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Post Code: 226533
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Contacts: Jennifer Zhang
Email: sales@hanovo.com.cn

Geocomposite In Embankments On Soft Soils

Jiangsu Hanovo New Material Co.,Ltd | Updated: Sep 18, 2017


The construction of embankments on soft soils can be a challenging task. In this context, the use of geocomposite to improve embankment stability is one of the most effectives and well-tried forms of the soil reinforcement technique. 


geogrid .jpg      


Typical unreinforced embankment failure and uses of geosynthetics as reinforcement. In such problems, geosynthetics can be effectively used to

1) Reduce soft soils displacements due to low bearing capacity of soft soils;

图片1.png 

2) Prevent overall failure of the embankment and soft foundation soil;

图片2.png 

3) Prevent sliding failure along the geosynthetics surface.

图片3.png 

 

The stability level of a reinforced embankment on soft soil can be evaluated by the definition of safety factors (Fs):

 • For overall stability                     

图片4.png 

 

where MD: soil driving moment

MR: soil resisting moment

∆MR: geosynthetic moment contribution against failure

• For stability against sliding failure

                                图片5.png

 

PA: active thrust from the fill (from active earth pressures)

PR: friction force along the fill-reinforcement interface

The efficiency of geosynthetics as reinforcements of embankments on soft soils can be visualized by the following figures.

图片6.png 

 

In case of limited reinforcement effect, the so called “basal reinforced piled embankment” can be used. Prefabricated piles or improved soil piles can be employed.

 

图片7.png 

If draining materials are used, geosynthetics can be properly specified to contribute to the acceleration of settlements due to soft soil consolidation.