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变荷载下基于指数渗流一维固结半解析解
  • 期刊名称:浙江大学学报(工学版),2012. (EI刊物, 录用待刊)
  • 时间:0
  • 分类:TU470[建筑科学—结构工程;建筑科学—土工工程]
  • 作者机构:[1]浙江大学软弱土与环境土工教育部重点实验室,浙江杭州310027, [2]江苏大学土木工程系,江苏镇江212013
  • 相关基金:国家自然科学基金资助项目(50878191,51109092)
  • 相关项目:基于非达西渗流定律的软土固结理论研究
中文摘要:

考虑实际工程中的变荷载,对基于指数形式渗流定律的一维固结问题进行计算分析.通过采用数值离散与成层地基线性固结解析解相结合的半解析方法得到一系列的固结曲线.分析仅在某一参数发生变化时的一维固结性状.结果表明:固结速率在固结初期随渗流指数的增加而增加,在固结后期随渗流指数的增加而减少;当指数〈1时,作用在地基上的荷载越大则固结速率越小;当指数〉1时,荷载越大固结速率越大;无论渗流指数为何值,在相同的固结时间下,地基平均固结度都会随着地基土层厚度的增加而减小;固结速率随着加荷速率的增加而变快.

英文摘要:

One-dimensional consolidation with exponential flow was analyzed considering time-dependent loading in actual engineering.A series of consolidation curves were obtained by means of semi-analytical method combining numerical discretization with analytical solutions for consolidation of layered soil.Consolidation behavior was analyzed under change of a certain parameter.Results show that consolidation rate increases with increasing the exponent during early stage of consolidation and decreases with increasing the exponent during later stage of consolidation.If the exponent is less than 1,the larger the loading is,the slower consolidation rate is;if the exponent is greater than 1,the larger the loading is,the faster consolidation rate is.Whatever the value of exponent is,the average consolidation degree decreases with increasing thickness of soil layer at the same consolidation time;the consolidation rate accelerates with increasing loading rate.

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