扰动土性状研究及在环境治理工程中的应用

地下采煤等地下开采活动造成的地面沉陷破坏日益加剧，尤其是地表下沉对建筑物、桥梁、公路、铁路等设施造成的影响不容忽视．本文采用扰动土的观点，将采动区地表土体视为受开采扰动土体，采用数值模拟、现场取样等手段，研究了土体在受地下开采扰动影响下的应力路径、物理性质的变化及抗剪强度指标的变化规律．研究表明，地下开采对土体含水量、土体孔隙比等地表土物理力学性质有较大影响．最后给出了一个用扰动土理论指导进行地基加固的工程实例．

Research on Disturbed Soil and Its Application in Environmental Engineering

Underground mining leads to mining subsidence. It is disadvantageous to the buldings, bridges, highways and railways. Based on the disturbed soil theory, we think the topsoil in mining areas as the disturbed soil by underground mining. By numerical simulation and samples experiments, the stress paths of the disturbed soil and the changing of the physical properties and the mechanics properties were studied. It indicates that the underground mining effects on the physical and mechanical properties of the disturbed soil, such as moisture content, fraction void et al. Finally, an engineering example using the disturbed soil theory to reinforce the foundation was presented.