In the latest years, prefabricated concrete inspective manholes by right of their predominance were used in our engineering of city planning more and more, but the analysis and study about them just on the first step.

Finally a simple and precise criterion for concrete shaft lining failure is established on the basis of test data.

ased on the researches of model tests of concrete shaftlining under non-homogeneous lateral pressure,the resultS were presented in the current designing that considerable wellbearing capacity was obtained and the tensile stresses were eradicates in the frozen shaftlining.

A finite element program is worked out for the concrete shaftlining under non-homogeneous lateral pressure, it is applied to calculate the concrete shaftlining, the results are presented in the current designing that considerable well bearing capacity is obtained and the tensile stress is eradicated in the frozen shaftlining.

2 Dock of NANTONG COSCO KHI SHIPYARD,the dewatering of concrete pipe well is introduced to lower the water content in the soil through tryout of pumping water before the soil is typically excavated.

In the course of excavating and constructing the underwater bridge foundation of Hangzhou Canal Bridge,the steel reinforced concrete sunk well is used as the enclosure method.