In view of the problems existing in gravity conduit design,this paper takes the minimum cost of the gravity conduits as objective function,presents a new optimization design method for gravity conduits by using dynamic programming,and discusses the equivalent diameter,flow distribution,link pipe installation and reliability calculation of the gravity conduits.

Taking the example of water supplying project in east Xiamen,it compares and analyses stressed water pipe synthetically by qualitative and quantitative ways from aspects such as economic diameter,limited capacity technical features and comprehensive cost.

On project practice for direct weighting in long-distance water pipeline

With comparison of properties and advantages and disadvantages of different inside and outside anti-corrosion methods and materials, the selection of anti-corrosion of buried steel water pipeline are discussed.

This paper makes systematic analysis on the geneses and harmfulness of pipe scale in urban water pipeline,and advances some measures for preventing the scale in urban water pipeline.