Hydrofracturing enhancement

When unsaturated soil is fractured, the stress of the injected fluid is adsorbed by the soil in either of two scenarios. Either the surrounding soil is compressed or the surrounding soil maintains its integrity and conveys the energy to the surface where heaves develop. In unconsolidated soil with relatively low shear strength, the 

Pneumatic or hydraulic fracturing can occasionally be used to enhance the effective porosity (permeability) of unsaturated zones for SVE or air sparging. Successful soil fracturing is as much an art as a science. Pilot testing by experienced professionals is strongly recommended before performance guarantees are granted. 

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Other technologies that have been used under certain conditions include vacuum vaporization, hydrofracturing enhancement, electrochemical, and vitrification and electric heating techniques. 

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