In the light of the revision of the design criteria and regulations about railway live loads in the Fundamental Code for the Design of Railway Bridges and Culverts,the paper raises a question whether type-83 piers can be normally used for live loads of the current P.

Investigation of environmental vibration control for high speed and heavy haul railway;

Thcrmal spray is an effective tcchnique to improve friction and corrosion resistance of engineering components and is widely applying to high-speed and heavy haul railway engineering.

The transportation organization of heavy haul railway is complex in China,especially,the feedback of empty cars.

It is an effective way of improving transport capacity to develop of heavy-haul railway.

Research purposes: The heavy-haul railway of foreign countries has successfully used the low-alloy rails containing Cr,but there was no application of low-alloy rails containing Cr in Chinese heavy haul railway in the past.

This paper expounds the necessity of applying the skylight technique in the comprehensive construction of heavy-haul railway, introduces the basic principles and the organization models of the skylight technique in the comprehensive construction, and sums up ans analyzes the features and application benefits of the technique.