Controlling the orientation of testing value of safety margine can reduce the risk of engineering construction quality.

In China, a big argument has lasted for five years in the field of civil engineering, which is that according to the economic development in the past twenty years, is it necessary to increase the safety margin for structural design to a great extent? Some points are different.

But from the view of safety, the application of high-strength materials can great increase safety margin of a structure.

Based on choosing safety factor that has prodigious influence on effect and expense of prevention and cure in the landslide,whether safety repertory factor of landslide defined according to safety factor can weigh landslide safety repertory value behind being fathered or not is worth pondering over.

In this paper, the intensity of the piers is calculated and their safety reservation analyzed in order to guide and improve CWR design so as to increase safety and save cost.