Consolidation theory for prefabricated vertical drain assuming elliptic cross section and nonlinear well resistance

被引：0

作者：

Huang C. ^{[1
]}

Deng Y. ^{[2
]}

Hu G. ^{[3
]}

机构：

[1] Zhejiang Design Institute of Water Conservancy and Hydroelectric Power, Hangzhou, 310002, Zhejiang

[2] Institute of Geotechnical Engineering, Ningbo University, Ningbo, 315211, Zhejiang

[3] Cold and Arid Regions Environmental and Engineer Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, Gansu

来源：

Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2017年 / 36卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Analytical solution; Confocal elliptical coordinate; Consolidation theory; Ground foundation; Nonlinear well resistance; Prefabricated vertical drain(PVD);

D O I：

10.13722/j.cnki.jrme.2015.1746

中图分类号：

学科分类号：

摘要：

The consolidation process for foundations with prefabricated vertical drain(PVD) of plate shape is normally analysed with the assumption of the vertical drain to be circular in cross section with equivalent area. Such simplification leads to the discrepancy between the assumed and actual shapes. In this paper, the cross section of PVD was assumed as an elliptic shape which is close to the plate shape. The basic equations of consolidation for the vertical drain under the elliptic cylindrical coordinate system were presented and the degree of consolidation was then obtained. Comparisons between the new and traditional solutions were conducted and discussed. The traditional methods were found to overestimate the drainage effects of PVD. The drainage coefficient of permeability decreases linearly with depth and exponentially with time. The larger well resistance leads to the slower consolidation and even to serious clogging of the drainage board. © 2017, Science Press. All right reserved.

引用

页码：725 / 735

页数：10

共 21 条

[1] Barron R.A., Consolidation of fine-grained soils by drain wells, Transaction of the American Society of Civil Engineers, 113, 1, pp. 718-754, (1948)
[2] Yoshikuni H., Nakanodo H., Consolidation of soils by vertical drain wells with finite permeability, Soils and Foundations, 14, 2, pp. 35-46, (1974)
[3] Hansbo S., Consolidation of clay by band-shaped prefabricated vertical drains, Ground Engineering, 12, 5, pp. 16-18, (1979)
[4] Onoue A., Consolidation by vertical drains taking well resistance and smear into consideration, Soils and Foundations, 28, 4, pp. 165-174, (1988)
[5] Xie K., Zeng G., Consolidation theories for drain wells under equal strain condition, Chinese Journal of Geotechnical Engineering, 11, 2, pp. 3-17, (1989)
[6] Zeng G.X., Xie K.H., New development of the vertical drain theories, Proceedings of the 10th International Conferences on Soil Mechanics and Foundation Engineering, pp. 1435-1438, (1989)
[7] Hansbo S., Consolidation of fine-grained soils by prefabricated drains, Proceedings of the 10th International Conferences on Soil Mechanics and Foundation Engineering, pp. 677-682, (1981)
[8] Fellenius B.H., Castonguay N.G., The Efficiency of Band Shaped Drains: A Full Scale Laboratory Study, (1985)
[9] Atkinson M.S., Eldred P.J.L., Consolidation of soil using vertical drains, Géotechnique, 31, 1, pp. 33-43, (1981)
[10] Long R., Covo A., Equivalent diameter of vertical drains with oblong cross section, Journal of Geotechnical Engineering, 120, 9, pp. 1625-1630, (1994)

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