scholarly journals The Performance of a Prefaricated Vertical Drains Trails Embankments

2011 ◽  
Vol 72 (3) ◽  
Author(s):  
Chin Chong
Keyword(s):  
Deformation Behavior ◽  
Full Scale ◽  
The Other ◽  
Marine Clay ◽  
Prefabricated Vertical Drains ◽  
Vertical Drains

The full scale trail embankments were constructed to a height of 3.65m over the soft marine clay at Juru, Butterworth,Pulau Pinang. One of the embankments was improved using prefabricated vertical drains (PVD),and the other one without treatment was control embankments. Monitoring instruments such as hydrostatic  profile gauges, settlement gauges ,inclino,eters and piezometers were installed in the subsoil to observe the deformation behavior of the embankments under loadings.

scholarly journals Preloading system with partially penetrating vertical drains in marine soft clays in Egypt: 2D and 3D comparative FE study

2021 ◽  
Vol 13 (3) ◽  
pp. 10-22
Author(s):  
Ahmed M. Abouhashem ◽  
Alaa El-Din A. El-Gendy ◽  
Mohamed H. Rabie ◽  
Mohamed A. Mostafa
Keyword(s):  
Large Scale ◽  
Three Dimensional ◽  
Vertical Displacement ◽  
Design Parameters ◽  
Marine Clay ◽  
Prefabricated Vertical Drains ◽  
Vertical Drains ◽  
Soft Clays ◽  
Clay Deposits ◽  
Three Dimensional Finite Element

A large-scale trial embankment provided with partially penetrating prefabricated vertical drains (PVD) was installed in consolidating marine clay deposits at East-Port said industrial zone project in Egypt. The trial embankment was constructed with a bottom area of 150x150m and a height of 5.5m to evaluate the efficiency of the improvement system and verify the design parameters. An intensive instrumentation system was built-up including shallow settlement indicators, vibrating wire piezometers, extensometer, and inclinometers. Two and three-dimensional finite element analyses (FE) were performed to study the effect of the preloading system provided with partially PVD in consolidating marine clay deposits. FE models were validated and showed good agreement with the field observations in terms of vertical displacement of embankment center, and lateral soil deformation beneath the embankment toe.

Full scale consolidation test on ultra-soft soil improved by prefabricated vertical drains in MAE MOH mine, Thailand

2021 ◽  
Vol 49 (1) ◽  
pp. 72-80
Author(s):  
Dong Huy Ngo ◽  
Suksun Horpibulsuk ◽  
Apichat Suddeepong ◽  
Wisanukorn Samingthong ◽  
Artit Udomchai ◽  
...  
Keyword(s):  
Soft Soil ◽  
Full Scale ◽  
Prefabricated Vertical Drains ◽  
Vertical Drains ◽  
Consolidation Test ◽  
Mae Moh

Evaluation of the Effectiveness of Prefabricated Vertical Drains Using Full-Scale In Situ Staged Dynamic Testing

2010 ◽  
Author(s):  
Antonio Marinucci ◽  
Ellen M. Rathje ◽  
J. Scott Ellington ◽  
Brady R. Cox ◽  
Farn-Yuh Menq ◽  
...  
Keyword(s):  
Dynamic Testing ◽  
Full Scale ◽  
Prefabricated Vertical Drains ◽  
Vertical Drains

scholarly journals Prefabricated vertical drains (PVDs) in soft Bangkok clay: a case study of the new Bangkok International Airport project

2002 ◽  
Vol 39 (2) ◽  
pp. 304-315 ◽  
Author(s):  
Dennes T Bergado ◽  
A S Balasubramaniam ◽  
R Jonathan Fannin ◽  
Robert D Holtz
Keyword(s):  
Soft Clay ◽  
Field Measurements ◽  
Full Scale ◽  
Maximum Height ◽  
Vertical Movements ◽  
Prefabricated Vertical Drains ◽  
Vertical Drains ◽  
International Airport ◽  
Prefabricated Vertical Drain ◽  
Test Embankment

This paper presents the performance of a full-scale test embankment constructed on soft Bangkok clay with prefabricated vertical drains (PVDs) at the site of the new Bangkok International Airport in Thailand. The embankment was square in plan with a maximum height of 4.2 m, 3H:1V side slopes, and base dimensions of 40 m by 40 m. The piezometric level with depth is characterized by negative drawdown starting at around 8-10 m depth caused by excessive withdrawal of groundwater. Instrumentation was provided to monitor both horizontal and vertical movements of the test embankment. The measured increases in undrained shear strengths with depth are in agreement with the values calculated from the SHANSEP technique. The secondary compression ratio, Cα, was 0.018, or within the normal values for marine clays. The coefficient of horizontal consolidation measured in the field, Ch(field), was higher for soil at 4 and 10 m depths than for the weakest soil at 6 m depth. The back-calculated Ch(field) values range from 3 to 8 m2/year, and the ratio of Ch(field) to Ch(lab) ranges from 4 to 5, where Ch(lab) is the coefficient of horizontal consolidation measured in the laboratory. The degree of consolidation estimated from the pore-pressure dissipation measurements agreed with those obtained from settlement measurements. The water-content reductions from field measurements were also in good agreement with the values computed from the consolidation settlements. The full-scale study confirmed that the magnitudes of consolidation settlements increased with the corresponding decrease of PVD spacing at a particular time period. Lastly, the results of the full-scale study have proven the effectiveness of PVDs for the improvement of soft Bangkok clay.Key words: soft clay, consolidation, prefabricated vertical drain, preloading, test embankment.

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