My invention relates to military engineering. More specifically, it concerns obstacles and barriers designed to halt or delay the advance of hostile military forces. My invention is designed primarily to stop or impede tanks and other armored vehicles, but it also incorporates antipersonnel features. Its main advantage lies in that it is especially suited for construction in peacetime since it requires very little maintenance, poses no danger to inhabitants and negligible inconvenience to normal peacetime movement or economic use of real estate in the area in which employed. It is designed to be quickly converted into an obstacle which is superior to types currently in use or planned.