Alternative Title
Paper No. 9.01
Location
St. Louis, Missouri
Date
12 Mar 1998, 10:30 am - 12:00 pm
Abstract
The effects of anisotropy and sample disturbance on the consolidation parameters were investigated through laboratory testing, and the degree of sample disturbance on the consolidation parameters in the periphery of the drain is evaluated. A new method for settlement analysis, taking into consideration both sample disturbance and the retardation of the consolidation in the ground improved by vertical drain, is proposed. The effects of anisotropy and sample disturbance on the consolidation parameters in the ground improved by vertical drain are given as the function of the distance from the boundary of drain. In the undisturbed zone, the ratio of the coefficient of consolidation of the horizontal to the vertical is about 1.70, and in the completely remolded soil at the periphery of the drain, about 0.50. A new method for settlement analysis, taking into consolidation both anisotropy and disturbance in the ground improved by vertical drain, is proposed. For the marine and the continental day deposits in Japan, the accuracy of the prediction of the consolidation settlement by the proposed method under the degree of consolidation U=80% are (7~20)% for the marine clay deposits and (3~20)% for the continental clay deposits.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
4th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1998 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Shogaki, Takaharu; Moro, Hayato; and Matsuo, Minoru, "Case Histories for Settlement Analysis in Ground Improved by Vertical Drain" (1998). International Conference on Case Histories in Geotechnical Engineering. 1.
https://scholarsmine.mst.edu/icchge/4icchge/4icchge-session09/1
Case Histories for Settlement Analysis in Ground Improved by Vertical Drain
St. Louis, Missouri
The effects of anisotropy and sample disturbance on the consolidation parameters were investigated through laboratory testing, and the degree of sample disturbance on the consolidation parameters in the periphery of the drain is evaluated. A new method for settlement analysis, taking into consideration both sample disturbance and the retardation of the consolidation in the ground improved by vertical drain, is proposed. The effects of anisotropy and sample disturbance on the consolidation parameters in the ground improved by vertical drain are given as the function of the distance from the boundary of drain. In the undisturbed zone, the ratio of the coefficient of consolidation of the horizontal to the vertical is about 1.70, and in the completely remolded soil at the periphery of the drain, about 0.50. A new method for settlement analysis, taking into consolidation both anisotropy and disturbance in the ground improved by vertical drain, is proposed. For the marine and the continental day deposits in Japan, the accuracy of the prediction of the consolidation settlement by the proposed method under the degree of consolidation U=80% are (7~20)% for the marine clay deposits and (3~20)% for the continental clay deposits.
