In this paper,the short hole crater reaming and undercutting two steps method,which is formed bottom structure in short shrinkage method,is changed into one step that middle-deep hole crater reaming and undercutting method.

Study on Mechanism of Breakout and Breakage in Semisolid Metal Continuous Casting Process;

The practice of fabricating a pile by drilling and filling pedestal is described in the discussion.

Based on the affirmation to the technology properties of artificial excavated pile, especially according to the merit of peculiar residual soil containing solitary stone granite, the author mainly expatiated appropriate pedestal, reasonable reinforcement, simpilifying foundation pile-cap design under the column to bring about economic profit on the basis of safe conduct.

Experimental research and analysis of cast-in-place piles with expanded-base and post-grouting;

The cast-in-situ pile with expanded-base and post-pressure grouting is a new type of pile foundation developed from normal cast-in-site pile, in which the construction techniques of expanded-base and post-pressure grouting are combined.

Comparisons of hydraulic natures such as flow pattern,pressure fluctuation,cavitation, and vibration between two kinds of culvert shape behind valve,top expansion and bottom sudden expansion,are carried out in this paper.