【摘要】 基于Mindlin应力解的桩筏基础、土钉墙、岩石锚杆等的理论计算及应用较多,但是对与煤矿井筒刚性连接的井塔进行纠偏处理在实际工程中比较少见。应力解除法在房屋纠偏中得到了良好的运用而在井塔纠偏中还无先例。应用有限元数值模拟和弹性力学Mindlin解2种方法对井塔应力解除纠偏进行验证。通过考虑土体开挖卸荷比对Mindlin解影响而对其进行修正,得到的结果与有限元数值模拟结果一致,可以验证:应力解除法能够有效运用于井塔纠偏;增大应力解除区宽度、减小应力解除孔到井筒的距离、适当增加应力解除孔深度和增大应力解除孔孔径可以有效提高纠偏效果。更多还原

【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 successfully 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 rectifying 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 increasing 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 effectively enhance the rectifying performance.更多还原