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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。
The theoretical calculation and application of piled raft foundation, soil nailing wall, rock bolt and so on based on Mindlin stress solution are more. However, it is relatively rare in practical engineering to rectify the well tower rigidly connected with coal mine shaft well. Stress relieving method has been well used in house correction and there is no precedent in correction of well tower. Two methods of finite element numerical simulation and Mindlin solution of elastic mechanics were used to verify the stress relief correction of the tower. It can be verified that the stress relieving method can be effectively applied to correction of the well tower and the width of the stress relieving zone can be increased by correcting the effect of Mindlin solution by considering the unloading ratio of soil excavation. The results are consistent with the results of numerical simulation. , Reducing the distance between the stress relief hole and the wellbore, appropriately increasing the stress relief hole depth and increasing the stress relief hole diameter can effectively improve the correction effect.