Numerical simulation study of expansion and thermal stress field in new type of monolayer freezing shaft lining
Abstract：Based on a new type of monolayer shaft lining structure, numerical calculation method was used to in-depth study the temperature and expansion stress field in shaft lining of variable temperature, variable elastic modulus, variable constraints. The findings indicated that the new type of shaft＇ lining which is added with expansion agent in the pouring process is in a compressive state, shaft lining radial will not crack. In shaft lining vertical produces a maximum of about 1.59 MPa compressive stress when using slight-expansion concrete, effectively prevent the formation of the temperature cracks in the shaft lining. Temperature stress only appears in the shaft lining surface from about 100 ram,tensile fracture belongs to the superficial cracks, and the vertical reinforcement on the inner edge of the shaft lining will contribute to the inhibition of horizontal fracture. Slight-expansion concrete can provide a maximum 2.8 MPa circumferential compression stress in the lining ring, making the shaft lining always under compression in the lining ring. The results have important guiding significance in the design and construction of monolayer shaft.
Keywords：monolayer freezing shaft liningtemperature stressexpansion stress
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 272-278 )