And through comparing them,it decides the construction of using discontinuous arranging piles inner supporting and semi-inverse method,introduces the construction process and points of molten iron pouring,and points out that the program shortens the time limit of the project,and decreases the costs,and it values to prompting and application.

In the design and construction of super foundation pits,the semi-reversed construction method is economical and effective.

The half against method construction organizes and the quantity supervises and control;

By means of the basic theory of plane problem in elastic mechanics and by using semi-inverse solving method,the stresses and displacements of the beams fixed at both sides under the concentrated load are calculated.