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SAW sensing technology has advantages of wireless, passive, small size, low cost, fast response, strong anti-electromagnetic radiation, measurable for moving or rotating objects, tolerable for wet dirty or high temperature and other harsh environments. Comparing with the traditional sensing methods, the test of SAW sensing technology can cover almost all the needs of digital substation internet of things.

The effective treatment of void cement concrete pavement slab through grouting technology is the important premise of ensuring the service performance of asphalt overlay engineer on cement concrete pavement. Based on the current problems of grouting technology, we did experimental studies on the mixing proportion of grout slurry and analyzed the effects of slurry composition and admixture type on mechanical properties including the strength, mobility, viscosity, expansion rate and bleeding rate of the slurry and on the service performance. Based on these, we put forward the control indexes for grouting slurry mix proportion determination which provided guidance for the design and construction quality control of grouting under the old cement concrete pavement slab.

A mechanical model for Sarma method was built based on a sliding of simple non-homogeneous rock slope as the research object. The relationship between the lateral positive pressure on block and the critical acceleration coefficient were gotten according to the rock slope block static equilibrium conditions. Then the critical acceleration coefficient formula was deduced. So that the coefficient of slopes security and stability under the conditions of the earthquake intensity were receieved.By using the functional relation between the slopes security and stability coefficient and the critical acceleration coefficient, a monotonously decreases function relationships between the rock slopes security and stability coefficient and the critical acceleration coefficient drowned by the calculation and analysis was gotten. The results show that, this method does not need iteration when compared with the traditional Sarma method; hence a convergence problem does not exist. It also can simplify the calculation and reduce a large number of calculations, the calculated results can meet the requirements after a number of numerical examples analysis.

In recent years, along with realize to the environmental protection of strengthen increasingly, make use of various industry to discard the conduct and actions of builds road the material already widespread be subjected to the people of value. Make the grass-roots material to construct with the coal stone the road contain many advantages, not only can economize the resources of the land, but also found out a fit path for the processing of this kind of industry wastes. This text combines the construction of the express line of a mountain City to be the advantage that the road faces the grass-roots material and applied the scope, economic performance...etc. to make some studies for the coal stone.