Method for calculating horizontal drain induced non-linear and large strain degree of consolidation
Method for calculating horizontal drain induced non-linear and large strain degree of consolidation
复制标题
水平排水引起的非线性大应变固结度计算方法
DOI：
10.1016/j.geotexmem.2021.09.008
复制
发表时间：
2021-09
影响因子：
5.2
通讯作者：
Yafei Qiao
中科院分区：
文献类型：
--
作者：
Jinchun Chai;Jun Wang;Wenqi Ding;Yafei Qiao
采用真空压力和预制水平排水管相结合的方法加固疏浚粘土浆料在实践中得到了广泛的应用。这是一个大应变问题，但目前还没有大应变理论来解释PHD诱导固结。提出了一种同时考虑力学非线性和几何非线性的显式方程方法。该方法利用虚时间概念考虑性质的逐步变化。虚时间是由变形前后固结度的连续性条件决定的。并将该方法应用于真空固结大比例尺模型试验分析。进行了两项分析。一个考虑了力学和几何非线性（大应变），另一个只考虑力学非线性（小应变）。大应变分析结果与实测沉降曲线和超孔隙压力吻合较好。而小应变分析则明显低估了固结速率。研究结果表明，考虑大应变的影响是分析黏性水泥浆PHD诱发固结的重要因素，该方法可作为一种有用的设计工具。•考虑力学和几何非线性的显式固结解决方案。•PHD真空固结的大型模型试验。•证明在固结分析中考虑大应变现象的重要性。
Consolidating dredged clay slurries using a combination of vacuum pressure and prefabricated horizontal drains (PHDs) is widely used in practice. This is a large strain problem, but there is no existing large strain theory for PHD induced consolidation. A method with explicit equations has been proposed to consider both mechanical and geometrical non-linearities in analyzing PHD induced consolidation. The method considers stepwise variation of properties using imaginary time concept. An imaginary time is determined by the condition of continuity of degree of consolidation before and after changing the properties. Then the method was applied to analyze a large scale model test of vacuum consolidation with PHD. Two analyses were conducted. One considered both the mechanical and geometrical non-linearity (large strain), and another only considered mechanical non-linearity (small strain). The results of large strain analysis agree with the measured settlement curve and excess pore pressures well. While the small strain analysis under-estimated the rate of consolidation significantly. The results from this study indicate that for analyzing PHD induced consolidation of clay slurries considering the effect of large strain is important, and the proposed method can be a useful design tool. • An explicit consolidation solution considering both mechanical and geometrical non-linearities. • A large scale model test of vacuum consolidation with PHD. • Demonstrating the importance of considering large strain phenomenon in consolidation analysis.
登录
查看更多内容
影响因子：
5.8
作者：
C. Hird;I. Pyrah;D. Russell
通讯作者：
C. Hird;I. Pyrah;D. Russell
影响因子：
3.7
作者：
J. Chai;Yang Zhou
通讯作者：
J. Chai;Yang Zhou
影响因子：
--
作者：
J. Chu;M. W. Bo;A. Arulrajah
通讯作者：
J. Chu;M. W. Bo;A. Arulrajah
影响因子：
5.2
作者：
Xu Binhua;Ning He;Jiang Yanbin;Zhou Yanzhang;Xinjie Zhan
通讯作者：
Xu Binhua;Ning He;Jiang Yanbin;Zhou Yanzhang;Xinjie Zhan
影响因子：
4.5
作者：
W. Guo;J. Chu;B. Zhou
通讯作者：
W. Guo;J. Chu;B. Zhou