maximum tension stress

The maximum tension stress 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；

Stress concentration occurs in surrounding rocks, while the maximum tension stress is less than the tensile strength of rock mass, so tensile crack does not take place.

动荷载作用下地下硐室群围岩出现较大的应力集中，但最大拉应力小于岩体的抗拉强度，地下硐室群围岩不会出现拉裂破坏。

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.

指出在头部滚筒作为驱动滚筒的布置系统中，胶带最大应变、力及张力位置不在驱动滚筒相遇点，而在过渡段第一组槽形托辊处。