Considerations of underground factory excavation and temperature stress on rock bolt crane beam

Abstract The cracks in rock bolt crane beams are mainly caused by stress release during excavation of surrounding rock and temperature stress during concrete pouring. Based on three‐dimensional nonlinear finite element theory, the stress distribution of rock bolt crane beam during excavation of underground powerhouses and the temperature stress field under the use of cooling water pipes and surface insulation are simulated separately, and the impact of both on the crack resistance safety of rock bolt crane beam is comprehensively considered.