摘要
通过疏浚泥双层地基室内模型试验,研究固化疏浚泥双层地基在不同上部硬土层厚度、固化剂掺入比、压缩模量及宽厚比(上部硬土层厚度与基础宽度的比值)以及基础尺寸条件下的承载性能及其变形特性。利用第二拐点法及双切线法综合确定疏浚泥双层地基极限承载力。研究表明其他条件不变的情况下,固化疏浚泥双层地基随着上部硬土层的厚度、固化剂掺入比、宽厚比及压缩模量的增长地基承载力均有较大提高,同时,条形基础作用下的双层地基承载力比方形基础作用下增加幅度大。有效解决了工程应用中各项参数的选择问题。
Dimensional analysis was used to establish a reasonable test model ,with which the bearing capacity of the double-layered foundation with upper solidified dredging sludge and its deformation characteristics in different conditions were investigated .The thickness of the upper solidified dredging sludge ,curing agent content ,compression modulus and width-to-thickness ratio （the ratio of the thickness of the upper solidified dredging sludge layer and the width of the base ）and the original state of the foundation were considered in the laboratory model tests .The ultimate bearing capacity of this foundation was determined by using second inflection point method and double tangent method .The study indicates that when other factors remain unchanged ,the bearing capacity will be enhanced greatly by the increase of the upper lay-er thickness ,curing agent content and width-to-thickness ratio .Compared to the square base ,the bearing capacity of double-layered foundation under the action of the strip base rises by an excessive growth .This can effectively save the problems of parameter selection in practical engineening .
出处
《水利与建筑工程学报》
2015年第5期65-71,145,共8页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金(51078228)
国家海洋公益性行业科研专项经费项目(201105024-5)
关键词
双层地基
疏浚泥
室内模型试验
承载性能
double-layered foundation
dredging sludge
laboratory model test
bearing capacity
