摘要
提出了一种新的地基处理方法——将含高比例膨胀组分的固化剂与土拌和后密实填充在工程塑料长筒内,形成约束固化土桩。为探讨这种技术的可行性,对约束成型的固化土进行立方体抗压强度试验、对约束固化土短柱进行轴压试验。结果表明:采用含高比例膨胀组分的固化剂分别与最佳含水量的可塑态土和高含水量的流塑态土拌和制备的约束固化土,可以获得比无约束成型土更高的强度;固化土强度相等时,与无约束固化土短柱相比,约束固化土短柱的承载能力可以大幅度提高,而且在破坏时有很大的塑性变形;约束体必须有较高的约束刚度,才能有效地提高固化土的承载力、获得较大的塑性变形。
A new foundation treatment method was proposed that a curing agent,which was with high proportion expansive component,was mixed with soil thoroughly,then the mixture was filled into engineering plastic tube and buried in the foundation to form a confined solidified soil pile. In order to explore the feasibility of that technique,cube compressive strength test was carried out for the solidified soil molded with confined condition,and the axial compression test was carried out for confined solidified soil short column. The results showed that the solidified soil molded with confine could get more strength than that molded without confine; for the solidified soil made of plastic state soil with optimum water content and plastic flow state soil with high water content,when the solidified soil with same strength,as compared with solidified soil short column without confine,the confined solidified soil short columns were of great bearing capacity and higher plastic deformation capacity during damage; and the confined body should possess enough confine stiffness to effectively improve the bearing capacity of the solidified soil and to achieve large plastic deformation during damage.
出处
《工业建筑》
CSCD
北大核心
2017年第3期111-116,共6页
Industrial Construction
基金
国家自然科学基金项目(5157081390)
关键词
约束固化土
约束刚度
密度
破坏形态
承载力
confined solidified soil
confine stiffness
density
failure mode
bearing capacity
