摘要
在侧限高压固结仪上,对3种软土进行了不同固结压力、不同加荷比下的一维固结试验。试验结果表明:保持加荷比为1进行加荷时,次固结系数随固结压力的增大呈先增大后减小的趋势;加荷比定量,次固结系数较小;加荷比对主、次固结界限的划分有影响;次固结系数与压缩指数的比值,在减小加荷比加载时有所减小。在对试验数据进行分析的基础上,提出一个次固结系数与固结压力的函数关系,可由已知数据推求其他荷载下的次固结系数,并采用其他学者的试验结果对该函数关系进行了验证。
Based on a series of 1-D consolidation tests for three types of soft soils, the influence of consolidation pressure p and load ratio △p/p on behavior of secondary consolidation was investigated. The results of tests show that under the condition of △p/p = 1, along with the increasing consolidation pressure p, the secondary consolidation ratio C increases to a peak value at first and then reduces gradually. The △p/p has some effect on C. The difference of primary consolidation and secondary consolidation is related to △p/p. The ratio of C to compression index Co is affected by △p/p in a certain degree. A functional relationship between C and p is proposed based on the test data, by which the secondary consolidation C of arbitrary loading step can be calculated. This relationship is verified by the test data of other researchers.
出处
《水利学报》
EI
CSCD
北大核心
2009年第5期583-588,共6页
Journal of Hydraulic Engineering
关键词
软土
土工试验
次固结系数
固结压力
加荷比
soft soil
secondary consolidation
consolidation pressure
load ratio
secondary consolidation ratio
