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天然结构性软土在工程中易受扰动,从而导致工程性质改变,结构强度降低,并影响最终沉降.本文在天然土体扰动机理的分析研究基础之上,提出了针对原位扰动土的折线形原位压缩曲线.根据天然结构性土体以结构屈服应力和转折应力为界的分段特性,考虑加载过程中压缩性的变化等方法,结合工程实例的计算,介绍如何利用原位压缩曲线以及扰动后压缩曲线的确定计算地基的最终沉降,分析施工扰动引起的最终沉降变化规律,预测了施工扰动对最终沉降的影响,取得了较好的结果.
The natural structural soft soil is easily disturbed in the project, which leads to the change of engineering properties, the decrease of the structural strength and the final settlement.This paper presents a new method for the disturbance of the original soil, based on the analysis of the disturbance mechanism of the natural soil, According to the subdivision characteristics of natural structural soil under the structural yield stress and turning stress, considering the change of compressibility during loading, combined with the calculation of engineering example, it is introduced how to use the in situ compression curve And the determination of the compression curve after the disturbance, the final settlement of the foundation is calculated. The variation law of final settlement caused by the construction disturbance is analyzed, and the effect of construction disturbance on the final settlement is predicted. Good results are obtained.