manhole comprise changeable main-parts according to connecting pipe

摘要

The present invention relates to a manhole with a body unit variable in accordance with a pipe to be connected. The body unit of the manhole is formed by assembling a plurality of unit body members and a plurality of pipe connection members. The unit body members are classified into a curved unit body member forming an arc and a planar unit body member forming a plane and a straight line. Each of the unit body members is composed of a rectangular plate and a joint flange case protruding from an edge of the plate and formed into a cylindrical structure. The pipe connection member comprises a joint flange case of a cylindrical structure corresponding to that of the joint flange case of the unit body member. The pipe to be connected is connected inside the pipe connection member. Accordingly, the body unit is capable of being assembled to a size and in a form proper to a construction site. Additionally, the body unit is variable in accordance with the pipe added, removed, and changed after construction.