The development and the latest progress in the design and manufacture of the disc refiner, the micro-refining mechanism, measurement of operation parameters, operation controlling , and equipment maintenance are particularly discussed.

With practical engineering examples,the application of the technology of base grouting in the Tianjin area is introduced in the paper from the angles of the grouting mechanism,construction parameters(grouting content,grouting pressure,grout mixing,grouting time),and construction processes.

Due to the difference of depth of breast wall in the construction techniques of Zhang′s and Bai′s split grouting,the position of original split dam body is different in these two techniques,which will influence curtain shape of dam body,origination point of split grouting,the movement law of grouting fluid and mechanism of grouting.