PURPOSE: A double layer pipe is provided to make a dead body safely decompose without influence by surrounding conditions of a coffin by protecting the dead body from water gathered under the coffin and preventing underground worms from entering the inside of the coffin. CONSTITUTION: A double layer pipe includes an upper layer and a lower layer. The upper layer has an upper layer net structure(4) mounted at a central height of the inside of the pipe, a chemical fiber fabric(3) bonded on the upper layer net structure, and soil(2) put on the chemical fiber fabric. The lower layer has a lower layer net structure(6) mounted at a lower portion of the inside of the pipe and the chemical fiber fabric bonded on net holes of both edge portions of the lower layer net structure. A triangular stand(5) for reducing the number of holes of the lower layer net structure is mounted on the lower layer net structure.
展开▼
