Surely securing a device such as this wouldn't be the hardest part? Just dig a really hole in the middle of the base, drop it in there and cover it with either

Surely securing a device such as this wouldn't be the hardest part? Just dig a really hole in the middle of the base, drop it in there and cover it with either dirt or cememnt, leaving a small shaft for maintanance/access. Then dig it out again at the end? That would protect it from everything other than the entire base being completely overrun, in which case the enemy has already won right?