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软黏土结构性强、灵敏度高,土工试验结果受取/制样扰动影响大,无侧限抗压强度仅为天然强度的47.3%。试样经过K_0预固结处理后,无侧限抗压强度恢复至天然强度的77.8%,消除了部分取(制)样扰动的影响,抗剪强度更接近天然强度,更为合理、经济。另外,根据软土层的各种力学指标随埋深的增大而提高的特点,提出针对具体工程情况,优化地层划分的方法。
Soft clay has strong structure and high sensitivity, and the test results of soil are greatly affected by the sampling / sample preparation disturbance. The unconfined compressive strength is only 47.3% of the natural strength. After K_0 pre-consolidation treatment, the unconfined compressive strength was restored to 77.8% of the natural strength, which eliminated the influence of some sample-like disturbances. The shear strength was closer to the natural strength, which was more reasonable and economical. In addition, according to the characteristics of various mechanical indexes of soft soil layer increasing with the buried depth, the method of optimizing the strata division is put forward according to the specific engineering conditions.