The emittance growing problem of non-corelating and non-coupling beam after passing through a lattice with transverse and longitude coupling was studied using linear transport theory.

According to the characteristics of longitudinal cracks in this area,the preventing principle and concrete measures to sub-grade longitudinal cracks in new constructive roads are presented.

Through inspecting the hydrographical conditions,geological conditions,climatic conditions,and investigation at scene,the main reason of highway longitudinal cracks is the frost heaving of foundations of the highway.

The calculated results indicate that when the temperature changes, the tensile stress at the lower extreme fibers of the flange plate near rib exceeds the tensile strength of concrete subjected to the combined action of triaxial stresses and results in the longitudinal cracks of the flange plate.

Influence factors of embankment longitudinal cracks in permafrost regions;

Analysis and treatment of longitudinal cracks in reinforced concrete frame structure;

Research on the longitudinal crack of with reinforced concrete thick slabs with shear effect;