摘要
为探究平板尺寸效应影响,分析了浅层平板载荷试验中对不同土体地基承载力特征值、承载力检测厚度、变形参数检测厚度的影响。研究表明,地基承载力特征值随平板宽度b的增大而增大,砂土承载力特征值对b的变化敏感,塑限较小且孔隙较大的黏性土承载力特征值对b较敏感,塑限较大的黏性土承载力特征值对b不敏感。承载力检测深度范围为0.6~2.0 b,内摩擦角大时取大值,方板变形参数检测厚度约为2 b。研究结果可为认识平板尺寸效应影响及合理选择平板尺寸提供参考。
In order to study and analyze the influence of plate size effect,the study analyzes the influence of the size of shallow plate load test plate on the bearing capacity eigenvalue,bearing capacity detection thickness,and deformation parameter detection thickness of different soil foundations.The study shows that the characteristic value of foundation bearing capacity increases with the plate width b,and the characteristic value of sand bearing capacity is sensitive to the change of b;the characteristic value of bearing capacity of cohesive soil with large void ratio is sensitive to B,while that of cohesive soil with large plastic limit is insensitive to b.The range of bearing capacity detection depth is 0.6~2.0b,and the maximum value shall be taken when the internal friction angle is large;the measured thickness of square plate deformation parameter is about 2b.This provides reference for understanding the influence of plate size effect and rational selection of plate size.
作者
杨益成
Yang Yicheng(Shaoyang Construction Engineering Quality Inspection Center,Shaoyang 422000,China)
出处
《黑龙江科学》
2023年第6期52-55,59,共5页
Heilongjiang Science
关键词
平板载荷试验
浅层
尺寸
Plate load test
Shallow layer
Size
