We always called it army sword, or sometimes horse cutting sword; jian we called straight sword. Searching for pu dao brings up the most similar weapon to what I had (sadly I had to get rid of both my army sword and straight sword a few years ago after a cross country move). The rationale, I was told, for the crawling on the ground bit was you had like killed a horse, and it fell on you, and you were crawling out from underneath the corpse?
Whatever name I search under, I can find two different forms. A wushu form that is very different from what I knew, and the one above which is similar in style but lacks certain moves that I remember.