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为了防止在振动和静重共同作用下地基沉陷过大和强度破坏,在设计中,都采用许可应力法。虽然,与振动沉陷有关的土振动压密试验和振动剪切试验,国内外有不少研究工作者在室内作了很多工作,但由于试验条件、方法等种种原因,这些成果尚不能直接用于振动沉陷的实际计算中。因此,研究这个问题,特别是对松散砂类土地基的振动沉陷问题,更有其重要意义。本文主要通过野外振动载荷试验,分别对圆砾、粗砾砂、砂卵石三种土层进行了试验,探讨在静重和振动共同作用下松散砂砾卵石地基的强度和变形的一般规律,初步提出了地基变形和强度破坏的控制条件及近似计算方法。
In order to prevent the ground subsidence and the strength from being destroyed under the action of vibration and static weight, the permissible stress method is used in the design. Although there are many researchers at home and abroad who have done a lot of work in the laboratory on the soil vibration compaction test and vibration shear test related to vibration subsidence, these results cannot be directly applied due to various conditions such as test conditions and methods. The actual calculation of vibration subsidence. Therefore, studying this issue, especially the problem of vibration subsidence of loose sands, is of greater significance. In this paper, through field vibration load tests, three kinds of soil layers, namely, gravel, coarse gravel, sand and gravel, were tested to investigate the general laws of strength and deformation of loose gravel and gravel foundations under the action of static weight and vibration. The control conditions and approximate calculation methods for ground deformation and strength failure.