粘土的结构性与超固结

土体中的结构性与超固结都可以使土体表现出超固结特性。通过结构性与超固结对土体力学性质影响比较,揭示了它们对土体力学性质的影响存在本质差异,需要将它们区分开来。基于土体中的结构性、超固结对土体固结特性的影响差异及粘土的正常固结线的唯一性,提出了粘土的结构性与超固结的定量描述方法,据此对原状粘土进行分类。土体的结构性主要包括土体的化学胶结等真正改变了土样结构的因素,用结构性参数来定量描述,而次固结、干缩作用可看成与超固结作用一致,一起用超固结参数来定量描述。

The Structure and Overconsolidation of Clay

The overconsolidation phenomenon could be induced by structure and overconsolidation of soils. The structure and overconsolidation of soils must be distinguished for their essential different effects on the mechanical characteristics of soils. Based on their different effects and the uniqueness of the normal consolidation line of clay, a quantitative evaluation method of the structure and overconsolidation of clay is put forward and clay is classified by this method. The structure of soils, including these factors (for example, the chemical bonding) that indeed cause the change of the structure of soils, is quantitatively described by the structural parameter. The effects of overconsolidation, secondary consolidation and desiccation are quantitatively described by the overconsolidation parameter together for their identical effects on the mechanical characteristics of soils.