Based on model test, the mechanism and effectiveness on abatement of cavitation by through water after culvert valve of high lift lock have been discussed.

Producing 32.5R Portland cement by using fly ash to substitute partly clay;

It also points out draining test must made according to standard needs before finishing the project,so as to improve the project quality and ensure the normal use.

The key to the solution of maximum discharge capacity of plastic drainage stack in building was to determine the maximum allowable fullness ratio, α of the stack.

Application Enforcement of the plastic drainage pipes had to stablish the theory for estimating of the maximum discharge capacity of the plastic drainage stack in building and the core issue of the theory was to determining of the maximum allowable fullness ratio of the plastic stack.

Discussion on examination methods of discharge capacity of plastic drainboard and equivalent opening size of filter;

Effect and selection of discharge capacity of prefabricated vertical drains during consolidation;

An introduction is given to the raw materials, forms, and engineering characteristics of the plastic blind drain-a new type of geosynthetic, and it is pointed out that the porosity of opened voids, porosity, discharge capacity, and compressive strength of materials can be taken as the performance indexes of the plastic blind drain.