect of short-time consolidation, and are significantly affected by the structure. Under long-term consolidation, the strength and deformation of the soil vary with the consolidation pressure and The consolidation time decreases with the increase of time. The long-term strength is related to the initial strength of soil, consolidation pressure and time. With the increase of initial strength and consolidation pressure of soil Increase, while the intensity increases with time to reach the maximum and then decrease.