结构性土体固结压力的力学效应

发布时间：2018-02-19 18:41

本文关键词： 特殊土体结构性结构强度前期固结压力力学效应　出处：《西南交通大学学报》2016年05期 　论文类型：期刊论文

【摘要】：针对黄土、盐渍土、红土、下蜀土、软土以及添加水泥和石灰固化后的吹填土等特殊土体表现为结构强度高、先期固结压力大,且地表土超固结比十分高,存在随着土层深度的增加,前期固结压力值减小的反常规现象,开展了土体结构力、结构强度和结构性土体等一系列问题的研究.通过对大量试验资料的分析,讨论了影响土体前期固结压力的主要影响因素,包括土体胶结类型、成因特点、原岩结构以及环境等因素;根据原状土和重塑土的W'缩曲线半定量地确定结构强度值;并探讨了结构力的形成机制.研究结果表明:土体结构强度受到影响则导致土体前期固结压力发生改变;前期固结压力实质上是由传统定义上的前期固结压力与结构强度两部分构成;结构力即为颗粒之间形成的固化胶结连结力.最后给出了结构强度和结构性土的定义.
[Abstract]:In view of the special soil mass such as loess, saline soil, red soil, Xiashu soil, soft soil, cement and lime solidified blow fill soil and other special soil mass, such as high structural strength, high pre-consolidation pressure, and high overconsolidation ratio of topsoil, There is an unconventional phenomenon that the consolidation pressure decreases with the increase of soil depth. A series of problems, such as soil structural force, structural strength and structural soil mass, are studied. The main factors affecting the pre-consolidation pressure of soil are discussed, including soil cementation type, genetic characteristics, original rock structure and environment, etc. The structural strength is determined semi-quantitatively according to the W'shrinkage curve of undisturbed soil and remolded soil. The formation mechanism of structural force is discussed. The results show that the influence of soil structural strength will result in the change of consolidation pressure in the early stage of soil. The pre-consolidation pressure is essentially composed of two parts: the pre-consolidation pressure and the structural strength in the traditional definition; the structural force is the solidified bonding force formed between the particles. Finally, the definitions of the structural strength and the structural soil are given.
【作者单位】：吉林大学建设工程学院;吉林大学应用技术学院;
【基金】：国家自然科学基金资助项目(41430642,41372267)
【分类号】：TU41

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