The paper briefed on the situation of safety equipment at level crossings inside stations,expounded the necessity of applying micro computer automatic notification system,put forward basic requirement for the equipment,and demonstrated the feasibility and design essentials of hardware and software,as well as the composition,major functional index and application results.

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.