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A method of determining nonlinear large strain consolidation parameters of dredged clays
  • 期刊名称:Water Science and Engineering
  • 时间:2014
  • 页码:218-226
  • 分类:TU411.5[建筑科学—岩土工程;建筑科学—土工工程] TU43[建筑科学—岩土工程;建筑科学—土工工程]
  • 作者机构:[1]Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, P.R.China, [2] Municipal Facilities Authority, Weifang Economic Development Zone, Weifang 261057, P.R.China
  • 相关基金:This work was supported by the Innovation Program for 2011 College Graduates of Jiangsu Province (Grant No. CXZZ__0158) and the National Natural Science Foundation of China (Grant No. 51178107).
  • 相关项目:高含水率疏浚淤泥材料非线性变化规律与大变形固结模型研究
中文摘要:

就起始的水内容的影响而言获得挖出的泥土的大紧张巩固参数的一个方法在这研究被调查。根据有高起始的水的 remolded 泥土的测试结果,内容由 hong 等报导了。(2010 ) ,在空比率(e) 之间的一种关系和有效压力(') 被建立。而且基于从文学的可得到的渗透数据,在渗透系数(k) 和比率之间的一种新关系(e/e 到在液体限制的空比率的空比率的 L )(e L ) 被建议。就起始的水内容而言的新建议表示改进 Nagaraj 等建立的 e−k 方程。(1994 ) 。最后,起始的空比率的影响和大种类巩固系数 g (e) 上的有效应力由吉布森等定义。(1981 ) 并且在大种类分析的 k/(1+e ) 被讨论。结果证明在一个经常的有效压力下面, k/(1+e ) 的价值与起始的空比率增加。大种类巩固系数看分割变化的法律,它随有效压力的增加减少有效压力是什么时候不到 remolded 收益压力,而是增加当有效压力比 remolded 大时,很快与有效压力产出应力。

英文摘要:

A method of obtaining the large strain consolidation parameters of dredged clays considering the influence of the initial water content is investigated in this study. According to the test results of remolded clays with high initial water contents reported by Hong et al. (2010), a relationship between the void ratio (e) and effective stress (a3 is established. Furthermore, based on the available permeability data from the literature, a new relationship between the permeability coefficient (k) and the ratio (e/eL) of the void ratio to the void ratio at the liquid limit (eL) is proposed. The new proposed expression considering the initial water content improves the e-k equation established by Nagaraj et al. (1994). Finally, the influence of the initial void ratio and effective stress on the large strain consolidation coefficient g(e) defined by Gibson et al. (1981) and k/(1 +e) in large strain analysis is discussed. The results show that, under a constant effective stress, the value of k/(1 +e) increases with the initial void ratio. The large strain consolidation coefficient shows the law of segmentation change, which decreases with the increase of the effective stress when the effective stress is less than the remolded yield stress, but increases rapidly with the effective stress when the effective stress is larger than the remolded yield stress.

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