You can't just 'dismantle' a plant that still has residual heat being generated.
Additionally, if you're suggesting burying it in reference to the solution at Chernoby, that also doesn't work so well. At Chernobyl the plant was effectively destroyed, so there was no harm in simply filling it with concrete and placing the sarcophagus over it. At Fukushima the plant is still largely intact. Unless you can submerge the plant in concrete in one fell swoop (not possible), the damage done by the piecemeal burying of the plant would undoubtedly create even more damage and result in more radiation leakage than we currently see.
Additionally, if you're suggesting burying it in reference to the solution at Chernoby, that also doesn't work so well. At Chernobyl the plant was effectively destroyed, so there was no harm in simply filling it with concrete and placing the sarcophagus over it. At Fukushima the plant is still largely intact. Unless you can submerge the plant in concrete in one fell swoop (not possible), the damage done by the piecemeal burying of the plant would undoubtedly create even more damage and result in more radiation leakage than we currently see.