The maximumtensionstress appears at the base bottom, which is sensitive to thawing settlement.
路面层底拉应力最大,对融沉变形反映敏感;
2
Stress concentration occurs in surrounding rocks, while the maximumtensionstress is less than the tensile strength of rock mass, so tensile crack does not take place.
It points out that the position of the maximum strain, stress and tension is at first group trough type roller, not at passing poion of pulley if the head drum works as pulley.