| 摘要 |
PURPOSE: A manhole assembly is provided to prevent the floating of a manhole block main body due to external pressure by installing a pressure dispersion part in the main body. CONSTITUTION: A manhole assembly comprises a manhole block main body(100) and a pressure dispersion part(200). The manhole block main body is buried in the ground. The manhole block main body comprises a lower manhole block, a soft manhole block and an upper manhole block. The upper manhole block is combined on the top of the soft manhole block. The pressure dispersion part is selectively installable in the lower manhole block, soft manhole block or upper manhole block in order to prevent the floating of the main body. |
