Numerical model of soft ground improvement by vertical drain combined with vacuum preloading

2013 ◽  
Vol 20 (7) ◽  
pp. 2066-2071 ◽  
Author(s):  
Hui Wu ◽  
Li-ming Hu
Keyword(s):  
Numerical Model ◽  
Ground Improvement ◽  
Soft Ground ◽  
Vacuum Preloading ◽  
Vertical Drain ◽  
Soft Ground Improvement

Influence of Bending of Plastic Vertical Drain on Consolidation via Vacuum Preloading

2014 ◽  
Vol 644-650 ◽  
pp. 4826-4830
Author(s):  
Bin Bin Xu ◽  
Shotaro Yamada ◽  
Toshihiro Noda
Keyword(s):  
Ground Improvement ◽  
Ground Surface ◽  
Soft Ground ◽  
Finite Element Analyses ◽  
Vacuum Preloading ◽  
Vertical Drains ◽  
Bending Effect ◽  
Vertical Drain ◽  
Drainage Capacity ◽  
Soft Ground Improvement

The soft ground improvement employing vacuum preloading is widely used in Tianjin. In the application of vacuum preloading, the bending of plastic vertical drains (PVDs) often occurs accompanying the large settlement of the soft ground or the significant shear strain at the ground surface. In order to investigate the influence of bending of PVDs on the ground consolidation, three different bending shapes of PVDs are assumed and a series soil-water coupled finite element analyses are carried out. It is found that: 1) the macro-element method is available to take the bending effect of PVDs into consideration; 2) the bending at the bottom of PVDs has much impact on the consolidation of ground even though the hydraulic gradient at the bottom is much smaller than that at the top; 3) Due to the bending of PVDs at the bottom the drainage capacity is much influenced and the volumetric compression only occurs at the first few layers of the ground.

scholarly journals A New Combined Vacuum Preloading with Pneumatic Fracturing Method for Soft Ground Improvement

2016 ◽  
Vol 143 ◽  
pp. 454-461 ◽  
Author(s):  
Liu Songyu ◽  
Zhang Dingwen ◽  
Du Guangyin ◽  
Han Wenjun
Keyword(s):  
Ground Improvement ◽  
Soft Ground ◽  
Vacuum Preloading ◽  
Soft Ground Improvement

A new method of combination of electroosmosis, vacuum and surcharge preloading for soft ground improvement

2014 ◽  
Vol 28 (4) ◽  
pp. 511-528 ◽  
Author(s):  
Han-long Liu ◽  
Yun-liang Cui ◽  
Yang Shen ◽  
Xuan-ming Ding
Keyword(s):  
Ground Improvement ◽  
New Method ◽  
Soft Ground ◽  
Surcharge Preloading ◽  
Soft Ground Improvement
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