路堤荷载作用下考虑土体固结系数变化的软基固结规律

摘要

The-theory-analysis-on-the-change-of-consolidation-coefficient-of-soil-was-carried,-and-through-the-field-test,-we-found-that-the-value-of-consolidation-coefficient-changed-largely,-which-led-the-actual-settlement-at-one-point-is-much-large-than-the-design-value.-Besides,-the-value-of-consolidation-coefficient-was-got-through-the-indoor-experiment-by-using-original-soil,-and-the-relationship-between-consolidation-coefficient-and-consolidation-stress-was-analyzed.-The-results-show-that,-the-consolidation-coefficient-of-the-soft-soil-in-sea-area-increases-in-the-beginning-when-the-stress-increases,-then-the-consolidation-coefficient-comes-to-a-peak-value,-after-that,-it-decreases-very-quickly,-and-finally-tends-to-a-stable-value.%针对土体固结系数的变化进行了理论分析，并通过现场试验发现固结系数在土体固结过程中变化很大，使得某一时刻土体的实际沉降量远大于设计值。同时，取现场原状土进行室内试验，测定土体的固结系数，研究固结系数与固结应力的关系。结果表明，对于海域中的超软土，土体固结系数随固结应力的增加而增加，达到某一峰值后开始迅速减小，最终趋于稳定。