关键词: 井塔纠偏, 应力解除法, 三维有限元, Mindlin解

Abstract: The theoretical calculation and application based on the Mindlin’s Stress Equations have been widely used in Piled raft foundation, soil nailing wall, rock bolt foundation, etc., while rarely used in rectifying the tower, which has rigid connection with the shaft. Stress relief method has been suc- cessfully used in rectifying building but none in rectifying shaft tower. Numerical simulation and the Mindlin’s equations have both been utilized to verify that the stress relief method is effective in rectify- ing shaft tower. The results of Mindlin’s equations have been revised by considering the unloading ratio of the excavation, and they are in great accordance with the numerical simulation results. Both of them have shown that stress relief method can be successfully used in shaft tower rectification; and that in- creasing the width of the stress relief area, shortening the distance between stress relief hole and shaft tower, deepening the stress relief hole and increasing the diameter of the stress relief hole can effec- tively enhance the rectifying performance.

Key words: tower rectifying；stress relief method；3D finite element；Mindlin&rsquo, s equations