| 摘要 |
It is disclosed herein a prefabricated manhole shaft made of polyethylene and reinforced concrete. It can be constructed in 3 types (with one, two or three pieces) of two variants each. The said nanhole excels in the restriction of the time needed for its construction made in situ as well as in the restriction of the volume of excavations and pumpings. The construction in question is able to undergo the charges of traffic. |
